Cooling arrangement for a dynamoelectric machine

Claim 2

Cooling arrangement for a dynamoelectric machine, comprising casing means; stator means supported in the casing means and having an annular inner portion formed with teeth and with recesses between said teeth, and internally cooled stator winding means located in the outer bottom portions of said recesses partly filling said recesses so that inner open recess portions remain free; rotor means mounted in said casing means for rotation and including internally cooled rotor winding means, said rotor means having an annular outer portion defining an annular air gap with said annular inner portion; and cooling means including a plurality of rigid holding means located in said open recess portions of said stator means, respectively, fixedly secured to the inner portions of the teeth adjacent the respective inner open recess portion, and a plurality of conduit means for a coolant, supported by said holding means, respectively, and being spaced from each other in circumferential direction of said annular air gap for cooling said annular inner portion of said stator means and said annular outer portion of said rotor means bounding said annular air gap.

Claim 3

Cooling arrangement as claimed in claim 1 wherein each said holding means includes an axially extending row of outer holding members secured in the outer part of the respective inner open recess portion, and an axially extending row of inner holding members secured in the inner part of the respective inner open recess portion; and wherein said cooling conduit means for the coolant are pipe means clamped between said outer and inner holding members.

Claim 4

Cooling arrangement as claimed in claim 2 wherein said holding members of at least said row of inner holding members are spaced from each other in axial direction.

Claim 5

Cooling arrangement as claimed in claim 1 and wherein said conduit means include conduits passing through said holding means.

Claim 6

Cooling arrangement as claimed in claim 4 wherein said holding means include axially elongated holding members at least partly located in said inner open recess portions, respectively, secured to the same; and wherein at least one conduit is formed in at least some of said holding members.

Claim 7

Cooling arrangement as claimed in claim 5 wherein said holding means include axially spaced rings connecting said holding members and forming a removable structure with the same.

Claim 8

Cooling arrangement as claimed in claim 1 wherein said inner open recess portions have a radial depth at least equal to the radial extension of said cooling means so that said cooling means do not inwardly project into said gap.

Claim 9

Cooling arrangement as claimed in claim 1 wherein said inner open recess portions have a radial depth less than the radial extension of said cooling means so that said cooling means project into said gap.

Claim 10

Cooling arrangement as claimed in claim 8 wherein said holding means are fixedly secured in said inner open recess portions and having inner portions radially projecting from the same into said gap; and wherein said conduit means include conduits in said inner projecting portions.

Claim 11

Cooling arrangement as claimed in claim 1 wherein said holding means include an axially extending row of outer holding members fitting in the outer part of each inner open recess portion and secured to the same, and an axially extending row of inner holding members secured in the inner part of said inner open recess portion; wherein said outer holding members are formed with inward facing grooves, and said inner holding members are formed with outward facing grooves respectively registering with said inward facing grooves; and wherein said conduit means include cooling pipes, each cooling pipe being located between and fitting into confronting and registering pairs of grooves and being clamped between said outer and inner holding members.

Claim 12

Cooling arrangement as claimed in claim 1 wherein said holding means comprise inner holding plates bent to form outward facing grooves; and cooling pipes fitting into said grooves and supported by said inner holding plates.

Claim 13

Cooling arrangement as claimed in claim 1 wherein said holding means include bar-shaped axially extending holding means at least partly located in said inner open recess portions respectively and having inner portions radially projecting from the same into said gap, and axially spaced circumferentially extending means connecting said holding means and forming a removable structure with the same; and wherein said conduit means include axially extending conduits formed in said bar-shaped holding means.

Claim 14

Cooling arrangement as claimed in claim 12 wherein at least some of said conduits are formed in said radially projecting portions of said holding means.

Claim 15

Cooling arrangement as claimed in claim 12 wherein said axially spaced means include a plurality of axially spaced rings for forming said removable structure.

Claim 16

Cooling arrangement as claimed in claim 12 including circumferentially extending bores penetrating said radially projecting portions of said holding means; and wherein said conduit means include cooling pipes passing through said bores and having portions extending in circumferential direction in said gap.

Claim 17

Cooling arrangement as claimed in claim 12 wherein said stator means includes a stator core having said annular inner portion forming a stator bore in which said structure is located, said stator core having ends spaced from said casing means; and wherein said stator means further include a pair of tubular walls respectively extending between the ends of said structure and said casing means so as to partition the interior of said casing means into a fluidtight outer space, and a fluidtight inner space in which said rotor means and said gap are located.

