A method for evaluating the condition of rolling bearing based on acceleration sensor

Abstract

The invention discloses a rolling bearing state evaluation method based on an acceleration sensor, relates to the technical field of mechanical equipment fault diagnosis, can use an acceleration sensor instead of a shock pulse sensor to realize accurate evaluation of the rolling bearing state, improves the evaluation reliability, and reduces equipment complexity. The method includes the following steps: using a vibration acceleration sensor to collect vibration acceleration signals of the rolling bearing to be evaluated. The nonlinear response signal near the resonant frequency of the vibration acceleration sensor in the vibration acceleration signal is extracted by band-pass filtering. The extracted nonlinear response signal is demodulated by the envelope to obtain the pulse signal with linear scale. Perform pulse quantization and normalization processing on the linear scale pulse signal to obtain a standardized pulse value dBmn. The standardized pulse value dBmn is compared with the boundary values ​​of different state areas of the rolling bearing to be evaluated, and the state evaluation results are obtained by analysis, and fault detection is carried out according to the state evaluation results.

Description

technical field [0001] The invention relates to the technical field of mechanical equipment fault diagnosis, in particular to an acceleration sensor-based rolling bearing state evaluation method. Background technique [0002] The state assessment of rolling bearings is an effective means to ensure the safe and reliable operation of mechanical equipment. In recent years, people have paid more and more attention to them. At the same time, higher requirements have been put forward for the detection mode of rolling bearing faults. The detection based on the acceleration sensor and the detection based on the shock pulse sensor are currently the most widely used detection modes in the state evaluation of rolling bearings. [0003] The detection based on the acceleration sensor is to collect the vibration in the rolling bearing through the vibration acceleration sensor, and use the time domain, frequency domain and time-frequency analysis to extract the fault characteristics and th...

AI Technical Summary

Problems solved by technology

However, in the fault detection of rolling bearings, the shock pulse sensor does have the irreplaceable superiority of the vibration sensor, and the simultaneous installation of two sets of sensors and monitoring systems will bring limited sensor installation space to the factory, difficult equipment management and high economic costs. question

[0005] Therefore, there are still some deficiencies in the current research on the state evaluation of rolling bearings, and the contradiction between the reliability of state evaluation and the complexity of monitoring equipment needs to be resolved

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