WO2014037193A1

WO2014037193A1 - Lubricant outlet for a bearing

Info

Publication number: WO2014037193A1
Application number: PCT/EP2013/066950
Authority: WO
Inventors: Jesko-Henning Tanke; Johannes Ullmann
Original assignee: Aktiebolaget Skf
Priority date: 2012-09-06
Filing date: 2013-08-14
Publication date: 2014-03-13

Abstract

Embodiments of the present invention relate to a device (10) for a bearing (12) having an outer bearing ring (14) and an inner bearing ring (16), wherein the outer bearing ring and the inner bearing ring undergo a movement relative to one another about an axis of rotation during operation of the bearing, the bearing having a circumferential radial shaft seal (18) between the outer bearing ring and the inner bearing ring in order to prevent escape of lubricant from the bearing. The device has at least one lubricant outlet (20), which is arranged axially outside the circumferential radial shaft seal, on the periphery of the bearing ring that does not rotate during operation of the bearing.

Description

Lubricant drainage for a bearing Embodiments relate to devices and methods for removing lubricant from bearings, in particular for removing lubricant from sealed bearings, as described, for example, in US Pat. can be used in wind turbines.

Bearings such as e.g. Rolling bearings conventionally comprise a bearing inner ring (inner ring), a bearing outer ring (outer ring) and rolling elements rolling therebetween in a rolling space, such as e.g. Spheres, rollers, needles, cones, etc. The rolling elements are usually performed by so-called bearing cages in designated Lagerkäfigtaschen and kept at a distance to each other. Depending on the embodiment and application rolling bearings can be used with or without sealant. Known sealing concepts for rolling bearings can usually ensure reliable protection of the rolling bearing from dirt and contamination.

Rolling bearings and in particular large rolling bearings (large bearings with an inner diameter d> 1 m) can be protected, for example by sliding sealing rings. These are essentially radial shaft seals, possibly with an upstream dust protection lip, which are held in a defined position relative to the actual bearing by means of additional carrier parts, for example of cast material. Such sliding seals usually have an individually tailored to the particular camp design. In such a sliding sealing concept, the radial shaft seal between bearing outer ring and bearing inner ring is intended to prevent a lubricant discharge from the rolling body space or rolling space, in which the rolling elements rotate, from the bearing. Nevertheless, it may happen due to various circumstances, such as aging of the seal or their operating conditions that more lubricant, such as grease or oil, exits as permitted by the radial shaft seal from the rolling room, resulting in dirty operating conditions and thus to a more frequent replacement of the seals can lead. The replacement of the seals is very expensive and expensive, especially in large-scale warehouses for wind energy or wind turbines, especially in the offshore sector.

It is therefore an object of the present invention to eliminate or reduce this problem and to develop and improve the state of the art sealing concepts for bearings.

This object is achieved by a device for a bearing, in particular for a rolling bearing, with the features of independent claim 1.

According to one aspect of the present invention, there is provided an apparatus for a bearing (e.g., a rolling bearing) comprising a bearing outer race and a bearing inner race. The bearing outer ring and the bearing inner ring perform in or during the operation of the bearing relative movement about an axis of rotation to each other, wherein the bearing between the bearing outer ring and the bearing inner ring has a circumferential radial shaft seal to prevent lubricant discharge from the bearing or from the rolling space. By the rotation axis, an axial direction is defined, which extends in the direction of the axis of rotation. According to exemplary embodiments, the device comprises at least one lubricant outlet or outflow, which is arranged in the axial direction outside the rotating radial shaft seal on the circumference of the bearing ring (outer ring or inner ring) which does not rotate during operation of the bearing.

In embodiments, so axially outside the radial shaft seal from the radial shaft seal leaking lubricant can be absorbed or removed, so that there is a cleaning effect for the bearing. In this case, according to some embodiments, the lubricant intake or the lubricant outlet can be arranged (at least partially) between the radial shaft seal and an axially still further outward sealing lip (eg dust protection lip). In addition, in some embodiments, a rotating Schmiermittelabstrei- fer be provided, which cooperates with the at least one lubricant drain and which is designed to strip during operation of the bearing from the radial shaft seal axially outwardly exiting lubricant in the at least one lubricant outlet and thus the space to clean lubricant even more thoroughly outside the radial shaft seal than without a wiper. The stripped lubricant or - medium can then controlled and pressure-free flow through an opening of the lubricant outlet, where it can be forwarded and / or collected. According to a further aspect of the present invention, a wind power plant with a lubricant outlet device according to the invention is proposed.

