The propeller is coupled to the prime mover with shafts and bevel gears that allow rotating the propeller about a vertical axis. This type of propulsion system has a long tradition throughout the s and today such propulsion units are produced by a number of companies around the world. Because it can rotate around its mount axis, the pod can apply its thrust in any direction. Azimuth thrusters allow ships to be more maneuverable and enable them to travel backward nearly as efficiently as they can travel forward. In order to get the most out of it, shiphandling training on simulators and manned models is required. This discovery of a new operating mode eventually led to the development of the double acting ship concept in the early s.
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Improved hydrodynamic efficiency is a result of reduced hull resistance when traditional shatfline and related brackets can be eliminated and optimum hull design can be utilized. Pulling type propeller is also working in an optimum environment with highest efficiency. This is equivalent to the amount of carbon dioxide emitted by about 2, passenger cars annually. The power plant concept provides fuel savings by optimizing the loading of the diesel engines.
The power management system connects or disconnects diesel generator sets to the network depending on the vessel power requirement, reducing both inefficient low load operation and running hours of the engines. Close One of the main sources of vibration is the propeller.
As a result lower vibration and noise levels can be reached onboard the ship which improves passenger comfort. Offshore segment e. Dry cargo vessel benefit from Azipod propulsion in operations where vessel must perform reliably over an extended period at maximum efficiency, and need to be especially maneuverable in shallow waters.
For advanced icebreaking tankers and other icebreaking ships the main reason for the Azipod propulsion selection has been the unbeatable ice going characteristics and the efficiency. Azipod propulsion elevates icebreaking capability and performance to a complete new level. It enables independent ice operation in the harshest environmental conditions with predictable operating schedule, while still minimizing the need of icebreaker assistance.
Azipod propulsion is the most significant example of innovations in passenger segment. Azipod propulsion has become an industry standard in the cruise segment, with the proven ability to cut fuel consumption by up to 20 percent compared to traditional shaftline propulsion systems. The design simplicity of the propulsion system provides increased robustness and reliability, at the same time allowing for ease of maintenance.
What is AZIPOD (Azimuthing Podded Drive) Propulsion system ?
Compared to Azipod XO the efficiency is improved by installing to the pulling Azipod propulsion unit a special nozzle module including stator blades to straighten the water flow from the propeller to reduce the turbulence and energy loss and to give the optimum thrust for the vessel. Suitable ship types for Azipod XL are for example LNG tankers, ferries, cruise vessels, offshore construction vessels and tugs. Azipod XO is available up to 22 MW unit power and it is an ideal choice for vessels like ferries and cruise vessels. Azipod XO brings with it improved energy efficiency, excellent maneuverability and improved passenger comfort. For fast vessels a Contra Rotating Propeller concept can be formed of Azipod propulsion unit and conventional shaft line by replacing the conventional rudder with an Azipod propulsion unit where the propellers face each other. Azipod XO is also available with ice classes up to PC 5.
Types of azimuth thrusters[ edit ] Azimuth thrusters on the tug Oued el Kebir - note the Kort nozzles There are two major variants, based on the location of the motor:[ citation needed ] Mechanical transmission , which connects a motor inside the ship to the outboard unit by gearing. The motor may be diesel or diesel-electric. Depending on the shaft arrangement, mechanical azimuth thrusters are divided into L-drive and Z-drive. An L-drive thruster has a vertical input shaft and a horizontal output shaft with one right-angle gear. A Z-drive thruster has a horizontal input shaft, a vertical shaft in the rotating column and a horizontal output shaft, with two right-angle gears. Electrical transmission , more commonly called pods, where an electric motor is fitted in the pod itself, connected directly to the propeller without gears. The electricity is produced by an onboard engine, usually diesel or gas turbine.
Azipod® propulsors for ships
The motor is controlled by a frequency converter, which produces full nominaltorque in either direction over the entire speed range, including standstill. Over torque can also be utilized e. Each Azipod propulsion system is individually designed and optimized to achieve maximum performance. The 1. In the existing propulsion installation of the 16,dwt Arctic tanker UIKKU was replaced by a cycloconverter-controlled Sea trial results were encouraging: the same trial speed at the same shaft speed was achieved as in the original trials, however, remarkable improvements were found in the manoeuvrability. Compact Azipod Propulsion System.
Vessel powered by ABB Azipod® propulsion reaches North Pole for the first time in history