Blade root bolt extraction device of wind power blade

Abstract

The invention provides a blade root bolt extraction device of a wind power blade. The angular displacement measurement function of a motor encoder is used, when a detection experiment is conducted on a blade root bolt of the wind power blade, extraction of the blade root bolt to be detected is accurately calculated through angular displacement of the motor encoder, and accurate extraction of a collected sample is guaranteed. The device comprises a bracket, rotating devices arranged in the bracket at intervals, a pushing device fixedly connected to the bottom end of the bracket, a clamping device fixedly connected to the upper end of the bracket and an adapting pipe fixedly connected to the upper end of the bracket. The device has the characteristics of being reasonable in design, convenient to use and practical, improving working efficiency and safety and the like.

Description

technical field [0001] The invention relates to the field of fault detection of blade root bolts of wind power blades, in particular to a blade root bolt extraction device for wind power blades. Background technique [0002] In recent years, wind power generation equipment has increased significantly, especially wind power generators. In the troubleshooting of the bolts connecting the bearings and hubs of fan blades in different wind farms, it was found that some units had loose or even broken blade root bolts. High-strength bolts need to be inspected regularly according to the specified torque every year. During the actual implementation of this unit, the performance of the bolts that have not been inspected regularly according to the regulations is reduced. Swinging back and forth after being stressed will easily lead to the reduction of bolt torque and fatigue strength, resulting in tiny cracks. After a long period of operation, the cracks will continue to expand. When th...

AI Technical Summary

Problems solved by technology

[0003] At present, it is found that after the blade bolts are broken, all the blade root bolts of the unit need to be replaced for safety, which will cause the bolts without cracks to be discarded, resulting in waste

In order to reduce waste, the disassembled bolts are subjected to ultrasonic crack detection and other tests, and then the qualified bolts are reinstalled, and the unqualified bolts are replaced with new qualified bolts. Due to the influence of the transmission of the propeller system and the gearbox system, the force of the blade root bolts is complex. Therefore, during the disassembly and inspection and after the inspection and installation, the maintenance personnel required to conduct on-site inspection and inspection must assemble in accordance with the disassembly sequence, that is, the assembly position cannot be changed arbitrarily. Changes in the order of assembly bolts will interfere with the data of subsequent unit failure analysis, making it impossible to obtain effective measures for improvement

[0004] Most of the existing wind turbine maintenance personnel use the method of dismantling and marking the blade root bolts one by one with a marker. After ultrasonic testing is performed after marking, the marks are sometimes worn off by surface friction, which is low in work efficiency and prone to damage. Confusion, the data of test detection cannot be guaranteed accurately

[0005] During the inspection process of the blade root bolts, the bolts need to be taken repeatedly, and there is no systematic management for the numbers of different types of blade root bolts to be inspected. For the experiments of different blade root bolts to be inspected, inspection and maintenance personnel need to manually compile the numbers And archives, human work makes the work complicated and prone to errors, which has caused a great burden on the work intensity of the inspection and maintenance personnel

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