DE102022002580A1 - Sealing device for a bearing arrangement and bearing arrangement with the sealing device - Google Patents

Abstract

A sealing device 1 for a bearing arrangement 30 is proposed. The sealing device 1 comprises an outer sealing ring 4 and an inner coaxial sealing ring 5, one of the sealing rings 4, 5 delimiting at least one collecting space 15a, 15b, preferably a first collecting space 15a and a second collecting space 15b, for collecting at least one medium 2a, 2b in sections . The sealing device 1 has a multiple function, by means of which trouble-free and low-wear operation of a rolling bearing device 31 of the bearing arrangement 30 can be ensured. The sealing device 1 can, in a first function, collect a first medium 2a in the first collecting space 15a and keep it away from the rolling bearing device 31 and, in a second function, can collect a second medium 2b in the second collecting space 15b and return it to the rolling bearing device 31.

Description

The invention relates to a sealing device for a bearing arrangement with an outer sealing ring and with an inner sealing ring, the sealing rings defining a main axis, the sealing rings being arranged coaxially with respect to the main axis and a radial distance being arranged between the sealing rings. One of the sealing rings is arranged to be rotationally fixed and the other sealing ring is arranged to be rotatable about the main axis. The invention also relates to a bearing arrangement with the sealing device.

Sealing devices in rolling bearings, which are intended to reduce the leakage of lubricant from the rolling bearing and thus ensure an adequate supply of lubricant to the rolling bearing, are already known from the prior art.

For example, the publication describes DE 112016002479 T5 a rolling bearing in which a lubricating grease moves axially from one side to the other side in an annular space between an inner ring and an outer ring. The rolling bearing has a first and a second seal. The first seal is disposed axially on one side of the annular space and has a first lip portion that forms a first labyrinth gap with the inner ring to prevent leakage of the grease. The second seal is disposed axially on the other side of the annular space and has a second lip portion that forms a second labyrinth gap with the inner ring to prevent grease leakage.

The invention is based on the object of providing a functionally expanded and friction-reduced sealing device for a bearing arrangement. This object is achieved by a sealing device for a bearing arrangement with the features of claim 1 and by a bearing arrangement with the sealing device with the features of claim 14. Preferred or advantageous embodiments of the invention emerge from the subclaims, the following description and/or the attached figures.

A sealing device for a bearing arrangement is proposed. The bearing arrangement includes a rolling bearing device, which is designed, for example, as a roller or ball bearing. The bearing arrangement can be integrated, for example, in a stationary transmission of a machine or in a movable transmission of a vehicle, for example a car, a commercial vehicle or on the train.

The sealing device has an outer sealing ring and an inner sealing ring. For example, the sealing rings are made of a metal alloy or a plastic. Each of the sealing rings defines a main axis. The sealing rings are arranged coaxially with respect to the main axis. Preferably, the sealing device can be arranged in front of the rolling bearing device in an axial direction related to the main axis or in an axial opposite direction. Here, the sealing device is preferably arranged coaxially to the rolling bearing device.

A radial distance is arranged between the sealing rings. One of the sealing rings is rotationally fixed and cannot rotate about the main axis. The other sealing ring is rotatable and can rotate around the main axis. For example, the rotationally fixed sealing ring is the outer sealing ring. In particular, the rotatably arranged sealing ring is the inner sealing ring. Preferably, the inner sealing ring can rotate radially within the outer sealing ring about the main axis. In particular, the outer sealing ring surrounds the inner sealing ring. Specifically, an outer peripheral surface of the inner seal ring and an inner peripheral surface of the outer seal ring are arranged opposite and/or directed toward each other.

It is provided within the scope of the invention that one of the sealing rings delimits at least one collecting space in sections. For example, the sealing ring is the rotation-proof sealing ring. The corresponding sealing ring preferably delimits two collecting spaces in sections, in particular an outer collecting space and an inner collecting space. Preferably, the collecting spaces are arranged next to one another and/or adjacent to one another in the axial direction. For example, the outer collecting space is arranged axially facing away from the rolling bearing device and the inner collecting space is arranged axially facing the rolling bearing device when the sealing device forms a part of the bearing arrangement.

At least one medium, for example a first medium and a second medium, can be collected in the at least one collecting space. For example, the at least one medium is a liquid or viscous medium. Preferably, water and/or a water mixture forms the first medium and a lubricant, for example oil or fat, forms the second Medium. Optionally, the water and/or water mixture can be collected in the outer collecting space. In particular, the lubricant can be collected in the inner collecting space.

