A method and system for predicting the performance and service life of rolling bearings

Abstract

The invention discloses a method and system for predicting the performance and service life of a rolling bearing. The method for predicting the performance and service life of the rolling bearing includes calculating the energy value of the eigenmode component of each group of analysis signals, the ratio of the energy value of the eigenmode component of the normal rolling bearing to the total energy of each eigenmode component, and Obtain the relative energy entropy after variational modal decomposition, and judge whether the sequence of relative energy entropy after variational modal decomposition reaches the stable sequence required by the time series model. Processing to make it reach the smooth sequence required by the time series model; and use the index of relative energy entropy after variational mode decomposition to predict the performance and service life of rolling bearings. The invention greatly reduces economic and time costs, and has high operation and maintenance efficiency.

Description

technical field [0001] The invention relates to the technical field of performance analysis of rolling bearings, in particular to a method and system for predicting the performance and service life of rolling bearings. Background technique [0002] Rolling bearings are key components for power transmission and operation support of mechanical equipment, and whether their working status is normal or not directly affects the safe operation of equipment. Generally speaking, after a long period of operation of rolling bearings, factors such as fatigue wear, vibration and shock will cause its performance state to gradually change, resulting in unstable operation of the equipment, resulting in accidents. At present, the maintenance of mechanical equipment with rolling bearings as the key components is mostly based on regular inspections and post-failure maintenance. This method not only consumes a lot of economic and time costs, but also has low operation and maintenance efficiency...

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Problems solved by technology

[0003] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a method and system for predicting the performance and service life of rolling bearings, which is used to solve the problems in the prior art that mainly focus on regular inspections and after-failure maintenance. This method not only consumes a lot of economic and time costs, but also has a rather low operation and maintenance efficiency, which makes it impossible to predict the degradation trend of rolling bearing performance.

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