Liquid cooled rotor for dynamoelectric machines

Claim 2

A rotor member for a dynamoelectric machine, said rotor member having shaft portions and having a body portion carrying windings, said windings having passages for circulation of a liquid coolant therethrough, at least said shaft portions having central bores extending axially therethrough, electrical leads for the windings disposed in the bore of the shaft portion at one end of the rotor member, said leads being solid and extending axially in said bore, an annular passage in said bore closely surrounding said leads for their entire length, means for introducing liquid coolant into said shaft bore beyond the end of the leads, means for directing coolant from the bore into said annular passage to flow therethrough in cooling relation with the leads, means for directing coolant from said annular passage to said winding passages, and means for directing coolant from the winding passages directly to a shaft bore for discharge therefrom.

Claim 3

A rotor member as defined in claim 1 in which the means for directing coolant from the shaft bore to the annular passage comprises a member having a central passage communicating with the bore and a plurality of passages inclined to the shaft axis and extending Both radially and axially from the central passage, said inclined passages communicating with the annular passage.

Claim 4

A rotor member as defined in claim 1 in which the shaft portion at said one end of the rotor member includes a portion integral with the body portion and a separate portion coaxial therewith, said electrical leads and annular passage extending substantially to the end of the integral shaft portion, means for rigidly coupling together the integral and separate shaft portions, means for introducing liquid coolant into the bore of the separate shaft portion, and a coupling member disposed within said coupling means, said coupling member having a central passage communicating with the bore of the separate shaft portion and a plurality of passages inclined to the shaft axis and extending both axially and radially from said central passage, said inclined passages communicating with said annular passage.

Claim 5

A rotor member as defined in claim 3 in which the bore of the separate shaft portion contains a tube connected to said coupling member and the annular passage is defined by two concentric tubes connected to the coupling member, said tubes and said coupling member made of a corrosion-resistant material.

Claim 6

A rotor member as defined in claim 1 having radial leads adjacent each end of said axial leads, each of said radial leads extending radially of the shaft portion from the outer surface thereof into an axial lead to make electrical connection thereto, the radial leads adjacent the body portion of the rotor extending through said annular passage, baffle means in he annular passage to effect circulation of coolant around the radial leads, and means for making electrical connection between said radial leads and said winding.

Claim 7

A rotor winding as defined in claim 1 having radial leads adjacent each end of said axial leads, each of said radial leads extending radially of the shaft portion from the outer surface thereof into an axial lead to make electrical connection thereto, the radial leads adjacent the body portion of the rotor extending through said annular passage, radial tubes extending from the annular passage through the shaft portion for carrying coolant to the surface of the shaft portion, means for directing said coolant to said winding passages, means in the annular passage for effecting flow of coolant around the last-mentioned radial leads before entering the radial tubes, and means for making electrical connections between the last-mentioned leads and the windings.

Claim 8

A rotor member as defined in claim 6 in which the means for making electrical connections between the radial leads and the windings comprise hollow conductors, and means for directing a part of the liquid coolant to flow through said conductors.

Claim 9

A rotor member for a dynamoelectric machine, said rotor member having shaft portions and having a body portion carrying windings, said windings having passages for circulation of a liquid coolant therethrough, at least said shaft portions having central bores extending axially therethrough, electrical leads for said windings extending axially in the bore of the shaft portion at one end of the rotor, a pair of tubes disposed concentrically in the bore at said one end of the rotor, said tubes closely surrounding said leads and defining an annular passage between them for flow of liquid in cooling relation with the leads, another tube disposed centrally in the shaft bore beyond the leads, means connecting the last-mentioned tube to said concentric tubes, means for introducing a liquid coolant into the centrally disposed tube, and means for directing liquid from said annular passage to the passage in the windings, all of said tubes and said connecting means being made of a corrosion-resistant material.

