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International Journal of Structural Mechanics and Finite Elements

Rolling Element Bearing Diagnosis Using Machinery Fault Simulator

  1. Krishna Lok Singh

Abstract

The paper presents the diagnosis strategy for the rolling element bearing system used in machinery fault simulator (MFS). The concept is generic and it is applicable for most of the system involving bearing sub-system. The MFS details and its various maintenance strategies described. The monitoring of the rolling element bearing (REB), done with the accelerometer sensors. Acquisition of data from the sensor analog voltage to the CPU in digital format carried out using LabVIEW’s DAQmx. After acquisition the data, transferred through filters such as Low-pass, High-pass, Band-pass, Band-stop, and Smooth algorithms. Further the data analyzed using FFT (Fast Fourier Transform) and CWT (Continuous Wavelet Transform), the details along with its equations discussed in this paper. The REB fault frequencies computed using the expressions and these compared with the MFS fault bearings data. The paper presents Ball Pass Frequency Outer-race (BPFO), Ball Pass Frequency Inner-race (BPFI), Ball Pass Frequency Roller (BPFR) and lastly the combined fault. Paper demonstrates the diagnosis of a bearing through these analysis and provides a feedback to the user. Keywords: bearing, machinery fault simulator, vibration analysis, data acquisition, data transformation

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