Fluid Power Week 5 Flashcards
What is a check valve?
Valve which allows flow in only 1 direction. Held by a spring (typically requires 5PSI to open)
What is a cylinder used for?
Converts fluid power energy into Straight-Line Mechanical Energy
What is the primary purpose for all cylinder seals?
Allow the piston to pressurize.
What is the Primary seal used for?
Keeps the fluid from rushing out of the cylinder around the rod.
What is the wiper seal for?
Clean and lubricate the rod.
What is the end of the cylinder opposite of the rod?
Blind end.
What is the end called on the cylinder on the side of the rod?
Rod end.
What is the load called when the rod extends?
Thrust Load.
What damage can occur when the cylinder rod extends?
Rod buckle.
What damage can occur when the cylinder rod retracts? (Tension Load)
Ripped threads
What are the 4 methods of cylinder mounting?
Cap Fixed Clevis
Head Trunnion
Cap Square Flange
Side Lugs
Which cylinder has 1 threaded rod and moves in 1 direction?
Single Acting
Which cylinder uses alternating pressure to move the piston both directions?
Double Acting
Which cylinder has 2 separate rods which move both directions.
Double acting double rod
What is a cushion valve?
Valve which slows the piston at the end of the stroke to eliminate shock.
What do pneumatic motors do?
Convert potential energy of compressed air into Rotary Mechanical Energy.
What are the 2 basic hydrostatic motors?
Piston and Vane
On a motor, what does a empty energy triangle denote?
Pneumatic (Air)
On a motor, what does 1 energy triangle denote?
1 directional motor
On a motor, what do 2 energy triangle denote?
Bidirectional motor (2 directions)
What is an orifice?
Restriction on flow path.
What 3 things effect flow through and orifice?
Size of orifice, pressure drop, and viscosity.
What are the 2 types of orifices?
Fixed and Adjustable (Such as needle valves)
What is a quick exhaust valve?
Control valves which increases exhaust flow as well as rod speed.
What is the main characteristic of mufflers?
No restriction to flow, unless they are dirty.
What is a Ram Cylinder
Cylinder in which the movable element is the piston rod. Example is a Porta Power Jack
A Muffler should provide:
•Low resistance to flow
•Sound suppression
•Corrosion resistance
