End winding support segment with integrated lubricant manifold

• US 10,333,365 B2
• Filed: 01/16/2015
• Issued: 06/25/2019
• Est. Priority Date: 01/16/2015
• Status: Active Grant

• Current Assignee: Hamilton Sundstrand Corporation (Rtx Corporation)
• Original Assignee: Hamilton Sundstrand Corporation (Rtx Corporation)
• Inventors: Patel, Dhaval, Hufstedler, Glenn W., Martin, Ted A., Brust, Eric A., Maconaghy, Shaun, Koester, Kevin J., Smith, Doren C., Hanson, Alan D., Sherman, William D.
• Primary Examiner(s): Mullins, Burton S
• Application Number:
  US14/598,777
• Publication Number:
  US 20160211712A1
• Time in Patent Office: 1,621 Days
• Field of Search: 310194, 310216, 310105, 310216115, 310270
• CPC Class Codes: H02K 3/30 Windings characterised by the insulating material
• CPC Class Codes: H02K 3/38 around winding heads, equalising connectors, or connections thereto
• CPC Class Codes: H02K 3/527 applicable to rotors only
• CPC Class Codes: H02K 5/203 specially adapted for liquids, e.g. cooling jackets
• CPC Class Codes: H02K 7/003 Couplings; Details of shafts means for mounting rotors on shafts H02K1/28
• CPC Class Codes: H02K 9/19 for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Abstract

An end winding support segment for a generator rotor includes a support segment body with a curved inner surface configured to be adjacent to a rotor shaft, a winding support arm extending radially outward from the support segment body, and an orifice extending from the curved inner surface of the support to an exterior surface of the support adjacent the winding support arm with the orifice configured to transfer lubricant from a surface of the rotor shaft to a winding located on the winding support arm.

Claims

1. An end winding support segment for a generator rotor comprising:

a support segment body with a curved inner surface between a first circumferential end and a second circumferential end configured to be adjacent to a rotor shaft;

a winding support arm extending radially outward from the support segment body;

a groove on the curved inner surface of the support segment body, the groove having a depth that is varied as the groove extends circumferentially between the first circumferential end of the support segment body and the second circumferential end of the support segment body; and

an orifice extending from the groove to an exterior surface of the support segment body adjacent the winding support arm.

2. The end winding support segment of claim 1, wherein at least two winding support arms extend radially outward from the support segment body.

3. The end winding support segment of claim 2, wherein the at least two winding support arms extend outward from the support segment body at an angle perpendicular to the curved inner surface of the support segment body.

4. The end winding support segment of claim 2, wherein the at least two winding support arms extend radially outward from the support segment body at approximately a 90 degree angle from one another.

5. The end winding support segment of claim 1, wherein the depth of the groove is reduced near the first circumferential end and the second circumferential end of the support segment body.

6. The end winding support segment of claim 1, wherein at least two orifices are arranged to provide a sufficient amount of lubricant to the winding.

7. The end winding support segment of claim 1, wherein a winding contact surface of the winding support arm is crowned.

8. The end winding support segment of claim 1, wherein the end winding support segment is constructed from plastic.

9. A rotor for a generator comprising:

a shaft;

a rotor core radially outward from the shaft and having a plurality of poles spanning axially along the rotor core;

a plurality of end winding support segments that together circumferentially encircle the shaft, each end winding support segment being radially outward from the shaft, adjacent to the rotor core on a flat back surface, and adjacent to another end winding support segment on a circumferential surface, each end winding support segment comprising;

a support segment body with a curved inner surface adjacent to the shaft extending between a first circumferential end and a second circumferential end;

at least one winding support arm extending radially outward from the support segment body and having a flat back surface adjacent to a corresponding pole of the rotor core; and

at least one orifice extending from the curved inner surface of the support segment body to an exterior surface of the support segment body adjacent the at least one winding support arm;

a groove on the curved inner surface of the support segment body, the groove having a depth that is reduced in a circumferential direction near the first circumferential end and the second circumferential end of the support segment body to prevent excessive lubricant loss into seams between adjacent end winding support segments; and

a plurality of windings, each winding being wrapped axially around each of the at least one winding support arm and a corresponding pole of the rotor core.

10. The plurality of end winding support segments of claim 9, wherein the at least one winding support arm of each end winding support segment has a crowned winding contact surface opposite the flat back surface.

11. The rotor of claim 9, wherein the plurality of end winding support segments includes two ending winding support segments that each extend half way around a circumference of the shaft.

12. The rotor of claim 9, wherein each end winding support segment of the plurality of end winding support segments includes at least two orifices.