A housing with series of seal rings clamped into position on the bush. Seal kit for the lower unit on volvo aq 200aq 290, aqsp. Frictional heat causes lip seal and propeller shaft wear. The drive shaft also called propeller shaft or prop shaft is a component of the drive train in a vehicle, with the purpose of delivering torque from the transmission to the differential, which then transmits this torque to the wheels in order to move the vehicle. The rubber lip seal is not a very effective solution for sealing marine propeller shafts. Lubricate the propeller shaft and hub with grease volvo penta grease tube 8282501 install the fishing line guard and propeller hub on the shaft. Diy, how to change the oil in a 4 stroke outboard, in this case a yamaha f115 100 hour service duration. For more commentary and specifications regarding propeller nut installations, please open this pdf, prop nuts. The shape, size and number of lip seals depends on the size and type of application.
Inexpensive, compact design, it guarantees incomparable performance. The stationary carbon flange is attached to the vessels stern tube with hose clamps and the carbon flange is attached to the front side of the bellows with hose clamps. Inspect both the prop shaft taper and the propeller bore, the cone shaped hole in the center, for dents, scoring, corrosion or defects of any kind. Carefully push the seal onto the propeller shaft, fit the drive flange and attach it to the engine, see fig. Axiseal mechanical propeller shaft seal blokland nonferro. Seawater for propeller shaft lubrication in merchant ships pdf, 980. Duramax mechanical propeller shaft inboard seal system that replaces the stuffing box. The pss shaft seal is the number one selling marine mechanical seal worldwide and is installed as standard equipment by many of the worlds most reputable boat builders and boat yards. These seals proved to be very effective until shaft speeds, temperatures and other parameters increased with the development of better transportation systems. Selfaligning shaft seals sureseal tides marine sureseal system tides marine sureseal is the market leader in dripless propeller shaft sealing systems. Consult blokland nonferros axiseal mechanical propeller shaft seal brochure on nauticexpo.
The seal around the propeller shaft of a military submarine is a double seal consisting of a labyrinth seal and an inflatable boot. The sureseal shaft seal is a dripfree, selfaligning propeller shaft seal that is oem equipment on many well known brands and types of vessels. Propeller shaft seals conventional water lubricated and grease fed packed shaft seals available including a selfaligning dripless shaft seal system. F or this new edition, numerous r e visions, additions and enhancements have been made t o provide an even more com prehensive guide. How to replace the prop seals on a mercury outboard our. Deep sea seals of stern tube how is water prevented from. Propeller shaft lubricant, inland navigation emissieregistratie. Since 1981, pyi has never forgotten that our company cannot exist without our customers. Seal arrangement for a propeller shaft applicantinventor. Aligning the tartan 3500 engine with the propeller shaft. A simplex seal arrangement is fitted to both inner and outer ends. Pdf design optimization of automotive propeller shafts. The sureseal supports propeller shaft sizes ranging from 1 inch up to 8 inches and from 25 millimeters to 160 millimeters.
This edition of the indus trial shaft seals catalogue supersedes the one publ ished in 2006 publication nu mber 5300. Preventing leaks in motor shafts for underwater bots. Aumuller, germany this invention relates to an arrangement 1 for sealing an opening 2 in a partition 3 in particular, in a ship bulkhead. 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. Lip seals are common in industrial applications, such as hydraulic pumps and axle seals.
The thordon seathigor seal is a mechanical face seal for 300mm 11. To prevent the clamp 2 from pinching the seal during tightening, fit the small plate 3 under the clamp so that it covers the. The seal that prevents water entering the boat is called a stuffing box 4 on the diagram. Two forms of sterntube are in use, that most commonly fitted having waterlubricated bearings with the after end open to the sea.
How does the seal of a submarine propeller shaft prevent a. This peculiar shaped ring is held in close contact with the shaft and the stern tube to prevent oil leakage or water entry. Since face seals do not use the propeller shaft as a sealing surface, you do not have shaft wear caused by the packing in stuffing boxes or the rubber lips found in. Lip seals are seals made of special kind of materials elastic, having a projecting lip or edge. The pss shaft seal can be easily retrofitted and is available for shafts ranging from 34 to 6 20mm to 150mm. The reliable azipod sealing system helps avoid oil leak ing into the sea and to prevent the ingress of seawater. As the propeller shaft turns, frictional heat is created which causes the rubber lip seal and propeller shaft to wear leading to eventual leakage through the lip seal. Propeller shaft seals from pss, orbitrade and tides marine. Set the rc boat on a workbench, cushioned underneath by some foam or rags. Quality boat propeller shaft seals from pss, orbitrade marine and tides marine. On many boats the removal of the cutlass bearing can help avoid the necessity of dropping the rudder. The solid seal is made from a highly elastic material that allows the seal to be stretched over the crankshaft propeller flange during assembly.
