Balancing Of Multimass Flexible Rotors

In modern petrochemical plants and utilities the cost of down time of a compressor or turbine due to the correction of vibration problems can amount to $50,000 to $100,000 a day. It is therefore highly desirable that field service engineers be able to quickly and accurately balance a large rotating unit on the site so as to minimize down time if the unit is sHH'ering from a want of balance. \Vith the new generation of rotating equip­ ment being developed, it is often difficult and uneconomical to ship large turbo rotors back to the [lctory or to a speeializecl balnncing facility to correct the rotor Jor unbalance. This is particularly true in the case where the equipment is in au inaccessible loc::ttion sneh as an otf�horc drilling rig, or an A laskan oil pumping station. .