Performance Analysis of Carbon-carbon Composite Rotating Finger Seal

doi:10.3901/JME.2018.19.102

Abstract

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

CLC Number:

V232
TH122

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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