Drain cover for yoke of dynamic electric machine

Details Drain cover for yoke of dynamic electric machine Drain cover for yoke of dynamic electric machine

1990-06-13

1991-02-19

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 89, H02K 510

Patent

active

049946994

ABSTRACT:
A drain cover for covering a pair of draining ports which are formed in the bottom of a cylindrical horizontal yoke of a dynamic electric machine at a distance from each other in the circumferential direction of the yoke. The drain cover has a box-like structure composed of a substantially rectangular bottom wall having an area large enough to cover a space under the draining ports, a pair of circumferentially extending side walls projecting upward from both axial end edges of the bottom wall into contact with the outer peripheral surface of the yoke, a pair of axially extending side walls projecting upward from both circumferential end edges of the bottom wall into contact with the outer peripheral surface of the yoke, discharge openings formed in the lower central portions of the circumferentially extending side walls, a pair of shield walls protruding upright from the bottom wall and opposing each other in the axial direction across the draining ports, and discharge openings formed in the lower central portions of the shield walls. The discharge openings in the circumferentially extending side walls and the discharge openings in the shield walls are sized such that each draining port, when viewed from the outside of the drain cover through a discharge opening in one of the circumferentially extending side walls, is hidden behind one of the shield walls which is adjacent to the one of the circumferentially extending side walls to prevent reverse flow of water into the machine.

REFERENCES:
patent: 4491754 (1985-01-01), Gotoh
patent: 4808871 (1989-02-01), Morishita
patent: 4945270 (1990-07-01), Okamoto

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