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Journal of Beijing University of Aeronautics and Astronautics. 2021, (10) Core

Judgment method of circumferential relative sliding of air film seal between shaftsChinese Full TextEnglish Full Text (MT)

HUANG Yuhui;SU Hua;CHENG Zhuoyi;HOU Guoqiang;School of Mechanical Engineering, Northwestern Polytechnical University;

Abstract: In order to predict whether there is relative sliding in the circumferential direction between the seal ring and the outer rotor in air film seal between shafts, a method for determining the circumferential sliding of air film seal between shafts considering centrifugal expansion effect is proposed. The mechanical mechanism of the circumferential sliding between seal ring and outer rotor is analyzed. The centrifugal expansion of seal ring and outer rotor is simplified into axisymmetric plane stress and axisymmetric plane strain. The influence of the difference of elastic deformation stiffness between seal ring and outer rotor on the expansion deformation and the connection relationship is calculated, and the critical sliding operating area between seal ring and rotor is obtained. The research method provides a prediction and guidance method for circumferential sliding of seal ring in engineering.
Keywords：

centrifugal expansion; elastic deformation; circumferential sliding; critical sliding speed; shaft seal;

  • DOI：

    10.13700/j.bh.1001-5965.2020.0366

  • Series：

    (C) Architecture/ Energy/ Traffic/ Electromechanics, etc

  • Subject：

    Aeronautics and Astronautics Science and Engineering

  • Classification Code：

    V23

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