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Exact Solution of Radial Displacement and Stress of Rotating Elastic Interference Fits

[+] Author Affiliations
Sheng Feng, Haipeng Geng, Baisong Yang, Lie Yu, Lihua Yang, Jian Zhou

Xi’an Jiaotong University, Xi’an, Shaanxi, China

Shiquan Zhao

Dongfang Turbine Company, Deyang, Sichuan, China

Paper No. GT2013-94270, pp. V07BT31A004; 9 pages
doi:10.1115/GT2013-94270
From:
  • ASME Turbo Expo 2013: Turbine Technical Conference and Exposition
  • Volume 7B: Structures and Dynamics
  • San Antonio, Texas, USA, June 3–7, 2013
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5527-0
  • Copyright © 2013 by ASME

abstract

Interference fits, which are widely used in flexible couplings, can transfer large torques while avoiding unbalance. Using the classic elastic plane stress theory, the equations of the rotating interference fits taking into account of the temperature changes are derived, and the exact solution of radial displacement and radial stress, hoop stress and tangential stress of the rotating interference fits are obtained, then taking the interference fits of the coupling for a high speed microturbomachinery as an example, the above solutions are plotted using the numerical method, and also Von Mises equivalent stress is calculated. It is found that there are significantly different for the radial displacements between the two cases of with/without taking into account the change of temperature under two kinds of parameters, one is rotating speed chosen as a parameter and other parameters keeps constant, the other is the inner radius of the shaft and rotating speed chosen as parameters.

Copyright © 2013 by ASME
Topics: Stress , Displacement

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