Claim 18

Cooling arrangement as claimed in claim 12 wherein said holding means, said axially spaced means, and said conduit means are at least partially made of fiberglass reinforced thermosetting resin in which metal particles re embedded.

Claim 19

Cooling arrangement as claimed in claim 12 wherein said axially spaced means include a plurality of segments so that said segments of said structure can be separately inserted into said gap and inner open recess portions.

Claim 20

Cooling arrangement as claimed in claim 1 wherein each holding means includes an outer holding member and an inner holding member; and wherein said conduit means include a plurality of cooling pipes clamped between said outer and inner holding members.

Claim 21

Cooling arrangement As claimed in claim 1 wherein said conduit means include and conduits passing through said holding means; and wherein said holding means consist of an insulating material having a very high electric resistance.

Claim 22

Cooling arrangement as claimed in claim 1, wherein said conduit means include cooling pipe means supported by said holding means.

Claim 23

Cooling arrangement as claimed in claim 1, wherein said conduit means are straight and parallel and extend in axial direction of said rotor means.

Claim 24

Cooling arrangement for a dynamoelectric machine, comprising casing means; stator means supported in the casing means and having an annular inner portion formed with teeth and with recesses between said teeth, and internally cooled stator winding means located in the outer bottom portions of said recesses partly filling said recesses so that inner open recess portions remain free; rotor means mounted in said casing means for rotation and including internally cooled rotor winding means, said rotor means having an annular outer portion defining an annular air gap with said inner portion; and cooling means comprising conduit means for a coolant, and being at least partly located in said inner open recess portions for cooling said annular inner and outer portions bounding said air gap; said conduit means including a plurality of bar-shaped axially extending holding means at least partly located in said inner open recess portions, respectively, and having inner portions radially projecting from the same into said gap, and annular means connecting said holding means and forming a removable structure with the same, said conduit means including axially extending conduits formed in said bar-shaped holding means, and spraying tubes and spraying heads for spraying and vaporizing a coolant in said air gap, and means for evacuating vapors from said air gap.

Claim 25

Cooling arrangement for a dynamoelectric machine, comprising casing means; stator means supported in the casing means and having an annular inner portion formed with teeth and with recesses between said teeth, and internally cooled stator winding means located in the outer bottom portions of said recesses partly filling said recesses so that inner open recess portions remain free; rotor means mounted in said casing means for rotation and including internally cooled rotor winding means, said rotor means having an annular outer portion defining an annular air gap with said inner portion; and cooling means comprising conduit means for a coolant, and being at least partly located in said inner open recess portions for cooling said annular inner and outer portions bounding said air gap; said conduit means including a plurality of bar-shaped axially extending holding means at least partly located in said inner open recess portions, respectively, and having inner portions radially projecting from the same into said gap, and annular means connecting said holding means and forming a removable structure with the same, said conduit means including axially extending conduits formed in said bar-shaped holding means, and spraying tubes and spraying heads for spraying and vaporizing a coolant in said air gap, and means for evacuating vapors from said air gap.

Claim 26

Cooling arrangement for a dynamoelectric machine, comprising casing means; stator means supported in the casing means and having an annular inner portion formed with teeth and with recesses between said teeth, and internally cooled stator winding means located in the outer bottom portions of said recesses partly filling said recesses so that inner open recess portions remain free; rotor means mounted in said casing means for rotation and including internally cooled rotor winding means, said rotor means having an annular outer portion defining an annular air gap with said annular inner portion; and cooling means comprising conduit means for a coolant, and being at least partly located in said inner open recess portions for cooling said annular inner and outer portions bounding said air gap; said conduit means including a plurality of bar-shaped axially extending holding means at least partly located in said inner open recess portions, respectively, and having inner portions radially projecting from the same into said gap, and annular means connecting said holding means and forming a removable structure with the same, said conduit means including axially extending conduits formed in said bar-shaped holding means, and spraying tubes and spraying heads for spraying and vaporizing a coolant in said air gap, wherein the sprayed coolant is condensed on the cold surface of said cooling conduit means.

