Shafts and couplings find naval applications
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Renold Hi-Tec Couplings product story
Edited by the Engineeringtalk editorial team
Mar 17, 2004
Renold Hi-Tec Couplings is about to complete two major contracts for power transmission shafts and couplings, to be installed in main propulsion drive systems on military fighting ships.
Renold Hi-Tec Couplings is about to complete two major contracts for power transmission shafts and couplings, to be installed in main propulsion drive systems on military fighting ships.
The largest order is for 12 DCB 825.5 cardan shafts and couplings to be installed in six mine hunter vessels (MHV 54 Class) for the Turkish Navy.
A vital part of the transmission system, the shaft system connects the vessel's ZF-460-1 gearbox to the propeller.
The shafts and couplings are completely non-magnetic, and also extremely robust and resilient, having been designed to withstand shock loads up to 100g and still operate.
Others features of the shaft system include the incorporation of a bearing and seal interface where the shaft passes through a fire and explosion proof bulkhead, while a self-contained hydraulic connection is also employed to allow for length compensations due to fabrication variations from one ship to another.
A second order is for Renold Hi-Tec DCB 848.0 cardan shaft type couplings to be supplied for the power transmission system on five high-speed Spanish-built frigates for the Norwegian Navy.
The couplings are fitted between the main diesel engine and a flexible mounted gearbox and have to accommodate up to 60mm misalignment under shock loads as well as provide noise and torsional vibration damping under normal operation.
Renold Hi-Tec 280WB couplings are also specified to connect the gearbox to the propeller shaft.
The couplings are able to accept some degree of misalignment and withstand a shock force of over 100,000t in an environmental temperature between -2 and +57C.
The high-speed ships are a new F310 Class, a derivative of the current Spanish Navy's F100 Class frigates, capable of using both diesel and gas turbine propulsion.
Diesel power is used for normal patrol duties, gas turbine power for rapid deployment, and the two together for maximum power of 30MW.
Renold Hi-Tec's Sales Manager, Andrew Broadbent, comments: "The specification of Renold Hi-Tec couplings on such demanding applications demonstrate, once again, the shipbuilding industry's absolute trust in their strength, resilience and reliability on critical drive systems".
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