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Relevant bibliographies by topics / Stern tube seal

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Journal articles
Dissertations / Theses
Conference papers

Academic literature on the topic 'Stern tube seal'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 February 2022

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Journal articles on the topic "Stern tube seal"

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Borras, F. Xavier, Roy van den Nieuwendijk, Vikram Ramesh, Matthijn B. de Rooij, and Dik J. Schipper. "Stern tube seals operation: A practical approach." Advances in Mechanical Engineering 13, no. 2 (2021): 168781402199440. http://dx.doi.org/10.1177/1687814021994404.

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Stern tube seals are a key component of the propulsion system of a ship. The purpose of these sealing rings is to ensure a reliable sealing condition, preventing the spillage of lubricant to the environment. The research on these large rotary seals is limited due to their complex accessibility: stern tube seals are located below the seawater level on a moving ship. A dynamic setup replicating the operating conditions of a stern tube seal is presented together with a novel arrangement for monitoring the flow rate across the seal. The frictional torque, the operating temperature, and the lubrica

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Miyazaki, Jingo, Hisashi Yoshida, Masaki Nishino, and Minoru Takayasu. "Stern Tube Oil Seal under Backward Leakage Condition." JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN 27, no. 1 (1992): 44–48. http://dx.doi.org/10.5988/jime1966.27.44.

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Borras, F. Xavier, Mohammad Bazrafshan, Matthijn B De Rooij, and Dik J Schipper. "Stern tube seals under static condition: A multi-scale contact modeling approach." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 235, no. 1 (2020): 181–95. http://dx.doi.org/10.1177/1350650120925583.

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A thermomechanical model of a stern tube seal has been developed by paying particular attention to the contact between the seal and the shaft. The finite element method is used to capture the macroscopic behavior of the seal while roughness was evaluated at a microscopic level by applying the boundary element method. The seal material was independently characterized, and the results were used to calibrate the material constitutive model used for the seal. Two specialized setups were built to validate the model in terms of radial force, contact width, and percolation threshold. By combining the

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Utomo, Budi. "Stern Tube Perannya Sebagai Media Pelumasan Dan Kekedapan Poros Baling-Baling Kapal." Jurnal Rekayasa Mesin 14, no. 2 (2019): 51. http://dx.doi.org/10.32497/rm.v14i2.1513.

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<p><em>Poros baling-baling berputar didalam tabung sehingga perlu dilengkapi dengan sistim pelumasan. Ada dua macam sistim pelumasan poros baling-baling yaitu sistim pelumasan dengan air laut dan sistim pelumasan dengan minyak. Didalam tabung poros dibagian ujung depan dan ujung belakang dipasang bantalan poros, seal dan paking, hal ini bertujuan agar bekerjanya sistim pelumasan dan kekedapan poros baling-baling dapat bekerja dengan baik. Karena tabung poros digunakan sebagai media pelumasan dengan bahan pelumas yang berbeda, maka bahan bantalan, paking dan seal terbuat dari bahan

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Shiomi, Shoji, Masanobu Itoh, Nobuyuki Nakama, et al. "Gas Flow in a Thin Annulus, With Application to a Stern Tube Seal." Tribology Transactions 34, no. 2 (1991): 223–30. http://dx.doi.org/10.1080/10402009108982030.

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Borras, F. Xavier, Matthijn B. de Rooij, and Dik J. Schipper. "Misalignment-Induced Micro-Elastohydrodynamic Lubrication in Rotary Lip Seals." Lubricants 8, no. 2 (2020): 19. http://dx.doi.org/10.3390/lubricants8020019.

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In literature the lubrication of rotary lip seals is explained by hydrodynamic action on a microscopic scale. This theory assumes perfect concentricity between the seal and the shaft which in reality seldomly occurs. Focusing on the stern tube seals application, an analysis is performed on the phenomena distorting the axisymmetric operation of rotary lip seals. Radial and angular shaft misalignments together with pressure and temperature gradients have been modelled. The model predictions are validated using a dedicated setup. Additionally, applying the soft-EHL film thickness expressions at t

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Sada, Hiroyuki, and Kenichi Saito. "Water-lubricated Stern Tube Seals for Large Ships." Journal of The Japan Institute of Marine Engineering 46, no. 1 (2011): 48–51. http://dx.doi.org/10.5988/jime.46.48.

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Borras, F., Matthijn de Rooij, and Dik Schipper. "Rheological and Wetting Properties of Environmentally Acceptable Lubricants (EALs) for Application in Stern Tube Seals." Lubricants 6, no. 4 (2018): 100. http://dx.doi.org/10.3390/lubricants6040100.

