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Thursday, May 30, 2024

Shafts News

21 May 2024

Thordon inks deal to Refit 32 Panamanian Vessels

Thordon’s SXL tailshaft bearings.
Image courtesy Thordon Bearings

Thordon Bearings won a contract to convert the rubber tailshaft bearings across an entire fleet of Panama-operating tugs, pilot vessels, and workboats to water-lubricated polymer bearings.The agreement with the unnamed operator follows the retrofitting of Thordon’s SXL tailshaft bearings to 12 of its twin-screw tugs last year during scheduled dry dockings.The remaining 32 vessels will now be converted in batches at planned maintenance intervals over the next four years.For the first batch of retrofit conversions…

15 May 2024

Stena’s Ro-Pax Vessel with Wärtsilä Propellers Obtains DNV Silent Operations Notation

Stena’s  Ro-Pax vessel Ala’suinu - Credit: © Stena RoRo

Stena’s new Ro-Pax vessel, Ala’suinu, equipped with Wärtsilä propellers has received DNV’s Silent(E) notation, issued to vessels that demonstrate the ability to effectively reduce emissions of underwater radiated noise.Technology group Wärtsilä has designed and delivered controllable pitch propellers for Stena’s new Ro-Pax vessel, Ala’suinu, which has successfully completed sea trials.Following these sea trials, Ala’suinu became the first Ro-Pax vessel to fulfil the DNV Silent(E) notation…

14 May 2024

Brunvoll System to Propel Cyan Renewables New SOV

Illustration for Cyan Renewables new SOV (Credit: Vard Design)

Brunvoll has signed a contract with Vard for the delivery of a comprehensive propulsion and maneuvering system for Cyan Renewables' new Service Operation Vessel (SOV).The vessel will have the first azimuth propulsion thrusters from Brunvoll with an 8-degree tilted propeller and nozzle, for enhanced performance during dynamic positioning operations.The delivery for the new SOV consists of two azimuth propulsion thrusters, two retractable azimuth thrusters, a tunnel thruster, and…

18 Apr 2024

Damen Naval to Equip ASW Frigates with Kongsberg’s Propellers

Anti-Submarine Warfare (ASW) frigate (Credit: Damen)

Damen Naval has selected Kongsberg Maritime Sweden to deliver controllable pitch propellers and shaft lines for the four Anti-Submarine Warfare (ASW) frigates for the Netherlands and Belgium.As part of this contract, Kongsberg will supply four shipsets of its controllable pitch propeller systems and associated equipment including blades, hubcaps, hubs, and shaft lines.The four ASW frigates will replace the current Karel Doorman-class multi-purpose frigates. They will be deployed for a wide variety of tasks, with anti-submarine warfare as their main purpose.

16 Apr 2024

Wärtsilä Launches New High-Performance Thruster and Propulsion Control Solution

(Credit: Wärtsilä)

Wärtsilä has introduced a new high-performance thruster and propulsion control solution, which is said to raise the level of offshore dynamic positioning for greater efficiency and operational performance of vessels.The company’s new high-performance thruster and propulsion control solution package utilizes a combination of Wärtsilä’s WST-E embedded electric steerable thruster and WST-R retractable thrusters, together with an updated remote propulsion control system featuring an enhanced user interface ProTouch…

21 Feb 2024

Demand for Maritime Shaft Generators Increasing

Controllable pitch propeller.
Source: MAN Energy Solutions

30 years ago shaft generators with PTI capability kept container ships sailing at top speed. That purpose gone, PTI/PTO is making a new comeback in more cargo shipping segments, this time for reducing emissions.Retrofitting a shaft generator is not an insignificant undertaking. Around 50 tons of equipment needs to be installed into the engineroom through a hole in the hull. A new section of shaft is usually required.That a few shipowners are undertaking such projects - Klaveness Combination Carriers on the Ballard…

31 Jan 2024

Thordon Secures Mexican Navy Deal

(Photo: Thordon Bearings)

Thordon Bearings reports it has secured a second major Mexican Navy contract for the supply of its water-lubricated SXL wear rings for retrofit installation to the waterjet propulsion nozzles on 25 interceptor patrol vessels.The contract follows the success of extensive trials in which the SXL material replaced the use of other anti-corrosive coatings in waterjet impeller housings, resulting in increased resistance to cavitation induced corrosion.Rotary Parts, Thordon’s authorized distributor in Mexico, is supplying the housings for 25 Polaris and Polaris II fast patrol boats.

