Tag Archives for Hydraulic

Hydraulic Gerotor Pump Efficiency

Overall efficiency accounts for the loss of mechanical energy due to friction, and the loss of hydraulic energy due to the leakage flow. The clearances between moving parts can be thought of as an orifice. Fluid on one side of … Continue reading

26. December 2009 by Jack
Categories: Hydraulic Pressure Control | Tags: , , | Leave a comment

Load Sensing Efficiency Improvement

Load sensing was developed to improve the efficiency of a circuit. It requires a variable displacement pump; thus, it is appropriate to discuss it here. An example will illustrate the advantage provided by load sensing. An application requires a maximum … Continue reading

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

Hydraulic Radial Piston Pump

The principle of operation of the radial piston pump is shown in Fig. 4.16. In this case, the cylinders are positioned radially around the axis of rotation. As the shaft rotates, the connecting rods push the pistons back and forth … Continue reading

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

Hydraulic Axial Piston Pump

The axial piston pump has a series of cylinders (typically 7 or 9) mounted parallel to the axis of rotation. (The arrangement is similar to shell chambers in a revolver.) Pistons are installed in the cylinders. Each piston has a … Continue reading

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

Hydraulic Vane Pump Basic Operation

A vane pump (Fig. 4.7) has a series of vanes that slide back and forth in slots. There are springs in these slots that push the vanes out until the tip contacts the cam ring. (Some designs port pressurized fluid … Continue reading

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

Fixed Displacement Pump Hydraulic Circuits

A simple circuit with fixed displacement pump is shown in Fig. 4.3. Circuits with fixed displacement pumps are called constant-flow circuits. The key concept is stated below. Each revolution of a fixed displacement pump delivers a certain volume of fluid … Continue reading

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