Title :
Acoustic resonance in electric machines
Author_Institution :
Hochschule fur Tech. und Wirtschaft des Saarlandes, Saarbrucken, Germany
Abstract :
A seldom observed phenomenon of acoustic resonance which led to the mechanical destruction of two radial fans in series in a Swiss made synchronous generator at a power plant in India is described in this paper. An axially vibrating impeller along with stiff diffuser acted as a source of pure tones that came into resonance with hydrogen in the cooler, resulting in a fan blow up. It is shown in the paper how some crucial data that help quantify this phenomenon can be restored, knowing no more about construction details of the machine than the Swiss manufacturer published in their advertising brochures.
Keywords :
acoustic resonance; cooling; finite element analysis; machine theory; synchronous motors; vibrations; Switzerland; acoustic resonance; axially vibrating impeller; electric machines; fan blow up; mechanical destruction; power plant; pure tones; radial fans; stiff diffuser; synchronous generator; Blades; Circuits; Electric machines; Fans; Impellers; Kinetic energy; Resonance; Shafts; Stators; Turbogenerators;
Conference_Titel :
Industry Applications Conference, 2001. Thirty-Sixth IAS Annual Meeting. Conference Record of the 2001 IEEE
Conference_Location :
Chicago, IL, USA
Print_ISBN :
0-7803-7114-3
DOI :
10.1109/IAS.2001.955397