04 Dec 2023

Thordon Bearings and Wärtsilä Promote Stern Tube-Less Ship Concept

Source: Thordon Bearings

Thordon Bearings and Wärtsilä have announced the formation of the Blue Ocean Alliance to develop and promote a stern tube-less ship concept.The Blue Ocean Alliance brings together Thordon Bearings, Wärtsilä, the School of Naval Architecture & Marine Engineering of the National Technical University of Athens (NTUA), naval architect SDARI (Shanghai Merchant Ship Design & Research Institute CSSC) and ABS.The companies say that the concept of a ship design that does not require a…

15 Sep 2023

Shaft Power Monitoring Solution Earns BV Type Approval

© Ascenz Marorka / Adobe Stock

Ascenz Marorka, a GTT Group company, announced that it has been granted a Type Approval certification for its ShaPoLi solution by the classification society Bureau Veritas.Designed to help shipowners and operators comply with the International Maritime Organization (IMO) regulations aimed at curbing greenhouse gas emissions and reducing ship carbon intensity by 40% by 2030, the solution monitors propeller shaft power and signals an alert in the wheelhouse if it exceeds the EEXI calculated maximum power. The system logs the periods where the limit was exceeded and enables crew to give comments.

05 Sep 2023

ClassNK Amends Rules for Seawater-lubricated Shafts

(Image: Thordon Bearings)

Nippon Kaiji Kyokai (ClassNK) has joined the major classification societies to amend its rules relating to the inspection of seawater-lubricated propeller shaft systems.The amendment means that ships with open seawater-lubricated propeller shafts that are built to ClassNK rules are subject to the same 15-year shaft withdrawal inspection periods as oil-lubricated shafts and sterntubes, subject to monitoring criteria.The announcement brings ClassNK’s requirements in line with those of other large class societies…

26 Jun 2023

SUMED Taps Thordon to Equip Pipeline Service Boats

SUMED 4, is one of seven SUMED service boats fitted with Thordon SXL tailshaft bearings (Photo: Thordon Bearings)

Egypt’s SUMED pipeline operator Arab Petroleum Pipeline Company (SUMED) has completed the tailshaft conversion to Thordon’s SXL seawater-lubricated bearing system for seven special purpose single point mooring (SPM) service boats.The final vessel in a series of 17.5m (57.4ft) long, 1976–built service boats had its original oil-lubricated tailshaft bearings replaced with the Thordon system at Nefertiti Marine’s Yard-K, in Rosetta Nile, in December 2022. The first vessel, SUMED 10…

05 Jun 2023

Hydrex Conducts Underwater Stern Tube Seal Repair in Algeciras

Hydrex diver/technician taking shaft weardown reading.

Last month, a Hydrex diver team carried out an underwater stern tube seal repair on a ro-ro ship berthed in Algeciras, Spain.The ship was suffering from an oil leak, making an on-site repair necessary. Using a Hydrex flexible mobdock, the team was able to carry out the entire operation on-site and underwater, saving the owner an expensive and time-consuming trip to drydock.Once the operation was approved, all preparations were handled swiftly and the lightweight equipment was…

01 Jun 2023

Wärtsilä Helping with Decarbonization of Orient Express' Bulk Carriers

 The project will create and validate a digital model of the ‘TBC Prestige’, based on measured real-life data © Transworld Group

Finland-based marine technology group Wärtsilä will partner with Transworld Group to apply what it says are the most advanced decarbonization modeling capabilities to the bulk carriers sector of Orient Express lines of Dubai.Orient Exrpress is owned by Transworld Group and Managed by Transworld Ship Management (TWSM), one of India's premium private sector ship management firms. The project aims to provide decision-making support by simulating the impact of efficiency upgrade technologies on the vessel’s environmental performance.

16 Mar 2023

Marine Propulsion: Inside Schottel's New SRP-D

SRP-D with a propeller shaft with an eight-degree tilt. Image courtesy Schottel

The increased performance of the fast-responsive Schottel RudderPropeller Dynamic SRP-D was confirmed by external sources. Initial investigations into the effect of thruster response on DP positioning were carried out in cooperation with MARIN, based in the Netherlands, and Polish ship designer MMC. The results obtained demonstrated much-improved position accuracy and enhanced operability of the vessel.Further calculations made by DNV and simulations from a cooperation with VARD showed that the SRP-D greatly improves the vessel’s operational performance and environmental impact…

08 Feb 2023

Wärtsilä, Berge Bulk in Marine Industry’s "First-ever" Shaft Generator Retrofit

 Shaft generator entering Berge Toubkal in Drydock © Wärtsilä Corporation

Finland's marine technology company Wärtsilä said Tuesday it had retrofitted an inline shaft generator system on the ‘Berge Toubkal’, a cape-size bulk carrier owned by Singapore-based Berge Bulk, in what it said was an industry first."This is the marine industry’s first-ever shaft generator retrofit, and its successful completion will improve the vessel’s Energy Efficiency Existing Ship Index (EEXI) while reducing overall carbon footprint," Wärtsilä said."Shaft generator systems onboard ships are driven by the main engine to supply power to the mains, thus saving fuel and emissions.

