Blade bearing test for large scale wind turbines
The BEAT 6.1 is a test bench for large windturbine bearings, designed and supplied by IDOM to Fraunhofer IWES already fully operational in Hamburg.
To add to its research infrastructure, Fraunhofer IWES decided to undertake, in Bergedorf (Hamburg), the construction of technologically advanced test facilities for blade bearings on next generation wind turbines. This is how the BEAT 6.1 project came about, a high-performance test bench capable of testing bearings of up to 6.5 m in diameter with unprecedented dynamic capabilities and precision to date.
The innovative design developed by IDOM is based on an 8-meter-high, Stewart Platform with an 11.5-meter diameter, powered by 6 hydraulic servo-actuators (each with a 350-ton capacity, and equipped with precise load cells) that are able to apply, both statically and dynamically, high loads and moments on a set of bearings (specimens) simulating, in an accelerated way, the efforts to which they will be subjected during their useful life.
The features of the bench/stand are complemented by an additional cylinder that simulates the pitch movement of the wind turbine blade and a series of adapters and steel and composite parts that emulate the rigidity of the hub and blade.
The turnkey project (design, manufacturing, assembly and commissioning) was awarded to IDOM. The mechanical, hydraulic and electrical assemblies were completed in record time and the acceptance tests by the client were successfully carried out.