Ventilated gusset for single-layer turns in a dynamoelectric machine

Claim 2

Apparatus for cooling a portion of a dynamoelectric machine, said dynamoelectric machine being of a type having at least one conductor bar and at least one end turn contiguous to said at least one conductor bar, comprising: a joint at a junction of said at least one conductor bar and said at least one end turn; a first groove in a first surface of said conductor bar; first means for retaining a coolant in said first groove; a second groove in a second surface of said end turn; second means for retaining said coolant in said second groove; said first and second grooves communicating said coolant at said joint; a gusset; said gusset overlapping a first portion of said conductor bar adjacent to said joint; said gusset further overlapping a second portion of said end turn adjacent to said joint, whereby said joint is strengthened; said gusset including a surface facing said first and second grooves; said surface including a third groove; and said third groove being substantially congruent to facing portions of said first and second grooves, whereby a flow channel for said coolant is formed passing through said joint, whereby a single flow of coolant is effective for coolant both said end turn and said conductor bar.

Claim 3

Apparatus according to claim 1, wherein: said at least one conductor bar includes a first rabbet adjacent said joint; said at least one end turn includes at a second rabbet adjacent said joint; said gusset being fitted within said first and second rabbets with a second surface thereof substantially coplanar with surfaces of said at least one conductor bar and said at least one end turn.

Claim 4

Apparatus for cooling a portion of a dynamoelectric machine, said dynamoelectric machine being of a type having at least one conductor bar and at least one end turn contiguous to said at least one conductor bar, comprising: a joint at a junction of said at least one conductor bar and said at least one end turn; a first groove in a first surface of said conductor bar; first means for retaining a coolant in said first groove; a second groove in a second surface of said end turn, second means for retaining said coolant in said second groove; said first and second grooves communicating said coolant at said joint; a gusset; said gusset overlapping a first portion of said conductor bar adjacent to said joint; said gusset further overlapping a second portion of said end turn adjacent to said joint, whereby said joint is strengthened; said gusset including a surface facing said first and second grooves; said surface including a third groove; said third groove being substantially congruent to facing portions of said first and second grooves, whereby a flow channel for said coolant is formed passing through said joint, whereby a single flow of coolant is effective for cooling both said end turn and said conductor bar; said first groove includes a first depressed portion; said first depressed portion extending from said joint along said at least one conductor bar beyond said gusset, whereby said flow channel in a portion thereof defined by said gusset and said conductor bar includes a height equal to a sum of depths of said first groove, said third groove and said first depressed portion; said second groove includes a second depressed portion, deeper than said second groove; and said second depressed portion extending from said joint along said at least one end turn beyond said gusset, whereby said flow channel in a portion thereof defined by said gusset and said end turn includes a height equal to a sum of depths of said second groove, said third groove and said second depressed portion.

Claim 5

Apparatus for cooling a portion of a dynamoelectric machine, said dynamoelectric machine being of a type having at least one conductor bar and at least one end turn contiguous to said at least one conductor bar, comprising: a joint at a junction of said at least one conductor bar and said at least one end turn; a first groove in a first surface of said conductor bar; first means for retaining a coolant in said first groove; a second groove in a second surface of said end turn, second means for retaining said coolant in said second groove; said first and second grooves communicating said coolant at said joint; a gusset; said gusset overlapping a first portion of said conductor bar adjacent to said joint; said gusset further overlapping a second portion of said end turn adjacent to said joint, whereby said joint is strengthened; said gusset including a surface facing said first and second grooves; said surface including a third groove; said third groove being substantially congruent to facing portions of said first and second grooves, whereby a flow channel for said coolant is formed passing through said joint, whereby a single flow of coolant is effective for cooling both said end turn and said conductor bar; said first groove includes a first depressed portion; said first depressed portion extending from said joint along said at least one conductor bar beyond said gusset, whereby said flow channel in a portion thereof defined by said gusset and said conductor bar includes a height equal to a sum of depths of said first groove, said third groove and said first depressed portion; said second groove includes a second depressed portion, deeper than said second groove; and said second depressed portion extending from said joint along said at least one end turn beyond said gusset, whereby said flow channel in a portion thereof defined by said gusset and said end turn includes a height equal to a sum of depths of said second groove, said third groove and said second depressed portion.

