Installation method for metal flange plate at root part of wind turbine blade

Abstract

The invention belongs to the technical field of wind turbine blades, and provides an installation method for a metal flange plate at a root part of a wind turbine blade. The provided installation method for the metal flange plate at the root part of the wind turbine blade comprises the following steps of processing the metal flange plate, processing the wind turbine blade, and connecting the metal flange plate with the wind turbine blade into a whole through turnbuckles; the metal flange plate is a metal circular ring; a plurality of blind holes used for installing the turnbuckles are processed in the circumferential surface of the radial inner side of the metal flange plate, and are evenly distributed along the circumference; a plurality of through holes evenly distributed along the circumference are processed in the wind turbine blade, and each through hole communicates with a corresponding round nut through hole; a round nut matched with a double end stud is installed in each round nut through hole; and blind holes used for installing turnbuckles are processed in the end face of one side of each of the round nuts. According to the installation method provided by the invention, a safety factor of a composite material of the root part of the wind turbine blade is increased, operation difficulty is lowered, and assembly efficiency is increased.

Description

technical field [0001] The invention belongs to the technical field of wind power blades, and in particular relates to a method for installing a metal flange at the root of a wind power blade. Background technique [0002] The current installation method of the metal flange at the root of the wind turbine blade is: drilling holes on the composite material of the root of the wind turbine blade, drilling holes at the corresponding positions of the metal flange, and then permanently fixing the metal flange to the composite material of the wind turbine blade by screws . The biggest disadvantage of this traditional method is that several additional screw holes need to be drilled on the composite material, thus destroying and sacrificing the mechanical properties of some blade composite materials, and having uncertain effects on its fatigue performance and strength safety factor, especially in When the design margin of the safety factor of the wind turbine blade root is small, th...

AI Technical Summary

Problems solved by technology

[0006] The thickness of the flange is increased to 100mm. Taking the blade pitch circle diameter of 2.11m as an example, the weight has increased sharply to 500kg. It is obviously not advisable to install the flange by drilling. It is difficult to realize the drilling, and the screw connection cannot balance the weight of the flange. , unable to fix the flange plate and other problems

[0007] There are currently no relevant patents or reports on the installation method of metal flanges with large thickness and heavy weight (thickness greater than 25mm is called large thickness, and weight greater than 125kg is called large weight).

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