Rotatable assemblies having chemically bonded lamination stacks

• US 7,224,096 B2
• Filed: 07/03/2004
• Issued: 05/29/2007
• Est. Priority Date: 10/16/1997
• Status: Expired due to Fees

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Meacham, Walter L., Menon, Mambailykalathil N.
• Primary Examiner(s): NGUYEN, TRAN N
• Application Number:
  US10/884,418
• Publication Number:
  US 20050034295A1
• Time in Patent Office: 1,060 Days
• Field of Search: 310/45, 310/216, 310/217, 310/261, 295/98, 296/09, 336/213, 336/219, 336/234
• US Class Current: 310/216.065
• CPC Class Codes: F16C 32/0468 of moving parts of the magnetic circuit, e.g. of the rotor
• CPC Class Codes: H02K 1/02 characterised by the magnetic material
• CPC Class Codes: H02K 1/04 characterised by the material used for insulating the magnetic circuit or parts thereof
• CPC Class Codes: H02K 1/06 characterised by the shape, form or construction
• CPC Class Codes: H02K 1/24 Rotor cores with salient poles ; Variable reluctance rotors
• CPC Class Codes: H02K 15/02 of stator or rotor bodies
• CPC Class Codes: Y10T 29/49009 Dynamoelectric machine
• CPC Class Codes: Y10T 29/49012 Rotor

Abstract

A rotor assembly or other rotating device having a stack of laminations or laminates that are chemically bonded together. Chemical bond of the laminates may have a strength that approaches the strength of the material of metal laminates. Chemical bonds may be effective in holding the laminates at temperatures when subject to rigorous mechanical operations such as high rotation speed and vibration.

Claims

1. A rotatable assembly for a machine, comprising:

a stack of laminations, each lamination formed from a material; and

a chemical bonding agent disposed over axial facing surfaces of each of the laminations, the laminations being bonded together by the chemical bonding agent such that the laminations maintain a bond at operating temperatures over 1000 degrees Fahrenheit.

2. The assembly of claim 1, wherein the chemical bonding agent is selected from a group consisting of glass, metallic-oxides, silicates and nitrides of silicon.

3. The assembly of claim 1, wherein the chemical bonding agent is a material having a low dielectric constant.

4. The assembly of claim 1, wherein the material is a soft magnetic material.

5. The assembly of claim 4, wherein the soft magnetic material is iron-cobalt.

6. The assembly of claim 4, wherein the soft magnetic material is silicon steel.

7. The assembly of claim 1, wherein the laminations and the chemical bonding agent have matching coefficients of thermal expansion.

8. The assembly of claim 1, the chemical bonding agent provides magnetic insulation between the bonded laminations.

9. The assembly of claim 1, further comprising a metallic layer on the surfaces of each of the laminations.

10. The assembly of claim 9, wherein the metallic layer is an interface to protect lamination from oxidation and to chemically bond with the dielectric bonding agent.

11. The assembly of claim 1, further comprising:

first and second end caps bonded to the laminations by the chemical bonding agent; and

a shaft bonded by the chemical bonding agent to a bore defined by the laminations.

51. The assembly of claim 1, wherein a chemical bonding agent is disposed over radial facing surfaces of each of the laminations.

12. A machine comprising:

a housing;

a stator assembly mounted to the housing; and

a rotor assembly including a shaft, a stack of laminations mounted to the shaft, each lamination formed from a material; and

a chemical bonding agent disposed over axial facing surfaces of each of the laminations, the laminations being bonded together by the chemical bonding agent, such that the laminations maintain a bond in operating temperatures over 1000 degrees Fahrenheit, the shaft being bonded to the stack of laminations by the chemical bonding agent.

13. The machine of claim 12, wherein the chemical bonding agent is selected from a group consisting of glass, metallic-oxides, silicates, and nitrides of silicon.

14. The machine of claim 12, wherein the chemical bonding agent is a material having a low dielectric constant.

15. The machine of claim 12, wherein the material is a soft magnetic material.

16. The machine of claim 15, wherein the soft magnetic material is iron-cobalt.

17. The machine of claim 15, wherein the soft magnetic material is silicon steel.

18. The machine of claim 12, wherein the laminations and the chemical bonding agent have matching coefficients of thermal expansion.

19. The machine of claim 12, wherein the bonding agent provides magnetic insulation between the laminations.

20. The machine of claim 12, further comprising:

first and second end caps bonded to the laminations by the chemical bonding agent; and

a plurality of bearings for supporting the rotor assembly within the housing.

52. The machine of claim 12, wherein a chemical bonding agent is disposed over radial facing surfaces of each of the laminations.

21. A rotor assembly for a machine, comprising:

a stack of laminations, each lamination formed from a material; and

a chemical bonding agent disposed over axial facing surfaces of each of the laminations, the laminations being bonded together by the chemical bonding agent, such that the laminations maintain a bond in operating temperatures up to 1000 degrees Fahrenheit, and the laminations and the chemical bonding agent having substantially matching coefficients of thermal expansion, the bonding agent providing magnetic insulation between the bonded laminations.