Claim 6

Apparatus according to claim 3, wherein: said gusset includes first and second bevelled portions at extremities thereof facing said first end second depressed portions, respectively; and said first and second bevelled portions being effective for reducing a flow resistance of coolant passing through said flow channel.

Claim 7

Apparatus for cooling a portion of a dynamoelectric machine, said dynamoelectric machine being of a type having at least one conductor bar and at least one end turn contiguous to said at least one conductor bar, comprising: a joint at a junction of said at least one conductor bar and said at least one end turn; a first groove in a first surface of said conductor bar; first means for retaining a coolant in said first groove; a second groove in a second surface of said end turn; second means for retaining said coolant in said second groove; said first and second grooves communicating said coolant at said joint; a gusset; said gusset overlapping a first portion of said conductor bar adjacent to said joint; said gusset further overlapping a second portion of said end turn adjacent to said joint, whereby said joint is strengthened; said gusset including a surface facing said first and second grooves; said surface including a third groove; said third groove being substantially congruent to facing portions of said first and second grooves, whereby a flow channel for said coolant is formed passing through said joint, whereby a single flow of coolant is effective for cooling both said end turn and said conductor bar; said gusset includes first and second bevelled portions at extremities thereof facing said first and second grooves, respectively; and said first and second bevelled portions being effective for reducing a flow resistance of coolant entering and exiting said flow channel.

Claim 8

Apparatus for cooling a portion of a dynamoelectric machine, said dynamoelectric machine being of a type having at least one conductor bar and at least one end turn contiguous to said at least one conductor bar, comprising: a joint at a junction of said at least one conductor bar and said at least one end turn; a first groove in a first surface of said conductor bar; first means for retaining a coolant in said first groove; a second groove in a second surface of said end turn; second means for retaining said coolant in said second groove; said first and second grooves communicating said coolant at said joint; a gusset; said gusset overlapping a first portion of said conductor bar adjacent to said joint; said gusset further overlapping a second portion of said end turn adjacent to said joint, whereby said joint is strengthened; said gusset including a surface facing said first and second grooves; said surface including a third groove; said third groove being substantially congruent to facing portions of said first and second grooves, whereby a flow channel for said coolant is formed passing through said joint, whereby a single flow of coolant is effective for cooling both said end turn and said conductor bar; said gusset includes first and second bevelled portions at extremities thereof facing said first and second grooves, respectively; and said first and second bevelled portions being effective for reducing a flow resistance of coolant entering and exiting said flow channel.

Claim 9

Apparatus for cooling a portion of a dynamoelectric machine, said dynamoelectric machine being of a type having at least one conductor bar and at least one end turn contiguous to said at least one conductor bar, comprising: a joint at a junction of said at least one conductor bar and said at least one end turn; a first groove in a first surface of said conductor bar; first means for retaining a coolant in said first groove; a second groove in a second surface of said end turn; second means for retaining said coolant in said second groove; said first and second grooves communicating said coolant at said joint; a gusset; said gusset overlapping a first portion of said conductor bar adjacent to said joint; said gusset further overlapping a second portion of said end turn adjacent to said joint, whereby said joint is strengthened; said gusset including a surface facing said first and second grooves; said surface including a third groove; said third groove being substantially congruent to facing portions of said first and second grooves, whereby a flow channel for said coolant is formed passing through said joint, whereby a single flow of coolant is effective for cooling both said end turn and said conductor bar; axes of said at least one conductor bar and said at least one end turn meet at an first angle; said first groove including a first angled portion adjacent said joint; said second groove including a second angled portion adjacent said joint; said first and second angled portions meeting each other at said joint; said first and second angled portions together defining a diagonal portion which is diagonal to said axes.

