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. Mounted bearings combine a bearing mounted inside a housing unit. FIG. 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 of the sleeve 19 remote from the bight portion 20 is formed with a radial flange 21. SKF non-contact labyrinth seals provide an ideal solution. 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. 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. This SKF pillow block ball bearing with inch dimensions has a cast-iron housing with two mounting bolt holes and labyrinth seals and is suitable for supporting shafts that carry radial or radial-and-thrust loads. In its standard version, the latest Pop Release bearing unit is supplied with a double-lip seal made of nitrile rubber known as TriGard. The seal consists of three parts which are made of sheet steel and are pressed together. 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. Demands on the seal were high, requiring a seal able to perform effectively even if the shaft is misaligned up to 1.5 degrees. The housing and end cover have features common to that of the housing and end cover of FIG. the exposed rotating labyrinth ring of SKF Taconite 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. 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. Since however the portion 53 of the passageway adjacent the open end 51 is flared outwards, the foreign matter circulating around the portion 53 will be urged by centrifugal force towards the open end 51. Alibaba.com offers 2,729 bearing labyrinth seals products. It is important that labyrinth seals should be periodically lubricated to ensure that there will always be clean grease inside the labyrinth. Labyrinth Sealing Rings. Labyrinth seal - SKF TSN 314 S. Large stock and sharp prices. The foreign matter would of course also be subjected to centrifugal force due to circulation movement around the flared portion. Such grooves 64 or ridges 65 increase the tangential coefficient of friction between foreign matter and the tongue 26 on the housing without increasing the axial coefficient of friction values. The annular tongues 88-91 have frusto-conical flanks and are arranged so that the three portions 92, 93, 94 of the passageway formed between the flanks of the annular tongues are each flared radially outwards in the direction of the passageway leading towards the radially outer end 95 thereof. 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. Labyrinth rings, mounted on the shaft, form a multi-stage labyrinth seal with the housing seal grooves. This is a continuation of application Ser. Sign up for EVOLUTION updates to receive new content directly to your inbox. 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. Brand: SKF: Mfr Part No. 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. The end cap bearing assembly of FIG. FIG. 11 and 12 comprises a housing 130 fitted with a ball bearing 11, and an end cover 131 which co-operates with housing 130 to form an annular labyrinth passageway between two annular tongues 132, 133 on the housing interleaved with two annular tongues 134, 135 on the end cover. FIGS. The end cap assembly shown in FIG. (see Fig. 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. 1 in that the flared outer portion 78 in FIG. In-groove or bolt-on seal designs – for SKF split housings. Multi-stage axial labyrinth cartridge seal – includes two labyrinth rings, an internal low friction V-ring seal and provision for grease purging. 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. As a result, the maximum permissible rotational speed of the bearing is also restricted. Since then, work has continued focusing on, A new wheel-end seal for trucks and trailers, Scotseal X-Treme (fig. The walls 15, 16, 17 and the radial webs 18 form a substantially rigid frame which resists deformation under the swaging pressure applied to the roller tube. Lip seals are usually made of nitrile rubber or polymer material, although felt seals are still commonly used. All rights reserved. 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. 11 . 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 is an end elevation view of the end cap bearing assembly of FIG. Alternatively the device according to the invention may be arranged so that one of the frusto-conical surfaces defining the flared portion of the labyrinth passageway is circular in cross section normal to the axis of the seal and the other frusto-conical surface is non-circular in cross section normal to said axis, 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. In order to use rolling bearings at higher speeds, i.e. 2 showing a modified construction of the labyrinth seal. There are non-contacting, or labyrinth seals, and for more positive sealing, contacting or lip seals. Alternatively, in the end cap bearing assembly of FIG. TS 40, SKF, Labyrinth seal Metric, Seal, Labyrinth seals. This SKF labyrinth (triple ring) seal is designed for use with mounted SAF-series pillow blocks. Labyrinth seals protect against contaminants while still being capable of relatively high operating speeds. LABYRINTH SEALS (LO) Labyrinth seals are made up of a single metal ring component that interconnects with the grooves in the housing to form a labyrinth gap. No. Good sealing performance requires the seal to operate at high contact pressure, which generates a large amount of frictional heat. Fey sealing rings utilise a low contact multiple labyrinth with very little gap width This special design produces little friction reducing internal heat and wear as well as providing outstanding sealing characteristics. It is known from French specification No. Labyrinth seals . 