Rotating machine active balancer and method of dynamically balancing a rotating machine shaft with torsional vibrations

• US 7,717,013 B2
• Filed: 07/11/2005
• Issued: 05/18/2010
• Est. Priority Date: 07/12/2004
• Status: Active Grant

• Current Assignee: Lord Corporation (Parker-Hannifin Corporation)
• Original Assignee: Lord Corporation (Parker-Hannifin Corporation)
• Inventors: Miller, Lane, Hildebrand, Stephen
• Primary Examiner(s): CHAPMAN JR, JOHN E
• Application Number:
  US11/178,860
• Publication Number:
  US 20060005623A1
• Time in Patent Office: 1,772 Days
• Field of Search: 745/702, 745/711, 745/722, 745/742, 464/180, 734/68, 734/70
• US Class Current: 74/574.2
• CPC Class Codes: F16F 15/1414 Masses driven by elastic elements F16F15/145, F16F15/1464 take precedence
• CPC Class Codes: F16F 15/322 the rotating body being a shaft F16F15/34, F16F15/36 take precedence
• CPC Class Codes: F16F 15/36 operating automatically , i.e. where, for a given amount of unbalance, there is movement of masses until balance is achieved damping vibrations of washing machines by displacing, supplying or ejecting a material, e.g. liquid, into or from counterbalancing pockets D06F37/245
• CPC Class Codes: G01M 1/36 by adjusting position of masses built-in the body to be tested
• CPC Class Codes: Y10T 74/2128 Damping using swinging masses, e.g., pendulum type, etc.

Abstract

An active balancer for dynamically balancing a rotating machine is provided. The active balancer has a balancer body which rotates with the rotating machine and at least one controllable position counter weight having a real-time adjustable position relative to the balancer body and the rotating machine inorder to produce an actively adjustable controllable counter weight balance force for dynamically balancing the rotating machine. The active balancer includes a spring with the balancer body mounted to the rotating machine through the spring wherein the balancer body mass resonates on the spring with a torsional vibration canceling frequency which cancels a torsional vibration of the rotating machine.

Claims

1. An active balancer for dynamically balancing a rotating machine having a driven shaft with a torsional vibration, said active balancer having a balancer body which rotates with said shaft, said balancer body having a mass, said active balancer comprised of a first controllable position counter weight balance ring rotor and a second controllable position counter weight balance ring rotor, said first controllable position counter weight balance ring rotor having a first balance ring rotor adjustable angular position relative to said balancer body and said shaft with said first controllable position counter weight balance ring rotor moved relative to said shaft and said balancer body with a first balance ring rotor controllable electromagnetic field, said second controllable position counter weight balance ring rotor having a second balance ring rotor adjustable angular position relative to said balancer body and said shaft with said second controllable position counter weight balance ring rotor moved relative to said shaft and said balancer body with a second balance ring rotor controllable electromagnetic field in order to produce an adjustable controllable counter weight balance force for continuously dynamically balancing said rotating machine, said balancer including a spring, said balancer body mounted to said shaft through said spring wherein said balancer body mass continuously rotates with said shaft, and said balancer body mass resonates on said spring with a torsional vibration canceling frequency which cancels the torsional vibration of said shaft.

2. An active balancer as claimed in claim 1, including a means for actively controlling said first balance ring rotor adjustable angular position separately from said second balance ring rotor adjustable angular position.

3. An active balancer as claimed in claim 1, wherein said active balancer is comprised of a first controllable position counter weight and a second controllable position counter weight.

4. An active balancer as claimed in claim 3, wherein said first controllable position counter weight and said second controllable position counter weight produce a net balance correction vector.

5. An active balancer as claimed in claim 3, wherein said active balancer includes a controller which controls and actuates the position of said first controllable position counter weight and the position of said second controllable position counter weight.

6. An active balancer as claimed in claim 1, wherein said spring is comprised of an elastomer.

7. An active balancer as claimed in claim 1, wherein said spring provides a resilient flexure interface between said balancer body mass and said shaft with said balancer body mass having a delayed oscillation which destructively interferes with said shaft torsional vibration.

8. An active balancer as claimed in claim 1, wherein said spring is comprised of a plurality of radiating spokes.

9. An active balancer as claimed in claim 1, further including a second active balancer, said second active balancer positioned on said driven shaft at a second position distal from said active balancer, said second active balancer having a second balancer body mass and a second balancer spring, said second active balancer mounted to said shaft through said second balancer spring at said second position wherein said second balancer body mass resonates on said second balancer spring with a second balancer torsional vibration canceling frequency which cancels a torsional vibration.

10. An active balancer as claimed in claim 1, wherein said first controllable position counter weight balance ring rotor is held with a first balance ring magnet holding force at said first balance ring rotor adjustable angular position and said second controllable position counter weight balance ring rotor is held with a second balance ring magnet holding force at said second balance ring rotor adjustable angular position.

