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Mechanical Engineering

HydraBob

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  1. A centrifugal pump can tolerate some cavitation. Centrifugal compressors can pressurize air but a very low pressure centrifugal "air pump" is called a blower and if often found in heating, ventilation and air conditioning systems. Using an impeller which was designed to move liquids would be very inefficient when moving a gas.
  2. The rectangular link is restrained in a track or slot to produce only motion in the X direction. There's also the mechanism with a member that has a slot in it to accept the cam. Both have good deceleration and acceleration in the X direction.
  3. If link 2 and 4 are the same length, the mechanism is unstable at 0° and 180°. It's possible for the mechanism to "invert" at those locations. When that happens, link will no longer be horizontal.
  4. trust but verify Mathematical models should be validated when possible / practical
  5. I agree with DrD and believe the real challenge is the telescopic arm. Along the way, consider a displacement amplifier similar to a forklift mast. The cylinder only moves half as far as the carriage. The displacement is doubled but so is the speed.
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