A device for improving the stiffness of large wind turbine blades

Abstract

The invention relates to a device for improving stiffness of a large wind turbine blade. The device comprises a blade displacement monitoring system, a blade stress monitoring system and a stiffness performance adjustment system which are mounted on the large wind turbine blade, the blade displacement monitoring system comprises a transmitting terminal, a receiving terminal, a computational integration module and an imaging surface, the stiffness performance adjustment system comprises a pull system, a steel wire, an anchor plate, a tension sensor, a fixed bolt and a signal transmission module, and the blade stress monitoring system is composed of a plurality of stress sensors and a data integration module. The device has the advantages that pre-stress can be applied to the blade, the vibration amplitude of the large wind turbine blade is suppressed, the phenomenon of adverse vibration generated under a natural wind environment or seismic action is relieved, meanwhile, the whole safetyand working reliability of the blade are ensured, and normal operation of wind turbine facilities is facilitated.

Description

technical field [0001] The invention relates to the technical field of wind engineering, in particular to a device for improving the stiffness of blades of large wind turbines. Background technique [0002] Wind turbine blades grow softly and are prone to various types of vibrations in natural wind environments or earthquakes. Vibrations such as blade tip waving can easily cause fatigue in key parts such as the blade roots, which in turn affects the service life of the overall wind turbine system and causes severe damage. security risks. Traditional wind turbine blade vibration control mostly adopts aerodynamic or mechanical measures, but such passive treatment is often difficult to apply to the complex and changeable boundary layer real wind environment and earthquake action. Therefore, it is especially important to propose equipment that can effectively and directly improve the stiffness performance of blades for the vibration suppression and safe operation of structural ...

AI Technical Summary

Problems solved by technology

[0002] Wind turbine blades grow softly and are prone to various types of vibrations in natural wind environments or earthquakes. Vibrations such as blade tip waving can easily cause fatigue in key parts such as the blade roots, which in turn affects the service life of the overall wind turbine system and causes severe damage. security risks

Traditional wind turbine blade vibration control mostly adopts aerodynamic or mechanical measures, but such passive treatment is often difficult to apply to the complex and changeable boundary layer real wind environment and earthquake action

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