It is one of the MC series introduced in 1982, and has a longer stroke and increased maximum pressure when compared with the earlier L-GF and L-GB designs. Any oil that passes this primary set is This doesn't harm the shaft or the stuffing box, but the spinning shaft will sling this excess flow all over the engine compartment, leading to rampant corrosion of the shaft coupling, the transmission housing, and everything else getting sprayed. The main engine seatings are in general integral with this double bottom structure, and the inner bottom in way of the engine foundation has a substantially increased thickness. crankcase being carried upwards, or used cylinder oil contaminated from Main Engine Hyundai Sulzer 7RTA 84T-D piston overhauling. Stuffing box is also seen in steam engines , at the place where the piston rod reciprocates with the cylinder cover, which helps in preventing leakage of steam from the cylinder. Headquartered close to Piraeus, our Company supports vessels with urgent or scheduled repair requirements in our workshop, in Greek ports as well as on a global level. The stuffing box comprises a casing. The stuffing box prevents sea water from entering the boat's hull. Because the crankcase is separated from the cylinder and scavenge space by All of these consist of two main components. The Entablature DROP BOX can be flange mounted to Rangermatic output or remote mounted to Revermatic or Rangermatic. The Bedplate The main engine foundation must have sufficient rigidity to transmit static and dynamic forces from the main engine into the foundation. Content (Menu) 1) 2-stroke diesel engines Operation and Service, Design - General information. Marine Machinery, Engines & Controls. If the vessel is operating at low speed or in light ship conditions it can run just one engine. Spare parts Marine Library. Remote temp. 3 ... MAN B&W Engines The ME/ME-C and MC/MC-C Series. As the piston passes down through the stuffing box, the top set of scraper rings will scrape off the contaminated oil into the bottom of the scavenge space, where it is drained away via the scavenge drains. As the piston passes down through the stuffing box, the top set of Enterprise was approximately 8 miles. The A Frames piston rod. Hydrostatics or Fluid Statics: Pressure Variation with Depth. The Piston The main component of a diesel engine is all the components that are directly related to the 4 stroke diesel fuel cycle. Stuffing box serves two main purposes. crankcase is scraped off by the lower sets of rings and is returned via Download. The main engine is cooled by two separate but linked systems: an open system (sea-to-sea) in which water is taken from and returned to the sea (seawater cooling), and a closed system where freshwater is circulated around an engine casing (freshwater cooling). In accordance with the trend, demands for dual fuel diesel engines for marine use are increasing, called ME-GI/GIE/LGIM/LGIP which utilize them as fuel as well as heavy fuel oil. MAN B&W Piston Ring - Design. Low speed engines are particularly at risk from crankcase lubricant contamination caused by cylinder oil drainage past the piston rod gland and combustion products. The Stuffing Box undesirable to allow the pressurized air in the scavenge space to leak Today, LNG, ethane, methanol and LPG are increasingly being seen as alternative fuel selections for propulsion of ships, given its economic and environmental advantages. Bench 25 . In most of the pumps, and even in the ship’s propeller shaft , the stuffing box consists of a stack of packing rings or a short square cross sectional rope made of greased flax. Headquartered close to Piraeus, our Company supports vessels with urgent or scheduled repair requirements in our workshop, in Greek ports as well as on a global level. Steam engines are widely used on ships and in railways in old days at present they are replaced by diesel engines. Crosshead Engine, This photo of a split three or four segments. The program is installed on a dedicated system and get recent critical data such as past repairs, running hours, engine parameters repair … REFERENCES 20. However this is not necessarily a good idea. The stuffing box is the seal around a boat’s propeller shaft that keeps the water out and allows the shaft to rotate freely. shown in the photo, contains a series of scraper rings and sealing rings which are each made up of The curriculum will empower marine students to take on leadership roles, encourage rigorous self-discipline, promote curiosity, and provide graduates with the skills and knowledge needed to succeed in the global economy. In between the two types of rings , a cofferdam attached with connecting pipes and bores is provided, which communicates with a control clock fitted on the engine. Cockpit 26 . While the main purpose of a nautical stuffing box is to keep water away from the propeller, a small amount of water is purposely allowed to enter the box area. Stuffing box. out, then the upper rings are worn. Marine Machinery, Engines & Controls. contaminated oil is just landed ashore or burnt. ADVERTISEMENT. Step by step instruction. 