WO2008138281A1 - Sealing arrangement for a rolling bearing - Google Patents

Sealing arrangement for a rolling bearing Download PDF

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Publication number
WO2008138281A1
WO2008138281A1 PCT/DE2007/001112 DE2007001112W WO2008138281A1 WO 2008138281 A1 WO2008138281 A1 WO 2008138281A1 DE 2007001112 W DE2007001112 W DE 2007001112W WO 2008138281 A1 WO2008138281 A1 WO 2008138281A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
sealing
arrangement according
rolling bearing
sealing arrangement
Prior art date
Application number
PCT/DE2007/001112
Other languages
German (de)
French (fr)
Inventor
Ernst Masur
Etienne Rueff
Gottfried Ruoff
Original Assignee
Schaeffler Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Kg filed Critical Schaeffler Kg
Publication of WO2008138281A1 publication Critical patent/WO2008138281A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6622—Details of supply and/or removal of the grease, e.g. purging grease
    • F16C33/6625—Controlling or conditioning the grease supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
    • F16C33/667—Details of supply of the liquid to the bearing, e.g. passages or nozzles related to conditioning, e.g. cooling, filtering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
    • F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race
    • F16C33/7856—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race with a single sealing lip

Definitions

  • the invention relates to a sealing arrangement for a grease-lubricated rolling bearing, with at least one bearing outer ring, at least one bearing nenring and between the same run in rolling elements, wherein the roller bearing is assigned at least one end side at least one, a stiffening ring having sealing disc such that only further lubricant , preferably lubricating oil, can penetrate in small quantities from the outside into the rolling bearing.
  • magnetic fluid seals are known, by means of which, for example, rolling bearings of spindle motors for disk storage should be as tight as possible in order to effectively prevent the escape of lubricating oil from the bearings in a clean air space.
  • this type of sealing arrangement consists of two metal disks spaced apart from one another, between which a permanent magnet disk is arranged. Radially inside a gap is formed, which in turn is filled by ferromagnetic fluid. The ferromagnetic fluid is held in position by the permanent magnet.
  • US Pat. No. 4,948,277 A discloses an annular, rotating seal with integrated magnetic encoder, in particular for rolling bearings with transducers, and with a lip seal set between two rings into which the transducers and the encoder are inserted , With such a seal, the whole of the transmitter with the associated encoder is to be isolated from contamination outside and inside the bearing.
  • EP 1 159 542 B1 discloses a magnetic seal arrangement for rolling bearings for the greatest possible sealing thereof with a so-called dynamic sealing means in the form of a sealing lip of a sealing ring, which is pressed against a corresponding support surface by means of magnetic forces.
  • a magnetic disc or an encoder is arranged on a rotating armor whose magnetic field lines act on a ferromagnetic ring of the sealing ring.
  • the sealing ring has a thinned cross section, which allows the pressing movement of the sealing lip against the support surface.
  • rolling bearings for oil-lubricated motor vehicle transmissions are known, which are used under the name "Clean Bearing” by means of special seals as sealed, grease-lubricated bearings, in particular as main shaft bearings (cf "Die Wälzlagerpraxis", Bäderlein, Eschmann, Hasbargen, Weigand, vernier suverlage GmbH, Mainz, 2002, 3rd edition, p. 389 - 390).
  • These seals have the task of protecting the rolling bearing against contamination, such as abrasion, wear and other impurities.
  • the invention has the object of developing a seal assembly for a grease-lubricated bearings such that on the one hand the inflow of other lubricant, in particular of oil, although in small quantities in the rolling bearing is possible, but on the other hand with simple and inexpensive means the simultaneous penetration of Dirt and metallic particles in the bearing inside is effectively prevented. Summary of the invention
  • the invention is based on the finding that when using a generic rolling bearing in a transmission in the same disturbing and therefore fernetzhaltenden particles consistently consist of such metals that can be pulled out by means of a magnet from the penetrating into the rolling bearing oil flow. Accordingly, it is sufficient for the solution of the task per se to arrange a magnet on the roller bearing such that in the leading into the rolling bearing oil particles metal particles are deposited on this magnet.
  • the invention is therefore based on a seal assembly for a grease-lubricated roller bearing, with at least one bearing outer ring, at least one bearing inner ring and between see the same run in rolling elements, wherein the rolling bearing on at least one end face at least one, a stiffening ring having gasket is assigned such that only further lubricant, preferably lubricating oil, can penetrate in small amounts from the outside into the rolling bearing.
  • This sealing arrangement is additionally characterized in that the sealing disc has at least one permanent-magnetic means for detaching ferromagnetic particles from the further lubricant and / or from the grease already present in the rolling bearing and for fixing the ferromagnetic particles directly to the sealing disc or adjacent thereto.
  • the permanent magnetic means may be formed by the stiffening ring of the sealing disc, which at least in selected areas of a permanent magnetic
  • the stiffening ring can be connected to the sealing disc or arranged thereon such that at least one end face of the stiffening ring is in direct contact with the adjacent medium inside or outside of the bearing in the form of lubricating oil and / or lubricating grease.
  • stiffening ring may also be connected to the sealing disc in such a way that direct contact with the adjacent medium located inside and / or outside of the bearing in the form of lubricating oil and / or lubricating grease is avoided.
  • the permanent magnetic means may also be formed by the sealing disk itself, which consists of a permanent magnetic material at least in selected areas or has permanent magnetic components.
  • the permanent magnetic means may be formed by a magnetic element which is fixed to the sealing disc.
  • a magnetic element which is fixed to the sealing disc.
  • Commercially available permanent magnets for example magnets based on neodymium-iron-boron (NdFeB), come into consideration as the magnetic element.
  • NdFeB neodymium-iron-boron
  • Such magnetic elements are physically small, in large numbers inexpensive commercially available, so that there is the advantage of retrofitting existing seals by simply supplementing the seal with the magnetic element.
  • the attachment of the magnetic element to the seal by gluing for example by means of a commercial adhesive, can be carried out quickly and easily.
  • the magnetic element is adhesively secured to the stiffening ring of the seal, resulting in the advantage that the stiffening ring provides the magnetic element with a rigid base. Furthermore, it proves to be advantageous that the metallic stiffening ring Screen of the magnetic element shields and prevents leakage of the magnetic field in the area outside the camp. If the magnetic field exits the region of the bearing at least partially outwards, for example into the region of the supply line of the lubricant, there is a risk that the magnetic field will transfer ferromagnetic particles into the region of the bearing, that is between the inner ring and the inner ring the outer ring located area in which the rolling elements are, pulls.
  • the stiffening ring and / or the sealing disc can have one or more axial recesses or pockets for receiving adhering ferromagnetic particles.
  • single row or multi-row roller bearings may be formed in the form of a fixed bearing or a floating bearing with the seal assembly according to the invention.
  • a sealing arrangement is particularly suitable for dirt-protected rolling bearings of a motor vehicle transmission.
  • FIG. 1 is a partial axial section through an equipped with a seal assembly according to the invention rolling bearing, 2 shows the detail "Z" according to FIG. 1 in the form of a sealing disk of the sealing arrangement, FIG.
  • Fig. 10a the sealing disc according to the third embodiment in a sectional view taken along the line B-B of Fig. 9, and
  • FIG. 10b shows the sealing disk from FIG. 10a with an enlarged view of the section "Z" in FIG.
  • Fig. 1 shows a single-row roller bearing 1 in the form of a grease-lubricated deep groove ball bearing, which is installed for example in a motor vehicle transmission not shown in detail.
  • this rolling bearing 1 has a bearing outer ring 2, a bearing inner ring 3 and between the same in raceways 4, 5 of the bearing rings 2, 3 guided rolling elements 6.
  • the rolling bearing 1 is sealed at its two end faces by means of a respective sealing disk 7, which is manufactured using a non-metallic material.
  • the sealing discs 7 have sealing lips 8 and 9, which at the radial inner circumferential surface of the bearing outer ring 2 or 3 sealingly abut against the radially outer surface of the bearing inner ring 3.
  • the radially outer sealing lip 8 has at least one ventilation groove 10 (see FIGS. 2 and 3), via which oil can penetrate from the outside into the rolling bearing 1 and can flow out of it.
  • the sealing disk 7 is supported by a stiffening ring 11, which is preferably connected to the sealing disk 7 by positive locking, for example, snapped into the same or cast in the manufacture of a sealing disc 7 made of plastic or vulcanized to this.
  • a stiffening ring 11 which is preferably connected to the sealing disk 7 by positive locking, for example, snapped into the same or cast in the manufacture of a sealing disc 7 made of plastic or vulcanized to this.
  • any other known joining measures, such as gluing are applicable and accordingly covered by the invention.
  • the ventilation groove 10 on the radially outer sealing lip 8 of the sealing disc 7 is designed according to the requirement for low friction, good lubrication and the retention of dirt particles. Although, as already mentioned, a narrow ventilation and venting groove 10 permits the penetration and outflow of further lubricant, in this case gear oil, into the roller bearing 1 from the outside in small amounts, but retains particles.
