Seismic-Induced Impeller/Blade Rubs in Rotating Power Plant Components

[+] Author and Article Information
J. Padovan, F. K. Choy, C. Batur, L. Canilang

Department of Mechanical Engineering, The University of Akron, Akron, OH 44325

J. Pressure Vessel Technol 110(4), 405-412 (Nov 01, 1988) (8 pages) doi:10.1115/1.3265623 History: Received June 29, 1988; Online November 05, 2009


During seismic or blade/impeller loss events, the potential for rubs in rotating nuclear and fossil fuel power plant components is quite high. Generally, such events involve interactions between blade/impeller tips and machinery components. This also includes the possibility of seal casing rubs. The paper will develop methodologies to: (i) evaluate the blade impeller-casing rub event; (ii) establish the associated stress, strain and force fields; (iii) enable signature analysis defining blade/impeller/seal particpation; and (iv) establish procedure enabling evaluation of blade/impeller/seal fatigue life. Additionally, the paper will present benchmarking examples of prototypical power plant components, i.e., feedwater pumps and steam turbines.

Copyright © 1988 by ASME
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