Lubricating oil pump for optimizing axial clearance

Abstract

The invention relates to a lubricating oil pump for optimizing axial clearance, wherein the lubricating oil pump comprises a pump body, a pump cover and a rotor system; the rotor system is located in a closed cavity body formed by the pump body and the pump cover; a tapered gasket is arranged between the pump body and the pump cover, the exterior of the tapered gasket is thick, the interior of the tapered gasket is thin, and the linear expansion coefficient of a material of the tapered gasket is lower than that of a material for manufacturing the rotor system. The lubricating oil pump has the advantage of automatic compensation of clearance changes generated due to different expansion coefficients of materials of parts of the lubricating oil pump, can have quite small efficiency reduction in the temperature range of -40 DEG C to 160 DEG C, and moreover, has the advantages of light weight, easy starting, easy manufacture and the like.

Description

Technical field [0001] The invention relates to a lubricating oil pump, in particular to a lubricating oil pump optimized for axial clearance. The lubricating oil pump can automatically compensate for the change of the clearance caused by the different expansion coefficients of the materials of the various parts of the lubricating oil pump. Background technique [0002] The prior art lubricating oil pumps include various gear pumps, hypocycloid rotor pumps, and rotary plate pumps. In order to ensure the use requirements, the oil pump needs to meet the corresponding technical indicators. For example, in the aviation and automotive fields, in order to achieve weight reduction, the housing and rotor system are usually made of materials with different expansion coefficients. Usually the shell will be made of a material with a lower density but a larger coefficient of linear expansion, and the rotor will be made of steel with a smaller coefficient of linear expansion. At low tempera...

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Problems solved by technology

[0004] image 3 Shown is a gear pump with an optimized axial clearance shown in Patent No. CN100564877C, in which a nickel steel sleeve 7 with a lower coefficient of linear expansion than gear steel is added to the casing, so as to realize the axial clearance of the lubricating oil pump at low temperature. The gap d becomes larger, and the axial gap d of the lubricating oil pump becomes smaller at high temperature, but this structure greatly increases the weight of the lubricating oil pump due to the use of a larger steel sleeve, and the oil filter and pressure regulating valve are integrated in the pump body It is difficult to design and manufacture when the structure is equal, and it cannot meet the needs of aviation, automobile and other industries

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