Category Archives for Hydraulic Pumps

Yuken Axial Piston Pumps

These pumps have pistons installed in parallel, or axially, with the pump shaft. The pumps are subcategorized into the swash plate type and the bent axis type according to the piston stroke mechanism, as shown in Figs. 2.1 and 2.2. … Continue reading

31. May 2018 by Dan
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Piston Pumps

These pumps assure high performance in high pressure operation, compared to the other types, and are easy to convert to the variable displacement type. Thus, they can operate with various control types. The piston pumps provide advantages including: (1) high … Continue reading

31. May 2018 by Dan
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Variable Displacement Pump Flow and Pressure Characteristics

Generally, the flow and pressure characteristics of variable-displacement pumps are given as constants assuming linear characteristics. As stated before, for high-pressure operation with low-viscosity fluids, the pump characteristics may become more nonlinear. In this case, the nonlinearities should be considered … Continue reading

22. July 2013 by Jack
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Variable Displacement Pump Leakage Characteristics

If the pump is driven at constant speed, the flow from the pump is directly proportional to the pump stroke. The output pressure or discharge pressure from the pump is determined by the load or the restriction to the pump … Continue reading

22. July 2013 by Jack
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VARIABLE-DISPLACEMENT PUMPS

In servo control systems, the variable-displacement or servo pump performs the same basic function as the control valve. However, the servo pump generates the controlled fluid power as demanded in response to an input control signal. In most applications, the … Continue reading

22. July 2013 by Jack
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Gearboxes Hydraulic Pump Mounts

Hydraulic pump mounts are gearboxes that are designed to drive the pumps. These gearboxes have one input and provide connections for mounting one to four pumps on the output side. Mounts can be equipped with clutches and available for different … Continue reading

01. November 2012 by JackSparow
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Multiple Hydraulic Pump Circuits

The multiple hydraulic pump types install two or more pumps in the same housing and use a single shaft to drive. Each pump has its own outlet although in some application one inlet is provided. The pump shown in figure … Continue reading

31. October 2012 by JackSparow
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Hydraulic Vane Pump Volumetric Efficiency

Vickers Pump Model 25V-T is a hydraulic vane pump which has a 4.81 in3/rev displacement with max speed 1800 rpm and max pressure 2500 psi. The vane pump volumetric efficiency at 1200 rpm decreases from 97.3% at 500 psi to … Continue reading

31. October 2012 by JackSparow
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Hydraulic Gerotor Pump Volumetric Efficiency Characteristic

Hydreco Model 1919 is a gerotor hydraulic pump with 4.53 in3/rev displacement. The pump has maximum speed of 3000 rpm with 2500 psi maximum pressure. The pump volumetric efficiency drops from 92% at 500 psi to 78% at 2500 psi … Continue reading

29. October 2012 by JackSparow
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Hydraulic Variable Displacement Pump

An expensive hydraulic variable displacement pump offers many options for hydraulic circuit design. The pump displacement can be changed using a servo valve to manipulate the actuator speed movement. The open loop hydraulic design as shown in figure above can … Continue reading

29. October 2012 by JackSparow
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