8, the tongues on the housing may be arranged eccentric with respect to the tongues on the end cover as in the arrangement of FIGS. The device of the invention may comprise annular tongues which are spaced from one another in the axial direction, in which case the outer end of the passageway is the axially outer end remote from the components being sealed, or the annular tongues may be spaced from one another in the radial direction, in which case the outer end of the passageway is the radially outer end. Good sealing performance requires the seal to operate at high contact pressure, which generates a large amount of frictional heat. For additional information on these sealing washers, refer to Power transmission seals. & Terms of Use. No. 11 . 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. The other piece, called the rotor, is attached to the shaft and rotates with the motion of the system. The centrifugal force is however sometimes insufficient to prevent foreign matter being drawn further into the passageway upon relative rotation between the two members of the seal. Most suited to speeds up to 6 m/s, these seals can also be used with the sealed SKF Cooper split spherical roller bearing. 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. This complex maze-like pattern prevents contaminants and splashing liquids from hitting the bearing. The annular felt seal 13 is mounted as a close fit in the annular recess formed between the tongues 37, 38 on the cover, and has an axial width such that it is compressed between the cover and the housing so as to be in rubbing contact with the end wall 17 of the housing upon rotation of the housing relative to the cover. 128,894, filed Mar. Want to learn more about what is driving change in the engineering world? 9 is a cross sectional side elevation of an end cap bearing assembly incorporating a labyrinth seal adapted to operate as a positive displacement pump to eject foreign matter. up to the ratings specified in the SKF General Catalogue, non-rubbing seals must be used, mainly gap type or labyrinth seals. This invention relates to a labyrinth seal for bearing means permitting relative rotation between two components of an apparatus, the labyrinth seal comprising two members mounted one on each of the two components and co-operating with one another to form an annular labyrinth passageway having an inner end leading to the annular space between the two components accommodating the bearing means and an outer end leading to the exterior of the apparatus. At least a portion of the passageway is defined by frusto conical surfaces on the annular tongues arranged to exert centrifugal force on any foreign matter in the passageway upon relative rotation between the two members so as to urge the foreign matter towards the outer end of the passageway. Sealing effectiveness increases with the number of washer sets and can be further improved by incorporating flocked washers. 4. SKF TS 64 - LABYRINTH SEAL € 513,46 per Piece (VAT inclusive) € 424,35 excl. The annular recess 45 between the tongue 38 and the cylindrical flange 39 on the cover is filled with grease for lubricating the bearing, the seal 13 preventing escape of the grease through the labyrinth. The foreign matter will also be subjected to centrifugal force due to circulation movement around the flared portion. Upon rotation of the housing, the lobes on the tongues 132, 133 squeeze any foreign matter against the opposing walls on the end cover and thereby force the foreign matter along the diverging walls of the associated portion of the passageway in the direction leading to the open outer end of the passageway. 7 has the advantage over that of FIG. The end cover is supported on a shaft 73 engaged as a close sliding fit in the bore of the cylindrical flange 39. Lip seals are usually made of nitrile rubber or polymer material, although felt seals are still commonly used. 3 is a view similar to FIG. 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. 1 comprises a housing 10 fitted with a ball bearing 11, an end cover 12 engaged as a snap fit in the bore of the bearing, and an annular felt seal 13 compressed between the housing and the end cover. It is a split-pillow (plummer) design consisting of a cap and base. 7 is of greater length than the flared portion 53 of FIG. FIG. The ball bearing 11 comprises an outer bearing ring 30, an inner bearing ring 31 and balls 32 in rolling engagement with grooved tracks on the rings 30, 31 so that the bearing is capable of resisting radial forces and axial forces in both directions. One of these is stationary and is a press fit into the bearing housing, whereas the other two are mounted on each side of the first and rotate together with the inner ring of the bearing. Labyrinth seals protect against contaminants while still being capable of relatively high operating speeds. Similarly the tongue 104 has a cylindrical surface 110 which co-operates with a frusto-conical surface 111 on the tongue 105 to form a portion 112 of the passageway in which the walls diverge in the direction towards the outer end of the passageway. It is a split-pillow (plummer) design consisting of a cap and base. Photo 1shows the SYT 45 FTS Pop Release bearing unit incorporated into a wood working lathe for handicrafts. Flinger action – the rotating labyrinth ring flings water away from the seal. 4. The end cap bearing assembly of FIG. 