11. A method of actively balancing a rotating member having a torsional vibration, said method including providing an active balancer having a balancer body which rotates with said rotating member, said balancer body having a mass, said active balancer comprised of a first controllable position counter weight balance ring rotor and a second controllable position counter weight balance ring rotor, said first controllable position counter weight balance ring rotor having a first balance ring rotor adjustable angular position relative to said balancer body and said rotating member with said first controllable position counter weight balance ring rotor moved relative to said rotating member and said balancer body with a first balance ring rotor controllable electromagnetic field, said second controllable position counter weight balance ring rotor having a second balance ring rotor adjustable angular position relative to said balancer body and said rotating member with said second controllable position counter weight balance ring rotor moved relative to said rotating member and said balancer body with a second balance ring rotor controllable electromagnetic field inorder to produce an adjustable controllable counter weight balance force for continuously dynamically balancing said rotating member, providing a spring, mounting said active balancer to said rotating member with said spring wherein said balancer body mass resonates on said spring with a torsional vibration canceling frequency which cancels the torsional vibration of said rotating member.

12. A method as claimed in claim 11, wherein providing an active balancer with at least one controllable position counter weight includes providing an active balancer with an electromagnetically actuated counter weight which is electromagnetically moved around said rotating member.

13. A method as claimed in claim 11, wherein providing an active balancer with at least one controllable position counter weight includes providing an active balancer with a first controllable position counter weight and a second controllable position counter weight.

14. A method as claimed in claim 13, wherein said first controllable position counter weight and said second controllable position counter weight produce a net balance correction vector.

15. A method as claimed in claim 13, said method including providing a controller which controls and actuates the position of said first controllable position counter weight and the position of said second controllable position counter weight.

16. A method as claimed in claim 11, wherein providing a spring includes providing a spring comprised of an elastomer.

17. An active balancer as claimed in claim 11, wherein providing a spring includes providing a resilient flexure interface between said balancer body mass and said rotating member with said balancer body mass having a delayed oscillation which destructively interferes with said rotating member torsional vibration.

18. A method as claimed in claim 11, wherein providing a spring includes providing a spring comprised of a plurality of radiating spokes.

19. A method as claimed in claim 11, wherein said rotating member is comprised of a shaft having a shaft torsional resonance modal mass inertia, and said balancer body inertial mass is less than fifteen percent of said shaft torsional resonance modal mass inertia.

20. A method as claimed in claim 11, further comprising providing a second active balancer, said second active balancer having a second balancer body mass and a second balancer spring, mounting said second active balancer through said second balancer spring at a second position on said rotating member wherein said second balancer body mass resonates on said second balancer spring with a second balancer torsional vibration canceling frequency which cancels a torsional vibration.

21. A method as claimed in claim 11, wherein said first controllable position counter weight balance ring rotor is held with a first balance ring magnet holding force at said first balance ring rotor adjustable angular position and said second controllable position counter weight balance ring rotor is held with a second balance ring magnet holding force at said second balance ring rotor adjustable angular position.

22. A method of making a balancer for balancing a rotating member having a torsional vibration, said method including providing a balancer having a balancer body which rotates with said rotating member, said balancer body having a mass, said balancer comprised of a first controllable position counter weight balance ring rotor and a second controllable position counter weight balance ring rotor, said first controllable position counter weight balance ring rotor having a first balance ring rotor adjustable angular position relative to said balancer body and said rotating member with said first controllable position counter weight balance ring rotor moved relative to said rotating member and said balancer body with a first balance ring rotor controllable electromagnetic field, said second controllable position counter weight balance ring rotor having a second balance ring rotor adjustable angular position relative to said balancer body and said rotating member with said second controllable position counter weight balance ring rotor moved relative to said rotating member and said balancer body with a second balance ring rotor controllable electromagnetic field in order to produce a counter weight balance force for continuously balancing said rotating member, providing a mounting spring having a rotating member mounting side and a balancer body attachment side, attaching said mounting spring balancer body attachment side to said balancer wherein said balancer body mass resonates on said spring with a torsional vibration canceling frequency which cancels the torsional vibration of said rotating member when said mounting spring rotating member mounting side is mounted on said rotating member.

23. A method as claimed in claim 22, wherein providing a balancer with at least one controllable position counter weight includes providing an active balancer with an electromagnetically actuated counter weight which is electromagnetically moved around said rotating member.

24. A method as claimed in claim 22, wherein providing a balancer with at least one controllable position counter weight includes providing an active balancer with a first controllable position counter weight and a second controllable position counter weight.

25. A method as claimed in claim 24, wherein said first controllable position counter weight and said second controllable position counter weight produce a net balance correction vector.

