Meshing performance analysis of the measured gear with error based on the multi-section structure

ObjectiveThe development of new energy vehicles has put higher requirements on the micro-morphology of the tooth surface. However, the stability of gear transmission can be affected by the existence of tooth profile error. To accurately study the effect of tooth profile error on the meshing performance of involute gears, and thus provide the guidance for the development of high-precision gears in new energy vehicles, compared with the three-section measurement of tooth surface, which is the current method, a construction method of tooth surface, using the multi-section form, based on the dot matrix of measured tooth surface, was proposed to make the constructed tooth surface more approximate to the actual one.MethodsFinite element simulation was used to analyze the variation of tooth contact stress in the meshing cycle and transmission error under different loads between the constructed gear with tooth profile error using the multi-section method and the one using the three-section method.ResultsThe results show that compared with the gear with tooth profile error, constructed by the three-section method, variation of the maximum contact stress of the one with the multi-section method is obvious in the whole meshing cycle and the change of contact area and allocation way of load brought by tooth profile error is precisely demonstrated. Meanwhile, with the increment of the load torque, the growth of the transmission error amplitude of gear with tooth profile gear, constructed by the multi-section method is higher, which reflects the state of actual tooth surface better. The solid foundation for further research on the rapid and efficient construction of gear model, which is fitted to the actual one, is laid.