Method for locating girder of megawatt-grade wind wheel blade

Abstract

The invention discloses a method for locating a girder of a megawatt-grade wind wheel blade, comprising the following steps of: a. prefabricating a girder; b. prearranging a shell glass steel shell plate at the position 2-4m away from the tip part in a blade shell mold; c. completing rest layering structure; d. hoisting the girder, using a locating bracket and the shell glass steel shell plate tolocate the girder, and removing the locating bracket after installation is finished; and e. laying rest inner skin, wherein the rest inner skin is laid in the way of being jointed with the inner skinof the shell glass steel shell plate layer by layer, installing a vacuum system, vacuumizing, filling the blade and finally curing. The method is applicable to a blade with large torsional angle and formed by vacuum filling process. After the girder is located and installed, the locating bracket is removed, and the girder does not slide downwards when core material and the inner skin are laid, sothat the locating accuracy of the girder, as well as the strength of the blade and the product quality can be ensured.

Description

technical field [0001] The invention relates to a manufacturing technology of a wind rotor blade, in particular to a positioning method for a megawatt-level wind rotor blade girder. Background technique [0002] The existing wind rotor blades are generally a blade load-bearing structure composed of two shells and a shear web bonded together. The manufacturing steps of the shell generally include laying the outer skin, laying the bolt reinforcement cloth, placing the prefabricated girder, laying the core material, laying the inner skin, establishing a vacuum infusion system, injecting resin, and pre-curing. [0003] Due to the different types of blades, the twist angles are also different. For blades with large torsion angle changes, certain difficulties are encountered when placing and positioning the girder, mainly because the girder is easy to shift. Because after the positioning of the girder is completed, the positioning bracket needs to be removed. During the process ...

AI Technical Summary

Problems solved by technology

For blades with large torsion angle changes, certain difficulties are encountered when placing and positioning the girder, mainly because the girder is easy to shift

Because after the positioning of the girder is completed, the positioning bracket needs to be removed. During the process of laying the core material and inner skin, the girder will slide down and move, which will cause a large deviation in the positioning of the girder.