Connection structure of lengthened wind power blade root and installation method of lengthened wind power blade

Abstract

The invention discloses a connecting structure in a root of a lengthened wind power blade. The connecting structure comprises a blade root connecting cylinder, axial mounting holes, radial mounting holes, double-thread screws and crossed nuts, wherein the axial mounting holes are uniformly and alternately formed in one end plane of the blade root connecting cylinder, the radial mounting holes are circumferentially formed in the wall of the blade root connecting cylinder, the double-thread screws are arranged in the axial mounting holes and the crossed nuts are arranged in the radial mounting holes; the axial mounting holes correspond to the radial mounting holes and are connected with the radial mounting holes to form T-shaped mounting holes, one ends of the double-thread screws protrude into the radial mounting holes to be fastened with the crossed nuts, and the other ends of the double-thread screws protrude out the end plane of the blade root connecting cylinder; the adjacent radial mounting holes are alternately formed in the wall of the blade root connecting cylinder, axial distance from a central axis of every two adjacent radial mounting holes and the end plane of the blade root connecting cylinder is different, and the lengths of the double-thread screws protruding out the blade root connecting cylinder are equal. Under the condition that the number of the radial mounting holes is increased, blade bodies among the radial mounting holes are not likely to be damaged. The invention further provides a mounting method of the lengthened wind power blade.

Description

technical field [0001] The invention relates to the technical field of installation of lengthened wind power generators, in particular to a connection structure of the roots of lengthened wind power blades and a method for installing the lengthened wind power blades. Background technique [0002] At present, the connection of wind power blades is mostly used to drill holes in the root of the blade and install bolt assemblies for connection in the holes. The blade root of the wind power blade is in the shape of a cylinder. Then drill the axial installation hole for connection from the end face of the blade root along the axial direction of the blade root, install the cross type nut into the radial installation hole, and install the axial connecting screw in the axial installation hole And fasten it with the cross nut, and connect the connecting screw rod to the hub of the complete machine of the wind power blade to complete the connection and installation of the wind power bl...

AI Technical Summary

Problems solved by technology

[0003] The invention aims at the problems in the prior art that the blade body between the radial installation holes is prone to damage after the number of radial installation holes increases, resulting in short service life of the blades, increased maintenance frequency and cost of the blades, and reduced power generation efficiency of wind turbines. A connection structure for lengthening the root of wind power blades is proposed. When the number of radial mounting holes increases, the blade body between the radial mounting holes is not easy to be damaged, which improves the bearing capacity of the blade root and prolongs the service life of the blade. blade maintenance frequency

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