| 摘要 |
<p>A spring cartridge rotor bearing is inserted into an electric motor during assembly as a preassembled unit. The rotor bearing includes a sleeve (52) having a bore adapted to receive therethrough a shaft (20) of the electric motor, and each end of the sleeve is adapted to contact adjacent motor rotor sections (22). A bearing (62) has a bore extending therethrough with the sleeve received therein. The bearing (62) thermally locks into the stator bore early in motor warm-up and the bearing has sufficient end play on the sleeve (52) to accommodate shaft expansion. One or more springs (68) are located on the sleeve to bias the bearing (62) 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. <IMAGE></p> |
