机电工程技术2024，Vol.53Issue(5)：100-102,3.DOI:10.3969/j.issn.1009-9492.2024.05.022
某导电塑料电位器失效分析及改进措施
Failure Analysis and Improvement Measures of a Conductive Plastic Potentiometer
卢炳 1张艳征1
作者信息
- 1. 中国空空导弹研究院,河南洛阳 471009
- 折叠
摘要
Abstract
A conductive plastic potentiometer has a zero displacement fault that does not recur.After failure analysis and mechanism analysis,it is found that the fault is caused by the formation of phosphate crystals inside the potentiometer due to the residual flux under the influence of temperature and humidity changes.The crystals are distributed at the contact area between the collector ring and the lower spring component,blocking the contact between the lower spring component and the collector ring,resulting in poor contact at the moving end and zero displacement.When the brush rotates a certain number of turns on the working surface of the collector ring,the phosphate crystals attached to the brush surface also detaches from the contact surface due to the movement of the brush,and the fault disappears,making it difficult to reproduce.Corresponding process improvement measures is proposed to avoid similar faults and the reliability of the product is improved.关键词
电位器/失效分析/改进措施Key words
potentiometer/failure analysis/improvement measures分类
信息技术与安全科学引用本文复制引用
卢炳,张艳征..某导电塑料电位器失效分析及改进措施[J].机电工程技术,2024,53(5):100-102,3.