The water and/or the water mixture can, for example, hit the bearing arrangement by means of a steam jet or in a car wash when cleaning the machine or the vehicle in which the bearing arrangement is integrated with the rolling bearing device and the sealing device. In particular, the machine and/or the vehicle and thus also the bearing arrangement are out of operation during cleaning. The lubricant can be supplied to the rolling bearing device for lubrication and friction reduction during operation. The lubricant is preferably distributed in the rolling bearing device, and it can partially emerge from it, for example in the axial direction, in particular towards the sealing device.

The possibility of collecting the at least one medium in the collecting spaces has the advantage that the first medium, for example the water and/or water mixture, can be kept away from the rolling bearing device and cannot impair its function. On the other hand, the second medium, for example the lubricant, can be retained in the rolling bearing device and/or fed back to it in order to maintain the functionality of the rolling bearing device.

In a possible embodiment of the invention, the rotation-proof sealing ring has several wall sections. For example, one, several or all wall sections in a cross section of the rotation-proof sealing ring have a 90° contour, whereby they can be rectangular in cross section. Alternatively or optionally in addition, one, several or all wall sections have an L-contour or essentially an L-contour in the cross section of the rotation-proof sealing ring. The wall sections preferably delimit the at least one collecting space in sections. In particular, the wall sections are arranged on a circumferential side of the rotation-proof sealing ring and/or form it in sections. The circumferential side is in particular the inner circumferential side of the rotation-proof sealing ring directed radially towards the rotating sealing ring.

In a further possible embodiment of the invention, three wall sections are provided on the circumferential side of the rotation-proof sealing ring. Preferably, the wall sections are arranged spaced apart from one another in the axial direction. In particular, the rotation-proof sealing ring has an outer wall section, a middle wall section and an inner wall section. It is preferred that the outer wall section and the middle wall section delimit the outer collecting space in sections. Preferably, the inner wall section and the middle wall section delimit the inner collecting space in sections. In particular, the middle wall section separates the outer collecting space from the inner collecting space.

A possible embodiment of the invention provides that the rotation-proof sealing ring has at least one channel. Preferably, the at least one channel runs through at least one of the wall sections. In particular, the at least one medium can be discharged from the at least one collecting space through the at least one channel. It is preferred to arrange the rotation-proof sealing ring and/or to align it about the main axis in such a way that the at least one channel is arranged in a so-called 6 o'clock position. As a result, the at least one medium can move out of the at least one collecting space through the at least one channel due to the gravitational force.

In a further possible embodiment of the invention, the rotation-proof sealing ring has two channels, in particular an outer channel and an inner channel. Preferably, the outer channel runs through the outer wall section and the inner channel through the inner wall section. As a result, the first medium collected in the outer collecting space, in particular the water and/or water mixture, can be discharged through the outer channel to the outside of the sealing device, in particular away from the rolling bearing device. Preferably, the second medium collected in the inner collecting space, in particular the lubricant, can be discharged from the inner collecting space, with a discharge direction directed towards the rolling bearing device. As a result, the second medium can be fed back to the rolling bearing device when the sealing device forms part of the bearing arrangement.

A possible implementation of the invention provides that at least one access to the at least one collecting space is formed by the radial distance between the outer sealing ring and the inner sealing ring. The at least one access is, for example, at least a gap between the inner circumferential surface of the outer sealing ring and an outer circumferential surface of the inner sealing ring. For example, three accesses are formed, in particular an external access, a middle access and an inner access. The external access preferably leads from outside the sealing device into the outer collecting space and the inner access leads from outside the Sealing device, in particular on the rolling bearing device side, into the inner collecting space. The middle access preferably connects the outer collecting space with the inner collecting space.

For example, the external access is an external gap between the outer wall portion of the rotation-proof seal ring and a peripheral surface, preferably the outer peripheral surface, of the rotatable seal ring. For example, the inner access is an inner gap between the inner wall portion of the rotation-proof sealing ring and the peripheral surface, preferably the outer peripheral surface, of the rotatable sealing ring. Optionally, the middle access is a middle gap between the middle wall section of the rotation-proof sealing ring and the peripheral surface, preferably the outer peripheral surface, of the rotatable sealing ring.

In a further possible implementation of the invention, the rotatable sealing ring has a protective device. The protective device is designed to prevent the at least one medium from penetrating into the at least one collecting space from outside the sealing device through the at least one access. In particular, the protective device is intended to reduce a quantity and/or a volume of the at least one medium that threatens and/or can penetrate through the access into the at least one collecting space. Two protective devices, in particular an external protective device and an internal protective device, are preferably provided. Preferably, the external protective device can reduce and/or prevent the penetration of the first medium, in particular the water and/or water mixture, through the external access into the external collecting space. In particular, the internal protective device can reduce and/or prevent the penetration of the second medium, for example the lubricant, through the internal access into the internal collecting space.