Further advantageous developments and embodiments are the subject of the following description and the dependent claims.

Embodiments of the present invention may provide more secure scheduling of maintenance intervals for customers of sealed bearings, particularly rolling bearings, as well as longer maintenance intervals of (sliding) seals. Furthermore, embodiments also generally result in cleaner operating and working conditions for bearings and thus fewer hazards, such as e.g. a slide out.

Embodiments of the present invention will now be explained below with reference to the accompanying figures. Show it:

Fig. La, a first embodiment of a Schmiermittelableitvorrichtung for a

Bearing with a rotating bearing outer ring and a stationary or non-rotating bearing inner ring; Fig. Lb is a schematic side view of a bearing inner ring with a lubricant outlet according to an embodiment; 2a shows a schematic plan view of a lubricant scraper according to an embodiment which is inclined relative to a rotational direction of a bearing ring;

2b is a schematic plan view of a relative to the rotational direction of a bearing ring on both sides beveled Schmiermittelabstreifer.

3a is a schematic representation of a device according to an embodiment with a recess introduced in a bearing ring edge or cutout as a lubricant outlet;

Fig. 3b is a schematic illustration of an embodiment in which the at least one lubricant drain has a lubricant drain tube for diverting leaked lubricant from the bearing; a schematic representation of an embodiment in which the lubricant flow is formed in a coupled with the end face of the non-rotating bearing ring and separate attachment; in a schematic representation of various alternatives for centering the attachment of FIG. 4a;

Fig. 5a shows another embodiment of a Schmiermittelableitvorrichtung for a

Bearing with a stationary bearing outer ring and a rotating bearing inner ring;

5b shows a further embodiment of a device for a roller bearing with a rotating bearing inner ring and stationary bearing outer ring;

Fig. 6a shows a still further embodiment of a device with lubricant drain, which is formed by an axial bore or recess in the stationary bearing outer ring; 6b is a schematic side view of a device according to an embodiment with a mounted on the stationary bearing outer ring Schmiermittelabstreifer and rotating bearing inner ring. and FIG. 7 shows various alternative embodiments of a lubricant scraper s.

In the following description of the various embodiments of the present invention, like reference numerals may denote functionally identical or functionally similar components or elements.

Fig. La shows a schematic representation of a first embodiment of the present invention. It is a device 10 for a in Fig. La only partially shown roller bearing with a (not shown) bearing outer ring and a bearing inner ring 16 is shown. As is generally conventional, the bearing outer race and the bearing inner race 16 perform relative movement about an axis of rotation with respect to each other about an axis of rotation defining an axial direction. Between the bearing outer ring and the bearing inner ring 16, the rolling bearing has an annular circumferential radial shaft seal 18 to prevent a lubricant discharge from the rolling bearing or the Wälzraum, in which the rolling elements of the bearing rotate.

The radial shaft seal or the radial shaft seal 18, for example, have a cylindrical outer jacket made of sheet steel or elastomeric material that seals the rolling bearing statically, ensures the required tight fit of the radial shaft seal 18 in the outer ring or the proper assembly of the sealing ring 18 allows and a radially on Inner ring 16 abutting sealing lip made of elastomeric material, which takes over a dynamic and static sealing of the bearing. The sealing lip of the radial shaft seal 18 may have a formed by pressing, cutting or grinding sealing edge, which is usually pressed by an annular tension spring 19 with a defined radial force against a Mantelaußenfiäche 26 of a shaft or inner ring 16. The radially inner sealing edge on the sealing lip and the Gegenlauffiä- che 26 on the inner ring 16 (or a shaft) form with the main functional area of the radial shaft seal 18th

An additional, relative to the radial shaft seal 18 axially further outward sealing or protective lip 22, which can protect the actual lubricant sealing point against dust and smaller solid impurities, may also be part of a sealing ring.

