Specifics of Shafting Alignmentfor Ships in Service

Komar, Ivan; Vulić, Nenad; Antonić, Radovan

doi:10.7307/ptt.v21i5.250

Cited by 6 publications

(1 citation statement)

References 2 publications

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“…In this system the shaft transfers torque of the propulsion engine to screw propeller and propulsion force from the propeller back to the thrust bearing. The most sensitive component in the propulsion shafting system is the aft stern tube bearing, which is exposed to heavy static and dynamic propeller loads exerted to the bearing surface by the propeller shaft [12]. Early arrangements used bearing materials such as lignum vitae (a very dense sort of timber) which were lubricated by seawater.…”

Section: Design and Materials Selection For Environmentally Friendly mentioning

confidence: 99%

Measurement Uncertainty Assessment in Remote Object Geolocation

Kuščer¹,

Diaci²

2013

SV-JME

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The selection of the material regarding specific design of the stern tube journal bearings in vessels is critical taking into account the lubrication system, whether oil or water based, and the consequent lubricant leakage. Therefore, the present study examines the feasibility and the advantages of implementing water lubricated polymer shaft bearings instead of conventional white metal bearings lubricated by oil. The investigation method is related to the numerical model and the software application based on finite difference method and isoviscous model. Results, based upon data collected from three different types of actual vessels in service, have shown that power loss in polymer bearings is at least 6 times less than in conventional white metal ones indicating that polymer journal bearings are significantly more energy efficient and environmentally friendly.

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Section: Design and Materials Selection For Environmentally Friendly mentioning

confidence: 99%