Anti-impact structure of variable vane pump

Abstract

The invention provides an anti-impact structure of a variable vane pump. The anti-impact structure of the variable vane pump comprises a pre-stretching piece seat (1), a pre-stretching piece (2), a top plug (3), a stator (4) and a pump body (5); a pressure adjustment hole (7) is formed in one side of the pump body (5); the pre-stretching piece seat (1) is arranged at the position of the pressure adjustment hole (7); the top plug (3) is arranged at the radial side end of the stator (4), the pre-stretching piece (2) is arranged in the pressure adjustment hole (7) and is connected with the pre-stretching piece seat (1) and the top plug (3); and the stator (4) is arranged in the pump body (5), radial grooves are formed in the side surfaces of the pre-stretching piece seat (1) and the top plug(3) buffer structures (6) are correspondingly arranged in the radial grooves, and the buffer structures (6) are attached to the side wall of the pressure adjustment hole (7). According to the anti-impact structure of the variable vane pump, the method of combining a damp and an oscillator is adopted, the displacement of the stator is reduced, the influence of reversing impact is avoided, and the stiffness requirement of a spring is reduced.

Description

technical field [0001] The invention relates to the field of liquid pumps or elastic fluid pumps, in particular to an anti-shock structure of variable vane pumps. Background technique [0002] The variable vane pump, that is, the single-acting vane pump is a widely used hydraulic component. The single-acting vane pump is mainly composed of rotors, stators, vanes and distribution plates. The inner surface of the stator is a cylindrical surface. There is eccentricity between the rotor and the center of the stator. The blades can slide flexibly in the groove of the rotor. Under the action of the centrifugal force of the rotor and the oil pressure at the blade root, the top of the blade is close to the inner surface of the stator. , so two adjacent blades, oil distribution plate, stator and rotor form a sealed working chamber. Because the pump absorbs oil and presses oil once during the process of one revolution of the rotor, it is called a single-acting vane pump. The rotor i...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems of the single-acting vane pumps in the prior art using springs with high rigidity that greatly reduce the flow rate and lower volumetric efficiency during low-pressure use, and provides a variable-variable vane pump anti-shock structure, which adopts The method of adding damping elements to the spring position reduces the impact of commutation shock

[0007] Damping is set on the two sliders, and the damping element and the side wall of the pressure adjustment hole dry friction, reducing the reversing impact caused by the inevitable left and right swing of the stator in the working state, avoiding the formation of resonance, and solving the problem of reversing impact and variable blades The problem of low volumetric efficiency when the pump is used at low pressure, the structure is simple and easy to implement

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