Robotics Chapter 6 Review Questions

Topics: Pump, Vacuum, Fluid dynamics Pages: 4 (952 words) Published: June 28, 2014
Robotics Theory and Industrial Applications Second Edition Chapter 6 Answers

1) In a fluid power system the energy moves along the transmission path from the electrical motor to the pump. Fluid enters the pump at the inlet port and is forced through the outlet port. The fluid can undergo a multiplication of force activating on a load much larger than the point of origin. This fluid continues along the transmission path to the load. Basically, they use air or liquid, or a combination of both, to transfer power.

Some industrial applications are automated manufacturing machinery to power hand tools. High pressure hydraulic fluid can be transmitted through a network of hoses to operate motors, actuators, and cylinders which then cause a robot to operate.

2) The energy source (electric motor or combustion engine) powers a compressor which forces conditioned air into a pressurized storage tank (which serves as the system reservoir). Constant pressure, maintained by pressure regulator valve, is automatically adjusted by motor-driven air compressors during system operation. No return lines to a storage tank like hydraulic systems, air is vented to atmosphere. The load device in this system changes the mechanical energy of air into linear or rotary motion.

Punch-press ram uses an air cylinder; grinders, buffers, drills, and impact wrenches produce rotary motion.

3) Pressure regulator – in a pneumatic system the air must be maintained during system operation at a specific level. Motor-driven air compressors automatically start whenever the pressure in the storage tank drops below a certain level. (p.143)

4) Pascal’s law – a principle of fluid properties that states when pressure is applied to a confined fluid, the pressure is transmitted, undiminished, throughout the fluid. Additionally, this pressure acts on all surfaces of the container, at right angles to those surfaces. Discovered by French scientist Blaise Pascal in 1653.

5) Force – any...
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