22. The assembly of claim 21, wherein the chemical bonding agent is selected from a group consisting of metallic oxides, glass, silicates, and nitrides of silicon.

23. The assembly of claim 21, wherein the chemical bonding agent is a material having a low dielectric constant.

24. The assembly of claim 21, wherein the material is a soft magnetic material.

25. The assembly of claim 24 wherein the soft magnetic material is iron-cobalt.

26. The assembly of claim 24, wherein the soft magnetic material is silicon steel.

27. The assembly of claim 21, further comprising:

first and second end caps bonded to the laminations by the chemical bonding agent; and

a shaft bonded by the chemical bonding agent to a bore defined by the laminations.

53. The assembly of claim 21, wherein a chemical bonding agent is disposed over radial facing surfaces of each of the laminations.

28. A machine comprising:

a housing;

a stator assembly mounted to the housing; and

a rotor assembly including a shaft, a stack of laminations mounted to the shaft, each lamination formed from a soft magnetic material; and

a chemical bonding agent disposed over axial facing surfaces of each of the laminations, the laminations being bonded together by the chemical bonding agent, such that the laminations maintain a bond in operating temperatures up to 1000 degrees Fahrenheit, and the laminations and the chemical bonding agent having matching coefficients of thermal expansion, the shaft being bonded to the stack of laminations by the chemical bonding agent.

29. The machine of claim 28, wherein the chemical bonding agent is selected from a group consisting of metallic oxides, glass, silicates, and nitrides of silicon.

30. The machine of claim 28, wherein the chemical bonding agent is a having a low dielectric constant.

31. The machine of claim 28, wherein the soft magnetic material is iron-cobalt.

32. The machine of claim 28, wherein the soft magnetic material is silicon steel.

33. The machine of claim 30, wherein the bonding agent provides magnetic insulation between the laminations.

34. The machine of claim 30, further comprising:

first and second end caps bonded to the laminations by the chemical bonding agent; and

a plurality of bearings for supporting the rotor assembly within the housing.

54. The machine of claim 28, wherein a chemical bonding agent is disposed over radial facing surfaces of each of the laminations.

35. A machine comprising:

a housing;

a rotor assembly including a shaft,

a stator assembly mounted to the housing, having a stack of laminations, each lamination formed from a soft magnetic material; and

a chemical bonding agent disposed over axial facing surfaces of each of the laminations, the laminations being bonded together by the chemical bonding agent, such that the laminations maintain a bond in operating temperatures up to 1000 degrees Fahrenheit, and the laminations and the chemical bonding agent having matching coefficients of thermal expansion, the shaft being bonded to the stack of laminations by the chemical bonding agent.

36. The machine of claim 35, wherein the chemical bonding agent is selected from a group consisting of metallic oxides, glass, silicates, and nitrides of silicon.

37. The machine of claim 35, wherein the chemical bonding agent is a having a low dielectric constant.

38. The machine of claim 35, wherein the soft magnetic material is iron-cobalt.

39. The machine of claim 35, wherein the soft magnetic material is silicon steel.

40. The machine of claim 37, wherein the bonding agent provides magnetic insulation between the laminations.

41. The machine of claim 37, further comprising first and second end caps bonded to the laminations by the chemical bonding agent.

42. The machine of claim 37, further comprising a sleeve or housing bonded to an outer diameter or inner diameter of the laminations by the chemical bonding agent.

55. The machine of claim 35, wherein a chemical bonding agent is disposed over radial facing surfaces of each of the laminations.

43. A machine comprising:

a housing;

a rotor assembly including a shaft,

a stator assembly mounted to the housing, having a stack of laminations, each lamination formed from a soft magnetic material; and

a chemical bonding agent disposed over axial facing surfaces of each of the laminations, the laminations being bonded together by the chemical bonding agent, such that the laminations maintain a bond in operating temperatures over 1000 degrees Fahrenheit, and the laminations and the chemical bonding agent having matching coefficients of thermal expansion, the shaft being bonded to the stack of laminations by the chemical bonding agent.

44. The machine of claim 43, wherein the chemical bonding agent is selected from a group consisting of metallic oxides, glass, silicates, and nitrides of silicon.

45. The machine of claim 43, wherein the chemical bonding agent is a having a low dielectric constant.

46. The machine of claim 43, wherein the soft magnetic material is iron-cobalt.

47. The machine of claim 43, wherein the soft magnetic material is silicon steel.

48. The machine of claim 45, wherein the bonding agent provides magnetic insulation between the laminations.

49. The machine of claim 45, further comprising first and second end caps bonded to the laminations by the chemical bonding agent.

50. The machine of claim 45, further comprising a sleeve or housing bonded to an outer diameter or inner diameter of the laminations by the chemical bonding agent.

56. The machine of claim 43, wherein a chemical bonding agent is disposed over radial facing surfaces of each of the laminations.