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  • DrD

    #20 -- A Question of Stability (Revised)

    By DrD

    Mechanics Corner
        A Journal of Applied Mechanics and Mathematics by DrD, #20
        © Machinery Dynamics Research, 2015
    A Question of Stability Introduction     The word stability in its several forms is widely used in nontechnical communication. A person whose life it highly consistent from day to day is said to have a stable life. When the political situation in a particular area appears to be unlikely to change, it is said to be stable. A person who is well balanced and unlikely to be easily provoked to anger is said to be a stable person. When the medical condition of a sick or injured person ceases to get worse, the person is said to be stabilized. A company on the verge of bankruptcy is said to be an unstable company. But what does the word stability mean in a technical context? Each of the foregoing examples hints at the technical meaning without really being explicit about it.   A factor g = accel of gravity was missing in the potential energy expression. That is now corrected.
        
     
        Stability.pdf
    • 16 comments
    • 5,724 views
  • DrD

    A Question for Readers

    By DrD

    Many of you have asked me various questions, so now it is my turn. Let me lay a bit of background first, and then the questions.   I have had some conversations recently with JAG (one of the other writers here at ME Forums) regarding the choice of software for 3D modeling and analysis. JAG has made some excellent suggestions, specifically a cloud based program called Onshape. Unfortunately, for reasons that are unclear, my computer cannot run Onshape; I have worked with their help people for several hours, all to no avail. JAG recommends this in part because there is a "free version for the hobbyist" and a relatively inexpensive "full version for the professional." That is pretty attractive, but since I can't run it, I'm stuck.   I gather that virtually all engineering colleges these days are teaching some sort of 3D modeling and analysis software, but that raises a few questions in my mind. 1. If your college teaches brandX 3D software, what will you do when you go to work for a small company that cannot afford anything more than 2D drafting (simple CAD), with no analysis capability at all? How will you do your job then? You probably have your own pocket calculator, but will you have your own copy of ANSYS or Pro-E? 2. What software does your school teach (every students should have an answer to this question, so I expect lots of replies on this one!)? 3. If you have used software extensively for analysis of engineering problems (beam deflections, stress analysis, fluid flow, heat transfer, etc), are you confident  that you will be able to work all of those problems if there is no such software available to you on the job?   I might add, as sort of a postscript, most of you know that I am older than dirt (I just had another birthday, so the situation is even worse!), so I tend to look at things from an elderly perspective. One of my great fears as a working engineer was "What will happen when I'm ask to do something that I don't know how to do?" It happened more than once, and it usually resulted in a flurry of intense research to come up to speed on whatever topic was involved. I could usually do that because I have a pretty good library, and I knew how to use a university library as well. But in terms of software, I was always concerned that I had no FEA program, so how could I do problems that others were doing by FEA? I have come up with some interesting work-arounds, including writing my own FEA for some problems, but I never wanted to be dependent on software that I could not afford to own. So, back to my questions about: How are you going to buy your own copy of ANSYS? DrD
    • 28 comments
    • 2,907 views
  • saurabhjain

    Calling Mechanical Engineers to collaborate on Twitter

    By saurabhjain

    If you are a mechanical engineering professional and have a twitter account .. we invite you in our mechanical engineering  campaign to collaborate on twitter.. Retweet the following status on https://twitter.com/mechportal/status/646544243649961985 Look forward for your presence. Regards Mechanical Engineeirng forum
    • 5 comments
    • 1,521 views
 

Warman Slurry Pump

Tobee® TH Slurry pumps are interchangeable with world’s standard Warman AH slurry pumps for heavy duties, A wide variety of impellers and shaft seals provide a perfect fit for a wide range of applications. The TH slurry pump provides excellent wear life while maintaining efficiency during the wear cycle providing the best total operating cost. These horizontal slurry pumps are designed for hyper heavy duty applications such as mill discharge, process plant, coal washing, dregding sands, tailings and high pressure pipelines, as well as other specialty applications. SPECIFICATIONS: Size: 1" to 22"
Capacity: 3.6-5400m3/h
Head: 6-125m
Handing solids: 0-130mm
Max.pressure: 2020 kPa
Materials: Hyper chrome alloy, Rubber, Polyurethane, Ceramic, Stainless steel etc. Design Features: • Bearing assembly - a large diameter shaft with short overhang minimizes deflection and contributes to long bearing life. Only four through bolts are required to hold the cartridge type housing in the frame.
• Liners - easily replaceable liners are bolted, not glued, to the casing for positive attachment and east of maintenance. Hard metal liners are completely interchangeable with pressure moulded elastomer.
• Elastomer seal rings back all liner joints.
• Casing - Casing halves of cast or ductile iron with external reinforcing ribs provide high operating pressure capabilities and an extra measure of safety.
• Impeller - front and rear shrouds have pump out vanes that reduce recirculation and seal contamination. Hard metal and moulded elastomer impellers are completely interchangeable.
• Cast in impeller threads require no inserts or nuts. High efficiency and high head designs are also available.
• Throatbush - wear is reduced and maintenance simplified by the use of tapered mating faces to allow positive accurate alignment during assembly and simple removal.
• One-piece frame - a very robust one-piece frame cradles the cartridge type bearing and shaft assembly.
• An external impeller adjustment mechanism is provided below the bearing housing for easy adjustment of impeller clearance. HEBEI TOBEE PUMP CO.,LIMITED
Add:Hi-tech Development Zone | Shijiazhuang City | Hebei Province | China.
Email:Sales@tobeepump.com | Skype:Tobee.pump | Mob:+86-18032034573 | Web:www.tobeepump.com
 

