Taking out and replacing method for fractured bolt of megawatt-level wind driven generator set blades

Abstract

The invention discloses a taking out and replacing method for a fractured bolt of megawatt-level wind driven generator set blades. The taking out and replacing method comprises the steps that S1, the type of the bolt is distinguished, specifically, the type of the fractured bolt is determined by inspecting the fractured bolt on the blades, and a bolt hole where the fractured bolt is located is moved to a blade bolt observation hole in a main machine wheel hub; S2, the position of a cross nut is determined, specifically, the length of a two-start screw on the fractured bolt is determined according to the type of the fractured bolt, the position area of the cross nut burred in the blades is measured according to the length and the installation position of the two-start screw, and the position of the cross nut is determined; S3, the cross nut is taken out, specifically, the fractured two-start screw is taken out, and then the cross nut is directly knocked out; and S4, a new blade bolt is replaced finally. The taking out and replacing method for the fractured bolt of the megawatt-level wind driven generator set blades has the advantages of being simple in principle, easy to operate, high in operability, capable of improving the operation efficiency and relieving the labor intensity and the like.

Description

technical field [0001] The invention mainly relates to the field of assembly of wind power generators, in particular to a method for taking out and replacing broken bolts of blades of megawatt wind power generators. Background technique [0002] In recent years, the domestic wind power industry has developed rapidly, and megawatt-level wind power generating units have spread all over the country. With the prolongation of the running time of wind turbines and the growth of installed capacity, all equipment and components of the wind turbines are faulty or damaged, and the bolts of the blades of megawatt-scale wind turbines also break from time to time. [0003] Such as figure 1 As shown, the connection between the blade 1 of the wind power generator and the hub 4 of the main engine is completed by multiple sets of high-strength bolt groups, and the multiple sets of high-strength bolt groups are evenly distributed along the root pitch circle of the blade 1 root. The blade bo...

AI Technical Summary

Problems solved by technology

[0006] (1) consume a lot of manpower, material resources and financial resources;

[0007] (2) The project takes a long time and is greatly affected by weather factors;

[0008] (3) The time-consuming project reduces the availability of wind turbines and damages the interests of customers;

[0009] (4) The complex process will also bring more security risks

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