Dynamoelectric machine lubrication system and method of assembli

Details Dynamoelectric machine lubrication system and method of assembli Dynamoelectric machine lubrication system and method of assembli

1976-06-09

1977-10-25

Song, Robert R.

Cutlery

308132, 310 90, H02K 516, F16C 3374

Patent

active

040553701

ABSTRACT:
An illustrated lubrication arrangement substantially prevents end leakage oil from flowing along the shaft to an oil thrower, and also causes end leakage oil to recirculate through wicking material to a feed wick which in turn feeds oil to a bearing clearance. A feed wick includes a feeding portion that extends through a window in the bearing and contacts the shaft. This same wick includes recirculatory pick-up wicks that protrude into a capillary oil collection region at each end of the bearing. The pick-up wicks have a smaller cumulative effective axial length than the feeding tab of the wick. The pick-up wicks also contact the shaft, and they recirculate end leakage oil to the feeding tab because of gradients in oil content within the wicking that interconnects the pick-up wicks with the feeding tab. The pick-up wicks and feeding tab may actually be separate pieces, the capillary interstices of which communicate with each other.
One method includes positioning a feed wick so that it is pushed toward the shaft by its ends, and the material from which the feed wick is made will act as a beam which limits the amount of pressure between the shaft, feed wick, and pick-up tabs. Moreover, the wick structure preferably is sway-backed to facilitate assembly of the wick in the bearing lubrication cavity, and to establish a re-oiling cavity.

REFERENCES:
patent: 3164422 (1965-01-01), Shaffer et al.
patent: 3793543 (1974-02-01), Stokke
patent: 3885176 (1975-05-01), Cunningham

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