Volume 29 Issue 3
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LIU Ben-wu, WANG Jian-jun, SUI Xue-bing. Structure optimization of a certain type of gas turbine sealing disk[J]. Journal of Aerospace Power, 2014, 29(3): 563-570. doi: 10.13224/j.cnki.jasp.2014.03.012
Citation: LIU Ben-wu, WANG Jian-jun, SUI Xue-bing. Structure optimization of a certain type of gas turbine sealing disk[J]. Journal of Aerospace Power, 2014, 29(3): 563-570. doi: 10.13224/j.cnki.jasp.2014.03.012
shu

Structure optimization of a certain type of gas turbine sealing disk

doi: 10.13224/j.cnki.jasp.2014.03.012

  • 1. School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;

  • 2. Shenyang Liming Aero-Engine (Group) Corporation Limited, Aviation Industry Corporation of China, Shenyang 110043, China

  • Received Date: 2013-09-27
  • Publish Date: 2014-03-28
    Abstract
  • To systematically study the crack failure of the pressure-balanced holes on sealing disk,and increase the fatigue life of a certain type of gas turbine, failure phenomenon and local structural modification of sealing disk were analyzed. Finite element analysis model was established and the vibration stress distribution features and resonance characteristics were analyzed.From the analysis,it showed that the high static stress on edges of the pressure-balanced holes was the main cause of the fatigue crack and improvement measures were put forward.Structure strength comparison analysis were done based on the original structure and several local modifications to the pressure-balanced holes under assembly conditions,and finally the local structure modification scheme for sealing disk of a certain type of gas turbine was put forward. And then the stress on edges of the pressure-balanced holes reduced by 16%, the yield strength reserve coefficient increased from 0.891 to 1.069.

     

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