Thordon Bearings is partnering with Irving Shipbuilding to supply its COMPAC water-lubricated propeller shaft bearings for the first two vessels in a series of six twin-screw vessels for the Royal Canadian Navy’s (RCN) Arctic and offshore patrol ships (AOPS)
103-m long HMCS Margaret Brooke and HMCS Harry DeWolf, both due for delivery later this year, feature a diesel-electric powertrain with four 3.6-MW diesel generators producing electricity for two 4.5-MW propulsion motors.
Each 480-mm diameter propeller shaft is water lubricated with Thorndon’s COMPAC bearing arrangement in a scope of supply that includes bearing carriers, split keys, and a Thordon water quality package. Avalon Marine Limited worked with Irving Shipbuilding to specify Thordon SXL grease-free bearings for the rudder.
Thordon regional manager Americas Scott Groves said wear data collected from the Halifax-class and other ships in the RCN fleet operating COMPAC bearings showed “remarkably low rates of wear”, with vessels avoiding frequent drydocking to replace bearings.
Irving Shipbuilding director industrial participation Aaron Plamondon said “Thordon brings decades of water-lubricated bearing expertise to the AOPS project, having supplied COMPAC propeller shaft bearings to 12 Halifax-class frigates, the first of which we delivered in 1992.”
Thordon Bearings president and chief executive Terry McGowan said the COMPAC bearing’s use of seawater as a lubricant results in a lower pollution risk. “With these AOPS due to operate in ecologically sensitive areas, environmental protection was a key element in their design.”
The company stated that over 45 navies and coast guards around the world now specify the COMPAC as a standard and the company has received orders from the Royal Australian Navy, French Navy, Brazilian Navy, Taiwanese Navy and the United Arab Emirates Coast Guard.
The companies previously worked together to deliver complete packages for naval vessels including the Hero-class midshore patrol vessels for the Canadian Coast Guard.
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