HIGH SPEED GENERATOR ROTOR DESIGN INCORPORATING POSITIVELY RESTRAINED BALANCE RINGS

• US 20080272671A1
• Filed: 05/04/2007
• Published: 11/06/2008
• Est. Priority Date: 05/04/2007
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: SCHERZINGER, WILLIAM M., WADDELL, SIMON L., McDOWALL, GREGOR
• Granted Patent: US 7,687,968 B2
• Time in Patent Office: Days
• US Class Current: 310/261
• CPC Class Codes: H02K 1/24 Rotor cores with salient poles ; Variable reluctance rotors
• CPC Class Codes: H02K 15/165 Balancing the rotor
• CPC Class Codes: H02K 7/04 Balancing means
• CPC Class Codes: Y10T 29/49012 Rotor

Abstract

A generator may incorporate a positively restrained balance ring. A generator may include a rotor core including a rotor, and a balance ring. The balance ring may include a weight. The balancer may include a plurality of balance holes in the ring, at least one of the plurality of balance holes to receive a weighted insert. A method of balancing a rotor of a generator may include mounting a balance ring adjacent to a rotor core, and adjusting weights to be located at one or more of a plurality of positions equally spaced around the balance ring to balance the rotor.

Claims

1. A generator, comprising:

a rotor core including a rotor; and

a balance ring comprising a balancer including a weight.

2. The generator of claim 1, wherein the balancer comprises a plurality of balance holes in the balance ring, at least one of the plurality of balance holes to receive a weighted insert.

3. The generator of claim 1, further comprising a plurality of end turns wherein the balance ring supports the plurality of end turns.

4. The generator of claim 3, wherein the balance ring further comprises a protrusion extending from the balance ring towards the rotor core

5. The generator of claim 1, wherein the balance ring further comprises an oil relief hole extending from a first side of the balance ring through the balance ring to a second side of the balance ring.

6. The generator of claim 2, wherein at least one of the plurality of balance holes is located in a first side of the balance ring and comprises a small hole extending from inside the balance hole out through a second side of the balance ring.

7. The generator of claim 2, wherein the plurality of balance holes are equally spaced apart from one another around the balance ring.

8. The generator of claim 1, wherein the generator further comprises four poles.

20. The method of balancing a rotor of a generator of claim 8, wherein the adjusting of weights to be located at positions equally spaced around the balance ring to balance the rotor comprises inserting weighted inserts into at least one of a plurality of balance holes located at positions equally spaced apart from one another around the balance ring.

9. A generator, comprising:

a rotor core including a rotor;

a balance ring adjacent to the rotor core, the balance ring comprising a plurality of balance holes, at least one of the balance holes to receive a balance weight to balance rotation of the rotor; and

a rotor can over the rotor core and the balance ring.

10. The generator of claim 9, further comprising a plurality of end turns wherein the balance ring supports the plurality of end turns.

11. The generator of claim 9, wherein the rotor can is secured to the rotor core and the balance ring by interference fit.

12. The generator of claim 9, wherein the rotor can comprises:

a first portion; and

a second portion including a lip,

wherein the balance ring is secured in-between the lip and the rotor core.

13. The generator of claim 10, wherein the balance ring further comprises a protrusion extending from the balance ring to the rotor core.

14. The generator of claim 9, wherein the balance ring further comprises an oil relief hole extending through the balance ring.

15. The generator of claim 9, wherein at least one of the plurality of balance holes comprises a small hole extending from inside the balance hole out through a side of the balance ring opposite a side in which the plurality of balance holes are located.

16. The generator of claim 9, wherein the plurality of balance holes are equally spaced apart from one another around the balance ring.

17. The generator of claim 9, wherein the generator further comprises four poles.

18. A method of balancing a rotor of a generator, comprising:

mounting a balance ring adjacent to a rotor core; and

adjusting weights to be located at least one of a plurality of positions equally spaced around the balance ring to balance the rotor.

19. The method of balancing a rotor of a generator of claim 18, wherein the mounting of the balance ring adjacent to the rotor core comprises mounting the balance ring in a rotor can wrapped around the rotor core and extending beyond an end of the rotor core.