Chapter 7 (Check valve, Cylinders and motors Flashcards
Component which allows flow in only one direction
Check valve
The most common pneumatic actuator is a ______.
Cylinder
Converts fluid power energy into straight line mechanical energy
Cylinder
3 parts a pneumatic cylinder are made up of:
1) Cylinder body
2) Moveable piston
3) Piston rod
For proper operation of a cylinder, a _____ ____ and ____ ____ must be present
Positive seal
Rod gland
Keeps pressure inside cylinder
Primary seal
Keeps dirt off rod and provides a small amount of lubrication
Wiper seal
4 ways a cylinder can be mounted:
1) Clevis
2) Trunnion Mount
3) Flange mount
4) Side lug
A load being pushed by a cylinder
Thrust
A load being pulled by a cylinder
Tension
6 common types of cylinders:
1) Single acting
2) Double acting (most common)
3) Single rod
4) Double rod
5) Spring returned
6) Ram (Porta power)
Collapse of a rod at or above capacity
Buckling
Slows down a cylinders piston movement just before reaching the end of its stroke
Cushion
What’s the purpose of a cushion?
Slows down a pistons movement just before reaching the end of the stroke
Pneumatic motor that converts the potential energy of compressed air into rotary mechanical energy
Rotary motor
Two basic Hydrostatic motors:
1) Piston
2) Vane
How does a check valve work?
When system pressure overcomes the spring force on a poppet, the poppet is moved off its seat and allows air to pass
The piston inside the cylinder would be considered the?
Blind end
The rod outside the cylinder would be considered the?
Rod end
A cylinder with ports on each end and a rod on both ends
Double acting double rod
2 reasons why a cylinder would fail while retracting?
1) Piston breaks off rod
2) Rod threads shear off
What happens if a piston seal fails?
Lose force
_____ and _____ is always applied to the smallest volume of area in a motor to make it rotate.
Flow and pressure
Common check valves operate at ____ psi.
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