Method for correcting deviation of blades of wind generating set

Abstract

The invention discloses a method for correcting deviation of blades of a wind generating set. The method solves the problems of high cost, poor safety and long deviation correcting time in the prior art; and the method can save the economic cost, labor cost and maintenance time, is high in operability of wind field operation and maintenance, and can effectively avoid set accidents. According to the technical scheme, the blades are adjusted to be in a feathering state; the wind generating set is halted, and a high-speed shaft brake disc is operated to enable the blades to be subjected to deviation correcting to be vertically downward; a wind wheel is locked through a wind wheel locking disc, and pre-tightening force of studs of circumferential connection between the blades to be subjected to deviation correcting and variable pitch bearings is unloaded; each circumference is divided into four areas, a set number of nuts are detached from each area, and remaining nuts are tightened; and avariable pitch manual operation box is operated to enable the blades to be repeatedly subjected to variable pitch feathering for multiple times until the centers of the studs coincide with the centers of connecting holes in the variable pitch bearings.

Description

technical field [0001] The invention relates to the field of wind power applications, in particular to a method for correcting the blade deflection of a wind power generating set. Background technique [0002] With the rapid development of wind power technology and the increase of installed capacity year by year, there are more and more problems in the connection between blades and pitch bearings, seriously affecting the safe operation of wind turbines, and gradually attracting great attention from various complete machine manufacturers. Blades and pitch bearings are the key components of wind turbines, and the components are connected by high-strength studs. Therefore, the loading of high-strength studs plays a vital role in the safe and reliable operation of the unit. When the blade is assembled with the pitch bearing, due to the large connection diameter and the large number of mounting holes, and the use of a crane to align the blade to the pitch bearing, many factors ma...

AI Technical Summary

Problems solved by technology

When the blade is assembled with the pitch bearing, due to the large connection diameter and the large number of mounting holes, and the use of a crane to align the blade to the pitch bearing, many factors may cause the center alignment of the connection holes between the blade and the pitch bearing. The connecting studs are stuck on the wall of the pitch bearing hole, causing the bolts to be sheared, which affects the reliability of the connection and the safety of the unit

[0003] The connecting studs between blades and pitch bearings are thin rods in the middle, and the installation pre-tightening force is smaller than that of normal studs. If the inspection is not timely, the pre-tightening force of the studs will become smaller, causing the blades to deviate from the pitch bearing, and the studs will be stuck on the wall of the pitch bearing hole. It will fall, and the wind wheel will be unbalanced, which will cause serious accidents such as the unit falling down

[0004] Due to the particularity of the connection position between the blade and the pitch bearing, to correct the blade so that the connecting holes of the two connecting parts are centered, a crane must be used to drag the blade to correct the deviation. more difficult to implement

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