24 Nov 2022

ABB's Shaft Generator Systems for COSCO's Ten Container Ships


ABB has secured a contract with the Chinese shipyard COSCO Shipping Heavy Industry (Yangzhou) Co. Ltd., to equip 10 China COSCO Shipping Corporation Limited container vessels with its permanent magnet shaft generator systems. Due for delivery by the end of 2025, the order comprises systems for six 14000TEU vessels and four 16000TEU vessels."The International Maritime Organization (IMO) is introducing new regulatory standards – the Energy Efficiency Existing Ship Index (EEXI) and Carbon Intensity Indicator (CII) – which will come into force in January 2023.

13 Oct 2022

NYK, MTI earn ClassNK Approval for CBM Ship Maintenance Method

Lubricant oil outlet temperature sensor. Image courtesy NYK

NYK and MTI Co., Ltd. received approval from ClassNK for a new condition-based maintenance (CBM) method implemented on NYK-owned coal carrier Noshiro Maru. The certified CBM is a method for monitoring the condition of bearings of large marine diesel engines through temperature data, a method that was adopted in the "CBM Guidelines, Second Edition"4 issued by ClassNK in 2021.In addition, the Diesel Engine Main Bearing Condition Monitoring System, which visualizes bearing temperature data that can be obtained through sensors installed on the main bearings and ship operation data…

08 Sep 2022

Water Lubricated Propeller Shaft Bearings Reduce Fuel Use -Study

(Image: Thordon Bearings)

Peer-reviewed research by Thordon Bearings into the hydrodynamic lubrication efficiency of a ship’s propeller shaft bearing has found that the use of seawater-lubricated elastomeric polymer bearings reduces fuel consumption.The environmental and financial benefits of adopting a seawater-lubricated propeller shaft system are well documented, but this is the first indication that the arrangement reduces hydrodynamic resistance enough to improve fuel consumption, compared to a conventional…

24 Aug 2022

DNV Launches Class Notation for Enhanced Tailshaft Condition Monitoring and Performance

© Kalyakan / Adobe Stock

With its TMON(Oil lubricated, +) notation, DNV said it becomes the world’s first classification society to provide a qualified notation that adds another dimension to propeller shaft and bearing condition monitoring.The new notation serves to further minimize propulsion safety risk and prevent costly equipment failure, building on the benefits of the existing TMON class notation. Current DNV class notations TMON(Oil lubricated) and Shaft align are pre-requisites to meet the requirements for assignment of TMON(Oil lubricated…

23 Aug 2022

Thordon’s SXL Bearings Installed on History-making Ferry Daleela

Thordon Bearings’ Egyptian distributor and integrated services provider Nefertiti Marine has commissioned the water lubricated Thordon SXL propeller shaft bearings installed aboard the 24,112gt ferry Daleela.The 1991-built, 400-passenger capacity RoPax, owned by El-Etehad International and chartered to Scandro Holdings, began operations on the revived Piraeus–Limassol route in June 2022 following an extensive refit in the floating dock operated by the Suez Shipyard in Egypt.Nefertiti Marine supplied a total of 14 Thordon SXL forward…

27 Jun 2022

Thordon Wins Shaft Seals Order

The Judilily is now fitted with TG100 shaft seals (Photo: Thordon Bearings)

Thordon Bearings’ authorized distributor in Mexico, TZ Industrias, has secured an order to supply the Canadian company’s TG100 shaft seals, equipped with a safe return to port (SRTP) emergency seal, to a quartet of shrimpers operated by Pesquera Axel, one of the country’s leading fishing vessel operators.TZ Industrias will deliver four 127mm (5in) diameter mechanical seals to the Mazatlán-based repair yard Constructora y Reparadora de Buques for installation this June to the 7m (23ft) long fishing vessels Kukulkan…

08 Jun 2022

ABS AIP for "Sterntube-less" Ship

A sterntube-less ship features a shorter shaft with the prime mover further aft the vessel. Image courtesy Thordon Bearings

Thordon Bearings said ABS issued an Approval in Principle to the “sterntube-less ship” concept developed in cooperation with the Shanghai Merchant Ship Design & Research Institute (SDARI), the National Technical University of Athens (NTUA) and Thordon Bearings Inc.The design replaces a vessel’s sterntube with an irregular shaped chamber that allows a shorter, water-lubricated propeller shaft to be inspected and maintained while the vessel is afloat, without having to withdraw…

06 Jun 2022

LR Approves Neda Maritime’s Power Limitation Technology

(Photo: Lloyd’s Register)

The Shaft Power Limitation (ShaPoLi) system, engineered to help optimize tanker engine output ahead of impending EEXI (Energy Efficiency Existing ship) regulations, has gained approval from classification society Lloyd’s Register (LR).Developed by SELMA in conjunction with Tankers Technical Department of Neda Maritime Agency Co Ltd, the system will be fitted on board the Neda-operated 319,000 dwt very large crude carrier (VLCC) Aragona, enabling full use of available engine output…