According to the embodiment shown in FIG. 1 a, the device or arrangement 10 may have at least one lubricant outlet 20 in the bearing inner ring 16 (which may also be a shaft) which is viewed in the axial direction (ie in the direction of the bearing rotation axis ) outside (here: right) is arranged by the rotating radial shaft seal 18 on the circumference of the non-rotating bearing ring 16 during operation of the rolling bearing. In the embodiment shown in FIG. 1a, the at least one lubricant outlet 20 is in the axial direction between the annular circumferential radial shaft seal 18 and the axially outer peripheral sealing seal. Dust protection lip 22 is arranged.

According to Fig. La, the non-rotating bearing inner ring or the shaft 16 is correspondingly extended in the axial direction, so that the lubricant outlet 20 can be formed in an axial end portion of the inner ring or the shaft 16. In the embodiment shown in Fig. La, the lubricant outlet 20 in the bearing inner ring 16 comprises at least one radial bore 30 to the lubricant during operation of the bearing from the radial shaft seal 18 leaking lubricant from the (Wälzkörper-) tread 26 of the bearing inner ring 16 away in the radial direction enable. The diameter D of the bore 30 depends essentially on the bearing size. For large bearings with diameters in the range of 1.5 to 4 meters, the diameter D, for example, greater than or equal to a metric ISO thread M24. The device 10 shown in FIG. 1 is further characterized in that in the axial direction outside of the rotating radial shaft seal 18 with the bearing outer ring at least one cooperating with the at least one lubricant outlet 20 Schmiermittelabstreifer 38 is provided. This is optional in embodiments. The Schmiermittelabstreifer 38 is formed to be in the operation of the bearing of the Radial shaft seal 18 leaking lubricant from the lateral surface 26 in the at least one lubricant outlet 20 strip. The stripping is done by the relative movement of Schmiermittelabstreifer 38 and lubricant outlet 20, caused by the rotation of the bearing.

The Schmiermittelabstreifer 38, which may be formed for example of a felt or a sponge-like material extends in the radial direction up to the surface to be cleaned 26, in which the lubricant inlet opening of the lubricant outlet 20 is located. Through this direct contact with the surface 26 results in the rotation of the bearing outer ring relative to the fixed bearing inner ring 16 here a sweeping or wiping action, by means of which exiting and located on the surface 26 lubricant in the lubricant outlet 20 and its bore 30 is conveyed. As can be seen from Fig. La, in embodiments of the Schmiermittelabstreifer 38 axially between the rotating radial shaft seal 18 and the axially outer circumferential sealing or dust protection lip 20 may be fixed or clamped. This fixation can be effected for example by means of a contact force caused by a screwing or fixing plate (retainer) 23. The fi xierungsblech 23 can be screwed with the bearing outer ring, not shown here o- otherwise be connected. The dust protection lip 22 may comprise at its radially inner end an axially outwardly directed sealing edge 24, which is in direct sealing contact with the surface 26, which is assigned to the bearing inner ring or the shaft 16 and rotates relative to the sealing lip 22, in order to keep dust particles from the outside. By the sealing edge 24, a dust or particle entry can be prevented from the outside.

As will be described later, the lubricant scraper 38 may have various shapes to convey the lubricant into the lubricant drain 20. In the exemplary embodiment shown in FIG. 1a, a wiper edge 39 of the lubricant wiper 38, ie, the edge which is in operative contact with the surface 26, is formed perpendicular to the direction of rotation. Figures 2a and 2b show other embodiments in which the radially inner scraper edge 39 of the Schmiermittelabstreifers 38 is arranged obliquely to the direction of rotation. Close grazing edge 39 and rotation direction, for example, an acute angle α (<90 °), so the lubricant can be better prevented from the dust protection lip 22 and its sealing edge 24. In other words, by an acute angle α, the lubricant or fat in the direction of radial shaft seal 18 are pushed back. In the frustoconical cross-sectional area of the lubricant wiper 38, which is shown in the plan view of FIG. 2b, an acute angle α results between the direction of rotation and the wiping edge 39 in both directions of rotation, so that grease can be forced back to the radial shaft seal 18 independently of the direction of rotation. Furthermore, with this shaping, the lubricant scraper 38 can be better clamped between the radial shaft seal 18 and the dust seal 22.

