What are the features of Rexroth variable displacement piston pumps?

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Rexroth variable piston pumps account for the majority of the Rexroth piston pump portfolio. As technology advances at an increasing pace, customers have higher and higher expectations regarding piston pumps. Piston pumps can be divided into variable-displacement and fixed-displacement types, and in order to meet customers’ needs for adjusting the displacement at any time, Rexroth has never ceased its research and development of variable-displacement pumps. This article will introduce the features of Rexroth variable piston pumps Why are they so popular among customers? 　　We describe the various characteristics of Rexroth variable piston pumps using the following statements: 1. Swashplate-type axial piston variable pumps, used for closed-loop hydrostatic transmission ； 　　2. The flow rate is proportional to the drive speed and displacement, and can vary continuously ； 　　3. The flow rate increases from zero to its maximum value as the swash plate angle increases ； 　　4. Moving the swash plate past the neutral position allows for a smooth change in the direction of fluid flow ； 　　5. Multiple variable options that are easy to integrate with various control and regulation systems ； 　　6. The pump is equipped with two relief valves on the high-pressure oil side to protect the hydrostatic drive (pump and motor) from overload ； 　　7. The high-pressure relief valve also serves as an oil filler valve ； 　　8. An internal auxiliary pump is used as an oil filling pump and a control pump ； 　　9. The maximum oil filling pressure is limited by a built-in oil filling relief valve ； 　　10. The entire series is equipped with a built-in pressure cut-off valve. 　　Typical applications of the Rexroth variable piston pump series: concrete pump trucks, heavy-duty hydraulic flatbed trucks, hydraulic pumping stations. 　　Oil supply and self-priming of Rexroth variable piston pumps: Rexroth piston pumps have a certain degree of self-priming capability, but the priming height should not exceed 500 mm. It is strictly prohibited to install filters on the suction pipeline, and the diameter of this pipeline must be at least the recommended value. Additionally, when priming, the pump must first be set to its full displacement angle. 　　When the rotational speed exceeds 1500 rpm, oil supply is recommended, with an oil supply pressure of around 0.7 MPa. In an open system, the flow rate of the oil supply pump should be 130% of that of the pump itself, while in a closed system, it should be 35% of the pump’s flow rate. 　　Its excellent performance and easy-to-control variable parameters – all these advantages have established the Rexroth variable piston pump’s position in the world of piston pumps. The editor is looking forward to the development of Rexroth variable piston pumps and any future changes!