Liebherr offers new main bearings for wind turbines

At WindEnergy Hamburg, a significant industry event, Liebherr will present its new main bearing to the public. This key component is a new development that complements the existing Liebherr portfolio of slewing bearings for electromechanical and hydraulic rotor blade and yaw adjustment of wind turbines.

From September 25 to 28 in Hamburg, Liebherr will present its triple-row roller bearing, which has a diameter of 2.60 meters and a weight of eight tons.

These slewing bearings make the rotor able to turn steadily around its axis, withstanding constant high loading.

Liebherr main bearings are used in wind turbines with a capacity of 2 MW and upwards. Power generation by wind turbines is playing an increasingly important role in energy policy. Therefore, increasing efficiency is an important prerequisite for further growth in the industry. The wind turbine rotor, which is supported by a main bearing, is a key factor.

Liebherr offers moment bearings in two main designs: depending on the requirements, the prevailing loads and customer specification, double-row tapered roller bearings or triple-row roller bearing slewing rings are used. The optimized sealing concept for slewing bearings ensures that the inside of the bearings is protected against dirt and moisture and, above all, prevents the lubricant from escaping.

Valuable findings from endurance and life-cycle tests, which Liebherr carries out on its own test bench at the site in Biberach, have enabled Liebherr to optimize the bearing design in terms of cost and performance. The test bench has been in operation since last year and has provided essential validation of the design approach concerning raceway lifespan, sealings and rolling elements.