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The use of Environmentally Acceptable Lubricants (EALs) for stern tube lubrication is increasing. Although the machine components of a sailing vessel are designed to operate together with mineral oil-based lubricants, these are being replaced by the less environmentally harmful EALs. Little is known about the rheological performance of EALs in particular at the high shear rates that occur in stern tube seals. In this study, the viscosity and wetting properties of a set of different EALs is analysed and compared to traditional mineral oil-based lubricants using a set of experimental techniques.

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"Stern-tube lip seal." Sealing Technology 2012, no. 6 (2012): 15. http://dx.doi.org/10.1016/s1350-4789(12)70249-0.

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Dev, A. K., and M. Saha. "Dry-Docking Time and Labour." International Journal of Maritime Engineering Vol 160 2018 A4 Vol 160, A4 (2018). http://dx.doi.org/10.3940/rina.ijme.2018.a4.499.

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The duration of stay of a ship in a drydock depends on the scope of routine underwater (submerged portion of the ship’s hull) repairing works (dry-docking works only) to be carried out. More specifically, the repairing works that are affected by outside water. These are, mainly, hull cleaning, coating (blasting and painting), rudder, propeller, stern tube aft seal, hull anodes, ICCP, sea valves, sea chests, tunnel thruster(s), bottom plugs, underwater structural steel (bottom and shipside) and so on. These dry-docking works dictate ships’ dry-docking time (days) and labour (man-days). Then wha

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Dissertations / Theses on the topic "Stern tube seal"

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Lundberg, Johan. "Undocumented oil leakages : A study about stern tube seals and leakages." Thesis, Linnéuniversitetet, Sjöfartshögskolan (SJÖ), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-103570.

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The majority of the vessels in the commercial fleet utilize oil lubricated stern tubes. Unfortunately, this brings about a risk of oil leaking from the stern tube into the marine environment if the stern tube seal would become worn or damaged by foreign materials. Previous studies concluded that, on average, 2.6 litres of oil per day leak out from the stern tube of ships. This essay has investigated the causes that could increase the leakage rate from the stern tube by reviewing literature, interviewing experts, and sending out surveys with questions regarding the subject. The answers that wer

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Conference papers on the topic "Stern tube seal"

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Klepper, S., C. Ludlow, and M. Spadafora. "Shock-Qualified Stern Tube Seal with Improved Capabilities and Reduced Total Ownership Cost." In SNAME 15th Propeller and Shafting Symposium. SNAME, 2018. http://dx.doi.org/10.5957/pss-2018-06.

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Stern tube seals are a critical component in a ships propulsion system, sealing the shafts penetration through the hull. Stern tube seals can result in a significant maintenance burden when they are unable to handle the operational conditions of the vessel. Current systems are also lacking a capability to be able to operate through a primary seal failure, something that should be critical to the United States Navy. The United States Navy’s Independence-class littoral combat ship (LCS) has challenging operational conditions including the need to survive shock loads, high shaft speed and signifi

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Thornhill, John. "The Challenge of Stern Tube Bearings and Seals." In SNAME 14th Propeller and Shafting Symposium. SNAME, 2015. http://dx.doi.org/10.5957/pss-2015-013.

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In recent times, there has been a change of emphasis from lowest first cost to sustainable solutions, with environmental impact being high on the agenda. Risk reduction is now also one of the main drivers and is linked closely to Environmental legislation. Trends are changing in marine propulsion equipment specification. This paper discusses the drivers, the solutions, current status and future predictions of these trends within the stern tube bearing and seal business.

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Ludlow, C., A. Cutler, and S. Klepper. "Hydrogel Embedded Foam Actuators for Emergency Seal Applications: Improved Safety and Reduced Costs." In SNAME Maritime Convention. SNAME, 2014. http://dx.doi.org/10.5957/smc-2014-p42.

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Bulkhead and hull penetrations have the potential to cause substantial safety concerns during a seal failure (in the case of a stern tube seal) or a flooding event (in the case of a bulkhead seal or bulkhead penetration). In some instances,it is advantageous for these penetrations to have a running clearance during normal operating conditions and then seal during a flooding event. This paper will present the safety and cost benefits of a new seal approach for hull and bulkhead penetrations where a hydrogel embedded foam actuator is utilized. The paper will focus on applications of bulkhead sea

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Sherman, John V. "Water Soluble, Environmentally Acceptable Lubricants in Stern Tube Applications." In SNAME 14th Propeller and Shafting Symposium. SNAME, 2015. http://dx.doi.org/10.5957/pss-2015-012.

