Page 27: of Maritime Reporter Magazine (February 1994)

Thrusters, Water Jets, Propellers & Gears

FOR MORE

INFORMATION

For additional, detailed technical infor- mation on the products of any of the companies reviewed in this story, circle the corresponding number on the Reader

Service Card bound in this issue.

Aquamaster-Rauma ..342

Bird-Johnson Co ..343

Brunvoll ..344

Cincinnati Gear ..345

HamiltonJet ..346

KaMeWa ..347

Lips ..348

MAAG ..349

Michigan Wheel ..350

MJP Waterjets .318

North American Marine Jet ..319

Rolla SP Propellers ..320

Schottel ..321

Shipwrights, Inc .,322

Sound Propeller Services ..323

Thrustmaster of Texas ..324

Voith Schneider ....54 only or turbine diesel (CODOG and

CODAG) arrangments.

Chosen for a 19,720-kW Ro/Ro ferry project were MAAG type MG- 150 W/P gearboxes. Two of the gear- boxes transmit the total 20 MW power developed by the Wartsila

Diesel engines to two variable pitch

KaMeWa propellers, to give the 538- foot ship a speed of about 22 knots.

Each main gear train consists of two pinions that engage with an eight- foot diameter bull gear. Each gear- box weighs 25 tons complete with lubrications system.

All rotating parts run in MAAG plain bearings. Additional PTO layshafts drive on-board generators with an output of 1.6 MW. Integral tilting pad thrust bearings with a thrust collar on each side of the bull gear take up the propeller thrust.

The axial thrust is therefore trans- mitted directly from shaft to cast- ing, and hence to the foundations, resulting in a minimum of friction losses. MAAG gearboxes were cho- sen recently for another high-pro- file project, the building of the larg- est catamaran ferry ever for Stena.

For the project, MAAG will supply a split power PROPJET Gearbox Sys- tem Type HPG-185/C system.

A 50-ton crane capacity allows Cincinnati Gear to manufacture very large components, such as this 52,000-hp (39,000-kW), 140-rpm unit.

Gears

The Cincinnati Gear Com- pany, well-known for its marine reduction gears for military and commercial applications, has drawn upon its extensive gas turbine ex- perience to develop the "MA" series of gearboxes. These include a vari- ety of parallel shaft and epicyclic gearbox designs for gas turbine ap- plications of 1,000-hp and up. The gearboxes feature modular con- struction which permits them to be configured .in a variety of turbine-

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February, 1994

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