Low-Speed Balance

Dynamic, Dual Plane Low-Speed Rotor Balance

Rotor Dynamic Balance & Overspeed Bunker|High-Speed Balance
Why High-Speed Balance?|Low-Speed Balance

An important consideration for proper operation and maintenance of all rotating equipment is dynamic balance. Balancing is the process of improving the mass distribution of a rotating element so that it rotates smoothly around its journal axis. An unbalance can cause noise, component wear, excessive vibration, loss of efficiency, component damage, and a reduction in bearing life. A low-speed balance is acceptable for rotors which are in good mechanical condition, which operate below the first critical speed and which do not have a history of vibration problems. Combustion turbine rotors and some steam turbine HP & IP rotors are very good candidates for low-speed balance. REGENCO recommends and offers high-speed balance for problem rotors or rotors which operate above the first critical speed so that balance weights can be placed taking bending mode shapes into account.

Incoming Inspections and Balance Set-up

Visual inspection
Measure, record and evaluate run-out data
Balance set-up using multiple sized rollers
Engineering evaluation of rotor’s mechanical condition and recommendation of best balance method for existing conditions

Dynamic, Dual Plane Balance Benefits

Balance assembled turbine rotors
Balance individual CT compressor disks
Balancing done using EasyBalance® program
Well trained, experienced personnel
Engineering department for vibration analysis
Quick turn-around either on-site or in-shop
Lower cost

Balancing Criteria

Balance in accordance with ISO and API standards, typical balance grade for turbo rotors is ISO 1940 - G2.5 up to G1
Balance capability to grade G1 or less

Balance Correction Methods