水下航行器主轴动密封试验装置设计与性能试验

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DOI：10.19981/j.CN23-1581/G3.2026.12.030

中图分类号：TH136

文献标志码： A

文章编号：2095-2945（2026）12-0120-04

Abstract： To address the issue of predicting the dynamic sealing performance and service life of the main shaft of underwater vehicles， a dynamic sealing test device was designed to simulate extreme underwater working conditions， such as high rotational speed， high pressure， and instantaneous start-stop operations. By examining the dynamic evolution of friction， wear， and leakage at the sealing interface， the degradation failure threshold of dynamic sealing performance and the factors influencing sealing life were analyzed. The results indicate that the service life of a dual-seal ring configuration is approximately 20.8 hours， while that of a single-seal ring is about 16.5 hours. The dual-seal ring design extends the service life by 20.6% compared to the single-seal ring， demonstrating that increasing the number of seals enhances the structural service life. The life of the 5.8B specimen with a compression rate of 18.2% is 23% longer than that of the 6B specimen with a compression rate of 24.2%， and the life of the 5.8C specimen is 89% longer than that of the 6C specimen. This shows that adjusting the compression rate of the seal rings according to actual working conditions can effectively extend their service life. The sealing structure with a retaining ring can ensure the coaxiality of the seal ring. The structure is highly stable and can significantly improve the life of the structure; sealing medium pressure has an effect on torque only under static starting conditions. The greater the sealing medium pressure， the greater the starting torque; under dynamic working conditions， the sealing operation will reach a dynamic balance state. At this time， the sealing medium pressure has less impact on the dynamic sealing structure and less impact on the service life of the seal ring.

Keywords： underwater vehicle; dynamic sealing; universal plug ring; dynamic seal test device; seal ring life

水下航行器（UUV）主轴动密封系统是动力传输可靠性与航行安全的关键，其寿命直接决定设备维护周期与服役效能。（剩余4359字）