Tunnel thruster includes that with CPP or FPP. The FPP tunnel thruster (TF-series) is equipped with variable frequency device (VFD) to control speed and reversal; the CPP tunnel thruster (TC-series) runs at constant speed, changing thrust direction via inverting pitch.

The tunnel thrust system is mainly suitable for offshore or port-arrival operations of ships; also suitable for ships that work near to and serving drilling platform, which requiring high maneuverability, reliable control and sufficient safety factor. In order to meet the requests, the tunnel thrust features in:

Tunnel: compared to embedded or spot-welding stainless steel ring, ‘explosion welding’ stainless steel ring is applied to increase reliability of tunnel. Between tunnel and gear pod is used dual sealing ring to enhance water-tight performance for less maintenance.

Gear and shaft: apply quality alloy steel.

CPP hub: Use integral hub casting, with lest components, big piston diameter, low hydraulic oil pressure, and high reliability.

Bearing: Radial and axial load are borne by respective bearing to increase stability.

Sealing: Redundant sealing is used at top of pinion shaft, and reliable sealing at propeller shaft.

Feedback: Use mechanical feedback with link bar and linear feedback transmitter, resistant to load impact.

TC/TF-series tunnel thrusts may be used for large ships in turning around in narrow fairway or port arrival & departure, via increasing ship maneuverability, also for dynamic positioning.

Tel: 0571-83802552 / 83802553