Gallery: Moventas' new Exceed gearbox in testing

FINLAND: Moventas has moved into the prototype phase in the development of its new Exceed gearbox, and has shared some pictures of the testing process with “uåX˜äŠÊ˜·³Ç.

by Patrick Smith 30 January 2015

  • Exceed’s first planetary stage in the measurement room to verify that casted components are as designed

    Exceed’s first planetary stage in the measurement room to verify that casted components are as designed

  • The outer diameter of a 3MW Exceed’s housing is smaller than previous models

    The outer diameter of a 3MW Exceed’s housing is smaller than previous models

  • The gearbox in the main assembly setup, where the assembly is finalized in a tilting stand

    The gearbox in the main assembly setup, where the assembly is finalized in a tilting stand

  • Two Exceeds in the test bench in a back-to-back setup, where the other gearbox simulates load on the other

    Two Exceeds in the test bench in a back-to-back setup, where the other gearbox simulates load on the other

  • After testing, the gearbox is disassembled and components checked for wear - here, bearings get an endoscope inspection

    After testing, the gearbox is disassembled and components checked for wear - here, bearings get an endoscope inspection

  • The gearbox sits in a climate chamber at -30C to ensure it can start in extreme conditions

    The gearbox sits in a climate chamber at -30C to ensure it can start in extreme conditions

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Moventas said the 2-3MW Exceed gearbox provides 20% more torque density, with a 10% reduction in size compared with its previous 3MW gearbox, which features in Acciona turbines.

The Exceed uses new gearbox technology that provides a high 135 Newton metres per kilogramme (Nm/kg) torque-to-mass density, compared with the roughly 60Nm/kg as supplied by Moventas in 2006.

Torque density is a key focus for research and development for Moventas and its main gearbox competitors, as it is a key performance indicator in the industry.