Download PDF version

Worn slip rings compromise the transfer of current from the rotating component of the generator to the brushes. With time, these can result in poor power transmission and the worst cases arcing and potentially a ring fire resulting in a forced outage.

Goltens Rotterdam’s in-place machining experts got the call to machine two sets of slip rings on a 43-year-old BBC generator with heavily worn slip rings. Evaluation with a straight edge showed a highly uneven wear pattern across the surface of the slip rings that required rectification.

Repairing the house slip ring

Goltens deployed its single-point journal cutting tools to the site and began the process of returning the running surfaces to an even condition.

The two sets of slip rings had been subject to previous machining repairs and were of differing outside diameters before the repairs. Also, the extent of the wear on the slip rings was uneven and each set required a differing amount of material to be machined away to get to a clean, full contact surface.

  • Slip Ring #1 – Original diameter of 507mm with a post-machining diameter of 503.10mm (3.9mm)
  • Slip Ring #2 – Original diameter of 509mm and a post-machining diameter of 508.2mm (0.08mm)

return to service

The entire repair was completed inside of 5 days onsite inclusive of waiting and staging. Both sets of slip rings were machined to a surface finish of 1.0Ra by the manufacturer’s specifications and the turbine generator was returned to service.

Download PDF version Download PDF version

In case you missed it

Marine biofuels: The future of eco-friendly shipping
Marine biofuels: The future of eco-friendly shipping

In a major push toward decarbonising maritime logistics, President Jae-young Byeon of the Ulsan Port Authority (UPA) and Chief Executive Sun-bae Hong of the Korea Maritime Cooperat...

How American sanctions may affect the global shipping industry
How American sanctions may affect the global shipping industry

President Donald Trump has already made plenty of headlines since taking up his second term in the White House, including with the announcement of numerous new tariffs on imports....

ABS sets safety benchmark in marine industry
ABS sets safety benchmark in marine industry

In recognition of its exceptional achievement in maintaining a safe work environment, the National Safety Council (NSC) presented ABS with two safety awards. The NSC is a globally...

vfd