Male mold of blade mold and its modification method, adjustment method of blade pre-bending

Abstract

The invention provides a male die and a modifying method thereof of a blade die as well as a blade prebending adjusting method. Before a female die is developed, the pre-bending degree of a blade is changed by changing the blade root part of the male die. The male die modifying method comprises the following steps: chordwise dividing a to-be-modified male die, forming a blade root part and a main body part; rotating the blade root part towards or away from a tower tube for a preset angle; and splicing the main body part and the rotated blade root part, forming the modified male die. The blade prebending adjusting method comprises the following step: modifying the male die according to the male die modifying method; or when the blade is machined and manufactured, reserving a pre-cone angle at the blade root part so that after the blade is mouthed, the blade root part can be rotated towards or away from the tower tube for the pre-cone angle. The male die comprises the blade root part and the main body part which are formed by chordwise dividing, the blade root part can be rotated towards or away from the tower tube for the preset angle, and the complete male die is formed after the rotated blade root part is spliced with the main body part.

Description

technical field [0001] The invention relates to the technical field of wind turbines, in particular to blade molds and male molds thereof. Background technique [0002] The production of wind power blades is inseparable from the blade mold. In the initial stage of blade design, in order to speed up the matching progress with the whole machine, once the load matching is passed, the blade factory begins to invest a lot of money in the development of male and female molds for the blade. Once the mold is manufactured, the shape of the blade has been basically determined. Even if there are problems in the design of the blade, it cannot be modified to meet the matching requirements like machining, such as changing the shape of the design. Therefore, once the matching has passed the mold opening, the possibility of changing the shape is very small, but there is a certain risk in this method, that is, during the iterative calculation process of the finalization of the whole machine,...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a male mold of the blade mold and its modification method, and a method of adjusting blade pre-bending. Before developing the female mold, the blade root part of the male mold is modified to change the pre-bending amount of the blade, thereby solving the lack of headroom problems, greatly reducing the loss caused by the development of the blade mold in the early stage, and at the same time saving the increased cost of the re-production of the blade die

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