Feature 2
third quarter of 2010. A Letter of Intent (LoI)
for the thrusters was signed in mid-October New gearboxes ahead of market
and a LoI for the diesel engines will be signed
shortly. demand
More recently, and in order to secure the
delivery date and quality of the TML system, rolls-royce has launched a new range of marine reduction gearboxes. the new
SeaMetric International and its main contractor, range will be phased into production through 2008, and can be fitted with a
Essca (Hong Kong) Ltd, have transferred the variety of power take-offs that enable large shaft generators to be driven, and
sub-contract for the construction of the first electric motors to feed power in for ‘get-you-home’ propulsion, or as part of a
TML vessels to a subsidiary of China National hybrid propulsion system.
Petroleum Corporation (CNPC). the design changes mainly take the form of increased stiffness and more
CNPC Liaohe shipyard, a new yard modular construction. the attraction for customers is that the new range both
directly owned by CNPC, will now take over complements and supplements the existing one.
construction of the two TML vessels and has Following an extensive analysis, the power, torque, and shaft offsets of the new
committed to deliver the vessels, in accordance sizes correspond to current and anticipated market demands in terms of engine
with the original schedule, that is, by the third power and speed, and propeller revs for a wide variety of merchant, offshore,
quarter of 2009. and fishing vessels. The new gearboxes will be type numbered after shaft offset in
The shipyard’s immediate parent company, millimetres, whether vertical or horizontal to port or starboard. First to be introduced
Liaohe Exploration Bureau, one of the major will be the size 550, followed by the 950, 1050, 850, and 650. three of the older sizes
subsidiaries of CNPC with approximately will be retained, to give a range covering torques from 90kNm to 1,200kNm.
100,000 employees, has provided SeaMetric Large reduction ratios are inherent in the design, allowing for all the popular
with a parent company performance guarantee medium-speed engines and permitting low efficient propeller speeds to the
for the project. CNPC has recently injected extent that the hull lines allow. it is likely that most of these reduction gears will
approximately US$400 million of new capital be supplied as part of integrated propulsion systems with shaft lines and CP
into CNPC Liaohe shipyard. NA propellers.
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The Naval Architect January 2008 55
NA Jan - p52+
55.indd 55 04/01/2008 15:50:37
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