Sensory fitting for monitoring bearing performance

• US 5,691,707 A
• Filed: 12/15/1995
• Issued: 11/25/1997
• Est. Priority Date: 12/15/1995
• Status: Expired due to Fees

• Current Assignee: Scientific Operating Systems, Inc.
• Original Assignee: Security Operating Systems Incorporated
• Inventors: Smith, Charles C., Bernard, Thomas R.
• Primary Examiner(s): MULLEN, THOMAS J
• Application Number:
  US08/573,428
• Time in Patent Office: 711 Days
• Field of Search: 340/682, 340/683, 73/593, 73/658, 73/660, 184/108, 184/105.2, 184/105.3, 184/6.4, 364/551.01, 364/508, 364/557, 116/101, 116/216, 246/169 A, 374/208
• US Class Current: 340/682
• CPC Class Codes: F16C 19/525 related to temperature and heat, e.g. insulation
• CPC Class Codes: F16C 19/527 related to vibration and noise
• CPC Class Codes: F16C 2380/26 Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators in general H02K
• CPC Class Codes: F16C 33/6622 Details of supply and/or removal of the grease, e.g. purging grease
• CPC Class Codes: F16C 35/047 with a base plate substantially parallel to the axis of rotation, e.g. horizontally mounted pillow blocks
• CPC Class Codes: G01M 13/045 Acoustic or vibration analysis

Abstract

Described is a device for monitoring bearing performance in apparatus having an aperture sized and configured to receive a grease fitting. The device includes a temperature sensing component or a vibration sensing components, or both, to enable detection of impending bearing failure, and is adapted to either replace or supplement conventional grease fittings.

Claims

1. A device for monitoring bearing performance in apparatus having at least one aperture sized and disposed to connectably receive a grease fitting for providing lubricant to said bearing, which device comprises a sensing fitting sized and configured to be connectably received in said aperture, said sensing fitting including (a) temperature sensing means to enable detection of impending bearing failure, (b) a connecting end sized and configured to be fixedly yet detachably received by said aperture and when installed in said aperture said connecting end being proximate to said beating, (c) an axial bore extending along the longitudinal axis of said sensing fitting for providing a grease path, and (d) a wire path extending through said connecting end and parallel with but offset from said axial bore of said sensing fitting, a portion of said temperature sensing means extending the length of said wire path.

2. A device according to claim 1 wherein said temperature sensing means comprises a thermistor temperature detector which undergoes a change in resistance in response to a change in temperature within said apparatus.

3. A device according to claim 2 wherein said detector is adapted to send a signal to a receiver capable of converting said signal into an audible or visual record of the temperature within said apparatus and/or producing an audible or visual alarm if the temperature reaches a preselected level.

4. A device according to claim 1 wherein said temperature sensing means comprises a thermocouple sensing element which undergoes a change in current in response to a change in temperature within said apparatus.

5. A device according to claim 4 wherein said element is adapted to send a signal to a receiver capable of converting said signal into an audible or visual record of the temperature within said apparatus and/or producing an audible or visual alarm if the temperature reaches a preselected level.

6. A device according to claim 1 wherein said sensing fitting is in addition a grease fitting for providing lubricant to said bearing.

7. A device according to claim 1 wherein said sensing fitting also includes a receiving end, and wherein the portion of said bore proximate to said receiving end being sized and configured to fixedly yet detachably receive a grease fitting.

8. A device for monitoring bearing performance in apparatus having at least one aperture sized and disposed to connectably receive a grease fitting for providing lubricant to said bearing, which device comprises a sensing fitting sized and configured to be connectably received in said aperture, said sensing fitting including (a) vibration sensing means to enable detection of impending bearing failure, (b) temperature sensing means to enable detection of impending bearing failure, (c) a connecting end sized and configured to be fixedly yet detachably received by said aperture and when installed in said aperture said connecting end being proximate to said bearing, (d) an axial bore extending along the longitudinal axis of said sensing fitting for providing a grease path, and (e) a wire path extending through said connecting end and parallel with but offset from said axial bore of said sensing fitting, a portion of said temperature sensing means extending the length of said wire path.

9. A device according to claim 8 wherein said sensing fitting is in addition a grease fitting for providing lubricant to said bearing.

10. A device according to claim 8 wherein said sensing fitting also includes a receiving end, and wherein the portion of said bore proximate to said receiving end being sized and configured to fixedly yet detachably receive a grease fitting.

