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ROFA GmbH delivers assembly line for nacelles of wind wheels

Nordex, the world's largest procucer of wind energy plants, is currently expanding it's production capacities on the Rostock / Germany and Jonesboro / USA plant. ROFA GmbH, specialist for heavy duty automatization and conveying technology, delivers the conveyors for cyclic and continuous operation. The conveyor technique will increase the efficiency of the nacelles assembly and therefore increase the production output.
The nacelle exists of 3 moduls, whereas each is assembled in the plant, transported to the site and installed and commisioned at the location.  

1. Nacelles
2. Hub
3. Drive train

A skillet system has been chosen as the most optimal conveyor system. Because of the heavy loads up to 60 tons, the ROFA heavy duty rail system RS60 - a world's first - is implemented. This special rail offers decisive advantages: At first the heavy loads up to 70 tons (incl. skillet platforms) have to be picked up. The characteristic of the ROFA heavy duty rail system is, that the running wheels have contact via 2 points to the rail, the so called "gothical arch". The pressure angle in this case is 30°. By this trick the load can be significantly increased compared to conventional train rails and additionallly the combination of rail and running wheels  achieve a lower friction coefficient. This reduces the necessary shearing force to a minimum and lowers the wear of the drive unit.

Nacelles:
skillet system with load capacity of 60 tons
corner unit with hydraulic lifting unit
Special
transfer to cross rails by pneumatic turn plate units
length: 250 m

Hub:
skillet system with a load capacity of 60 tons
4 skillet platforms
length: 60 m

Hub assembly:
skillet system with a load capacity of 30 tons
7 skillet platforms
length: 35 m

PVE:
skillet system with a load capacity of 5 tons
7 skillet platforms
length: 20 m

Geno beam:
skillet system with a load capacity of 25 tons
3 skillet platforms
length: 30 m

Floor frame:
skillet system with a load capacity of 35 tons
2 skillet platforms
length: 20 m

Special:

on-board drive on SKID