Something more from the State of Art High speed balancing facility.
The roots of MAN Turbo India facility date back to November 2004. Since then we have successfully completed more then 250 no. rotors. To this list is included MAN Turbo as well as other make compressor and turbine rotors. We owe the accomplishment of this to all our customers who have extended endless support and faith towards us.
In 2004 November, MAN Turbo India installed a new state-of-the-art, high-speed balance facility, which consisted of a new control room and sturdy unique movable bunker. The bunker chamber is operated under vacuum, which allows balancing of fully bladed rotors (turbines, compressors, expanders, etc.) Our strength is our staff. Our team consists of full time balancing technicians and test engineers as well as on-site corporate training engineering staff.
Merits of High Speed Balancing.
The advantages of High speed balancing are numerous. Investing in High Speed Balancing could actually result in increased benefits from the point of view of increased output and efficiency and smooth / trouble free operation.
High Speed balancing provides the opportunity to optimize the rotor and simulate actual running conditions.
Any required corrections can be made at several balancing planes. This guarantees smooth operation of the rotor at rated speed.
Mechanical integrity of the rotor design is verified throughout the entire speed range prior to unit installation. Not performing a High Speed balancing could significantly delay project schedule and increase costs.
Sensitivity and balancing accuracy are actually increased due to High Speed balancing machine pedestal flexibility and lower mass as compared to more rigid machinery supports such as those typically used on Low Speed balancing machines.
The High Speed balancing facility can be used to verify calculated rotor response when a unit mechanical test in a casing is not practical for rotors such as the unit spare, service or re-builds.
Considering Low Speed balancing instead?
High-speed balance closely simulates actual mechanical operation conditions where rotor-bending deflection modifies the resulting forces from residual unbalance. Low speed balance only measures the sum of unbalance at two journal locations with the rotor in a rigid state. Unbalance can still exist at operating speed; especially in flexible rotors where bending of the rotor can exaggerate a specific unbalance distribution.
Our facility boasts of
Our facility uses two sizes of bearing pedestals that support rotor weights ranging from 140 kgs* to 8000 kgs* Both bearing pedestals will accommodate the use of either tilt-pad or liner type bearings. MAN Turbo India maintains a wide range of standard size (lobe type) journal bearings. If our standard bearing does not fit your specific application, a special bearing will be designed and manufactured in a reasonable time frame to meet your planned schedule. *has to be checked for the operating speed & Rotor Geometry.
High Speed balancing in a nut shell
High Speed balancing a rotor involves running a rotor to overspeed, which results in the removal of temporary static rotor bow, residual stresses and the effects of shrink fits and blade seating. Rotor components can shift as the rotor is run up to its overspeed limit causing changes in both the vibration amplitude and phase angle. Without performing a High-Speed balance, these changes would occur during the unit mechanical test or on-site. With High-Speed balance, these changes occur before balance corrections are made.