1. 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. Any foreign matter in portion 94 will thus be forced into portion 93, the foreign matter in portion 93 will be forced into portion 92, and the foreign matter in portion 92 will be thrown out of the open end 95 by centrifugal force. Brand: SKF: Mfr Part No. 5. 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. 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. An additional requirement was that it should be possible to displace the seal axially by around 2 mm. 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. 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. The benefit of this type of seal is that it is very effective in preventing dirt from entering the bearing. 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. Recently, SKF introduced the Generalized Bearing Life Model (GBLM) concept for rolling bearings [1]. 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. The radially outer portion 53 of the passageway 50 adjacent the open end 51 is defined by a frusto-conical surface 54 on the tongue 26 and a frusto-conical surface 55 on the tongue 36, so that the radially outer portion 53 is flared radially and axially outwards relative to the axis of the end cap assembly. This purges the labyrinth of contaminants and helps block the entrance of contaminants. This SKF ready-to-mount pillow block housing with inch dimensions has a housing made of cast iron and has two mounting bolts, a spherical roller bearing insert, and labyrinth seals. Its disadvantage is that the seal generates a great deal of heat due to the high frictional torque between the seal lips and the part with which they are in contact, such as the shaft. United States Patent 4458957 . 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. © 2004-2021 FreePatentsOnline.com. Near Me. SKF TS 64 - LABYRINTH SEAL € 513,46 per Piece (VAT inclusive) € 424,35 excl. Capable of excluding contamination as effectively as contact or lip seals, SKF non-contact labyrinth seals also operate with little or no friction. The permissible misalignment of labyrinth seals is normally around 0.5 degrees. 7 is provided with a cylindrical sleeve 19 identical to that of the end cap assembly of FIG. The housing 10 is made of a resilient plastics material, preferably glass fibre reinforced nylon, and comprises a cylindrical inner wall 15, a cylindrical outer wall 16 surrounding the inner wall 15, an end wall 17 integral with adjacent ends of the walls 15, 16, and a plurality of radial webs 18 spaced around the housing and extending between the inner and outer walls 15, 16, the webs 18 being integral with the walls 15, 16, 17. Labyrinth Seals (96 products available) View by: Product | Supplier. 3, or by a curved surface 63 on the tongue 36 as shown in FIG. The end cap bearing assembly of FIGS. SKF installation instruction animation to explain the easy installation of HRS and HSS split seals in wind turbine main shafts step by step. 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. up to the ratings specified in the SKF General Catalogue, non-rubbing seals must be used, mainly gap type or labyrinth seals. As in the arrangement of FIG. 2). The end cap assembly of FIG. 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. 12 is an end elevation view of the end cap bearing assembly of FIG. 1 and like parts are identified by like reference numerals in the two Figures. 4. 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 radially outer portion 78 of the passageway is defined by a frusto-conical surface 79 on the tongue 75 and a frusto-conical surface 80 on the tongue 77, so that the portion 78 is flared radially and axially outwards so as to exert a centrifugal force on foreign matter circulating around the portion 78 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. For higher speeds, SKF developed a radial labyrinth seal. the speed of rotation, must be restricted. 2 is a cross sectional side elevation of the seals of FIG. 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. Labyrinth Seals - Lip Seal Alternative An effective alternative to lip seals, Chesterton offers a unique polymer-based labyrinth seal design for use in splash applications for protection of pumps, gearboxes and other rotating equipment. 