Claim 27

Cooling arrangement for a dynamoelectric machine, comprising casing means; stator means supported in the casing means and having an annular inner portion formed with teeth and with recesses between said teeth, and internally cooled stator winding means located in the outer bottom portions of said recesses partly filling said recesses so that inner open recess portions remain free; rotor means mounted in said casing means for rotation and including internally cooled rotor winding means, said rotor means having an annular outer portion defining an annular air gap with said annular inner portion; and cooling means comprising conduit means for a coolant, and being at least partly located in said inner open recess portions for cooling said annular inner and outer portions bounding said air gap; said conduit means including a plurality of bar-shaped axially extending holding means at least partly located in said inner open recess portions, respectively, and having inner portions radially projecting from the same into said gap, and annular means connecting said holding means and forming a removable structure with the same, said conduit means including axially extending conduits formed in said bar-shaped holding means, and spraying tubes and spraying heads for spraying and vaporizing a coolant in said air gap, wherein the sprayed coolant is condensed on the cold surface of said cooling conduit means.

Claim 28

Cooling arrangement for a dynamoelectric machine, comprising casing means; stator means supported in said casing means and including an annular inner portion having teeth forming an inner annular stator surface and being separated by recesses, and internally cooled stator winding means located in the outer bottom portions of said recesses; rotor means mounted in said casing means for rotation and including internally cooled rotor winding means, said rotor means having an annular outer rotor surface defining an annular air gap with said inner annular stator surface; and cooling means including a tubular holding structure secured to said inner annular stator surface, and conduit means including spraying means for a coolant supported by said tubular structure in the free portion of said air gap between said tubular holding structure and said annular outer rotor surface for spraying the coolant onto said annular outer rotor surface.

Claim 29

Cooling arrangement for a dynamoelectric machine, comprising casing means; stator means supported in said casing means and including an annular inner portion having teeth forming an inner annular stator surface and being separated by recesses, and internally cooled stator winding means located in the outer bottom portions of said recesses; rotor means mounted in said casing means for rotation and including internally cooled rotor winding means, said rotor means having an annular outer rotor surface defining an annular air gap with said inner annular stator surface; and cooling means including a tubular holding structure secured to said inner annular stator surface, and conduit means including spraying means for a coolant supported by said tubular structure in the free portion of said air gap between said tubular holding structure and said annular outer rotor surface for spraying the coolant onto said annular outer rotor surface.

Claim 30

Cooling arrangement for a dynamoelectric machine, comprising casing means; stator means supported in said casing means and including an annular inner portion having teeth separated by recesses and having inner end faces forming an annular inner stator surface, internally cooled stator winding means located in the outer bottom portions of said recesses partly filling said recesses so that inner open recess portions remain free, and a pair of tubular walls respectively extending between the ends of said annular inner portion and said casing means, the annular inner surfaces of said tubular walls being flush with said annular inner stator surface; rotor means mounted in said casing means for rotation and including internally cooled rotor winding means, said rotor means having an annular outer rotor surface defining an air gap with said annular inner stator surface; and cooling means including a plurality of rigid holding means located in said inner open recess portions, respectively, fixedly secured to the inner portions of the teeth adjacent the respective inner open recess portion, and a plurality of conduit means for a coolant, supported by said holding means and located in said inner open recess portions, respectively, the inner surfaces of said holding means being flush with said inner end faces of said teeth and with said inner annular stator surface for reducing windage losses.

Claim 31

Cooling arrangement for a dynamoelectric machine, comprising casing means; stator means supported in said casing means and including an annular inner portion having teeth separated by recesses and having inner end faces forming an annular inner stator surface, internally cooled stator winding means located in the outer bottom portions of said recesses partly filling said recesses so that inner open recess portions remain free, and a pair of tubular walls respectively extending between the ends of said annular inner portion and said casing means, the annular inner surfaces of said tubular walls being flush with said annular inner stator surface; rotor means mounted in said casing means for rotation and including internally cooled rotor winding means, said rotor means having an annular outer rotor surface defining an air gap with said annular inner stator surface; and cooling means including a plurality of rigid holding means located in said inner open recess portions, respectively, fixedly secured to the inner portions of the teeth adjacent the respective inner open recess portion, and a plurality of conduit means for a coolant, supported by said holding means and located in said inner open recess portions, respectively, the inner surfaces of said holding means being flush with said inner end faces of said teeth and with said inner annular stator surface for reducing windage losses.

