Technology Research, Analysis For Main Reducer Quality Evaluation Of The Vibration Signal

In this paper, the analysis of the vibration signal of the automobile drive shaft is described. Based on the comprehensive estimating method of the final drive, the analysis method is proposed to focus on analyzing one of the important testing targets– the meshing states of the spiral bevel gears and differential gears of the final drive when they are working under the imitating conditions.It starts with the structure and functions of the final drive, which helps in testifying the importance of noise or vibration analyzing. Then the sources and principles of the noise of final drive gear are presented. And the close relationship between noise and vibration signal is discussed. Compare the collecting and analysis techniques of the two forms of signal, it is shown that the vibration analysis method is more suitable and scientific in evaluating the assemble quality of final drive.The paper also designs the vibration signal analysis system composed of sensor, interface installations and the computer. Because of the powerful compilatory capability of Visual C++ software and the favorable capability of data processing and graphics displaying of Matlab software, the mixed programming is adopted in order to implement the functions of the analysis system. Based on the broad applications of wavelet theory in failure diagnosis, the Daubechies wavelet function is employed in this system.This proposed analysis method is about to replace the traditional method with experienced operators in detecting the quality of final drive. The simulated signal is taken into the system and analysed using the method aforementioned as an example. According to the analysis results, the conclusions for evaluating the quality of final drive can be drawn more rapidly and rationally.