On-Line Thermal Balancing Technique for a Large Turbo-Generator

[+] Author and Article Information
M. Zumbach, G. Schweitzer

Mechatronics Lab, ETH Zurich, CH-8092 Zurich, Switzerland

K. Schoellhorn

Large Turbo-Generators Department, ABB Power Generation Ltd., CH-5401 Baden, Switzerland

J. Vib. Acoust 114(1), 60-66 (Jan 01, 1992) (7 pages) doi:10.1115/1.2930235 History: Received January 01, 1990; Online June 17, 2008


In this paper a new technique is proposed to rebalance automatically a large turbo-generator during operation. The sensitivity of the rotor unbalances to thermal asymmetries in the rotor is exploited by mounting some heating elements and using them as actively controlled actuators. The shaft vibrations are measured and used as input signals of the feedback controller. Unbalances thus can be compensated during rotor operation. A theoretical model of the thermo-elastic rotor has been developed and an appropriate closed-loop control system has been designed. The simulation results are verified on a special test rig with digital control allowing for varioius control strategies and various operating conditions.

Copyright © 1992 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.






Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In