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Rolling bearing vibration performance reliability variation process detection method and rolling bearing vibration performance reliability variation process detection device

A rolling bearing and process detection technology, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as the variation process that cannot predict the performance reliability of rolling bearings

Inactive Publication Date: 2015-01-28
HENAN UNIV OF SCI & TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for detecting the variation process of the vibration performance reliability of rolling bearings, so as to solve the problem that the existing methods cannot predict the variation process of the reliability of rolling bearing performance

Method used

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  • Rolling bearing vibration performance reliability variation process detection method and rolling bearing vibration performance reliability variation process detection device
  • Rolling bearing vibration performance reliability variation process detection method and rolling bearing vibration performance reliability variation process detection device
  • Rolling bearing vibration performance reliability variation process detection method and rolling bearing vibration performance reliability variation process detection device

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Embodiment Construction

[0132] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0133] Firstly, according to the prior failure experiment, the threshold ±c of the bearing vibration performance is obtained. , the threshold is obtained through experiments, and the corresponding threshold is different according to the selected damage site and sensor.

[0134] Define the time variable as τ. In 1 evaluation period T, from different times τ=τ L Start timing until time τ=τ U End timer. Take the time interval Δτ=τ U -τ L =T is a constant with a very small value, and the subscript i is used to indicate the time interval under different time τ, forming a short time interval sequence:

[0135] ΔΓ=(Δτ 1 ,Δτ 2 ,…,Δτ i ,…,Δτ I );i=1,2,...,I(1)

[0136] In the formula, Δτ i is the i-th time interval, I is the number of time intervals, and T is the evaluation period.

[0137] Assuming that in the i-th time interval, a time interval sequence...

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Abstract

The invention relates to a rolling bearing vibration performance reliability variation process detection method and a rolling bearing vibration performance reliability variation process detection device. In the method provided by the invention, according to a time sequence counting process, extremely little variation intensity original information shown by bearing vibration is obtained at a short time interval; through the self-help re-sampling on the variation intensity original information, much variation intensity generating information is simulated; the generating information is processed by using a grey prediction model, and a variation intensity estimation value is obtained; a Poisson process is used for expressing a reliability function; and the variation process of the bearing vibration performance reliability is predicted in real time. The method and the device provided by the invention have the advantages that on the basis of the time sequence of the vibration information, the grey self-help principle is merged into the Poisson process, and a grey self-help Poisson method is provided for predicating the variation process of the rolling bearing performance reliability.

Description

technical field [0001] The invention relates to a detection method for the reliability variation process of the vibration performance of a rolling bearing. Background technique [0002] In order to ensure safe operation, many systems, such as spacecraft, aircraft, high-speed trains and nuclear reactors, have strict requirements on the reliability of rolling bearings during service. Bearings will show many suspicious signs before failure, such as abnormal vibration, temperature rise or friction, which indicates the damage or wear deterioration of the internal parts of the bearing. Therefore, real-time evaluation and prediction of the variation (change / degradation) ) process, the failure hidden dangers can be discovered in time, and measures can be taken in advance to avoid vicious accidents. [0003] From the beginning of service to failure, bearing performance continuously varies, forming a time series with changing performance and reliability trajectories. Based on hypers...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 夏新涛孟艳艳白阳陈士忠黄运生叶亮秦园园邱明
Owner HENAN UNIV OF SCI & TECH
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