Method for manufacturing wind wheel blade by vacuum suction and injection

Abstract

The invention discloses a method for manufacturing wind wheel blades by vacuum suction and injection. The method comprises the following steps: laying a glass fiber layer in a specific blade mold with a surface provided with demolding cloth; laying demolding cloth, a separating film, a diversion net, and a bubble adsorption layer which is used for adsorbing bubbles and has a specific permeability on the surface of the glass fiber layer; performing sealing treatment of the specific blade mold by a sealing film; inserting a glue-injecting pipe for delivering a resin mixture into the part below the sealing film; vacuum-pumping the specific blade mold after sealing treatment so as to induce the resin mixture to be sucked and injected into the glass fiber layer under the action of vacuum negative pressure, curing to form the desired wind wheel blade. In the scheme, a certain quantity of bubbles can be adsorbed on the bubble adsorption layer, and bubbles enriched on the glass fiber layer surface are reduced; therefore, the influence of bubbles in the resin mixture on the wind wheel blade is reduced, and the quality of the wind wheel blade is effectively improved.

Description

technical field [0001] The invention relates to the technical field of manufacturing wind rotor blades, in particular to a method for manufacturing wind rotor blades by vacuum injection. Background technique [0002] Wind rotor blades are an important part of wind turbines. For the production of wind rotor blades, due to the low efficiency of the traditional hand lay-up process, the unstable quality of finished products, and high dependence on the proficiency of operators and environmental conditions, domestic and foreign wind rotor blade manufacturers generally use vacuum suction. Injection process, in which the resin mixture is injected into the glass fiber layup to make the wind rotor blade. [0003] see figure 1 , the process of making wind rotor blades by vacuum injection is generally as follows: After laying the release cloth 2 for finished product release in the specific wind rotor blade mold 1, lay the glass fiber layup 3 on the release cloth 2 as required Then, o...

AI Technical Summary

Problems solved by technology

[0004] However, the resin mixture is made by mixing the resin solution and the curing agent, so there are some air bubbles in the resin mixture, so that during the infiltration process, the air bubbles will enter the glass fiber layup with the resin mixture

And because the bubbles have the characteristics of floating, the surface of the glass fiber layer will be enriched with bubbles, so that a bubble layer will be formed on the surface of the wind rotor blade, which will affect the quality of the wind rotor blade.

Images