  • the sealing disc 7 according to the invention, at least one permanent magnetic means for dissolving out the ferromagnetic particles from the other lubricant, in this case the transmission oil, and / or the in the rolling bearing 1 already located grease and for fixing these particles directly on the sealing disc 7 or adjacent to the same.
  • the permanent magnetic means is formed by the stiffening ring 11 itself, which consists at least in selected areas of a permanent magnetic material or permanent magnetic components.
  • Permanent magnet materials are widely known. For example, steel, ferrites, aluminum-nickel-cobalt (AINiCo) compounds, samarium-cobalt (SmCo) compounds or neodymium-iron-boron (NdFeB) compounds, for example also bound in plastic, can be used. It is further understood that from the aforementioned compounds exemplified also the magnetic element may exist, which has been proposed as a further embodiment of the magnetic means as a third embodiment (Fig. 9, 10a, 10b).
  • FIGS. 4 and 5 show that the magnetic stiffening ring 11 is connected to the sealing disk 7 or arranged thereon such that at least one end face of the stiffening ring 11 is in direct contact with the adjacent, on the inside of the bearing in the form of grease and lubricating oil or the medium located outside on the bearing in the form of oil or gear oil.
  • FIG. 4 shows that the stiffening ring 11 with an axial end side directly adjoins the grease space of the rolling bearing 1 formed between the two bearing rings 2, 3, whereas the stiffening ring 11 according to FIG. 5 is the opposite axial end side of the sealing arrangement 7, 11 forms.
  • stiffening ring 11 it is also possible to arrange the stiffening ring 11 in such a way that both end faces of the same are in direct contact with the mentioned media, by threading the sealing disk 7 onto the stiffening ring 11, as it were, or connected to it in a form-locking manner. vulcanized (not shown in detail).
  • stiffening ring 11 it may also be useful and is therefore also covered by the invention, to connect the stiffening ring 11 with the sealing disc 7 such that direct contact with the media in the form of lubricating oil and / or grease is avoided, wherein the stiffening ring 11 of the sealing disc 7, for example, is completely enclosed in plastic.
  • Such axial recesses or pockets may also be formed in the exposed surface of the stiffening ring 11 according to the first-mentioned embodiment.
  • the desired magnetism can advantageously be limited to the region thereof or substantially increased in these regions, whereby undesired adhesions to the sealing lips 8, 9 and accordingly increased wear be effectively avoided.
  • the above embodiments are essentially based on a permanent magnet 11 or provided with permanent magnetic components stiffening ring.
  • the permanent magnetic means by the sealing disc 7 itself form by the same consists of a permanent magnetic material or at least permanent magnetic components (not shown in detail).
  • a sealing disk 7 made of plastic can have permanent-magnetic admixtures in pulverulent form, which can be introduced at predetermined locations of the sealing disk 7, preferably at a distance from the radial ends of the sealing lips 8 and 9, and in a defined amount without a to hinder certain desired flexibility of the sealing disc 7.
  • the permanent-magnetic means may be formed by a magnetic element 12 (FIGS. 9, 10a, 10b), or comprise a plurality of magnetic elements.
  • the magnetic element is a permanent magnet made of a neodymium-iron-boron (NdFeB) compound previously separately obtained from the sealing disk 7, as are commercially available cheaply and in large quantities.
  • the magnetic element 12 is glued by means of a commercially available adhesive to the metallic stiffening ring 11 of the sealing disc 7, namely on the in the installed position of the seal inwardly facing side 13 of the stiffening ring 11, the area of the bearing in which the rolling elements (in FIG 9, 10a and 10b are not recognizable).
  • the magnetic element 12 may also be attached to the side of the seal facing away from the rolling elements, but at a point in which the magnetic field of the magnetic element 12 can reach inwardly into the bearing , for example, in the region of sealing lips 14 (FIG. 10b), which are made of plastic and therefore of a very little magnetizing effect. ren material exist.
  • the sketched arrangement of the magnetic element 12 outside of the bearing to the outwardly facing side of the seal has the advantage of being able to retrofit an existing, in mounting position bearing in a simple manner, without having to open the seal of the bearing.
  • the magnetic element 12 is arranged on the inwardly facing side 13 of the sealing disk 7 or the stiffening ring 11 of the sealing disk 7, it can additionally be provided that the magnetic element 12 is arranged in a recess or pocket, as a result of which the magnetic element 12 not itself, but only its magnetic field extends into the interior of the bearing and it can be further ensured that the trapped by the magnetic element 12 ferromagnetic particles are removed from the interior of the bearing and guided along the sealing disc 7 lubricant trapped on the magnetic element 12th Do not take particles with you and tear loose.
  • Compared to the previously described embodiments with a substantially flat magnetized sealing disc 7 and a flat magnetized stiffening ring 11 are magnetic elements 12 comparatively punctiform magnetic fields, which exert a strong, locally concentrating effect on the magnetic
  • the magnetic member 12 was adhesively bonded to the stiffening ring 11 of the sealing washer 7. It is understood that the magnetic element 12 can be held only by magnetic forces between the magnetic element 12 and the metallic stiffening ring 11 on the latter. Further, the magnetic member 12 may be disposed not only on the outside of the sealing washer 7 but may be received in the sealing washer 7, for example, by injecting the magnetic member 12 into an elastomeric layer of the gasket, or if the magnetic member 12 is received in the reinforcing ring 11 of the gasket is. In the case of the magnetic element 12 received in the stiffening ring 11, it is not necessary for the stiffening ring 11 to be metallic in turn or magnetic properties.
  • seal assembly in question is not only suitable for the above-mentioned single row deep groove ball bearing in the form of a so-called "clean bearing" within a gear assembly
  • Fixed or floating bearing apply, if there is a need to weed out ferromagnetic particles from a rolling bearing lubricant.
  • roller bearings 1 are shown by way of example only, in this order a single row deep groove ball bearings, a double row angular contact ball bearings in O arrangement and finally a double row angular contact ball bearings in X arrangement, which are equipped with the inventively designed seal assembly.

Abstract

The invention relates to a sealing arrangement for a grease-lubricated rolling bearing (1), comprising at least one outer bearing ring (1), at least one inner bearing ring (3) and rolling elements (6) guided between the two rings on raceways (4, 5). At least one sealing disk (7) comprises a reinforcing ring (11) and is associated with the rolling bearing (1) on at least one front thereof in such a manner that only additional lubricant, preferably lubricating oil, can penetrate into the rolling bearing (1) in minor quantities from the outside. In order to counteract the detrimental effects of ferromagnetic particles present in lubricants on the rolling bearing (1) in a more efficient and cost-effective manner, the sealing disk (7) comprises at least one permanent-magnetic means for leaching out ferromagnetic particles from the additional lubricant and/or from the lubricant already present in the rolling bearing (1) and for fixing the ferromagnetic particles directly on the sealing disk (7) or the vicinity thereof.

Description

Bezeichnung der Erfindung Name of the invention
Dichtungsanordnung für ein WälzlagerSealing arrangement for a rolling bearing
Beschreibungdescription
Gebiet der ErfindungField of the invention
Die Erfindung betrifft eine Dichtungsanordnung für ein fettgeschmiertes Wälzlager, mit zumindest einem Lageraußenring, zumindest einem Lagerin- nenring sowie zwischen denselben in Laufbahnen geführten Wälzkörpern, wobei dem Wälzlager an zumindest einer Stirnseite wenigstens eine, einen Versteifungsring aufweisende Dichtscheibe derart zugeordnet ist, dass lediglich weiteres Schmiermittel, vorzugsweise Schmieröl, in geringen Mengen von außen in das Wälzlager eindringen kann.The invention relates to a sealing arrangement for a grease-lubricated rolling bearing, with at least one bearing outer ring, at least one bearing nenring and between the same run in rolling elements, wherein the roller bearing is assigned at least one end side at least one, a stiffening ring having sealing disc such that only further lubricant , preferably lubricating oil, can penetrate in small quantities from the outside into the rolling bearing.
Hintergrund der ErfindungBackground of the invention
Seit geraumer Zeit sind so genannte Magnetfluiddichtungen bekannt, mit deren Hilfe beispielsweise Wälzlager von Spindelmotoren für Plattenspeicher möglichst dicht ausgebildet sein sollen, um den Austritt von Schmieröl aus den Wälzlagern in einen Reinluftraum wirkungsvoll zu unterbinden. Eine der- artige Dichtungsanordnung besteht beispielsweise aus zwei voneinander be- abstandeten Metallscheiben, zwischen denen eine Permanentmagnetscheibe angeordnet ist. Radial innen ist ein Spalt gebildet, der seinerseits von ferromagnetischer Flüssigkeit ausgefüllt ist. Die ferromagnetische Flüssigkeit wird von dem Permanentmagneten in Position gehalten Hierzu wird auf die DE 198 49 094 A1 , DE 100 44 106 A1 , DE 89 04 503 U1 und die JP 60 205 018 A verwiesen.For some time, so-called magnetic fluid seals are known, by means of which, for example, rolling bearings of spindle motors for disk storage should be as tight as possible in order to effectively prevent the escape of lubricating oil from the bearings in a clean air space. One of the- For example, this type of sealing arrangement consists of two metal disks spaced apart from one another, between which a permanent magnet disk is arranged. Radially inside a gap is formed, which in turn is filled by ferromagnetic fluid. The ferromagnetic fluid is held in position by the permanent magnet. Reference is made to DE 198 49 094 A1, DE 100 44 106 A1, DE 89 04 503 U1 and JP 60 205 018 A.
