End gas gap baffle structure for reverse flow cooled dynamoelectric machine
AssigneeGeneral Electric Company
InventorsAnthony F. Armor, David H. Winne
Life of this patent
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Abstract
A reverse flow cooled dynamoelectric machine is provided with an annular baffle disposed in the gap thereof and spaced from stepped core laminations at the end region for improving the cooling of those laminations. The baffle directs a flow of cooling gas across the laminations increasing the velocity of the flow. The baffle is mounted on the stator and comprises an annular member of electrically non-conducting material having a generally triangular cross section with a rounded nose. The baffle may be formed from a plurality of arcuate segments for ease of installation.
Claims13
A reverse flow cooled dynamoelectric machine comprising:
- a gas-tight casing containing cooling gas;
- a stator disposed within said casing and including a core of stacked laminations having axially spaced radially extending cooling passages disposed therein, the end regions of said core comprising radially foreshortened laminations with inboard ends progressively farther removed from the axis thereof providing an array of progressively stepped laminations;
- a rotor disposed within said stator and spaced therefrom by a gas gap;
- fan means disposed in said casing for the reverse flow circulation of the cooling gas;
- and,
- a baffle disposed in said gap and spaced from said stepped laminations for directing a flow of cooling gas flowing axially outwardly from said gas gap to said end regions across said stepped laminations and for increasing the velocity of flow of cooling gas across said stepped laminations and said baffle includes an annular member having outer face spaced from and generally parralell to the inboard edtes of said stepped laminations.
In a reverse flow cooled dynamoelectric machine of the type having a gas-tight casing containing cooling gas, a stator core, the ends of which comprise radially foreshortened laminations with inboard ends progressively farther removed from the axis thereof providing an array of progressively stepped laminations, a rotor disposed within said stator core and spaced therefrom by a gas gap, and fan means for the reverse flow circulation of cooling gas in said casing, the improvement comprising:
- a baffle disposed in said gap and spaced from said stepped laminations for directing a flow of cooling gas flowing axially outwardly from said gas gap to said fan over said stepped laminations and for increasing the velocity of the flow of cooling gas over the stepped laminations and said baffle includes an annular member having an outer face spaced from and generally parallel to the inboard edges of said stepped laminations.
Dependencies are inferred from the claim text.