Generator rotor with ring key that reduces tooth top stress

Details Generator rotor with ring key that reduces tooth top stress Generator rotor with ring key that reduces tooth top stress

1997-03-17

1999-01-19

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310215, 310270, 310271, H02K 348

Patent

active

058616985

ABSTRACT:
A generator rotor that reduces friction force transmitted to rotor teeth by a retaining ring is disclosed. The friction force is caused by end windings pushing longitudinally outward against the retaining ring when the windings heat up during operation of the rotor. A ring key diminishes the friction force transmitted to a rotor teeth region by transmitting more of the friction force to a rotor pole region. The present invention accomplishes this reduction in transmission by either forming a gap between the ring key and the teeth regions, by producing only light contact between the ring key and the teeth regions, by the ring key being formed of a lower stiffness material in the areas in which it contacts the teeth regions, or by a combination of the above.

REFERENCES:
patent: 4197476 (1980-04-01), Borgen et al.
patent: 4316114 (1982-02-01), Zagorodnaya et al.
patent: 5113114 (1992-05-01), Shih et al.
patent: 5118979 (1992-06-01), Shih et al.
patent: 5174011 (1992-12-01), Weigelt
patent: 5430340 (1995-07-01), Shih
patent: 5493462 (1996-02-01), Peter
patent: 5592039 (1997-01-01), Guardiani

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