Abstract
We developed the tribocharge sensor could be built in the rolling bearing to monitor the degradation of grease in the bearing. As a result of our research so far, by analyzing the output of the tribocharge sensor, we have found the possibility of (1) measurement of the bearing rotation speed, (2) estimation of the bearing internal temperature, and (3) sensing the water content in the grease. In this study, the stator electrode was attached to the rear surface of the seal and built in the bearing, and by using the retainer as the rotor electrode, a tribocharge sensor was operated to monitor the water content of grease.
