Multifunctional platform of wind power generating unit and blade disassembling method

A blade disassembling method, characterized in that it comprises:

• (1) hoisting the platform frame to both sides of the tubular tower, assembling together the two portions of the platform frame, to pass the tubular tower through the annular central hole of the platform frame;
• (2) placing a steel wire of the winding mechanism onto a hoisting point of a nacelle of the wind turbine, and running the winding mechanism to hoist the platform stably to a desired height;
• (3) pushing out the clamping plate at the front end of the tubular tower clamping mechanism, causing friction between the platform and the tubular tower, so as to prevent the rotation of the platform frame;
• (4) prior to disassembling a blade, tying sling ropes at three positions of the blade using the platform frame, with a first sling rope tied on a root side of the blade, a second sling rope tied on a tip side of the blade, and a third sling rope spaced apart from the second sling rope and closer to the blade tip side than the second sling rope;
• then placing the first sling rope and the second sling rope onto a hook of a crane ship, and each end of the third sling rope being connected to one of two sets of blade drawing mechanisms;
• and subsequently placing the blade root in place using a wind turbine maintenance crane;
• (5) loosening the hook of the crane ship, with the wind turbine maintenance crane and two sets of blade drawing mechanisms being in tension to maintain the stability of the blade;
• (6) beginning to disassemble bolts at the blade root, separating the blade root from the rotor by using the cooperation of the wind turbine maintenance crane and the blade drawing mechanisms, with the multifunctional platform being stationary and the hook of the crane ship exerting no strength;
• (7) after the blade root separating from the rotor, the crane ship slowly tensioning the second sling rope maintaining the posture of the blade, and separating the two sets of blade drawing mechanisms from the third sling rope;
• (8) retracting the tubular tower clamping mechanism on the platform frame, and lowering the multifunctional platform to the bottom of the tubular tower using the winding mechanism;
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• (9) lowering the blade slowly by using the cooperation of the wind turbine maintenance crane and the crane ship until the blade achieving a suitable height, adjusting the blade from longitudinal orientation to horizontal orientation with the crane ship catching the blade through the first and second sling ropes, then disassembling the hook of the maintenance crane and placing the blade onto a transport ship transversely using the crane ship, whereby completing the disassembling operation of the blade.