Tieless bracing for supporting end turns of a dynamoelectric machine
First Claim
1. Tieless bracing means for winding end turns of a dynamoelectric machine comprising a radially expandable and contractable split metal annulus, spreader means mounted on said annulus, said spreader means being operable to hold the ends of said annulus in a predetermined spaced relationship with one another, a ring of compressible material positioned in engagement with the inner side of said annulus around substantially the entire circumference thereof, in combination with a dynamoelectric machine frame having a stator mounted therein with insulated stator winding end turns extending beyond the ends of the stator core laminations, and a plurality of adjustable annulus-positioning means mounted on said frame at angularly spaced points radially outward from the end turns, each of said positioning means comprising:
- a. a generally T-shaped bracket mounted on the frame with the trunk of the bracket generally parallel to the closest stator winding end turns and spaced therefrom, said trunk of the bracket including first wall means defining a cup-shaped recess in the side of the bracket closest to the stator winding ends, and second wall means defining a threaded aperture extending through the bracket from the bottom of said recess to the radially outermost side of the bracket, and a threaded bolt rotatably threaded into said threaded aperture with the head of the bolt projecting from the outer surface of the bracket,b. a dowel having a transverse groove across its inner face slidably mounted within the cup-shaped recess, said transverse groove being positioned to partially encompass an outer surface portion of said metal annulus to hold it against said ring of compressible material, andc. fastening means mounted on each threaded bolt to secure it in a desired operating position after the respective bolts have been rotated to force their inner ends against the dowels associated therewith to locate the annulus in a desired predetermined position with respect to the stator winding end turns.
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Abstract
A tieless bracing arrangement is provided for rigidly supporting the winding end turns of a dynamoelectric machine in relatively rigid operating position. The bracing arrangement is characterized by including an expandable annulus having a spreader that is operable in conjunction with a plurality of slidably mounted dowels to selectively hold the annulus open while it is positioned adjacent to the machine end turns and then to compress the annulus tightly against the end turns to secure them in operating position.
24 Citations
13 Claims
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1. Tieless bracing means for winding end turns of a dynamoelectric machine comprising a radially expandable and contractable split metal annulus, spreader means mounted on said annulus, said spreader means being operable to hold the ends of said annulus in a predetermined spaced relationship with one another, a ring of compressible material positioned in engagement with the inner side of said annulus around substantially the entire circumference thereof, in combination with a dynamoelectric machine frame having a stator mounted therein with insulated stator winding end turns extending beyond the ends of the stator core laminations, and a plurality of adjustable annulus-positioning means mounted on said frame at angularly spaced points radially outward from the end turns, each of said positioning means comprising:
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a. a generally T-shaped bracket mounted on the frame with the trunk of the bracket generally parallel to the closest stator winding end turns and spaced therefrom, said trunk of the bracket including first wall means defining a cup-shaped recess in the side of the bracket closest to the stator winding ends, and second wall means defining a threaded aperture extending through the bracket from the bottom of said recess to the radially outermost side of the bracket, and a threaded bolt rotatably threaded into said threaded aperture with the head of the bolt projecting from the outer surface of the bracket, b. a dowel having a transverse groove across its inner face slidably mounted within the cup-shaped recess, said transverse groove being positioned to partially encompass an outer surface portion of said metal annulus to hold it against said ring of compressible material, and c. fastening means mounted on each threaded bolt to secure it in a desired operating position after the respective bolts have been rotated to force their inner ends against the dowels associated therewith to locate the annulus in a desired predetermined position with respect to the stator winding end turns. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification