Numerical and experimental study on adaptive concentric performance of a new type of floating convergent pocket seal

SUN Dan; WANG Ping; ZHAO Huan; ZHANG Guochen; XIAO Zhonghui; MENG Jigang

doi:10.7527/S1000-6893.2019.23270

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2020 , Vol. 41 >Issue 3: 423270 - 423270

DOI: https://doi.org/10.7527/S1000-6893.2019.23270

Material Engineering and Mechanical Manufacturing

Numerical and experimental study on adaptive concentric performance of a new type of floating convergent pocket seal

SUN Dan ,
WANG Ping ,
ZHAO Huan ,
ZHANG Guochen ,
XIAO Zhonghui ,
MENG Jigang

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1. Key Laboratory of Advanced Measurement and Test Technology for Aviation Propulsion System, Liaoning Province, School of Aero-engine, Shenyang Aerospace University, Shenyang 110136, China;
2. Collaborative Innovation Center of Machine Manufacturing in Liaoning, Shenyang Blower Works Group Company Limited, Shenyang 110142, China

Received date: 2019-07-05

Revised date: 2019-11-18

Online published: 2019-11-07

Supported by

National Natural Science Foundation of China(51675351); China Postdoctoral Science Foundation(2018M633572);College Innovation Talent Support Program of Liaoning Province(LR2016033)

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Abstract

A new type of floating convergent pocket seal structure is proposed, a numerical solution model of new convergent pocket seal is established, the distribution law of circumferential pressure of new convergent pocket seal is studied, and the influence of import/export pressure ratio and eccentricity on the leakage and floating concentric force of new convergent pocket seal are analyzed. The experimental platform of floating self-concentric seal is designed and constructed. On the basis of the mutual verification of the numerical calculation results and the experimental test results, the influence of import/export pressure ratio and eccentricity on the leakage and adaptive concentric performance of the new floating convergent pocket seal was studied. The results show that, under the working conditions, the floating concentric force of the new convergent pocket seal is 8.9-10.9 times that of the traditional labyrinth seal. Under different import/export pressure ratios and eccentricities, the traditional floating labyrinth seal is always in the initial eccentric position and the adaptive concentric performance is poor. The new floating convergent pocket seal moves in the rotor axis direction, with the increase of import/export pressure ratio and eccentricity, the floating response time is shortened and the adaptive concentric performance is enhanced. The new type of floating convergent pocket seal has good floating response characteristics and adaptive concentric performance.

Key words： floating convergent pocket type seal; eccentricity; floating concentric force; floating response characteristics; adaptive concentric performance

Cite this article

SUN Dan , WANG Ping , ZHAO Huan , ZHANG Guochen , XIAO Zhonghui , MENG Jigang . Numerical and experimental study on adaptive concentric performance of a new type of floating convergent pocket seal[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020 , 41(3) : 423270 -423270 . DOI: 10.7527/S1000-6893.2019.23270

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