Evaporative cooled collector rings for dynamoelectric machine

Claim 2

In a dynamoelectric machine of the type having collector rings disposed on a shaft and electrically connected to leads within the shaft, the improvement comprising: a hub portion insulated from the shaft; an axially extending overhanging portion having an outer surface adapted for rubbing electrical contact with brushes; a rotating first ring attached to said overhanging portion and extending radially inward therefrom to provide a liquid dam; a sleeve member surrounding said shaft portion and extending between said first ring and the shaft and having a stationary second ring member thereon extending radially outward and adapted to provide a rotating seal with liquid confined by said first ring; liquid supply conduit means comprising passageways inside said inside said sleeve and discharging into said overhanging collector ring portion; vapor removal conduit means including an annular passage defined between the sleeve and the shaft and conducting vapor away from the collector.

Claim 3

The combination according to claim 1, wherein said second ring defines an annular feed passage with a circumferential outlet disposed inward of the radially outermost periphery of the second ring and also disposed on the side thereof toward the hub.

Claim 4

The combination according to claim 1, and further including a rotating third ring member having axial passages therethrough and extending radially inward from said overhanging portion and spaced from said first ring to define a sealing chamber therebetween, said second ring extending into said sealing chamber.

Claim 5

The combination according to claim 1, wherein said collector ring further defines a liquid tight annular chamber on the opposite side of said hub portion from the overhanging portion, said hub portion defining first axial passages for admitting liquid to said annular chamber and second axial passages for conducting vapor from said annular chamber back through the hub portion.

Claim 6

In a dynamoelectric machine of the type having first and second collector rings disposed on a shaft and electrically connected to leads within the shaft, the improvement comprising: first and second collector ring hub portions insulated from the shaft and spaced axially from one another; first and second axially extending overhanging portions on the respective hubs extending toward one another and having first and second outer surfaces adapted for rubbing contact with brushes; a sleeve surrounding the shaft to define an annular passage therewith and having its opposite ends extending under said respective overhanging portions; first and second rotating ring members attached to the respective overhanging portions to define rotating liquid chambers beneath the overhanging portions; first and second stationary ring members disposed on opposite ends of the sleeve and extending into the rotating liquid chambers to provide liquid seals; an annular steam collection chamber sealing disposed about the sleeve between said collector ring; means to feed liquid in opposite directions through the sleeve to the rotating liquid chambers; and passage means through the sleeve connecting said annular steam collection chamber with said annular passage between sleeve and shaft.

Claim 7

In a dynamoelectric machine of the type having first and second collector rings disposed on a shaft and electrically connected to leads within the shaft, the improvement comprising: first and second collector ring hub portions insulated from the shaft and spaced axially from one another; first and second axially extending overhanging portions on the respective hubs extending toward one another and having first and second outer surfaces adapted for rubbing contact with brushes; a sleeve surrounding the shaft to define an annular passage therewith and having its opposite ends extending under said respective overhanging portions; first and second rotating ring members attached to the respective overhanging portions to define rotating liquid chambers beneath the overhanging portions; first and second stationary ring members disposed on opposite ends of the sleeve and extending into the rotating liquid chambers to provide liquid seals; an annular steam collection chamber sealing disposed about the sleeve between said collector ring; means to feed liquid in opposite directions through the sleeve to the rotating liquid chambers; and passage means through the sleeve connecting said annular steam collection chamber with said annular passage between sleeve and shaft.