电连接器用聚氨酯胶密封件贮存可靠性建模

doi:10.3901/JME.2024.20.361

机械工程学报 ›› 2024, Vol. 60 ›› Issue (20): 361-371.doi: 10.3901/JME.2024.20.361

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电连接器用聚氨酯胶密封件贮存可靠性建模

钱萍¹, 刘鑫雨¹, 陈文华¹, 王哲², 郭明达¹

1. 浙江理工大学机电产品可靠性分析与测试国家地方联合工程研究中心杭州 310018;
2. 北京控制与电子技术研究所北京 100038

收稿日期:2023-10-26 修回日期:2024-05-28 出版日期:2024-10-20 发布日期:2024-11-30
通讯作者: 陈文华,男,1963年出生,博士,教授,博士研究生导师。主要研究方向为可靠性设计、试验与统计分析。E-mail:chenwh@zstu.edu.cn
作者简介:钱萍,女,1983年出生,博士,副教授,硕士研究生导师。主要研究方向为机电产品的可靠性试验及其统计分析。E-mail:qianping@zstu.edu.cn
基金资助:
浙江省重点研发计划资助项目(2021C01133)。

Storage Reliability Modeling of Polyurethane Seals for Electrical Connectors

QIAN Ping¹, LIU Xinyu¹, CHEN Wenhua¹, WANG Zhe², GUO Mingda¹

1. National and Local Joint Engineering Research Center of Reliability Analysis and Testing for Mechanical and Electrical Products, Zhejiang Sci-Tech University, Hangzhou 310018;
2. Beijing Institute of Control and Electronic Technology, Beijing 100038

Received:2023-10-26 Revised:2024-05-28 Online:2024-10-20 Published:2024-11-30

摘要/Abstract

摘要： 针对长期贮存状态下导弹用电连接器的密封可靠性评估问题，通过对电连接器用聚氨酯胶密封件在贮存环境下的失效分析，确定了聚氨酯胶密封失效为内聚失效和边界失效共同引起的密封泄漏，揭示了聚氨酯胶在贮存环境下性能退化机制为环境温度和湿度引起聚氨酯胶内部的大分子基团氧化和水解；基于牛顿黏性定律和Roth密封理论，建立了结合内聚失效和边界破坏的气体泄漏数学表达式；基于分子动力学和质量作用定律，建立了聚氨酯胶密封件性能退化速率与温度、湿度之间的数学关系；以密封件气体泄漏率为性能指标，建立了融合温度和湿度的电连接器用聚氨酯胶密封件的性能退化轨迹模型；结合中心极限定理，建立了聚氨酯胶密封件贮存可靠性统计模型，可为评估电连接器用聚氨酯胶在贮存环境下的密封可靠性提供理论基础。

关键词: 电连接器, 密封失效, 聚氨酯胶, 可靠性建模

Abstract: On the issue of reliability assessment of electrical connectors for missiles in long-term storage environments. Failure analysis of polyurethane adhesive seals for electrical connectors in a storage environment. The polyurethane adhesive seal failure is identified as a seal leak caused by a combination of cohesive failure and boundary failure. The degradation mechanism of polyurethane adhesive in storage environment is the oxidation and hydrolysis of large molecular groups inside the polyurethane adhesive caused by temperature and humidity. Based on Newton's law of viscosity and Roth seal theory, a mathematical expression for gas leakage combining cohesive failure and boundary damage is established. Based on molecular dynamics and the law of mass action, the mathematical relationship between the performance degradation rate of polyurethane sealant and temperature and humidity is established. To establish the performance degradation trajectory of polyurethane adhesive seals for electrical connectors containing temperature and humidity, using the gas leakage rate of the adhesive seals as the performance index. Combined with the central limit theorem, a statistical model for the storage reliability of polyurethane adhesive seals is developed, it can provide a theoretical basis for evaluating the sealing reliability of polyurethane adhesive for electrical connectors in storage environments.

Key words: electrical connector, seal failure, polyurethane adhesive, reliability modeling

中图分类号:

TB114

钱萍, 刘鑫雨, 陈文华, 王哲, 郭明达. 电连接器用聚氨酯胶密封件贮存可靠性建模[J]. 机械工程学报, 2024, 60(20): 361-371.

QIAN Ping, LIU Xinyu, CHEN Wenhua, WANG Zhe, GUO Mingda. Storage Reliability Modeling of Polyurethane Seals for Electrical Connectors[J]. Journal of Mechanical Engineering, 2024, 60(20): 361-371.

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电连接器用聚氨酯胶密封件贮存可靠性建模

Storage Reliability Modeling of Polyurethane Seals for Electrical Connectors

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