Schaeffler Single Bearing Design Concept for Multi-megawatt Wind Turbine Rtor Shafts
(November 25, 2011)
Schaeffler has developed a single bearing design concept for multi-megawatt wind turbine rotor shafts that is designed to improve the energy efficiency and reliability of the turbine and eliminate drive train components, helping to reduce its overall weight.
By using its in-house advanced rolling bearing calculation software Bearinx, in combination with Finite Element Analysis tools and multi-body simulation (MBS) models, Schaeffler’s engineers offer to assist customers during the initial stages of wind turbine design.
The company claims that this helps to improve the reliability and efficiency of the turbine under a wide variety of load conditions.
Schaeffler is able to develop bearing designs that are tailored to specific wind turbine requirements, including turbines for both onshore and offshore wind farms.
Benefits of single bearing design:
Enable more compact designs — for example, the wind turbine nacelle can be fully integrated with the bearing-gearbox-generator unit;
Such integration makes it possible to eliminate drive train components and reduce weight;
This also reduces the head weight of the turbine, allowing smaller foundations to be used;
Preloaded tapered roller bearings, which prevent axial clearance and small axial misalignments, can be utilised;
This controlled guidance of the rotor shaft means that fewer movements act on the system, reducing the negative effects on the gearbox and generator.
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