A double-distribution self-adaptive rectangular plunger pump motor with integrated plunger

Abstract

The invention discloses a double-distribution self-adaptive rectangular plunger pump motor adopting an integrated plunger, comprising an eccentric housing, a first distribution end cover, a second distribution end cover, a transmission shaft, a cylinder body and an integrated rectangular plunger , the one-piece rectangular plunger includes a rectangular plunger, a friction ring and a roller; the invention improves the structure of the cylinder body, the structure of the plunger and the flow distribution method, and adopts the one-piece rectangular plunger to combine the frictional movement of the rectangular plunger and the eccentric cavity Converted to the movement of the roller and the eccentric cavity, while the rectangular plunger and the friction ring are almost in a relatively static state, which greatly reduces wear; the double flow distribution method is adopted to transfer the oil from the first distribution end cover and the second distribution end Equal suction and discharge on both sides of the cover balance the oil pressure well. The cylinder body can realize self-adaptive position adjustment in the eccentric housing, better realize the oil film lubrication of the distribution pair, and increase the distribution area at the same time, reduce the The overturning of the cylinder body is prevented, the rotation stability is improved, and the service life of the pump motor is extended.

Description

technical field [0001] The invention relates to the technical field of pump motors, in particular to a double-distribution self-adaptive rectangular plunger pump motor adopting an integrated plunger. Background technique [0002] Piston pump motor, plunger pump motor has the advantages of high working pressure, high power density, simple and compact structure and high efficiency. It relies on the reciprocating movement of the plunger in the cylinder to change the volume of the sealed working chamber to realize oil absorption and oil pressure. It is widely used in aerospace, construction machinery, ships and robots and other fields. [0003] With the development of servo actuation technology, the pump motor mechanism with wide speed regulation and wide pressure range has become the core content of volumetric servo control. Axial piston pumps have higher efficiency in the range of higher speed and rated working pressure. When working at low speed, because the distribution pa...

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Problems solved by technology

[0006] First, due to the high-speed and high-frequency rotation of the internal cylinder, the wear of the rectangular piston and the inner wall of the eccentric cavity is serious, and the service life of the rectangular plunger is greatly reduced;

[0007] Second, due to the one-way oil supply and flow distribution method, the hydraulic separation force generated during the flow distribution process is balanced by the axial force of the bearing. At the same time, the symmetrical arrangement of the high pressure chamber and the low pressure chamber produces a flow from the high pressure side to the low pressure side of the cylinder. The overturning moment affects the smooth operation of the cylinder under high-speed and high-pressure conditions, and also affects its service life

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