The only way to assess the unbalance state is to add balance correction weights at various locations and using some calculation tool such as the influence.

Furthermore, balancing of the rotor is often the stage at which a rotor is approved by the purchaser. Thus, while satisfactory running in-situ is the aim, the 

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.

It is defined as a procedure by which the mass distribution of a rotor is checked and, if necessary, adjusted in order to ensure that the vibration of the journals and/or forces on the bearings at a frequency corresponding to service speed are within specified limits (ISO 1925).

Balancing of the rotor is therefore necessary to accomplish any of the following: • Reduce vibration • Increase bearing life • Reduce structural stresses • Reduce noise • Improve the quality of the product III. CAUSES OF UNBALANCE Manufacturing processes are the major source of unbalance.

22/04/  · Rotors are a critical component used to convert electric or electromagnetic energy into rotational motion. For rotors to operate reliably, they must maintain even weight

W.C. Foiles et al. / Review: Rotor balancing 331 additional balance planes. One should note that with this technique only N linearly independent balance weight sets are used after the initial rigid rotor balance. R.E.D. Bishop and A.G. Parkinson in a discussion to Kellenberger'spaper [71] pointed out that the higher

Field balancing is the technique of balancing rotors in place as they are allowed to run at their typical operating speed with minimum disassembly. This technique can be used when the rotor is accessible to make corrections. When certain fans and blowers are enclosed and inaccessible, field balancing is not an option.

Rotor balancing is a fundamental requirement for the smooth operation of procedures usually involve commercial balancing machines based on either the 

The first step of balancing procedure is to do an initial run. The machine has to be run up the operating speed. The vibration velocity is detected. The.

The aim of balancing is to reduce the vibration level at the rotational frequency of a rotating machine. This procedure involves improving the distribution of