Continuing problems encountered in the operation of a major gearbox at the heart of a waste to energy plant in Denmark are being solved as the result of a comprehensive response by Allen Gears Services.
"The customer decided to replace the existing Non-Allen epicyclic gearbox after a number of problems were encountered over several years," reports Francis Moss of Allen Gears Services.
"So we offered an Allen Gears replacement unit, using our design to meet existing interfaces.
"Our main challenge was in verifying the capacity of the existing lubrication system. Fortunately we have an excellent relationship with MAN Turbo, who provided the original steam turbine package, so we've been able to work effectively with their specialists to ensure the oil system is fully capable of doing its job.
"The new unit is a generator mounted epicyclic gearbox, rated at 9150kW, with speeds 10788/1500 rpm, and an efficiency of 99.1%.
"Another important element of this project that benefits the operator is our role in supporting the precautionary monitoring of the existing gearbox while the replacement unit is in construction, running regular diagnostic checks. We will also be taking overall responsibility for the new gearbox installation and alignment, to give the customer the best possible Services support.
"This will ensure the gearbox, which drives a steam turbine alternator at the major waste to energy plant at Amagerforbraending in Copenhagen, provides long-term and efficient reliability."