Based on the study of pressure pulsation fluid characterization, the present study investigates the impact generated by high-pressure pulsating fluid on pipeline fittings’ sealing characteristics. In the meanwhile, it analyzes the influence of the internal fluid pulsation amplitude and fluid pulsation at different pressures on pipeline fittings sealing characteristics. A comparative study on the research results demonstrate that due to the action characteristics of fluid pulsation, pipeline fittings sealing characteristics change periodically in pulsation period, and the change range of sealing contact area of pipeline fittings remains basically consistent with that of high stress area. Moreover, the sealing contact area and high stress area of pipeline fittings increase when fluid pulsation amplitude increases. By maintaining fluid pressure constant, the maximum sealing area of pipeline fittings is slightly larger than that of pipeline fittings under no pressure condition during the pulsating period. In addition, the area of high stress area changes significantly.

在研究压力脉动流体特性的基础上，本研究研究了高压脉动流体对管道配件密封性能的影响。同时，分析了不同压力下内部流体脉动幅度和流体脉动对管道配件密封性能的影响。对研究结果的比较研究表明，由于流体脉动的作用特性，管道配件的密封特性在脉动周期内周期性变化，管道配件的密封接触面积的变化范围与高应力区域的变化范围基本保持一致。此外，当流体脉动幅度增加时，管道配件的密封接触面积和高应力面积也会增加。通过保持流体压力恒定，在脉动期间在无压力条件下，管道配件的最大密封面积略大于管道配件的最大密封面积。另外，高应力区域的面积发生显着变化。