Horizontal Slurry Pump

Tobee® TH Slurry Pumps are the most comprehensive range of centrifugal slurry pumps for use in mining, minerals processing, coal preparation, dredging, metallurgy, power plant, chemical and general industry applications. The wetted parts materials designed by High abrasion and corrosion resistance alloy, rubber or polyurethane etc, Expecially for handling highly abrasive,high density slurries. Design Features:
• Horizontal,Cantilevered,Centrifugal,Single stage slurry pump design.
• Bearing assembly - A large diameter shaft with short overhang minimizes deflection and contributes to long bearing life. Only four through bolts are required to hold the cartridge type housing in the frame.
• Casing - Casing halves of cast or ductile iron with external reinforcing ribs provide high operating pressure capabilities and an extra measure of safety.
• Impeller - Front and rear shrouds have pump out vanes that reduce recirculation and seal contamination. Hard metal and moulded elastomer impellers are completely interchangeable.
• Liners - Easily replaceable liners are bolted, not glued, to the casing for positive attachment and east of maintenance. Hard metal liners are completely interchangeable with pressure moulded elastomer
• Throatbush - Wear is reduced and maintenance simplified by the use of tapered mating faces to allow positive accurate alignment during assembly and simple removal.
• Shaft seal - Packing seal,Centrifugal seal,Mechanical seal;
• Driving type - Flexible coupling,V-belt with pulleys,Gearbox,VFD,SCR control etc.
• The discharge branch can be oriented to any eight positions at the interval of 45 degrees;
• Easy to install and maintain in on-site application. Typical: Mining & Mineral Processing
The slow running speeds of the Tobee TH Heavy Duty Slurry Pump, together with the comprehensive choice of abrasion resistant alloys and elastomers, provide unrivalled performance and service life for all abrasive mining and minerals processing applications. Chemical Process
The interchangeability of alloy and elastomer components in the same pump casing, together with a wide range of mechanical seals, make the Tobee TH Heavy Duty Slurry Pump the most flexible choice for the chemical plant environment. Sand & Gravel
Designed for easy and simple strip down and re-assembly, the Tobee TH Heavy Duty Slurry Pump minimises downtime, making it the ideal choice where installed stand by pumps are not available. Sugar Processing
The premium reliability and service life of the Tobee TH Heavy Duty Slurry Pump is specified by many sugar plant engineers worldwide where uninterrupted pump operation during the sugar campaign is a critical requirement. Flue Gas Desulphurisation
The new generation of specially formulated abrasion and corrosion resistant alloys, together with the very latest elastomer technology, positions Tobee Pumps firmly as a major supplier of pumps to the FGD industry. Oil & Gas Exploration
Over a number of years we have developed the proven design of the Tobee TH Heavy Duty Slurry Pump ranges to suit the specific demands of offshore applications. We can now offer the most reliable top side solution to erosive wear. Industrial Applications
Wherever abrasive solids are causing premature failure of pumps, the Tobee TH Heavy Duty Slurry Pump range has the right combination of performance, wear life and reliability to bring the customer the lowest cost of ownership. HEBEI TOBEE PUMP CO.,LIMITED
Add:Hi-tech Development Zone | Shijiazhuang City | Hebei Province | China.
Email:Sales@tobeepump.com | Skype:Tobee.pump | Mob:+86-18032034573 | Web:www.tobeepump.com
 

Vertical Slurry Pump

Tobee® TP(R) Vertical slurry pump is a cantilever sump pump,Which work submerged to transport high abrasive and high density slurries with large particles.It doesn't need any seal water. Hard metal lined or fully rubber lined fitted.High capacity double suction semi-open impeller design.and suction agitator is also available.
Design features:
1.Vertical,Submerged,Cantilevered shaft sump slurry pump 2.Bearing Assembly - The bearings, shaft and housing are generously proportioned to avoid problems associated with the operation of cantilevered shafts in the first critical speed zones. 3..Column Assembly - Completely fabricated from antiwear carbon steel. The TPR model is rubber covered. 4.Shaft - Different length of the pump drive shaft or suction extension pipe could be selected 5.Casing - TP(R) has a simple bolt-on attachment to the base of the column. It is manufactured from a wear resistant alloy for the TP pump series and from moulded Rubber for the TPR pump series. 6.Impeller - Double suction semi-open impeller design, Wear resistant alloys, polyurethane and moulded elastomer impellers are interchangeable. 7.Upper Strainer - Drop-in metal mesh; snap-on elastomer or polyurethane for TP and TPR pumps. Strainers fit in column openings. 8.Lower Strainer - Bolted metal or polyurethane for TP pumps; moulded snap-on elastomer for TPR pumps. 9.Discharge Pipe - Metal for TP pumps; Rubber covered for TPR pumps. All wetted metal parts are completely rust protected 10..Agitator option keeps solids in suspension,Alternatively, a mechanical agitator is fitted to an extended shaft protruding from the impeller eye. 11.Don’t need any seal and seal water. HEBEI TOBEE PUMP CO.,LIMITED
Add:Hi-tech Development Zone | Shijiazhuang City | Hebei Province | China.
Email:Sales@tobeepump.com | Skype:Tobee.pump | Mob:+86-18032034573 | Web:www.tobeepump.com
 

Gravel Sand Pump

Tobee® TG Gravel Sand Pump is horizontal single-casing gravel pump with wide channel to transfer sands,slurries or gravels with big particle size. The wet parts are made of Ni-hard and high-Chrome alloys to ensure long service life. It has superior performance than common pumps in dredging, sand mining, barge loading and mineral processing etc. With all the advantages of TG Gravel pump,TGH gravel pump has achieved extra high head for special working conditions. Design Features: • Horizontal,Cantilevered, Single casing, Centrifugal Gravel sand pump.
• The wetted parts are made of Ni-hard and Ultrahigh-chrome alloys with super strong abrasion resistance.
• The discharge direction of pump can be oriented in any angle of 360°.
• Packing seal, Expeller seal and Mechanical seal are available as per different application.
• Excellent NPSH performance.
• Simple and reliable construction, Easy to disassembly, assembly and maintain. HEBEI TOBEE PUMP CO.,LIMITED
Add:Hi-tech Development Zone | Shijiazhuang City | Hebei Province | China.
Email:Sales@tobeepump.com | Skype:Tobee.pump | Mob:+86-18032034573 | Web:www.tobeepump.com
 

Common Thermoplastics Used in Today's Plastic Injection Moulding

Acrylonitrile Butadiene Styrene  Acrylonitrile Butadiene Styrene (ABS), it is a dark thermoplastic and amorphous polymer. It is a terpolymer (copolymer comprising of three unmistakable monomers) of Acrylonitrile, Butadiene, and Styrene. Together they make an item that is adaptable and light in weight that can be shaped into numerous things that we use in our regular day to day existences.  The benefit of ABS is that an assortment of changes can be had to enhance impact protection, sturdiness, and heat protection. Molding at a high temperature enhances the gleam and heat protection of the item while molding at a low temperature is where the highest impact resistance and strength are obtained. Polyethylene  Polyethylene is a thermoplastic polymer with variable crystalline structure and a huge scope of uses relying upon the type. It is a standout amongst the most adaptable and most famous plastics on the planet since the 1950s when it was produced by German and Italian researchers. The two most regular kinds of this plastic are high-thickness polyethylene (HDPE) and low-thickness polyethylene (LDPE).  The upsides of polyethylene are abnormal amounts of pliability, rigidity, impact protection, protection from dampness, and recyclability. The higher the thickness of the polyethylene material utilized the more grounded, more unbending, and more heat safe the plastic is. The essential employments of polyethylene are plastic sacks, plastic films, compartments including bottles, and geomembranes. Polyamide (Nylon)  Nylon material is utilized as a part of a vast scope of various applications in view of its electrical properties, sturdiness, wear protection and chemical protection being very noteworthy. Nylon has an abnormal state of strength and is impervious to numerous outer components like scratches, impact, and chemicals. This material produces plastic parts utilized as a part of numerous businesses, for example,  Medicinal items  Car items  Games hardware  Attire and footwear  Industrial components   High Impact Polystyrene  High Impact Polystyrene (HIPS) is a prevalent and intense plastic that is in the Polystyrene family. Polystyrene is weak and can be more impact safe if joined with different materials. It is made from modifying crystal styrene with rubber which helps to give it many levels of impact resistance. It is low cost, has good dimensional stability and rigidity. There are FDA grades available since it is non-toxic and used as containers for many food goods.  It is exceptionally flammable, yet there are fire resistant and polished evaluations that are generally utilized for injection molding.  Polypropylene  This is an extremely regular plastic that is known for its adaptability. PP (polypropylene) is an exceptionally unique plastic and has been intensified for an extensive variety of properties. A few attributes of this plastic are its high liquefying point, high protection toward stress and splitting, magnificent impact quality, and does not break down from responses with water, acids, and cleansers.  PP is ok for use as food holders since it doesn’t filter chemicals into nourishment items. It can be generally found in family unit merchandise, for example, utensils, athletic clothing, area rugs, and car parts, for example, auto batteries.  