Fig. Lb shows a bearing inner ring 16 with at least one lubricant outlet 20 in a schematic side view. The lubricant outlet 20 here comprises a radial bore 30, which is followed by a counterbore 31 in the direction of the running or lateral surface 26, which can be introduced, for example, by means of a disk milling cutter. The cutout 31 and the bore 30 thus provide a kind of funnel, into which the lubricant, in particular by means of the scraper 38, can be conveyed or flowed in by the running surface 26. At the radially inner outlet opening of the bore 30, for example, a collecting container for the collected lubricant can be located. As is schematically indicated in FIG. 1 b, a plurality of lubricant outlets 20 can also be located in the circumferential direction in the non-rotating bearing ring or component of the bearing in order to allow a uniform and increased lubricant outflow. In any case, it is advantageous if the at least one lubricant outlet 20 extends in the installed state of the roller bearing and also in its operation (as perpendicular as possible) to the earth's surface in order to exploit the gravitational force for lubricant collection. This means that in the embodiment described with reference to FIG. La with a fixed inner ring, the at least one lubricant outlet 20 with its lubricant inlet opening in the highest position, i. at 12 o'clock position, ie substantially perpendicular from top to bottom.

3a shows a device 10 for rolling bearings with rotating bearing outer ring and fixed bearing inner ring 16, which differs substantially from the embodiment of Fig. La by the design of the lubricant outlet 20. Here the lubricant outlet 20 is not formed as a bore through the bearing inner ring 16, but as a recess 32 at the edge of the tread 26 and the end face 28, wherein the recess 32 to the tread 26 and the end face 28 of the bearing ring 16 is opened. The recess 32 may be milled into the edge of the bearing ring 16 between the tread 26 and end face 28. By this shaping, the lubricant can flow in the direction shown by the dashed arrow from the running surface via the recess 32 to the outside and be collected in accordance with some embodiments of a collecting container. By the embodiment of Fig. 3a, in particular material for the bearing inner ring 16 can be saved, since this does not have to extend in the axial direction as far outward, as is the case with the embodiment of FIG. La. This can lead to a significant cost savings, especially for large bearings, since bearing rings or shafts are often made of elaborately hardened steel.

The embodiment of Fig. 3a allows a different arrangement of the axially outer sealing lip 22 and its sealing edge 24. In contrast to the Ausführungsbei- game of Fig. La, the sealing lip 22 according to FIG. 3a at its radially inner end a axially inwardly facing sealing edge 24 which communicates with the bearing inner ring 16 associated and relative to the sealing lip 22 rotating end face 28 in direct sealing contact, unless the sealing edge 24 just passes through a recess 32. In this case, the sealing edge is in the air - without contact with the end face 28. To operate in the rolling bearing, ie during rotation, then again to allow a smooth transition from recess 32 to the end face 28, it may be advantageous to round off the edges of the recess 32 to the end face 28 in order to preserve the (elastomeric) sealing edge 24 of the sealing lip 22.

FIG. 3 b shows an embodiment of the device 10 according to FIG. 3 a, which is widened with respect to FIG. 3 a around a lubricant outflow tube 36 located in the lubricant outlet 20. By the angled or bent lubricant drain pipe 36, the conveyed into the lubricant outlet 20 lubricant can be better dissipated or led away from the camp. Various views of a possible angled lubricant drain tube 36, for example can be used as a plastic insert in the recess 32 are shown in Fig. 3b, right.

Another possible embodiment of the device 10 is shown in FIG. 4a.

