A vane type stepless variable oil pump controlled by a stepping motor

Abstract

The invention relates to a blade type stepless variable oil pump controlled by a stepping motor. The blade type stepless variable oil pump comprises a pump body, a thrust plate, an outer regulating ring, a rotor, a pump cover, a driving shaft and a linear output shaft, wherein the pump body is provided with a cavity which is provided with an oil outlet and an oil inlet; the thrust plate is arranged in the cavity of the pump body and is provided with an oil discharge cavity and an oil suction cavity, and the oil discharge cavity and the oil suction cavity are communicated with the oil outlet and the oil inlet; the outer regulating ring is arranged on the thrust plate; rotor is located in the outer regulating ring, the rotor and the inner wall of the outer regulating ring form an annular cavity, the rotor is provided with a plurality of blades which abut against the inner ring wall of the outer regulating ring, the annular cavity is divided into a plurality of containing cavities through the blades, and the two ends of the rotor are both provided with eccentric blade supporting rings which abut against the roots of the blades; the pump cover is arranged on the cavity of the pump body; the driving shaft penetrates through the pump body, the thrust plate, the outer regulating ring and the rotor and is connected to the pump cover; the linear output shaft stretches into the cavity from one side of the pump and abuts against the outer regulating ring. Compared with the prior art, the blade type stepless variable oil pump controlled by the stepping motor has the advantages of being high in control accuracy, high in operation efficiency, simple in structure and the like.

Description

technical field [0001] The invention relates to a vehicle oil pump, in particular to a vane type stepless variable variable oil pump controlled by a stepping motor. Background technique [0002] Conventional fixed-displacement oil pumps are designed based on the oil demand of the engine at hot idle speed, and the pump oil volume increases almost linearly with the speed change, resulting in excessive oil output and high oil pressure at high speeds. Usually, it is necessary to use the oil pressure limiting valve to bypass the excess oil to ensure the normal operation of the engine, but this will waste a part of the oil pump power consumption. Therefore, using a variable displacement oil pump and making it supply oil on demand according to the actual demand characteristics of the lubrication system has practical significance for reducing the power consumption of the oil pump and improving fuel economy. [0003] A considerable number of variable displacement oil pumps have been...

AI Technical Summary

Problems solved by technology

[0003] A considerable number of variable displacement oil pumps have been developed at home and abroad, such as rotor type, external gear type, vane type, etc., but most variable displacement pumps use feedback oil to drive variable actuators, and multiple hydraulic valves are required to control feedback. oil, and the arrangement of the oil passage is complicated, resulting in the variable response of the oil pump to be sluggish, the pressure fluctuates greatly, and there are many leakages

Moreover, this type of oil pump can only achieve primary or secondary variables, and cannot achieve optimal matching with the engine lubrication system

At present, there is no vane oil pump that uses a stepping motor to control the variable actuator and realizes stepless variable.

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