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RBalance Rotor Balancing Procedure

 

N.B. It is important that rotor balancing be performed by an experienced rotating machinery specialist.

The following describes the procedure for performing single or two plane balancing. The data is used in a balancing program for calculating the required balancing weight and position for attaching a balancing mass to the rotor. The vibration magnitude and phase angle must be obtained using a suitable balancing machine. For recommended balancing limits, see international standard: ISO-3945.

Single Plane Balancing Procedure

1.

Run the machine and record the initial rotor vibration and phase angle.

2.

Stop the machine and firmly attach a small Trial Weight to the rotor. Record the Trial Weigh mass and position. (Ensure that the Trial Weight is firmly attached to the rotor. It is a serious safety risk if the Trial Weight is not firmly attached and flies off while running the machine).

3.

Run the machine and record the new rotor vibration and phase angle.

4.

Stop the machine and remove the Trial Weight.

5.

Input the data obtained from the 3 steps above in a single plane balancing program to calculate the required balancing weight and position.

6.

Firmly attach a balancing weight of the required mass to the calculated position on the rotor.

7.

Run the machine and re-measure vibration. If required, perform a trim balance.
 

Two Plane Balancing Procedure

1.

Measure and record the initial rotor vibration and phase angle on both bearings.

2.

Stop the machine and attach a small Trial Weight to plane 1 of the rotor. Record the trial weigh mass and position. (Ensure that the Trial Weight is firmly attached to the rotor. It is a serious safety risk if the Trial Weight is not firmly attached and flies off while running the machine).

3.

Run the machine and record the new rotor vibration and phase angle on both bearings.

4.

Stop the machine and remove the Trial Weight from plane 1. Attach a small Trial Weight to plane 2 of the rotor. Record the trial weigh mass and position. (Ensure that the Trial Weight is firmly attached to the rotor. It is a serious safety risk if the Trial Weight is not firmly attached and flies off while running the machine).

5.

Run the machine and record the new rotor vibration and phase angle on both bearings.

6.

Stop the machine and remove the Trial Weight from plane 2.

7.

Input the data obtained from the 3 steps above in a two plane balancing program to calculate the required balancing weights and positions.

8.

Firmly attach balancing weights of the required mass to the calculated positions on planes 1 and 2 of the rotor. (Ensure that the Balancing weights are firmly attached to the rotor. It is a serious safety risk if a Balancing Weight is not firmly attached and flies off while running the machine).

9.

Run the machine and re-measure vibration. If required, perform a trim balance.