| 摘要 |
PCT No. PCT/NL90/00050 Sec. 371 Date Sep. 21, 1991 Sec. 102(e) Date Sep. 21, 1991 PCT Filed Apr. 19, 1990 PCT Pub. No. WO90/13937 PCT Pub. Date Nov. 15, 1990.An electric machine has self-contained spare bearings located between two or more rotors and mounted on a common shaft consisting of one piece. The spare bearings are fixed on a shaft bush by their respective inner rings, and slid into a position adjacent to the original bearings between each rotor driving the common shaft. Upon the failure of the original bearings, the spare bearings are slid into the position of the original bearings, thereby allowing the electric machine to continue to operate.
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