Quantitative evaluation method for angular position of bearing outer ring defect
A quantitative evaluation, bearing outer ring technology, applied in mechanical bearing testing, measurement devices, design optimization/simulation, etc., can solve problems such as lack of quantitative indicators, and achieve significant theoretical significance and application value.
Active Publication Date: 2021-02-05
TSINGHUA UNIV
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Problems solved by technology
The angular position of outer ring defects is one of the quantitative information of rolling bearing faults, and there is no mature quantitative evaluation technology and method, the main reason is the lack of quantitative indicators
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[0036] The quantitative evaluation method of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, but the protection scope of the present invention is not limited to the embodiments.
[0037] Such as figure 1 As shown, it is a working flow chart of the structure and application method of the angular position quantification index of the bearing outer ring defect of the present invention. The specific implementation process is as follows:
[0038] 1) Pseudo-static analysis of bearing contact load distribution with outer ring defects:
[0039] A reference coordinate system is established with the axial end face of the bearing as the reference plane, the axis as the origin, the x-axis horizontally to the right, and the y-axis vertically downward; in this embodiment, the number of bearing balls is N b =8, the angle between the center of the first ball and the x-axis is φ 1 , the angle between the center of the jth...
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The invention relates to a method for quantitatively evaluating the angular position of a defect in a bearing outer ring. In this method, the two-dimensional fusion excitation value of the outer ring defect is defined and the mapping relationship between it and the angular position of the defect is obtained through the quasi-static analysis of the bearing contact load distribution of the outer ring defect. Then, combined with the dynamic analysis of the contact load distribution of the bearing with the outer ring defect, the analytical expression of the vibration acceleration response under the excitation of the outer ring defect is obtained. Based on this, the idea of data fusion is used to construct two quantitative indicators of the angular position of bearing outer ring defects: two-dimensional fusion peak value and two-dimensional fusion root mean square value. Finally, by combining the ideal relationship and the measured reference value, the actual functional relationship between the two-dimensional fusion root mean square value and the angular position of the outer ring defect is established, which is used for the quantitative evaluation of the angular position of the outer ring defect, which has important theoretical significance and application value .
Description
technical field [0001] The invention belongs to the field of fault diagnosis of rolling bearings, and in particular relates to a quantitative evaluation method for the angular position of a defect in an outer ring of a bearing. Background technique [0002] Rolling bearings, as the core components of mechanical systems, are widely used in large, precise and high-value equipment such as aerospace, energy power, ships and ships, industrial machine tools, mining and metallurgy. Once the rolling bearing breaks down, it will cause a series of serious accidents, cause heavy economic losses, and even endanger personal safety. Therefore, it is the core demand of modern industry to monitor the condition of rolling bearings and accurately predict their health status and remaining life. Quantitative diagnosis is a prerequisite for life prediction. Life prediction without fault quantification information is like "water without source, tree without roots". As one of the quantitative in...
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IPC IPC(8): G06F30/20G01M13/04G06F119/14
CPCG01M13/045G06F2119/06G06F30/20
Inventor 张飞斌褚福磊王天杨
Owner TSINGHUA UNIV