One-piece rotor shaft for two-pole rotor

• US 5,323,080 A
• Filed: 05/07/1993
• Issued: 06/21/1994
• Est. Priority Date: 05/07/1993
• Status: Expired due to Term

• Current Assignee: Sundstrand Corporation (Rtx Corporation)
• Original Assignee: Sundstrand Corporation (Rtx Corporation)
• Inventors: Rasmussen, Roy D., Iseman, Walter, Shahamat, Mohammad, Johnsen, Tyrone A.
• Primary Examiner(s): SKUDY, ROBERT
• Application Number:
  US08/059,034
• Time in Patent Office: 410 Days
• Field of Search: 310/261, 310/216, 310/262, 310/263, 310/264, 310/265, 310/179, 310/180, 310/42, 310/194, 310/91, 310/214, 29/598
• US Class Current: 310/216.122
• CPC Class Codes: H02K 1/24 Rotor cores with salient poles ; Variable reluctance rotors
• CPC Class Codes: H02K 1/28 Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures

Abstract

A two-pole generator rotor assembly including a one-piece shaft, a prewound field coil assembly and a one-piece shaft. The one piece shaft includes a pair of axially spaced shaft end portions and a substantially cylindrical portion integrally formed with the spaced shaft end portions and interposed therebetween. The substantially cylindrical central portion includes a through slot for accommodating the prewound field coil assembly, with the through slot including a pair of opposed wall portions adapted to engage an outer peripheral portion of the prewound field coil assembly and provide means for retention of the prewound field coil.

Claims

1. A two-pole generator rotor assembly comprising a prewound field coil assembly and a shaft means mounting the prewound field coil assembly, said shaft means including a pair of axially spaced shaft end portions and a substantially cylindrical portion integrally formed with said spaced shaft end portions and interposed therebetween so as to form a one-piece shaft, said substantially cylindrical central portion having a through-slot means for accommodating the prewound field coil assembly therein, said through-slot means including a pair of opposed wall portions adapted to engage an outer peripheral portion of the prewound field coil assembly.

2. A two-pole generator rotor assembly according to claim 1, including means for axially positioning the prewound field coil assembly within said through-slot means.

3. A two-pole generator rotor assembly according to claim 2, wherein said means for axially positioning said prewound field coil assembly within said through-slot means are provided by axially directed restraining means in one of said shaft end portions.

4. A two-pole generator rotor assembly according to claim 3, wherein said axially directed restraining means includes an axially directed threaded bore in at least one of said shaft end portions and a threaded member.

5. A two-pole generator rotor assembly according to claim 4, wherein said at least one threaded member is a set screw.

6. A two-pole generator rotor assembly according to claim 3, wherein said pair of opposed wall portions are substantially flat.

7. A two-pole generator rotor assembly according to claim 6, wherein the outer peripheral portion of the field coil assembly is substantially flat.

8. A two-pole generator rotor assembly according to claim 7, Wherein said through-slot means has a substantially rectangular configuration when viewed in an insertion direction of the field coil assembly into the through-slot means.

9. A two-pole generator rotor assembly according to claim 8, wherein the field coil assembly includes support means for supporting a prewound field coil, and wherein the substantially cylindrical portion has a diameter corresponding to a diameter of arcuate peripheral portions of the support means such that when the field coil assembly is inserted into the through slot means, the rotor assembly has a substantially cylindrical outer periphery.

10. A two-pole generator rotor assembly according to claim 9, including a sleeve axially slidable over the rotor assembly when the rotor assembly is exposed to low temperatures and secured in place during normal ambient temperature.

11. A two-pole generator rotor assembly according to claim 10, wherein said sleeve is made of a non-metallic, composite construction.

12. A two-pole generator rotor assembly according to claim 2, wherein said means for axially positioning said prewound field coil assembly within said through-slot means are provided by radially directed fastening means in one of said wedge portions.

13. A two-pole generator rotor assembly according to claim 12, wherein said radially directed fastening means includes a radially directed threaded bore in at least one of said opposed wall portions and a threaded member.

14. A two-pole generator rotor assembly according to claim 1, wherein said pair of opposed wall portions are substantially flat.

15. A two-pole generator rotor assembly according to claim 1, wherein the outer peripheral portion of the field coil assembly is substantially flat.

16. A two-pole generator rotor assembly according to claim 1, wherein said through slot means has a substantially rectangular configuration when viewed in an insertion direction of the field coil assembly into the through slot means.

17. A two-pole generator rotor assembly according to claim 1, wherein the field coil assembly includes a support means for supporting a prewound field coil, and wherein the substantially cylindrical portion has a diameter corresponding to a diameter of arcuate peripheral portions of the support means such that when the field coil assembly is inserted into the through slot means, the rotor assembly has a substantially cylindrical outer periphery.

18. A two-pole generator rotor assembly according to claim 1, further comprising a sleeve axially slidable over the generator rotor assembly for forming an oil containment.

19. A two-pole generator rotor assembly according to claim 18, wherein said sleeve is made of a non-metallic, composite construction.