For example, the at least one protective device comprises at least one wall barrier. The at least one wall barrier in particular forms a component of the inner sealing ring. Preferably, the at least one wall barrier comprises at least one axial end face of the rotatable sealing ring. For example, the outer protective device comprises an outer wall section, which includes an outer axial end face of the rotatable sealing ring, which in particular faces away from the rolling bearing device. Optionally, the inner protective device comprises an inner wall barrier, which includes an inner axial end face of the rotatable sealing ring, which in particular faces the rolling bearing device.

In a possible constructive implementation of the invention, the at least one wall barrier has a drip nose, from which the at least one medium hitting the wall barrier can drip outside the at least one collecting space. In particular, the outer wall barrier has an outer drip nose, from which the first medium striking the outer wall barrier, e.g. the water and/or water mixture, can drip outside the outer collecting space, in particular outside the sealing device and/or the bearing arrangement. In particular, the inner wall barrier has an inner drip nose, from which the second medium striking the inner wall barrier, in particular the lubricant, drips outside the inner collecting space and can be fed back to the rolling bearing device if the sealing device forms part of the bearing arrangement.

Alternatively or optionally in addition, the protective device has a functional geometry. Preferably, the at least one medium that has penetrated through the at least one access can be diverted again outside the sealing device and/or the bearing arrangement by means of the functional geometry or, if the former was not or only partially successful, can be introduced into the at least one collecting space.

For example, the functional geometry is arranged and/or formed on a peripheral side, in particular on the outer peripheral side, of the rotatable sealing ring. Alternatively, the functional geometry forms the peripheral side, in particular the outer peripheral side, of the rotatable sealing ring. Optionally, the functional geometry in the cross section of the rotatable sealing ring has a single or multiple z-shaped course and/or it can form a zigzag line. It is possible within the scope of the invention for the z-shaped course and/or the zigzag line to comprise different angles. Preferably, the functional geometry adjoins the at least one wall barrier in the axial direction. In particular, the functional geometry runs between the outer end face and the inner end face; in particular, the functional geometry preferably extends completely from the outer end face to the inner end face.

In a further possible constructive implementation of the invention, the functional geometry, together with the at least one wall section of the rotation-proof sealing ring, defines the smallest possible gap dimension of the at least one access to the at least one catcher space. For example, the functional geometry has a region radially opposite to the outer wall section, to the middle wall section and/or to the inner wall section, which is inclined to the axial direction and which approaches the respective wall section in the axial direction or in the opposite direction and thus reduces the gap dimension. This has the advantage that the smallest possible amount and/or the smallest possible volume of the at least one medium can penetrate into the outer collecting space through the external access and/or into the inner collecting space through the inner access. In addition, an exchange of the at least one medium between the two collecting spaces via the middle access can be avoided and/or reduced.

In a possible embodiment of the invention, the protective device comprises a sealing device. The sealing device preferably has at least one sealing lip. The sealing device is preferably designed to seal the outer collecting space from the inner collecting space, at least when the rotatable sealing ring is at a standstill. The sealing device is preferably arranged on the rotatable sealing ring and can rotate with it about the main axis. For example, the sealing device rests with a contact surface on the peripheral surface, in particular on the outer peripheral surface, of the rotatable sealing ring. Optionally, the contact surface is arranged corresponding to a section of the functional geometry of the rotatable sealing ring and rests against it.

A further possible embodiment of the invention provides that the at least one sealing lip rests on the central wall section of the rotation-proof sealing ring, for example on a short leg of the L of its L contour, when the rotatable sealing ring is at a standstill and can thus seal the two collecting spaces against one another. As a result, the first medium, e.g. the water and/or the water mixture, which penetrates through the external access, flows in the axial opposite direction and/or is located in the outer collecting space, can be largely or completely prevented from entering the medium via the central access to reach the inner collecting space. It is particularly advantageous that the sealing lip rests against the central wall section precisely when the idle machine or vehicle is being cleaned and the rotatable sealing ring is therefore at a standstill. In a corresponding manner, the second medium, in particular the lubricant, can advantageously be prevented from escaping through the central access into the outer collecting space by the sealing lip resting on the central wall section.