10 lý do khiến chiếc xe của bạn bị rung lắc

Điều gì khiến cho chiếc xe của bạn bị rung lắc? Có thể đang có nhiều vấn đề và nguyên nhân gây ra. Nguyên nhân về kỹ thuật xe là điều phải đặc biệt chú ý. Sử dụng một chiếc ô tô lâu dài, chắc chắn điều không tránh khỏi là các vấn đề kỹ thuật của xe ngày càng đi xuống. Một trong những vấn đề xảy ra là sự rung lắc xe khi chuyển động. Điều này làm bạn khó chịu khi ngồi trên xe. Hơn thế nữa, nó còn ảnh hưởng đến các tính năng an toàn, dẫn hướng trên xe. Vậy nguyên nhân nào dẫn đến sự rung lắc này? Bạn sẽ tự hỏi rằng tại sao xe mình lại rung như vậy? Nguyên nhân do đâu? Tiếp tục đi có bị ảnh hưởng gì không? Nếu bạn không phải là người chuyên môn kỹ thuật ô tô, bạn khó có thể biết được nguyên nhân là gì? Thật sự là một lợi thế nếu bạn có thể phán đoán được nguyên nhân gây ra sự rung lắc này. Nó giúp bạn biết được vì sao, bộ phận hay chi tiết nào hỏng, cần khắc phục chỗ nào… Điều này sẽ giúp bạn nắm được chi phí của việc sửa chữa… Dưới đây là tổng hợp 10 nguyên nhân chính thường gây ra sự rung lắc ô tô. 1Lốp xe bị hỏng   Lốp xe bị cũ, khô, phồng rộp, mòn là nguyên nhân gây xe bị rung lắc quá mức khi chuyển động. Bởi vì lốp xe là bộ phận duy nhất tiếp xúc, liên kết chiếc xe của bạn với đường, nó lại làm việc trong những điều kiện vô cùng khắc nghiệt nên tuổi thọ của lốp xe là tương đối ngắn.

Dưới đây là các vấn đề chính mà lốp gặp phải gây ra rung lắc cho xe: + Lốp xe bị nứt, tách - yêu cầu phải thay lốp   + Bề mặt lốp bị mòn không đều (vẫn còn đảm bảo tiêu chuẩn) - yêu cầu đảo lốp, xoay lốp + Lốp xe đã bị méo (out of round), không còn cuộn đều - yêu cầu thay lốp + Áp suất lốp quá thấp - bơm thêm cho lốp + Lốp quá cũ - thay lốp
  2Lốp Profile thấp hoặc lốp cản lăn thấp   Lốp cản lăn thấp hay còn được gọi là lốp profile thấp, đang ngày càng trở nên phổ biến với sự gia tăng xe hybrid và EVs. Những lốp xe này làm giảm lực cản, với mục đích làm tăng sự tiết kiệm nhiên liệu EPA, là một biện pháp quan trọng của các loại xe này, đặc biệt cho mục đích marketing. Tuy nhiên những lốp xe cản lăn/profile thấp thường không hấp thụ bề mặt đường tốt, do đó nó truyền va đập lên xe và hệ thống lái gây ra một sự rung lắc và ảnh hướng đến cảm giác lái. Nhiều người thích loại lốp này vì nhìn nó đẳng cấp, thể thao. Tuy nhiên nó lại không thực sự tốt nếu xe của bạn không được thiết kế để lắp loại lốp này. Đây chỉ là một nguyên nhân gây ra sự rung lắc xe. Bởi nó liên quan đến thiết kế xe. Tuy nhiên bạn có thể khắc phục bằng cách thay loại lốp và la răng (không khuyến cáo). Khuyên bạn nên khắc phục các vấn đề khác. 3La răng bị méo hoặc hư hỏng nặng   Các nguyên nhân như đường ổ gà, bị va chạm gây ra sự hư hỏng la răng, khiến chiếc la răng của bạn bị méo, nứt,... Nếu một hoặc các bánh xe bị hỏng, méo la răng, nó sẽ khiến bánh xe bị mất cân bằng khi quay, sự mất cân bằng này tác động lên xe gây ra sự rung lắc. Trầm trọng hơn, nó còn gây ra sự mất kiểm soát dẫn hướng, gây mất an toàn... Trường hợp bị hỏng nặng thì bạn có thể nhận thấy bằng mắt. Nhưng với những trường hợp không thể quan sát, bạn cần sự hỗ trợ kiểm tra của kỹ thuật viên bằng cạch sử dụng máy chuyên dụng để đo sự rung lắc bánh xe. Khi la răng bị méo, nứt hỏng nặng, khuyên bạn nên thay thế bánh xe mới. 4La răng/Bánh xe không cân bằng   Việc bánh xe hoặc la răng không cân bằng gây ra sự mất ổn định khi quay, nó gây ra các mô men và các lực ly tâm không cân bằng, khiến cho bánh xe bị lắc, mất ổn định, tác động lên thân xe gây ra rung lắc xe. Việc cân bằng bánh xe tốt nhất phải có trang thiết bị và máy tính kiểm tra để đo các khối lượng cân bằng. Chắc hẳn bạn đã thấy các mẩu kim loại nhỏ gắn vào la răng, đó chính là các mảnh khối lượng cân bằng gắn vào. Việc bánh xe hoặc la răng không cân bằng là một nguyên nhân phổ biến gây ra sự rung lắc bánh xe. Tuy nhiên bạn không thể tự mình kiểm tra được, mà phải cần đến sự trợ giúp của các gara có trang thiết bị đo. Giá cả của việc kiểm tra này cũng không đắt đâu, nên bạn yên tâm đem xe đến các đại lý 3S hoặc 5S để kiểm tra nhé. 5Nguyên nhân do hệ thống lái/Trợ lực lái   Nếu chiếc xe của bạn chỉ bị rung lắc, hay cảm giác rung lắc trên tay bạn khi mà bạn đánh lái thì chắc chắn nguyên nhân từ hệ thống lái,: các chi tiết liên kết bị nỏng, rơ, trợ lực lái có vấn đề. Có thể là bị dò dỉ dầu trợ lực, bơm hỏng, hay các thanh răng, các thanh rằng bị cong, các khớp nối quá rơ rão,... Do vậy, khi bạn đánh lái mà cảm thấy rung lắc ngay cả trên mặt đường bằng phẳng, thì tốt nhất bạn hãy đánh xe đến gara và yêu cầu kiểm tra hệ thống lái. 6Trục quay và Cầu xe có vấn đề   Xe của bạn chạy trên đường, băng qua các vật cản có thể gây ra hư hỏng các trục và cầu xe. Dẫn đến trục các đăng, cầu xe, các bán trục có thể bị cong, các khớp nối bị méo nứt... Vì nó truyền chuyển động, truyền lực từ động cơ đến bánh xe, cho nên nguyên nhân gây ra khiến trục mất cân bằng khi quay, tạo sự dao động dẫn đến rung lắc xe. Kể cả các trục bánh chủ động hay bị động bị hư hại đều gây ra sự rung lắc này. 7Hệ thống phanh có vấn đề   Nếu hiện tượng rung lắc xe xảy ra khi bạn đạp phanh, khả năng lớn là nguyên nhân gây ra ở hệ thống phanh. Có thể đĩa phanh hoặc trống phanh bị cong, nứt, méo... hoặc có sự mắc kẹt ở má phanh. Hay má phanh đã bị mòn hết, khi phanh các tấm kim loại ép nhau, vì nó không phẳng nên gây ra rung lắc. 8Các điểm liên kết của động cơ có vấn đề   Các cụm liên kết giữa động cơ với khung xe, với giá đỡ được cấu tạo từ kim loại và cao su. Nếu các cụm kết nối này bị vỡ, hỏng, nó sẽ làm mất tính năng đàn hồi cần thiết, mất liên kết giữa động cơ và thân xe. Do dó nó gây ra sự rung lắc rất mạnh. Hãy nhanh chóng đưa xe đến gara để sửa chữa và thay thế các cụm kết nối này để tránh làm hư hại đến động cơ và giá đỡ, thân xe. 9Động cơ có vấn đề   Nếu sự rung lắc mạnh phát ra từ động cơ thì chắc chắn chiếc động cơ trên xe của bạn đang gặp vấn đề kỹ thuật cần khắc phục kịp thời. Các nguyên nhân khiến động cơ rưng lắc rất nhiều: một hoặc vài xy lanh bị mất lửa; hệ thống nạp bị tắc hay cảm biến hỏng; nguyên nhân từ trục khuỷu, thanh truyền có thể bị cong,... Để cảm nhận được rung khi xe đang chạy, bạn cần có kinh nghiệm lái xe: khi bạn tăng tốc, chiếc xe có cảm giác như co giật, rùng mình; xe chạy một lát sau đó bắt đầu rung lắc,... Khi bạn nhận thấy sự rung lắc xe là từ động cơ, hãy đưa xe đi sửa chữa ngay, nếu nhẹ, bạn chỉ phải thay một vài cái buji, hay bộ lọc khí. 10Hệ thống treo có vấn đề   Hệ thống treo là liên kết duy nhất từ bánh xe lên thân xe. Nó là một hệ thống có chức năng kết nối xe thân xe với truyền động, và là tiện nghi. Khi hệ thống treo bị trục trặc: gãy nhíp, gãy lò xo, hỏng lớp đệm, giảm trấn bị hỏng,... nó sẽ không thể hấp thu được các rung động từ mặt đường nữa, và bản thân sự hư hại này cũng trực tiếp gây ra tác động đến thân xe khiến cho chiếc xe của bạn bị rung lắc mạnh. Trên đây là các nguyên nhân chính gây ra sự rung lắc xe của bạn. Khi xe của bạn trở nên rung lắc, khuyên bạn hãy đưa xe đến các trung tâm dịch vụ để kiểm tra và khắc phục kịp thời.

