| Citation: | LI Qingzhan, LI Shuangxi, ZHENG Rao, et al. Sensitive parameters affecting performance of three-petal high-speed floating-ring seal[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(3): 571-578. doi: 10.13700/j.bh.1001-5965.2019.0248(in Chinese)
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In view of the three-petal high-speed floating-ring seal (TFRS) applied in liquid rocket engine, the leakage and wear characteristics of the seal under complex and changeable conditions are revealed, and the sensitive parameters affecting the sealing characteristics are obtained, which promotes the development of high-speed seal technology. According to the key parameters of pressure, rotational speed and circumferential spring specific pressure of the seal, the leakage rate of TFRS was simulated numerically, and the leakage rate and wear rate of TFRS were measured experimentally. The analysis results show that the leakage rate and wear rate increase with the increase of pressure. Speed is sensitive to TFRS wear rate and insensitive to TFRS leakage rate. With the increase of speed, wear rate increases rapidly and leakage rate decreases slowly. With the increase of spring specific pressure of the seal, the earlier spring specific pressure of the seal are the sensitive parameters affecting the leakage rate. At this time, the leakage rate changes greatly and the wear rate changes slightly. The later spring specific pressure of the seal are the sensitive parameters affecting the wear rate. At this time, the wear rate changes greatly and the leakage rate changes slightly. The leakage rate and wear rate are smaller in the appropriate range of spring specific pressure of the seal. The research results provide a basis for the design, application and in-depth study of TFRS for liquid rocket engines.
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