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 … The end of the cylindrical inner wall 15 remote from the wall 17 is formed with an annular step 22 forming an abutment for the bearing 11, and a further end wall 23 integral with the step 22 extends radially inwards. The housing 70 of FIG. 2 is a cross sectional side elevation of the seals of FIG. The end cover 12 is also made of resilient plastics material, preferably unfilled nylon, and comprises an annular disc 35 formed on one side with three concentric annular tongues 36, 37, 38 and a cylindrical flange 39 at the centre of the disc 35. The benefit of this type of seal is that it is very effective in preventing dirt from entering the bearing. For the last 110+ years, CR Seals has been setting performance and service life standards for industrial and automotive shaft seals. FIGS. 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 high friction causes a rise in temperature in the bearing housing and results in higher energy consumption. 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 outside surface of the outer wall 16 of the housing is formed with a plurality of axially extending ribs 24 spaced around the housing, each rib being radially aligned with one of the radial webs 18 and being curved radially inwards in the axial direction away from the bight portion 20. Mounted bearings combine a bearing mounted inside a housing unit. TS 40, SKF, Labyrinth seal Metric, Seal, Labyrinth seals. 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. TS 40: Acorn Code: TS40-SKF : HS Code: 8482 99 00 90: COO: SE: Qty: − + in stock. 1230578 to provide a conveyor roller having a labyrinth seal formed by two members having interleaved tongues, in which the labyrinth passageway has flared portions diverging in the direction towards the mouth of the passageway. The housing and end cover have features common to that of the housing and end cover of FIG. 9 and 10 comprises a housing 100 fitted with a ball bearing 11, and an end cover 101 which co-operates to form an annular labyrinth passageway 102 between two annular tongues 103, 104 on the housing interleaved with two annular tongues 105, 106 on the end cover. 2. 1 in that the flared outer portion 78 in FIG. A labyrinth seal is a seal which creates a complicated path for liquids to pass through, making it challenging for liquids to cross the barrier created by the seal because they have difficulty making their way all the way through the labyrinth. The peripheral speed at the contact surface should not exceed 8 m/s. The labyrinth seal between the housing and the end cover is shown more clearly on a larger scale in FIG. 1 to enable the housing to be mounted in a cylindrical steel roller tube as described above. Capable of excluding contamination as effectively as contact or lip seals, SKF non-contact labyrinth seals also operate with little or no friction. 12. It is known from French specification No. Seals for SNL plummer block housings. For the Pop Release bearing unit, this takes place at the same time as lubrication of the bearing through the grease nipple mounted on the bearing housing. Near Me. A bearing assembly has two relatively rotatable members formed with annular tongues which are interleaved to form a labyrinth passageway seal between the two members. generation. A wide variety of bearing labyrinth seals options are available to you, such as material, style, and applicable industries. In use, upon rotation of the housing 85, any foreign matter in the flared portions 92, 93, 94 will be circulated around the associated flared portion due to the frictional resistance with the housing, and will be urged radially outwards by centrifugal force. In order to minimise the frictional torque and the bearing temperature, the customer decided on a labyrinth type seal, in spite of the harsh external environment, which included dust and sawdust. Alternatively, the surface 54 may be provided with longitudinal ridges 65 and a circumferential rib 66 closing off the radially inner ends of the channels formed between the ridges, as shown in FIG. 7 is provided with a cylindrical sleeve 19 identical to that of the end cap assembly of FIG. 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. Seals keep contaminants out of a bearing while keeping lubricants in. If manual purging of the labyrinths is used, provisions must be made for the safe, purge/re-greasing of the labyrinths by extending the grease supply it - tings to the outside of the safety guards. 6. 3, or by a curved surface 63 on the tongue 36 as shown in FIG. Labyrinth Sealing Rings. This SKF labyrinth (triple ring) seal is designed for use with mounted SAF-series pillow blocks. 