Radial plunger hydraulic pump adopting slide valves for flow distribution

Abstract

The invention discloses a radial plunger hydraulic pump adopting slide valves for flow distribution. Five plunger sets are arranged in the radial direction of the pump, and the flow distribution slide valves working in cooperation with the plunger sets are arranged on one sides of plungers side by side, and the flow distribution slide valves are communicated through flow channels formed in a pump body. The space in the pump body is fully utilized. Rotation of an eccentric wheel is converted into linear movement of the plungers through a five-star wheel, a friction face is lubricated through fluid dynamics, friction force is small, and simplicity and reliability are achieved. High-pressure oil liquid output by a discharge valve is led out, stroke return of the plungers is achieved by means of hydraulic force, the stroke return force is stable, noise is low and service life is long. The plunger sets of the pump are installed on the pump body from the outer portion, fast detaching can be achieved, and installing and maintaining are facilitated. Damping holes are formed in middle shafts of the plungers, the high-pressure oil liquid can be led to bottom faces, the bottom faces of the plungers are provided with sealing strips and oil chambers, the oil liquid after depressurization is filled into the oil chambers, lubricating oil films are formed between the five-star wheel and the bottom faces of the plungers, and the friction force is relieved.

Description

technical field [0001] The invention belongs to the technical field of radial plunger hydraulic pumps, and in particular relates to a radial plunger hydraulic pump using slide valves for flow distribution. Background technique [0002] Designing a hydraulic pump with better pressure and flow performance is an important means to develop hydraulic transmission technology. [0003] Radial piston pump is a kind of hydraulic pump with advantages of large flow, low wear and high volumetric efficiency, and is widely used in hydraulic systems such as die casting, injection molding and forging. The oil distribution method of common radial piston pumps is mostly one-way valve oil distribution or shaft oil distribution. Spring parts are needed in the one-way valve oil distribution method. Since the spring needs to be deformed frequently during the working process, it is easy to Fatigue damage occurs, and the noise and vibration are large during operation; while the hydraulic pump usin...

AI Technical Summary

Problems solved by technology

The oil distribution method of common radial piston pumps is mostly one-way valve oil distribution or shaft oil distribution. Spring parts are needed in the one-way valve oil distribution method. Since the spring needs to be deformed frequently during the working process, it is easy to Fatigue damage occurs, and the noise and vibration are large during operation; while the hydraulic pump using shaft oil distribution has the disadvantages of difficult processing, and the flow distribution part is not easy to achieve good sealing

In addition, in the existing radial piston pumps, the return stroke of the plunger generally adopts a return disc structure or a return spring. As for the return disc, since it is a rigid structure, a certain gap must be left between it and the pressed surface to prevent To ensure the smooth movement of the plunger, it is necessary to introduce additional elastic elements to make up the gap, otherwise oil leakage will easily occur; for the spring return method, like the spring in the one-way valve, it is also vulnerable to damage and loud noise. Shortcomings

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