Standard Transverse Thrusters
Marine Propulsion Solutions is a manufacture of Standard Transverse Tunnel Thrusters for commercial vessels. Initially used in the bows of ferries and tugs, these versatile control devices soon became popular in offshore oil servicing boats and larger ocean-going craft. They permit unassisted maneuvering alongside of oilrigs, vessels, loading platforms and docks – and provide precise control at slow speeds through locks, narrow channels and bridges. Today, PT. Marine Propulsion Solutions Tunnel Thrusters are found in applications all over the world where precision vessel control is needed.
In The Hull
The Tunnel Thruster is installed atthwartship in a tunnel low down in the bow. Sometimes a second unit is installed in the stern. For dynamic positioning and station keeping, as many as five Tunnel Thrusters have been used in a single application. With 180° thrust –90° to either port or starboard — the Tunnel Thruster gives added maneuverability and control for docking and slow-speed operations.
Because the Tunnel Thruster is relatively small in its atthwartship dimension, it can be installed in a ship with fine entrance lines and can be located in the optimum position for maximum turning moment. Complete overhaul, maintenance and removal of the mechanism are often accomplished without dry-docking.
Marine Propulsion Solutions manufactures the Tunnel Thruster with an input flange in either the vertical or the horizontal position. Customer-supplied power may be in the form of a diesel engine, gas turbine, electric motor or hydraulic motor. Models cover a wide variety of HP and RPM ranges, with diameters from 36″ to 120″.
The Tunnel Thruster Package
The Marine Propulsion Solutions Tunnel Thruster consists of a cylindrical weldment, supporting near its center a right angle gear pod with an input shaft, coupling, and propeller shaft, and a Kaplan type propeller with blades working in close proximity to a corrosion and abrasion resistant wear ring.
Forged steel shafts are mounted on tapered and straight roller bearings. Drive gears are case hardened, spiral bevels designed for shock resistance, long life and quietness.
Complete drive mechanism lubrication is through a flooded system, the entire Tunnel Thruster gearbox is running in submerged oil. The gearbox, connected to a gravity tank 10 feet above the load water line, is equipped with sight gauges to show the thrusters oil level and give visual proof of tightness of seals, which keep water out of the mechanism.
PT. Marine Propulsion Solutions fixed pitch, four blade Kaplan-type propeller, together with our efficient mechanical gear system, means low parasitic power losses from input to output – and the highest thrust in relation to tunnel diameter.
Bow/Stern Thrusters Designed and Built to Maintain High Thrust Over a Long Life
- Forged steel gears and propeller shafts
- Gear sets are lapped & matched
- Abrasion & corrosion resistant tunnels
- Tapered roller bearings
- Precisely engineered shim sets
- Special seals
- Four-blade Manganese Bronze propeller
- Extra heavy duty construction
- Three-point pod support
- Extra thick “chill rings” control distortion
- Bronze components where required
- Vertical or horizontal input shaft positions