Maintenance is very easy thanks to the facetype design. Carboplanplus submarine seals are the result of extensive research, and it is a completely new kind of stern tube seal. In addition, the stern tube is the only piece that connects propellers to the ship. Water lubricated stern tube seals evk products eagle. Water lubricated stern tube seal evk water lubricated stern tube seal evk seal water is the seal face lubricant a 5 psi. China stern tube seal supplier, we aim to make satisfaction with high quality goods and service. Stern tube sealing arrangements marine propeller shaft guideline there are basically three sealing arrangements used for stern bearings.
Add an oil leakage into the mix and you could face considerable maintenance costs and unplanned downtime. Water lubricated stern tube shaft seals mide technology. Stern tube sealing arrangements marine propeller shaft guideline. Propeller shaft, stern tube and strut bearings cip. Versitec marine leading the way as your stern tube seal. Advanced technology of propeller shaft stern tube seal. Cedervall aft split oil lubricated sterntube seal type. Arguably one of the most critical shipboard systems is the seal which keeps sea water out, and allows the propulsion shaft to continue spinning, the stern tube seal.
Cedervall aft split oil lubricated stern tube seal type seaqual. Mides line of stern tube seals, currently under development, are a 100% environmentally friendly mechanical face seal option for both military and commercial vessels. A stern tube is a hollow cylindrical fitting passing through the hull. For over 70 years, simplex sterntube seals have offered the marine industry a solution. The sealing surface is created between the flat surfaces of the rotating stainlesssteel rotor and the stationary carbon flange. The stern tube is filled with oil, grease or water and forms a barrier between the water outside and the engine room inside the vessel. A stern tube with bearings radially supports the propeller shaft from the main engine. Our team of skilled engineers and technicians are dedicated to the maintenance and repair of stern tube seals. Aegirmarine would be a service company aimed at the customer. The tides marine spare seal carrier kit provides a convenient way of storing a replacement lip seal on the propeller shaft during installation of the sureseal.
Many aspects of design and ship specific factors h ave strong influence on bearing reliabilit y and durability. This compact water lubricated seal has superb vibration resistance and high sealing performance. B quicksilver high performance gear lube 92816026a4. The stationary carbon flange is attached to the front side of the bellow with hose clamps, and the back end of the bellow fits over the stern tube and is secured with hose.
Sep 22, 2018 seafarers technical guide for marine engineers nitrogen generator. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Nov 11, 2010 how a thordon compac stern tube bearing works thordon bearings inc. General the seal is an aft oil lubricated face seal for propeller shafts. Simple stuffing boxes filled with proprietary packing material. Marine water lubricated stern tube bearing is a very crucial and sensitive element. Understanding stern tube arrangement on ships world wide.
Kobelco marine stern tube seal installation this document, and more, is available for download from martins marine engineering page. Engtek is the vietnam agent for kobelco eagle stern tube seal. The drymax stern tube seal system was designed, built and tested by duramax marine in the usa. Like the fore seals, these were prepared onshore by the attending aegirmarine specialist. Stern tube seal oil leakage from a ship is considered normal operational. The seal is a waterlubricated axial shaft seal system constructed of the highest quality materials which have been engineered to deliver long service life. A long shaft known as the propeller shaft is used for. Propeller shaft, stern tube and strut bearings cip composites. Cip marine bearings are sold in raw tubes or fully machined to specification and ready for installation. Stern tube all boating and marine industry manufacturers.
Versite marine, is a anadian leading stern tube sealing manufacturer and service supplier since 2002. There are various kinds of seal systems used, such as lip type or mechanical type for oil lubricated stern tubes. Stern tube bearings, generally oil lubrication glands, are used to prevent the ingress of sea water inside the engine room and also to support the weight of the. Antipollution sealing at its best to fully achieve genuine antipollution stern tube sealing the seawater and the stern tube oil needs to be separated by an air barrier. Propeller shaft bearing systems thordon bearings inc. Vice versa, the seal prevents the leakage of sterntube oil into the water or into the. The propeller, located outside the ship, needs to be connected to the engine inside the ships engine room. Water lubricated seal manual martins marine engineering. Without it, as soon as the ship was launched, water would travel up the stern tube or through the transom directly into the ship and it would sink.
We are make independent maker independency is another strategic choice. Tides marine marine industry products sureseal shaft seals. But this is not it, the whole stern tube arrangement is packed and sealed from both the sides for additional protection of the stern tube. All the stern tube seal rings are manufactured with a specially formulated material to ensure compatibility with all. The basic function is to prevent oil leakage from and seawater penetration into the stern tube. For technical specification, see backcover of this leaflet. Lindemann mps 895 has been developed specifically for leaking stern tubes with face type seals. If the surface of your propeller shaft between the propeller shaft coupling and the stern tube is in poor condition tool marks, rust, or pits it will be necessary to bring this area of. The wartsila airguard is an antipollution lip type seal, which is especially designed for applications where extra security against the leakage of oil into the seawater is required. Cip marine propeller shaft, stern tube and strut bearings can be used as direct replacements for existing traditional rubber lined and wood bearing products.
