Wind turbine brakes, bearings and locks
Through our Dellner Brakes JHS brand, we offer a range of lightweight, noise-free systems for braking and gliding processes in wind turbines. Noise reduction has been the core focus in the development of this comprehensive range of brakes and sliding bearings, recognising that noise prevention plays a substantial role in the overall acceptance of wind energy. These products set standards for the industry and are used worldwide by nearly all leading manufacturers of wind power plants.
Active yaw brake calipers
Yaw brakes are used to stop and hold the rotating nacelle in position once the rotors have been turned to face into the wind. Our hydraulic active brake calipers feature special epoxy resin pads and, for added safety, drain ports that prevent oil getting onto the brake disc in the event of leakage. These robust, high performance brakes can work at temperatures from -40 to +60oC
Passive yaw sliding bearings
Our passive yaw sliding bearings have a robust yet simple design that guarantees optimum performance throughout the life of the turbine. As few components are needed, they are reliable and virtually maintenance free, so there’s less need for outages or downtime. Brake torque is applied continuously and the system slides on the yaw bearing, so you don’t need an additional brake disc. The brake torque is mainly dependent on surface pressure and friction coefficient, so variations can be built in during the design process. The system can operate at temperatures of -40 to +70oC.
For slowing, stopping and holding the turbine’s rotors, including emergency stops.
Our hydraulic rotor locks fix the hub of a wind turbine so maintenance can be carried out in safety. A bolt extends and engages the rotor lock disc, the respective end position of the lock bolt is monitored and a corresponding signal transmitted to the turbine control.