9ExampleOil delivered from a pump at 18.2gpm. Cylinder bore = 3”. Piston has 1” diameter cushion plunger, 0.75” in length. Piston driving a 1500lb weight in horizontal direction; coefficient of sliding friction, , is Pressure relief valve set at 750psi. Determine p2, pressure in the cushion chamber.
10ExampleWhat force is needed to lift 6000lb load in a direction 30o from horizontal?
15Rotary Actuator Requirements A driving surface subject to a differential pressurePorts to direct fluid to driving surface to obtain rotation and to exit the motorA mechanical connection between surfaces and output shaft
16Hydraulic motors Oscillating motor Continuous motor Bidirectional Fixed or variable displacementGearVanePiston
17Hydraulic motor performance TorquePowerMotor speedOverall efficiency