Raptor Scientific’s single-axis moment weight scales are 10x more accurate than knife-edge pivot. They offer blade matching to improve turbine or fan balancing and reduce vibrations. From repairing turbines to manufacturing blades, our MW series of moment weight scales can dramatically reduce your costs through smaller batch sizes and shorter cycle times because of their world-class measurement accuracy and repeatability.
Moment weighing scales measure the moment weight of a blade (see definition of moment weight). These measurements facilitate blade matching to improve turbine or fan balancing and reduce vibrations.
Measuring the moment weight of blades is the first stage of balancing a turbine prior to stacking the rotor.
Raptor Scientific’s moment weight scales are applicable to both OEM manufacturers and maintenance and repair operations (MRO) providers in a variety of fan or turbine blade industries and applications including:
- Jet Engines – Fan and turbine blade manufacturing and turbine assembly
- Power Generation – Gas, steam, and wind turbine blade manufacturing and assembly
- Helicopters – Blade balancing for manufacturing and assembly
- Industrial fans – Fan blade balancing for manufacturing and assembly
Why Measure Moment Weight?
Balance is a major factor in determining the reliability and service life of turbine rotors used in jet engines or power plants. The task of balancing a completed rotor can be greatly simplified if the individual blades are first measured and sorted according to static unbalance moment. They are then assembled in the rotor in matched pairs, resulting in an assembly that is approximately balanced. A better balance can be obtained using our “SPACEBAL” software which compensates for hub unbalance and searches for a best-fit solution involving all the blades, rather than limiting the selection to matched pairs. If the “moment weight” of each blade in an engine is stored in a computer database, then a damaged blade can be replaced with one of identical moment, minimizing the unbalance which results from blade replacement in a repair facility.
Single Axis vs. 3 Axes
When balancing larger blades such as wide chord fan blades, the tangential, axial, and radial moments must be accounted for. To address this challenge, Raptor Scientific has developed the most repeatable and highest accuracy three-axis moment weight scale on the market. This scale provides moment measurements in all three axes. For more information on three-axis moment measurements, please visit our three-axis moment weight scale page.