US 4,071,791 AGranted

Reverse flow cooled dynamoelectric machines with novel cooling system

AssigneeGeneral Electric Company

InventorsAnthony F. Armor, Casmer P. Stanwick

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Abstract

A reverse flow cooled dynamoelectric machine is provided with duplex gas coolers disposed in a side-by-side relationship. The coolers are baffled such that a portion of the gas flowing through both coolers is channeled to both the end portion of the rotor and to the stator and the body portion of the rotor so that both areas may be effectively cooled under reduced load operating conditions in the event of the failure of one of the coolers. In a preferred embodiment of the invention, first and second U-shaped baffles are disposed between the coolers and the inner walls of a removable dome, and a planar baffle engages adjacent free ends of the U-shaped baffles. The baffle components are dimensioned to ensure satisfactory flow of cooling gas to the body portion of the rotor. Aligned stator and rotor baffles are provided to segregate inlet zones and outlet zones in the gap between the stator and the rotor to better ensure effective cooling of the body portion of the rotor.

Claims5

Dependent claims

A reverse flow cooled dynamoelectric machine comprising:

a. a gas-tight casing containing cooling gas;
b. a stator core including radial passages for flow of gas;
c. a rotor defining a gas gap with the stator core and having a body portion and an end turn portion;
d. fan means mounted on said rotor for circulating cooling gas from said gas gap to gas coolers;
e. first and second gas coolers mounted in said casing in side-by-side relationship, said gas coolers communicating with an outlet of said fan means to receive and cool gas pumped therefrom;
f. first conduit means for conducting gas from both said first and second coolers to said rotor end turn portion;
g. second conduit means conducting gas from both said first and second coolers to said stator cooling passages and said rotor body portion;
and
h. baffle means disposed in said casing in abutting spaced relationship with both said coolers and extending radially outward from said coolers to an inner wall of said casing, said baffle means being shaped to direct a portion of the gas cooled by each of said coolers to both first and second conduit means, thereby ensuring a flow of cooling gas both to said stator and said body portion of said rotor and to said end turn portion of said rotor with only one of said coolers operating.

6 more elements

Dependencies are inferred from the claim text.