Demand for Maritime Shaft Generators Increasing
![Controllable pitch propeller.
Source: MAN Energy Solutions](https://images.marinelink.com/images/maritime/w200h200c/llable-pitch-propellersource-man-energy-147877.jpg)
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…
Thordon Bearings and Wärtsilä Promote Stern Tube-Less Ship Concept
![Source: Thordon Bearings](https://images.marinelink.com/images/maritime/w200h200c/source-thordon-bearings-145976.jpg)
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…
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](https://images.marinelink.com/images/maritime/w200h200c/a-sterntubeless-ship-features-a-132770.jpg)
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…
Thordon Bearings Unveils New Water-lubricated Shaft Seal
![(Photo: Thordon Bearings)](https://images.marinelink.com/images/maritime/w200h200c/photo-thordon-bearings-129579.jpg)
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…