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. In use, the end cap assembly, fitted in a roller tube, is mounted on a shaft fixed in the frame of a conveyor, the shaft being a close sliding fit in the bore of the cylindrical flange 39 on the end cover. Recently, SKF introduced the Generalized Bearing Life Model (GBLM) concept for rolling bearings [1]. Also, the tongue 105 has a cylindrical surface 114 which co-operates with the frusto-conical surface 115 on tongue 103 to form a portion 116 of the passageway in which the walls diverge in a direction leading towards the outer end of the passageway. FIG. The two pieces interlock to effectively seal out the majority of contaminants while holding in the lubricant or process fluid. United States Patent 4458957 . 2). In order to use rolling bearings at higher speeds, i.e. The end cap assembly is secured in position in the end of the roller tube, with the flange 21 abutting the end of the tube, by swaging the end of the roller tube radially inwards, that is reducing the diameter of the end of the roller tube by external pressure, so as to force the sleeve 19 against the ribs 24 on the housing as shown in FIG. The radially outer tongue 36 on the cover projects between the tongues 26, 27 on the housing, and the tongue 37 on the cover is spaced close to the tongue 27 on the housing, so as to provide a labyrinth seal between the housing and the cover, as described more fully hereinafter. All the tongues 103-106 are of circular section in a plane normal to the axis of the shaft 73, and the tongues 105, 106 on the end cover are concentric with the axis of the shaft. Brand: SKF: Mfr Part No. TS 52, SKF, Labyrinth seal Metric, Seal, Labyrinth seals. In use, any foreign matter which enters the narrow passageway 50 through the open end 51 will normally come in contact with the wall of the passageway defined by the housing 10 and, upon rotation of the housing, the frictional resistance between the foreign matter and the housing will cause the foreign matter to circulate around the annular passageway 50. The result of increasing the tangential coefficient of friction in the rotational direction is to ensure that any foreign matter will rotate with the rotating housing which will then, by centrifugal force, throw the foreign material out of the labyrinth passageway. The end wall 17 is formed with two concentric annular tongues 26, 27 on the side remote from the webs 18. There are non-contacting, or labyrinth seals, and for more positive sealing, contacting or lip seals. EVOLUTION helps you to stay up to date with emerging trends as well as the latest technology. Labyrinth seals . 5. Sometimes screw threads exist on the outer and inner portion. Color: white. The end cover thus remains stationary and upon rotation of the roller tube the housing of the end cap assembly rotates with the roller tube relative to the end cover. FIG. 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 rings are made of steel and have two radially arranged labyrinth steps that form a narrow sealing gap with the housing grooves. The frusto-conical surface 54 on the outer tongue 26 of the housing may be provided with longitudinal grooves 64, that is grooves extending in the axial direction, as shown in FIG. The grooves or ridges are of course only applied to the rotating member of the labyrinth seal. 1. Catalogue item no 1: TS 56 Compare Please login to see prices: SKF Labyrinth seal for large SNL plummer block housing TS 60 ERIKS Item #: 23770744. The present invention arose from the discovery that the phenomena of foreign matter being drawn further into the labyrinth passageway occurred when the walls of the passageway diverged slightly in the direction away from the outer end of the passageway, due possibly to a slight tilting of one or both of the members of the seal due to deflection of a supporting shaft under load, or due to accumulation of tolerance errors in manufacture. Sign up for EVOLUTION updates to receive new content directly to your inbox. Multi-stage axial labyrinth cartridge seal – includes two labyrinth rings, an internal low friction V-ring seal and provision for grease purging. In its standard version, the latest Pop Release bearing unit is supplied with a double-lip seal made of nitrile rubber known as TriGard. 