A rotary variable displacement pump

Abstract

The application provides a rotor type variable displacement pump, which includes a pump body, a pump cover, an inner rotor, an outer rotor, an adjustment ring and a force applying device; The matching arc section corresponding to the arc; when the pressure in the pump body increases, the adjusting ring will cooperate under the limitation of the meshing relationship between the adjusting tooth section and the fixed tooth section, and the matching arc section of the pitch circle arc and the pump body. Rolling on the arc section, the direction is to make the adjustment ring move towards the oil inlet area; when the pressure in the pump body decreases, under the force of the force device, the adjustment ring is limited by the meshing relationship between the adjustment tooth section and the fixed tooth section, and the pitch Under the restriction of the circular arc and the matching arc section of the pump body, it rolls on the matching arc section of the pump body, and its direction is to make the adjustment ring move towards the oil outlet area to limit the movement track of the adjustment ring; Under the condition of a certain eccentric distance, the eccentric position of the outer rotor rotating around the center of the inner rotor is changed, so as to achieve the purpose of adjusting the displacement of the oil pump.

Description

technical field [0001] The application relates to a hydraulic pump, in particular to a rotor type variable displacement pump. Background technique [0002] At present, the oil pump matched with the automobile engine has transitioned from the traditional quantitative pump to the variable pump. The displacement of the traditional fixed-displacement oil pump is set according to the low-speed and high-pressure working conditions of the engine. The oil supply increases linearly with the increase of the engine speed. After medium and high speeds, it is far higher than the actual lubrication demand of the engine, resulting in waste of energy consumption. The variable displacement pump can automatically adjust the displacement of the pump according to the pressure at the outlet end, realizes the oil supply according to the lubrication requirements of the whole machine, avoids the waste of energy consumption caused by excessive oil supply, achieves the purpose of energy saving, and r...

AI Technical Summary

Problems solved by technology

[0011] The application provides a rotor type variable displacement pump to solve the problems of complex processing structure, high manufacturing cost and low motion accuracy in the prior art

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