Wind Energy Turbines
Robust quality for extreme conditions

Solutions for the production of rotor blades

Metering and mixing technology for the wind power industry

The wind power industry is a steadily growing market with great potential for plant manufacturers and rotor blade producers. Besides the growing needs of onshore wind power plants, especially the offshore industry rejoices in a strong demand. For instance, off the coasts of Northern Europe, large offshore wind farms are installed that constantly produce energy due to the favorable wind conditions. The individual wind turbines, however, have to withstand extreme weather conditions – on a permanent basis.

In Germany alone, already about 15% of the energy are generated by means of wind power plants. If nothing else, the joint signature of the international climate agreement by all member states of the United Nations shows that the negotiated climate targets can only be achieved by consequently implementing the generation of renewable energy. Here, the wind energy makes a significant contribution.

Trends in rotor blade production
The development in the past years has shown that the blades of wind turbines reach new dimensions due to the requested output. With the aid of carbon fiber preforms combined with the usual glass-fiber reinforced materials, blade lengths of more than 80 meters can be achieved today. The risen demand of reinforcing fiber layers leads to an increase of the mold cycles and of the tonnage for infusion and adhesive resins as well as coating materials. This means that the systems used to supply mixed materials as well must be able to meet the growing requirements. This also applies to the particularly high quality requirements in the offshore range.

DOPAG solutions for the production of rotor blades
As leading manufacturer of metering and mixing systems for the wind power industry, DOPAG provides the comprehensive portfolio needed for the various applications for the production of rotor blades. DOPAG offer comprises infusion systems with flow rates of more than 60l/min and adhesive-resin systems being able to process masses of more than 30kg per minute. This ensures minimum mold cycle times. Due to the high resin consumption of the infusion process and to the high quality requirements of composite fiber components, resin degassing systems must be used. Here, DOPAG offers a validated system that is able to degas more than 40 liters of resin per minute.

Furthermore, for surface finishing of the turbine blades, a broad range of gel coat systems and of systems that mix anti-erosion coatings and filling compounds is offered. Moreover, DOPAG developed innovative materials e.g. for leading-edge sealing to avoid damage caused by water drops on the blade tips rotating at speeds up to 400km/h.

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Jens Bölke Director Key Market
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    The eldomix 100/600 range of systems are compact, solvent free, gear pump driven metering and mixing systems.

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