Based on the meshing contact line theory of helical gears,the influence of center distance error on the dynamic characteristics of helical gears is analyzed.Taking a pair of subway helical gears as the research object,firstly,the slicing method and the potential energy method are used to calculate the time-varying meshing stiffness and dynamic transmission error of the helical gears under the center distance error;then,the lumped mass method is used to establish the bending-torsional-axis helical gear dynamics.model to analyze the dynamic meshing characteristics of the helical gear system;finally,the effects of different center distance errors on the time-varying meshing stiffness,dynamic meshing force and vibration characteristics of the helical gear are studied.The research results show that the time-varying meshing stiffness of the helical gear decreases as the center distance error increases;the average dynamic meshing force of the helical gear fluctuates less with the change of the center distance error,and the center distance error will cause the gear meshing stability to decrease,as Provide reference for vibration and noise reduction of gear system.
center distance deviationTVMSgear dynamicsdynamic characteristics
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