The embodiment of FIG. 4a differs from the embodiment described with reference to FIG. 1a in particular through the lubricant outlet 20. According to FIG. 4 a, the lubricant outlet is formed by a separate component molded onto the end face 28 of the bearing inner ring 16. The coupled to the end face 28 component or coupled to the end face 28 separate lubricant outlet 20 may be connected, for example by means of screws 21 or comparable fastening means to the bearing inner ring 16. The separate lubricant drain attachment or attachment can, according to embodiments, extend annularly on the likewise annular end face 28 of the bearing inner ring 16. If the bearing inner ring 16 does not rotate, i. if it is fixed, the bore 30 of the separate lubricant outlet 20 can advantageously again be perpendicular to the 12 o'clock position in order to optimally utilize the gravitational force for the lubricant outflow. At this point it should be mentioned that the separate lubricant drain attachment can be made for example of steel, aluminum or plastic, which can mean a cost advantage due to material savings compared to the more material-intensive embodiment of Fig. La. As can be seen in FIG. 4 a, the axial dimensions of the bearing inner ring 16 can be significantly reduced compared to FIG. 1 a.

FIG. 4b shows two possible alternatives for fixing or centering the annular attachment for the lubricant outlet 20. FIG. 4b at the top shows a variant in which the attachment is centered in the end face 28 by means of corresponding recesses and undercuts 17. 4b below shows an alternative variant, in which the attachment for the lubricant outlet 20 by means of pins / bolts 25, in particular at least two pins, on the bearing inner ring 16 and its end face 28 is centered. Of course, other alternatives for fixing and centering the lubricant drain attachment are conceivable.

While in the foregoing embodiments with fixed inner ring 16 and rotating outer ring have been described, relate to the figures 5a to 6b Ausfüh- Examples in which instead of the inner ring 16 rotates and the bearing outer ring 14 is fixed.

5a shows an embodiment of the device 10, in which at least one lubricant outlet 20 is arranged in the axial direction outside the rotating radial shaft seal 18 on the circumference of the bearing outer ring 14 which is not rotating during operation of the rolling bearing. In this case, the lubricant outlet 20, similar to Fig. 4a, formed in a coupled with the end face of the bearing outer ring 14, separate attachment. As a result, the axial dimensions of the bearing outer ring 14 of the bearing 12 can be kept low, which material savings are possible, which can be particularly significant for large bearings. The separate attachment with the lubricant outlet 20 or the bore 30 provided for this purpose can, for example, be made of steel, aluminum or plastic again. Fixing or fixing means can be selected similar to the embodiment already described with reference to FIG. 4a.

As shown in Fig. 5a, the inner ring 16 rotates and the outer ring 14 is fixed, the lubricant outlet 20 together with the bore 30 can be at the periphery of the bearing at 6 o'clock position (i.e., below). In other words, then extends the lubricant outlet 20 in the installed state of the rolling bearing on the bearing outer ring to the earth's surface and thus makes optimal use of the gravitational force for the lubricant drain.

5b shows an embodiment in which the lubricant outlet 20 and the bore 30 is introduced directly into the material of the bearing outer ring 14, analogous to the embodiment of Fig. La. Again, a funnel-like cutout 31 may be provided at the radially inner end of the bore to facilitate the large-scale collection of lubricant. Here too, the lubricant outlet 20 or its bore 30 can advantageously be at the lowest point of the bearing outer ring 14, i. at 6 o'clock position to allow for optimal lubricant drainage. In addition, of course, even more holes 30 may be arranged on the circumference of the outer ring 14, depending on how high an expected lubricant leakage.

Fig. 6a shows an embodiment of the device 10, wherein the at least one lubricant outlet 20 through an axially extending bore 30 and 32 cutout in the non-rotating bearing outer ring 14 is formed. The extending in the axial direction recess 30, 32 forms a groove-like depression in the shell of the bearing outer ring 14, in which from the seal 18 leaking lubricant can be collected. Between the radial shaft seal 18 and the axially outer sealing lip 22, a clamping ring 33 is arranged, which has a corresponding recess radially within the lubricant outlet 20, 30, 32 to a transport of lubricant into the recess 30, 32 in the bearing outer ring 14th to allow (see Fig. 6a, right). Although this does not explicitly illustrate the figures, it is again advantageous to arrange the lubricant outlet 20 or the recess 30, 32 at the lowermost point of the bearing outer ring 14, ie at the 6 o'clock position. As indicated in Fig. 6a, right, the captured lubricant can pass through a proboscis or nozzle 37 to the outside.

