Predication method of abrasion service life of foil sheet dynamic pressure radial gas bearing

A technology for gas bearings and bearing wear, which is applied in the direction of mechanical bearing testing, etc., and can solve problems such as bearing and foil surface wear

Inactive Publication Date: 2012-07-18
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the hydrodynamic gas bearing has no auxiliary air source, there is contact friction during start-up and stop, causing wear on the bearing and foil surfaces

Method used

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  • Predication method of abrasion service life of foil sheet dynamic pressure radial gas bearing
  • Predication method of abrasion service life of foil sheet dynamic pressure radial gas bearing
  • Predication method of abrasion service life of foil sheet dynamic pressure radial gas bearing

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Embodiment Construction

[0077] See image 3 , the present invention is a method for predicting the wear life of a foil dynamic pressure radial gas bearing, and the specific implementation method includes:

[0078] Step 1: Determine bearing wear mechanism

[0079] The foil dynamic pressure radial gas bearing uses the elastic deformation of the foil to form a wedge-shaped gap between the rotor and the working surface of the bearing to support the load. The foil dynamic pressure radial gas bearing structure consists of three parts: bearing outer ring, foil and bearing. The foil mainly provides support for the bearing. Taking the corrugated foil type dynamic pressure radial gas bearing as an example, see figure 1 . The foils in this type of bearing are divided into corrugated foils and flat foils. Their leading edges are spot welded or stuck on the outer ring shell of the bearing, which is the fixed end; the trailing edge is the free end. Corrugated foils provide support for a single flat foil. The ...

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Abstract

The invention provides a predication method of an abrasion service life of a foil sheet dynamic pressure radial gas bearing, comprising five steps of: step 1, determining a bearing abraded part and a mechanism; step 2, determining main influence factors on abrading a bearing; step 3, determining the abrasion service life of the foil sheet dynamic pressure radial gas bearing; step 4, establishing a single-time starting/stopping abrasion amount predication model of the foil sheet dynamic pressure radial gas bearing; and step 5, establishing a predication model of the abrasion service life of the foil sheet dynamic pressure radial gas bearing. The predication method disclosed by the invention combines a structure and a working principle of the gas bearing to supply abrasion amount and abrasion service life predication models of the foil sheet dynamic pressure radial gas bearing through analyzing random factors including a material process, a working environment, a use task and the like having influences on the bearings, so as to be convenient for maintenance personnel to solve problems in time, improve the utilization rate and the efficiency of the foil sheet dynamic pressure radial gas bearing, and avoid over-abrasion of the bearing to ensure the safety and the reliability of an equipment system. The predication method of the abrasion service life of the foil sheet dynamic pressure radial gas bearing has practical value and a good application prospect in the technical field of the reliability of the gas bearing.

Description

technical field [0001] The invention relates to a method for predicting the wear life of a foil dynamic pressure radial gas bearing, in particular to a method for predicting the wear life based on physics of failure (PoF) technology, the prediction method utilizes the structure of the foil dynamic pressure radial gas bearing Composition and working principle information, combined with bearing working environment, use task and other influencing factor models, to predict the life of this type of bearing, belongs to the field of gas bearing and reliability technology. Background technique [0002] Foil dynamic pressure radial gas bearing is a typical dynamic pressure bearing. The dynamic pressure bearing uses gas as the lubricating medium. Its surface has certain flexibility, low frictional power consumption, stable operation, and can operate in extreme environments such as low temperature, high temperature and high speed. It is widely used in machinery such as turbo compressor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/04
Inventor 姚金勇张坤姜同敏贾宇
Owner BEIHANG UNIV
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