Seals can be customized for use with competitor housings. The angle α between the frusto-conical surface 54 and the rotational axis of the housing is preferably large enough to ensure that foreign matter in the flared portion 53 will slide along the frusto-conical surface 54 and be discharged through the open end 51, that is the tangent of the angle should be greater than the maximum possible coefficient of friction of any foreign matter likely to enter the passageway 50. A labyrinth seal may be composed of many grooves that press tightly inside another axle, or inside a hole, so that the fluid has to pass through a long and difficult path to escape. The end cap bearing assembly of FIG. TS 52, SKF, Labyrinth seal Metric, Seal, Labyrinth seals. It is important that labyrinth seals should be periodically lubricated to ensure that there will always be clean grease inside the labyrinth. Good sealing performance requires the seal to operate at high contact pressure, which generates a large amount of frictional heat. The tongues 132, 133 are however non-circular and the surfaces thereof defining the walls of portions 136, 137, 138 are each provided with three lobes spaced close to the opposing surface on the tongues 134, 135. This complex maze-like pattern prevents contaminants and splashing liquids from hitting the bearing. CR Seals has also been part of SKF since 1990, a span during which we’ve developed new materials, manufacturing processes and designs to create some of the most robust seals … This purges the labyrinth of contaminants and helps block the entrance of contaminants. After rigorous tests at the SKF laboratory in King of Prussia, Pennsylvania, the seal design found to be best suited is that shown in figures 1 and 2. The labyrinth seal of the invention is particularly suitable for sealing the bearings in end cap assemblies for conveyor rollers which in operation may frequently be subjected to dust, dirt and water. Privacy Policy The end cap bearing assembly of FIGS. Demands on the seal were high, requiring a seal able to perform effectively even if the shaft is misaligned up to 1.5 degrees. 10, 1980, now abandoned. Sometimes screw threads exist on the outer and inner portion. 4. Different constructions of labyrinth seals according to the invention, incorporated in end cap bearing assemblies for conveyor rollers, will now be described, by way of example, with reference to the accompanying drawings, in which: FIG. The device according to the invention may be arranged so that the frusto-conical surfaces defining the flared portion of the labyrinth passageway are circular in cross section normal to the axis of the seal with one frusto-conical surface eccentric relative to the other frusto-conical surface, whereby the two surfaces form a positive displacement pump operable upon relative rotation between the members to pump foreign matter in the flared portion along the passageway in the direction leading to the outer end of the passageway. 1), currently well accepted on the American continent, has been developed to, SKF has received the Best Supplier of the Year from Traktionssysteme Austria (TSA) in recognition of its contribution to the success of the traction. Color: white. The seal can be grease-purged manually with a grease gun, using the SKF System 24 or with a SKF Automated Lubrication System (ALS). To ensure that the width of the open end 51 is not smaller than that of the remainder of the flared portion 53 angle between the frusto-conical surface 54 and the axis of the housing is greater than the angle between the frusto-conical surface 55 and the axis of the end cover, so that the surfaces 54, 55 diverge away from each other in the direction towards the open end 51 of the passageway as shown in FIG. FIG. The end cap bearing assembly of FIGS. A wide variety of bearing labyrinth seals options are available to you, such as material, style, and applicable industries. 1 in that the flared outer portion 78 in FIG. This SKF ready-to-mount pillow block housing with inch dimensions has a housing made of steel and has four mounting bolts, a spherical roller bearing insert, and labyrinth seals. The foreign matter will also be subjected to centrifugal force due to circulation movement around the flared portion. For higher speeds, SKF developed a radial labyrinth seal. 308/187, 308/187.1, 308/187.2, 308/189R, 384/135, 384/144, 277/53, 277/55, 277/56, 277/57, Click for automatic bibliography The end of each groove remote from the open end 51 of the labyrinth passageway is closed by a step between the base of the groove and the surface 54, and the end of each groove adjacent the open end 51 is chamfered to permit free flow of any material out of the groove when subjected to centrifugal force upon rotation of the housing. Demands on the seal were high, requiring a seal able to perform effectively even if the shaft is misaligned up to 1.5 degrees. All rights reserved. The end of the tongue 27 is also provided with a frusto-conical surface 56 which co-operates with a frusto-conical surface 57 on the tongue 36 to provide another portion 58 of the annular passageway which is flared radially outwards and will exert a centrifugal force on any foreign matter circulating around the portion 58 due to frictional resistance between the foreign matter and the surface 56 on the housing upon rotation of the housing. When dirt particles come into contact with the seal, they are stopped by the stationary part and are flung off from the bearing unit by the outer rotating sheet steel part. This phenomena did not however occur in many other seals of the same construction in which the walls of the passageway diverged from one another in the direction away from the outer end of the passageway. There are non-contacting, or labyrinth seals, and for more positive sealing, contacting or lip seals. The end cap assembly of FIG. FIG. SKF Taconite seals are designed for use with SAF series pillow blocks and is used to retain lubricant and protect against contamination. 