EnterKnow

EnterKnow

 

Mechanical Core Industry Job Oppurtunities

HVAC industry offers good potential for numerous careers in various fields as in Design & Drafting, Execution & Maintenance, AC Technicians and sales & Marketing. Apart, it also provides scope even for self employment and entrepreneurship. HVAC industry can even thrive in times of poor economy. According to US Bureau of Labor Statistics, a typical Technician can earn around US $18 dollars per Hour, narrating the work and economical potential of the industry. If any one want to know more about this topic Comment below

Dhanush Mep

Dhanush Mep

 

Novel Rotary-Turbo-InFlow Tech / Gearturbine Project – Featured Development

*GEARTURBINE PROJECT: Atypical InFlow Thermodynamic Technology Proposal Submission Innovative [TURBO-ROTARY] Novel (Fueled) Motor Engine Type -The Gearturbine comes from the contemporary ecological essential global needs of an efficient power plant fueled motor engine. -Power thrust by bar (tube); air, sea, land and power generation, work use application. *Have the similar simple basic system of the "Aelopilie" Heron´s Steam Turbine device from Alexandria, [10-70 AD] one thousand nine hundred years ago. Because; the circular dynamic motion, with 2/Two Opposites power [polar position] lever, and is feeds from his axis center. YouTube Video/10.30 min; * Atypical New · GEARTURBINE / Retrodynamic = DextroRPM=> VS <=LevoInFlow + Ying Yang Thrust Way Type - Non Waste Looses http://www.youtube.com/watch?v=0cPo9Lf44TE -Desirable Contemporary Innovation, With the Possible [Efficient] Invention. -Mechanical [Thermodynamic] Universal Human History Evolution. [unlike] Epic Technology Revelation. -Next Step Power-plant New Design Form Function Device Change. *8-X/Y Thermodynamic CYCLE - Way Steps: 1)1-Compression / bigger 2)2-Turbo 1 cold 3)2-Turbo 2 cold 4)2-Combustion - circular motion flames / opposites 5)2-Thrust - single turbo & planetary gears / ying yang 6)2-Turbo 2 hot 7)2-Turbo 1 hot 8)1-Turbine / bigger *Innovation Technology Break Barrier / Paradigm [broken-Seal] Solution. State of the art. Innovative Turbo-Rotary concept Top system. -With Retrodynamic Dextrogiro vs. Levogiro Phenomenon Effect. / Rotor-RPM VS InFlow / front=> to <=front; "Collision-Interaction Type" - inflow vs. blades-gear-move. Technical unique dynamic innovative motion mode. [Retrodynamic Reaction = When the inflow have more velocity the rotor have more RPM Acceleration, with high (XY Position) Momentum] Which the internal flow (and rotor) duplicate its speed, when activated being in a rotor (and inflow) with [inverse] opposite Turns. A very strong Novel concept of torque power thrust. At field explanatory example with a metaphor is like if a sailboat take the wind from his prow front to move; wind/inflow + knots/rpm + wind/inflow + knots/rpm + wind/inflow + knots/rpm + etc... = Acceleration x Acceleration = Exponential Acceleration. Whereas it has more movements forwards, it receives a frontal impulse still but to move more forwards. A present example of the implementation of the Retrodynamic effect is in the application in the accelerator (and collider) of particles that this in the border of Switzerland and France. -Shape-Mass + Rotary-Motion = Inertia-Dynamic / Form-Function Wide [Flat] Cylindrical shape + positive dynamic rotary mass = continue Inertia kinetic positive tendency motion / all the complete Rotary motor mass weight is going with the power thrust move circular direction. -Non-waste parasitic looses system for cooling, lubrication & combustion; -Lubrication & Combustion, inside a conduit radial position, out way direction, activated by Centrifugal Force-Fueled Injected. -Cooling; a) IN-Thermomix flow, & OUT-Air Thermo transference. -Combustion 2Two [inside-Rotary-Dynamic] continue circular [Rockets] flames. Like two dragons trying to bite the tail of the [ying yang] opposite other.-Increase the first compression by going of flow reduction of one big circumference blades going pass to 2TWO reduced, very long distance (total captive compression) INFLOW [inside propulsion] CONDUITS [long flow interaction] [like a digestive system] Start were ends, in perfect shape balance in perfect equilibrium well balanced, like a snake bite his own tale. -4 TURBOS Rotary [inside-rotary-active] [in-Flow, Out-Flow] Total Thrust-Power Regeneration [Complete] Power System. -Mechanical direct 2two [small] "Planetary Gears" at polar position. Like the Ying Yang Symbol/Concept. Wide out the Rotor circumference were have much more lever [HIGH Torque] POWER THRUST. -Military benefits, No blade erosion by sand & very low heat target profile.-3 stages of inflow turbo compression before combustion; 1)1-Turbine, 2)2-Turbos 3)2-Turbos. -And 3 points of power thrust; 1-flow way, 2-gear, 3-turbine. *The most innovative power plant motor engine project today. Higher efficient % percent. Next trend wave toward global technological coming change. Patent; Dic. 1991 IMPI Mexico #197187 - Carlos Barrera. - Individual Designer - Inventor and project owner. / All Rights Reserved. - Monterrey NL Mexico.   _______________________________________________________________________________________________________________________________________________________________________________________   Featured Project Development - State of the Art Novel InFlowTech; 1Gearturbine RotaryTurbo 2Imploturbocompressor One Compression Step: *1-GEARTURBINE PROJECT Rotary-Turbo-InFlow Tech Atypical InFlow Thermodynamic Technology Proposal Submission Novel Fueled Motor Engine Type State of the art Innovative concept Top system Higher efficient percent.*Power by bar, for Air-Planes, Sea-Boats, Land-Transport & Dynamic Power-Plant Generation. -Have similar system of the Aeolipile Heron Steam device from Alexandria 10-70 AD. -New Form-Function Motor-Engine Device. Next Step, Epic Design Change, Broken-Seal Revelation. -Desirable Power-Plant Innovation. YouTube; * Atypical New • GEARTURBINE / Retrodynamic = DextroRPM VS LevoInFlow + Ying Yang Thrust Way Type - Non Waste Looses -This  innovative concept consists of hull and core where are held all 8 Steps of the work-flow which make the concept functional. The core has several gears and turbines which are responsible for these 8 steps (5 of them are dedicated to the turbo stages). The first step is fuel compression, followed by 2 cold turbo levels. The fourth step is where the fuel starts burning – combustion stage, which creates thrust for the next, 5th step – thrust step, which provides power to the planetary gears and turbines and moves the system. This step is followed by two hot turbo steps and the circle is enclosed by the final 8th step – bigger turbine. All this motion in a retrodynamic circumstance effect, wich is plus higher RPM speed by self motion. The Reaction at front of the action. 