In a possible embodiment of the invention, the at least one sealing lip is spaced from the central wall section when the rotatable sealing ring rotates and / or when the machine and / or the vehicle in which the bearing arrangement is integrated with the rolling bearing device and with the sealing device, is in operation. In particular, the at least one sealing lip lifts off from the central wall section due to the centrifugal force acting during the rotation of the rotatable sealing ring. This has the advantage that friction between the central wall section and the at least one sealing lip during rotation can be reduced or even completely avoided. Wear caused by friction can be advantageously avoided.

A bearing arrangement with a rolling bearing device and with the sealing device according to the previous description and / or according to one of claims 1 to 13 forms a further subject of the invention. The rolling bearing device is preferably designed as a ball bearing or roller bearing. In particular, the rolling bearing device has a rotatable bearing ring, in particular an inner ring, and a rotationally fixed bearing ring, in particular an outer ring. The bearing rings are preferably arranged concentrically and/or coaxially to one another, to the main axis and/or to the sealing rings. Rolling bodies, e.g. balls or rollers, are preferably arranged between the bearing rings and can roll on the circumferential sides of the bearing rings during operation of the bearing arrangement.

The sealing device is arranged and/or designed to keep and carry away the first medium, in particular the water and/or the water mixture, from the rolling bearing device. Alternatively or additionally, the sealing device is designed to collect the second medium, in particular the lubricant, and return it to the rolling bearing device.

A possible embodiment of the invention provides that the sealing rings are pressed with the bearing rings or are connected in a form-fitting manner, for example by means of retaining rings. In particular, the rotatable sealing ring and the rotatable bearing ring can thereby rotate together about the main axis.

In a preferred embodiment of the invention, the second medium, in particular the lubricant, can be introduced and/or introduced into the rolling bearing device, for example on the transmission side. Preferably, the second medium is arranged in the rolling bearing device and has a filling level. Preferably the filling is level arranged radially below an upper edge of the inner wall section and / or radially below the inner drip nose. As a result, a quantity and/or a volume of the second medium can be retained on or in the rolling bearing device and/or fed back into it. In particular, the amount and/or the volume of the second medium that can penetrate into the internal collecting space through the internal access can be reduced.

• 1 ein Querschnitt einer Dichtungsvorrichtung mit einem äußeren Dichtungsring, einem inneren Dichtungsring und einer Dichteinrichtung;
• 2 ein Querschnitt einer Lageranordnung mit der Dichtungsvorrichtung aus der 1 und mit einer Wälzlagereinrichtung, wobei die Dichtungsringe mit Lagerringen der Wälzlagereinrichtung verpresst sind;
• 3 die Lageranordnung aus der 2, wobei die Dichtungsringe über O-Ringe an den Lagerringen befestigt sind.

Further features, advantages and effects of the invention result from the following description of preferred exemplary embodiments of the invention. Show:

• 1 a cross section of a sealing device with an outer sealing ring, an inner sealing ring and a sealing device;
• 2 a cross section of a bearing arrangement with the sealing device from the 1 and with a rolling bearing device, the sealing rings being pressed with bearing rings of the rolling bearing device;
• 3 the storage arrangement from the 2 , whereby the sealing rings are attached to the bearing rings via O-rings.

Corresponding or identical parts are provided with the same reference numerals in the figures.

In the 1 is a cross section of a sealing device 1 for a bearing arrangement 30 ( 2 and 3 ) shown. The bearing arrangement 30 includes a rolling bearing device 31 and can be integrated into a stationary or movable transmission of a machine or vehicle. The sealing device 1 forms a labyrinth seal, by means of which at least one medium, in particular a first medium 2a and a second medium 2b, can be collected and specifically diverted in order to maintain the functionality of the rolling bearing device 31.

The sealing device 1 has an outer sealing ring 4 and an inner sealing ring 5, which are arranged coaxially and/or concentrically to one another and to a main axis 6. The outer sealing ring 4 is rotation-proof, that is, it is stationary and cannot rotate. The inner sealing ring 5 is rotatable, that is, it can rotate radially within the outer sealing ring 4 about the main axis 6. A distance 3 is arranged between the two sealing rings 4, 5. The main axis 6 defines an axial direction 7.

The inner sealing ring 5 has an outer peripheral surface 8, an outer end face 9 directed in the axial direction 7 and an inner end face 10 directed in an axial opposite direction. The outer sealing ring 4 has an inner circumferential surface 11 which is spaced apart from the outer circumferential surface 8, an outer end face 12 directed in the axial direction 7 and an inner end face 13 directed in the axial opposite direction. The inner sealing ring 5 is axially wider than the outer sealing ring 4, the end faces 9, 10 of which protrude beyond the end faces 12, 13 of the outer sealing ring 4. The outer circumferential surface 8 of the inner sealing ring 5 is designed in multiple, in particular double, z-shapes and/or it describes a zigzag line with angles that sometimes differ in size. The inner peripheral surface 11 of the outer sealing ring 4 is designed in steps.