2010. Once the stuffing ring is tightly attached around the shaft, the propeller is sealed, protecting it from any sort of damage. remote indication （3 gauges） Remote temp. It is used to monitor the performance of sealing and scrapper rings. ... and even in the ship’s propeller shaft , the stuffing box consists of a stack of packing rings or a short square cross sectional rope made of greased flax. Page content. Stuffing Boxes. and increase the risk of a crankcase explosion. The main engine driven generator had been on line to provide electrical power so, when the main engine stopped, all electrical power was lost. December 16, 2015 Main Engine Exhaust Valve Failures – Marine Engineering May 25, 2014 Starting and Stopping of Diesel Engine Generator Sets in Ships Posted in: Diesel Engines | Tagged: actions needed for scavenge fire , causes of scavenge fire , effects of scavenge fire , indications of scavenge fire , inspection after scavenge fire , prevention of scavenge fire , scavenge fire SD is there a correlation between tightness of stuffing box and whether the shaft spins when under sail (if tranny is in neutral). Tech Library Pass Exam. Condition Based Overhaul Strategy. The stuffing box prevents the entry of lubricating oil from the crankcase into the scavenge air space. The drivetrain starts at the transmission and includes everything through the end of the propeller shaft – including couplings, drive plates, the marine stuffing box and shaft packing, or marine shaft seal, the flex couplings, the cutless bearing and more. Stuffing box 15 . Global Total Service Provider for Marine, Industrial and Ship Management Markets DINTEC was incorporated on Feb 18th, 1985 in Korea with the name of Dongjin Ship Management Co., Ltd. providing high quality ship management servic increase in viscosity of the crankcase oil. Planking 36 . The Fuel Injector Menu The casing is composed of an upper half portion, a lower half portion and a flange (6), and the upper half portion is connected with the lower half portion. MANB&W Engine, The Two Stroke draining out, then the lower set of rings are faulty. We give more air to engine almost the double than required for fuel combustion to keep certain things in limit. All the stuffing boxes packed with flax rings are specifically fitted to allow a bit of leakage. S.No: Spares: Minimum: Reason: 1: Main bearings or shells for one bearing of each size and type fitted, complete with shims, bolts and nuts: 1: Critical spare: As failure on one of the units may also render the engine in-operable and continue to operate with damaged bearings may also cause permanent failure of crankshaft and moving parts, consequential damages like CC explosion etc. Should the piston rod stuffing box fail, so will the engine. 32 - Stuffing Box Overhaulhttp://youtu.be/dWdWGspiqpY Copyright © 2020 Bright Hub PM. and excessive leakage can exacerbate the  incidence of scavenge fires It keeps the system operational and in cool condition. Propeller shaft 16 . While other components that are not directly related like altenator or starter motor we will discuss in another article. The housing generally consists of five ring grooves of which, the two uppermost grooves accommodate sealing rings to prevent blowing down of scavenge air along the piston rod. Building on our unique portfolio of technologies and services, we offer integrated system solutions that raise the efficiency, sustainability and profitability of the marine industries. made for the piston rod to pass through the plate without oil from the The stuffing box is flanged and bolted to the stern tube. Originally developed for the U.S. for Puerto Rico trade, the container vessel was slowly emerging in the maritime area in the 1950s. Regular flax: Properly installed flax consists of cut lengths of flax, bent into rings, which have their splits staggered around the shaft to minimize leakage. Deck 29 . Bracket 34 . 1set/ship Pump Safety device air elect.（ia） TK cleaning main line press. 2-stroke Diesel Engines Cylinder Liner, Cylinder cover, Piston, Piston Rings, Piston Rod and Stuffing box. Stuffing box oil can be re-used because the oil is not contaminated. This system has the advantage Some ships use a central cooling system, whereby the same cooling water is circulated through the main engine(s) and the alternator engines. Prolong engine or any cylinder over loading to be avoided; Cylinder liner wear must be within admissible limits ; Scavenge Space Protection Devices. A stuffing box is used which separates and seals the crankcase against the combustion chamber. Stuffing Box WHAT IS A STUFFING BOX? The main function of the box in steam engines is to prevent the cylinder steam from leaking into the engine. WHERE IT IS FITTED?1.A Stuffing Box Is An Diaphragm Plate Arrangement Which Separate Crankcase From The Cylinder And Scavenge Space On Two Stroke Cross head Engine. The Con Rod First, there is a short length of specialized hose that fits over the stern tube where it enters the bilge and, second, there is a seal that fits around the shaft and attaches to the hose. Demonstration of how to disassembling the Stuffing BoxThe video is a chapter from Video No. Thanks, Dylan. The piston rod is bolted to the piston and passes through a stuffing box mounted in the diaphragm plate. The propeller shaft passes through the stern tube, a hollow tube-like structure at the stern or rear part of the ship. Cabin 27 . checking garter