External reinforcement method of blade and blade used for wind power generating set

Abstract

The invention provides an external reinforcing method for a blade and the blade for a wind generating set. The method can include the steps that reinforced cloth is laid at the position to be reinforced of the blade layer by layer; a flexible plate covers the outer side of the reinforced cloth; a vacuum system is arranged on the outer side of the flexible plate; vacuumizing is conducted, and resinis poured after being vacuumized; the resin is solidified and molded; and the vacuum system and the flexible plate are removed. According to the external reinforcing method, a mould when the resin ispoured is simulated by using the flexible plate, the resin is poured under a vacuum state and cured, the external reinforced surface is shaped, and the problem that the external reinforced surface isnot shaped due to the facts that obvious steps exist between staggered layers of cloth layers and the reinforced cloth is leveled manually is solved.

Description

technical field [0001] The present invention relates to a blade external reinforcement method and a blade used for a wind power generating set, more specifically, the present invention relates to an external reinforcement method of a blade capable of making the external reinforcement profile of the blade conform to the shape and the blade used for Blades of a wind turbine. Background technique [0002] The blades of wind turbines are the key components of wind turbines. Typically, a blade is formed by gluing two half shells together. Moreover, the outer surface of the blade bonding joint is usually reinforced to ensure that the blade does not crack. [0003] figure 1 is a flowchart illustrating a method of external reinforcement of a blade according to the prior art, figure 2 It is a schematic diagram of the arrangement of various layers in the external reinforcement method of the blade according to the prior art. [0004] The blade external reinforcement method accord...

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Problems solved by technology

[0005] However, there is the problem that the external reinforcement profile of the blade does not conform to the shape of the blade external reinforcement method as described above.

Specifically, according to the blade external reinforcement method in the prior art, the shape of the cured resin is the same as that of the laid reinforcement cloth, and there are obvious steps in the cloth layers of the reinforcement cloth, which leads to the formation of external reinforcement. There are obvious steps in the strengthening layer, which will lead to non-conformity of the reinforced profile (that is, the shape deviation between the reinforced profile and the design shape of the blade), which will cause the aerodynamic performance of the blade to not match the design value

In addition, according to the external reinforcement method of blades in the prior art, the method of manually driving out the air bubbles is used to flatten the reinforcement cloth, which also leads to the non-conformity of the reinforcement surface.

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