The outer, rotation-proof sealing ring 4 has three wall sections 14a, 14b, 14c, which are arranged spaced apart from one another in the axial direction 7. The wall sections 14a, 14b, 14c form the inner peripheral surface 11 of the outer sealing ring 4 in sections. They are of different heights. An inner wall section 14c and an outer wall section 14a have a 90 degree contour in cross section and/or are rectangular in cross section. A central wall section 14b is essentially L-shaped in cross section with a long leg and a short leg.

An inner collecting space 15b is partially delimited by the inner wall section 14c and the middle wall section 14b, which is fluidly accessible from outside the sealing device 1, in particular on the rolling bearing device side, due to the distance 3 between the two sealing rings 4, 5. An outer collecting space 15a is partially delimited by the outer wall section 14a and the middle wall section 14b, which is fluidly accessible from outside the sealing device 1, in particular away from the rolling bearing device 31, due to the distance 3 between the two sealing rings 4, 5. The two collecting spaces 15a, 15b are separated from one another by the middle wall section 14c.

The first medium 2a can be collected in the outer collecting space 15a. The first medium 2a is water and/or a water mixture which, for example, can come into contact with the sealing device 1 during a cleaning process of the machine or vehicle and can at least partially penetrate into it. The second medium 2b is a lubricant, for example oil or grease, which is supplied by the roller bearing device device 31 comes and can at least partially penetrate into the sealing device 1.

An outer channel 16a runs through the outer wall section 14a and an inner channel 16b runs through the inner wall section 14c. The outer channel 16a is assigned to the outer collecting space 15a, whereby it fluidly connects it to an external environment of the sealing device 1, the external environment facing away from the rolling bearing device 31. The inner channel 16b is assigned to the inner collecting space 15b, whereby it fluidly connects it to the external environment of the sealing device 1, in which the rolling bearing device 31 according to 2 and 3 is arranged.

The rotationally fixed outer sealing ring 4 is aligned and/or positioned such that the channels 16a, 16b are arranged at a 6 o'clock position. As a result, the first medium 2a collected in the outer collecting space 15a can flow out of the sealing device 1 through the outer channel 16a and the second medium 2b collected in the inner collecting space 15b can flow out of the sealing device 1 through the inner channel 16b.

The aim of the design of the sealing device 1 is that the largest possible amount and/or the largest possible volume of the media 2a, 2b is prevented from penetrating into the collecting spaces 15a, 15b. For this reason, the inner sealing ring 5 has a protective device 17. The protective device 17 includes an outer wall barrier 18a, which includes the outer end face 9 of the inner sealing ring 5, and an inner wall barrier 18b, which includes the inner end face 10 of the inner sealing ring 5. The outer wall barrier 18a has an outer drip nose 19a and the inner wall barrier 18b has an inner drip nose 19b, from which the respective medium 2a, 2b can drip outside the sealing device 1 when it hits the corresponding end face 9, 10. Dripping outside the sealing device 1 is ensured by the fact that the inner sealing ring 5 is axially wider than the outer sealing ring 4. The rotation of the inner sealing ring 5 further supports the fact that the respective medium 2a, 2b is supported by the drip nose 19a, 19b can be thrown away.

The protective device 17 also includes a functional geometry 20. The functional geometry 20 includes and/or forms the outer peripheral surface 8 of the inner sealing ring 5 and extends from its outer end face 9 to its inner end face 10. The functional geometry 20 has a double z-shaped cross section Course and/or it forms the zigzag line with the angles, some of which are of different sizes.

The functional geometry 20 has an outer region 25a and an inner region 25c. The outer region 25a runs obliquely to the outer drip nose 19a and the inner region 25c runs obliquely to the inner drip nose 19b. In the axial direction 7, the outer region 25a approaches an upper edge of the outer wall section 14a and in the axial opposite direction, the inner region 25c approaches an upper edge of the inner wall section 14b. This reduces a gap size of an outer gap 21a between the outer region 25a and the outer wall portion 14a in the axial direction 7. The gap size of an inner gap 21c between the inner region 25c and the inner wall section 14b in the opposite direction is thereby also reduced. This allows the amount and/or volume of the respective medium 2a, 2b that can penetrate through the corresponding gap 21a, 21c to be reduced. Furthermore, the oblique course of the areas 25a, 25c supports a flow back to the respective drip nose 19a, 19b of at least part of the respective medium 2a, 2b, which has penetrated into the corresponding gap 21a, 21c despite the small gap size.