8-X/Y Thermodynamic CYCLE - Way Steps: 1)1-Compression / bigger 2)2-Turbo 1 cold 3)2-Turbo 2 cold 4)2-Combustion - circular motion flames / opposites 5)2-Thrust - single turbo & planetary gears / ying yang 6)2-Turbo 2 hot 7)2-Turbo 1 hot 8)1-Turbine / bigger -With Retrodynamic Dextrogiro vs Levogiro Phenomenon Effect. / Rotor-RPM VS InFlow / front to front; "Collision-Interaction Type" - inflow vs blades-gear-move. Technical unique dynamic innovative motion mode. [Retrodynamic Reaction = When the inflow have more velocity the rotor have more RPM Acceleration, with high (XY Position) Momentum] Which the internal flow (and rotor) duplicate its speed, when activated being in a rotor (and inflow) with [inverse] opposite Turns. The Reaction at front of the action. A very strong Novel torque power concept. -Non waste parasitic looses for; friction, cooling, lubrication & combustion. -Shape-Mass + Rotary-Motion = Inertia-Dynamic / Form-Function Wide [Flat] Cylindrical shape + positive dynamic rotary mass = continue Inertia positive tendency motion. Kinetic Rotating Mass. Tendency of matter to continue to move. Like a Free-Wheel. -Combustion 2Two continue circular [Rockets] flames. [ying yang] opposite one to the other. – With 2TWO very long distance INFLOW [inside propulsion] CONDUITS. -4 TURBOS Rotary Total Thrust-Power Regeneration Power System. -Mechanical direct 2two [Small] Planetary Gears at polar position. -Like the Ying Yang Symbol/Concept. -The Mechanical Gear Power Thrust Point Wide out the Rotor circumference were have much more lever [HIGH Torque] POWER THRUST. -No blade erosion by sand & very low heat target signature profile. -3 points of power thrust; 1-flow way, 2-gear, 3-turbine. *Patent; Dic. 1991 IMPI Mexico #197187 All Rights Reserved. Carlos Barrera. *2-IMPLOTURBOCOMPRESSOR; One Moving Part System Excellence Design - The InFlow Interaction comes from Macro-Flow and goes to Micro-Flow by Implossion - Only One Compression Step; Inflow, Compression and outflow at one simple circular dynamic motion Concept. ·“Excellence in Design" because is only one moving part. Only one unique compression step. Inflow and out flow at the same one system, This invention by its nature a logic and simple conception in the dynamics flow mechanics area. The invention is a wing made of one piece in a rotating motion, contained in a pair cavity system connected by implocavity, and interacting dynamically with a flow, that passes internally "Imploded" through its simple mechanism. This flow can be gas (air) or liquid (water). And have two different applications, in two different form-function; this one can be received (using the dynamic flow passage, as a receiver). Or it can be generated (with a power plant, generating a propulsion). An example cut be, as a Bike needs a chain to work from motor to wheel. And for the Imploturbocompressor application, cut be as; in a circumstance at the engine, as an A-activate flow, and with a a tube flow conduit going to the wheel as a B-receiving-flow the work use. To see a Imploturbocompressor animation, is posible on a simple way, just to check the Hurricane Satellite view, and is the same implo inflow way nature. And when the flow that is received and that is intended to be used at best, must no necessarily by a exhausting or rejection gas, but must be a dynamic passing gas or liquid flow with the only intention to count it or to measure it. This could be possible at the passing and interacting period when it passes inside its simple mechanism. This can be in any point of the work flow trajectory. In case the flow that is received is a water falling by gravity, and a dynamo is placed on the rotary bar, the Imploturbocompressor can profit an be obtained by generating? electricity such as obtained by the pelton well, like I say before. The "Imploturbocompressor", is a good option to pump water, or a gas flow, and all kinds of pipes lines dynamic moves.  Or only receive the air-liquid flow, in order to measure its passage with a counter placed on the bar, because when this flow passes through the simple mechanism of a rotating wing made of only one piece it interacts within the implocavities system. And this flow can be air wind, with the difference of can have an horizontal work position, and that particle technical circumstances make an easy way for urban building work new use application, and have wind flow from all the sides 180 grades view. The aforementioned information about this invention refers to technical applications, such as a dynamic flow receiver. (whether being gas or liquid). With the appropriate power plant and the appropriate dimensioning and number of RPM this invention is also feasible to generate an atmospheric air propulsion and the auto-propulsion of an aircraft. Being an effective and very simple system that implodes and compresses the atmospheric air permits the creation of a new concept of propulsion for aircrafts, due to its simple mechanism and innovative nature. At the place of the aircraft were the system appears and the manner how the propulsion direction can be oriented with a vectorial flow (no lobster tail) with I call "yo-yo system" (middle cut (at the shell) to move, one side loose), guided and balanced is feasible to create a new concept of TOVL-vertical take-off landing, Because the exhaust propulsion can going out radial in all the 360 vectorial positions, going out direct all the time in all the vectors direction. With his rotor cover for an better furtive fly, like going down of a bridge for example. Likewise, with the due form and dimensioning, and considering the liquid density and the due revolutions for this element there could be generated a propulsion (water) in order to move an aquatic ship, whether on surface or under water. Also can be a good option to pump liquid combustion for a rocket propulsion. Making a metaphoric comparison with the intention to expose it more clearly for a better comprehension of this innovative technical detail, it would be similar to the trajectory and motion of a dynamic flow compared with a rope (extended) that passes through the system would have now a knot (without obstructing the flow), so the complete way of the flow at the imploturbocompresor system have three direct ways and between make two different turns; direct way (entrance) - turn - direct way (implocavity) - turn - direct way (exit), all this in a 1 simple circular move system concept. Its prudent to mention that the curves and the inclinations of the blades of a rotating wing made of this invention, is conferred by its shape and function a structural rigidity allowing it to conduct and alter appropriately the dynamic flow passing through its system. 1326 W *Author; Carlos Barrera. Inventor-Individual/Self Taught. Monterrey, NL Mexico 66220. Resume; *State of the Art - Novel InFlow Tech - Featured Project Development; |/ ·1; Rotary-Turbo-InFlow Tech / - GEARTURBINE PROJECT Have the similar basic system of the Aeolipilie Heron Steam Turbine device from Alexandria 10-70 AD * With Retrodynamic = DextroRPM VS LevoInFlow + Ying Yang Way Power Type - Non Waste Looses *8X/Y Thermodynamic CYCLE Way Steps. 4 Turbos, Higher efficient percent. No blade erosion by sand & very low heat target signature Pat:197187IMPI MX Dic1991 Atypical Motor Engine Type. |/·2; Imploturbocompressor; One Moving Part System Excellence Design - The InFlow Interaction comes from Macro-Flow and goes to Micro-Flow by Implossion - Only One Compression Step; Inflow, Compression and outflow at one simple circular dynamic motion / New Concept. To see a Imploturbocompressor animation, is possible on a simple way, just to check an Hurricane Satellite view, and is the same implo inflow way nature. Tags; Aero, aerodynamics, aeolipile, alternative, applied, atypical, bang, blow, change, combustion, compression, compressor, concept, cycle, design, development, device, dynamic, ecological, efficient, electrolysis, emerging, energy, engine, engineering, flow, gear, gearturbine, generator, idea, imploturbocompressor, in, industry, inflow, information, innovation, invention, investigation, jet, mechanical, momentum, motion, motor, new, next, on, paradigm, power, project, propulsion, reaction, research, retrodynamic, rotary, rotor, scientific, shock, squeeze, suck, system, task, tech, technical, technology, thermodynamic, thrust, tip, top, torque, total, transport, trends, turbine, turbo, turbomachinery, type, unconventional, unlike, unpresedent, vtol, wave, weird,   