Des Weiteren ist aus der US 4 948 277 A eine ringförmige, drehende Dich- tung mit integriertem magnetischen Kodierer bekannt, insbesondere für Wälzlager mit Messwertgeber, und mit einem Lippendichtsatz, der zwischen zwei Ringen angeordnet ist, in welche der Messwertgeber und der Kodierer eingesetzt sind. Mit einer derartigen Dichtung soll die Gesamtheit des Messwertgebers mit dem dazugehörigen Kodierer vor Verunreinigungen außer- halb und innerhalb des Lagers isoliert werden.Furthermore, US Pat. No. 4,948,277 A discloses an annular, rotating seal with integrated magnetic encoder, in particular for rolling bearings with transducers, and with a lip seal set between two rings into which the transducers and the encoder are inserted , With such a seal, the whole of the transmitter with the associated encoder is to be isolated from contamination outside and inside the bearing.
Schließlich ist aus EP 1 159 542 B1 eine magnetische Dichtungsanordnung für Wälzlager zur größtmöglichen Abdichtung derselben mit einem so genannten dynamischen Abdichtungsmittel in Form einer Dichtlippe eines Dich- tungsringes bekannt, die mittels magnetischer Kräfte gegen eine korrespondierende Stützfläche gedrückt wird. Im Besonderen ist an einer drehenden Armierung eine magnetische Scheibe bzw. ein Kodierer angeordnet, dessen magnetische Feldlinien auf einen ferromagnetischen Ring des Dichtungsringes wirken. Der Dichtungsring weist einen verdünnten Querschnitt auf, der die Andrückbewegung der Dichtlippe gegen die Stützfläche gestattet.Finally, EP 1 159 542 B1 discloses a magnetic seal arrangement for rolling bearings for the greatest possible sealing thereof with a so-called dynamic sealing means in the form of a sealing lip of a sealing ring, which is pressed against a corresponding support surface by means of magnetic forces. In particular, a magnetic disc or an encoder is arranged on a rotating armor whose magnetic field lines act on a ferromagnetic ring of the sealing ring. The sealing ring has a thinned cross section, which allows the pressing movement of the sealing lip against the support surface.
Diese technischen Lösungen haben gemeinsam, dass sie eine größtmögliche Abdichtung der Wälzlager bezwecken, also das Austreten von Schmiermittel und/oder das Eindringen von Schmutzpartikeln wirkungsvoll verhindern sollen. Demgegenüber sind Wälzlager für ölgeschmierte Kraftfahrzeuggetriebe bekannt, welche unter der Bezeichnung „Clean Bearing" mittels Spezialdich- tungen als abgedichtete, fettgeschmierte Lager, insbesondere als Hauptwellenlager eingesetzt werden (vgl. „Die Wälzlagerpraxis", Bäderlein, Esch- mann, Hasbargen, Weigand, Vereinigte Fachverlage GmbH, Mainz, 2002, 3. Auflage, S. 389 - 390). Diese Dichtungen haben die Aufgabe, das Wälzlager vor Verschmutzung, wie Abrieb, Verschleiß und anderen Verunreinigungen zu schützen. Gleichwohl ist es erwünscht, dass Schmiermittel wie Getriebeöl möglichst in ausreichender Sauberkeit in kleinen Mengen von außen in das Wälzlager zum Schmieren desselben eindringen kann. Wenngleich im Hinblick auf den Verwendungszweck derart abgedichteter Wälzlager bereits eine Erhöhung der Lebensdauer derselben zu verzeichnen ist, kann es im Betrieb solcher Lager dennoch vorkommen, dass kleine Metallpartikel zusammen mit dem Öl in das Wälzlager gelangen und dort beim Überrollen durch die Wälzkörper Schaden anrichten, welches letztlich die Gebrauchsdauer auch solcher „Clean Bearing" - Wälzlager immer noch nachteilig begrenzt. Hier setzt die Erfindung an.These technical solutions have in common that they are the greatest possible sealing of rolling bearings, ie to prevent the escape of lubricant and / or the ingress of dirt particles effectively. By contrast, rolling bearings for oil-lubricated motor vehicle transmissions are known, which are used under the name "Clean Bearing" by means of special seals as sealed, grease-lubricated bearings, in particular as main shaft bearings (cf "Die Wälzlagerpraxis", Bäderlein, Eschmann, Hasbargen, Weigand, Vereinigte Fachverlage GmbH, Mainz, 2002, 3rd edition, p. 389 - 390). These seals have the task of protecting the rolling bearing against contamination, such as abrasion, wear and other impurities. However, it is desirable that lubricant such as gear oil as possible in sufficient cleanliness in small quantities from the outside in the rolling bearing for lubricating it can penetrate. Although with regard to the purpose of such sealed bearings already an increase in the life of the same is recorded, it may happen during operation of such camp nevertheless that small metal particles get along with the oil in the rolling bearing and cause damage when rolling over by the rolling elements, which Ultimately, the service life of even such "clean bearing" rolling bearings is still adversely limited.This is where the invention comes in.
Aufgabe der ErfindungObject of the invention
Der Erfindung liegt die Aufgabe zugrunde, eine Dichtungsanordnung für ein fettgeschmiertes Wälzlager derart weiterzubilden, dass einerseits der Zufluss von weiteren Schmiermittel, insbesondere von Öl, zwar in kleinen Mengen in das Wälzlager möglich ist, dass aber andererseits mit einfachen und kostengünstiger Mitteln das gleichzeitige Eindringen von Schmutz- und metallischen Partikeln in das Lagerinnere hinein wirkungsvoll verhindert wird. Zusammenfassung der ErfindungThe invention has the object of developing a seal assembly for a grease-lubricated bearings such that on the one hand the inflow of other lubricant, in particular of oil, although in small quantities in the rolling bearing is possible, but on the other hand with simple and inexpensive means the simultaneous penetration of Dirt and metallic particles in the bearing inside is effectively prevented. Summary of the invention
Der Erfindung liegt die Erkenntnis zugrunde, dass bei einem Einsatz eines gattungsgemäßen Wälzlagers in einem Getriebe die in demselben störenden und daher fernzuhaltenden Partikel durchweg aus solchen Metallen bestehen, die sich mittels eines Magneten aus dem in das Wälzlager eindringenden Ölstrom herausholen lassen. Demnach reicht es zur Lösung der gestellten Aufgabe an sich aus, einen Magneten derart am Wälzlager anzuordnen, dass die in dem in das Wälzlager führenden Ölstrom befindlichen Metallpar- tikel an diesen Magneten abgeschieden werden.The invention is based on the finding that when using a generic rolling bearing in a transmission in the same disturbing and therefore fernetzhaltenden particles consistently consist of such metals that can be pulled out by means of a magnet from the penetrating into the rolling bearing oil flow. Accordingly, it is sufficient for the solution of the task per se to arrange a magnet on the roller bearing such that in the leading into the rolling bearing oil particles metal particles are deposited on this magnet.
Gemäß den Merkmalen des Hauptanspruchs geht die Erfindung daher aus von einer Dichtungsanordnung für ein fettgeschmiertes Wälzlager, mit zumindest einem Lageraußenring, zumindest einem Lagerinnenring sowie zwi- sehen denselben in Laufbahnen geführten Wälzkörpern, wobei dem Wälzlager an zumindest einer Stirnseite wenigstens eine, einen Versteifungsring aufweisende Dichtscheibe derart zugeordnet ist, dass lediglich weiteres Schmiermittel, vorzugsweise Schmieröl, in geringen Mengen von außen in das Wälzlager eindringen kann. Diese Dichtungsanordnung ist zudem da- durch gekennzeichnet, dass die Dichtscheibe zumindest ein permanentmagnetisches Mittel zum Herauslösen ferromagnetischer Partikel aus dem weiteren Schmiermittel und/oder aus dem im Wälzlager bereits befindlichen Schmierfett und zur Fixierung der ferromagnetischen Partikel unmittelbar an der Dichtscheibe oder benachbart zu derselben aufweist.According to the features of the main claim, the invention is therefore based on a seal assembly for a grease-lubricated roller bearing, with at least one bearing outer ring, at least one bearing inner ring and between see the same run in rolling elements, wherein the rolling bearing on at least one end face at least one, a stiffening ring having gasket is assigned such that only further lubricant, preferably lubricating oil, can penetrate in small amounts from the outside into the rolling bearing. This sealing arrangement is additionally characterized in that the sealing disc has at least one permanent-magnetic means for detaching ferromagnetic particles from the further lubricant and / or from the grease already present in the rolling bearing and for fixing the ferromagnetic particles directly to the sealing disc or adjacent thereto.