spring tension, ring butt and axial clearances, and diaphragm plate. The L70MC is a single-acting, low-speed two-stroke reversible marine diesel engine manufactured by MAN B&W. Properly packed flax is compressed and watertight, but decomposes into blackened fluff over time. The sealing is adjusted to receive a few drops of fluid per minute to maintain lubrication and subside the heat generated due to continuous motion of the shaft. B.2.1 Essential for ship operation are all main propulsion plants. and the main engine shut down on low oil pressure. However if these rings are faulty, then the oil may drain into the recycling tank. Beam 30 . It can … A basic ship engine working video is shown below: This video shows how a 2 stroke marine engine on ship works-How and where is ship’s engine made? lamella fitted into a steel backing ring. 2-stroke Marine Diesel Engine Operation & Maintenance, and Troubleshooting. cooling water hot when the engine is stopped, or to allow the temperature to be raised to a suitable level prior to starting. The Crankshaft In diesel engines , stuffing box is found in the bore for the piston rod in the bottom of the scavenge air box. stuffing box showing the rings and springs was taken by Mr Dylan Wheel at We arrange technical repair for main engines and auxiliary engines built in China. Diesel History 2-stroke Engine. Engine bed 18 . Main engine lubricating oil system – This system supplies lubricating oil to the engine bearings, and cooling oil to the pistons. At 1805, when . The Camshaft Marine packing gland Marine stuffing box packing ... needs to be connected to the engine inside the ship’s engine room. MAN B&W MC/MC-C diesel engines Stuffing Box Overhaul. Parts are named on page 56. scavenge space, where it is drained away via the scavenge drains. DHTML Menu / JavaScript Menu Powered By OpenCube, ****JavaScript based drop down DHTML menu generated by NavStudio. the Ship Repair Exhibition at Olympia in Nov 2000. The Cylinder Liner These two surfaces, where the shaft and packing meet, tend to polish each other and if over tightened can lead to pre-mature shaft wear or excessive heat. Piston rod stuffing box must be maintained to prevent oil ingress in the scavenge space. Stuffing Box Drain Oil Cleaning System. Combustion in engine take place with help of air and fuel. CAUTION: Some stuffing boxes are rigidly attached to the hull, but most are connected to the shaft tube with a length of flexible hose. The conventional marine stuffing box has been around for more than half a century. The oil drained from the piston rod stuffing boxes is mixed with sludge from the scavenge air space and has to be cleaned before it is led back into the lubricating system. Main engine rating (kW) capacity (m‡) up to 1,000 4 Above 1,000 up to 20,000 P/250 Above 20,000 40+P/500 Where: P = main engine rating in kW. When it is not possible to use one piece girders and keelsons, they should at least be in alignment above and below the tank top. In steam engines, a stuffing box is strategically placed within the piston area. Locker 19 . Main engine rating (kW) capacity (m‡) up to 1,000 4 Above 1,000 up to 20,000 P/250 Above 20,000 40+P/500 Where: P = main engine rating in kW. The main purpose of a steam engine box is to prevent cylinder steam from leaking into the engine. The Engine room management system looks after the needs for timely preventive maintenance of the engine component; based on their running hours and past engine performance data. This particular stuffing box is a 1 inch box from a 1985 Catalina 36 and uses three rings 3/16 flax packing. and the main engine shut down on low oil pressure. tell tale open ended pipe into a tun dish outside the engine from where it This amount of water is not considered leakage and seldom creates a problem. diesel engine machinery_ ship repair services With a proven track record of over 100 years in ship repairs, KIMI SA has long experience in main and auxiliary engines reconditioning and maintenance. As the Piston rod passes up through the stuffing box, the oil from the Regular maintenance of the stuffing box will keep it in good condition. for ships. Introduction; Tanks ; Bottom Platform Layout Sketch; Bilge Wells; Auxiliary Machinery; Cofferdam and Drain Tanks; This post is part of the series: Engine Room Platforms; Introduction. Compatibility with different kinds of cylinder liner materials. The stuffing box is taken out together with the piston rod during overhaul of the piston, but also can be disassembled for inspection in the crankcase with the piston remaining in position. There are also drip-less seals made of Teflon or carbon. Stuffing boxes are used within steam engines, such as those that were once used to pull trains, to prevent moisture from damaging engine components. In addition, the stern tube is the only piece that connects propellers to the ship. Fuel oil tank 24. The ship is provided with three auxiliary engines Wärtsilä 8L20, 3x1600kW, and one shaft generator 1300kW. The leaking stuffing box had literally destroyed the generator. This is accomplished with a long shaft (the propeller shaft) that extends from the propeller to the engine room. Condition Based Overhaul Strategy. Store 28 . All Rights Reserved. It may be contaminated by The Exhaust Valve The rings are either bronze or can comprise of replaceable cast iron Stuffing box is used in 2 stroke marine main engine, which is of crosshead type. diesel engine machinery_ ship repair services With a proven track record of over 100 years in ship repairs, KIMI SA has long experience in main and auxiliary engines reconditioning and maintenance. Its function is to prevent the leakage of steam past the piston rod. The crankcase is separated from the cylinder and scavenge space in a two stroke crosshead engine by a diaphragm plate. Specialises in: Auxiliary Engine Spares, Chandlery, IT & Communications, Main Engine Spares and Ship Repair Services DINTEC Co., Ltd. engine reduction gearbox MM W1900 / MM W1900 NR. English Contact. Download. Keel 35 . 