Tunnel Thruster

Tunnel Thruster

tunnel thrusters are fallen into CTT controllable pitch propeller type and COCC fixed pitch propeller type, normally including prime mover, hydraulic system, remote control system and thruster itself. The prime mover is usually electric motor; sometimes, it also could be the diesel engine or hydraulic motor, and it can work under S2-30, S2-60 and S1;the remote system can connect Joystick and DP interface. The thruster itself can be transformed to be retractable configuration when coupled with the hydraulic cylinder.

CP power:320~3500kW, Blade diameter:1100mm~3300mm
CTT power:50~1000kW,Blade diameter:500mm~2100mm

Performance characteristics

To be simple and high efficient is what COSC follows after during the designing of our thrusters. To make parts easy to maintain and interchange is our quality assurance to the whole package of tunnel thrusters.

Large skewed propeller blades increase the blade ratio, and reduce the probabilities of cavitations, noise and vibration to the large extent; reasonable blade tip clearance improves the propulsion efficiency significantly.

The bevel gears are designed and manufactured to Class ISO-4 in house, which could satisfy the requirements of different input speed; the arrangement of bearings with long service life and high precision ensure the gear meshing accuracy.

Reliable material: blades and hub are produced with high strength Ni-Al bronze, and the drive shaft and gear are made of high quality alloy steel.

Drive types

SERIES

Tunnel thruster system

COCC series

COSC series retractable tunnel thrusters are the transfiguration of COSC CP and FP type Tunnel thrusters coupled with hydraulic cylinders.