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Moment Weighing Testing
Moment weighing is a technique for locating an object’s center of gravity.
Stacking Sequence Optimization
A common application for moment weighing is optimization of turbine blade loading sequence (stacking order).
During moment weighing, blade weight and the center of gravity location (CoG) are measured and analyzed with a proprietary software package to determine the optimum blade stacking position (loading chart) that minimizes blade row unbalance.
Blades need to work under a high-load, high-speed, and high-vibration environment, which directly affects the start-stop performance, working reliability, efficiency, and operating costs for a business. Turbine blades have the characteristics of complex shapes and high precision requirements.
In order to meet the technological requirements, the blades need to be manually polished, so that the mass moment of each blade after assembly is unique, providing an intentional residual imbalance in the rotating body.
To match the blade specifications for partnering businesses, SimuTech Group has moment weighed turbine blades ranging in length from 1 to 60 inches, spanning multiple industries and application categories.
Moment Weighing Testing Services:
- Measure the mass and CG location of parts (provide center of mass measurements and center of gravity measurements
- Optimize stacking order (turbine blade sequencing) to minimize imbalance
- Rapid response – no special fixturing required
- Measurements taken on-site or in lab
- Measure bucket moment weight
- Measure blade moment
Introduction to the “Big 3” of Moment Weights
In short, the moment or “moment weight” of a turbine blade is merely the product of its weight times the distance from a reference axis to its CG.
Commonalities exist across all turbine blades, regardless of application or industry. In fact, there are three moment weights for any turbine blade: radial, transverse, and axial.
The transverse and axial moment weight are invariably measured relative to the central (“datum” or “stacking”) axis of the corresponding blade.
Radial moment weight is typically characterized relative to the center of rotation of the turbine rotor.
However, contingent on the blade-type, may instead be defined in relation to the Z-plane at the root of the blade (the segment of the propeller blade that fits into the hub).
Contact for Moment Weighing Testing
Our Commitment to Quality
SimuTech Group is committed to offering the highest quality professional service at extremely competitive rates as well as safety and compliance with OSHA and other safety standards imposed by regulating bodies including the standards developed by the customer.
All representatives of SimuTech Group working in the field carry current first aid, AED, and CPR credentials and are professionally trained for working at heights and working in confined spaces.