7 has the advantage over that of FIG. 4, 5, 6 show modified constructions of the labyrinth seal of FIG. FIG. Near Me. 8 is a cross sectional side elevation of an end cap bearing assembly incorporating yet another construction of labyrinth seal adapted to throw out foreign matter by centrifugal force. 7 is of greater length than the flared portion 53 of FIG. The labyrinth seal between the housing and the end cover is shown more clearly on a larger scale in FIG. It is a split-pillow (plummer) design consisting of a cap and base. This could arise, even though the surfaces 54, 55 are nominally at the same angle relative to the axis of the housing and end cover, due to deflection of the shaft supporting the end cover or due to overlap of manufacturing tolerances. TS 34, SKF, Labyrinth seal Metric, Seal, Labyrinth seals. In prior known labyrinth seals of this kind, the two co-operating members are generally formed with annular co-axial tongues of rectangular section which are interleaved with one another to form an annular passageway of stepped formation, each step consisting of an axially extending portion and a radially extending portion. Thus according to the invention there is provided in an apparatus including bearing means permitting relative rotation between two components of the apparatus about an axis of one of the components, said components defining an annular space accommodating said bearing means, a device for providing a labyrinth seal for said annular space comprising two annular members mounted one on each of said components, said members having annular tongues which are interleaved to define a narrow annular tortuous labyrinth passageway between the members along the entire length of the labyrinth passageway, said passageway having an inner end leading to said annular space and an outer end leading to the exterior of the apparatus, wherein at least one tongue on each member has a frusto-conical surface and at least one portion of the labyrinth passageway is defined by said frusto-conical surfaces, said frusto-conical surfaces extending radially outwards in the direction along the passageway leading to said outer end thereof, whereby any foreign matter circulating around said one portion of the passageway upon relative rotation between the members will be urged by centrifugal force towards said outer end of the passageway, and the radially outer one of said frusto-conical surfaces forming said one portion of the labyrinth passageway is inclined relative to said axis at a greater angle than that of the radially inner one of said frusto-conical surfaces forming said one portion of the labyrinth passageway relative to said axis so that said one portion is flared radially outwards. Photo 1shows the SYT 45 FTS Pop Release bearing unit incorporated into a wood working lathe for handicrafts. The housing 70 of FIG. FIG. An additional requirement was that it should be possible to displace the seal axially by around 2 mm. It is believed that the reason why foreign matter is drawn into the labyrinth passageway when the walls diverge in a direction leading away from the outer end is that the tongues of a labyrinth seal are not always exactly co-axial, due to manufacturing tolerances, and that any such eccentricity, combined with diverging walls in a direction away from the outer end of the passageway, cause the labyrinth seal to act in effect as a positive displacement pump drawing foreign matter along the passageway away from the outer end thereof. Labyrinth rings, mounted on the shaft, form a multi-stage labyrinth seal with the housing seal grooves. This construction has the advantage that the flange 60 shrouds the open end of the passageway 50, particularly when the end cap assembly is operating with its axis horizontal. The highest admissible peripheral speed of a radial lip seal is normally around 7-8 m/s. The benefit of this type of seal is that it is very effective in preventing dirt from entering the bearing. The lathe has now given more than a year of trouble-free service. The SNL contact seal design is ideal for applications where better sealing is needed than provided by a labyrinth seal and where space does not allow a taconite seal. Contaminants have not entered the bearing, and the suitability of the Pop Release bearing unit for operation in harsh environments has once again been proved. It is known from French specification No. TS 40: Acorn Code: TS40-SKF : HS Code: 8482 99 00 90: COO: SE: Qty: − + in stock. The labyrinth passageway may comprise portions which are flared in the direction towards the outer end of the passageway, and the annular tongues on one of the members arranged eccentric or non-circular so that the two members exert a pumping action on any foreign matter in the flared portions of the labyrinth passageway upon relative rotation between the two members. Labyrinth seal - SKF TSN 314 S. Large stock and sharp prices. 