The Liebherr Group

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For the wind industry, Liebherr offers convincing solutions: On the one hand, components are installed directly into wind turbines. On the other hand, mobile, crawler, offshore and tower cranes are used for erecting wind turbines and constructing wind farms.

Offering slewing bearings and drives, Liebherr is the only manufacturer worldwide that provides single components, as well as entire systems for electro-mechanical pitch and yaw adjustment in wind turbines.

To enable the adjustment movements of the wind turbine's pitch and yaw system, Liebherr designs slewing bearings and drives for all megawatt classes of onshore and offshore wind turbines. This does not only include delivery from the broad portfolio, but also customised adaptations. Moreover, Liebherr has developed and tested a special grease for durable pitch bearing and yaw bearings. The product range further includes single and double-row tapered roller bearings or triple-row roller bearings for main bearings. Due to their no-clearance design, these bearings are particularly suitable for the highest requirements on precision and accuracy. The seamless hardened and superfinished raceways of the main bearings ensure longer running times, and thus more efficient electricity production. The in-house, state-of-the-art test bench makes it possible to qualify main bearings with an external diameter of up to six metres.

A major element of cooperation with customers is application-specific engineering to perfectly adapt each of the components. In the wind industry, Liebherr collaborates with nearly all leading turbine manufacturers, having equipped numerous wind turbines. The product portfolio comprises components for turbines from 800 kW up to solutions for multi-megawatt offshore turbines.

Services include short-term component replacement, refurbishment of damaged or older products, and the development of components that actively address field-related issues, thus extending the lifespan of wind turbines.

Innovative technology, high quality, cost-effectiveness, and long service life have secured mobile and crawler cranes a leading position in the global market. They also prove their worth in the construction of wind farms. In addition to telescopic mobile cranes, Liebherr offers lattice boom mobile cranes and crawler cranes in various performance classes specifically tailored to the needs of the wind industry. Liebherr addresses the development of more powerful systems and taller towers with performance-optimized cranes and new boom systems with particularly high load capacities. Crawler cranes in a specially designed narrow track version for wind farm construction are used on narrow paths in fully assembled condition − including the boom and at full ballast. This is very cost-effective as the equipment does not need to be assembled and disassembled each time. To erect wind turbines with hub heights of 110 m and above in low-wind areas.

Liebherr offers specially developed tower cranes with load capacities of up to 125 t. These cranes are mounted on the turbine and configured in such a way that the required lifting height can be achieved with just one guyed mast section. Advantages include the crane's small footprint, the ability to work in high wind speeds, and precise load handling with Micromove.

Liebherr provides solutions for loading and erecting offshore wind turbines. Harbor mobile cranes handle the loading of rotor blades, generators, nacelles, and monopiles for onshore and offshore wind turbines. The tandem lift assistance system Sycratronic is often used. In tandem lift, two LHM 800 harbor mobile cranes can lift up to 616 t. Heavy-duty cranes for offshore use have a lifting capacity of up to 5,000 t and a lifting height of up to 180 m above deck. This allows for meeting all requirements: diesel or electric drive units, explosion-protected cranes, and cranes for ambient temperatures between +40 °C and -50 °C. The cranes are also successfully used in the construction or conversion of oil and gas platforms, as well as for pipe laying and deep-sea operations up to 3,600 m below sea level.