Fault diagnosis method of rolling bearing under variable working conditions
A rolling bearing and fault diagnosis technology, applied in the direction of mechanical bearing testing, etc., can solve the problems of failure judgment accuracy and decline, and achieve the effect of improving judgment accuracy, judgment speed and good stability
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[0077] This example uses the experimental data of 6205-2RS deep groove ball bearings for verification. The outer diameter of the bearing is 39.04mm, the thickness is 12mm, the pitch diameter is 28.5mm, the diameter of the rolling elements is 7.94mm, and the number of rolling elements is 9. The angle is 0°. The bearing test consists of a motor with a power of 1.5kW, a torque sensor / encoder, a dynamometer and an electrical control device. The motor drives the input shaft, and the output shaft drives the load.
[0078] The sample signals collected during the normal state of the rolling bearing, the inner ring fault, the outer ring fault, and the rolling element fault are respectively used to detect and verify the rolling bearing fault diagnosis method based on the Hilbert-Huang transformation and singular value decomposition of the present invention under variable working conditions. The specific steps are as follows :
[0079] Step 1. In the running state of the rolling bearing...
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