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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
First Claim
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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.

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