29 min. The two sealing rings are generally made of brass while the scrapper rings are made of steel. scraped off by another set of rings, and is led away through a drain to a (OpenCube Inc. - http://www.opencube.com)****. (The gear box of at least one medium-speed engined ship had to be expensively replaced after six months operation with the emergency coupling arrangement.) Ships Engine Rooms - Ships Main Engines & Central Machinery Placement On Ships - The Bottom Platform Explored. The bottom groves are fitted with scrapper rings in order to scrap the lubricating oil on the piston rod. In steam engines, a stuffing box is strategically placed within the piston area. if these rings are faulty, then the oil may drain into the recycling tank. Whether it’s of a small ship plying in the coastal areas or of a massive one voyaging international waters, a marine engine of either 4-stroke or 2-stroke is fitted onboard ship for the propulsion purpose. Problems caused by stuffing box leakage oil entering crankcase. In addition to that, the battery charger, engine starter motors were damaged, along with a large number of electrical connections were corroded and caused equipment failures. Material specification. MM W1900 / MM W1900 … This particular stuffing box is a 1 inch box from a 1985 Catalina 36 and uses three rings 3/16 flax packing. Freshwater is used to cool machinery directly, whereas seawater is used to cool freshwater passing through a heat exchanger. The rubber hose is clamped around the place where the propeller opens in the ship’s hull. Introduction; ... What is stuffing drain tank? It is also used in boats, where the propeller shaft it protrudes out of the hull. Alpha Lubricator. It is kind of a packing material used to seal pump, valve , stern-tubes etc. The main engine driven generator had been on line to provide electrical power so, when the main engine stopped, all electrical power was lost. The engine was restarted and the passage was resumed. 5.6 Crosshead Engine Stuffing Box Leakage Oil 15 6. Technical Brochures, Service Letters, Technical Documentation, Video. The stuffing box casing which can be split vertically, as Steering seat 22 . Global Maritime Supply Pty Ltd. Specialises in Auxiliary Engine Spares. These two surfaces, where the shaft and packing meet, tend to polish each other and if over tightened can lead to pre-mature shaft wear or excessive heat. In this type of engine the combustion space (formed by the cylinder liner, piston and cylinder head), and the scavenge space are separated from the crankcase by the diaphragm plate. 2009-10-29. Folding table 21 . Few other types of sealing arrangements such as mechanical face seal and lip seal use materials or lubrication systems which are more technically advanced. drains to a recycling tank. This can lead to severe damage of engine crankcase components and reduction of life of oil which is normally expected to last the lifetime. Page content. used cylinder oil which if mixed with crankcase oil causes an  Main engine 17 . scraper rings will scrape off the contaminated oil into the bottom of the Longitudinal girder 33 . strane thing happened during wed nite race before start - shut engine down - put gear in neutral - and was under main doing about 4.5kts under sail when all of a sudden the bloody shaft starts turning (note I have a martec folding prop). Fig 6 Stuffing Box ArrangementBetween the two uppermost ring grooves, for the sealing rings, and the three lowermostgrooves, for the scraper rings, a cofferdam has been machined out which, through a borein the housing and a connecting pipe, communicates with a control cock on the outside ofthe engine. products of combustion being carried downwards. Fig. How do They Work? You do not want to twist this hose or twist the stuffing box inside the hose. the diaphragm plate on a two stroke crosshead engine, provision must be Visit Website. Steering wheel 23. For a maximum versatility the drop box can be rotated 360° to allow the user the optimal positioning of the output flanges. In the case of a reciprocating steam engine, for example, stuffing box is applied both to the whole sealing arrangement and to the annular space into which the packing fits. indication, alarm & trip device for pump casing（1）, bearing（2） & stuffing box seal（1）. The main function of the box in steam engines is to prevent the cylinder steam from leaking into the engine. The Piston rod passes through a stuffing box which is bolted into the

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