11. A device according to claim 8 wherein said temperature sensing means comprises a thermistor temperature detector which undergoes a change in resistance in response to a change in temperature within said apparatus.

12. A device according to claim 11 wherein said sensing fitting is in addition a grease fittng for providing lubricant to said bearing.

13. A device according to claim 11 wherein said sensing fitting also includes a receiving end, and wherein the portion of said bore proximate to said receiving end being sized and configured to fixedly yet detachably receive a grease fitting.

14. A device according to claim 11 wherein said detector is adapted to send a signal to a receiver capable of converting said signal into an audible or visual record of the temperature within said apparatus and/or producing an audible or visual alarm if the temperature reaches a preselected level.

15. A device according to claim 11 wherein said vibration sensing means comprises a vibration sensor capable of detecting vibration within an x, y and/or z plane.

16. A device according to claim 15, wherein said sensor is adapted, upon detecting vibration within an x, y and/or z plane, to send a signal to a receiver capable of converting said signal into an audible or visual record of the vibration within said apparatus and/or producing an audible or visual alarm if the vibration reaches a preselected level.

17. A device according to claim 16, wherein said detector is adapted to send a signal to a receiver capable of convening said signal into an audible or visual record of the temperature within said apparatus and/or producing an audible or visual alarm if the temperature reaches a preselected level.

18. A device according to claim 17 wherein said detector and said sensor are adapted to constantly send their respective signal, and said receivers respectively are adapted to also trend data produced from conversion of the respective signals.

19. A device according to claim 17 wherein said sensing fitting is in addition a grease fitting for providing lubricant to said bearing.

20. A device according to claim 17 wherein said sensing fitting also includes a receiving end, and wherein the portion of said bore proximate to said receiving end being sized and configured to fixedly yet detachably receive a grease fitting.

21. A device according to claim 8 wherein said temperature sensing means comprises a thermocouple sensing element which undergoes a change in current in response to a change in temperature within said apparatus.

22. A device according to claim 21 wherein said element is adapted to send a signal to a receiver capable of convening said signal into an audible or visual record of the temperature within said apparatus and/or producing an audible or visual alarm if the temperature reaches a preselected level.

23. A device according to claim 22 wherein said vibration sensing means comprises a vibration sensor capable of detecting vibration within an x, y and/or z plane.

24. A device according to claim 23, wherein said sensor is adapted, upon detecting vibration within an x, y and/or z plane, to send a signal to a receiver capable of convening said signal into an audible or visual record of the vibration within said apparatus and/or producing an audible or visual alarm if the vibration reaches a preselected level.

25. A device according to claim 24 wherein said element and said sensor are adapted to constantly send their respective signals, and said receivers respectively are adapted to also trend data produced from conversion of the respective signals.

26. A device according to claim 24 wherein said sensing fitting is in addition a grease fitting for providing lubricant to said bearing.

27. A device according to claim 24 wherein said sensing fitting also includes a receiving end, and wherein the portion of said bore proximate to said receiving end being sized and configured to fixedly yet detachably receive a grease fitting.

28. A device according to claim 8 wherein said vibration sensing means comprises a vibration sensor capable of detecting vibration within an x, y and/or z plane.

29. A device according to claim 28, wherein said sensor is adapted, upon detecting vibration within an x, y and/or z plane, to send a signal to a receiver capable of convening said signal into an audible or visual record of the vibration within said apparatus and/or producing an audible or visual alarm if the vibration reaches a preselected level.

30. A device according to claim 29 wherein said sensing fitting is in addition a grease fitting for providing lubricant to said bearing.

31. A device according to claim 29 wherein said sensing fitting also includes a receiving end, and wherein the portion of said bore proximate to said receiving end being sized and configured to fixedly yet detachably receive a grease fitting.

33. Apparatus according to claim 30 wherein said temperature sensing means comprises a thermistor temperature detector which undergoes a change in resistance in response to a change in temperature within said housing and is adapted to send a signal to a receiver capable of converting said signal into an audible or visual record of the temperature within said housing and/or producing an audible or visual alarm if the temperature reaches a preselected level, and wherein said sensing fitting is in addition a grease fitting for providing lubricant to said bearing.