retrodynamic

retrodynamic

 

State of the Art Novel InFlowTech: 1-Gearturbine/RotaryTurbo-LikeAeolipile 10–70AD, 2-Imploturbocompressor/ One Compression Step, From Macro to Micro

Featured Project Development - State of the Art Novel InFlowTech; 1Gearturbine RotaryTurbo 2Imploturbocompressor One Compression Step: *1-GEARTURBINE PROJECT Rotary-Turbo-InFlow Tech Atypical InFlow Thermodynamic Technology Proposal Submission Novel Fueled Motor Engine Type *Wordpress Blog State of the Art Novel InFlow Gearturbine Imploturbocompressor *1-GEARTURBINE BEHANCE Images Gallery Portafolio -YouTube; * Atypical New • GEARTURBINE / Retrodynamic = DextroRPM VS LevoInFlow + Ying Yang Thrust Way Type - Non Waste Looses State of the art Innovative concept Top system Higher efficient percent.*Power by bar, for Air-Planes, Sea-Boats, Land-Transport & Dynamic Power-Plant Generation. -Have similar system of the Aeolipile Heron Steam device from Alexandria 10-70 AD. -New Form-Function Motor-Engine Device. Next Step, Epic Design Change, Broken-Seal Revelation. -Desirable Power-Plant Innovation. -This  innovative concept consists of hull and core where are held all 8 Steps of the work-flow which make the concept functional. The core has several gears and turbines which are responsible for these 8 steps (5 of them are dedicated to the turbo stages). The first step is fuel compression, followed by 2 cold turbo levels. The fourth step is where the fuel starts burning – combustion stage, which creates thrust for the next, 5th step – thrust step, which provides power to the planetary gears and turbines and moves the system. This step is followed by two hot turbo steps and the circle is enclosed by the final 8th step – bigger turbine. All this motion in a retrodynamic circumstance effect, wich is plus higher RPM speed by self motion. The Reaction at front of the action. 8-X/Y Thermodynamic CYCLE - Way Steps: 1)1-Compression / bigger 2)2-Turbo 1 cold 3)2-Turbo 2 cold 4)2-Combustion - circular motion flames / opposites 5)2-Thrust - single turbo & planetary gears / ying yang 6)2-Turbo 2 hot 7)2-Turbo 1 hot 8)1-Turbine / bigger -With Retrodynamic Dextrogiro vs Levogiro Phenomenon Effect. / Rotor-RPM VS InFlow / front to front; "Collision-Interaction Type" - inflow vs blades-gear-move. Technical unique dynamic innovative motion mode. [Retrodynamic Reaction = When the inflow have more velocity the rotor have more RPM Acceleration, with high (XY Position) Momentum] Which the internal flow (and rotor) duplicate its speed, when activated being in a rotor (and inflow) with [inverse] opposite Turns. The Reaction at front of the action. A very strong Novel torque power concept. -Non waste parasitic looses for; friction, cooling, lubrication & combustion. -Shape-Mass + Rotary-Motion = Inertia-Dynamic / Form-Function Wide [Flat] Cylindrical shape + positive dynamic rotary mass = continue Inertia positive tendency motion. Kinetic Rotating Mass. Tendency of matter to continue to move. Like a Free-Wheel. -Combustion 2Two continue circular [Rockets] flames. [ying yang] opposite one to the other. – With 2TWO very long distance INFLOW [inside propulsion] CONDUITS. -4 TURBOS Rotary Total Thrust-Power Regeneration Power System. -Mechanical direct 2two [Small] Planetary Gears at polar position. -Like the Ying Yang Symbol/Concept. -The Mechanical Gear Power Thrust Point Wide out the Rotor circumference were have much more lever [HIGH Torque] POWER THRUST. -No blade erosion by sand & very low heat target signature profile. -3 points of power thrust; 1-flow way, 2-gear, 3-turbine. *Patent; Dic. 1991 IMPI Mexico #197187 All Rights Reserved. Carlos Barrera. *2-IMPLOTURBOCOMPRESSOR; One Moving Part System Excellence Design - The InFlow Interaction comes from Macro-Flow and goes to Micro-Flow by Implossion - Only One Compression Step; Inflow, Compression and outflow at one simple circular dynamic motion Concept. https://www.behance.net/gallery/21691891/Imploturbocompressor ·“Excellence in Design" because is only one moving part. Only one unique compression step. Inflow and out flow at the same one system, This invention by its nature a logic and simple conception in the dynamics flow mechanics area. The invention is a wing made of one piece in a rotating motion, contained in a pair cavity system connected by implocavity, and interacting dynamically with a flow, that passes internally "Imploded" through its simple mechanism. This flow can be gas (air) or liquid (water). And have two different applications, in two different form-function; this one can be received (using the dynamic flow passage, as a receiver). Or it can be generated (with a power plant, generating a propulsion). An example cut be, as a Bike needs a chain to work from motor to wheel. And for the Imploturbocompressor application, cut be as; in a circumstance at the engine, as an A-activate flow, and with a a tube flow conduit going to the wheel as a B-receiving-flow the work use. To see a Imploturbocompressor animation, is posible on a simple way, just to check the Hurricane Satellite view, and is the same implo inflow way nature. And when the flow that is received and that is intended to be used at best, must no necessarily by a exhausting or rejection gas, but must be a dynamic passing gas or liquid flow with the only intention to count it or to measure it. This could be possible at the passing and interacting period when it passes inside its simple mechanism. This can be in any point of the work flow trajectory. In case the flow that is received is a water falling by gravity, and a dynamo is placed on the rotary bar, the Imploturbocompressor can profit an be obtained by generating? electricity such as obtained by the pelton well, like I say before. The "Imploturbocompressor", is a good option to pump water, or a gas flow, and all kinds of pipes lines dynamic moves.  