电动助力转向系统蜗轮蜗杆摩擦异响研究

Research on Friction Noise of Worm Wheel and Worm in Electric Power Steering System

电动助力转向系统异响是影响车辆NVH水平的重要组成部分,研究转向系统异响具有重要意义。文章以电动助力转向系统中蜗轮蜗杆为例,阐述了解决转向管柱摩擦异响的主要思路,形成了系统的摩擦异响管控方法。并针对电动转向管柱摩擦异响的特点及产生原因进行了说明,重点介绍了转向管柱蜗轮尺寸控制的关键点、蜗杆尺寸优化、蜗轮材料的选用、润滑脂的选择以及蜗轮蜗杆装配工艺等内容。通过文章的研究,对汽车转向异响控制有一定的参考意义和工程实用价值。

Abnormal noise of electric power steering system is an important component of affecting vehicle NVH level. It is important to study abnormal nose in steering system. In this paper, the worm gear in electric power steering system is taken as an example, and the main ideas to solve the friciton noise of steering string are expounded, and a control method of friciton noise is formed. According to the characteristic and cause of abnormal friction noise of electric steering string, the paper illustrates. The key points of worm wheel size control, worm size optimazation, selection of worm gear material, choice of grease,worm gear and worm assembly process and so on. It has certain reference signficance and practical valve of automobile steering control.