螺旋升降机蜗杆传动机构啮合力的仿真研究

Research on Meshing Force Simulation of Worm Transmission Mechanism for Screw Jack Mechanism

以某螺旋升降机的蜗杆传动机构为研究对象,利用三维实体设计软件Solid Works建立该机构的实体模型,并导入多体动力学分析软件ADAMS。根据Hertz弹性撞击理论,在蜗轮蜗杆之间施加碰撞力,实现了蜗轮蜗杆的啮合。对蜗杆传动机构的啮合力进行研究,指出啮合力的周期性波动是造成其疲劳破坏的主要原因,提出可以通过降低啮合力的波动幅度来延长蜗杆传动机构的工作寿命和提高其工作精度的措施。同时,研究表明蜗杆传动机构啮合力的大小随着刚度系数以及蜗杆转速的增加而增大且波动幅度不断加剧。

The thesis takes the worm transmission mechanism of screw jack mechanism as the research ob- ject. The solid model of this mechanism is created using 3D design software SolidWorks and imported to ADAMS. Based on Hertz elasticity impact theory, contact force is built between worm gear and worm. Re- alize mesh process of worm gear and worm. Then research the meshing force of worm transmission mecha- nism. Point out that periodic fluctuation of meshing force is the main reason causing fatigue failure of worm transmission mechanism. Put forward the measure that prolong working life and improve accuracy of worm transmission mechanism through reducing the range of fluctuation. Besides research show that the stiffness and input speed of worm increasing, the meshing force increases and the fluctuation range aggravates.