Balancing
Unbalance is a result of uneven distribution of a rotor’s mass and causes vibration to be transmitted to the bearings and other parts of the machine during operation. Imperfect mass distribution can be due to material faults, design errors, manufacturing and assembly errors, and especially faults occurring during operation of the machine.
By reducing these vibrations, better performance and more cost-effective operation can be achieved and deterioration of the machine and ultimately fatigue failure can be avoided. This requires the rotor to be balanced by adding and/or removing mass at certain positions in a controlled manner.
Two-plane Balancing Consultant Type 7790A supports single-plane and two-plane balancing with determination of balance quality according to ISO 1940–1. The balancing process is performed as insitu balancing (field balancing) where the rotor is balanced in its own bearings and supporting structure, rather than in a balancing machine.
Trim balancing, using stored rotor data (influence coefficients) from previous balancing sessions is also supported, ensuring fast correction of small residual unbalances in cases where balancing has to be repeated.
The Balancing Consultant has an intuitive, task-oriented, graphical user interface leading you quickly through the necessary tasks for setup, measurement and reporting.
Balancing FFT / Balancing Tracking
Balancing can be based on either frequency spectra (FFT) or order spectra (order tracking). Traditional FFT-based balancing is sufficient in many measurement situations. However, in cases with unstable machinery speed and/or high frequency resolution requirements, order tracking should be used to eliminate frequency smearing and provide more accurate results.
Balancing using order tracking requires Order Analysis Type 7702. As Balancing and Order Analysis address the same kind of machinery, the hardware accessories for the two configurations are also the same.