Depending on the propeller shaft size, it comes in 38 or 12 inch sizes. Not show is a rope guard bolt to the hull which prevents material from being wound into. Seals for water lubricated propeller shafts datum rotating. Now push the seal aft along the propeller shaft, see fig. Product overview designed for use on smaller vessels with stainless steel propeller shafts, the seriesone shaft seal is designed to. Torque ball propeller shaft group 5 torque ball outer seals 5.
Submarine propeller shaft seal download pdf info publication number us3088744a. Welcome to general propeller company your onestop marine propulsion outfitter top brands mercury, volvo penta, michigan wheel, veem, acme, buck algonquin, morse, pyi, tides, camp. For successful operation of compac propeller shaft bearings pdf, 115. Aside from these benefits, the pss shaft seal helps to eliminate water in the bilge 100% water tight and wear to the propeller shaft. Cedervall aft split oil lubricated sterntube seal type. The aft propeller shaft seal is the only barrier between the oil and the sea. Propeller installation steve dantonio marine consulting. Types of prop shaft seals, old and modern thoughtco. The lubricating seawater also comes into contact with the propeller shaft, bearing surfaces, zinc anodes, bearing staves, the seals, and bearing bushings. Seal kit lower unit for volvo penta aq 200290 series single prop 876268 glm87780. Propeller depot carries the complete line of pyi and tides marine shaft seals, and has a complete machining shop for all of your stainless steel inboard propeller shaft needs. The shaft exits the hull and connects to a propeller. The replaceable chrome liner prevents damage to the prop shaft which would be. This is done by applying prussian blue to the tail shaft tapered area.
Replacing the rear seal in the transmissionreduction gear. A plastic cap is provided with each fitting so that if the injection hose has to be removed, the cap will restrict water flow into the vessel. The re assembling of the joint is no more difficult then disassembling. Usually theres about a 1mm or so gap between the shaft and the inside of the tube, so that it can hold plenty of grease. Stern tube seals with oil lubrication have tended to use rubber rings. Sealing the drive shaft against leaks requires a few tools and products to perform the procedure correctly. If the seal is crooked or cocked, continuing with installation will damage the seal. Stern tube sealing arrangements marine propeller shaft guideline.
Confirmation of product type approval duramax marine llc. Torque ball retainer developed by buick in 1960 to fit all dynaflow from 1948 thru 1960. Propeller depot carries the entire line of pyi and tides marine propeller shaft seals, and offers them all at extremely competitive pricing. This was the firstradial lip seal to be press fitinto an outside diameter od bore. This video is about how to replace a dripless seal with new rope packing on an inboard. Changing the seals on the prop shaft of mercruiser engine is a project for winter or the offseason. This motor is a 1999 2 stroke 25hp mercury outboard that i have on my lumberyard skiff. Be careful not to scratch the surface the seal sits in on the replacing the rear seal in the transmissionreduction gear. Examine the location of the drive shaft where it exits the. It is a product equipped with a flange for the connection to the case and it is suitable for all applications. General propeller company has served the marine industry for over five decades.
It consists of a rubber ring, with a lipped profile supported by a spring, contained in a housing. Procedure for renew propeller on ship around the world. Our consistent growth has built the company into one of the largest of its kind, with a nationwide customer network. Jun 23, 2018 propeller and tail shaft bedding reveals how good is the contact. Propeller shaft and final drive both are the components of an automobile. Propeller shaft mechanical seal system for shaft from 20 mm to 185 mm. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. A sterntube forms the after bearing for the propeller shaft, and incorporates the watertight gland where the shaft passes through the intact hull.
Order today and save on all marine shaft seals and stainless prop shafts. The split seal is open to permit assembly around the crankshaft. Everything you need to know about propeller shaft packings. Propulsion product services azipod propeller shaft seal modernization the reliable azipod sealing system helps avoid oil leaking into the sea and to prevent the ingress of seawater into the bearing sump. Design optimization of automotive propeller shafts. Every now and then a sailboats prop shaft needs replacing. Volvo penta exploded view schematic propeller shaft and bearing housing. The most significantdevelopment in the evolution of the radial lip seal happened toward the end of world war ii. The grease prevents any water leaking into the boat between the tube and the propeller shaft. Expired lifetime application number inventor michiho hirata.
Order your pyi or tides marine prop shaft seal today and save. Sterntube seals have to perform two separate functions, one is to ensure that water does not enter the engine room, the second one to allow the propeller shaft to rotate as smoothly and freely as possible. Simplex shaft seal a very common arrangement for oil lubricated stern tube bearings. This is a lower maintenance solution but still requires regular service. The oil seal sits in the transmission housing and has to be pried out with a screwdriver. Repacking a dripless seal on an inboard boat youtube. Sep 11, 2017 i show how to replace your boats outboard lower unit seals without buying special and expensive tools. Mar 06, 2020 a propeller shaft is a device on which a propeller is attached to and transfers the power from the engine to the propeller. Seawater for propeller shaft lubrication in merchant ships pdf. This was the firstradial lip seal to be press fitinto an outside. Propeller shaft function, types, components and requirement. Instead of compressing two faces against each other, a spring compresses a rubber ring against the shaft. Another variety of dripless glands relies upon a lip seal that fits around the shaft.
