Adjustable internal curve hydraulic pump or motor

Abstract

The invention relates to an adjustable internal curve hydraulic pump or motor comprising a stator and a rotor which are coaxially connected and can be rotated relatively. The inner wall of the statoris composed of a plurality of concave curved surfaces and a plurality of convex curved surfaces which are spaced; and the rotor is provided with a piston hole which is internally provided with a piston assembly of which one end comes into contact with the inner wall of the stator, and the other end of the piston assembly reciprocates in the piston hole in the axial direction of the piston hole. Inthe direction vertical to the axial direction of the stator, the section of one end of the inner wall of the stator is circular, and the section of the other end of the inner wall is undulant; the undulant degree of the section of the inner wall gradually increases from one end to the other end, and the inner wall is provided with a plurality of guide slots which undulate along the wave shape; and one end of the piston assembly is located in the guide slots, and matched with the shape of the guide slots. An included angle is formed between the axis of the piston hole and the radial directionof the rotor in a plane defined by that the axis of the piston hole intersects with the axis of the rotor.

Description

technical field [0001] The invention relates to an inner curve hydraulic pump or motor, in particular to an adjustable inner curve hydraulic pump or motor. Background technique [0002] The inner curve hydraulic pump / motor has the advantages of small size, light weight, compact structure, radial force balance, small torque ripple, large transmission torque, high starting efficiency, and can work stably at a very low speed, etc., and is widely used in winches , Heavy-duty walking machinery, mining machinery, marine windlass, cranes, tension systems in other manufacturing industries and other hydraulic systems. For working conditions that require both driving (motor state) and continuous braking (pump state), such as noon lifting and falling of hoists and cranes, driving and braking of heavy machinery, tension systems, etc. [0003] However, the internal curve hydraulic pump / motor in the prior art is not structurally adjustable, the curved surface of the inner wall of the sta...

AI Technical Summary

Problems solved by technology

[0003] However, the internal curve hydraulic pump / motor in the prior art is not structurally adjustable, the curved surface of the inner wall of the stator is set parallel to the axis of the stator, and neither the stator nor the rotor can move in the axial direction, regardless of the working condition of the motor or the pump. The working condition, as long as the input is constant, its output is constant

This limits its application to a large extent

However, if the inner curve hydraulic pump / motor is designed as an adjustable structure, that is, the inner wall of the stator is designed to be inclined, it will inevitably cause problems such as increased eccentric wear, and the wear on the inner wall of the stator will also increase

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