Claim 32

Cooling arrangement as claimed in claim 26, wherein said holding means include axially extending holding bars located in said recesses and having projecting portions axially projecting from the ends of said rotor means; and wherein said tubular walls include said projecting portions of said holding bars, and axially extending connecting bars between said projecting portions of said holding bars abutting the same and forming with the same said tubular walls.

Claim 33

Cooling arrangement for a dynamoelectric machine, comprising casing means; stator means supported in the casing means and having an annular inner portion formed with teeth and with recesses between said teeth, and internally cooled stator winding means located in the outer bottom portions of said recesses partly filling said recesses so that inner open recess portions remain free; rotor means mounted in said casing means for rotation and including internally cooled rotor winding means, said rotor means having an annular outer portion defining an annular air gap with said annular inner portion; and cooling means including a plurality of holding means fixedly secured in said open recess portions of said stator means, respectively, and a plurality of conduit means for a coolant, supported by said holding means, respectively, and being spaced from each other in circumferential direction of said annular air gap for cooling said annular inner portion of said stator means and said annular air gap, said inner open recess portions having a radial depth less than the radial extension of said cooling means so that said cooling means project into said gap, said holding means being fixedly secured in said inner open recess portions and having inner portions radially projecting from said open recess portions into said gap; and said conduit means including cooling pipe means forming conduits in said inner projecting portions.

Claim 34

Cooling arrangement for a dynamoelectric machine, comprising casing means; stator means supported in the casing means and having an annular inner portion formed with teeth and with recesses between said teeth, and internally cooled stator winding means located in the outer bottom portions of said recesses partly filling said recesses so that inner open recess portions remain free; rotor means mounted in said casing means for rotation and including internally cooled rotor winding means, said rotor means having an annular outer portion defining an annular air gap with said annular inner portion; and cooling means including a plurality of holding means fixedly secured in said open recess portions of said stator means, respectively, and a plurality of conduit means for a coolant, supported by said holding means, respectively, and being spaced from each other in circumferential direction of said annular air gap for cooling said annular inner portion of said stator means and said annular air gap, said inner open recess portions having a radial depth less than the radial extension of said cooling means so that said cooling means project into said gap, said holding means being fixedly secured in said inner open recess portions and having inner portions radially projecting from said open recess portions into said gap; and said conduit means including cooling pipe means forming conduits in said inner projecting portions.

Claim 35

Cooling arrangement for a dynamoelectric machine, comprising casing means; stator means supported in the casing means and having an annular inner portion formed with teeth and with recesses between said teeth, and internally cooled stator winding means located in the outer bottom portions of said recesses partly filling said recesses so that inner open recess portions remain free; rotor means mounted in said casing means for rotation and including internally cooled rotor winding means, said rotor means haviNg an annular outer portion defining an annular air gap with said annular inner portion; and cooling means including a plurality of holding means fixedly secured in said open recess portions of said stator means, respectively, and a plurality of conduit means for a coolant, supported by said holding means, respectively, and being spaced from each other in circumferential direction of said annular air gap for cooling said annular inner portion of said stator means and said annular outer portion of said rotor means bounding said annular air gap, said conduit means including pipe means held by said holding means and having spray head means for spraying a vaporizing coolant into said gap.

Claim 36

Cooling arrangement for a dynamoelectric machine, comprising casing means; stator means supported in the casing means and having an annular inner portion formed with teeth and with recesses between said teeth, and internally cooled stator winding means located in the outer bottom portions of said recesses partly filling said recesses so that inner open recess portions remain free; rotor means mounted in said casing means for rotation and including internally cooled rotor winding means, said rotor means haviNg an annular outer portion defining an annular air gap with said annular inner portion; and cooling means including a plurality of holding means fixedly secured in said open recess portions of said stator means, respectively, and a plurality of conduit means for a coolant, supported by said holding means, respectively, and being spaced from each other in circumferential direction of said annular air gap for cooling said annular inner portion of said stator means and said annular outer portion of said rotor means bounding said annular air gap, said conduit means including pipe means held by said holding means and having spray head means for spraying a vaporizing coolant into said gap.

