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Shaft Seals News

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…

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…

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…

09 Feb 2022

Thordon Bearings Unveils New Water-lubricated Shaft Seal

(Photo: Thordon Bearings)

Thordon Bearings has debuted a new propeller shaft seal for the commercial shipping industry featuring a unique Safe Return to Port (SRTP) design.Completing the COMPAC open seawater lubricated propeller shaft bearing system, Thordon's new BlueWater Seal is described by the manufacturer as a cost effective, commercial grade axial lip seal specifically designed for merchant shipping fleets. It incorporates Thordon’s emergency SRTP capability, first used in the company’s TG100 and…