Rishabh Pandey

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About Rishabh Pandey

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  • Birthday 07/26/1995

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    Bhiwadi, alwar
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  • Engineering Qualification
    Mechanical engineer
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    Sktc engineering college jaipur

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    Autocad certified

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  1. A brake which uses air as a working fluid is known as pneumatic brake. The system actuated to apply this phenomenon is know as pneumatic brake system. An pneumatic brake system or a compressed air brake system is a type of friction brake for vehicles in which compressed air pressing on a piston is used to apply the pressure to the brake pad needed to stop the vehicle. Construction of pneumatic braking system The simplest air brake system consists of An air compressor A brake valve series of brake chambers at the wheels unloader valve A pressure gauge and a safety valve and an air reservoir. These are all connected by tubes. Some air braking systems may have additional components such as stop light switch low pressure indicator An air supply valve to supply air for tyre inflation A quick release air quickly from the front brake chambers when the brake pedal is released A limiting valve for limiting the maximum pressure in the front brake chambers and a relay valve to help in quick admission and release of air from the rear brake chambers. Working of pneumatic braking system The air compressor operated by the engine forces air at a pressure of 9-10 kscm (kilo standard cubic meters) through the water and oil separator to the air reservoir. The air pressure in the reservoir is indicated by a pressure gauge. The reservoir contains enough compressed air for several braking operations. From the reservoir the air is supplied to the brake valve. As long as brake pedal is not depressed, brake valves stop the passage of air to brake chambers and there is no braking effect. When the brake pedal is depressed, the brake valves varies its position and compressed air is admitted into the wheel brake chambers. In the chambers the air acts upon flexible diaphragms, moves them the pushes out the rods connected with the levers of the brake gear cams. The cams turn and separate the shoes thus braking the wheels. When the brake pedal is released, the supply of compressed air is cut off from the brake chambers and they are connected to the atmosphere. The pressure in the chambers drops, the brake shoes are returned to their initial position and the wheels run free. The brake valve is equipped with a servo mechanism which ensures that the braking force on the shoes is proportional to the force applied to the pedal. Besides the valve imparts a relative reaction to the movement of the pedal so that the driver can sense the degree of brake application. IMAGE SOURCE :- google
  2. Automobile engineering images

  3. pressure gauge.jpg

    Thank you so much for your review. I will take care of it next time
  4. I want to know the main difference between CATIA and SOLIDWORKS to decide which one to learn.
  5. The boiler system comprises a feed-water system, steam system, and fuel system. The feed-water system supplies treated water to the boiler and regulate it automatically to meet the steam demand. Various valves and controls are provided to access for maintenance and monitoring. The steam system heats and vaporizes the feed water and controls steam produced in the boiler. Steam is directed through a piping system to the application. Throughout the system, steam pressure is regulated using valves and monitored with steam pressure gauges. The fuel system consists of all equipment used to supply of fuel to generate the necessary heat. The equipment required in the fuel system depends on the type of fuel used in the system. Boilers Classification: There are a large number of boiler designs, but boilers can be classified according to the following criteria: 1. According to Relative Passage of water and hot gases: Water Tube Boiler: A boiler in which the water flows through some small tubes which are surrounded by hot combustion gases, e.g., Babcock and Wilcox, Stirling, Benson boilers, etc. Fire-tube Boiler: The hot combustion gases pass through the boiler tubes, which are surrounded by water, e.g., Lancashire, Cochran, locomotive boilers, etc. 2. According to Water Circulation Arrangement: Natural Circulation: Water circulates in the boiler due to density difference of hot and water, e.g., Babcock and Wilcox boilers, Lancashire boilers, Cochran, locomotive boilers, etc. Forced Circulation: A water pump forces the water along its path, therefore, the steam generation rate increases, Eg: Benson, La Mont, Velox boilers, etc. 3. According to the Use: Stationary Boiler: These boilers are used for power plants or processes steam in plants. Portable Boiler: These are small units of mobile and are used for temporary uses at the sites. Locomotive: These are specially designed boilers. They produce steam to drive railway engines. Marine Boiler: These are used on ships. 4. According to Position of the Boilers: Horizontal, inclined or vertical boilers 5. According to the Position of Furnace Internally fired: The furnace is located inside the shell, e.g., Cochran, Lancashire boilers, etc. Externally fired: The furnace is located outside the boiler shell, e.g., Babcock and Wilcox, Stirling boilers, etc. 6. According to Pressure of steam generated Low-pressure boiler: a boiler which produces steam at a pressure of 15-20 bar is called a low-pressure boiler. This steam is used for process heating. Medium-pressure boiler: It has a working pressure of steam from 20 bars to 80 bars and is used for power generation or combined use of power generation and process heating. High-pressure boiler: It produces steam at a pressure of more than 80 bars. Sub-critical boiler: If a boiler produces steam at a pressure which is less than the critical pressure, it is called as a subcritical boiler. Supercritical boiler: These boilers provide steam at a pressure greater than the critical pressure. These boilers do not have an evaporator and the water directly flashes into steam, and thus they are called once through boilers. 7. According to charge in the furnace. Pulverized fuel, Supercharged fuel and Fluidized bed combustion boilers.
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    An introduction of mechanisms and machines
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