Prevention of particle accumulation between rotatable components

Details Prevention of particle accumulation between rotatable components Prevention of particle accumulation between rotatable components

1996-09-03

1999-09-28

Enad, Elvin G.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 67R, 310 68R, 310 87, 310 90, 417405, 417406, 417408, H02K 900

Patent

active

059593806

ABSTRACT:
An electrical machine, such as an electric motor, generator or torquer-generator, includes a relatively rotatable cylindrical armature and magnetic pole structure separated by an annular gap into which a surrounding fluid may flow during operation of the machine. In order to prevent the build-up of deposited solid material in the gap between the components, one of the components is provided at its surface with a narrow elongate projection which extends helically along and around the surface. The height of the projection is slightly less than the gap between the components so that it remains out of contact with the surface of the other component so as not to frictionally engage it and interfere with relative rotation between the components.

REFERENCES:
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patent: 4553857 (1985-11-01), Ney
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patent: 5184945 (1993-02-01), Chi-Wei
patent: 5220231 (1993-06-01), Veronesi et al.
patent: 5275238 (1994-01-01), Cameron
patent: 5295810 (1994-03-01), Heijnen
L.P. Ludwig et al. "hermetically sealed pump" Mechanical Engineering (Inc. Cime) vol. 91, No. 12, Dec. 1969, New York.

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