Simulation and test study of temperature field of small module plastic gears with curve configuration

LIANG Dong; LIU Yun; SUN Qunlong; WU Yukang; HU Hanbao; XU Xiangyang

doi:10.16578/j.issn.1004.2539.2026.03.013

Abstract：[Objective]Temperature is a key factor affecting the service performance of plastic gear.In order to predict the maximum steady-state temperature of gear meshing under dry operation conditions,the research method of temperature distribution on the tooth surface of curved plastic gear with small modulus was put forward,and the influence of different speed and load on the maximum steady-state temperature of gear meshing was analyzed.[Methods]The finite element numerical model of the temperature field of the gear was established based on the precise three-dimensional model of the polyoxymethylene(POM)material temperature-modulus effect combined with the curve configuration of the small modulus gear.The meshing temperature test of curved configuration POM gear pair under dry operation condition was carried out,and the test results were compared with the finite element results to verify the accuracy of the prediction model.[Results]The results show that the temperature difference of the tooth body is large under dry operation conditions,the maximum temperature distribution is in the middle of the meshing zone of the single tooth on the first contact trace of the curved gear configuration,and the maximum steady-state temperature difference of gear pair meshing and the steady-state temperature difference of the master-slave drive wheel test gradually increase with the increase of speed and load.The test results are in good agreement with the model prediction results,and the maximum error between the maximum steady-state temperature of the tooth body and the test results is no more than 6.35%.The study can provide support for the long-term service application design of small-modulus plastic gear based on curve configuration.