Development of a Novel Detection Method to Measure the Cage Slip of Rolling Bearing

A novel, non-contacted method is proposed to determine the cage slip of rolling bearing. Findings show that the roller and inner raceway can generate weak magnetic field (WMF). The WMF detection technology is introduced into the measurement domain of cage slip. The feature frequency of a roller and inner raceway, which reflect the cage slip, can be extracted simultaneously by the WMF sensor output signal. Here, the roller shares the same feature frequency with the cage. Compared with the traditional optical detection method, the proposed method does not require any pre-processing for rolling bearing. The cage slip is detected under different work conditions. The cage slip, which is determined by the proposed method, is consistent with that of the traditional optical method. It shows that the proposed method can be used to detect cage slip of rolling bearing.