Anti-loosening performance of wedge washers under vibration

被引：0
|
作者：
Liu J. [1 ]
Gong H. [1 ]
Ding X. [1 ]
机构：
[1] School of Mechanical Engineering, Beijing Institute of Technology, Beijing
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2019年 / 38卷 / 05期
关键词：
Anti-loosening; Finite element analysis; Negative feedback adjusting; Vibration; Wedge washer;
D O I：
10.13465/j.cnki.jvs.2019.05.006
中图分类号：
学科分类号：
摘要：
Screw-thread looseness is one of important factors to affect reliability and safety of mechanical products. Wedge washers are a type of anti-loosening products with a special structure to receive more and more attentions in industry. However, its anti-loosening mechanism is not fully revealed. Here, the method of finite element simulation combined with test analysis was used to evaluate the anti-loosening performance of wedge washers under vibration. The wedge washers' anti-loosening mechanism was analyzed from views of positive feedback adjustment and negative one. The effects of wedge angle, washer outer diameter, friction coefficient and material properties on wedge washers' anti-loosening performance were systematically investigated. The results showed that wedge washers have a good anti-loosening performance under vibration because the use of wedge washer causes increase in preload, decrease in slip area on flank of thread and looseness-weakening, and this is a process of negative feedback adjustment to make loosening be stopped and preload be unchanged; the larger the wedge angle, washer outer diameter and material stiffness, the better the anti-loosening performance of wedge washers; friction coefficient on upper and lower radial tooth surface is also an important factor to affect wedge washers' anti-loosening performance; to ensure wedge washers' anti-loosening performance, the friction coefficient on upper and lower radial tooth surface is 0.06 larger at least than the friction coefficient of upper and lower washers be; the reliability of the simulation results is verified with transverse vibration tests. © 2019, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：38 / 44and70
页数：4432
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