Abstract
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.
Highlights
In the ideal work condition, the rolling bearing has a cyclic symmetrical structure under pure rolling
If the rollers come into contact with the outer raceway of rolling bearing, the roller may slip along inner ring race of outer raceway of rolling bearing
To obtain the above frequency, this paper proposes a novel method based on weak magnetic field (WMF) detection technology
Summary
In the ideal work condition, the rolling bearing has a cyclic symmetrical structure under pure rolling. Rotation speed has only been detected by placing the sensor near the target at a very close distance [4] This sensor is not suitable to detect cage slip due to limited setting space in the service environment. Optical fiber sensor has many advantages, such as compact dimension, fast response speed, high temperature and wide sensor range [5]–[7] Such sensor is developed to measure the rotation speed of bearing roller [8]. Ultrasonic methods need media, such as water, to detect cage slip. To solve the above-mentioned problem, a novel, noncontacted method is proposed to detect the cage slip of rolling bearing. The detected result of cage slip is consistent with that of the traditional optical method.
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