Claim 10

Apparatus for cooling a portion of a dynamoelectric machine, said dynamoelectric machine being of a type having at least one conductor bar and at least one end turn contiguous to said at least one conductor bar, comprising: a joint at a junction of said at least one conductor bar and said at least one end turn; a first groove in a first surface of said conductor bar; first means for retaining a coolant in said first groove; a second groove in a second surface of said end turn; second means for retaining said coolant in said second groove; said first and second grooves communicating said coolant at said joint; a gusset; said gusset overlapping a first portion of said conductor bar adjacent to said joint; said gusset further overlapping a second portion of said end turn adjacent to said joint, whereby said joint is strengthened; said gusset including a surface facing said first and second grooves; said surface including a third groove; said third groove being substantially congruent to facing portions of said first and second grooves, whereby a flow channel for said coolant is formed passing through said joint, whereby a single flow of coolant is effective for cooling both said end turn and said conductor bar; axes of said at least one conductor bar and said at least one end turn meet at an first angle; said first groove including a first angled portion adjacent said joint; said second groove including a second angled portion adjacent said joint; said first and second angled portions meeting each other at said joint; said first and second angled portions together defining a diagonal portion which is diagonal to said axes.

Claim 11

Apparatus for cooling a portion of a dynamoelectric machine, said dynamoelectric machine being of a type having at least one conductor bar and at least one end turn contiguous to said at least one conductor bar, comprising: a joint at a junction of said at least one conductor bar and said at least one end turn; a first groove in a first surface of said conductor bar; first means for retaining a coolant in said first groove; a second groove in a second surface of said end turn; second means for retaining said coolant in said second groove; said first and second grooves communicating said coolant at said joint; a first rabbet in said conductor bar adjacent said joint; a second rabbet in said end turn adjacent said joint; a gusset fitted into said first and second rabbets, with its outer surface substantially coplanar with outer surfaces of said conductor bar and said end turn; said gusset overlapping a first portion of said conductor bar adjacent to said joint; said gusset further overlapping a second portion of said end turn adjacent to said joint, whereby said joint is strengthened; said gusset including a surface facing said first and second grooves; said surface including a third groove; and said first groove includes a first depressed portion; said first depressed portion extending from said joint along said at least one conductor bar beyond said gusset; said second groove includes a second depressed portion; said second depressed portion extending from said joint along said at least one end turn beyond said gusset; said third groove being substantially congruent to facing portions of said first and second depressed portions; depths of said first and second depressed portions being such that a depth of a flow channel beneath said gusset is no less than a depth of said first and second grooves outside said first and second depressed portions.

Claim 12

Apparatus for cooling a portion of a dynamoelectric machine, said dynamoelectric machine being of a type having at least one conductor bar and at least one end turn contiguous to said at least one conductor bar, comprising: a joint at a junction of said at least one conductor bar and said at least one end turn; a first groove in a first surface of said conductor bar; first means for retaining a coolant in said first groove; a second groove in a second surface of said end turn; second means for retaining said coolant in said second groove; said first and second grooves communicating said coolant at said joint; a first rabbet in said conductor bar adjacent said joint; a second rabbet in said end turn adjacent said joint; a gusset fitted into said first and second rabbets, with its outer surface substantially coplanar with outer surfaces of said conductor bar and said end turn; said gusset overlapping a first portion of said conductor bar adjacent to said joint; said gusset further overlapping a second portion of said end turn adjacent to said joint, whereby said joint is strengthened; said gusset including a surface facing said first and second grooves; said surface including a third groove; and said first groove includes a first depressed portion; said first depressed portion extending from said joint along said at least one conductor bar beyond said gusset; said second groove includes a second depressed portion; said second depressed portion extending from said joint along said at least one end turn beyond said gusset; said third groove being substantially congruent to facing portions of said first and second depressed portions; depths of said first and second depressed portions being such that a depth of a flow channel beneath said gusset is no less than a depth of said first and second grooves outside said first and second depressed portions.

Claim 13

Apparatus according to claim 7, wherein: said gusset includes first and second bevelled portions at extremities thereof facing said first and second depressed portions, respectively; and said first and second bevelled portions being effective for reducing a flow resistance of coolant passing through said flow channel.

Claim 14

Apparatus according to claim 7 wherein: axes of said at least one conductor bar and said at least one end turn meet at a first angle; said first groove including a first angled portion adjacent said joint; said second groove including a second angled portion adjacent said joint; said first and second angled portions meeting each other at said joint; said first and second angled portion together defining a diagonal portion which is diagonal to said axes, whereby said flow channel reduces the speed at which said coolant is required to turn in passing through said flow channel.