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[期刊论文]

Contact analysis of steam turbine blades with fin heaves

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Author:

Qin, Fei (Qin, Fei.) (Scholars:秦飞) | Li, Ying (Li, Ying.) | Zhang, Hong-Tao (Zhang, Hong-Tao.)

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EI Scopus PKU CSCD

Abstract:

For rotating blades with fin heaves used in steam turbines, large deflection and contact effects must be taken into account. By using 3-D finite element model and the augmented Lagrangian formulation, contact pressure between fin heaves is analyzed. Contact friction considered, the relation curve of the contact pressure vs. rotating speed is obtained and intrinsic frequencies of blades at 3000 r/min are calculated. Calculating results show that two neighbored fin heaves become to contact at rotating speed of 400 r/min. After this, contact pressure increases steadily as the rotating speed increases. However, as the speed reaches 1825 r/min, increasing of the contact pressure becomes to slow down apparently. At 3000 r/min, the contact pressure reaches its maximum of 700 MPa and the contact area is about 1/4 of the design contact area.

Keyword:

Turbomachine blades Steam turbines Mathematical techniques Friction Three dimensional Finite element method Calculations

Author Community:

  • [ 1 ] [Qin, Fei]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100022, China
  • [ 2 ] [Li, Ying]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100022, China
  • [ 3 ] [Zhang, Hong-Tao]Beijing Turbo and Electric-Engine Limited Company, Beijing 100039, China

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Source :

Journal of Beijing University of Technology

ISSN: 0254-0037

Year: 2005

Issue: 6

Volume: 31

Page: 566-569

Cited Count:

WoS CC Cited Count:

30 Days PV: 2

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