Research On Fault Diagnosis For Transmission Bearing On Line

Transmission is important in the car. Bearing is key component of transmission. It's capability would affect the function of transmission and the car. To analyze the measurement method of bearing is an important thing for car. Order analysis is a appropriate method of fault diagnosis for transmission bearing.Firstly, this paper expatiate the important means of bearing, and the development situation of fault diagnosis is also be involved in this paper. Secondly, the vibration theory and signal features of transmission's bearing are introduced. Here we explain the vibration reasons and make a summary of the signal type.The paper researches on non-steady signal of fault diagnosis for rotation machinery. To avoid the"frequency confusion"in the traditional frequency analysis, order analysis usually be used to analyze the mechanical signal with instability speed. Firstly, sample the run-up instantaneous signal of the transmission in time field. Secondly use the order-track to convert the time field signal to the angle field stationary signal. Finally,analyze the resample signal in angle field with order analysis. That can pick-up the default character of transmission,find the default place,default time and default style. It is proved that order analysis can identify the default of transmission bearing effectively.