01/03/  · If you are using tools calibrated in inches, take the millimeter specification for the rotor and divide it by 25.4, this will give you the measurement in inches. For example, this rotor

rotor is said to be flexible. A rigid rotor can be balanced by making cor­ rections in any two arbitrarily selected i rnr u i A £ Fig. 3. Static balance, couple unbalance planes. I he balancing procedure tor * flexible rotors is more complicated, because of the elastic deflections of the rotor. Fig. 4. Dynamic unbalance O

The principle of performing field balancing is to make (usually tempo­ rary) alterations to the mass distribu­ tion of the rotor, by adding trial masses, and to measure the resulting phase and magnitude of bearing vibra­ tion. The effects of these trial correc­ tions enable the amount and position of the required correction mass to be determined.

A flexible rotor (8) balancing (10) procedure uses test weights provided by actuators (16) driven in accordance with modal balance procedures at different 

Low Speed Balancing and Dynamic Rotor Balancing. Low speed balancing corrects the imbalance created when a machine' center of rotation differs from the 

The procedure to acquire the required data and balance the rotor is as follows: 1) Vary the motor speed, recording the unbalance at each speed. This measurement is not needed for balancing the rotor, but will be used later as a check on calculations. 7) Using the equations described in section 6.5 (calculations) determine the 2 masses required

period of any systematic balancing procedure using more than two balancing planes. The first flexible rotors of significance to be built were steam turbine.

Rotor Blade Static Balance - Art or Science? 3 Dynamic balancing is always the final solution Static balancing procedures do not replace dynamic tuning procedures, but augment the dynamic tuning process. Dynamic balancing accommodates any cause for imbalance in the entire rotating system. Dynamic tuning is expensive to perform

Abstract: This review is dedicated to balancing methods that are used to solve the rotor-balancing problem. To ensure a stable operation 

To improve the balance condition of most high speed flexible rotors, the following procedure is generally followed: 1. Balance the bare shaft without added components a. Assure that any keyways are fitted with half keys in accordance with ISO 8821 unless two keys are located at the same axial position and are 180⁰ apart 2.

Balance grades are separated by a factor of 2.5 (G1.0 to G2.5 to G6.3, etc.). ISO Standard 1940 on “Balance Quality Requirements on Rigid Rotors” defines acceptable balance quality grades