FEATURE SPONSOR
NOISE REDUCTION
What became very apparent from the testing was the importance of the size and shape of the groove. This made it essential to create a system that could replicate the most efficient design of groove and enable engineers from ISPs to be able to carry out the work.
DELIVERING THE SOLUTION The testing resulted in a kit being created that would enable an engineer to install eight grooves in total, four on the upper surface and four on the lower surface of the brake disc. The kit includes the fixturing template to correctly align the groove on the disc. The process should take approximately three hours to complete one turbine.
Having created the equipment required to install the grooves and the most efficient process to complete the task, the company applied for and received, a patent for the solution. Those wishing to use this system to reduce noise within the yaw control system can do so under the terms of a signed license agreement.
However, it is important to correctly diagnose the source of noise during yawing as it is not always attributable to the brakes. Maintenance engineers should check for oil leaks from the hydraulic power units (HPUs) and yaw bearing seals as any oil or grease on
the brake disc is a cause for concern. Noise can also be generated by the main yaw bearing as well as incorrect mesh of the yaw drive gear or the yaw drive gear motor brake not releasing. Many of these issues should be resolved during routine maintenance without the need for specialist equipment or knowledge beyond normal procedures for WTGs.
MODIFICATIONS
Over a period of 18 months, Svendborg Brakes was involved with the modification of 25 WTGs where the groove solution was installed on units from various OEMs. Since this work was completed, none of the WTGs have so far produced any noise from the yaw brake system.
In addition, other WTGs that were not fitted with components have also been successfully modified by the patented process, which opens this solution up to the majority of generator installations.
Svendborg Brakes
WEBSITE
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SERVICE SOLUTIONS
www.windenergynetwork.co.uk 35
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