×

Method of and system for balancing a rotor

  • US 4,489,606 A
  • Filed: 07/26/1982
  • Issued: 12/25/1984
  • Est. Priority Date: 07/27/1981
  • Status: Expired due to Term
First Claim
Patent Images

1. A rotor balancing method for reducing excessive amplitude of unbalanced vibration occuring in a rotor of a rotary machine, the method comprising the steps of:

  • actually measuring an unbalance vibration amplitude of said rotor;

    judging whether a desired level is exceeded by the actually measured unbalance vibration amplitude;

    selecting at least one of a plurality of correction plane combinations each having at least any two of the correction planes preset on said rotor, based on said actually measured vibration amplitude, when said desired level is exceeded by said actually measured unbalance vibration amplitude;

    computing a correction mass to be added to said rotor, using one of a plurality of influence coefficients preset to the respective correction plane combinations, corresponding to said at least one selected correction plane combination;

    computing on an assumption that said correction mass is added to said rotor, estimated residual vibration amplitudes and root mean squares of said estimated residual vibration amplitude;

    comparing combinations of maximum values of said estimated residual vibration amplitudes and said root mean squares of said estimated residual vibration amplitudes corresponding respectively to correction plane position combinations with said desired level; and

    selecting an appropriate correction plane position combination corresponding to at least one of said combinations of the maximum values and the root mean squares of said estimated residual vibration amplitudes which is below said desired level, the step of selecting said correction plane position combination includes selecting an optimum correction plane position combination corresponding to one of at least two combinations of the maximum value and the root means squares which has the minimum amplitude, so that an optimum correction mass is formed by said optimum correction plane position combination ans said correction mass; and

    attaching said correction mass to said rotor.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×