Siemens Gamesa Adds MacArtney GRT to Storage Toolbox

Siemens Gamesa Renewable Energy has added a MacArtney generator rotation tool (GRT) to the portfolio of equipment securing long-term storage of SWT-6.0/7.0/8.0 nacelles with generators and hubs.

The nacelles are subject to long-term storage and therefore require maintenance to prevent bearing degradation during standstill. If not regularly rotated, the main bearings may suffer corrosion and quality damage, for which reason keeping components well-lubricated at all times is important.

The battery-powered and radio-controlled mobile unit supplied by MacArtney is remotely driven under the nacelle with hub and mounted generator, while the nacelle is stored on its transport frame. After correct positioning of the GRT under the generator, the fully automated process is initiated.

Equipped with embedded software and an intelligent battery package, the GRT is able to operate 10 hours a day, MacArtney said.

Performing at least five complete 360° revolutions every 14 weeks, the GRT is said to provide for a practice of keeping the main bearing well-lubricated as the GRT makes sure that the grease in the bearing is properly distributed.

In general, the procedure of rotating the main bearing protects the bearing from potential corrosion during long-term storage and guarantees that the product sustains its high-quality level. Besides, the GRT improves storage conditions and fulfils a need for reducing non-conformance costs in the long run by securing the bearings before installation far better than previous, long-term storage efforts, according to MacArtney.