Pumps/Actuators B Flashcards Preview

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Flashcards in Pumps/Actuators B Deck (15)
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1
Q

Spring Return single acting

A
  • air usually

- requires a drain port

2
Q

Double acting cylinder

A
  • 2 pressure points
  • differential because they have equal pressure on each side of the piston, but faster on retraction because area is smaller on retraction
3
Q

Double Rod Cylinder

A
  • non differential produce equal force

- can push and pull simultaneously

4
Q

Tandem cylinder

A
  • high force short stroke

- two pressure ports

5
Q

Cylinder Cushion

A

-prevents mechanical shock with a needle valve (metering out) to control the last bit of extension

6
Q

Stop Tubes

A

-used to reduce side load on cylinder Rod

7
Q

Rod Support

A
  • used to provide more rigidity for longer strokes

- prevents excessive cylinder deflection and buckling

8
Q

Ports

A

-recommended port is O-ring boss (ORB)

9
Q

Bleed ports

A

-a way to removed entrapped air

-

10
Q

Vane Motors

A
  • without centrifugal force of drive, vane motors require springs under the vanes
  • displacement flow can vary by shifting of cam ring
11
Q

In line axial piston motor

A
  • identical to pump except port size of inlet and exhaust are same size to allow for dual rotation
  • high torque/low speed swash plate is on a greater angle
12
Q

Radial piston motor

A

-a LSHT motor used in severe service

13
Q

Cylinder Installation

A
  • prevent dirt from entering the cylinder
  • ensure the cylinder is accurately aligned with the load
  • ensure its anchored
  • fill the cylinder with system fluid and tighten the hose
  • watch for hot spots which cause internal leakage on the piston ring
14
Q

Telescopic Cylinder

A

-

15
Q

Torque

A
  • inlet pressure
  • surface area
  • radius of rotation