Test system for assessing freeze resistance of wind turbine blade coating, and method thereof

Abstract

The invention discloses a test system for assessing the freeze resistance of a wind turbine blade coating. The system comprises a phytotron capable of simulating icing environment and ice melting environment, a test bench is arranged in the phytotron, the test bench comprises a center rotating shaft, the center rotating shaft is fixedly connected with a plurality of connecting rods, the end portions of the connecting rods are used for installing coating test sample plates, the coating test sample plates respectively have an aerofoil profile consistent with a fan blade, and the coating test sample plates are uniformly arranged along the radial circumference with the shaft center of the center rotating shaft as a circle center; and the test system also comprises an icing sensor and a humidity sensor which are arranged on one of the coating test sample plates, and a weight sensor arranged on the center rotating shaft. The invention also provides a test method for assessing the freeze resistance of the wind turbine blade coating by using the test system. The system and the method have the advantages of low test investment cost, accurate and reliable test result, and comprehensive and real reflection of the performances of the freeze-resistant blade coating.

Description

technical field [0001] The invention relates to the technical field of wind power blades, in particular to a test system and method for evaluating the anti-freezing performance of wind power blade coatings. Background technique [0002] In the central and southern regions of my country, the temperature is low in winter, the humidity is high, and there are many icy climates such as freezing rain and rime. Wind turbine blades are prone to icing in such freezing environments. Icing of the wind turbine blades will cause the power generation of the wind turbine to decrease or even shut down. The unbalanced mass of the blades after icing will increase the fatigue damage at the bottom of the tower. The freezing problem needs to be solved urgently. In this context, extensive research has been carried out in the field of anti-icing of wind power blades at home and abroad, among which coating anti-icing coatings on the surface of wind power blades is an important technical solution. ...

AI Technical Summary

Problems solved by technology

Due to the complexity of the icing environment and blade operating conditions, there is no standard test method for the anti-icing performance of anti-icing coatings. The existing test methods mainly include testing the contact angle and rolling angle between the coating surface and water droplets under normal and low temperature conditions. , to measure the freezing delay time of a stationary paint surface, to measure the shear adhesion of a stationary paint surface to an ice layer

However, these methods basically test a certain performance of anti-icing coatings, and cannot comprehensively and truly measure the anti-freezing performance of anti-icing coatings.

In the field of aircraft icing and airworthiness, ice wind tunnels are often used for icing tests, but ice wind tunnels need to build a more complicated air supply system, the investment in equipment is huge, and the test costs are high. High accuracy, can fully and truly reflect the performance of coatings, suitable for testing systems and methods for anti-icing performance of wind turbine blade coatings

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