Die Unteransprüche beschreiben bevorzugte Weiterbildungen oder Ausgestaltungen der Erfindung.The subclaims describe preferred developments or refinements of the invention.
Gemäß einer ersten Ausgestaltungsform kann das permanentmagnetische Mittel durch den Versteifungsring der Dichtscheibe gebildet sein, welcher zumindest in ausgewählten Bereichen aus einem permanentmagnetischenAccording to a first embodiment, the permanent magnetic means may be formed by the stiffening ring of the sealing disc, which at least in selected areas of a permanent magnetic
Material besteht oder permanentmagnetische Bestandteile aufweist. Hierbei kann der Versteifungsring derart mit der Dichtscheibe verbunden oder an derselben angeordnet sein, dass zumindest eine Stirnfläche des Versteifungsrings in direktem Kontakt mit dem benachbarten, lagerinnenseitig oder lageraußenseitig befindlichen Medium in Form von Schmieröl und/oder Schmierfett steht.Material consists of or permanent magnetic components. in this connection For example, the stiffening ring can be connected to the sealing disc or arranged thereon such that at least one end face of the stiffening ring is in direct contact with the adjacent medium inside or outside of the bearing in the form of lubricating oil and / or lubricating grease.
Ebenso kann der Versteifungsring auch derart mit der Dichtscheibe verbunden sein, dass ein direkter Kontakt mit dem benachbarten, lagerinnenseitig und/oder lageraußenseitig befindlichen Medium in Form von Schmieröl und/oder Schmierfett vermieden wird.Likewise, the stiffening ring may also be connected to the sealing disc in such a way that direct contact with the adjacent medium located inside and / or outside of the bearing in the form of lubricating oil and / or lubricating grease is avoided.
Gemäß einer weiteren möglichen Ausgestaltungsform kann das permanent- magnetische Mittel auch durch die Dichtscheibe selbst gebildet sein, welche zumindest in ausgewählten Bereichen aus einem permanentmagnetischen Material besteht oder permanentmagnetische Bestandteile aufweist.According to a further possible embodiment, the permanent magnetic means may also be formed by the sealing disk itself, which consists of a permanent magnetic material at least in selected areas or has permanent magnetic components.
Gemäß einer wiederum weiteren möglichen Ausgestaltungsform kann das permanentmagnetsiche Mittel durch ein magnetisches Element gebildet sein, welches an der Dichtscheibe befestigt ist. Als magnetisches Element kom- men handelsübliche Permanentmagnete, beispielsweise auf Basis von Neodym-Eisen-Bor (NdFeB) hergestellte Magnete, in Frage. Derartige magnetische Elemente sind kleinbauend, in großer Anzahl preiswert kommerziell erhältlich, so dass sich der Vorteil ergibt, bereits bestehende Dichtungen durch ein einfaches Ergänzen der Dichtung mit dem magnetischen Element nachzurüsten. Als weiter vorteilhaft erweist sich, dass sich das Befestigen des magnetischen Elementes an der Dichtung durch Kleben, beispielsweise mittels eines handelsüblichen Klebers, schnell und einfach durchführen lässt.According to yet another possible embodiment, the permanent magnetic means may be formed by a magnetic element which is fixed to the sealing disc. Commercially available permanent magnets, for example magnets based on neodymium-iron-boron (NdFeB), come into consideration as the magnetic element. Such magnetic elements are physically small, in large numbers inexpensive commercially available, so that there is the advantage of retrofitting existing seals by simply supplementing the seal with the magnetic element. As further advantageous proves that the attachment of the magnetic element to the seal by gluing, for example by means of a commercial adhesive, can be carried out quickly and easily.
Vorzugsweise ist das magnetische Element durch Kleben an dem Verstei- fungsring der Dichtung befestigt, woraus der Vorteil resultiert, dass der Versteifungsring dem magnetischen Element eine starre Basis bietet. Weiter erweist sich als vorteilhaft, dass der metallische Versteifungsring das Mag- netfeld des magnetischen Elementes abschirmt und ein Austreten des Magnetfeldes in den Bereich ausserhalb des Lagers verhindert. Tritt nämlich das Magnetfeld zumindest teilweise aus dem Bereich des Lagers nach außen, beispielsweise in den Bereich der Zuleitung des Schmierstoffs, aus, so be- steht die Gefahr, dass das Magnetfeld ferromagnetische Partikel in den Bereich des Lagers, also in den zwischen den Innenring und dem Außenring befindlichen Bereich, in dem die Wälzkörper sich befinden, hineinzieht.Preferably, the magnetic element is adhesively secured to the stiffening ring of the seal, resulting in the advantage that the stiffening ring provides the magnetic element with a rigid base. Furthermore, it proves to be advantageous that the metallic stiffening ring Screen of the magnetic element shields and prevents leakage of the magnetic field in the area outside the camp. If the magnetic field exits the region of the bearing at least partially outwards, for example into the region of the supply line of the lubricant, there is a risk that the magnetic field will transfer ferromagnetic particles into the region of the bearing, that is between the inner ring and the inner ring the outer ring located area in which the rolling elements are, pulls.
In weiterer vorteilhafter Ausgestaltung der Erfindung können der Verstei- fungsring und/oder die Dichtscheibe eine oder mehrere axiale Ausnehmungen beziehungsweise Taschen zur Aufnahme anhaftender ferromagneti- scher Partikel aufweisen. Insoweit kann es auch sinnvoll sein, zur weitestge- henden Begrenzung der Anhaftungen ferromagnetischer Partikel auf diesen axialen Ausnehmungen beziehungsweise Taschen den Magnetismus aus- schließlich auf diese Bereiche zu beschränken oder in diesen Bereichen erhöht auszubilden.In a further advantageous embodiment of the invention, the stiffening ring and / or the sealing disc can have one or more axial recesses or pockets for receiving adhering ferromagnetic particles. To that extent, it may also be expedient to restrict the magnetism exclusively to these areas or to increase them in these areas to the greatest extent possible to limit the adhesion of ferromagnetic particles to these axial recesses or pockets.
Wie die Erfindung in einer anderen Weiterbildung vorsieht, können einreihige oder mehrreihige Wälzlager in Form eines Festlagers oder eines Loslagers mit der erfindungsgemäßen Dichtungsanordnung ausgebildet sei. In Anlehnung an den letztgenannten Stand der Technik bietet sich eine derartige Dichtungsanordnung besonders für schmutzgeschützte Wälzlager eines Kraftfahrzeuggetriebes an.As the invention provides in another development, single row or multi-row roller bearings may be formed in the form of a fixed bearing or a floating bearing with the seal assembly according to the invention. Based on the last-mentioned prior art, such a sealing arrangement is particularly suitable for dirt-protected rolling bearings of a motor vehicle transmission.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Die Erfindung wird im Folgenden anhand der beiliegenden Zeichnung an einigen Ausführungsformen näher erläutert. Darin zeigtThe invention will be explained in more detail below with reference to the accompanying drawings of some embodiments. It shows
Fig. 1 einen Teilaxialschnitt durch ein mit einer erfindungsgemäßen Dichtungsanordnung ausgestattetes Wälzlager, Fig. 2 die Einzelheit „Z" gemäß Fig. 1 in Form einer Dichtscheibe der Dichtungsanordnung,1 is a partial axial section through an equipped with a seal assembly according to the invention rolling bearing, 2 shows the detail "Z" according to FIG. 1 in the form of a sealing disk of the sealing arrangement, FIG.
Fig. 3 die Einzelheit „Y" gemäß Fig. 2,3 shows the detail "Y" of FIG. 2,
Fig. 4 die Dichtscheibe gemäß einer ersten Ausführungsform,4 shows the sealing disk according to a first embodiment,
Fig. 5 die Dichtscheibe gemäß einer zweiten Ausführungsform,5 shows the sealing disc according to a second embodiment,
Fig. 6 bis Fig. 8 mögliche Anwendungsbeispiele der erfindungsgemäßenFig. 6 to Fig. 8 possible application examples of the invention
Dichtungsanordnung,Sealing arrangement,
Fig. 9 die Dichtscheibe gemäß einer dritten Ausführungsform in einer Draufsicht,9 shows the sealing disk according to a third embodiment in a plan view,
Fig. 10a die Dichtscheibe gemäß der dritten Ausführungsform in einer Schnittansicht gemäß der Linie B-B aus Fig. 9, undFig. 10a, the sealing disc according to the third embodiment in a sectional view taken along the line B-B of Fig. 9, and
Fig. 10b die Dichtscheibe aus Fig. 10a mit einer vergrößerten An- sieht des Abschnittes ,Z-10b shows the sealing disk from FIG. 10a with an enlarged view of the section "Z" in FIG.