Or only receive the air-liquid flow, in order to measure its passage with a counter placed on the bar, because when this flow passes through the simple mechanism of a rotating wing made of only one piece it interacts within the implocavities system. And this flow can be air wind, with the difference of can have an horizontal work position, and that particle technical circumstances make an easy way for urban building work new use application, and have wind flow from all the sides 180 grades view. The aforementioned information about this invention refers to technical applications, such as a dynamic flow receiver. (whether being gas or liquid). With the appropriate power plant and the appropriate dimensioning and number of RPM this invention is also feasible to generate an atmospheric air propulsion and the auto-propulsion of an aircraft. Being an effective and very simple system that implodes and compresses the atmospheric air permits the creation of a new concept of propulsion for aircrafts, due to its simple mechanism and innovative nature. At the place of the aircraft were the system appears and the manner how the propulsion direction can be oriented with a vectorial flow (no lobster tail) with I call "yo-yo system" (middle cut (at the shell) to move, one side loose), guided and balanced is feasible to create a new concept of TOVL-vertical take-off landing, Because the exhaust propulsion can going out radial in all the 360 vectorial positions, going out direct all the time in all the vectors direction. With his rotor cover for an better furtive fly, like going down of a bridge for example. Likewise, with the due form and dimensioning, and considering the liquid density and the due revolutions for this element there could be generated a propulsion (water) in order to move an aquatic ship, whether on surface or under water. Also can be a good option to pump liquid combustion for a rocket propulsion. Making a metaphoric comparison with the intention to expose it more clearly for a better comprehension of this innovative technical detail, it would be similar to the trajectory and motion of a dynamic flow compared with a rope (extended) that passes through the system would have now a knot (without obstructing the flow), so the complete way of the flow at the imploturbocompresor system have three direct ways and between make two different turns; direct way (entrance) - turn - direct way (implocavity) - turn - direct way (exit), all this in a 1 simple circular move system concept. Its prudent to mention that the curves and the inclinations of the blades of a rotating wing made of this invention, is conferred by its shape and function a structural rigidity allowing it to conduct and alter appropriately the dynamic flow passing through its system. 1326 W *Author; Carlos Barrera. Inventor-Individual/Self Taught. Monterrey, NL Mexico 66220. Resume; *State of the Art - Novel InFlow Tech - Featured Project Development; |/ ·1; Rotary-Turbo-InFlow Tech / - GEARTURBINE PROJECT Have the similar basic system of the Aeolipilie Heron Steam Turbine device from Alexandria 10-70 AD * With Retrodynamic = DextroRPM VS LevoInFlow + Ying Yang Way Power Type - Non Waste Looses *8X/Y Thermodynamic CYCLE Way Steps. 4 Turbos, Higher efficient percent. No blade erosion by sand & very low heat target signature Pat:197187IMPI MX Dic1991 Atypical Motor Engine Type. |/·2; Imploturbocompressor; One Moving Part System Excellence Design - The InFlow Interaction comes from Macro-Flow and goes to Micro-Flow by Implossion - Only One Compression Step; Inflow, Compression and outflow at one simple circular dynamic motion / New Concept. To see a Imploturbocompressor animation, is possible on a simple way, just to check an Hurricane Satellite view, and is the same implo inflow way nature. Tags; Aero, aerodynamics, aeolipile, alternative, applied, atypical, bang, blow, change, combustion, compression, compressor, concept, cycle, design, development, device, dynamic, ecological, efficient, electrolysis, emerging, energy, engine, engineering, flow, gear, gearturbine, generator, idea, imploturbocompressor, in, industry, inflow, information, innovation, invention, investigation, jet, mechanical, momentum, motion, motor, new, next, on, paradigm, power, project, propulsion, reaction, research, retrodynamic, rotary, rotor, scientific, shock, squeeze, suck, system, task, tech, technical, technology, thermodynamic, thrust, tip, top, torque, total, transport, trends, turbine, turbo, turbomachinery, type, unconventional, unlike, unpresedent, vtol, wave, weird,           

retrodynamic

retrodynamic

 

SHAPECRUNCH

What if you have an amazing combination of mechanical engineering and biomechanics? Sounds interesting, but much more than that if it could be useful for solving problems of foot pain, it would be really beneficial for a larger societal segment at large. And this is no more an imagination because an amazing team of engineers and foot specialists have brought this unique concept to fit your feet perfectly to relieve foot pain and prevent biomechanics issues. SHAPECRUNCH is an robust team which has brought out the concept of using 3D printed material for making insoles. The top layer is made up of PORON with shock absorbing and antimicrobial features and bottom layer is made up of 3D printed PLA and rubber material which provides support and foot mechanics giving comfort while walking and solves foot problems. You need to just download the SHAPECRUNCH app, scan the foot and fill in the foot bio details. Hence, come up with such amazing ideas which can shape our future as someone has rightly said " A World to be Born under your Footsteps".
 