Claim 10

A rotor member for a dynamoelectric machine, said rotor member having shaft portions and having a body portion carrying windings, said windings having passages for circulation of a liquid coolant therethrough, at least said shaft portions having central bores extending axially therethrough, electrical leads for said windings extending axially in the bore of the shaft portion at one end of the rotor, a pair of tubes disposed concentrically in the bore at said one end of the rotor, said tubes closely surrounding said leads and defining an annular passage between them for flow of liquid in cooling relation with the leads, another tube disposed centrally in the shaft bore beyond the leads, means connecting the last-mentioned tube to said concentric tubes, means for introducing a liquid coolant into the centrally disposed tube, and means for directing liquid from said annular passage to the passage in the windings, all of said tubes and said connecting means being made of a corrosion-resistant material.

Claim 11

A rotor member as defined in claim 8 in which the tubes and connecting means are made of stainless steel.

Claim 12

A rotor member as defined in claim 8 in which the concentric tubes are secured in axial position adjacent the bodY portion of the rotor and the concentric tubes, centrally disposed tube and connecting means are otherwise free to move axially in the shaft bore.

Claim 13

A rotor member for a dynamoelectric machine, said rotor member having a body portion carrying windings and having shaft portions at each end of the body portion, at least the shaft portion at one end of the rotor having a central bore extending axially therethrough, electrical leads for said windings disposed in said shaft bore and extending axially therethrough substantially to the end of the shaft portion, a pair of concentric tubes disposed in the shaft bore around said leads, said tubes being substantially coextensive with the leads and forming an annular passage between them closely surrounding the leads, a separate shaft portion coaxial with the first-mentioned shaft portion and having a central bore, means for rigidly coupling said shaft portions together, a tube centrally disposed in the bore of the separate shaft portion, a coupling member within said coupling means, said coupling member having a central passage connected to said centrally disposed tube and having a plurality of passages extending outwardly from the central passage at an acute angle to the shaft axis and communicating with said annular passage, means for introducing liquid coolant into said centrally disposed tube to flow therethrough and through the annular passage in cooling relation with the leads, and means for directing the coolant from the annular passage to said winding passages.

Claim 14

A rotor member for a dynamoelectric machine, said rotor member having a body portion carrying windings and having shaft portions at each end of the body portion, at least the shaft portion at one end of the rotor having a central bore extending axially therethrough, electrical leads for said windings disposed in said shaft bore and extending axially therethrough substantially to the end of the shaft portion, a pair of concentric tubes disposed in the shaft bore around said leads, said tubes being substantially coextensive with the leads and forming an annular passage between them closely surrounding the leads, a separate shaft portion coaxial with the first-mentioned shaft portion and having a central bore, means for rigidly coupling said shaft portions together, a tube centrally disposed in the bore of the separate shaft portion, a coupling member within said coupling means, said coupling member having a central passage connected to said centrally disposed tube and having a plurality of passages extending outwardly from the central passage at an acute angle to the shaft axis and communicating with said annular passage, means for introducing liquid coolant into said centrally disposed tube to flow therethrough and through the annular passage in cooling relation with the leads, and means for directing the coolant from the annular passage to said winding passages.

Claim 15

A rotor member as defined in claim 11 in which the tubes and coupling member are made of a corrosion-resistant material.

Claim 16

A rotor member as defined in claim 11 in which the concentric tubes are secured in position at a location adjacent the body portion of the rotor and the concentric tubes, the centrally disposed tubes and the coupling member are free to move together axially of the shaft bores.

Claim 17

A rotor member as defined in claim 11 in which the means for directing coolant from the annular passage comprises tubes extending radially from the annular passage to the surface of the rotor member, a circular chamber extending around the rotor member and communicating with said radial tubes, means for connecting the circular chamber to said winding passages, and means for securing the concentric tubes in axial position adjacent the rotor body, the tubes and the coupling member being otherwise free to move together axially of the shaft bores.

Claim 18

A rotor member as defined in claim 14 in which all the tubes and the coupling member are made of a corrosion-resistant material.