NGI provides rotor vibration and imbalance diagnostic services to identify the source of abnormal vibration and restore stable turbine operation. Work is performed to evaluate rotor behavior, detect imbalance conditions, and identify mechanical or aerodynamic issues affecting performance. Where imbalance is identified, blade balancing is performed as a corrective solution to counter vibration and restore proper rotor balance.
Using a combination of vibration analysis, system data review, and field verification, NGI isolates vibration sources across the rotor, drivetrain, and structural components. The objective is to identify root causes accurately and implement corrective actions that reduce mechanical stress, eliminate vibration-related issues, and prevent repeat failures.
NGI technicians perform on-site vibration analysis testing to evaluate rotor behavior and identify imbalance conditions. Testing is conducted through a series of controlled runs, including pitch adjustments and the addition of balance weights within the blades.
Specialized sensors are utilized to detect specific types of vibration and imbalance, capturing detailed response data from the turbine and tower. This data is recorded and analyzed in coordination with NGI engineering to accurately determine imbalance conditions and define the required corrective actions.
Assessment of rotor balance condition based on vibration behavior, operational data, and field observations. Identifies imbalance caused by blade mass variation, contamination, surface damage, or uneven loading across the rotor.
Inspection of blade pitch response, position accuracy, and system behavior during operation.
Identifies uneven pitch control, blade tracking issues, or aerodynamic imbalance affecting rotor stability.
Verification of turbine alignment with wind direction and evaluation of aerodynamic loading conditions. Identifies yaw misalignment or uneven wind loading contributing to cyclic vibration.
Assessment of how vibration affects tower, nacelle, and structural components.
Identifies resonance conditions, excessive movement, or structural stress caused by sustained vibration.
Based on findings, NGI supports corrective actions including alignment, balancing, component repair, or system adjustments required to reduce vibration and restore stability.
All findings, data, and recommendations are documented, providing clear insight into vibration sources and required next steps.
NGI provides blade balancing services when dynamic testing and vibration analysis identify rotor imbalance requiring corrective action. Blade balancing is performed based on engineering calculations and/or manufacturer specifications to restore proper mass distribution across the rotor.
Corrective balancing methods are selected based on turbine model, blade design, and imbalance severity. NGI works in coordination with engineering to ensure that all adjustments are calculated, verified, and executed within required tolerances.
Application of calculated epoxy-based weights to specific locations within the blade to correct imbalance.
Installation of lead weights inside the blade at defined positions to achieve proper mass correction.
Injection of resin material to adjust internal mass distribution and stabilize imbalance conditions.
Filling of designated blade compartments to achieve required weight distribution based on engineering calculations.
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