Invitation for participation in IMF2018

Hello, I'm glad to inform you that IMF'18 is live now and you can register your participation online. As the event is quickly approaching and your early responses would be exciting. Likewise, we are putting our best efforts to make your participation in IMF more worthful. We sincerely hope you will carry back pleasing memories that you can share to inspire your friends and peers. The excitement is growing every week and will feature 5 thematic plenary workshops with more than 50 expert speakers. Plus, we've exclusive session, in fact a half-day working session that will identify the most effective ways to direct policies across some extended domains that needs more wisdom and request your active participation here.    P.S. IMF'18 is the perfect opportunity to bring your entire team to spend on the state-of-the-art trends and opportunities.    Regards, Dr. Muralidhar Lakkanna Secretary,  Inclusive Manufacturing Forum National Institute of Advanced Studies, IISc Campus, Bengaluru - 560 012, India, Phone: + 91 80 22185064 Fax: +91 - 80 – 22185028 www.inclusive-manufacturing.org
 

3D printed aluminium alloy parts

I got my first 3D printed aluminium alloy parts. As the image shows it looks like it’s been manufactured using casting. The 3D printing technology used to print these parts is called Direct Metal Laser Sintering (DMLS). It’s one of many 3D printing technologies available these days  More pictures here
 

Manufacturing Process

Manufacturing processes have come a long  way since the industrial revolution and with the introduction of new technologies such as additive manufacturing, it will only get better and more advance. But as Mechanical and manufacturing engineers ( and Product designers) how well do we know various manufacturing processes available. Are we slowly losing some of the oldest manufacturing techniques.  Test your manufacturing process knowledge here and see how well you understand the different processes.... Manufacturing process survey  

Senthil J Prakash

Senthil J Prakash

 

Three-position synthesis with specific fixed pivots

======================================================================== Adapted from: Kinematics and Dynamics of Machinery by Robert L. Norton. ======================================================================== Download the much better formatted .PDF version from here: LINK ======================================================================== At times the designer would like to design a mechanism that would have to go through three positions. In this case the designer would start with the required three positions of the coupler and would work his way to decide on the location of the two pivot points for the ground link. The location of the two pivot points is not the result of the designer’s choice, but is decided by the geometry of the three positions required. This is not practical; often times the designer is constrained to work with specific pivot points to form the ground link while still achieving the required three positions by the coupler motion. This article discusses one of the simplest methods to go about doing that.     Let’s talk a look at this problem: Figure1: Problem Statement Design fourbar linkage to move the link CD shown between the positions C1D1 to C2D2 and then to C3D3. Use specified fixed pivots O2 and O4.  The first thing we need to do is to “invert” the problem. The way to do this is to think about the coupler (C1D1) as the ground instead and the ground (O2O4) as the coupler. For now we have one ground, (C1D1), and we have only one position for the coupler (O2O4). We are going to find two more positions for the now coupler (O2O4) that would correspond to the two other positions (C2D2). To do this we need to define the relation between The coupler and the ground.  Draw construction arcs from point C2 to O2 and from point D2 to O2 whose Radii define the sides of triangle C2O2D2. This defines the relationship of the fixed pivot O2 to the coupler line CD in the second coupler position. Draw construction arcs from C2 to O4 and from point D2 to O4 to define the triangle C2O4D2. This defines the relationship  of the fixed pivot O4 to the coupler line CD in the second position.   After locking the relative location of O2O4 in relation to the second position C2D2, it is  time to slide this ground, now coupler, to its new location as if it wasn’t the ground but the coupler. That’s to say, we are trying to answer the question: if C1D1 is the ground, where would the coupler, O2O4, be in the second position?   You can imagine this happening by sliding the triangle along the two lines C2C1 and D2D1. This results in a new position for O2’O4’. By doing this, we have pretended that the ground link moved from O2O4 to O2’O4’ instead of the coupler moving from C1D2 to C2D2. We have effectively inverted the problem.  Now we have two positions for the now coupler, O2O4; O2O4 and O2’O4’. We need another third position to correspond with the third position C3D3. To do this, we need to repeat the same process again by defining the relation of the link O2O4  in relation to C3D3 after that we need to shift it back to C1D1 as if the link O2O4 was the coupler not the ground.  Performing this will result in the third position O2’’O4’’. This is the relative location of the link O2O4 in its third position as a coupler in relation to the new ground link C1D1. Now we have three positions for the pretended coupler O2O4. O2O4, O2’O4’ and O2’’O4’’ Right now the problem is fully redefined; we have three positions for the newly decided coupler O2O4 and the link CD in the first location C1D1. We can now rename those three positions O2O4, O2’O4’ and O2’’O4’’ to E1F1, E2F2 and E3F3. We can now deal with the three positions as we would normally solve for three position coupler problem.  First we need to draw the lines E1E2 and E2E3. Then we have to draw the perpendicular bisectors of these lines. The bisectors will intersect in point G. We repeat the same process for point F; draw lines F1F2 and F2F3 then draw the perpendicular bisector of these lines. These two bisectors will intersect in point H. Now we have a fourbar linkage, GEFH, in which the coupler, EF, goes through three positions.  If you recall, EF is not actually our coupler. EF represents our ground O2O4. What we need to do now is to re-invert the problem again to its original form. By switching EF to be the ground link and GH to be the coupler link we reach at this linkage. Now we have our coupler, link GH, that should be connected back to the first position that we wish to achieve; C1D1. By extending link 3, GH, to reach to C1D1 we form our final mechanism that guides the coupler, link 3 (HGCD) through the three required positions. The final thing we need to do is to add a driver Dyad to drive the link O4H. This is simply done by treating O4H as rocker in a crank rocker design problem. The rocker, now O4H, has to pass through H2 and H3 to result in the required motion. Afterwards, the final mechanism is checked for toggle positions and that it can reach the required positions smoothly and in orderly fashion. In conclusion, the designer is not limited to the resulting fixed pivots for the solution of three positions coupler problems. By using the illustrated method, the design can specify the required fixed pivots and the required coupler motion and work his way around to getting those two requirements achieved. Adapted from: Kinematics and Dynamics of Machinery by Robert L. Norton.

M.Shehata91

M.Shehata91

 

LightSail Energy

LightSail Energy is one of the most eminent startups that hails from Silicon Valley founded by Danielle Fong, Steve Crane, and Ed Berlin in 2009. LightSail Energy has the concept of low-cost grid-scale energy storage solution in order to optimise power grids, democratizing access to energy and adhere on sustainable development. Investors such as Khosla Ventures, Innovacorp, Triple Point Capital, Peter Thiel, Bill Gates have invested in LightSail Energy. LightSail Energy produces one of the world cleanest and economical storage systems.The website of the startup is http://www.lightsail.com/  They have designed an excellent method of capturing heat energy and regenerating useful energy from compressing air. The process involves injecting fine, a dense mist of water spray which rapidly absorbs heat energy of compression and provides it during expansion. The system is fully reversible. To store energy, the system draws electricity from the grid and converts it into compressed air and heat. To deliver energy, compressed air and heat are turned back into electricity using the same system. The system has 300+ hours of operation, 10 degrees Celcius temperature difference, 1000 rpm reciprocating piston compressor/expander and 250 KW highest power achieved. For low-cost storage, air is packed in a convenient shipping container and for large storage, underground caverns are used. This way of storing energy could be helpful in transforming intermittent wind and solar power into baseload energy.     

Shalini Chakraborty

Shalini Chakraborty

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