Method for judging peeling position of rolling bearing

A judging method and technology of rolling bearings, which are applied in the testing of measuring devices, instruments, and mechanical components, etc., can solve the problems affecting the normal operation, maintenance and repair of equipment, the inability to accurately simulate the vibration signal of bearings, economic losses, etc.

CN111337255AActive Publication Date: 2020-06-26SHENYANG JIANZHU UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-06-26

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Abstract

The invention provides a method for judging the peeling position of a rolling bearing. Firstly, a nonlinear kinetic model of a spalling fault bearing is established; obtaining a simulated frequency domain vibration curve of the spalling fault bearing; then acquiring a vibration signal on a bearing with a fault or a suspected fault; extracting an actual measurement frequency domain vibration curve,then calculating fault characteristic frequencies of an outer ring and an inner ring of a bearing with a fault or a suspected fault, comparing the fault characteristic frequencies with the actual measurement frequency domain vibration curve by taking the simulation frequency domain vibration curve as a reference, determining whether the bearing to be measured is a fault bearing or not, and determining a specific fault position. According to the invention, the problem of inaccurate actual fault simulation of a fault nonlinear kinetic model is avoided; meanwhile, pulse modulation in the processthat the rolling body passes through the fault position of the inner ring and the outer ring during operation is considered, the operation state of the bearing during early faults can be simulated more accurately, the detection efficiency and precision are effectively improved, the equipment maintenance cost is reduced, and the production efficiency is improved.
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Description

technical field

[0001] The invention relates to the technical field of bearing fault diagnosis, in particular to a method for judging the spalling position of a rolling bearing. Background technique

[0002] Spalling fault is one of the main reasons for the failure of rolling bearings. Through statistical analysis of rolling bearing spalling faults and comparison with the frequency domain signal of bearing vibration response, it is possible to judge whether spalling faults occur in rolling bearings, and to distinguish the location of spalling faults It is located in the inner or outer ring of the bearing, so that it can be repaired or replaced in time, so as to prevent the bearing from failing due to excessive peeling failure, which will cause the failure of the whole machine, cause unnecessary economic losses and possible casualties, and make the bearing work process Always under control. Existing identification methods for bearing peeling faults cannot accurately determin...

Examples

Embodiment Construction

[0050] The following is a detailed description of the technical solution of the present invention in conjunction with the accompanying drawings.

[0051] like figure 1 As shown, a method for judging the spalling position of a rolling bearing includes the following steps:

[0052] Step 1: Establish a nonlinear dynamic model of the spalling fault bearing, and obtain the simulated frequency domain vibration curve of the spalling fault bearing, including the following steps:

[0053] Step 1.1: First, the lumped parameter model is used to simulate the operating state of the spalling fault bearing, figure 2 It is a schematic diagram of the process of the rolling body when there is a spalling fault in the inner and outer rings of the bearing, and then according to the spalling fault position of the bearing rolling body and the bearing inner / outer ring, the change process of the contact stiffness between the bearing rolling body and the bearing inner / outer ring is obtained, and the ...