Innovation and new thinking are keywords for Trelleborg Sealing Solutions, which makes it important for them to support research and development projects like Corpower Ocean’s WaveBoost.

A global company within precision seals with the main focus on developing sealing systems for demanding applications, Trelleborg Sealing Solutions has been supplying parts for wind turbines since the technology began. Numerous advanced seals contribute to the effective operation of hydraulics, withstanding rigors on land and the tough conditions of offshore installations.


Now the company are facing a new era for renewable energy together with the wave power industry, meeting driven teams with a strong vision to improve their future. Their concepts challenge today’s technology and require innovative design and close collaboration, just like the wind power segment did when it began its development. By engaging with Trelleborg Sealing Solutions from an early stage, the company can do more

than just provide seals and bearings as their know-how and technical advice can help the design process. The seals are often optimised or new sealing solutions are developed when operation conditions change and new requirements are pushing the limits.

SOLVING CHALLENGING TASKS Important in any hydraulic system is the sealing configuration. Designing and specifying the right combination of sealing solutions is crucial for a reliable and long service life.

Among the company’s proven solutions you will also find seals for water hydraulics and the well-regarded Orkot®

bushings and bearings for none-lubricated & water lubricated environments.

To meet new demands, Trelleborg Sealing Solutions need to provide enhanced seal designs. With the help

of their local technical teams, they bring the knowledge from their R&D departments in to the projects.

ENERGY EFFICIENT In the WaveBoost project, seals are needed that work for long periods of time without leakage and that display low-friction to work in an energy- efficient manner. In addition, they should demonstrate low stick-slip and good sealing effect to ensure that components work consistently.

With a worldwide network, the company can support their customers no matter where their operations are situated, offering an outstandingly comprehensive sealing portfolio that provides the best in elastomer, thermoplastic, PTFE and composite technologies.

Trelleborg Sealing Solutions


The more prominent challenges within the energy industry is to prove satisfactory levels of accessibility and the reliability in the output of energy

Governments and enterprises around the world are becoming increasingly alerted to the effects of the continuing use of fossil fuels in our societies. Ocean-based energy sources including wave and tidal-based technologies, seem to be the most environmentally friendly and sustainable energy alternatives to turn to. To be successful in an increasingly competitive market, manufacturers of these technologies have to overcome a multitude of challenges.


A possible solution to achieving a basis for measuring these performance factors is the collection of performance

Learning from other industries In the automotive industry manufacturers have for many

Alkit Communications

data, diagnostic data and statistics. Since the volumes of data collected from equipment using telematics services can be very high, it is important to design a system and framework in a way that is highly scalable and efficient.

The challenge in the design of the system is to ensure high enough reliability and cost-efficiency to motivate the manufacturer and to make the system a part of knowledge-driven product development, since the source of the data collected comes from equipment in work and online. Additional benefits for the system owner is the possibility to monitor the condition of the equipment and predict maintenance intervals based on real data as a contrast to theoretical facts.


years embraced the possibilities of the connected car for using Big Data technologies for conducting intensive knowledge-driven product development. The knowledge from the automotive industry is applicable to the problems facing the offshore energy product manufacturers. Tools from the Hadoop portfolio are available and can be adopted to be part of the solution.

Knowledge driven product development Alkit Communications AB is an R&D company in ICT, based on the west coast of Sweden. The company is heavily involved in the development of a platform for knowledge-driven product development for the Volvo Car Corporation.

The company is a partner in the Ocean Era Net project “RiaSor II” and is also a partner in the Offshore West Consortium and the West Sweden SubSea network.

A pioneer in renewable energy solutions

The development of marine energy is an important factor when it comes to minimising the environmental impact. Bosch Rexroth provides solutions that use the motion energy found in waves and currents.

The global company Bosch Rexroth has several production and customising sites in Sweden. The company is a specialist at various drive technologies.


For wave energy plants hydraulics is the key factor. With it comes the possibility to transform linear oscillation into a controlled rotation (for driving a generator) efficiently and with a minimum on mechanics. In addition very high transmission ratios can be achieved in an economical way, i.e. the conversion of high forces respectively torques at the input of a wave energy converter (WEC) into considerably lower torques at high rotational speeds at the generator shaft.

The widely known force density of hydraulics allows a very compact design. The small inertial forces and good damping properties typical for hydraulics ease the handling with a highly varying power input.

The maximum forces that occur during extreme situations can be kept away from sensitive parts of the device with the help of hydraulic elements.

“At wave energy plants all over the world, Bosch Rexroth’s solutions are a contributing factor of their efficiency leading the way to sustainable energy production,” says Thomas Ekfeldt, Engineering Manager at Bosch Rexroth in the Nordic Region.

POWER PLANTS WITH MORE EFFICIENCY Bosch Rexroth also provide solutions for tidal- and continuous current power plants. These have several advantages

compared to wind turbines.

“For example it is possible without costly and comparably fault-prone power electronics and mechanical gearbox, to optimally adapt the rotor speed to the current water flow velocity. Additionally, due to a low moment of inertia and good damping properties of a hydrostatic transmission, this allows to filter load peaks close to their origin,” concludes Thomas.

By use of the distributed design of the hydraulics it is possible to reduce the number of components under water. Merely the robust rotor pump for generating hydraulic flow is placed in direct proximity of the rotor, whereas the hydro motor generator set can be installed in a machine house easier to access.

Bosch Rexroth



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