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Two new advanced design multi-purpose standard cargo ships-"Friendship"and"Freedom Mark II"-have been developed jointly by IHI and the Canadian naval consulting firm of G.T.R. Campbell, to meet the pressing needs of shipowners faced with the current rise in fuel prices and the depressed shipping market, as well as the increasing severity of regulatory requirements. In realizing these designs embodying many departures from customary practices, a prominent role was played by innovations brought to the main propulsion gearing.<BR>Both types of ship feature a propulsion system comprising mainly an IHI-SEMT Pielstick medium-speed diesel engine, Integrated Main Reduction Gearing, and IHI-LIPS controllable-pitch propeller, engineered to combine overall economy of operating cost and ease of operation with enhanced plant reliability.<BR>The Integrated Main Reduction Gearing features:<BR>(1) Power take-off gearing for electric generator permitting its operation with main propulsion engine running at either 520 or 340 rpm.<BR>(2) Special gear arrangement permitting the auxiliary diesel for generator to propel the ship in the event of main engine failure or for any other special purpose (attainable speed about 6 knots) .<BR>(3) Main reduction gear assembly incorporating power take-off not only for the generator but also for all essential service pumps.<BR>The resulting Integrated Main Reduction Gearing represents a compact, efficient, reliable and easily maintained assembly capable of operating in any of the six operational modes depicted in Fig. 6.
- 公益社団法人 日本マリンエンジニアリング学会の論文