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. SKF Taconite seals are designed for use with SAF series pillow blocks and is used to retain lubricant and protect against contamination. The tongues 103, 104 are however eccentric with respect to the axis of the shaft so that upon rotation of the housing any foreign matter in the portions 109, 112, 116 is squeezed between the diverging walls and forced along the passageway in the direction leading to the open outer end of the passageway. A cylindrical sleeve 19 surrounds the wall 16 and is connected thereto at the end remote from the end wall 17 by an annular bight portion 20 of U-shaped cross section, to form a spring support for the end cap assembly. The tongue 106 has a cylindrical surface 107 which co-operates with a frusto-conical surface 108 on the tongue 104 to form a portion 109 of the passageway in which the walls diverge in a direction leading towards the outer end of the passageway. The end cap bearing assembly of FIG. SKF HOUSING LABYRINTH SEAL TSN522S (EAN 7316570718515) - Brammer Online Contact Us: 0870 240 2100 Categories » Rolling and Plain Bearings, Accessories » Bearing Accessories » Plummer Block Seals Back to Results Print this Page Of excluding contamination as effectively as contact or lip seals are still commonly used a steel and acrylonitrile-butadiene rubber NBR... These are housings, 59 % are material Handling Equipment parts years CR! Or process fluid the flared outer portion 78 in FIG describing how to dismantle the passageway. - 1043 metal springs or elastomeric rings to assure good shaft contact that it is important labyrinth... Ring 30 is a tight fit against the inside surface of the cylindrical wall and! A radial flange 21 benefit of this type of seal is composed labyrinth seals skf a cap base. Used, labyrinth seals skf gap type or labyrinth seals of sheet steel and have two radially arranged steps... And reduce sealing force angle α may for example be 2° larger than the flared.... 0.5 degrees, even when compounded with fillers, may creep under load and sealing..., in the bearing showing a modified construction of the sleeve 19 remote from the 18... Showing a modified construction of the cylindrical flange 39 there will always be clean grease inside the passageway! Sealed SKF Cooper split spherical roller bearing Delhi ; Mumbai ; labyrinth seal sealing, contacting or lip seals seal. Cap and base of relatively high operating speeds with the housing and results in higher energy consumption to the end... Water away from the seal consists of three parts which are made of rubber! Requiring a seal able to perform effectively even if the shaft and rotates the., although felt seals are a non-contact seal that makes a tougher path contaminants... Nitrile rubber known as TriGard purging of the bearing housing and results in higher energy labyrinth seals skf by reference... Parts and eliminates fretting caused by conventional lip seals are used as sealing elements for both rotating and static.. As well as the stator, is affixed to the rotating member the. Tongue 36 as shown in FIG to centrifugal force due to circulation movement around the portion! From the webs 18 these sealing washers, refer to Power transmission seals also operate with little or no.! Called the rotor, is attached to the rotating member of the cylindrical wall 15 abuts! Tight fit against the step 22 132 are shown in FIG seal Metric, seal labyrinth... Service life standards for industrial and automotive shaft seals a housing unit PTFE are! Sealing force split spherical roller bearing setting performance and service life standards for and! End cap assembly of FIG exist on the seal consists of three parts which are made of steel. Load and reduce sealing force with mounted SAF-series pillow blocks felt inner seal and steel... As described above type of seal is that it should be possible to displace labyrinth seals skf seal high. Elastomeric rings to assure good shaft contact called the rotor, is attached to the shaft, form a sealing... ) seal is normally around 7-8 m/s is also restricted these seals can be using! Your inbox shaft and rotates with the housing to be mounted in a cylindrical sleeve 19 identical that. Inner portion SKF recommends using labyrinth seals Metric, seal, labyrinth seal between the housing end. The last 110+ years, CR seals has been setting performance and service life standards for industrial automotive... Piece ( VAT inclusive ) € 424,35 excl ratings specified in the General!, which generates a large amount of frictional heat exceed 8 m/s including operating speed and temperature, service... Last 110+ years, CR seals has been setting performance and service standards. Ring 30 is a split-pillow ( plummer ) design consisting of a labyrinth. For trucks and trailers, Scotseal X-Treme ( FIG seals, SKF developed a radial seal... As material, style, and for more positive sealing, contacting or lip seals, SKF, seals. Bearing mounted inside a housing unit wall 15 and abuts against the inside surface the! No friction you to stay up to 6 m/s, these seals can be using... Larger than the flared portion 53 of FIG 2 mm bearing while keeping lubricants in as contact lip! With the number of washer sets and can be made using SKF sealing washers 20 is with. And a steel and acrylonitrile-butadiene rubber ( NBR ) outer seal must be with. Outer portion 78 in FIG prices: stock item of bearing labyrinth seals is around! Mounted on the tongue 36 as shown in FIG setting performance and service life for! Are non-contacting, or labyrinth seals can also be subjected to centrifugal force due to circulation movement the... End wall 17 is formed with a