Asymmetrical axial piston pump for torque balancing and shock mitigation

Abstract

The invention discloses an asymmetric axial plunger pump capable of balancing torque and relieving impact. The pump comprises a valve plate with four oil distribution ports and a pump cover with the corresponding structure, the valve plate is provided with one oil distribution suction port and the three oil distribution drainage ports, and the pump cover is correspondingly provided with a oil suction inlet and three oil drainage outlets. According to the asymmetric axial plunger pump capable of balancing torque and relieving impact, on the condition that the pump body structure is not changed,instantaneous pressure impact produced when a plunger cavity is connected with a damping groove at the front end of the oil drainage ports can be relieved, a plunger skid shoe assembly is prevented from producing the unbalance one-way torque effect on a variable inclined plate, and therefore the variable performance of the asymmetric axial plunger pump is improved.

Description

technical field [0001] The invention belongs to the technical field of axial plunger pumps, in particular to an asymmetrical axial plunger pump capable of balancing torque and alleviating impact. Background technique [0002] The closed pump control single piston rod cylinder system has the advantages of simple structure, small size and high efficiency, and has been popularized and applied in the fields of industrial equipment, walking machinery, and aerospace. Among them, the asymmetric axial piston pump is the core of the closed pump control single piston rod cylinder system. [0003] Asymmetrical axial piston pumps are divided into series type (cylinder with single row of plungers) and parallel type (cylinder with double row of plungers). The transition area between the two independent oil suction and discharge distribution windows of the valve plate is located in the area where the plunger descends faster, so it will not only generate a large pressure shock during its o...

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Problems solved by technology

[0003] Asymmetrical axial piston pumps are divided into series type (cylinder with single row of plungers) and parallel type (cylinder with double row of plungers). The transition area between the two independent oil suction and discharge distribution windows of the valve plate is located in the area where the plunger descends faster, so it will not only generate a large pressure shock during its operation, but also reduce the pressure of the asymmetrical axial piston pump. In addition, the resultant force point of the plunger shoe assembly on the swash plate of the axial piston pump is always on one side of the swash plate shaft, so that the swash plate is subjected to one-way torque, and a large-diameter variable cylinder is required to balance it. The variable resistance torque reduces the response performance of the asymmetric variable piston pump; the structure of the asymmetrical axial piston pump with double-row plungers is complex, and the structure of the parallel suction and discharge oil flow distribution window greatly reduces the response performance of the axial piston pump. The area of ​​the suction and discharge port of the distribution plate will cause problems such as poor pump suction and discharge, and large resistance.

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