26. A method as claimed in claim 24, said method including providing a controller which controls and actuates the position of said first controllable position counter weight and the position of said second controllable position counter weight.

27. A method as claimed in claim 22, wherein providing a mounting spring includes providing a mounting spring comprised of an elastomeric spring having a rotating member mounting inner side and a balancer body outer side.

28. A method as claimed in claim 22, wherein providing a mounting spring includes providing a resilient flexure interface between said balancer body mass and said rotating member with said balancer body mass having a delayed oscillation which destructively interferes with said rotating member torsional vibration.

29. A method as claimed in claim 22, wherein providing a mounting spring includes providing a mounting spring comprised of a plurality of radiating spokes having rotating member mounting inner ends and distal balancer body outer ends.

30. A method as claimed in claim 22, wherein said rotating member is comprised of a shaft having has a shaft torsional resonance modal mass inertia, and said balancer body inertial mass is less than fifteen percent of said shaft torsional resonance modal mass inertia.

31. A method as claimed in claim 22, wherein said first controllable position counter weight balance ring rotor is held with a first balance ring magnet holding force at said first balance ring rotor adjustable angular position and said second controllable position counter weight balance ring rotor is held with a second balance ring magnet holding force at said second balance ring rotor adjustable angular position.

32. An active balancer for dynamically balancing a rotating machine shaft having a torsional vibration resonance modal mass inertia, said active balancer having a balancer body which rotates with said rotating machine, said balancer body having a inertial mass, said balancer body inertial mass less than fifteen percent of said torsional vibration resonance modal mass inertia, said active balancer comprised of a first controllable position counter weight balance ring rotor and a second controllable position counter weight balance ring rotor, said first controllable position counter weight balance ring rotor having a first balance ring rotor adjustable angular position relative to said balancer body and said rotating machine shaft with said first controllable position counter weight balance ring rotor moved relative to said rotating machine shaft member and said balancer body with a first balance ring rotor controllable electromagnetic field, said second controllable position counter weight balance ring rotor having a second balance ring rotor adjustable angular position relative to said balancer body and said rotating machine shaft with said second controllable position counter weight balance ring rotor moved relative to said rotating machine shaft and said balancer body with a second balance ring rotor controllable electromagnetic field in order to produce an adjustable controllable counter weight balance force for continuously dynamically balancing said rotating machine, said balancer including a spring, said balancer body mounted to said rotating machine through said spring wherein said balancer body mass resonates on said spring with a torsional vibration canceling frequency.

33. An active balancing system for dynamically balancing a rotating machine shaft having at least one torsional vibration, said active balancing system comprised of a first active balancer with a first active balancer body which rotates with said shaft, said first active balancer body having a first active balancer body mass, said first active balancer comprised of a first controllable position counter weight balance ring rotor and a second controllable position counter weight balance ring rotor, said first controllable position counter weight balance ring rotor having a first balance ring rotor adjustable angular position relative to said balancer body and said rotating machine shaft with said first controllable position counter weight balance ring rotor moved relative to said rotating machine shaft and said balancer body with a first balance ring rotor controllable electromagnetic field, said second controllable position counter weight balance ring rotor having a second balance ring rotor adjustable angular position relative to said balancer body and said rotating machine shaft with said second controllable position counter weight balance ring rotor moved relative to said rotating machine shaft and said balancer body with a second balance ring rotor controllable electromagnetic field in order to produce a first active balancer adjustable controllable counter weight balance force for dynamically balancing said rotating machine, said first active balancer including a first active balancer spring, said first active balancer body mounted to said shaft through said first active balancer spring at a first shaft position, a second active balancer, said second active balancer positioned on said shaft at a second position distal from said first active balancer, said second active balancer having a second balancer body mass and a second balancer spring, said second active balancer mounted to said shaft through said second balancer spring at said second position.

34. A balancer for balancing a rotating shaft with a torsional vibration, said balancer having a balancer body which rotates with said shaft, said balancer body having a mass, said balancer comprised of a first controllable position counter weight balance ring rotor and a second controllable position counter weight balance ring rotor, said first controllable position counter weight balance ring rotor having a first balance ring rotor adjustable angular position relative to said balancer body and said rotating member with said first controllable position counter weight balance ring rotor moved relative to said rotating member and said balancer body with a first balance ring rotor controllable electromagnetic field, said second controllable position counter weight balance ring rotor having a second balance ring rotor adjustable angular position relative to said balancer body and said rotating member with said second controllable position counter weight balance ring rotor moved relative to said rotating member and said balancer body with a second balance ring rotor controllable electromagnetic field in order to produce an adjustable controllable counter weight balance force for balancing said rotating shaft, said balancer including a spring, said balancer body mounted to said shaft through said spring wherein said balancer body mass resonates on said spring with a torsional vibration canceling frequency which cancels the torsional vibration of said shaft.