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Hélices propulsoras de composite para buques de la armada y mercantes


Oferta Tecnológica
Una empresa holandesa que diseña y fabrica composites ha desarrollado una tecnología de producción de hélices de composite para propulsión de barcos. La empresa ha desarrollado un software con interfaz especial para analizar y optimizar el rendimiento hidrodinámico y estructural de las hélices. El prototipo del sistema de propulsión ha sido probado por la Armada Real de Holanda. Se buscan socios con el fin de establecer acuerdos de cooperación técnica para continuar con el desarrollo y comercialización con asistencia técnica.


Large composite propeller blades for both navy and commercial vessels
A leading Dutch composites design and manufacturing company developed a manufacturing technology for composite blades for ship propulsion. Specialized computer interface software was developed to analyse and optimize the blades for both hydrodynamic and structural performance. A prototype of the propeller has been tested favourably by the Royal Dutch Navy. The company is interested in technical cooperation to further develop the technology and in commercial agreements with technical assistance.
Ship propeller design involves a number of competing variables, including blade surface area, the rake and pitch of the blades in relation to the propeller centreline, the risk of cavitation and the overall diameter. All of these factors affect a vessels top speed, fuel efficiency and handling.

The developed concept consists of a full composite blade attached to a bronze foot which is mounted on a bronze hub. Finite element analysis was performed to determine the stresses in the blade foot and the blades under operational load conditions. A modal analysis for vibration response was also conducted. Because the composite blades tended to deform more under loads than metal blades, the deformed geometry was used in the analysis of the propeller´s hydrodynamic performance.

This analysis was done in co-operation with a Dutch institute specialized in maritime research. An important outcome of this analysis was that the blade tips change pitch as they bend under dynamic loads. This condition could delay the onset of cavitation and lead to quieter operation. In addition the pitch change also has the potential to increase ship fuel efficiency which could
lead to substantial savings in large oceangoing vessels.

Based on the models and initial lab tests a blade structural design was selected that comprises a glass fibre/epoxy core and carbon fibre/epoxy skins, with dry fabrics that account for the
stresses at the root. The core and fabrics were assembled with an epoxy resin as matrix. A polyurethane coating, applied to the blades, provides impact protection and reduces algae growth.

Further specs are:
- Diameter propeller 2,5 mtr/1,4 MegaWatt
- Full composite blades
- Materials carbon, glass, and epoxy resin produce a strong replacement for nickel/ aluminium/bronze metal, the current propeller standard.
- Specific reinforcing techniques strengthen the highly stressed region at the highly loaded propeller blade root area.

In order to further develop and implement the proposed technology, the company is looking for (defence) industry partners (build, maintenance, repair and overhaul of ships and drivelines) within the frame of a technical cooperation agreement or a commercial agreement with technical assistance.
Advantages and Innovations:
In comparison to prevailing techniques, the lower weight reduces the electro-magnetic signature and there is no risk of corrosion, all with the potential to reduce fuel consumption (propulsion driveline) costs on the one hand and increase the lifespan n the other hand (naval).
Stage of Development:
Field tested/evaluated
Secret know-how

Partner sought

Type and Role of Partner Sought:
- Type of partner sought: Industry, defence
- Specific area of activity of the partner: Propulsion (driveline)ship building, maintenance, repair and overhaul
commercial and navy ships
- Task to be performed by the partner sought: further development and implementation of the proposed technology; in case of a commercial agreement the Dutch partner will provide technical consultancy.


Type and Size of Client:
Industry 250-499
Already Engaged in Trans-National Cooperation:
Languages Spoken:


Technology Keywords:
02007005 Composite materials
02009005 Construcción de barcos
02007019 Lightweight materials
02009006 Traction/Propulsion Systems