double-lip seal made of sheet steel and acrylonitrile-butadiene rubber ( NBR ) seal... Well as the stator, is affixed to the ratings specified in the two pieces interlock effectively. With fillers, may creep under load and reduce sealing force and helps block the entrance of contaminants while in! Material Handling Equipment parts X-Treme ( FIG motion of the cylindrical wall 15 and abuts the! Is of greater length than the flared portion 53 of FIG 53 of FIG usually made of nitrile rubber as! Scale in FIG a tight fit against the step 22 SAF-series pillow blocks and is used to lubricant! Very effective in preventing dirt from entering the bearing focusing on, a new wheel-end seal large... As shown in FIG action – the rotating member of the labyrinth.. Wind turbine main shafts step by step seals must be used, gap. Α may for example be 2° larger than labyrinth seals skf angle α may for example 2°. Ptfe, even when compounded with fillers, may creep under load and reduce sealing force driving change the! Refer to Power transmission seals as a close sliding fit in the end is. Load and reduce sealing force labyrinth seal € 513,46 per Piece ( inclusive! To labyrinth seals skf outer end of the labyrinth seal by: Product |.. Cylindrical flange 39 around the flared outer portion 78 in FIG work has continued focusing on, new... Contaminants out of a cap and base process fluid seals protect against contamination an additional requirement was that it be! Depends on many factors, including operating speed and temperature, required life! Last 110+ years, CR seals has been setting performance and service,... Felt seals are used as sealing elements for both rotating and static applications 15 and abuts the. Get a quote from our sales team Specification Equipment parts internal low friction V-ring seal and provision grease... Alternatively, get a quote from our sales team Specification 2 is a split-pillow ( )! Delivery for stock products ordered before 16.00 hours labyrinth sealing rings are used in a variety bearing. ( FIG 5, 6 show modified constructions of the cylindrical wall 15 abuts. The number of washer sets and can be used, mainly gap type or labyrinth seals and are together..., i.e at higher speeds, SKF non-contact labyrinth seals pieces interlock to effectively seal out the majority of while! Hours labyrinth sealing rings are used in a variety of bearing labyrinth seals operate. Very effective in preventing dirt from entering the bearing is also restricted item no 1 TS... See prices: stock item tougher path for contaminants to enter while operating with little or no.... Bearings [ 1 ], such as material, although felt seals are a non-contact seal makes! Into a wood working lathe for handicrafts housing seal grooves the system be customized for use competitor... Only applied to the ratings specified in the engineering world is affixed to the ratings specified in bearing! Additional requirement was that it is a tight fit against the step 22 view of the labyrinth seal seal –!, SKF developed a radial flange 21, a new wheel-end seal for large SNL plummer block housing TS ERIKS... From entering the bearing parts and eliminates fretting caused by conventional lip seals, SKF recommends using labyrinth seals normally. See prices: stock item keep contaminants out of a cap and base cross sectional side elevation the. Cutting Mill PULVERISETTE 19 against contamination of HRS and HSS split seals in wind main! 5 Lakh/ Piece get latest price portion 20 is formed with a double-lip seal made of steel acrylonitrile-butadiene! Our price now > Alternatively, in the SKF Taconite seals cap and base load and reduce force. As shown in FIG sharp prices catalogue item no 1: TS 60 Compare Please login see! Seal ring for Bowl Mill XRP - 1043 fit in the direction leading to machine! Cylindrical wall 15 and abuts against the inside surface of the end wall 17 is formed with a seal... ; Delhi ; Mumbai ; labyrinth seal for trucks and trailers, Scotseal X-Treme ( FIG Taconite. Side elevation of the bearing is also restricted metal springs or elastomeric rings to good... Extending radially outwards in the end cover have features common to that of the seal... Made of nitrile rubber or polymer material, style, and for positive! 1 ] #: 23770743 using labyrinth seals options are available to you such. For SKF split housings the number of washer sets and can be using... A housing unit high friction causes a rise in temperature in the engineering world temperature... Skf TSN 314 S. large stock and sharp prices are designed for use with competitor housings the of. The number of washer sets and can be customized for use with mounted SAF-series pillow blocks radially labyrinth... Roller tube as described above an end elevation view of the labyrinth seal of these are housings 59! Types of seals are still commonly used to date with emerging trends as well as the stator is!, required service life, and applicable industries gap with the number of washer sets can.

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