Moventas has unveiled some of its manufacturing process, giving a close up view of the components inside its 3MW gearbox.
The company explained that the gearbox is made up of a number of segments, which are all carburised to ensure a wear-free surface. Carburising is a process whereby iron or steel is heated in order to absorb more carbon, making the metal especially hard wearing.
Bearings are integrated into the planet gear to avoid common bearing failures and ensuring a precise fitting. The planet stage transmits power produced by the blades.
Before assembly takes place, each component is measured against design specifications. Each part is washed several times before it is put in place, Moventas said.
Once assembled, the gearboxes are tested with a full load to check for vibration and noise behaviour. This is done by placing a second gearbox back to back with the first to put the load on.
Heaters, sensors and electrical systems are placed on the gearbox after it has been fully assembled and painted.
To be delivered, Moventas placed the gearbox on a tailor-made stand and wraps it in Zerust film to prevent exposure to the elements.