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An advanced type of thrust bearing used in ships to resist the thrust of the propeller shaft and transmit it to the hull is a thrust block, also referred to as a thrust box. Many lower-rated plain thrust journal bearings were piled on one shaft to make up an early screw-propelled steamship’s thrust block or thrust box.
These presented problems in use since they were cumbersome, challenging to disassemble, wasted energy through friction, and frequently overheated. The thrust box was constructed from a cast iron enclosure that resembled a box, with radial bearings at each end and several collars produced on the shaft in between.
This shaft, which connected the propeller shaft behind to the engine in front, was frequently a brief, detachable length of shaft known as the thrust shaft. The shaft’s modest diameter was covered by a number of iron horseshoe-shaped collars that bore against the forward face of the collars on the shaft.
A low-friction pad made of babbitt metal was placed on the face of each horseshoe. A large volume of oil was required for cooling purposes as well as lubrication in the form of an oil bath inside the box.
Although lignum vitae wood, which was directly cooled by seawater, was used for the radial stave bearings in the stuffing box, this material couldn’t endure the force required for the thrust blocks of all but the oldest screw vessels.
The global Marine Thrust Block market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
The multi-fuel engine’s newest launch has been announced by the technological company Wärtsilä. The Wärtsilä 46TS-DF engine heralds a new era of medium-speed marine engines by focusing on efficiency, environmental performance, and fuel flexibility. The engine has the highest efficiency ever recorded in the market for medium-speed engines when running on gas.
Chantiers de l’Atlantique secured the first order for this engine type on behalf of Royal Caribbean Cruises. Their newest Oasis-class ship, “Utopia of the Seas,” will receive the engines.
Six Wärtsilä 46TS-DF engines with Gas Valve Units, NOx Reducer SCR systems, LNGPac, and Transverse Thrusters are being used in the construction of the ship at the shipyard Chantiers de l’Atlantique.
According to Royal Caribbean Group’s EVP Newbuilding and Innovation, “Cutting-edge efficiency and outstanding environmental performance are essential elements when developing our new ships.
” They were excited to collaborate early on with Wärtsilä and the shipyard Chantiers de l’Atlantique to ensure that these engines are the best fit to power the newest member of our fleet while advancing our environmental goals This new engine’s introduction is predicated primarily on its ability to provide owners and operators with a long-term solution for achieving their decarbonization goals.
The Wärtsilä 46TS-DF features a two-stage turbocharging system to provide excellent levels of efficiency and power density over a broad operational range for boats in all industry areas.
