A car purification pump module supported by foil dynamic pressure air bearing

Abstract

The invention relates to an automobile purifying pump module supported by foil self-acting air bearings. The thrust foil self-acting air bearings, the radial foil self-acting air bearing, a bearing pedestal and a shaft sleeve are made into an integral module with the modularization design thought. The thrust foil self-acting air bearings are arranged on the outer sides of the two end faces of the shaft sleeve respectively, and the radial foil self-acting air bearing is arranged on the outer side of the outer-diameter cylindrical face of the shaft sleeve. By means of the modularization design, installation is convenient, and mass production is promoted. The foil self-acting air bearings are used for replacing traditional rolling bearings or oil bearings to serve as the supporting component of an automobile purifying pump, and thus the automobile purifying pump module supported by the foil self-acting air bearings has the advantages of traditional air journal bearings which are high in rotating speed and revolving precision, small in power consumption, free of pollution, long in service life, capable of working in harsh working environments and the like, and also has the advantages of being high in adaptability, low in manufacturing and assembling precision requirement, good in shock resistance, high in stability, free of a special lubrication system, low in maintaining cost and the like.

Description

technical field [0001] The invention relates to an automobile purification pump bearing, and more particularly relates to an automobile purification pump module supported by a foil dynamic pressure air bearing. Background technique [0002] With the rapid advancement of science and technology, high-speed, high-stability small rotating machines have higher and higher requirements for bearings as core supporting components. As a part of the EVAP system (fuel tank vapor control system) of the car, the air purification pump is a small high-speed rotating machine driven by a motor with a working speed of 40,000 rpm to 100,000 rpm. Performance, noise, service life, etc. have special requirements. Foil dynamic pressure air bearing is a new type of dynamic pressure air bearing. Compared with traditional rolling bearings and oil bearings, it has the advantages of high speed, low friction power consumption, wide operating temperature range, impact resistance, low assembly centering r...

AI Technical Summary

Problems solved by technology

When the outer diameter of the bearing seat is determined, the journal size of the radial foil dynamic pressure air bearing is obviously smaller than the journal size of the shaft sleeve without a thrust plate. When the dynamic unbalance between the impeller and the motor is large, its The bearing capacity of the radial bearing cannot meet the requirements of use

In addition, there is a contradiction between the radial foil dynamic pressure air bearing and the thrust foil dynamic pressure air bearing in terms of performance, that is, increasing the journal of the radial foil dynamic pressure air bearing (improving the radial bearing performance), the inner diameter of the thrust foil dynamic pressure air bearing must be increased (reduce the performance of the thrust bearing); the inner diameter of the thrust foil dynamic pressure air bearing (to improve the performance of the thrust bearing) must be reduced, and the diameter must be reduced Journaling to foil hydrodynamic air bearings (reduces radial bearing performance)

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