32. In apparatus which comprises a housing having a rotary shaft, at least one bearing in which said shaft is rotated, and at least one aperture sized and disposed to connectably receive a grease fitting for providing lubricant to said housing, the improvement wherein a sensing fitting for monitoring bearing performance is connectably received in said aperture, said sensing fitting including (a) temperature sensing means to enable detection of impending bearing failure, (b) a connecting end sized and configured to be fixedly yet detachably received by said aperture and when installed in said aperture said connecting end being proximate to said bearing, (c) an axial bore extending along the longitudinal axis of said sensing fitting for providing a grease path, and (d) a wire path extending through said connecting end and parallel with but offset from said axial bore of said sensing fitting, a portion of said temperature sensing means extending the length of said wire path.

34. Apparatus according to claim 32 wherein said temperature sensing means comprises a thermistor temperature detector which undergoes a change in resistance in response to a change in temperature within said housing and is adapted to send a signal to a receiver capable of converting said signal into an audible or visual record of the temperature within said housing and/or producing an audible or visual alarm if the temperature reaches a preselected level, and wherein said sensing fitting also includes a receiving end, and wherein the portion of said bore proximate to said receiving end being sized and configured to fixedly yet detachably receive a grease fitting.

35. Apparatus according to claim 32 wherein said temperature sensing means comprises a thermocouple sensing element which undergoes a change in current in response to a change in temperature within said housing and is adapted to send a signal to a receiver capable of converting said signal into an audible or visual record of the temperature within said housing and/or producing an audible or visual alarm if the temperature reaches a preselected level, and wherein said sensing fitting is in addition a grease fitting for providing lubricant to said bearing.

36. Apparatus according to claim 32 wherein said temperature sensing means comprises a thermocouple sensing element which undergoes a change in current in response to a change in temperature within said housing and is adapted to send a signal to a receiver capable of converting said signal into an audible or visual record of the temperature within said housing and/or producing an audible or visual alarm if the temperature reaches a preselected level, and wherein said sensing fitting also includes a receiving end, and wherein the portion of said bore proximate to said receiving end being sized and configured to fixedly yet detachably receive a grease fitting.

37. In apparatus which comprises a housing having a rotary shaft, at least one bearing in which said shaft is rotated, and at least one aperture sized and disposed to connectably receive a grease fitting for providing lubricant to said housing, the improvement wherein a sensing fitting for monitoring bearing performance is connectably received in said aperture, said sensing fitting including (a) vibration sensing means to enable detection of impending bearing failure, (b) temperature sensing means to enable detection of impending bearing failure, (c) a connecting end sized and configured to be fixedly yet detachably received by said aperture and when installed in said aperture said connecting end being proximate to said bearing, (d) an axial bore extending along the longitudinal axis of said sensing fitting for providing a grease path, and (e) a wire path extending through said connecting end and parallel with but offset from said axial bore of said sensing fitting, a portion of said temperature sensing means extending the length of said wire path.

38. Apparatus according to claim 37 wherein said temperature sensing means comprises a thermistor temperature detector which undergoes a change in resistance in response to a change in temperature within said housing and is adapted to send a signal to a receiver capable of converting said signal into an audible or visual record of the temperature within said housing and/or producing an audible or visual alarm if the temperature reaches a preselected level.

39. Apparatus according to claim 38 wherein said vibration sensing means comprises a vibration sensor capable of detecting vibration within an x, y and/or z plane and adapted, upon detecting such vibration, to send a signal to a receiver capable of converting said signal into an audible or visual record of the vibration within said housing and/or producing an audible or visual alarm if the vibration reaches a preselected level, and wherein said sensing fitting is in addition a grease fitting for providing lubricant to said bearing.

40. Apparatus according to claim 38 wherein said vibration sensing means comprises a vibration sensor capable of detecting vibration within an x, y and/or z plane and adapted, upon detecting such vibration, to send a signal to a receiver capable of converting said signal into an audible or visual record of the vibration within said housing and/or producing an audible or visual alarm if the vibration reaches a preselected level, and wherein said sensing fitting also includes a receiving end, and wherein the portion of said bore proximate to said receiving end being sized and configured to fixedly yet detachably receive a grease fitting.

41. Apparatus according to claim 37 wherein said temperature sensing means comprises a thermocouple sensing element which undergoes a change in current in response to a change in temperature within said housing and is adapted to send a signal to a receiver capable of converting said signal into an audible or visual record of the temperature within said housing and/or producing an audible or visual alarm if the temperature reaches a preselected level.

