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A Method for Estimating Spalling Size of Rolling Bearings

A rolling bearing and size technology, which is applied in the testing of mechanical parts, the testing of machine/structural parts, instruments, etc., can solve the problems of difficulty in determining the time, and it is difficult to accurately determine the size of bearing spalling, and achieve the effect of improving the estimation accuracy.

Active Publication Date: 2020-01-31
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, because the time when the center of the bearing steel ball enters the spalling entrance boundary is difficult to determine, the bearing spalling size is mostly estimated by indirect methods, and it is difficult to accurately determine the spalling size of the bearing
And the current estimation of the spalling size of the bearing is mostly for the spalling of the outer ring, while the estimation of the spalling size of the inner ring of the bearing is less involved

Method used

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  • A Method for Estimating Spalling Size of Rolling Bearings
  • A Method for Estimating Spalling Size of Rolling Bearings
  • A Method for Estimating Spalling Size of Rolling Bearings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] For 6209 deep groove ball bearings, the basic parameters of the bearing: outer ring groove radius R 0 =37.673mm, inner ring groove radius R i =27.3405mm, rolling body radius r=5.5195mm, Young’s modulus E of inner and outer rings 1 =210000Mpa,E 2 =210000Mpa, Poisson's ratio v of inner and outer rings 1 = 0.3, v 2 =0.3, inner ring speed ω i =500r / min.

[0072] Establish a three-dimensional model of the bearing in Pro / E, and set the linear peeling size of the inner ring to 2mm. Import the model into Adams, set the contact force to 500N, obtain the vibration signal when the steel ball passes through the peeling area, and extract t from the signal e = 0.00035s and t p = 0.0012s. At point A, a 1 and a 2 It can be calculated by Hertzian contact theory.

[0073]

[0074]

[0075] The deformation between the steel ball and the outer ring and between the steel ball and the inner ring in the rolling bearing is:

[0076]

[0077]

[0078] If the distance fro...

Embodiment 2

[0099] For 6209 deep groove ball bearings, the basic parameters of the bearing: outer ring groove radius R 0 =37.673mm, inner ring groove radius R i=27.3405mm, rolling body radius r=5.5195mm, Young’s modulus E of inner and outer rings 1 =210000Mpa,E 2 =210000Mpa, Poisson's ratio v of inner and outer rings 1 = 0.3, v 2 =0.3, inner ring speed ω i =500r / min.

[0100] Establish a three-dimensional model of the bearing in Pro / E, and set the linear peeling size of the inner ring to 3mm. Import the model into Adams, set the contact force to 500N, and also obtain the vibration signal when the steel ball passes through the spalling area, and extract t from the signal e = 0.00035s and t p = 0.002s. At point A, a 1 and a 2 It can be calculated by Hertzian contact theory.

[0101]

[0102]

[0103] The deformation between the steel ball and the outer ring and between the steel ball and the inner ring in the rolling bearing is:

[0104]

[0105]

[0106] If the dist...

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Abstract

The invention provides a method for estimating the peeling size of a rolling bearing. After an inner ring of the rolling bearing is peeled linearly, when steel balls roll through a peeled region, thecontact pressure of the steel balls to the inner ring and an outer ring is reduced suddenly so that the bearing vibrates, an extracted acceleration signal generated by the inner ring is a vibration signal, the peeling size is derived according to a geometry relationship graph of the rolling track of the steel balls through a mathematical formula, a vibration image of the inner ring when the rolling bearing rotates is generated by Adams dynamics simulation software or through a testing method, then a program is written by MATLAB to solve the mathematical formula, finally, the width of the peeled region is obtained, and the accuracy of the method is verified. The peeling size of the inner ring of the bearing is estimated through the vibrating signal of the bearing and the geometric structureof the inner ring of the bearing.

Description

technical field [0001] The invention belongs to the technical field of rolling bearing fault diagnosis, in particular to a method for estimating the spalling size of rolling bearings. Background technique [0002] Bearings are important parts in mechanical equipment, and the peeling of bearings will have a great impact on the operation of mechanical equipment. Estimation of the size of bearing spalling can determine the impact of bearing spalling on the operation of mechanical equipment. Even under the same conditions, the size of spalling can also determine the remaining life of the bearing. The larger the spalling size, the shorter the remaining life of the bearing. At present, since the time when the center of the bearing steel ball enters the spalling entrance boundary is difficult to determine, the bearing spalling size is mostly estimated by indirect methods, and it is difficult to accurately determine the spalling size of the bearing. And at present, the estimation o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/045G01B21/02
CPCG01B21/02G01M13/045
Inventor 邓松熊剑华林钱东升
Owner WUHAN UNIV OF TECH
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