Spring cartridge rotor bearing

Details Spring cartridge rotor bearing Spring cartridge rotor bearing

H - Electricity

02

K

H02K 7/08 (2006.01) E21B 4/00 (2006.01) E21B 43/12 (2006.01) F04B 47/00 (2006.01) F16C 17/12 (2006.01) F16C 27/02 (2006.01) H02K 5/132 (2006.01)

Patent

CA 2210614

A spring cartridge rotor bearing is inserted into an electric motor during assembly as a preassembled unit. The rotor bearing includes a sleeve having a bore adapted to receive therethrough a shaft of the electric motor, and each end of the sleeve adapted to contact adjacent motor rotor sections. A bearing has a bore extending therethrough with the sleeve received therein. The bearing thermally locks into the stator bore early in motor warm-up and the bearing has sufficient end play on the sleeve to accommodate shaft expansion. One or more springs are located on the sleeve to bias the bearing to a neutral or generally centered position on the sleeve. The springs permit the bearing to move along the sleeve during times of thermal expansion and contraction, and prevent the bearing from becoming locked into an extreme position. This prevents the transmission of thrust loads from the rotor to the bearing.

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