Rotary machine having water-resistant structure

Details Rotary machine having water-resistant structure Rotary machine having water-resistant structure

1996-05-21

1998-03-10

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 52, 310 59, 310 60A, 318477, 318480, 318484, H02K 718, H02K 5173, F16C 1908

Patent

active

057265119

ABSTRACT:
A labyrinth formed between a pulley and a housing of a rotary machine such as an alternator is arranged to have a plurality of differently-shaped air gaps. When the size of a first air gap between a belt guide of the pulley is .delta.1, the size of a second air gap formed between a cylindrical base portion of the pulley and a bearing box of the housing is .delta.2, a third air gap formed between a front wall and a flange portion of the bearing box is .delta.3 and a fourth air gap formed between a boss portion and a bearing seal member is .delta.4, the air gap is arranged to satisfy the following inequality: .delta.1<.delta.2, .delta.2>.delta.3, .delta.3>.delta.4.

REFERENCES:
patent: 5194770 (1993-03-01), Yoshioka et al.
patent: 5334097 (1994-08-01), Tatara et al.
patent: 5423304 (1995-06-01), Lawrence et al.

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