Following the outer region 25a, a further outer region 25b is provided at an angle in the axial opposite direction, for example at an angle between 85 degrees and 120 degrees. A first central region 25e adjoins this at an angle a between 250 degrees and 280 degrees. Following the inner region 25c, a further inner region 25d which is essentially perpendicular to the main axis 6 is provided at an angle in the axial direction 7, for example at an angle β between 250 degrees and 280 degrees. This is followed by a second inner region 25f, which is essentially aligned in the same direction as the main axis 6 and which in turn adjoins the first inner region 25e in the axial direction 7.

The part of the first medium 2a that has penetrated through the outer gap 21a and has not flowed back to the outer inclined region 25a can be introduced into the outer collecting space 15a by means of the further outer region 25b. This can be done in particular by the first medium 2a dripping off at the angle a and/or being thrown from the angle a into the outer collecting space 15a by the rotation of the inner sealing ring 5. The part of the second medium 2b that has penetrated through the inner gap 21c and has not flowed back to the inner inclined area 25c can be introduced into the inner collecting space 15b by means of the further inner area 25d. this happens in particular because the second medium 2b drips off at the angle β and/or is thrown in by the rotation of the inner sealing ring 5. The respective medium 2a, 2b can flow outwards again from the collecting spaces 15a, 15b through the channels 16a, 16b.

The slanted first inner region 25e is arranged opposite an upper edge of the middle wall portion 14b. The upper edge and the inner region 25e are aligned essentially in the same direction and/or parallel and are arranged as close to one another as possible, so that a gap dimension of a middle gap 21b between the two is kept as small as possible. This allows the amount and/or volume of the media 2a, 2b that can flow through the central gap 21b to be reduced.

The sealing device 1 has a sealing device 22. The sealing device 22 is arranged and/or designed to avoid an alternating flow of the media 2a, 2b between the collecting spaces 15a, 15b. The sealing device 22 is designed as a sealing ring with a sealing lip 23. The sealing device 22 has an outer contour with which it rests in a form-fitting manner on the outer peripheral surface 8 in sections. For this purpose, a contact surface 24 of the sealing device 22 is designed to correspond to a section of the functional geometry 20. With the contact surface 24, which is essentially rectangular in cross section, the sealing device 22 rests on the further inner region 25d and on the second central region 25f.

When the inner sealing ring 5 is stationary and does not rotate, the sealing lip 23 is axially aligned and rests on the central wall section 14b and here in particular on the short leg of the L of the L contour. An angle at which the short leg is aligned with the long leg of the L and the orientation of the sealing lip 23 are coordinated with one another. By abutting the sealing lip 23 on the short leg of the L, the second medium 2b flowing into and/or located in the inner collecting space 15b can be prevented from escaping through the middle gap 21b into the outer collecting space 15a. Penetration of the first medium 2a flowing into and/or located in the outer collecting space 15a through the central gap 21b into the inner collecting space 15b can also be avoided.

During operation, especially when the inner sealing ring 5 rotates, the sealing lip 23 lifts off the short leg of the L due to the centrifugal force acting. This can reduce or even prevent friction and the resulting wear between the two. Despite the lifting of the sealing lip 23 when the inner sealing ring 5 rotates, it forms an obstacle for the second medium 2b located in the inner collecting space 15b or flowing into it. When the sealing ring 5 rotates, the obstacle is essentially aligned in the same direction and/or parallel to the short leg of the L and thus largely shields the central gap 21b from the inner collecting space 15b against penetration of the second medium 2b.

In the 2 and 3 a cross section of the bearing arrangement 30 with the sealing device 1 and with the rolling bearing device 31 is shown. The bearing arrangement 30 can be integrated into the transmission of the machine or vehicle. This is, for example, a wet-running transmission, the components of which are lubricated with the second medium 2b in training as the lubricant.

The rolling bearing device 31 is arranged in the axial opposite direction adjacent to the sealing device 1, in particular adjacent to the inner end faces 10, 13. It comprises a rotationally fixed outer ring 32 and a rotatable inner ring 33, which are arranged coaxially and/or concentrically to the main axis 6 and to one another. A rolling space 34 is arranged between the outer ring 32 and the inner ring 33, in which rolling bodies 35, e.g. balls or rollers, can roll on opposite peripheral sides of the outer ring 32 and the inner ring 33.