Detaillierte Beschreibung der ZeichnungenDetailed description of the drawings
Fig. 1 zeigt ein einreihiges Wälzlager 1 in Form eines fettgeschmierten Rillenkugellagers, welches beispielsweise in einem nicht näher gezeigten Kraftfahrzeuggetriebe eingebaut ist. Im Wesentlichen weist dieses Wälzlager 1 einen Lageraußenring 2, einen Lagerinnenring 3 sowie zwischen denselben in Laufbahnen 4, 5 der Lagerringe 2, 3 geführte Wälzkörper 6 auf. Das Wälz- lager 1 ist an seinen beiden Stirnseiten mittels je einer Dichtscheibe 7 abgedichtet, die unter Verwendung eines nichtmetallischen Werkstoffs gefertigt ist. Die Dichtscheiben 7 weisen Dichtlippen 8 und 9 auf, die an der radial inneren Mantelfläche des Lageraußenringes 2 bzw. an der radial äußeren Mantelfläche des Lagerinnenringes 3 dichtend anliegen. Zudem weist die radial außen angeordnete Dichtlippe 8 zumindest eine Be- und Entlüftungsnut 10 auf (siehe Figuren 2 und 3), über die Öl von außen in das Wälzlager 1 eindringen sowie aus diesem abfließen kann.Fig. 1 shows a single-row roller bearing 1 in the form of a grease-lubricated deep groove ball bearing, which is installed for example in a motor vehicle transmission not shown in detail. In essence, this rolling bearing 1 has a bearing outer ring 2, a bearing inner ring 3 and between the same in raceways 4, 5 of the bearing rings 2, 3 guided rolling elements 6. The rolling bearing 1 is sealed at its two end faces by means of a respective sealing disk 7, which is manufactured using a non-metallic material. The sealing discs 7 have sealing lips 8 and 9, which at the radial inner circumferential surface of the bearing outer ring 2 or 3 sealingly abut against the radially outer surface of the bearing inner ring 3. In addition, the radially outer sealing lip 8 has at least one ventilation groove 10 (see FIGS. 2 and 3), via which oil can penetrate from the outside into the rolling bearing 1 and can flow out of it.
Gestützt wird die Dichtscheibe 7 von einem Versteifungsring 11 , der vorzugsweise mit der Dichtscheibe 7 durch Formschluss verbunden ist, beispielsweise in dieselbe eingeschnappt oder bei der Herstellung einer Dicht- scheibe 7 aus Kunststoff in diese eingegossen oder an diese anvulkanisiert wird. Sicherlich sind auch jegliche anderen an sich bekannten Fügemaßnahmen, wie beispielsweise Kleben, anwendbar und demgemäß durch die Erfindung mit erfasst.The sealing disk 7 is supported by a stiffening ring 11, which is preferably connected to the sealing disk 7 by positive locking, for example, snapped into the same or cast in the manufacture of a sealing disc 7 made of plastic or vulcanized to this. Certainly, any other known joining measures, such as gluing, are applicable and accordingly covered by the invention.
Die Be- und Entlüftungsnut 10 an der radial außen angeordneten Dichtlippe 8 der Dichtscheibe 7 ist entsprechend der Forderung nach einer geringer Reibung, guter Schmierung und der Zurückhaltung von Schmutzpartikeln ausgelegt. Eine enge Be- und Entlüftungsnut 10 lässt hierbei zwar wie bereits erwähnt das Eindringen und Abfließen weiteren Schmiermittels, vorlie- gend Getriebeöl, in geringen Mengen von außen in das Wälzlager 1 zu, hält jedoch Partikel zurück.The ventilation groove 10 on the radially outer sealing lip 8 of the sealing disc 7 is designed according to the requirement for low friction, good lubrication and the retention of dirt particles. Although, as already mentioned, a narrow ventilation and venting groove 10 permits the penetration and outflow of further lubricant, in this case gear oil, into the roller bearing 1 from the outside in small amounts, but retains particles.
Ungeachtet dessen wurde in Untersuchungen gefunden, dass durch die bereits genannten baulichen Merkmale zwar ein vorteilhafter Dichtungseffekt zu verzeichnen ist, der mit einer erhöhten Laufdauer des Wälzlagers 1 infolge geringeren Verschleißes einhergeht, jedoch ist das Eindringen von metallischen, insbesondere ferromagnetischen Partikeln infolge Zahnabrieb des Getriebes in das Wälzlager 1 immer noch nicht gänzlich auszuschließen und die Schutzwirkung der Abdichtung daher noch verbesserungswürdig. Daher weist die Dichtscheibe 7 gemäß der Erfindung zumindest ein permanentmagnetisches Mittel zum Herauslösen der ferromagnetischen Partikel aus dem weiteren Schmiermittel, vorliegend dem Getriebeöl, und/oder dem im Wälzlager 1 bereits befindlichen Schmierfett sowie zur Fixierung dieser Partikel unmittelbar an der Dichtscheibe 7 oder benachbart zu derselben auf.Regardless of this, it has been found in examinations that, although the structural features already mentioned have an advantageous sealing effect, which is associated with an increased running time of the rolling bearing 1 as a result of lower wear, the penetration of metallic, in particular ferromagnetic, particles as a result of tooth wear of the gearbox is the rolling bearing 1 is still not completely ruled out and the protective effect of the seal therefore still in need of improvement. Therefore, the sealing disc 7 according to the invention, at least one permanent magnetic means for dissolving out the ferromagnetic particles from the other lubricant, in this case the transmission oil, and / or the in the rolling bearing 1 already located grease and for fixing these particles directly on the sealing disc 7 or adjacent to the same.
Gemäß einer ersten Ausgestaltungsform ist das permanentmagnetische Mittel durch den Versteifungsring 11 selbst gebildet, welcher zumindest in ausgewählten Bereichen aus einem permanentmagnetischen Material besteht oder permanentmagnetische Bestandteile aufweist. Permanentmagnetmaterialien sind vielfältig bekannt. So können beispielsweise Stahl, Ferrite, Aluminium-Nickel-Kobalt (AINiCo)-Verbindungen, Samarium-Kobalt (SmCo)- Verbindungen oder Neodym-Eisen-Bor (NdFeB)-Verbindungen, beispielsweise auch in Kunststoff gebunden, Verwendung finden. Es versteht sich ferner, dass aus den vorgenannten, beispielhaft aufgeführten Verbindungen auch das magnetische Element bestehen kann, das als weitere Ausgestaltung des magnetischen Mittels als dritte Ausführungsform (Fig. 9, 10a, 10b) vorgeschlagen wurde.According to a first embodiment, the permanent magnetic means is formed by the stiffening ring 11 itself, which consists at least in selected areas of a permanent magnetic material or permanent magnetic components. Permanent magnet materials are widely known. For example, steel, ferrites, aluminum-nickel-cobalt (AINiCo) compounds, samarium-cobalt (SmCo) compounds or neodymium-iron-boron (NdFeB) compounds, for example also bound in plastic, can be used. It is further understood that from the aforementioned compounds exemplified also the magnetic element may exist, which has been proposed as a further embodiment of the magnetic means as a third embodiment (Fig. 9, 10a, 10b).
Als zweckmäßig hat es sich erwiesen, wenn, wie in den Figuren 4 und 5 vergrößert dargestellt ist, der magnetische Versteifungsring 11 derart mit der Dichtscheibe 7 verbunden oder an derselben angeordnet ist, dass zumindest eine Stirnfläche des Versteifungsringes 11 in direktem Kontakt mit dem benachbarten, lagerinnenseitig befindlichem Medium in Form von Schmierfett und Schmieröl oder dem lageraußenseitig befindlichem Medium in Form von Öl bzw. Getriebeöl steht. So zeigt Fig. 4, dass der Versteifungsring 11 mit einer axialen Stirnseite unmittelbar an dem zwischen den beiden Lagerrin- gen 2, 3 gebildeten Fettraum des Wälzlagers 1 angrenzt, währen der Versteifungsring 11 gemäß Fig. 5 die gegenüberliegende axiale Stirnseite der Dichtungsanordnung 7, 11 bildet.It has proven to be expedient if, as shown enlarged in FIGS. 4 and 5, the magnetic stiffening ring 11 is connected to the sealing disk 7 or arranged thereon such that at least one end face of the stiffening ring 11 is in direct contact with the adjacent, on the inside of the bearing in the form of grease and lubricating oil or the medium located outside on the bearing in the form of oil or gear oil. Thus, FIG. 4 shows that the stiffening ring 11 with an axial end side directly adjoins the grease space of the rolling bearing 1 formed between the two bearing rings 2, 3, whereas the stiffening ring 11 according to FIG. 5 is the opposite axial end side of the sealing arrangement 7, 11 forms.
