Life prediction and reliability analysis of metal hard-sealed ball valves under high-temperature and high-pressure conditions
高温高压工况下金属硬密封球阀的寿命预测与可靠性分析

摘要

在高温高压工况下，金属硬密封球阀的工作环境极为复杂，面临着密封性能退化、磨损、腐蚀等多重影响因素，导致其寿命及可靠性具有较大的不确定性。本文通过建立金属硬密封球阀的寿命预测模型，结合高温高压工况下的实际工况，分析其可靠性，提出基于多种因素综合分析的寿命评估方法。通过实验数据与理论模型相结合的方式，针对阀体、密封面等关键部位的失效机理进行分析，最终为提高阀门的使用寿命与安全性提供理论依据和工程参考。

Abstract

Under high-temperature and high-pressure conditions, the working environment of metal hard-sealed ball valves is extremely complex. They are subject to multiple influencing factors such as degradation of sealing performance, wear, and corrosion, resulting in significant uncertainty in their service life and reliability. This paper establishes a life prediction model for metal hard-sealed ball valves, analyzes their reliability by combining actual operating conditions under high-temperature and high-pressure environments, and proposes a life evaluation method based on comprehensive analysis of multiple factors. Through the integration of experimental data and theoretical models, the failure mechanisms of key components such as valve bodies and sealing surfaces are analyzed. Ultimately, this study provides a theoretical basis and engineering reference for improving the service life and safety of valves.