High-altitude dismantling method of offshore wind power impeller and gravity center adjustable type tool used for dismantling method of offshore wind power impeller

Abstract

The invention provides a high-altitude dismantling method of an offshore wind power impeller and a gravity center adjustable type tool used for the dismantling method of the offshore wind power impeller. The high-altitude dismantling method comprises the following steps that (1), a blade tip and a blade root of a fractured fan blade are separated, and the blade tip is hoisted away by adopting a main crane; (2) the blade root is removed by adopting the main crane; (3) the main crane is adopted to hoist the gravity center adjustable type tool to replace the original fan blade, wherein the weightand the gravity center position of the gravity center adjustable tool are the same as those of the fan blade, and the gravity center adjustable type tool is mounted on the impeller; (4), the main crane is utilized to mount a blade root hoisting belt on two pieces of upward fan blades, and an auxiliary crane is utilized to be connected with a hoisting point on the gravity center adjustable type tool; and (5), a bolt between a hub and a power generator is removed, so that the hub is separated from the power generator, the impeller can be dismantled, the main crane and the auxiliary crane work simultaneously, an overturning action of the impeller is completed, and finally the impeller is slowly placed at a preset position. According to the high-altitude dismantling method, two hoisting points are used, dismantling and overturning of the impeller can be achieved, a crane ship does not need to be arranged additionally, and the repair cost is lowered.

Description

technical field [0001] The invention relates to a dismantling method of a wind power impeller, in particular to a high-altitude dismantling method of an offshore wind power impeller and a center-of-gravity-adjustable frock for the disassembly method. Background technique [0002] The offshore wind power industry has become an important new field for the development of clean energy in my country; the height of the center of the impeller of the offshore wind turbine from the sea level is relatively high, which is about 90m, and the length of the blade is relatively long, which is about 60m; If the blade is broken, the impeller needs to be removed as a whole, so that the fan can be repaired and the damaged parts can be replaced; the location and angle of the broken offshore fan blade are random. Difficulty in dismantling the impeller. [0003] At present, after the blade of an onshore wind turbine breaks, the way to remove the impeller is as follows: figure 1 As shown, 1a is a ...

AI Technical Summary

Problems solved by technology

[0005] 1. Three cranes are needed to turn over the impeller after dismantling. If this method is used to disassemble the impeller of the offshore fan, an additional lifting vessel is required, which increases the maintenance cost of the fan.

[0006] 2. To install lifting lugs on the hub, construction personnel need to stand on the outside of the impeller to operate; in addition, setting lifting lugs on the blades also requires high-altitude operations; the existing technology has a large amount of high-altitude operations, and there are safety hazards in offshore use

[0007] 3. Due to the influence of waves in offshore operations, the lifting point of the auxiliary crane is unstable during the lifting process, which may easily cause secondary accidents

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