浮动环密封自锁位置的试验研究

推进技术 ›› 2019, Vol. 40 ›› Issue (4): 884-891.

浮动环密封自锁位置的试验研究

夏鹏¹,宣统²,周泽新¹,刘占生¹

哈尔滨工业大学能源科学与工程学院，黑龙江哈尔滨 150000,西安航天动力研究所，陕西西安 710000,哈尔滨工业大学能源科学与工程学院，黑龙江哈尔滨 150000,哈尔滨工业大学能源科学与工程学院，黑龙江哈尔滨 150000

发布日期:2021-08-15
基金资助:
国家重大基础研究项目(613321)；国家自然科学基金(11572098)。

关键词:浮动环密封; 锁死位置; 振动; 转子

School of Energy Science and Engineering，Harbin Institute of Technology，Harbin 150000，China,Xi’an Aerospace Propulsion Institute，Xi’an 710000，China,School of Energy Science and Engineering，Harbin Institute of Technology，Harbin 150000，China and School of Energy Science and Engineering，Harbin Institute of Technology，Harbin 150000，China

Published:2021-08-15

摘要/Abstract

摘要： 浮动环密封被应用于液体火箭涡轮泵中，阻隔高压工质的泄漏。为了研究浮动环密封的运动特性和自锁位置的分布规律，开展试验研究，详细地展示了试验装置的原理和试验步骤。试验结果表明，间隙流体激励推动浮动环密封向转子靠近，转子的涡动运动使浮动环密封更加靠近转子涡动中心。压差恒定时，转子振动幅度决定浮动环密封能否自锁，自锁位置依赖于压差、转子振动的变化过程。试验中，自锁位置距离转子涡动中心的最小距离小于10μm。

关键词: 浮动环密封; 锁死位置; 振动; 转子

Abstract: Floating ring seals are used in the turbopump of liquid rocket engines to prevent the leakage between the chambers with high-pressure drops. To investigate the dynamic characteristics and the lock-up position of the floating ring seal， a test rig is developed in present study and the structure of the test rig and the experiment procedure are detailed in this study. The test results show that the hydrodynamic force in the seal clearance pushes the floating ring seal to approach the rotor， and the rotor whirling motion makes the floating ring seal close to the rotor whirling center. Under the constant pressure drop， the whirling amplitude of the rotor determines the lock-up ability of the floating ring seal， and the lock-up position depends on the trainset process of the variety for the pressure drop and the rotor vibration. In the test， the minimum distance between the lock-up position and the rotor whirling center is smaller than 10μm.

Key words: Floating ring seal；Lock-up position；Vibration；Rotor

夏鹏,宣统,周泽新,刘占生. 浮动环密封自锁位置的试验研究[J]. 推进技术, 2019, 40(4): 884-891.

XIA Peng¹,XUAN Tong²,ZHOU Ze-xin¹,LIU Zhan-sheng¹. 关键词:浮动环密封; 锁死位置; 振动; 转子[J]. Journal of Propulsion Technology, 2019, 40(4): 884-891.

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