FIG. 6b shows a rolling bearing arrangement with a fixed outer ring 14 and a rotating bearing inner ring 16 in a schematic side view. In contrast to the exemplary embodiments described in the preceding with reference to FIGS. 5 a to 6 a, the embodiment shown in FIG. 6 b has a lubricant scraper 38 (eg felt) fixed to the stationary bearing outer ring 14, extending in the radial direction up to the surface 26 of the bearing inner ring 16 extends in order to convey lubricant from there into the lubricant outlet 20 and its bore 30 and strip. For this, one should again imagine that the lubricant outlet 20 or the bore 30 at 6 o'clock position, i. directed downwards, is located on the fixed bearing outer ring 14 and thus the lubricant can flow from top to bottom. In other words, you can imagine the representation of Fig. 6b rotated by 180 °.

The Schmiermittelabstreifer 38 is therefore preferably arranged in the circumferential direction at the edge of the bore 30 so that lubricant can flow as freely as possible from the scraper 38 along the bore 30. According to the embodiment shown schematically here, the radially extending lubricant wiper 38 can be connected to the radially inner circumferential surface of the bearing outer ring 14 by an angle-shaped holding element 40.

It will be appreciated that in general, the at least one lubricant drain 20 will rotate relative to the at least one lubricant scraper 38 during operation of the bearing upon encounter of lubricant scraper 38 (or its scraper edge 39) and lubricant drain 20, to convey lubricant from the surface 26 into the lubricant drain 20. According to FIG. 6b, during operation of the bearing 12, the at least one (stationary) lubricant scraper 38 rotates relative to the (rotating) bearing inner race 16 about the bearing inner race 16 so as to lubricate the lubricant outlet through rotation and direct contact with the surface 26 of the bearing inner race 16 20 of the bearing outer ring 14 to convey.

FIG. 7 shows various variants of the additional dust or sealing lip 22, which are designed, on the one hand, to retain dust from axially outside and, on the other hand, to retain lubricant from axially inward. For this purpose, the sketched in Fig. 7 sealing lips 22 at its radially inner end in each case both an axially inwardly and axially outwardly facing sealing edge 24, with the bearing inner ring 16 associated and rotating relative to the sealing lip 22 surface 26 and / or 28 are in direct sealing contact.

It should also be noted that the outflow of the lubricating medium or agent in all embodiments can be supported by a coupled to the lubricant outlet 20 pump.

The features disclosed in the foregoing description, the claims and the drawings may be of importance both individually and in any combination for the realization of the invention in its various forms. Exemplary embodiments can be used, for example, for large bearings used in wind power plants. It should also be noted that embodiments can be used not only for rolling bearings, but also for plain bearings.

Although some aspects have been described in the context of a device, it will be understood that these aspects also constitute a description of a corresponding method such that a block or component of a device may also be referred to as a corresponding method step or as a feature of a method step, such as Production of the device, to understand. Similarly, aspects described in connection with or as a procedural step also Writing a corresponding block or detail or feature of a corresponding device.

The embodiments described above are merely illustrative of the principles of the present invention. It will be understood that modifications and variations of the arrangements and details described herein will be apparent to others of ordinary skill in the art. Therefore, it is intended that the invention be limited only by the scope of the following claims, not by the specific details presented in the description and explanation of the embodiments herein.

REFERENCE NUMBER LIST 10 Apparatus for a bearing with a lubricant outlet according to various embodiments

12 bearings, in particular rolling bearings

14 bearing outer ring

16 bearing inner ring

18 Radial shaft seal or radial shaft seal

19 spring washer

20 lubricant outlet

21 fastening means, in particular screw

22 Sealing lip or dust protection lip

23 bolting plate

24 sealing edge

25 pin or bolt

26 running surface or radially outer circumferential surface of the bearing inner ring 28 end face of the bearing inner ring or the shaft

