Axial piston pump

Abstract

The invention discloses a novel axial plunger pump which comprises an end cover, a front shell, a rear shell, a pump shaft, a port plate, a swash plate and a cylinder block. The swash plate and the cylinder block are mounted in the rear shell. A cross-shaped wobble plate and plunger components are arranged in a plunger pump body. Plunger holes are formed in the cylinder block. One end of each plunger component is embedded in the corresponding plunger hole, and the other end of each plunger component is connected with the cross-shaped wobble plate. The cross-shaped wobble plate abuts against the swash plate. The cross-shaped wobble plate comprises an inner wobble plate body and an outer wobble plate body. The inner wobble plate body is rotatably connected with the outer wobble plate body through an inner wobble plate body fixing sleeve. The outer wobble plate body is rotatably connected with the cylinder block through an outer wobble plate body fixing sleeve. Sliding shoe holes are formed in the inner wobble plate body. Sliding shoes are connected with the plunger components and can move in a reciprocating mode in the axial direction of the cross-shaped wobble plate. According to a sliding shoe disc of the novel axial plunger pump, a return stroke disc and the sliding shoes in the prior art are embedded together and the sliding shoes and plunger balls in the prior art are embedded together; the radial force of the cylinder block and a plunger base is reduced, and friction loss of the plunger holes is avoided. Meanwhile, the tilt angle of the swash plate is increased, the return stroke distance of the plunger base can be conveniently increased, and the displacement of the plunger pump is improved.

Description

technical field [0001] The present invention relates to the field of hydraulic pumps, more specifically, it relates to an axial piston pump. Background technique [0002] The pump is the power component and core component of the pressure system, so its design and research are of great significance. The structural forms of the pump mainly include plunger type, vane type, and gear type. The sealing effect of the vane type and gear type pumps is poor, the volumetric efficiency is low, and the leakage is serious when the working pressure is increased. The three pairs of key friction pairs in the commonly used plunger pump structure include the plunger and the cylinder bore, the sliding shoe and the swash plate, the flow plate and the end face of the cylinder body, all of which are in surface contact, so the sealing effect is relatively good. Under the working conditions of the medium, it can ensure a relatively high volumetric efficiency, and compared with the vane and gear pum...

AI Technical Summary

Problems solved by technology

This technical solution is used to improve the return stroke problem in the prior art through the setting of the stepped plunger and the plunger hole, but the processing of the stepped plunger and the plunger hole needs to ensure the coaxiality, which is difficult, and for The cooperation between the two in the plunger pump requires a higher level of precision, which further increases the difficulty of processing. Secondly, compared with the original plunger, the structural strength of the stepped plunger is reduced, and the plunger pump may cause the plunger when it is running. The condition of plug breakage affects the safe operation of the entire hydraulic system

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