Swashplate rotary axial piston pump with built-in valve distribution

Abstract

The invention discloses an inclined-disc-rotating internally-disposed valve flow distribution axial plunger pump which comprises a front end cap, a front pump body, a pump shaft, a bearing component, a sealing component, a rear pump body, an inclined disc, a plunger sliding shoe component, a return spring, a cylinder body, a suction valve set, a rear end cap and an extrusion valve set. The pump shaft is arranged in the front pump body, the bearing component is mounted in the pump shaft, the inclined disc is mounted in the rear pump body, the suction valve set is mounted in the cylinder body, the extrusion valve set is mounted in the rear end cap, the pump shaft drives the inclined disc to rotate through a spline and jointly bears axial force and radial force of the inclined disc through a thrust bearing and a deep groove ball bearing, the cylinder body is fixed on the rear pump body and is relatively static, and the suction valve set and the extrusion valve set are mounted at the tail of the cylinder body and the rear end cap respectively. The inclined-disc-rotating internally-disposed valve flow distribution axial plunger pump is simple in structure, convenient to maintain, higher in specific power and performance-cost ratio, high in anti-fouling performance and especially suitable for high-pressure water pumps, leakage of the plunger pump is reduced effectively, and working pressure and volume efficiency are improved.

Description

Technical field [0001] The invention relates to the field of hydraulic pumps, in particular to an axial plunger pump with a swash plate rotation type built-in valve distribution valve. Background technique [0002] With the development of hydraulic pumps in the direction of high speed, high pressure and energy saving, the research on axial piston pumps has become more and more extensive. The axial piston pump has the advantages of compact structure, small unit power volume, light weight, higher pressure than other hydraulic pumps, and long life. However, the disadvantages are sensitivity to oil pollution, high requirements for oil filtering accuracy, and high cost. The existing researches on axial piston pumps are mainly divided into three types: end flow distribution, valve flow distribution and shaft flow distribution. The end face distribution relies on the valve plate to separate the high pressure cavity and the low pressure cavity. Both the end face distribution and the sha...

AI Technical Summary

Problems solved by technology

The axial piston pump has the advantages of compact structure, small volume per unit power, light weight, high pressure and long life compared with other hydraulic pumps, but the disadvantages are that it is sensitive to oil pollution, requires high oil filtration accuracy, and high cost.

[0003] At present, the existing valve distribution axial piston pumps can be divided into swash plate rotary type and cylinder rotary type, among which the cylinder rotary type is mainly used, and the main shaft drives the cylinder to rotate through the spline connection, which inevitably makes The machining of the cylinder body is complicated, the arrangement of the distribution valve group is complex and difficult, and the price increases; the swash plate rotary type is mainly used in bent axis pumps, and the swash plate rotary piston pump reduces the internal load, making the starting torque lower and the service life longer

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