SPONSORS OF THE OPERATIONS AND MAINTENANCE FEATURE
great opportunity for the Wind Energy industry, because of their ability to provide a complete hydraulic solution from the supply of high-pressure hydraulic tools to maintenance and installation of hydraulic systems.
James Mitchell, Enerpac Commercial Manager United Kingdom, adds: “Using the expertise and experience of both
Unique foundation concept – Enerpac’s Synchronous Lifting System.
parties creates a unique combination with endless possibilities, providing hydraulic solutions into the Wind Energy industry. We have been working together for years, co-working on projects, small and large, has had a great impact on both our overall business performance. We have been involved in several large high-profile Wind Energy projects in the North and Irish Seas over the past couple of years, in which we successfully provided secure and safe high-pressure hydraulic solutions.”
BOLTING SOLUTIONS ON SITE Worlifts now offer on site calibration, testing, hire and training for a full range of bolting tools which include hydraulic torque wrenches, hydraulic tensioners, hydraulic cylinders and pump
FPI
NORTHWEST A CASE STUDY
FPI NorthWest Limited is an experienced fluid power (hydraulic and pneumatic) engineering company based in the heart of the North West of England.
FAILURE PROBLEMS A major utility company was having failure problems with the yaw brake cylinder on their onshore based wind turbine systems. The company anticipated a change-over period of 5 years on each of the cylinders. However, this turned out to be every 12/18 months and would prove to be a costly exercise.
POOR SYSTEM DESIGN FPI NorthWest Limited identified the problems as poor system design and increased exposure to dust contamination from the yaw brake shoe linings. This resulted in sealing failure (causing pressure loss) and damage to the piston rod.
SOLUTION The company implemented a change in sealing materials from standard nitrile to self lubricating, harder wearing polyurethane seals and fitted bellows to
protect the piston rod from contamination, therefore helping to minimise ingress of shoe dust contamination past the rod wiper seal into the cylinder body which caused the main seals to rapidly wear and the hydraulic fluid to quickly degenerate.
It is now more than 18 months since the first cylinder was overhauled and to date, all are still in good working order.
ENSURING FUTURE RELIABLE OPERATION Further recommendations have been made with regards to fitting a bi – directional filter on the hydraulic oil line connected to the single-acting cylinder, as the now contaminated volume of oil from the cylinder was not completing a full return to tank (because of the poor design) and therefore not re-circulating through the tank filter. The contaminated fluid was more or less being retained unfiltered in the hydraulic line.
FPI NorthWest Limited
www.fpi-northwest.co.uk
e = See enhanced entry online
www.windenergynetwork.co.uk 61
units. Dedicated vehicles carry on board a complete range of Enerpac bolting tools for demonstration.
Their on-site bolting service is carried out by fully trained engineers aboard fully equipped vehicles which are stocked with a comprehensive range of spare parts allowing on-site repairs to be carried out, saving the customer valuable tool down time incurred by tools being removed from site.
‘Worlifts, having worked in partnership with Enerpac for many years, are now looking forward to expanding their on- site services with the addition of this new dedicated ‘mobile bolting service’.
Enerpac
www.enerpac.com Worlifts
www.worlifts.co.uk e = See enhanced entry online
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