Aegir marine decided from day one to concentrate on service for vessels in operation. The bottom half bearing is supported on chocks which in turn rest on two ford and aft machined surfaces within stern tube boss, these chocks govern the height of shafting. How a thordon compac stern tube bearing works youtube. Depending on the vessel type, lubrication for the stern tube seals, stern tube, and strut bearings is accomplished by seawater, freshwater, or oil. Like many of mides solutions, the bulkhead seal design utilized. A detachable arch is attached to the lower bearing and carries the outboard oil seal, the face of which comes into contact with a seal seat which is fastened to and rotates. Society of naval architects and marine engineers, sept. Phase i final rule and technical development document of. Propellers, of course, can weigh thousands of pounds, meaning a stern tube needs to be sturdy enough to support the propellers weight, yet engineered with enough precision to keep water from leaking into the ships stern. Stern tube is actually a guide of propeller shaft throw the boat to the sea. Follow ship builders recommendation for oil viscosity if it is specified for st bearing lubrication. These tests are intended to replicate as closely as possible actual operating conditions on board. It possesses various characteristics that make it advantageous for use. Since 1991, tides marine, located in deerfield beach florida, has provided essential marine components to the marine industry.
Unique design of seal ensures no wear of the shaft sleeve. All parts of the stern tube seal assembly were then. Sterntube seals, propeller shaft seals encyclopedia. Stern tube bearings, generally oil lubrication glands, are used to prevent the ingress of sea water inside the engine room and also to support the weight of the propeller. Cedervall aft split oil lubricated sterntube seal type seaqual.
The shaft stern tube diameter combinations normally available from stock are listed. This makes us the best source to service stern tube seals for your entire. The carboplanplus is a stateoftheart stern tube seal that is trusted by navies around the world. Sternguard inwater serviceable seal animation wartsila. Stern tube sealing arrangements marine propeller shaft. 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. The wartsila airguard completely separates the stern tube oil and the seawater by an air barrier. The stern tube, as the name suggests, is a hollow tubelike structure at the stern or rear part of the ship. Not because it sounds good, but because thats what we really want. At tides, providing excellent customer service is our number 1 priority. Analysis of inport vessel operational lubricant discharges and leakages pdf, 580. A ship needs a propeller to drive it forward against the waves. Deep sea seals of stern tube how is water prevented from.
Not just high quality, the best quality in stern seal service, only one quality is good enough. Specific design and project applications for the stern tube air seal on ocean going and other marine vessels using line shaft propulsion and pod propulsion are explained. Because of their simple construction, the evk series seals have been adopted for many small ships and coastal ships. All this while, ensuring a good working relationship with all of our clients as we are committed to leading the way in the stern tube seal market. A propeller shaft passes through this sterntube and is used to connect the propeller to the engine. Gulfsea bd sterntube oil 68 68 s x x gulfsea bd sterntube oil 100 100 s x x kluber. The most popular oil lubricated seal is a lip type seal and an example is shown in. Tides marine is the manufacturer of the drip free, self aligning, sureseal shaft seal, rudder bearings, rudder seals and a sailtrack and slide system. In a face seal the sealing is achieved by combining two lapped rings, stator and rotor. Seafarers technical guide for marine engineers nitrogen generator. It is the latest version of submarines seals by carboplan, mechanical seal, which is a leading seal used on submarines. Distance from the end of the stern tube to where the lip seal will ride on the shaft, generally between 4 to 7 inches ahead of the stern tube. Whether your vessel is in drydock or afloat, the shaft is withdrawn or bonding is required, we can provide you with the sales, technical and product support to ensure that you have the critical parts and service engineers needed to keep your vessels operational.
The drymax shaft seal is a reliable system that uses no. View pdf catalogues and other online documentation prices are pretax. A stern tube, which is present at the bottommost part of the ship, connects the engine, inside of the ship to the propeller outside. The water lubricated system utilizes innovative materials, a fully split design, and an optional innovative backup seal to provide a robust, reliable and low maintenance cost. We always offer you the most suitable equipment for your vessel.
Because of their simple construction, the evk series seals have. Ineffective marine seals can be prone to water ingress that can be damaging to the system as it causes less lubricity and more corrosion. Oils in this list were tested for compatibility with the seal material and approved for the application as stern tube lubricant. The stern tube is a hollow tube which accommodates the bearings, the seal boxes and the propeller shaft.
The stern tube is filled with oil, grease or water and forms a barrier between the. Lip seals, in which a number of flexible membranes in contact with the shaft, prevent the passage of fluid along the shaft. What distinguishes aegir is our indepth knowledge of stern tubes seals, no matter what type or make. Whether your vessel is in dry dock or afloat, whether the shaft is withdrawn or bonding is required, you can benefit from their years of experience all around the world. A housing with series of seal rings clamped into position on the bush. Additional shaft diameters and stern tube hose options are available on request. How a thordon compac stern tube bearing works thordon bearings inc. Craftsman marine stern tubes are made of seawater resistant brass. In case of seal retrofit, we are not limited to single maker solutions.
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