Apparatus and methods for controlling oil flow in electric motor

Details Apparatus and methods for controlling oil flow in electric motor Apparatus and methods for controlling oil flow in electric motor

1980-09-24

1983-08-02

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 61, 29598, 417372, H02K 900

Patent

active

043968481

ABSTRACT:
A method is disclosed of counteracting the tendency for oil to enter a compressor motor air gap. The method includes the provision of means that interrupt the normally smooth surface of a rotor to which oil would otherwise adhere. Either alternatively or additionally, a sweeping action is carried out for moving oil to stator slots adjacent to the motor air gap and thus out of the air gap. Departure from conventional rotor construction includes providing one or more grooves along the surface of the rotor. Grooves may be cut into rotor surfaces by a file or ball end mill. In other forms, grooves or dents may be coined or otherwise pressed into the rotor; or such grooves may be provided as a result of the configuration of the individual rotor laminations. The grooves may be disposed parallel to the rotor axis or disposed spiralled (clockwise and counterclockwise); and either one or a plurality of grooves may be provided.

REFERENCES:
patent: 2428634 (1947-10-01), Nordstrum
patent: 2605876 (1952-08-01), Becker
patent: 3075106 (1963-01-01), Chi
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patent: 3330031 (1967-07-01), Rediger et al.
patent: 3373690 (1968-03-01), Unger
patent: 3577024 (1971-05-01), Inagaki et al.
patent: 3586456 (1971-06-01), Giacosa
patent: 3600111 (1971-08-01), Rogers
patent: 3618337 (1971-11-01), Mount
patent: 3645112 (1972-02-01), Mount et al.

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