The Relationship of Detection Ratios between Positions of Bearing Fault and Locations of Sensor

抄録

The relationship of failure detection ratios between sensors and bearings at different distances were investigated in order to decide the rational numbers of sensors and select appropriate sensor locations. The impulse signals from damaged bearing were separated from the vibration signals of machinery failure by an envelope detector. The failure detection ratios were calculated according to the analysis of impulse signals. Experimental results have shown that locating an accelerometer on the bearing housing to monitor conditions of a few bearings at different distances is possible and the relationship between the failure detection ratios and various testing conditions have been obtained. This detection method, using an accelerometer to monitor a few bearings at different distances, has been proved to be able to satisfy the various requirements of failure diagnosis. In addition, since the method reduced the unnecessary number of sensors and other devices, it can not only decrease the costs of monitoring devices, but also decrease the self-maintenance costs of monitoring devices. This study provides a new approach for bearing failure diagnosis.