Research On Characteristics Extraction Of Friction Vibration In The Running-in Process

Good running-in is based on a reasonable running-in procedures and accurate quality assessment. When does the running-in process end, and how to evaluate the running-in quality, are problems the majority of researchers concern. Therefore, in order to control the running-in process, people keep on researching the variation of the running-in process.Wear surface can be used to analysis and evaluate the running-in process, however, measurement and analysis of the wear surface must interrupt the running-in, leading to running-in process can not be carried out continuously. Vibration, produced in the running-in process,can reflect the state of friction and wear. Thus,researching on the variation of friction vibration signals, can provide new methods to research the runing-in process.Paper selected cylinder-piston ring friction as the research object, carried out the running-in testing in the lab. Collect the coefficient of friction, wear surface and friction vibration signals. Research on variation of friction vibration signals,compared with variation of the coefficient of friction and wear surface. Use the harmonic wavelet reducing noise, using singular value decomposition method to extract the parameters of friction vibration signals K.Conclusion: The variation of parameter K is consistent with the variation of friction coefficient,reflecting changes in the running-in surfaces, so the friction vibration signals can be used in running-in process analysis and evaluation.Researching on friction variation in running-in process provides methods for the analysis and evaluation of the running-in process,which has certain theoretical significance and application value.