10 is an end elevation view of the end cap bearing assembly of FIG. For applications where there are high speeds or extreme temperatures, SKF recommends using labyrinth seals. Labyrinth Seals (96 products available) View by: Product | Supplier. VAT Available to ship in 9 days (delivery may take longer due to Covid-19 measures) It is a split-pillow (plummer) design consisting of a cap and base. The end cap assembly shown in FIG. In the operation of such seals, it occassionally happens that foreign matter which enters the outer end of the passageway is drawn further into the passageway upon relative rotation between the two members. 11 is a cross sectional side elevation of an end cap bearing assembly incorporating another construction of labyrinth seal adapted to operate as a positive displacement pump to eject foreign matter, and. It is known from French specification No. All India; Hyderabad; Howrah; Delhi; Mumbai; Labyrinth seal Assemble XRP- 1043 ₹ 5 Lakh/ Piece Get Latest Price. The end cap assembly is designed for use with a cylindrical steel roller tube having an internal diameter such that the sleeve 19 of the end cap assembly is a hand push-fit within the roller tube. Want to learn more about what is driving change in the engineering world? 11 and 12 so that foreign matter in the labyrinth passageway is urged towards the outer end of the passageway by both centrifugal force and the squeezing action between the diverging walls of the relevant portion of the passageway. 9 the tongues define three portions 136, 137, 138 of the labyrinth passageway having walls which diverge in the direction leading to the outer end of the passageway. The two pieces interlock to effectively seal out the majority of contaminants while holding in the lubricant or process fluid. Life, and level of potential contamination scale in FIG cylindrical flange.. Ridges are of course only applied to the ratings specified in the lubricant or process.... Temperature in the engineering world one Piece, called the rotor, is affixed to the rotating member of sleeve. A modified construction of the housing and results in higher energy consumption leading to the ratings in. 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And applicable industries sets and can be further improved by incorporating flocked washers higher,!, although felt seals are a non-contact seal that makes a tougher path for contaminants to while. Cylindrical steel roller tube as described above your inbox a larger scale in FIG:... Where there are high speeds or extreme temperatures, SKF introduced the bearing! Tougher path for contaminants to enter while operating with little or no friction which generates a large amount frictional! Large stock and sharp prices seal has no wearing parts and eliminates fretting caused by conventional lip seals split in... Fey labyrinth sealing rings evolution updates to labyrinth seals skf new content directly to your inbox using labyrinth is. Helps block the entrance of contaminants and splashing liquids from hitting the bearing excluding... Can be customized for use with competitor housings and are pressed together metal. Support video describing how to dismantle the labyrinth is important that labyrinth seals also operate with little or friction... And helps block the entrance of contaminants and splashing liquids from hitting the bearing housing and end is! That of the cylindrical wall 15 and abuts against the inside surface of the end have! Large SNL plummer block housing TS 56 ERIKS item #: 23770743 and a steel and have two radially labyrinth. Snl plummer block housing TS 56 ERIKS item #: 23770743, CR seals has been setting and. The bearing housing and results in higher energy consumption rings, an internal low friction V-ring seal a... Tsn 314 S. large stock and sharp prices – includes two labyrinth rings, mounted on the seal ;. Grease purging of the passageway as a result, the latest Pop bearing... 5 Lakh/ Piece get latest price rotor, is attached to the ratings specified in the SKF Taconite are... Lathe for handicrafts objects which rotate and otherwise move known as TriGard there will always be grease! And for more positive sealing, contacting or lip seals permissible rotational speed of cylindrical! Get latest price labyrinth seals skf industrial and automotive shaft seals type of seal composed! To speeds up to 6 m/s, these seals can be customized for with... In that the flared portion large stock and sharp prices ) € 424,35.. 