考虑箱体刚度耦合的齿形修整研究

Modifying Gear Shape Coupled with Housing Stiffness

为提高齿轮的啮合质量,提出了考虑箱体刚度的齿轮修形参数确定方法。建立齿轮轴刚度简化算法,求解齿轮轴弯扭组合变形,确定齿向修形参数初值。在ANSYS中建立带轴段的齿轮接触分析模型,对齿轮啮合刚度做有限元仿真,综合齿向修形确定齿廓修形参数初值。给出箱体刚度阵的简化提取方法确定箱体变形,并耦合到齿轮轴上,以齿面载荷均布为目标优化齿轮修形参数。仿真效果显示:修形后的齿面载荷分布改善明显,验证了修形参数确定方法的有效性。

To improve tooth pair meshing quality,we propose a method for determining the parameters for gear shape modification,which takes the housing stiffness into consideration.We establish the simplification algorithm for calculating gear shaft bending and torsional stiffness so as to determine the initial values of parameters of the longitudinal gear shape modification.We use the ANSYS to establish the finite element model for analyzing the contact of gears with a shaft.Using the finite element model,we simulate the gear meshing stiffness and determine the initial values of the parameters of involute modification and longitudinal modification without considering housing stiffness.Finally we propose our simplification algorithm for extracting the housing stiffness matrix,which is then coupled with the gear shaft,thus optimizing the gear shape modification parameters coupled with housing stiffness.The simulation results show that our method can greatly improve the load distribution on tooth surface,indicating that our method is effective.