42. Apparatus according to claim 41 wherein said vibration sensing means comprises a vibration sensor capable of detecting vibration within an x, y and/or z plane and adapted, upon detecting such vibration, to send a signal to a receiver capable of converting said signal into an audible or visual record of the vibration within said housing and/or producing an audible or visual alarm if the vibration reaches a preselected level, and wherein said sensing fitting is in addition a grease fitting for providing lubricant to said bearing.

43. Apparatus according to claim 41 wherein said vibration sensing means comprises a vibration sensor capable of detecting vibration within an x, y and/or z plane and adapted, upon detecting such vibration, to send a signal to a receiver capable of converting said signal into an audible or visual record of the vibration within said housing and/or producing an audible or visual alarm if the vibration reaches a preselected level, and wherein said sensing fitting also includes a receiving end, and wherein the portion of said bore proximate to said receiving end being sized and configured to fixedly yet detachably receive a grease fitting.

44. Apparatus according to claim 37 wherein said vibration sensing means comprises a vibration sensor capable of detecting vibration within an x, y and/or z plane and adapted, upon detecting such vibration, to send a signal to a receiver capable of converting said signal into an audible or visual record of the vibration within said housing and/or producing an audible or visual alarm if the vibration reaches a preselected level, and wherein said sensing fitting is in addition a grease fitting for providing lubricant to said bearing.

45. Apparatus according to claim 37 wherein said vibration sensing means comprises a vibration sensor capable of detecting vibration within an x, y and/or z plane and adapted, upon detecting such vibration, to send a signal to a receiver capable of converting said signal into an audible or visual record of the vibration within said housing and/or producing an audible or visual alarm if the vibration reaches a preselected level, and wherein said sensing fitting also includes a receiving end, and wherein the portion of said bore proximate to said receiving end being sized and configured to fixedly yet detachably receive a grease fitting.

46. A method of monitoring bearing performance in apparatus having at least one aperture sized and disposed to connectably receive a grease fitting for providing lubricant to said bearing, said method comprising placing in said aperture a sensing fitting sized and configured to be connectably received in said aperture, said sensing fitting including (a) temperature sensing means to enable detection of impending bearing failure, (b) a connecting end sized and configured to be fixedly yet detachably received by said aperture and when installed in said aperture said connecting end being proximate to said bearing, (c) an axial bore extending along the longitudinal axis of said sensing fitting for providing a grease path, and (d) a wire path extending through said connecting end and parallel with but offset from said axial bore of said sensing fitting, a portion of said temperature sensing means extending the length of said wire path.

47. A method according to claim 46 wherein said temperature sensing means comprises a thermistor temperature detector which undergoes a change in resistance in response to a change in temperature within said apparatus and is adapted to send a signal to a receiver capable of converting said signal into an audible or visual record of the temperature within said apparatus and/or producing an audible or visual alarm if the temperature reaches a preselected level, and wherein said sensing fitting is in addition a grease fitting for providing lubricant to said bearing.

48. A method according to claim 46 wherein said temperature sensing means comprises a thermistor temperature detector which undergoes a change in resistance in response to a change in temperature within said apparatus and is adapted to send a signal to a receiver capable of converting said signal into an audible or visual record of the temperature within said apparatus and/or producing an audible or visual alarm if the temperature reaches a preselected level, and wherein said sensing fitting also includes a receiving end, and wherein the portion of said bore proximate to said receiving end being sized and configured to fixedly yet detachably receive a grease fitting.

49. A method according to claim 46 wherein said temperature sensing means comprises a thermocouple sensing element which undergoes a change in current in response to a change in temperature within said apparatus and is adapted to send a signal to a receiver capable of converting said signal into an audible or visual record of the temperature within said apparatus and/or producing an audible or visual alarm if the temperature reaches a preselected level, and wherein said sensing fitting is in addition a grease fitting for providing lubricant to said bearing.

50. A method according to claim 46 wherein said temperature sensing means comprises a thermocouple sensing element which undergoes a change in current in response to a change in temperature within said apparatus and is adapted to send a signal to a receiver capable of converting said signal into an audible or visual record of the temperature within said apparatus and/or producing an audible or visual alarm if the temperature reaches a preselected level, and wherein said sensing fitting also includes a receiving end, and wherein the portion of said bore proximate to said receiving end being sized and configured to fixedly yet detachably receive a grease fitting.

