Discussion of flexible shaft versus rigid shaft electric machines for petroleum and chemical plants

Journal Article · Wed Apr 01 00:00:00 EST 1992 · IEEE Transactions on Industry Applications (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:6933185

Hamer, P S ^[1]

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1. Chevron Research and Technology Co. (United States)

This book discusses flexible shaft versus rigid shaft electric machines for petroleum and chemical plants. A user of an electric machine will have a difficult time relating to the rigid bearing critical'' given in this paper as the determining definition for a rigid shaft'' machine. A rotor with an operating speed below its first system resonant speed, while mounted on its foundation, should be called rigid''or stiff'' shaft. The modern trend of motors is to have long and slender rotors with a low shaft height. Many 3600-r/min induction motors become flexible rotor'' design (i.e. not stiff'' by the definition given in the above paragraph) above a rating of approximately 800 to 1500. In conclusion the following are observation of a rotor designed to operate above its first system resonant speed: If the manufacturer does not process the rotor carefully during fabrication, balance shifts, which are difficult to correct or predict can occur. Balance of the rotor is more difficult, usually requiring the ability to add balance weight at the center of the rotor to correct the static unbalance component. Rated-temperature test of the machine, on a factory test stand, is the best way to prove the rotor thermal stability'' and to avoid field problems.

• OSTI ID: 6933185
• Journal Information: IEEE Transactions on Industry Applications (Institute of Electrical and Electronics Engineers); (United States), Vol. 28:2; ISSN 0093-9994
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
02 PETROLEUM
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CHEMICAL PLANTS
POWER SYSTEMS
ELECTRIC MOTORS
DESIGN
PETROLEUM INDUSTRY
PERFORMANCE TESTING
PLANNING
ROTORS
INDUSTRIAL PLANTS
INDUSTRY
MOTORS
TESTING
240100* - Power Systems- (1990-)
020000 - Petroleum
400000 - Chemistry