Manufacturing method of megawatt-level wind turbines vane electrothermic die and thereof

Abstract

The invention discloses a megawatt-level wind turbines vane electrothermic die and a manufacturing method thereof. The vane electrothermic die has a stratified structure, and comprises a glue layer, abase layer, a heating layer, a insulation layer and an outer composite material protection layer from top to bottom, wherein the heating layer is a electrothermic element layer. The manufacturing method includes steps of: preparing a male die; brushing glue on the surface of the male die to form the glue layer; laying glass cloth on the glue layer to form the base layer; laying the heating layer on the base layer, laying the insulation layer on the heating layer after the heating layer is solidified, laying the composite material protection layer on the surface of the insulation layer, and trimming the die to obtain the vane electrothermic die. The invention has the advantages that the die has simple structure and no seepage and leakage phenomenon; die is not easy to damage when the temperature of the die is increased and has long service life, the die is equipped with a high-performance low surface load electrothermic pipe, so that reliability is greatly increased and service life of the die can be doubled; laying area of the electrothermic pipe is larger, and the heat transmission is uniform; and the manufacturing process of the die is simple and has strong operability.

Description

Technical field: [0001] The invention relates to a mold and a manufacturing method thereof, in particular to an electric heating mold for a blade of a megawatt wind turbine and a manufacturing method thereof. Background technique: [0002] The blades of megawatt-scale wind turbines are mainly made of epoxy-based resin glass fiber reinforced composite materials, and blade mold manufacturing technology has become one of the key technologies for blade manufacturing. The curing temperature of the epoxy resin-based composite material is relatively high, and its final curing needs to be cured and heated. For high-performance blades, the curing temperature of the epoxy resin needs to reach 120°C. [0003] There are two general heating methods for existing molds: water heating and oil heating. The blade mold adopts water heating, and the maximum temperature can only reach 80°C. The temperature controllability of the mold system is poor, and the heating water pipeline is prone to wat...

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Problems solved by technology

[0003] There are two general heating methods for existing molds: water heating and oil heating. The blade mold adopts water heating, and the maximum temperature can only reach 80°C. The temperature controllability of the mold system is poor, and the heating water pipeline is prone to water leakage, etc. Fault

Using heat conduction oil heating, the mold temperature can reach above 120°C, but the production cost of the mold is relatively high, especially the seal reliability of heat conduction oil is poor, and at the same time, whether it is heat conduction oil heating or water medium heating, the mold manufacturing process is relatively complicated

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