Nicht ausgeschlossen ist es ferner, den Versteifungsring 11 so anzuordnen, dass beide Stirnseiten desselben mit den genannten Medien in direktem Kontakt stehen, indem die Dichtscheibe 7 sozusagen auf den Versteifungsring 11 aufgefädelt und formschlüssig mit demselben verbunden oder ein- fach anvulkanisiert wird (nicht näher dargestellt).It is also possible to arrange the stiffening ring 11 in such a way that both end faces of the same are in direct contact with the mentioned media, by threading the sealing disk 7 onto the stiffening ring 11, as it were, or connected to it in a form-locking manner. vulcanized (not shown in detail).
Demgegenüber kann es auch sinnvoll sein und ist demgemäß durch die Erfindung ebenfalls mit erfasst, den Versteifungsring 11 derart mit der Dichtscheibe 7 zu verbinden, dass ein direkter Kontakt mit den Medien in Form von Schmieröl und/oder Schmierfett vermieden ist, wobei der Versteifungsring 11 von der Dichtscheibe 7 beispielsweise vollständig mit Kunststoff umschlossen ist.In contrast, it may also be useful and is therefore also covered by the invention, to connect the stiffening ring 11 with the sealing disc 7 such that direct contact with the media in the form of lubricating oil and / or grease is avoided, wherein the stiffening ring 11 of the sealing disc 7, for example, is completely enclosed in plastic.
Durch diese Maßnahme ist es in vorteilhafter Ausgestaltung der Erfindung möglich, beispielsweise in die Kunststoffoberfläche der Dichtscheibe 7 eine oder mehrere hier nicht näher gezeigte axiale Ausnehmungen beziehungsweise Taschen zur Aufnahme anhaftender ferromagnetischer Partikel zu integrieren, wodurch die aus dem Schmieröl und/oder dem Schmierfett herausgelösten Partikel in einer beruhigten Zone abgelagert werden und somit die Gefahr des Ablösens und Wiedereintritts in das benachbarte Medium minimiert ist.By this measure, it is possible in an advantageous embodiment of the invention, for example, in the plastic surface of the sealing disc 7 to integrate one or more axial recesses or pockets not shown here for receiving adhering ferromagnetic particles, whereby the leached out of the lubricating oil and / or the grease particles be deposited in a calm zone and thus the risk of detachment and re-entry into the adjacent medium is minimized.
Derartige axiale Ausnehmungen beziehungsweise Taschen können gemäß dem erstgenannten Ausführungsbeispiel auch in der frei liegenden Oberflä- che des Versteifungsringes 11 ausgebildet sein.Such axial recesses or pockets may also be formed in the exposed surface of the stiffening ring 11 according to the first-mentioned embodiment.
Zur größtmöglichen Begrenzung der Anhaftungen ferromagnetischen Partikel an den Ausnehmungen beziehungsweise Taschen kann des Weiteren der gewünschte Magnetismus vorteilhaft auf den Bereich derselben be- schränkt bzw. in diesen Bereichen wesentlich erhöht ausgebildet sein, wodurch unerwünschte Anhaftungen an den Dichtlippen 8, 9 und demgemäß ein erhöhter Verschleiß derselben wirkungsvoll vermieden werden.In order to limit as far as possible the adhesion of ferromagnetic particles to the recesses or pockets, the desired magnetism can advantageously be limited to the region thereof or substantially increased in these regions, whereby undesired adhesions to the sealing lips 8, 9 and accordingly increased wear be effectively avoided.
Vorstehende Ausführungsbeispiele stellen im Wesentlichen auf einen per- manentmagnetischen oder mit permanentmagnetischen Bestandteilen versehenen Versteifungsring 11 ab. Möglich ist es jedoch auch, gemäß einer weiteren Ausgestaltungsform das permanentmagnetische Mittel durch die Dichtscheibe 7 selbst auszubilden, indem dieselbe aus einem permanentmagnetischen Material besteht oder zumindest permanentmagnetische Bestandteile aufweist (nicht näher dargestellt).The above embodiments are essentially based on a permanent magnet 11 or provided with permanent magnetic components stiffening ring. However, it is also possible, according to another embodiment, the permanent magnetic means by the sealing disc 7 itself form by the same consists of a permanent magnetic material or at least permanent magnetic components (not shown in detail).
So kann eine aus Kunststoff gefertigte Dichtscheibe 7 beispielsweise per- manentmagnetische Beimengungen in pulverförmiger Form aufweisen, die an vorbestimmten Orten der Dichtscheibe 7, vorzugsweise beabstandet zu den radialen Enden der Dichtlippen 8 und 9, und in definierter Menge einge- bracht sein können, ohne eine bestimmte gewünschte Flexibilität der Dichtscheibe 7 zu behindern.For example, a sealing disk 7 made of plastic can have permanent-magnetic admixtures in pulverulent form, which can be introduced at predetermined locations of the sealing disk 7, preferably at a distance from the radial ends of the sealing lips 8 and 9, and in a defined amount without a to hinder certain desired flexibility of the sealing disc 7.
Ergänzend hierzu kann als dritte Ausgestaltungsform das permanentmagnetische Mittel durch ein magnetisches Element 12 ausgebildet sein (Fig. 9, 10a, 10b), bzw. mehrere magnetische Elemente umfassen. In Fig. 9 bzw. 10a und 10b ist das magnetische Element ein zuvor von der Dichtscheibe 7 getrennt hergestellter Permanentmagnet aus einer Neodym-Eisen-Bor (NdFeB)-Verbindung, wie sie im Handel billig und in großer Stückzahl erhältlich sind. Das magnetische Element 12 ist mittels eines handelsüblichen Klebers an den metallischen Versteifungsring 11 der Dichtscheibe 7 geklebt, und zwar auf die in Einbaustellung der Dichtung nach innen weisende Seite 13 des Versteifungsrings 11 , die dem Bereich des Lagers, in dem sich die Wälzkörper (in Fig. 9, 10a und 10b nicht erkennbar) befinden, zugekehrt ist. Ein Austreten des Magnetfeldes des magnetischen Elementes 12 nach au- ßen ist durch den metallischen Versteifungsring 11 verhindert, der das Magnetfeld des magnetischen Elementes 12 auf das Innere des Lagers weitgehend beschränkt. Es versteht sich, dass in einer Abwandlung der Erfindung das magnetische Element 12 auch an die nach außen, den Wälzkörpern abgekehrte Seite der Dichtung angebracht sein kann, jedoch an einer Stelle, in der das Magnetfeld des magnetischen Elementes 12 nach innen in das Lager greifen kann, beispielsweise also im Bereich von Dichtlippen 14 (Fig. 10b), die aus Kunststoff und damit aus einem nur sehr wenig magnetisierba- ren Material bestehen. Die skizzierte Anordnung des magnetischen Elementes 12 außerhalb des Lagers an die nach außen weisende Seite der Dichtung bietet den Vorteil, ein bestehendes, in Montagestellung befindliches Lager auf einfache Weise nachrüsten zu können, ohne die Dichtung des Lagers öffnen zu müssen. Ist dagegen das magnetische Element 12 an der nach innen weisenden Seite 13 der Dichtscheibe 7 bzw. des Versteifungsrings 11 der Dichtscheibe 7 angeordnet, kann zusätzlich vorgesehen sein, dass das magnetische Element 12 in einer Ausnehmung bzw. Tasche angeordnet ist, wodurch das magnetische Element 12 nicht selbst, sondern nur dessen Magnetfeld in das Innere des Lagers hineinreicht sowie weiter sichergestellt sein kann, dass die von dem magnetischen Element 12 eingefangenen ferromagnetischen Partikel aus dem Inneren des Lagers entfernt werden und entlang der Dichtscheibe 7 geführtes Schmiermittel die an dem magnetischen Element 12 gefangenen Partikel nicht mitnehmen und losreis- sen kann. Im Vergleich zu den zuvor beschriebenen Ausführungsbeispielen mit einer im wesentlichen flächig magnetisierten Dichtscheibe 7 bzw. einem flächig magnetisierten Versteifungsring 11 stellen magnetische Elemente 12 vergleichsweise punktförmige Magnetfelder dar, die auf die ferromagnetischen Partikel eine starke, lokal konzentrierende Wirkung ausüben.In addition thereto, as a third embodiment, the permanent-magnetic means may be formed by a magnetic element 12 (FIGS. 9, 10a, 10b), or comprise a plurality of magnetic elements. In FIGS. 9 and 10a and 10b, the magnetic element is a permanent magnet made of a neodymium-iron-boron (NdFeB) compound previously separately obtained from the sealing disk 7, as are commercially available cheaply and in large quantities. The magnetic element 12 is glued by means of a commercially available adhesive to the metallic stiffening ring 11 of the sealing disc 7, namely on the in the installed position of the seal inwardly facing side 13 of the stiffening ring 11, the area of the bearing in which the rolling elements (in FIG 9, 10a and 10b are not recognizable). Outward leakage of the magnetic field of the magnetic element 12 is prevented by the metallic stiffening ring 11, which largely limits the magnetic field of the magnetic element 12 to the interior of the bearing. It is understood that in a modification of the invention, the magnetic element 12 may also be attached to the side of the seal facing away from the rolling elements, but at a point in which the magnetic field of the magnetic element 12 can reach inwardly into the bearing , for example, in the region of sealing lips 14 (FIG. 10b), which are made of plastic and therefore of a very little magnetizing effect. ren material exist. The sketched arrangement of the magnetic element 12 outside of the bearing to the outwardly facing side of the seal has the advantage of being able to retrofit an existing, in mounting position bearing in a simple manner, without having to open the seal of the bearing. If, in contrast, the magnetic element 12 is arranged on the inwardly facing side 13 of the sealing disk 7 or the stiffening ring 11 of the sealing disk 7, it can additionally be provided that the magnetic element 12 is arranged in a recess or pocket, as a result of which the magnetic element 12 not itself, but only its magnetic field extends into the interior of the bearing and it can be further ensured that the trapped by the magnetic element 12 ferromagnetic particles are removed from the interior of the bearing and guided along the sealing disc 7 lubricant trapped on the magnetic element 12th Do not take particles with you and tear loose. Compared to the previously described embodiments with a substantially flat magnetized sealing disc 7 and a flat magnetized stiffening ring 11 are magnetic elements 12 comparatively punctiform magnetic fields, which exert a strong, locally concentrating effect on the ferromagnetic particles.
