End turn support and cooling fixture

• US 9,812,917 B2
• Filed: 10/07/2014
• Issued: 11/07/2017
• Est. Priority Date: 10/07/2014
• Status: Active Grant

• Current Assignee: Hamilton Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Hamilton Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Himmelmann, Richard A.
• Primary Examiner(s): Leung, Quyen
• Assistant Examiner(s): Johnson, Eric
• Application Number:
  US14/508,762
• Publication Number:
  US 20160099624A1
• Time in Patent Office: 1,127 Days
• Field of Search: 310 54, 310 61
• CPC Class Codes: H02K 16/00 Machines with more than one rotor or stator machines for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts H02K51/00; permanent magnet machines with multiple rotors or stators relatively rotated for vectorially combining the excitation fields or the armature voltages H02K21/029
• CPC Class Codes: H02K 3/24 with channels or ducts for cooling medium between the conductors
• CPC Class Codes: H02K 3/46 Fastening of windings on the stator or rotor structure
• CPC Class Codes: H02K 3/51 applicable to rotors only
• CPC Class Codes: H02K 9/19 for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Abstract

A generator rotor system having various features is disclosed. The generator rotor system has at least one main stage generator rotor with winding-pole sets spaced annularly about the rotor. The tendency of the windings to distort and or displace under the centrifugal force of the spinning rotor is ameliorated by a winding retention member disposed axially outboard of the winding-pole sets. The winding retention member may also have a one or more cooling oil routing hole to enhance the flow of cooling oil among the windings.

Claims

1. A main stage generator rotor comprising:

a winding-pole set comprising a winding and a pole; and

a winding retention member;

wherein the main stage generator rotor has an axis of rotation,

wherein the axis of rotation has a radius,

wherein the winding retention member is disposed outboard of the winding-pole set along the axis of rotation,

whereby the winding of the winding-pole set is axially confined between the winding retention member and the pole of the winding-pole set, and

whereby the winding of the winding-pole set is constrained by the winding retention member from radially translating,

the winding retention member comprising;

an axial containment plate disposed outward of the axis of rotation with respect to the winding of the winding-pole set and constraining the winding from radially translating;

a tensioning apparatus whereby the axial containment plate is retained in position relative to the winding-pole set;

a first axially facing surface;

a second axially facing surface opposite the winding retention member from the first axially facing surface;

a cooling oil routing hole extending axially from the first axially facing surface, through the winding retention member, to the second axially facing surface, whereby cooling oil may travel axially through the axial containment plate, and

an oil flow path disposed between a rotor inlet orifice and the cooling oil routing hole whereby oil may flow in fluidic communication with the winding,

wherein the cooling oil routing hole is axially in-line with the winding.

2. The main stage generator rotor according to claim 1, wherein the main stage generator rotor comprises twelve winding-pole sets.

3. The main stage generator rotor according to claim 1, wherein the axial containment plate comprises an annulus.

4. The main stage generator rotor according to claim 1, further comprising a winding guide plate attached to the axial containment plate and disposed axially outward of the winding of the winding-pole set and in mechanical contact with the winding, and further disposed axially inward of the axial containment plate, and in mechanical contact with the axial containment plate.

5. The main stage generator rotor according to claim 4, wherein the winding guide plate further comprises a winding guide channel corresponding to shape of the winding of the winding-pole set.

6. The main stage generator rotor according to claim 5, wherein the winding guide plate further comprises a cooling oil guide channel comprising a trough cut transverse to the winding guide channel and permitting oil to flow through the winding guide channel.

7. The main stage generator rotor according to claim 6,

wherein the winding guide channel is circumferentially in-line with the cooling oil routing hole,

whereby the cooling oil may travel radially between the axial containment plate and the winding.

8. The main stage generator rotor according to claim 6, wherein the winding guide channel terminates in an aperture corresponding to the cooling oil routing hole of the axial containment plate.

9. A generator rotor system comprising:

a first exciter rotor;

a second exciter rotor;

a permanent magnet rotor;

a first main stage generator rotor; and

a second main stage generator rotor, wherein each of the first main stage generator rotor and the second main stage generator rotor share an axis of rotation;

wherein the first exciter rotor is disposed at an axial outboard end of the generator rotor system,

wherein the permanent magnet rotor is disposed at a second axial outboard end of the generator rotor system,

wherein the second exciter rotor is disposed adjacent to and axially inboard of the permanent magnet rotor,

wherein the first main stage generator rotor and the second main stage generator rotor are both disposed axially inboard of the first exciter rotor and the second exciter rotor, and

wherein each of the first main stage generator rotor and the second main stage generator rotor comprise;

a winding-pole set comprising a winding and a pole; and

a winding retention member;

wherein the axis of rotation has a radius,

wherein the winding retention member is disposed outboard of the winding-pole set along the axis of rotation,

whereby the winding of the winding-pole set is axially confined between the winding retention member and the pole of the winding-pole set, and

whereby the winding of the winding-pole set is constrained by the winding retention member from radially translating,

the winding retention member comprising;

an axial containment plate disposed outward of the axis of rotation with respect to the winding of the winding-pole set and constraining the winding from radially translating;

a tensioning apparatus whereby the axial containment plate is retained in position relative to the winding-pole set;

a first axially facing surface;

a second axially facing surface opposite the winding retention member from the first axially facing surface;

a cooling oil routing hole extending axially from the first axially facing surface, through the winding retention member, to the second axially facing surface, whereby cooling oil may travel axially through the axial containment plate, and

an oil flow path disposed between a rotor inlet orifice and the cooling oil routing hole whereby oil may flow in fluidic communication with the winding,

wherein the cooling oil routing hole is axially in-line with the winding.

10. The generator rotor system according to claim 9, wherein the first main stage generator rotor and the second main stage generator rotor each comprises twelve winding-pole sets.