A blade locking device applied to wind turbines

Abstract

The invention discloses a blade locking device applied to a wind electricity typhoon unit. The blade locking device applied to the wind electricity typhoon unit includes a locking plate and an electric locking mechanism, wherein the locking plate is installed between a blade bearing of the wind electricity typhoon unit and blade roots of the wind electricity typhoon unit, the main body of the locking plate is in a ring shape, a protrusion part extending to the direction of the circle center is arranged on the inner edge of the ring-shaped locking plate, the protrusion part is provided with a shaft sleeve, the electric locking mechanism includes a guide seat mounted on a hub web plate of the wind electricity typhoon unit and an electric push rod arranged in the guide seat, a guide hole is formed in the top end of the guide seat, and a fitting pin connected with the electric push rod in a drive mode is arranged in the guide hole; and when the blades are locked, the electric push rod pushes the fitting pin into the shaft sleeve of the locking plate. The blade locking form of the blade locking device is used for the wind electricity typhoon unit and capable of achieving higher lockingstrength, and the blade locking purpose is achieved effectively, safely and quickly under the complex and severe wind regime condition.

Description

technical field [0001] The invention relates to the technical field of blade locking, in particular to a blade locking device applied to a fan unit of a wind power station. Background technique [0002] The existing domestic blade locking devices are usually in the form of manual locking or hydraulic locking, which are fixed by bolts or locking pins, and the blade bearings or blade roots are directly connected to the hub. [0003] Commonly used structure 1: the blade locking device is installed on the hub, the locking pin is connected to the main body of the locking device through a fixing bolt, and braked by the engagement of the locking pin and the blade bearing gear. Disadvantages: The locking angle is not fixed through the engagement of the locking pin and the blade bearing gear. Misoperation may also occur when the blade rotation angle is inaccurate. The diameter of the locking pin is limited by the pitch of the teeth, which is difficult to reach under typhoon condition...

AI Technical Summary

Problems solved by technology

Disadvantages: The locking angle is not fixed through the engagement of the locking pin and the blade bearing gear. Misoperation may also occur when the blade rotation angle is inaccurate. The diameter of the locking pin is limited by the pitch of the teeth, which is difficult to reach under typhoon conditions. Locking Strength Requirements

Disadvantages: The blade locking device is fixed on the blade root bolt, and the blade and the hub are fixed by the bolt. It is necessary to lengthen the blade root bolt and cut a groove at the corresponding position of the hub

For typhoon units, the working conditions are more complicated and harsh. Once the traditional locking method fails, it will cause damage to the important structures of the fan such as the bearing body or the blade root, and the locking needs to be manually disassembled repeatedly. Fixing bolts, when the bolts are loose or manually operated, the locking pins are easy to fall off and cause damage to the bearing teeth or blade roots. Under special working conditions, once the locking operation is wrong, it is easy to pose a threat to the safety of the manual locking personnel.

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