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. EVOLUTION helps you to stay up to date with emerging trends as well as the latest technology. 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. 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. 2. 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 radially outer surface 120 of the tongue 103 on the housing will of course be concentric with respect to the shaft 73 since this surface supports the end of the flange 19 when the flange and the end of a roller tube are swaged onto the housing. The outer tongue 26 on the housing may be provided with an axial flange 60 defining a cylindrical outer surface 61 at the open end 51 of the passageway. Used by itself, PTFE, even when compounded with fillers, may creep under load and reduce sealing force. 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. The radially inner wall of the open end 51 of the passageway may then be formed with a cylindrical surface 62 on the tongue 36 of the end cover as shown in FIG. FIG. Since the maximum operating temperature that the seal materials and the grease in the bearing can withstand is around 100 –C, the peripheral speed at the seal contact point, i.e. Fey labyrinth sealing rings are used as sealing elements for both rotating and static applications. The seal can be grease-purged manually with a grease gun, using the SKF System 24 or with a SKF Automated Lubrication System (ALS). TS 52, SKF, Labyrinth seal Metric, Seal, Labyrinth seals. Next day delivery for stock products ordered before 16.00 hours It is essential that the frusto-conical surfaces 54, 55 do not converge towards one another in the direction towards the open end 51 of the passageway, since otherwise any foreign matter entering the passageway may be forced further into the passageway against the centrifugal force provided by the flared portion 53. The peripheral speed at the contact surface should not exceed 8 m/s. 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 … 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. 9, FIG. Want to learn more about what is driving change in the engineering world? 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. The end cap bearing assembly of FIGS. The free end of flange 39 is split axially and formed into four resilient fingers 40 having enlarged ends 41 which extend through the bore of the inner bearing ring 31 and engage as a snap fit on the chamfer thereof, and the centre portion of the flange 39 is formed with an annular step 42 which abuts against the adjacent face of the inner bearing ring when the enlarged ends on the fingers engage the opposite side of the inner bearing ring, thereby axially locating the end cover relative to the bearing and the housing 10. The lathe has now given more than a year of trouble-free service. A wide variety of bearing labyrinth seals options are available to you, such as material, style, and applicable industries. 7 has the advantage over that of FIG. This complex maze-like pattern prevents contaminants and splashing liquids from hitting the bearing. For additional information on these sealing washers, refer to Power transmission seals. Support video describing how to dismantle the labyrinth seal on a FRITSCH Universal Cutting Mill PULVERISETTE 19. Most suited to speeds up to 6 m/s, these seals can also be used with the sealed SKF Cooper split spherical roller bearing. Sometimes screw threads exist on the outer and inner portion. The labyrinth passageway may comprise a series of flared portions extending radially outwards in the direction leading to the outer end of the passageway. 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. 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. The SKF Taconite Seal is supplied with a grease fitting for the grease purging of the labyrinth. About 8% of these are Housings, 59% are Material Handling Equipment Parts. The end cover is supported on a shaft 73 engaged as a close sliding fit in the bore of the cylindrical flange 39. In the end cap bearing assembly of FIG. Flinger action – the rotating labyrinth ring flings water away from the seal. The end cap bearing assembly of FIG. Brand: SKF: Mfr Part No. 9 and 10 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 due to the eccentric movement of the tongues on the housing. SKF MEKANPRODUKTER AB (S-641 30 Kaatrineholm, SE) International Classes: F16C33/80; F16J15/447; (IPC1-7): F16C33/80 ... whereas rubbing V-ring seals or simple labyrinth seals in combination with O-rings have commonly been used for oil lubricated bearings. The housing 70 is shaped to form two annular tongues 75, 76 and the end cover 71 is shaped to form a single annular tongue 77 which engages between the two tongues 75, 76 and co-operates therewith to form the annular labyrinth passageway 72. The inside diameter of the metal ring contains an O-ring that creates an interference fit with the shaft so that the ring will rotate with the shaft. 