Bei der vorbeschriebenen dritten Ausführungsform war das magnetische Element 12 durch Kleben an dem Versteifungsring 11 der Dichtscheibe 7 angeordnet. Es versteht sich, dass das magnetische Element 12 auch nur aufgrund von magnetischen Kräften zwischen dem magnetischen Element 12 und dem metallischen Versteifungsring 11 an letzterem gehalten sein kann. Weiter kann das magnetische Element 12 nicht nur aussen an der Dichtscheibe 7 angeordnet, sondern in der Dichtscheibe 7 aufgenommen sein, beispielsweise indem das magnetische Element 12 in eine Elastomerschicht der Dichtung eingespritzt ist, oder wenn das magnetische Element 12 in dem Versteifungsring 11 der Dichtscheibe aufgenommen ist. Im Fall des in dem Versteifungsrings 11 aufgenommenen magnetischen Elementes 12 ist es nicht erforderlich, dass der Versteifungsring 11 seinerseits metallisch ist oder magnetische Eigenschaften aufweist.In the above-described third embodiment, the magnetic member 12 was adhesively bonded to the stiffening ring 11 of the sealing washer 7. It is understood that the magnetic element 12 can be held only by magnetic forces between the magnetic element 12 and the metallic stiffening ring 11 on the latter. Further, the magnetic member 12 may be disposed not only on the outside of the sealing washer 7 but may be received in the sealing washer 7, for example, by injecting the magnetic member 12 into an elastomeric layer of the gasket, or if the magnetic member 12 is received in the reinforcing ring 11 of the gasket is. In the case of the magnetic element 12 received in the stiffening ring 11, it is not necessary for the stiffening ring 11 to be metallic in turn or magnetic properties.
Ebenso einfach lassen sich dann auch die oben bereits erwähnten Ausnehmungen beziehungsweise Taschen ausbilden und in die Dichtscheibe 7 inte- grieren.Just as easily, the recesses or pockets already mentioned above can then also be formed and integrated into the sealing disk 7.
Für den Fachmann ist es in Kenntnis der Erfindung leicht nachvollziehbar, dass sich die in Rede stehende Dichtungsanordnung nicht nur für das oben erwähnte einreihige Rillenkugellager in Form eines so genannten „Clean Bearing" innerhalb einer Getriebeanordnung eignet. Es kann vielmehr für jegliches ein- oder mehrreihiges Fest- oder Loslager Anwendung finden, sofern das Erfordernis besteht, ferromagnetische Partikel aus einem Wälzlager-Schmiermittel auszusondern.It will be readily understood by those skilled in the art that the seal assembly in question is not only suitable for the above-mentioned single row deep groove ball bearing in the form of a so-called "clean bearing" within a gear assembly Fixed or floating bearing apply, if there is a need to weed out ferromagnetic particles from a rolling bearing lubricant.
In den Figuren 6 bis 8 sind lediglich beispielhaft drei Wälzlager 1 dargestellt, vorliegend in der genannten Reihenfolge ein einreihiges Rillenkugellager, ein zweireihiges Schrägkugellager in O-Anordnung und schließlich ein zweireihiges Schrägkugellager in X-Anordnung, welche mit der erfindungsgemäß ausgebildeten Dichtungsanordnung ausgestattet sind. In the figures 6 to 8 three roller bearings 1 are shown by way of example only, in this order a single row deep groove ball bearings, a double row angular contact ball bearings in O arrangement and finally a double row angular contact ball bearings in X arrangement, which are equipped with the inventively designed seal assembly.
Bezugszeichenreference numeral
1 Wälzlager1 rolling bearing
2 Lageraußenring 3 Lagerinnenring2 bearing outer ring 3 bearing inner ring
4 Laufbahn am Lageraußenring 24 raceway on the bearing outer ring 2
5 Laufbahn am Lagerinnenring 35 raceway on the bearing inner ring 3
6 Wälzkörper6 rolling elements
7 Dichtscheibe 8 Dichtlippe7 sealing washer 8 sealing lip
9 Dichtlippe9 sealing lip
10 Be- und Entlüftungsnut10 ventilation groove
11 Versteifungsring11 stiffening ring
12 magnetisches Element 13 nach innen weisende Seite von 1112 magnetic element 13 inwardly facing side of 11
14 Dichtlippe 14 sealing lip

Claims

Schaeffler KG Industriestr. 1 - 3, 91074 HerzogenaurachPatentansprüche Schaeffler KG Industriestr. 1 - 3, 91074 HerzogenaurachPatentansprüche
1. Dichtungsanordnung für ein fettgeschmiertes Wälzlager (1), mit zumindest einem Lageraußenring (2), zumindest einem Lagerinnenring (3) sowie zwischen denselben in Laufbahnen (4, 5) geführten Wälz- körpern (6), wobei dem Wälzlager (1) an zumindest einer Stirnseite wenigstens eine, einen Versteifungsring (11) aufweisende Dichtscheibe (7) derart zugeordnet ist, dass lediglich weiteres Schmiermittel, vorzugsweise Schmieröl, in geringen Mengen von außen in das Wälzlager (1) eindringen kann, dadurch gekennzeichnet, dass die Dicht- scheibe (7) zumindest ein permanentmagnetisches Mittel zum Herauslösen ferromagnetischer Partikel aus dem weiteren Schmiermittel und/oder aus dem im Wälzlager (1) bereits befindlichen Schmierfett und zur Fixierung der ferromagnetischen Partikel unmittelbar an der Dichtscheibe (7) oder benachbart zu derselben aufweist.1. A sealing arrangement for a grease-lubricated rolling bearing (1), with at least one bearing outer ring (2), at least one bearing inner ring (3) and between them in raceways (4, 5) guided Wälz- bodies (6), wherein the rolling bearing (1) at least one end face, at least one, a stiffening ring (11) having sealing disc (7) is assigned such that only further lubricant, preferably lubricating oil, in small amounts from the outside in the rolling bearing (1) can penetrate, characterized in that the sealing disc (7) has at least one permanent magnetic means for releasing ferromagnetic particles from the further lubricant and / or from the already in the rolling bearing (1) located grease and for fixing the ferromagnetic particles directly to the sealing disc (7) or adjacent thereto.
2. Dichtungsanordnung nach Anspruch 1 , dadurch gekennzeichnet, dass das permanentmagnetische Mittel durch den Versteifungsring (11) gebildet ist, welcher zumindest in ausgewählten Bereichen aus einem permanentmagnetischen Material besteht oder permanent- magnetische Bestandteile aufweist. 2. Sealing arrangement according to claim 1, characterized in that the permanent magnetic means by the stiffening ring (11) is formed, which consists at least in selected areas of a permanent magnetic material or permanent magnetic components.
3. Dichtungsanordnung nach Anspruch 2, dadurch gekennzeichnet, dass der Versteifungsring (11) derart mit der Dichtscheibe (7) verbunden oder an derselben angeordnet ist, dass zumindest eine Stirnfläche des Versteifungsrings (11) in direktem Kontakt mit dem benach- barten lagerinnenseitig oder lageraußenseitig befindlichen Medium in3. Sealing arrangement according to claim 2, characterized in that the stiffening ring (11) is so connected to the sealing disc (7) or arranged thereon, that at least one end face of the stiffening ring (11) in direct contact with the adjacent bearing inside or bearing outside located medium in
Form von Schmieröl und/oder Schmierfett steht.Form of lubricating oil and / or grease stands.