The outer ring 32 adjoins the outer sealing ring 4 in the opposite axial direction. The inner ring 33 adjoins the inner sealing ring 5 in the opposite axial direction. According to the 2 the outer ring 32 is pressed with the outer sealing ring 4 and the inner ring 33 with the inner sealing ring 5. According to the 3 the outer ring 32 is connected to the outer sealing ring 4 and the inner ring 33 to the inner sealing ring 5 in a form-fitting manner via two O-rings 36a, 36b. Due to the mutual pressing or the positive connection, the inner ring 33 and the inner sealing ring 5 rotate with each other about the main axis 6.

The rolling bearing device 31 is supplied with second medium 2b for lubrication during the rotation of the inner ring 33 and the rolling of the rolling elements 35. The rolling bearing device 31, in particular the rolling space 34, is fluidly connected to the inner collecting space 15b via the inner gap 21c. This makes it possible for the second medium 2b to emerge from the rolling bearing device 31 and reach the sealing device 1. In order to reduce the amount and/or volume of the second medium 2b emerging from the rolling bearing device 31, the rolling bearing is in place Direction 31 positioned and / or designed so that a fill level 37 of the second medium 2b is arranged below the upper edge of the inner wall section 14c and / or below the inner drip nose 19b, at least when the bearing arrangement 30 is at a standstill.

As already in the 1 described, a part of the second medium 2b can hit the inner wall barrier 18b from the rolling bearing device 31 and drip from the inner drip nose 19b outside the inner collecting space 15b, so that it is immediately fed back to the rolling bearing device 31. Another part of the second medium 2b can penetrate from the rolling bearing device 31 through the inner gap 21c. The second medium 2b can be partially attached to the inner area 25c. Functional geometry 20 ( 1 ) are returned to the rolling bearing device 31. However, it can also flow in at least partially via the inner region 25c and drip into the inner collecting space 15b at the angle β. From the inner collecting space 15b, the second medium 2b is returned through the inner channel 16b directly to supply the rolling bearing device 31.

An undesirable escape of the second medium 2b from the inner collecting space 15b via the central channel 21b into the outer collecting space 15a can be largely or completely avoided by the sealing device 22, the functional geometry 20 and/or the small gap size of the central gap 21b. Thus, in a first function, the sealing device 1 can ensure and/or ensure sufficient lubrication of the rolling bearing device 31 with the second medium 2b as the lubricant for error-free operation. The arrangement and/or design of the sealing device 1 also enables the lubricant to be used in the rolling bearing device 31 to be changed, for example from oil to grease or vice versa.

In a second function of the sealing device 1, it protects the rolling bearing device 31 against penetration of the first medium 2a. Like in the 1 described, can be done using the protective device 17 ( 1 ) and the sealing device 22, in particular when the bearing arrangement 30 is not in operation and/or when the machine or the vehicle is being cleaned, the water or water mixture used for cleaning as the second medium 2b is prevented from reaching the rolling bearing device 31 and this to impair their function.

Reference symbol list

1

Sealing device

2a

first medium

2 B

second medium

3

Distance

4

outer sealing ring

5

inner sealing ring

6

main axis

7

axial direction

8th

Outer circumferential surface of inner sealing ring

9

outer face inner sealing ring

10

Inner face inner sealing ring

11

Inner circumferential surface of outer sealing ring

12

outer face outer sealing ring

13

Inner face outer sealing ring

14a

outer wall section

14b

middle wall section

14c

inner wall section

15a

external collecting space

15b

inner collecting space

16a

outer channel

16b

inner channel

17

Protective device

18a

external wall barrier

18b

inner wall barrier

19a

external drip nose

19b

internal drip nose

20

Functional geometry

21a

external gap

21b

middle gap

21c

inner gap

22

Sealing device

23

sealing lip

24

investment area

25a

outer area

25b

further external area

25c

inner area

25d

further inner area

25e

first middle area

25f

second middle area

30

Storage arrangement

31

Rolling bearing device

32

Outer ring

33

Inner ring

34

rolling space

35

rolling elements

36a

first O-ring

36b

second O-ring

37

Fill level

QUOTES INCLUDED IN THE DESCRIPTION

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Cited patent literature

• DE 112016002479 T5 [0003]

Claims (15)

