Novel axial plunger pump

Abstract

The invention discloses a novel axial plunger pump. According to the technical scheme, the novel axial plunger pump is characterized by comprising an end cover, a front shell, a pump shaft arranged inside the front shell, a rear shell, a swash plate and a cylinder, wherein the swash plate and the cylinder are installed inside the rear shell; the end cover, the front shell, the rear shell and the cylinder are sequentially and fixedly connected, and the swash plate is connected to the end, back on to the shell, of the pump shaft; a cross-shaped swinging plate and a plunger assembly are further arranged inside a plunger pump; a plunger hole, a valve hole, a pressing-out valve set and a pressing-in valve set are arranged inside the cylinder, the pressing-out valve set and the pressing-in valve set are located in the valve hole, one end of the plunger assembly is embedded in the plunger hole, and the other end of the plunger assembly is connected with the cross-shaped swinging plate; the cross-shaped swinging plate abuts against the swash plate in a contact manner; and due to the fact that in the prior art a retainer plate and a piston shoe are embedded into a whole through a piston shoe plate, and the piston shoe and the a plunger bulb are embedded into a whole through the piston shoe plate, lateral force of the cylinder and a plunger base is decreased, meanwhile, the tilt angle of the swash plate is increased, the return distance of the plunger base is enlarged, displacement of the plunger pump is improved, the efficiency of the plunger pump is improved, and the design of the cylinder is further simplified.

Description

technical field [0001] The present invention relates to the field of hydraulic pumps, more specifically, it relates to a novel 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 gea...

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. In the case of plug fracture, the cylinder block still needs to rotate in this technical solution, which brings certain pressure pulsation, hydraulic shock and noise to the hydraulic system, which affects the safe operation of the entire hydraulic system

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