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Stern tube lubricants; used to lubricate the bearings that support the vessel propeller shaft in the stern tube, are continuously lost to the marine environment while the ship is moving under power. Although the specific amount of lubricant lost in a stern tube application is dependent on the particular stern tube system and vessel type, many reports support the fact that lubricant loss through vessel stern tubes is by far the greatest source of lubricant ingression into the environment of all vessel lubricant applications incidental to their operation. Historically, stern tube lubricants have

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Thomson, George A., and Kenneth Ogle. "Eliminating the Sterntube in New Deep Sea Ship Construction." In SNAME 15th Propeller and Shafting Symposium. SNAME, 2018. http://dx.doi.org/10.5957/pss-2018-02.

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With water lubricated shafts, the point of sealing the shaft needed to be positioned for access and that required a connecting tube to the sealing gland location. With oil lubricated bearings, a tube was required to contain the oil. As more ships are now being fitted with water lubricated bearings, the need for the ubiquitous stern tube becomes questionable. This paper will address the potential for fundamental design changes to vessel construction from the perspective of material cost reduction and the simplification of ship-building procedures, based on elimination of the stern tube. As prop

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Carter, Craig D., and Ken Ogle. "Developments in Seawater Lubricated Propeller Shaft Bearings for Commercial Ships." In SNAME 14th Propeller and Shafting Symposium. SNAME, 2015. http://dx.doi.org/10.5957/pss-2015-003.

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Early propeller shafts operated in water lubricated lignum vitae bearings and used stuffing boxes as seals at hull penetrations. The bearings, however, required regular replacement, and the stuffing boxes not ideal as seals. Around 60 years ago, new seals were developed that allowed the use of white metal bearings for propeller shafts. The technology offered a controlled environment for the bearings, which extended bearing lifespan. The weakness of the system, though, has always been the effectiveness of the seals, which must leak some amount in operation for cooling. Yet leakage into the ster

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Litwin, Wojciech. "Marine Water Lubricated Stern Tube Bearings: Design and Operation Problems." In ASME/STLE 2007 International Joint Tribology Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ijtc2007-44081.

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Faculty of Ocean Engineering and Ship Technology of Gdansk University of Technology (Poland) co-operates with ship industry and some well known manufactures of water lubricated bearings. In the last few years, three various test stands for research work with water lubricated main shaft bearings were designed and built. They were used for many different tests with various kinds of bearings. The testing process helped to understand and prove some phenomena. Water lubricated stern tube bearings are often used on modern ships. This environmentally friendly bearing is much cheaper than popular oil

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Ka, Dong-Chun, and Fabian Kock. "The EAL-Mystery: Facts and Findings from the perspective of a Classification Society." In SNAME 14th Propeller and Shafting Symposium. SNAME, 2015. http://dx.doi.org/10.5957/pss-2015-014.

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On December 19th 2013, the former Vessel General Permit (VGP) has been replaced by its second edition from the US Environmental Protection Agency (EPA). The 2013 VGP requires the use of environmentally acceptable lubricants (EALs) in any oil-to-sea interface, unless stated as technically infeasible. Due to these requirements, shipyards recently introduced EALs in stern tube lubrication upon requests of ship owners for US waters. Following this, numerous stern tube failure cases have been reported during sea-trials in ship newbuilding projects. Since many years, the classification society DNV-G

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Kokarakis, John. "Challenges in the Design of Propulsion Shafting." In SNAME 7th International Symposium on Ship Operations, Management and Economics. SNAME, 2021. http://dx.doi.org/10.5957/some-2021-003.

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Shafting system in a ship is probably its most critical component. Problems in the propulsion shafting, connecting engine with propeller may let the vessel dead in the water. This study focuses on three components of the shafting system which are well known to cause problems. These are the aft stern tube bearing, the coupling bolts and the sealing arrangement which prevents the ingress of sea water or the leakage of lubrication oil to the sea. A variety of issues related to these “weak” links of the shafting system is analyzed, based on actual cases of damage.

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Mendes, António C., Francisco P. Braga, and John R. Chaplin. "Wavetank Tests With a 1:20 Scale Model of a Distensible Tube Device for Wave Power Harnessing in the Azores." In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-18176.

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Abstract The present research focuses on the performance assessment of a wave power system targeted for electrical supply of small communities in the Azores Archipelago. Firstly, the wave power potential and wave directionality in the region is assessed. The data collected points to a device capable of withstanding severe wave climate. The device considered herein incorporates a long rubber tube filled with water, floating head to waves, connected to an oscillating-water-column (OWC) in a shaft. The shaft and power take-off system (PTO) are to be mounted on an offshore jacket platform. By inte

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