Analysis of Coupling Balance Factors

CausesCouplingThe factors of rotor unbalance are nothing more than rotor shape asymmetry, manufacturing and installation errors, and material unevenness. *The item should be solved by calculating the balance quality during the design stage.The latter two can only be achieved by determining the size and orientation of the rotor imbalance on the balancing machine or by discovering the field balance, and then determining the radius and orientation of the balance mass, and adding or subtracting the balance mass to balance.

     The factors affecting the balance of uncorrected couplings are as follows:
           1. The imbalance caused by the manufacturing tolerances specified in the design specifications of the main parts of the coupling (semi-coupling, etc.).
           2. The unbalance caused by the eccentricity of the centering surface of the coupling and the shaft (the cylindricity of the shaft hole and its coaxiality with the outer edge).
           3. The gap between matching parts in the coupling.
           4. Unbalance caused by uneven or unsymmetrical distribution of accessories (threaded connections, keys, shaft end pressure plates) in the coupling.
           5. Unbalance caused by uneven material or uneven wear of each part of the coupling.

      The following factors affect the possible unbalance of the coupling after balance correction:
            1. Balance the tolerance specified in the calibration specification.
            2. Balance the errors of correction equipment, instruments and mandrel components for correction.
            3. The error caused when the coupling is reassembled and installed on the two connected shafts after balance correction.
           4. Obvious changes in the unbalanced state of the rotor caused by temperature changes.