Claim 37

Cooling arrangement for a dynamoelectric machine, comprising casing means; stator means supported in the casing means and having an annular inner portion formed with teeth and with recesses between said teeth, and internally cooled stator winding means located in the outer bottom portions of said recesses partly filling said recesses so that inner open recess portions remain free; rotor means mounted in said casing means for rotation and including internally cooled rotor winding means, said rotor means having an annular outer portion defining an annular air gap with said annular inner portion; and cooling means including a plurality of holding means fixedly secured in said open recess portions of said stator means, respectively, and a plurality of conduit means for a coolant, supported by said holding means, respectively, and being spaced from each other in circumferential direction of said annular air gap for cooling said annular inner portion of said stator means and said annular outer portion of said rotor means bounding said annular air gap, said conduit means comprising heat pipe means supported by said holding means and extending in axial direction between and beyond the axial ends of said gap for exerting a capillary action on a coolant so that the coolant moves in said heat pipe means toward one of said ends; and condenser means located in said casing means at the end of said heat pipe means to which heat is conveyed, said condenser means being located at one of said ends of said gap.

Claim 38

Cooling arrangement for a dynamoelectric machine, comprising casing means; stator means supported in the casing means and having an annular inner portion formed with teeth and with recesses between said teeth, and internally cooled stator winding means located in the outer bottom portions of said recesses partly filling said recesses so that inner open recess portions remain free; rotor means mounted in said casing means for rotation and including internally cooled rotor winding means, said rotor means having an annular outer portion defining an annular air gap with said annular inner portion; and cooling means including a plurality of holding means fixedly secured in said open recess portions of said stator means, respectively, and a plurality of conduit means for a coolant, supported by said holding means, respectively, and being spaced from each other in circumferential direction of said annular air gap for cooling said annular inner portion of said stator means and said annular outer portion of said rotor means bounding said annular air gap, said conduit means comprising heat pipe means supported by said holding means and extending in axial direction between and beyond the axial ends of said gap for exerting a capillary action on a coolant so that the coolant moves in said heat pipe means toward one of said ends; and condenser means located in said casing means at the end of said heat pipe means to which heat is conveyed, said condenser means being located at one of said ends of said gap.

Claim 39

Cooling arrangement for a dynamoelectric machine, comprising casing means; stator means supported in the casing means and having an annular inner portion formed with teeth and with recesses between said teeth, and internally cooled stator winding means located in the outer bottom portions of said recesses partly filling said recesses so that inner open recess portions remain free; rotor means mounted in said casing means for rotation and including internally cooled rotor winding means, said rotor means having an annular outer portion defining an annular air gap with said annular inner portion; and cooling means including a plurality of holding means fixedly secured in said open recess portions of said stator means, respectively, and a plurality of conduit means for a coolant, supported by said holding means, respectively, and being spaced from each other in circumferential direction of said annular air gap for cooling said annular inner portion of said stator means and said annular outer portion of said rotor means bounding said annular air gap, said holding means including bar-shaped axially extending holding means at least partly located in said inner open recess portions, respectively, and having inner portions radially projecting from the same into said gap, and axially spaced circumferentially extending means connecting said holding means and forming a removable structure with the same, said conduit means including axially extending conduits formed in said bar-shaped holding means, said conduit means comprising heat pipe means supported by said holding means and extending in axial direction between and beyond the axial ends of said annular gap; and comprising a condenser means for removing of heat losses from said air gap.

Claim 40

Cooling arrangement for a dynamoelectric machine, comprising casing means; stator means supported in the casing means and having an annular inner portion formed with teeth and with recesses between said teeth, and internally cooled stator winding means located in the outer bottom portions of said recesses partly filling said recesses so that inner open recess portions remain free; rotor means mounted in said casing means for rotation and including internally cooled rotor winding means, said rotor means having an annular outer portion defining an annular air gap with said annular inner portion; and cooling means including a plurality of holding means fixedly secured in said open recess portions of said stator means, respectively, and a plurality of conduit means for a coolant, supported by said holding means, respectively, and being spaced from each other in circumferential direction of said annular air gap for cooling said annular inner portion of said stator means and said annular outer portion of said rotor means bounding said annular air gap, said holding means including bar-shaped axially extending holding means at least partly located in said inner open recess portions, respectively, and having inner portions radially projecting from the same into said gap, and axially spaced circumferentially extending means connecting said holding means and forming a removable structure with the same, said conduit means including axially extending conduits formed in said bar-shaped holding means, said conduit means comprising heat pipe means supported by said holding means and extending in axial direction between and beyond the axial ends of said annular gap; and comprising a condenser means for removing of heat losses from said air gap.