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Hydraulic Radial Piston Pumps

Figure 4-11 illustrates the operation of the radial piston pump. The pump consists of a pintle, which remains stationary and acts as a valve; a cylinder block, which revolves around the pintle and contains the cylinders in which the pistons … Continue reading

24. July 2019 by Jack
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Hydraulic Combination Pumps

Many hydraulic applications are similar to Figure 2.16, where a workpiece is held in place by a hydraulic ram. There are essentially two distinct requirements for this operation. As the cylinder extends or retracts a large volume of fluid is … Continue reading

23. July 2019 by Jack
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Hydraulic Axial Piston Pumps

In axial piston pumps of the in-line type, where the cylinders and the drive shaft are parallel (fig. 4-13), the reciprocating motion is created by a cam plate, also known as a wobble plate, tilting plate, or swash plate. This … Continue reading

20. July 2019 by Jack
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Rack and Pinion Rotary Actuator

referred to as limited rotation cylinders, of the single or multiple, bidirectional piston are used for turning, positioning, steering, opening and closing, swinging, or any other mechanical function involving restricted rotation. Figure 10-10 shows a typical rack-and-pinion double piston actuator. … Continue reading

14. July 2019 by Jack
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Hydraulic Stratopower Pump

Another type of axial piston pump, sometimes referred to as an in-line pump, is commonly referred to as a Stratopower pump. This pump is available in either the fixed-displacement type or the variable-displacement type. Two major functions are performed by … Continue reading

14. June 2019 by Jack
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Hydraulic Hand Pump

There are two types of manually operated reciprocating pumps—the single-action and the double-action. The single- action pump provides flow during every other stroke, while the double-action provides flow during each stroke. Single-action pumps are frequently used in hydraulic jacks. A … Continue reading

26. June 2011 by Jack
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Hydraulic Reciprocating Pump

The term reciprocating is defined as back-and forth motion. In the reciprocating pump it is this back-and-forth motion of pistons inside of cylinders that provides the flow of fluid. Reciprocating pumps, like rotary pumps, operate on the positive principle—that is, … Continue reading

14. January 2011 by Jack
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Hydraulic Screw Pump

Screw pumps for power transmission systems are generally used only on submarines. Although low in efficiency and expensive, the screw pump is suitable for high pressures (3000 psi), and delivers fluid with little noise or pressure pulsation. Screw pumps are … Continue reading

14. January 2011 by Jack
Categories: Hydraulic Pumps and Pressure Regulation | Tags: | 1 comment

Hydraulic Lobe Pump

The lobe operation as pump uses the same principle of the external gear pump described previously. The lobes are considerably larger than gear teeth, but there are only two or three lobes on each rotor. A three-lobe pump is illustrated … Continue reading

14. January 2011 by Jack
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Centered Internal Gear Pump

Another design of internal gear pump is illustrated in figures 4-5 and 4-6. This pump consists of a pair of gear-shaped elements, one within the other, located in the pump chamber. The inner gear is connected to the drive shaft … Continue reading

14. January 2011 by Jack
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