51. A method of monitoring bearing performance in apparatus having at least one aperture sized and disposed to connectably receive a grease fitting for providing lubricant to said bearing, said method comprising placing in said aperture a sensing fitting sized and configured to be connectably received in said aperture, said sensing fitting including (a) vibration sensing means to enable detection of impending bearing failure, (b) temperature sensing means to enable detection of impending bearing failure, (c) a connecting end sized and configured to be fixedly yet detachably received by said aperture and when installed in said aperture said connecting end being proximate to said bearing, (d) an axial bore extending along the longitudinal axis of said sensing fitting for providing a grease path, and (e) a wire path extending through said connecting end and parallel with but offset from said axial bore of said sensing fitting, a portion of said temperature sensing means extending the length of said wire path.

52. A method according to claim 51 wherein said temperature sensing means comprises a thermistor temperature detector which undergoes a change in resistance in response to a change in temperature within said apparatus and is adapted to send a signal to a receiver capable of converting said signal into an audible or visual record of the temperature within said apparatus and/or producing an audible or visual alarm if the temperature reaches a preselected level.

53. A method according to claim 52, wherein said vibration sensing means comprises a vibration sensor capable of detecting vibration within an x, y and/or z plane and adapted, upon detecting such vibration, to send a signal to a receiver capable of converting said signal into an audible or visual record of the vibration within said apparatus and/or producing an audible or visual alarm if the vibration reaches a preselected level, and wherein said sensing fitting is in addition a grease fitting for providing lubricant to said bearing.

54. A method according to claim 52, wherein said vibration sensing means comprises a vibration sensor capable of detecting vibration within an x, y and/or z plane and adapted, upon detecting such vibration, to send a signal to a receiver capable of converting said signal into an audible or visual record of the vibration within said apparatus and/or producing an audible or visual alarm if the vibration reaches a preselected level, and wherein said sensing fitting also includes a receiving end, and wherein the portion of said bore proximate to said receiving end being sized and configured to fixedly yet detachably receive a grease fitting.

55. A method according to claim 51 wherein said temperature sensing means comprises a thermocouple sensing element which undergoes a change in current in response to a change in temperature within said apparatus and is adapted to send a signal to a receiver capable of converting said signal into an audible or visual record of the temperature within said apparatus and/or producing an audible or visual alarm if the temperature reaches a preselected level.

56. A method according to claim 55, wherein said vibration sensing means comprises a vibration sensor capable of detecting vibration within an x, y and/or z plane and adapted, upon detecting such vibration, to send a signal to a receiver capable of converting said signal into an audible or visual record of the vibration within said apparatus and/or producing an audible or visual alarm if the vibration reaches a preselected level, and wherein said sensing fitting is in addition a grease fitting for providing lubricant to said bearing.

57. A method according to claim 55, wherein said vibration sensing means comprises a vibration sensor capable of detecting vibration within an x, y and/or z plane and adapted, upon detecting such vibration, to send a signal to a receiver capable of converting said signal into an audible or visual record of the vibration within said apparatus and/or producing an audible or visual alarm if the vibration reaches a preselected level, and wherein said sensing fitting also includes a receiving end, and wherein said sensing fitting has an axial bore along its longitudinal axis for providing a grease path, the portion of said bore proximate to said receiving end being sized and configured to fixedly yet detachably receive a grease fitting.

58. A method according to claim 51, wherein said vibration sensing means comprises a vibration sensor capable of detecting vibration within an x, y and/or z plane and adapted, upon detecting such vibration, to send a signal to a receiver capable of converting said signal into an audible or visual record of the vibration within said apparatus and/or producing an audible or visual alarm if the vibration reaches a preselected level, and wherein said sensing fitting is in addition a grease fitting for providing lubricant to said bearing.

59. A method according to claim 51, wherein said vibration sensing means comprises a vibration sensor capable of detecting vibration within an x, y and/or z plane and adapted, upon detecting such vibration, to send a signal to a receiver capable of converting said signal into an audible or visual record of the vibration within said apparatus and/or producing an audible or visual alarm if the vibration reaches a preselected level, and wherein said sensing fitting also includes a receiving end, and wherein the portion of said bore proximate to said receiving end being sized and configured to fixedly yet detachably receive a grease fitting.