• 论文 •

### 影响三瓣式高速浮环密封性能的敏感参数

1. 1. 北京化工大学 流体密封技术研究中心, 北京 100029;
2. 西安航天动力研究所, 西安 710100
• 收稿日期:2019-05-22 发布日期:2020-03-28
• 通讯作者: 李双喜 E-mail:buctlsx@126.com
• 作者简介:李庆展,男,硕士研究生。主要研究方向:流体润滑与密封技术;李双喜,男,博士,副教授。主要研究方向:流体润滑与密封技术。
• 基金资助:
国家重点研发计划（2018YFB2000800）

### Sensitive parameters affecting performance of three-petal high-speed floating-ring seal

LI Qingzhan1, LI Shuangxi1, ZHENG Rao1, MA Wenjie1, ZHUANG Suguo2

1. 1. Research Center of Fluid Sealing Technology, Beijing University of Chemical Technology, Beijing 100029, China;
2. Xi'an Aerospace Propulsion Institute, Xi'an 710100, China
• Received:2019-05-22 Published:2020-03-28
• Supported by:
National Key R&D Program of China (2018YFB2000800)

Abstract: 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.