Dellner Brakes Wind Turbine Yaw Brakes, Rotor Brakes, Bearings and Locks

Dellner Brakes produces a range of lightweight, noise-free systems for braking and gliding processes in wind turbines.

The company has developed a comprehensive range of brakes and sliding bearings with a focus on reducing noise in wind energy projects. Its products set standards for the industry and are used worldwide by leading wind power manufacturers.

Active yaw brake calipers for wind turbines

Yaw brakes hold rotating nacelles in place once rotors turn to face the wind’s direction.

Our hydraulic active brake calipers feature special epoxy resin pads and drain ports for added safety and to prevent oil from leaking onto the brake disc.

The robust, high-performance brakes can withstand temperatures ranging from -40^oC to 60^oC. We offer four active yaw brake models such as the Germanischer Lloyd (GL) certified JHS-32, which delivers a 542kN braking force.

Passive yaw sliding bearings for optimised wind turbine performance

Featuring a robust yet simple design, Dellner Brakes’ passive yaw sliding bearings optimise performance throughout a turbine’s lifecycle.

These passive bearings require little maintenance and are reliable, meaning less downtime and outages.

Additional brake discs are not needed as brake torque is applied continuously and the system slides on the yaw bearing. It operates at temperatures between -40^oC to 70^oC, and brake torque is dependent on surface pressure and friction, so variations can be built in during the design process.

The JHS-PC-1×80 weighs 16kg with a 175kN brake force. If more power is required, the 200kg JHS-PC-4×80 combines four bearings to deliver a combined braking force of 700kN.

Active rotor brakes for the renewables sector

Hydraulically applied brakes are used for slowing, stopping and holding turbine rotors at -40^oC to 60^oC. They can be used to carry out emergency stops and feature a small air gap between the brake pad and disc to ensure fast response times. For additional safety, brakes feature drain ports to prevent oil leakages.

Dellner Brakes offers two models of 200kN active rotor brakes, the JHS-16-LS and GL-certified JHS-22-LS.

The JHS-300 and JHS-3000 are particularly robust and designed to work in damp, dusty and corrosive environments. They feature sintered brake pads for high-speed torque braking, floating axles and a large brake pad area for lower brake disc temperatures and extended pad life.

These brakes are easy to install and maintain with very few moving parts, as well as easily removable pads and holders.

JHS-300 delivers a 55kN braking force, while the GL-certified JHS-3000 offers 130kN of power.

Hydraulically released passive rotor brakes

The JHS-PRC-317-AWA is a spring-applied, hydraulically released fail-safe brake for wind turbine rotors. It delivers a braking force of 27,000N and features an automatic wear adjustment (AWA) system that maintains a small air gap between the brake pad and disc.

This robust, high-performance brake is designed to work in adverse environments with temperatures as low as -40^oC. It features sintered brake pads for high-speed torque braking, floating axles and a large brake pad.

Rotor locks for safe and efficient turbine maintenance

Hydraulic rotor locks keep turbine hubs still to enable safe maintenance. A bolt extends and engages the rotor lock disc. It is then monitored and a corresponding signal is transferred to the turbine control system.

We offer three different sizes of rotor lock such as the GL-certified JHS-R240, which delivers up to 250 bar brake pressure, with an activation time of 35 seconds.

Hydraulic units, service tools and brake pads

Hydraulic units deliver a constant pressure of up to 250 bar, with up to 300 bar available on request. They are able to withstand temperatures from -20^oC to 40^oC and have International Protection (IP) 54-class protection.

Dellner Brakes offers a range of service tools that make it easier for your technicians to install, remove or retrofit passive and active azimuth systems, along with service pads and replacement brake pads.

About Dellner Brakes

Dellner Brakes is a leading power transmission solutions manufacturer for wind applications. Our technologically advanced products, components and systems are deployed worldwide, on land and at sea.

They are carefully engineered at our innovation centre in Sweden, which is supported by global facilities in Germany, the US, and China.

GL-type certification demonstrates high-performance and safety in accordance with stringent international standards and systems.