碳/碳复合材料旋转指尖密封性能分析

doi:10.3901/JME.2018.19.102

机械工程学报 ›› 2018, Vol. 54 ›› Issue (19): 102-110.doi: 10.3901/JME.2018.19.102

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碳/碳复合材料旋转指尖密封性能分析

韩海涛, 陈国定, 苏华, 赵海林

西北工业大学机电学院西安 710072

收稿日期:2017-04-15 修回日期:2017-11-04 出版日期:2018-10-05 发布日期:2018-10-05
通讯作者: 陈国定(通信作者),男,1956年出生,博士,教授,博士研究生导师。主要研究方向为润滑与密封技术、机电系统热分析和现代机械设计理论与方法。E-mail:gdchen@nwpu.edu.cn
作者简介:韩海涛,男,1990年出生。主要研究方向为机械系统密封与润滑。E-mail:hanhaitao@mail.nwpu.edu.cn
基金资助:
国家自然科学基金资助项目（51575445）。

Performance Analysis of Carbon-carbon Composite Rotating Finger Seal

HAN Haitao, CHEN Guoding, SU Hua, ZHAO Hailin

School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072

Received:2017-04-15 Revised:2017-11-04 Online:2018-10-05 Published:2018-10-05

摘要/Abstract

摘要： 指尖密封是近年来研究较为广泛的一种密封形式，涉及的指尖密封多与静止部件连接而呈静止状（静止指尖密封），理论与试验研究围绕着密封泄漏和磨损性能改善而开展。提出旋转指尖密封的概念和结构，并利用碳/碳复合材料的良好自润滑性能，探索这一指尖密封新结构对泄漏性能改善的可能及机理。通过"外伸式"和"内伸式"旋转指尖密封有限元性能分析模型，分析了结构、工况以及材料参数等对两种旋转指尖密封性能的影响规律，与静止指尖密封密封性能的对比表明，外伸式旋转指尖密封具有在较高转速或跳动量下仍能维持平稳低泄漏率的特质，而内伸式旋转指尖密封的泄漏率却随着转速增大而增大，因而前者对于高速工况下的航空发动机转子密封更具应用潜质。并探索了旋转指尖密封在轴间密封工程应用的可行性，有助于航空发动机轴间密封新构型设计思路开拓、以及密封结构和性能设计的技术选择。

关键词: 磨损性能, 碳/碳复合材料, 泄漏性能, 指尖密封, 轴间密封

Abstract: Finger seal is widely studied in recent years, the referred finger seal is mostly installed in static component to behave stationary (static finger seal), the experimental and theoretical study is carried out in order to improve the seal leakage and wear performance. The concept of rotating finger seal is presented, the possibility and mechanism of the new structure of finger seal on leakage performance improvement by usage of the good self-lubricating property of carbon-carbon composite is explored. The finite element analysis models of outer and inner rotating finger seal are established, the effect of structural, operating and material parameters on the performance of rotating finger seal are studied, the performance comparison with static finger seal shows that the outer rotating finger seal could maintain stable low leakage rates on the condition of high speed or high radial run-out of rotor, while the leakage of inner rotating finger seal increases with increasing rotational speed, which means the outer rotating finger seal has a better potential in aero-engine rotor sealing under high speed. The study not only explores the feasibility of application of finger seal on the intershaft seal, but also contributes to the new configuration of aero-engine intershaft seal, and to the technology choices about the design of seal structure and performance.

Key words: carbon-carbon composite, finger seal, intershaft seal, leakage performance, wear performance

中图分类号:

V232
TH122

韩海涛, 陈国定, 苏华, 赵海林. 碳/碳复合材料旋转指尖密封性能分析[J]. 机械工程学报, 2018, 54(19): 102-110.

HAN Haitao, CHEN Guoding, SU Hua, ZHAO Hailin. Performance Analysis of Carbon-carbon Composite Rotating Finger Seal[J]. Journal of Mechanical Engineering, 2018, 54(19): 102-110.

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碳/碳复合材料旋转指尖密封性能分析

Performance Analysis of Carbon-carbon Composite Rotating Finger Seal

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