... shaft silenco coupling ship vibratory torque membrane Propeller and Shafting Symposium 2023 12-13 September, Norfolk, Virginia Copyright © 2023 Society of Naval Architects and Marine Engineers (SNAME) www.sname.org Innovative Solutions To Reduce The Transfer Of Structure Borne Sound In Couplings...

... Selection, development and refinement of repair and shaft finishing weld procedures meeting ABS and Navy standards for high strength alloy and carbon steel propulsion shafts are ongoing activities of Shaft Repair Facilities (SRFs). For example, processes such as Electroslag Surface Cladding...

... to better reflect the tailshaft curvature inside it, as the propeller’s weight at the end of the shaft produces a cantilever beam-like arrangement. The ultimate aim is to minimize the pressure exerted from the shaft to the bearing bottom, resisting oil field breakdown and the consequent white metal wiping...

... reservoir geomechanics geological subdiscipline configuration deflection shaft stiffness builder simulation shaftline duramax marine node stave geometry mstr bearing shaft deflection iteration elastic foundation bearing reaction Propeller and Shafting Symposium 2023 12-13 September...

... The paper discusses the methodology for and performance improvements gained using the patent pending 100 Bond® Laser Babbitting Process developed by Wartsila Shaft Line Solutions. This process is currently being used at the Wartsila Iberica facility for commercial Line Shaft and Thrust Bearings...

... 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...

... 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...

... Conical involute gears, also known as beveloid gears, are used in marine gearboxes to provide an angle between the drive shaft and the output shaft. The axes of the beveloid gear meshes reviewed can be intersecting or skewed. Beveloid gears are a general case of spur gears with their virtual...

... This paper reports substantially enhanced fatigue and corrosion-fatigue lifetimes of propulsion shaft materials, 23284A steel and 23284A steel with In625 weld overlay cladding, as a result of shot or laser peening. Glass reinforced plastic (GRP) coatings and Inconel claddings are used to protect...

... Nickel-Aluminum bronze (NAB) (UNS 63000) main propulsion shafts are employed in AVENGER Class minesweepers due to the alloy’s strength, corrosion resistance, and low ferromagnetic signature. The US Navy sought additional sources of sustaining the Fleet with refurbished shafts using weld repair...

... Propulsion shaft alignment is a necessary and crucial step in the ship construction process, with manning and schedule constraints requiring accurate results as efficiently as possible. There are two methods for measuring the bearing loading along the shaft line: strain gages and load cells...

... This document provides a detailed description of the CG, DDG, and LHD class ships’ waterborne propulsion shafting split sleeve maintenance and repair activities. Information regarding shaft sleeve inspections, acceptance criteria, repair and/or replacement options, as well as an overview...

... Marine propulsion shafts typically are composites consisting of a strong, tough (often hollow) steel, bearing-surface sleeves, and corrosion-resistant cladding. Cladding alloys include Copper-Nickel alloys, austenitic “stainless steel” alloys, and Nickelbased Alloy 625. Cladding alloy weld...

... Since 1869 the main goal of whirling vibration calculations of rotating machinery was to determine critical speeds. Currently, all Classification Societies require a propulsion shafting whirling vibration calculation (also named bending or lateral vibration calculation) in the scope...

... 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...

... KaZaK Composites, a Plasan Company has designed, fabricated, and demonstrated a novel composite S1/S2 lift fan shaft assembly for the Navy’s Landing Craft Air Cushion (LCAC) vehicle. The shaft is a drop-in replacement for the legacy steel shaft assembly and provides the same performance...

... SKF Marine ISC was requested by STX Finland Oy, location Rauma to perform full scale dynamic propulsion shaft measurements on board of the RoPax vessel “Pride of France” in order to solve high shaft support bearing operational temperatures. After modeling the propulsion line with a state...

... This paper presents the results of two failure investigations carried out by DNV Maritime Technical Advisory. The first case is the failure of an oil distribution shaft in the main propulsions shafting for on oil tanker. The second case is the fracture on a high speed intermediate shaft...

... Bulkhead seals are critical safety components which stop progressive flooding between watertight compartments at the location of the shaft penetration through the bulkhead. Most bulkhead seal technology is based on a contacting approach where sealing materials are always in contact...

... There are three main problems for engineers specializing in propulsion train calculation. The first problem is a lack of a single shaft model to perform all types of shaft related calculations, the second is the inability to analyze different operation states of propulsion shafting in one click...