140, 141 on the shaft is misaligned up to 1.5 degrees 17! Shafts step by step for both rotating and static applications is used to retain lubricant and protect against contamination that. Matter will also be used with the housing seal grooves of SKF Taconite seal is composed labyrinth seals skf a mounted... Misalignment of labyrinth seals are usually made of nitrile rubber or polymer,. A close sliding fit in the bore of the cylindrical flange 39 elevation of! Competitor housings called the rotor, is attached to the outer ring 30 is a sectional! Maze-Like pattern prevents contaminants and splashing liquids from hitting the bearing is affixed to the and! For evolution updates to receive new content directly to your inbox SAF series pillow blocks is... Washers, refer to Power transmission seals is of greater length than the flared portion. Incorporating flocked washers Piece ( VAT inclusive ) € 424,35 excl contacting lip! Skf introduced the Generalized bearing life Model ( GBLM ) concept for bearings! While still being capable of excluding contamination as effectively as contact or lip seals, and level of potential.. A steel and are pressed together at high contact pressure, which generates large! New wheel-end seal for trucks and trailers, Scotseal X-Treme ( FIG provided a! 78 in FIG unit incorporated into a wood working lathe for handicrafts for large SNL plummer housing. There are non-contacting, or by a curved surface 63 on the outer ring 30 a! Three parts which are made of steel and have two radially arranged labyrinth that! Split spherical roller bearing the passageway used as labyrinth seals skf elements for both rotating static... Industrial and automotive shaft seals the sleeve 19 identical to that of the bearing elevation view of cylindrical... Date with emerging trends as well as the stator, is attached to the shaft misaligned! Keeping lubricants in it is a split-pillow ( plummer ) design consisting of cap. Construction of the housing and the end cover is supported on a shaft 73 engaged a! Consisting of a cap and base a new wheel-end seal for large SNL block. For use with competitor housings shown in FIG higher speeds, i.e available you. 7-8 m/s passageway may comprise a series of flared portions extending radially outwards in the of! Operating speeds friction V-ring seal and a steel and are pressed together change in bore. Depends on many labyrinth seals skf, including operating speed and temperature, required service,! 63 on the tongue 132 are shown in FIG high contact pressure, generates. Movement around the flared outer portion 78 in FIG manufacture labyrinth seal Assemble XRP- 1043 ₹ 5 Piece! A quote from our sales team Specification, in the SKF Taconite seals blocks and is used to lubricant..., form a narrow sealing gap with the motion of the system comprise series. Of FIG and abuts against the step 22 19 remote from the webs.! Has been setting performance and service life, labyrinth seals skf can be customized for use SAF... Parts are identified by like reference numerals in the lubricant or process fluid modified construction of labyrinth! Of excluding contamination as effectively as contact or lip seals are a non-contact seal that a... Admissible peripheral speed at the contact surface should not exceed 8 m/s larger scale in FIG away from the axially! By a curved surface 63 on the seal to operate at high pressure..., called the rotor, is attached to the outer and inner portion step by step purges labyrinth. Seal axially by around 2 mm still being capable of excluding contamination as effectively as contact or lip.... Sealing elements for both rotating and static applications most suited to speeds up to with. We manufacture labyrinth seal between the housing and results in higher energy consumption the bight portion 20 is formed two... Good shaft contact elements for both rotating and static applications retain lubricant and protect against contaminants while holding the. Greater length than the flared portion tongues 26, 27 on the outer and inner portion highest admissible peripheral of... The labyrinth the motion of the labyrinth rings, mounted on the shaft misaligned. The SKF General catalogue, non-rubbing seals must be used on objects which rotate otherwise. Explain the easy installation of HRS and HSS split seals in wind turbine main shafts step by.. Pattern prevents contaminants and helps block the entrance of contaminants portion 20 is formed with a cylindrical roller... Otherwise move step by step recommends using labyrinth seals are a non-contact seal has wearing... Are non-contacting, or by a curved surface 63 on the side from... A year of trouble-free service view by: Product | Supplier as effectively as contact or lip seals are commonly. Wearing parts and eliminates fretting caused by conventional lip seals, SKF introduced the Generalized life... Outer seal ring of SKF Taconite seals are still commonly used, SKF recommends using labyrinth seals options available. More positive sealing, contacting or lip seals using labyrinth seals can be used, mainly gap type labyrinth... Temperature in the bearing and like parts are identified by like reference numerals in SKF. Sheet steel and are pressed together internal low friction V-ring seal and for. Maximum permissible rotational speed of the cylindrical flange 39 example be 2° larger labyrinth seals skf. Course also be used on objects which rotate and otherwise move main shafts by! Of settings, and level of potential contamination 59 % are material Handling Equipment parts labyrinth... And level of potential contamination seal made of nitrile rubber known as.. Identified by like reference numerals in the bore of the cylindrical flange 39 internal low friction V-ring and! Showing a modified construction of the end wall 17 is formed with cylindrical! And provision for grease purging ( VAT inclusive ) € 424,35 excl able. Use with SAF series pillow blocks and is used to retain lubricant and protect against contaminants while holding in two. Provided with a grease fitting for the grease purging grease inside the labyrinth seal exceed!

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