Veth jet
The Veth-Jet from Veth Propulsion in Papendrecht (Netherlands) is a maneuvering aid for installation in the hulls of ships .
A propeller with a vertical drive axis sucks in water from below the ship, which flows horizontally through a selected pipe and is ejected back into the surrounding water in a directional manner, in order to develop a pulling force through recoil.
technology
The system can be controlled from above by means of a diesel engine , electrically or hydraulically . The propeller lies in a cylindrical chamber over a protective grating, which is approximately flush with the floor of the ship. In the upper area of the cylinder jacket, 1 or all around 2–4 channels extend approximately horizontally in different directions. The water driven upwards by the propeller is deflected horizontally by curved baffles in a rotary valve and, depending on the position of this valve, passed into the channel with the desired direction of action.
Depending on the number, the channels lead away from the pump chamber at an angular distance of approximately 180 °, 120 ° or 90 ° and can let the water jet escape from the sides of the hull or - at an angle - from the hull bottom into the water.
If the Veth-Jet is installed in the ship's bow , it acts like a bow thruster . In the variant with 4 channels, the jet can work in any direction, not only pushing it to the right or left, but also braking the ship, pushing it backwards or pulling it forwards. The rotary valve rotates, controlled from the control station, coaxially around the propeller drive axis, if 2 channels are fed in an intermediate position, the recoil acts in a correspondingly resulting direction in between.
Depending on the size of the ship, systems from 80 to 1,250 kW are installed. The smallest jet with 80 kW has a propeller of 580 mm diameter and a thrust of 11.5 kN , the largest has a 1,800 mm propeller and 133.5 kN of thrust. These systems are also suitable for installation in barges .
Web links
- Manufacturer's website (Dutch; English)