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Research on the working principle and abnormal noise of automobile hub bearing With the increase in customer requirements for automobile comfort, the problem of automobile abnormal noise is more and more complained by people. How to quickly lock the source of abnormal noise from many noise sources and eliminate the abnormal noise has become an important problem in automobile maintenance. Among them, the hub bearing has a certain service life as a key component of automobile load and travel. Once a failure occurs, it will produce a disturbing abnormal noise. The abnormal noise of the hub bearing is also a common failure in after-sales maintenance. Based on the working principle of the hub bearing and the characteristics of its abnormal noise, this article provides a method for the rapid diagnosis of the abnormal noise of the hub bearing, which can be used as a reference for the diagnosis of the abnormal noise of the hub bearing.