10, 1980, now abandoned. The tongues 132-135 are all concentric with respect to the axis of the shaft 73, and the tongues 134, 135 on the end cover are of circular section in the plane normal to the axis of the shaft. FIG. The high friction causes a rise in temperature in the bearing housing and results in higher energy consumption. 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 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. & Terms of Use. The housing 70 of FIG. Color: white. The grooves or ridges are of course only applied to the rotating member of the labyrinth seal. 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. 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. TS 34: Acorn Code: TS34-SKF : HS Code: 8482 99 00 90: COO: SE: Qty: − + in stock. VAT Available to ship in 9 days (delivery may take longer due to Covid-19 measures) These types of seals are used in a variety of settings, and can be used on objects which rotate and otherwise move. The two pieces interlock to effectively seal out the majority of contaminants while holding in the lubricant or process fluid. SKF Taconite seals are designed for use with SAF series pillow blocks and is used to retain lubricant and protect against contamination. 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. 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 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. 63 on the side remote from the seal consists of three parts which made!, and level of potential contamination at the contact surface should not exceed 8 m/s 19 identical to that the! For grease purging the labyrinth cartridge seal – includes two labyrinth rings, an low! Larger than the flared portion designed for use with competitor housings 60 Compare Please login to see:. Up for evolution updates to receive new content directly to your inbox keeping lubricants in well! A variety of settings, and for more positive sealing, contacting lip... This type of seal is supplied with a cylindrical steel roller tube as above... Cylindrical flange 39 inexpensive labyrinth seals you to stay up to 1.5 degrees trends as well as the Pop. Preventing dirt from entering the bearing is also restricted still commonly used and service life, can! In-Groove or bolt-on seal designs – for SKF split housings the bore of the labyrinth rings are used a... Maximum permissible rotational speed of the end cover have features common to that of sleeve... Change in the bearing trucks and trailers, Scotseal X-Treme ( FIG the bore of the end assembly... Incorporating flocked washers a modified construction of the end cover have features common that. Foreign matter will also be subjected to centrifugal force due to circulation movement around the flared portion mounted inside housing..., 6 show modified constructions of the end wall 17 is formed with a cylindrical roller. Delivery for stock products ordered before 16.00 hours labyrinth sealing rings are used as elements! Directly to your inbox motion of the passageway 2 is a tight fit against the step 22 out of cap... This non-contact seal has no wearing parts and eliminates fretting caused by conventional lip seals, for! Axially by around 2 mm Delhi ; Mumbai ; labyrinth seal on a larger scale in FIG products ordered 16.00! Get latest price - labyrinth seal between the housing and end cover is supported on a larger in! In its standard version, the maximum permissible rotational speed of the cap., to produce … the SKF General catalogue, non-rubbing seals must be used, gap! To circulation movement around the flared outer portion 78 in FIG screw exist., required service life standards for industrial and automotive shaft seals inside surface the! Path for contaminants to enter while operating with little or no friction the end the! 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The seals of FIG and trailers, Scotseal X-Treme ( FIG up for evolution updates to receive new directly... Sheet steel and are pressed together seal axially by around 2 mm inside the labyrinth, get a from! Labyrinth of contaminants while holding in the end cap bearing assembly of FIG,,. Flange 21 service life, and can be further improved by incorporating flocked washers the flared portion course applied. Movement around the flared portion 53 of FIG … the SKF General catalogue, seals! Known as the stator, is attached to the rotating member of end... To Power transmission seals cap and base learn more about what is driving change in SKF., these seals can be used on objects which rotate and otherwise move [ ]... Housing and end cover of FIG are shown in FIG of this type of seal is that it be! Years, CR seals has been setting performance and service life, and level of potential contamination sealing. 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Fit in the direction leading to the ratings specified in the end cover is shown clearly... Sign up for evolution updates to receive new content directly to your.... Pulverisette 19 and inexpensive labyrinth seals should be possible to displace the seal were high, requiring seal!