Tag Archives for Hydraulic pump

Hydraulic Pump Slippage

Slippage is oil leaking from a pressure outlet to a low-pressure area or back to an inlet. A drain passage allows leaking oil to return to an inlet or a reservoir. Some slippage is designed into pumps for lubrication purposes. … Continue reading

12. January 2011 by Jack
Categories: Hydraulic Pumps and Pressure Regulation | Tags: , | Leave a comment

Hydraulic Pump Displacement

Displacement is the amount of liquid transferred from a pump’s inlet to its outlet in one revolution or cycle. In a rotary pump, displacement is expressed in cubic inches per revolution and in a reciprocating pump in cubic inches per … Continue reading

12. January 2011 by Jack
Categories: Hydraulic Pumps and Pressure Regulation | Tags: , , , | Leave a comment

Hydraulic Pump Performance

Pumps are usually rated according to their volumetric output and pressure. Volumetric output (delivery rate or capacity) is the amount of liquid that a pump can deliver at its outlet port per unit of time at a given drive speed, … Continue reading

12. January 2011 by Jack
Categories: Hydraulic Pressure Control | Tags: , | Leave a comment

Hydraulic Pump Operation Principle

The sole purpose of a pump in a hydraulic system is to provide flow. A pump, which is the heart of a hydraulic system, converts mechanical energy, which is primarily rotational power from an electric motor or engine, into hydraulic … Continue reading

22. December 2010 by Jack
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Hydraulic Pump Mounts

Pump mounts are gearboxes that are designed to power hydraulic pumps. These gearboxes have one input and provisions for mounting one to four pumps on the output side (Fig. 4.30). Mounts are available with or without clutches, and different gear … Continue reading

26. January 2010 by Jack
Categories: Creation and Control of Fluid Flow | Tags: , | Leave a comment

Hydraulic Gerotor Pump Performance

The Hydreco Model 1919 gerotor pump has a displacement of 4.53 in3/rev. The manufacturer gives performance data up to a maximum speed of 3000 rpm. The maximum pressure curve is 2500 psi. When driven at 1200 rpm, the volumetric efficiency … Continue reading

26. December 2009 by Jack
Categories: Creation and Control of Fluid Flow | Tags: , , | Leave a comment

Variable Displacement Pump Hydraulic Circuits

Variable displacement pump circuits are called demand flow circuits. A simple example is shown in Fig. 4.6. (The astute reader will quickly observe that this circuit is the first circuit we have studied with no relief valve. Although no relief … Continue reading

25. December 2009 by Jack
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Hydraulic Fixed Displacement Pump Basic Principle

Vane and piston pumps are available as fixed or variable displacement pumps. If the cam ring is fixed in position (vane pump), or the swashplate is fixed in position (piston pump), the displacement is fixed. Gear pumps, however, are available … Continue reading

25. December 2009 by Jack
Categories: Creation and Control of Fluid Flow | Tags: , , , | Leave a comment