In the late 1920s, a self contained shaft seal was created from oil resistant leather assembled into a metal case. A how to on the 150hp yamaha outboard prop service. Weve encountered a few of these packless units when they were run dry. We carry the full line of tides marine and pyi marine shaft seals, including inch and metric size as well as the maintenance kits. The cost is far less than it would be for a new complete unit but it still requires a shaft out repair, which means alignment and tuning for each individual component from the engine to the prop. Advanced technology of propeller shaft stern tube seal. Sealing principle because the labyrinth seal only reduces pressure from the ocean, the submarine n. The replaceable chrome liner prevents damage to the prop shaft which would be expensive to repair.
A common boating mishap is getting fishing line wrapped around the prop shaft behind the propeller of an outboard or sterndrive. Stern tube sealing arrangements marine propeller shaft. The pss shaft seal is a mechanical face seal that is created between the flat surfaces of the rotating stainless steel rotor and the stationary carbon flange. A complete sealing system modernization improves the reliability of the sealing system and minimizes the risk of any oil leaks. The drive shaft also called propeller shaft or prop shaft is a component of the drive train in a vehicle, with the purpose of delivering torque from the transmission to the differential, which then transmits this torque to the wheels in. Propeller shaft seals clements marine and engineering. Propeller and tail shaft bedding reveals how good is the contact.
General the seal is an aft oil lubricated face seal for propeller shafts. Propulsion product services azipod propeller shaft seal. Damage to the shaft can be caused by corrosion, bending or wear at the stuffing box or cutlass bearing surfaces. Everything you need to know about propeller shaft packings ever really wonder what shaft packings are all about. In a face seal the sealing is achieved by combining two lapped rings, stator and rotor. What do they do, how do they work, how are they are made and whether there may be a better mouse trap out there that will do the job of keeping water out of your boat without adding more complexity or worry to your boating.
The contact area in the hub is visually examined and the class requires at least 7080% of contact. Pyi quickly responds to our customers ideas and needs. Marine hardware boat props prop shafts general propeller. Seals are produced for the complete spectrum right up to heavy duty mechanical seals for commercial vessels. The device, when inflated with air or liquid, forms a tight temporary seal around the shaft, enabling repairs to be made or a replacement seal fitted when the ship is afloat, without the shaft being drawn or drydocking being necessary, summarized below some of the basic procedure of marine propeller shaft. Seal arrangement for a propeller shaft pdf free download.
Volvo penta exploded view schematic propeller shaft and. How to replace the prop seals on a mercury outboard. In very general terms, the principle used to keep the water on the outside as the shaft penetrates the hull has not changed very much since the advent of steam propulsion during the latter half of the 19th century. Clay seals still require a proper lubricant on the shaft and reinforcement with square braid fiber. We have the largest inventory of marine propeller shaft seals. Tides marine sells water pickup kits that are required by any drip free shaft seal. The propeller shaft runs from the engine through a seal in an inboard engine application. For technical specification, see backcover of this leaflet. A drive shaft, driveshaft, driving shaft, tailshaft australian english, propeller shaft prop shaft, or cardan shaft after girolamo cardano is a mechanical component for transmitting torque and rotation, usually used to connect other components of a drive train that cannot be connected directly because of distance or the need to allow for relative movement between them. Results obtained clearly show the possibility of designing a singlepiece propeller hybrid shaft made of fibrereinfoced composite and.
How is the driveshaft of a ships propeller sealed to. Welcome to general propeller company your onestop marine propulsion outfitter top brands mercury, volvo penta, michigan wheel, veem, acme, buck algonquin, morse, pyi, tides, camp general propeller company has served the marine industry for over five decades. Replacing the seals themselves is a straightforward job, but before you can replace them, you have to run. Left unattended, the line will melt into a solid blob and can cut into the seals around the shaft, allowing water to leak in and gear lube to leak out. The two crankcase front bearing oil seals used in lycoming direct drive engines are the split seal and the solid ring stretch seal. The tail shaft is then lifted vertically and matted to the propeller hub which is positioned horizontally. Simplex oillubricated sterntube seals are designed for oillubricated propeller shaft bearings and have two key purposes firstly to prevent the leakage of oil into the engine room or water, and secondly to keep water out of the sterntube. Lubricant is applied between the bearings 1 and the sockets 2 through a grease channel 4. Propeller shaft is a hollow circular shaft which is used to transmit the power or rotational motion from the gear box to the final drive. The return of real hemp to the united states market means that stuffing box materials wont break down. A driveshaft 4 november 2015 one embodiment of the seal arrangement for a propeller shaft detailed by patent wo2014202516. Cedervall aft split oil lubricated sterntube seal type seaqual. The rubber lip seal runs on the shaft to form the seal.
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