Blade lifting appliance control method and system

Abstract

The invention provides a control method and system of a blade lifting appliance. The blade lifting appliance comprises a balance weight unit, a blade clamp, a lifting rod, a first winch, a second winch, a first wind cable rod and a second wind cable rod. The control method comprises the following steps: determining that the leading-out length difference of two cable ropes exceeds a first length difference range in response to leading-out length information of cable ropes of a first winch and leading-out length information of cable ropes of a second winch, and controlling the first winch and the second winch to adjust the corresponding leading-out lengths of the cable ropes so as to adjust the leading-out length difference, the second inclination angle of the blade lifting appliance is changed; in response to the leading-out length information of the cable ropes of the first winch and the leading-out length information of the cable ropes of the second winch, it is determined that the leading-out length difference of the two cable ropes is kept within a first length difference range, and the first winch and the second winch are controlled to stop adjusting the corresponding leading-out lengths of the cable ropes, therefore, the flange face of the blade root of the first blade clamped by the blade clamp is parallel to the preset flange face of the hub provided with the first blade.

Description

[0001] This application is a divisional application for an invention patent application with an application date of August 26, 2020, an application number of 202010873853.1, and an invention title of "control method and system for blade spreader". technical field [0002] The present invention relates to the technical field of wind power generation. More specifically, the present invention relates to a control method and system for a blade spreader. Background technique [0003] With the continuous increase of the single-unit capacity of wind turbines, the blade size of wind turbines has also gradually increased. For example, the length of the blades of offshore wind turbines has exceeded 90 meters and the weight has exceeded 35 tons. Due to the problem of blade weight, the blades are operated in the air. It is also increasingly difficult to attach accurately to the hub. [0004] With the rapid development of my country's offshore wind power generation technology. Offshore...

AI Technical Summary

Problems solved by technology

[0005] In the existing process of hoisting blades, when the blade rotation angle is close to the required blade angle, there may be too many or insufficient angles, and it is impossible to accurately adjust the blade angle to the required angle in a short time, and it takes a long time. It takes one adjustment to get to the desired angle, and it is related to the experience of the spreader operator. The control is relatively difficult, which leads to a long installation process and poor versatility.

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