Explosion proof for electric motor

Details Explosion proof for electric motor Explosion proof for electric motor

1996-11-18

1998-05-19

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 52, 310 54, 310 55, 310 58, 310 59, 310 60A, 310 90, H02K 926

Patent

active

057539863

ABSTRACT:
A bearing 12 is provided on the end portion of a housing 30. This bearing 12 supports a shaft 14. A magnetic circuit 15, 16 for driving the shaft 14 is provided between the shaft 14 and the housing 30 with a gap 29 passing through in an axial direction. An entry route R1 for leading gas from the outside of the housing 30 to the gap 29 in the magnetic circuit 15, 16 and an exhaust route R2 for exhausting the gas to the outside of the housing 30 are provided so as not to reach the bearing 12. As a result, the lifespan of the electric motor can be lengthened, the startup time can be shortened, the number of parts can be reduced, the number of steps required for processing and assembly can be reduced, and the power loss can be decreased.

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patent: 5382858 (1995-01-01), Sugiyama
patent: 5424600 (1995-06-01), Ishikawa et al.
patent: 5605045 (1997-02-01), Halimi et al.

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