4. Dichtungsanordnung nach Anspruch 2, dadurch gekennzeichnet, dass der Versteifungsring (11) derart mit der Dichtscheibe (7) verbun- den ist, dass ein direkter Kontakt mit dem benachbarten lagerinnenseitig und/oder lageraußenseitig befindlichen Medium in Form von Schmieröl und/oder Schmierfett vermieden wird.4. Sealing arrangement according to claim 2, characterized in that the stiffening ring (11) is so connected to the sealing disc (7) that a direct contact with the adjacent bearing inside and / or outside bearing medium in the form of lubricating oil and / or grease is avoided.
5. Dichtungsanordnung nach Anspruch 1 , dadurch gekennzeichnet, dass das permanentmagnetische Mittel durch die Dichtscheibe (7) selbst gebildet ist, welche zumindest in ausgewählten Bereichen aus einem permanentmagnetischen Material besteht oder permanentmagnetische Bestandteile aufweist.5. Sealing arrangement according to claim 1, characterized in that the permanent magnetic means by the sealing disc (7) itself is formed, which consists at least in selected areas of a permanent magnetic material or permanent magnetic components.
6. Dichtungsanordnung nach Anspruch 1 , dadurch gekennzeichnet, dass das permanentmagnetische Mittel durch ein magnetisches Element (12) gebildet ist, welches an der Dichtscheibe (7) befestigt ist.6. Sealing arrangement according to claim 1, characterized in that the permanent magnetic means by a magnetic element (12) is formed, which is fixed to the sealing disc (7).
7. Dichtungsanordnung nach Anspruch 6, dadurch gekennzeichnet, dass das magnetische Element (12) durch Kleben an dem Versteifungsring (11) der Dichtscheibe (7) befestigt ist.7. Sealing arrangement according to claim 6, characterized in that the magnetic element (12) is fixed by gluing to the stiffening ring (11) of the sealing disc (7).
8. Dichtungsanordnung nach Anspruch 6, dadurch gekennzeichnet, dass das magnetische Element (12) durch magnetische Kräfte an dem Versteifungsring (11) der Dichtscheibe (7) gehalten ist. 8. Sealing arrangement according to claim 6, characterized in that the magnetic element (12) by magnetic forces on the stiffening ring (11) of the sealing disc (7) is held.
9. Dichtungsanordnung nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass das magnetische Element (12) in der Dichtscheibe (7) aufgenommen ist.9. Sealing arrangement according to one of claims 6 to 8, characterized in that the magnetic element (12) is received in the sealing disc (7).
10. Dichtungsanordnung nach Anspruch 9, dadurch gekennzeichnet, dass das magnetische Element (12) in eine Elastomerschicht der Dichtung eingespritzt ist.10. Sealing arrangement according to claim 9, characterized in that the magnetic element (12) is injected into an elastomer layer of the seal.
11. Dichtungsanordnung nach Anspruch 9 oder 10, dadurch gekenn- zeichnet, dass das magnetische Element (12) in dem Versteifungsring (11) der Dichtscheibe aufgenommen ist.11. Sealing arrangement according to claim 9 or 10, characterized in that the magnetic element (12) is received in the stiffening ring (11) of the sealing disc.
12. Dichtungsanordnung nach zumindest einem der Ansprüche 2 bis 11 , dadurch gekennzeichnet, dass der Versteifungsring (11) und/oder die Dichtscheibe (7) eine oder mehrere axiale Ausnehmungen beziehungsweise Taschen zur Aufnahme anhaftender ferromagnetischer Partikel aufweisen.12. Sealing arrangement according to at least one of claims 2 to 11, characterized in that the stiffening ring (11) and / or the sealing disc (7) have one or more axial recesses or pockets for receiving adhering ferromagnetic particles.
13. Dichtungsanordnung nach Anspruch 12, dadurch gekennzeichnet, dass zur weitestgehenden Begrenzung der Anhaftungen ferromagnetischer Partikel auf der axialen Ausnehmungen beziehungsweise Taschen der Magnetismus ausschließlich auf diese Bereiche beschränkt oder in diesen Bereichen erhöht ist.13. Sealing arrangement according to claim 12, characterized in that for the most part limiting the adhesion of ferromagnetic particles on the axial recesses or pockets of the magnetism is limited exclusively to these areas or increased in these areas.
14. Dichtungsanordnung nach zumindest einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass das Wälzlager (1) ein einreihiges oder mehrreihiges Wälzlager (1) in Form eines Fest- oder Loslagers ist.14. Sealing arrangement according to at least one of claims 1 to 13, characterized in that the rolling bearing (1) is a single-row or multi-row roller bearing (1) in the form of a fixed or floating bearing.
15. Dichtungsanordnung nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass das Wälzlager (1) ein schmutzgeschütztes Wälzlager (1) eines Kraftfahrzeuggetriebes ist. 15. Sealing arrangement according to one of claims 1 to 14, characterized in that the rolling bearing (1) is a dirt-resistant rolling bearing (1) of a motor vehicle transmission.
16. Wälzlager, umfassend zumindest einen Lageraußenring (2), zumindest einen Lagerinnenring (3) sowie zwischen denselben in Laufbahnen (4, 5) geführte Wälzkörper (6), wobei dem Wälzlager (1) an zumindest einer Stirnseite wenigstens eine, einen Versteifungsring (11) aufweisende Dichtscheibe (7) zugeordnet ist, dadurch gekennzeichnet, dass das Wälzlager (1) eine Dichtungsanordnung nach einem der Ansprüche 1 bis 15 aufweist. 16 rolling bearing, comprising at least one bearing outer ring (2), at least one bearing inner ring (3) and between them in raceways (4, 5) guided rolling elements (6), wherein the rolling bearing (1) at least one end face at least one, a stiffening ring ( 11) having associated sealing disc (7), characterized in that the rolling bearing (1) has a seal arrangement according to one of claims 1 to 15.
PCT/DE2007/001112 2007-05-15 2007-06-23 Sealing arrangement for a rolling bearing WO2008138281A1 (en)

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WO2013001329A1 (en) * 2011-06-28 2013-01-03 Aktiebolaget Skf Sealed bearing assembly with magnet on sealing disc to attract metallic particles
WO2013110334A1 (en) * 2012-01-26 2013-08-01 Aktiebolaget Skf Rolling bearing assembly having magnetic and/or electronic elements
US20140199011A1 (en) * 2011-03-24 2014-07-17 Jean-Baptiste Magny Rolling bearing, notably used in a wind turbine
DE102013021748A1 (en) * 2013-12-20 2015-06-25 Sew-Eurodrive Gmbh & Co Kg Sealing arrangement for a rolling bearing and gearbox with a sealing arrangement for a rolling bearing of the transmission
WO2015167708A1 (en) * 2014-05-01 2015-11-05 Schaeffler Technologies AG & Co. KG Double lip axial radial bearing seal
CN107327496A (en) * 2017-08-11 2017-11-07 南通山口精工机电有限公司 A kind of miniature bearing sealing dust-proof cover
ES2705440R1 (en) * 2016-04-06 2019-04-11 Laulagun Bearings S L DEVICE FOR CLEANING FERROMAGNETIC BEARING PARTICLES AND CLEANING PROCEDURE

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DE102010019442A1 (en) 2010-05-05 2011-11-10 Schaeffler Technologies Gmbh & Co. Kg Rolling bearing with integrated seal
DE102016222544A1 (en) * 2016-11-16 2018-05-17 Schaeffler Technologies AG & Co. KG Sealing disk with a superhydrophobic surface

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US20140199011A1 (en) * 2011-03-24 2014-07-17 Jean-Baptiste Magny Rolling bearing, notably used in a wind turbine
US9188154B2 (en) * 2011-03-24 2015-11-17 Aktiebolaget Skf Rolling bearing, notably used in a wind turbine
WO2013001329A1 (en) * 2011-06-28 2013-01-03 Aktiebolaget Skf Sealed bearing assembly with magnet on sealing disc to attract metallic particles
WO2013110334A1 (en) * 2012-01-26 2013-08-01 Aktiebolaget Skf Rolling bearing assembly having magnetic and/or electronic elements
DE102013021748A1 (en) * 2013-12-20 2015-06-25 Sew-Eurodrive Gmbh & Co Kg Sealing arrangement for a rolling bearing and gearbox with a sealing arrangement for a rolling bearing of the transmission
WO2015167708A1 (en) * 2014-05-01 2015-11-05 Schaeffler Technologies AG & Co. KG Double lip axial radial bearing seal
US9528554B2 (en) 2014-05-01 2016-12-27 Schaeffler Technologies AG & Co. KG Double lip axial radial bearing seal
ES2705440R1 (en) * 2016-04-06 2019-04-11 Laulagun Bearings S L DEVICE FOR CLEANING FERROMAGNETIC BEARING PARTICLES AND CLEANING PROCEDURE
CN107327496A (en) * 2017-08-11 2017-11-07 南通山口精工机电有限公司 A kind of miniature bearing sealing dust-proof cover

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