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VULKAN Composite shafts are especially suited for drive systems requiring low mass and/or where there is a great distance between shaft bearings. VULKAN composite shafts are used successfully world wide for marine propulsion and power generation, where reducing weight and eliminating intermediate shaft bearings were of high priority. They are currently in service on board fast ferries, patrol boats, work boats, yachts and stationary machinery. VULKAN Composite shafts are made from a carbon fiber reinforced synthetic material using the latest manufacturing techniques. The carbon fibers are wound in individual layers which are arranged in a criss-cross fashion with a specific winding angle relative to each other. This allows for a shaft that can transmit torque in either direction and through careful design the winding angle can be varied according to the desired shaft characteristics i.e. torsional and bending stiffnesses. The VULKAN Composite shaft utilizes bonded metal flange connections at both ends for connecting to the flanges in the drive train.
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The operational efficiency of a machine or plant is determined by, above all, the bearing quality at all rotating components. This applies in particular to the line-shafting of ship propulsion plants. The Simplex bearings were developed especially for this purpose as short, plain bearings. More than 21,000 have left our works to date.
Simplex bearings are characterized by a short shell length. Moreover, they can be precisely aligned to avoid edge loading. The running properties of the bearing metal have been optimized with a technically highly advanced bonding of bearing metal and shell. The vital lubrication of the bearing is safeguarded in the Simplex bearing at all times, even at low shaft speeds. Temperature sensing and monitoring systems are also supplied. Cooling systems are available for unfavourable operating conditions.
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The Simplan seal is a mechanical seal for water-lubricated sterntubes for river vessels and seagoing vessels.
Simplan seals meet the highest standards set by the "Central Commission for Rhine Shipping" (European Waterways).
They are certified by Germanischer Lloyd, the American Bureau of Shipping, by Lloyds Register and by ClassNK (Nippon Kaiji Kyokai).
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Pressure applied, spring released disc brakes
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Description
The Wichita Metana Caliper brake is
available in either Spring applied /
Hydraulic release or Hydraulically
applied / Spring release options. It is
available in a single frame size although
special mounting to suit customers
requirements may be possible. The
brake is designed for medium to heavy
duty applications where high energy
stopping and holding duties are
required.
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Steadily increasing market demands for larger and faster ships have
led to the development of CRP Azipod®, an innovative contra-rotating
propulsion system that enhances efficiency up to 15% compared to
other propulsion technologies.
Contra-rotating propulsion means that there are two propellers on
the same line rotating in opposite directions. With CRP Azipod®, a
steerable Azipod® unit is installed in place of a normal rudder, aligned
downstream of the main propeller. The Azipod® propeller takes
advantage of the rotative energy left in the slipstream of the forward
propeller, providing significant efficiency gains. CRP Azipod® combines
with most types of main propulsion.
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Using the latest CFD-methods, parameters were found, that enables a significant improvement in bollard pull and at the same time reducing the nozzle resistance at free running speeds.
The solution was found by designing the interior surface of the nozzle for maximum bollard pull, whereas the exterior surface was optimized for high free running efficiency. The nozzle design optimization was performed for the complete propulsor, i.e. including also the underwater part of the propulsion unit itself.
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The application of a nozzle increases the thrust at relatively low ship speeds. Significant savings in fuel consumption can be achieved depending on the number of revolutions and the capacity of the engine. Nozzles are aerofoil shaped rings placed around the propeller.
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Veth Motoren belongs worldwide to the market leaders of counter rotated rudder propellers.
Two propellers are mounted either side of the tail, each turning in opposite directions. The second propeller eliminates the rotation in the water caused by the first propeller. This improves the vessels performance up to even 15% compared to a single propeller! As the power is divided over two propellers, it is possible to put more power on smaller propeller diameters.
Another advantage of the counter rotated system is that it is extremely quiet. The reason for this is that the blade load is lower, because the input power is divided over two propellers and because of the rotational speed which is lower than with a single propeller.
This is a.o. why this system is more and more applied in passenger vessels, where a low sound level is very important. But also other types of vessels are more and more equipped with this counter rotated system, because of the high performance and the small propeller diameters.
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In contrast to pod drives with an electric motor inside the underwater pod, the motor in the new propulsion system will be integrated vertically into the support tube of the Rudderpropeller. This arrangement of the electric motor means that the concept is similar to that of a Rudderpropeller with a vertical power input (“L system”). Moreover, neither an above-water gearbox nor a cardan shaft will be required, making the system extremely compact and easy for the shipyard to install in the vessel.
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The SCHOTTEL Twin-Propeller (STP) is the successful optimization of the complete Rudderpropeller system with an efficiency up to 20% higher. It is the ideal means of propulsion for all vessels in the medium speed range with application-related higher propeller loads.
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The new dual-end CRP - developed by Steerprop - combines the well-recognized benefits of CRP to those of a pulling propulsion unit.
There are basically two physical features behind the efficiency gain offered by a propulsion unit with contra-rotating propellers:
- First, and most well known, is the aft propeller recovering the swirl energy left behind by the forward propeller
- Second is the splitting of the power not only between two propellers but also between two gear-sets. This makes it possible to reduce the propeller RPM and have two large propellers with light load and low speed of rotation. A combination that yields a very high propeller efficiency. Additionally, also the frictional losses are reduced because of the low RPM.
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