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Propulsion Annual TOR: The Next-Generation Turbocharger Following the introduction of the TCA axial turbocharger two years ago, MAN B&W Diesel Group announced an expansion of the range to include a com- pletely new radial turbocharger. The TCR turbocharger will replace the cur- rent NR series that has been in produc- tion for nearly 50 years culminating in the current NR/S design. The new TCR additional sealing air requirement. The piston ring gasket, combined with a labyrinth seal, was thoroughly tested and proved to provide optimum sealing capacity both in operation and at stand- still. Flow calculations played a major part in the development of the new tur- bine in order to create a shape with high efficiency on the one hand and a wide application range on the other. Consequently the new turbine is designed to provide optimum values in part load and full load operation and the manufacturer reports that it is equally suitable for constant and pulse pressure turbocharging. Development work also concentrated on the noise level by the introduction of a completely new intake silencer, which reduces the turbocharger noise. Circle 31 on Reader Service Card series has a compressor pressure ratio of 4.7; but capable of up to 5.2 when built as a special version. Aimed specifically at the medium and high-speed diesel and gas markets, six different models are able to cover a wide range of outputs from 400 to almost 6,000 kW. The TCA and TCR are the first MAN B&W Diesel turbochargers to be com- pletely designed using a 3D-CAD sys- tem, a move which simplified and reduced development work by integrat- ing innovative software tools during the CFD (flow) and FEA (strength) analysis. With regard to the rotor support, the MAN B&W engineers came up with something special: The axial bearing was located between the two radial bear- ings which permitted minimization of the bearing space requirements. The sealing system was also designed to be as compact as possible and without any SSS Clutches Enjoys Success SSS Clutches are automatic-engaging, free- wheel-type, overrunning clutches that transmit torque through the surface contact of invo- lute-shaped gear coupling teeth. SSS Clutches have been supplied directly to 30 navies and are used by over 40 navies world- wide in gas turbine, diesel, and electric-drive main propulsion of cruisers, destroyers, frigates, patrol boats, SES, hydrofoils, hover- craft and high-speed ferries. SSS Clutches are also used for gas turbine generator starters and steam turbine turning gears. The U.S. Navy has utilized nearly 800 in their fleet. In addition, we have supplied the SSS- Tosi Reversing System for fixed-pitch propeller ships which consists of a reversing, hydraulic coupling for maneuvering and a direct-drive SSS Clutch for efficient ahead propulsion. Circle 29 on Reader Service Card m OCEAN GUARD™ FOAM FILLED MARINE FENDERS MARINE FENDERS INTERNATIONAL, INC. Latest most advanced technology in the manufacturing of foam filled fenders ENGINEERED FOR EXCELLENCE CONSTRUCTION FEATURES • Constructed to the latest US Navy and US Coast Guard specifications 11111 . r^Kg •Thick, tough filament nylon reinforced non marking seamless urethane skin • Heat laminated resilient closed cell energy absorbing foam core hi OCEAN GUARD™ Netless foam filled fenders are constructed with a heavy duty internal stud link chain which connects its integral swivel end fittings for superior pull through strength OCEAN CUSHION™ Netted foam filled fenders are constructed with a heavy duty aircraft tire and chain net mmwmk im^jmrn . 1 i. f i< v — -f-f-fc'? ! ! ! 1 : W | t^TTT^H^ Jf- j RP 1 r f m * • QUALITY * PERFORMANCE • VALUE • EXPERIENCE • TECHNOLOGY MARINE FENDERS INTERNATIONAL, INC. 909 MAHAR AVENUE • WILMINGTON, CA 90744 USA TEL: 310-834-7037* FAX: 310-834-7825 • www.marinefendersintl.com September 2004 Circle 320 on Reader Service Card 57