30 hole

31 Funnel-shaped recess or cut-out

32 recess

33 clamping ring

34 Separate attachment or attachment for lubricant outlet

36 lubricant drain tube

37 trunk / neck

38 lubricant scraper

39 wiper edge

40 fasteners for lubricant scraper, retaining element

Claims

Patent claims

1. A device (10) for a bearing (12) with a bearing outer ring (14) and a bearing inner ring (16), wherein the bearing outer ring (14) and the bearing inner ring (16) during operation of the bearing (12) relative to each other about an axis of rotation wherein the bearing (12) between the bearing outer ring (14) and the bearing inner ring (16) has a circumferential radial shaft seal (18) to prevent a lubricant discharge from the bearing (12), with the following feature: at least one lubricant outlet (20) which is arranged in the axial direction outside the rotating radial shaft seal (18) on the circumference of the bearing ring (14; 16) not rotating during operation of the bearing (12).

2. Device (10) according to claim 1, wherein the at least one lubricant outlet (20) in the axial direction between the rotating radial shaft seal (18) and an axially outer circumferential sealing lip (22) is arranged.

3. Device (10) according to claim 2, wherein the sealing lip (22) at its radially inner end an axially inwardly and / or outwardly-facing sealing edge (24) summarizes the one with the bearing inner ring (16) associated with and relatively to the sealing lip (22) rotating surface (26; 28) is in direct sealing contact.

4. Device (10) according to one of the preceding claims, wherein the at least one lubricant outlet (20) on the bearing outer ring (14) or bearing inner ring (16) extends in the radial direction to a lubricant discharge from a Wälzkörper- lauffiäche (26) away in radial To enable direction.

5. Device (10) according to one of the preceding claims, wherein the at least one lubricant outlet (20) comprises a radially extending bore (30) or recess (32).

6. Device (10) according to claim 5, wherein the bore (30) or recess (32) in the non-rotating during operation of the bearing (12) bearing ring (14; 16) is formed.

7. Device (10) according to claim 6, wherein the recess (32) to the end face (28) of the bearing ring (14; 16) is open to allow a lubricant outflow to the end face (28) out.

8. Device (10) according to claim 5, wherein the bore (30) or recess (32) in one with the end face (28) of the non-rotating bearing ring during operation of the bearing (14; 16) coupled to the attachment (34) is formed, wherein the attachment (34) is formed separately from the non-rotating bearing ring (14; 16).

The apparatus (10) of any one of the preceding claims, wherein the at least one lubricant drain (20) includes a lubricant drain tube (36) for directing the leaked lubricant away from the bearing (12).

10. Device (10) according to one of the preceding claims, wherein at least one lubricant outlet (20) extends in the installed state of the bearing (12) on the bearing outer ring (14) or bearing inner ring (16) towards the earth's surface.

11. Device (10) according to one of the preceding claims, wherein the device (10) has a with the at least one lubricant outlet (20) cooperating Schmiermittelabsaugpumpe.

12. Device (10) according to one of the preceding claims, further comprising:

at least one in the axial direction outside of the rotating radial shaft seal (18) mounted on the bearing outer ring (14) and with the at least one lubricant outlet (20) cooperating Schmiermittelabstreifer (38) which is adapted to the operation of the bearing (12) from the radial shaft seal (18) strip off escaping lubricant in the at least one lubricant outlet (20).

13. Device (10) according to claim 12, wherein the Schmiermittelabstreifer (38) extends in the radial direction up to a lubricant inlet opening (40) of the at least one lubricant outlet (20).

14. Device (10) according to claim 12 or 13, wherein the Schmiermittelabstreifer (38) is axially fixed between the rotating radial shaft seal (18) and an axially outer circumferential sealing lip (22).

15. Device (10) according to any one of claims 12 to 14, wherein the at least one lubricant outlet (20) during operation of the bearing (12) relative to the at least one Schmiermittelabstreifer (38) rotates to coincide with Schmiermittelabstreifer (38) and lubricant outlet (20) To carry lubricant into the lubricant outlet (20).

16. Device (10) according to one of claims 12 to 15, wherein the at least one Schmiermittelabstreifer (38) in the operation of the bearing (12) relative to the bearing inner ring (16) rotates about the bearing inner ring to rotate by the rotation and an immediate contact Surface (26) of the bearing inner ring (16) lubricant in the lubricant outlet (20) to convey.