A low-speed and high-torque hydraulic motor with two-end plate flow distribution

Abstract

The invention discloses a two-end disc flow-distribution type low-speed large-torque hydraulic motor comprising flow-distribution bodies, plunger pairs, plunger linings, ball valves, ball valve sleeves, flow-distribution discs, a rotor, an inlet, an outlet and an inner curve type stator. High-pressure liquid is guided to flow to inlets of the flow-distribution discs and acts on the ball valves toenable valve balls to seal the outlet end; after the high-pressure liquid enters plunger cavities to push plungers to move to the highest points, along with rotation of the rotor, the inlet is sealedand the outlet is opened at the moment, and the plungers move to the topmost ends under pushing of the high-pressure liquid so as to complete lift; and then, part of the high-pressure liquid in the plunger cavities is made to enter the outlet through plunger sleeve flow channels, the ball valves are pushed back to the initial positions under the effect of spring force, at the moment, the plungersstart to conduct return stroke, the high-pressure liquid in the plunger cavities flows out through the outlet, and thus the plungers finish the return stroke. The two-end disc flow-distribution type low-speed large-torque hydraulic motor is reasonable, compact and convenient to use, the volume efficiency is greatly improved, and high-pressure and low-pressure liquid inlets and outlets are formed in the same end of the motor, so that the structure is more compact.

Description

technical field [0001] The invention belongs to the technical field of hydraulic pressure, relates to a low-speed high-torque hydraulic motor, in particular to a low-speed high-torque hydraulic motor of a two-end plate flow distribution type, and belongs to the technical field of fluid transmission and control. Background technique [0002] The low-speed high-torque hydraulic motor uses high-pressure liquid as the working medium, and plays an important role in the components of the hydraulic system. Its quality determines the performance of the hydraulic system; but the low-speed high-torque hydraulic motor with the same end face distribution is widely used at present. , although the flow distribution on the same end face can reduce the volume of the motor components to a certain extent, there is a problem of high and low liquid communication on the same flow plate; only relying on the gap seal will form high and low pressure fluids to communicate with each other on the end f...

AI Technical Summary

Problems solved by technology

[0002] The low-speed high-torque hydraulic motor uses high-pressure liquid as the working medium, and plays an important role in the components of the hydraulic system. Its quality determines the performance of the hydraulic system; but the low-speed high-torque hydraulic motor with the same end face distribution is widely used at present. , although the flow distribution on the same end face can reduce the volume of the motor components to a certain extent, there is a problem of high and low liquid communication on the same flow plate; only relying on the gap seal will form high and low pressure fluids to communicate with each other on the end face, which will inevitably lead to volumetric efficiency Low, large leakage, short life and a series of problems

At present, domestic and foreign are mainly working on increasing or reducing the sealing band on the distribution plate or using static pressure support to solve such problems, and some research institutions are studying the leakage problem by appropriately changing the inner curve structure and the number of plunger pairs; Therefore, the traditional low-speed high-torque hydraulic motor has not fundamentally solved the problem of high and low pressure fluid communicating through the sealing gap

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