What is a Labyrinth Seal? 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. It is known from French specification No. 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. 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. 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. 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. 7 is of greater length than the flared portion 53 of FIG. Fey labyrinth sealing rings are used as sealing elements for both rotating and static applications. 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. Demands on the seal were high, requiring a seal able to perform effectively even if the shaft is misaligned up to 1.5 degrees. 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 labyrinth seal between the housing and the end cover is shown more clearly on a larger scale in FIG. 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. 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. 11 . The end cap assembly shown in FIG. 1 is a cross sectional side elevation of an end cap bearing assembly having a labyrinth seal adapted to throw out foreign matter by centrifugal force, and a felt seal closing the inner end of the labyrinth seal. 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. 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 end cap bearing assembly of FIG. 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. In its standard version, the latest Pop Release bearing unit is supplied with a double-lip seal made of nitrile rubber known as TriGard. 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. Seals keep contaminants out of a bearing while keeping lubricants in. Labyrinth seals that do not contact the shaft depend on a tortuous interface, fluid surface tension, and a pump-like design to prevent leakage. the exposed rotating labyrinth ring of SKF Taconite Seals. The end wall 17 is formed with two concentric annular tongues 26, 27 on the side remote from the webs 18. Effective and inexpensive labyrinth seals can be made using SKF sealing washers . 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. 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. 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. 1. 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. 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. Catalogue item no 1: TS 60 Compare Please login to see prices: Stock item. 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. Labyrinth seals are a non-contact seal that makes a tougher path for contaminants to enter while operating with little or no friction. 2 which shows the annular tongues 26, 27 on the housing interleaved with the annular tongues 36, 37 on the end cover to form a narrow tortuous annular passageway 50, the radially outer end 51 of which is open and the radially inner end 52 of which is closed by the felt seal 13. The benefit of this type of seal is that it is very effective in preventing dirt from entering the bearing. Brand: SKF: Mfr Part No. 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. 4. Seals can be customized for use with competitor housings. 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. Cylindrical flange 39 material, style, and can be customized for use with SAF series pillow blocks is. Flings water away from the webs 18 labyrinth seals and protect against contamination item no:. 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