Sealing device (1) for a bearing arrangement (30), with an outer sealing ring (4) and with an inner sealing ring (5), the sealing rings (4, 5) defining a main axis (6), the sealing rings (4, 5) are arranged coaxially with respect to the main axis (6) and a radial distance (3) is arranged between the sealing rings (4, 5), one of the sealing rings (4, 5) being rotationally fixed and the other sealing ring (4, 5 ) can be rotated about the main axis (6), characterized in that one of the sealing rings (4, 5) delimits at least one collecting space (15a, 15b) for collecting at least one medium (2a, 2b) in sections. Sealing device (1). Claim 1 , characterized in that the rotation-proof sealing ring (4) has a plurality of wall sections (14a, 14b, 14c), the wall sections (14a, 14b, 14c) delimiting the at least one collecting space (15a, 15b) in sections, the wall sections (14a, 14b, 14c) form a peripheral side (11) of the rotation-proof sealing ring (4) in sections. Sealing device (1). Claim 1 or 2 , characterized in that the rotation-proof sealing ring (4) has at least one channel (16a, 16b) for discharging the at least one medium (2a, 2b) from the at least one collecting space (15a, 15b), the at least one channel (16a, 16b) runs through at least one of the wall sections (14a, 14c). Sealing device (1) according to one of the preceding claims, characterized in that at least one access designed as a gap (21a, 21b, 21c) to the at least one collecting space (15a, 15b) is formed by the radial distance (3), the rotatable sealing ring (4) has a protective device (17), the protective device (17) protecting against penetration of the at least one medium (2a, 2b) through the at least one gap (21a, 21b, 21c) into the at least one collecting space (15a, 15b) is formed. Sealing device (1). Claim 4 , characterized in that the protective device (17) comprises at least one wall barrier (18a, 18b), wherein the at least one wall barrier (18a, 18b) is arranged on at least one axial end face (9, 10) of the rotatable sealing ring (5), wherein the at least one wall barrier (18a, 18b) has a drip nose (19a, 19b), from which the at least one medium (2a, 2b) striking the wall barrier (18a, 18b) can drip outside the at least one collecting space (15a, 15b). . Sealing device (1). Claim 4 or 5 , characterized in that the protective device (17) comprises a functional geometry (20), the functional geometry (20) for returning the penetrating medium (2a, 2b) to the outside of the sealing device (1) and / or for introducing the through the at least one Gap (21a, 21b, 21c) of penetrated medium (2a, 2b) is formed in the at least one collecting space (15a, 15b). Sealing device (1). Claim 6 , characterized in that the functional geometry (20) is arranged and/or formed on a peripheral side (8) of the rotatable sealing ring 5), the functional geometry (20) having a single or multiple z-shaped course in the cross section of the rotatable sealing ring (5). and/or forms a zigzag line, wherein the functional geometry (20), together with the at least one wall section (14a, 14b, 14c) of the rotation-proof sealing ring (4), defines the smallest possible gap dimension of the at least one gap (21a, 21b, 21c). Sealing device (1) according to one of the preceding claims, characterized in that the rotation-proof sealing ring (4) has an outer collecting space (15a) for collecting a first medium (2a), in particular water and / or a water mixture, and an inner collecting space (15b ) for collecting a second medium (2b), in particular a lubricant, limited in sections. Sealing device (1) according to claim one of the Claims 6 until 8th , characterized in that the protective device (17) comprises a sealing device (22) with at least one sealing lip (23), the sealing device (22) protecting the outer collecting space (15a) against the inner collecting space (15b) at least when the rotatable sealing ring is at a standstill (5) seals, the sealing device (22) resting with a contact surface (24) on the peripheral surface (8) of the rotatable sealing ring (5), the contact surface (24) being designed to correspond to a section of the functional geometry (20). Sealing device (1). Claim 8 or 9 , characterized in that the rotation-proof sealing ring (4) has an outer wall section (14a), a middle wall section (14b) and an inner wall section (14c), the outer wall section (14a) and the middle wall section (15b) forming the outer collecting space (15a) in sections and wherein the inner wall section (14c) and the middle wall section (14b) delimit the inner collecting space (15b) in sections, with at least one outer channel (16a) running through the outer wall section (14a) and through the inner Wall section (14c) has at least one inner channel (16b). Sealing device (1). Claim 10 , characterized in that the at least one sealing lip (23) rests against the central wall section (14b) of the rotation-proof sealing ring (4) when the rotatable sealing ring (5) is at a standstill and / or wherein the at least one sealing lip (23) during the rotation of the rotatable sealing ring (5) is spaced from the central wall section (14b) to reduce friction. Sealing device (1) according to one of the Claims 9 until 11 , characterized in that the protective device (17) has an outer wall barrier (18a) with an outer drip nose (19a) and an inner wall barrier (18b) with an inner drip nose (19b), the first one hitting the outer wall barrier (18a). Medium (2a) can drip outside the outer collecting space (15a) from the outer drip nose (19a) and the second medium (2b) hitting the inner wall barrier (18b) outside the inner collecting space (15b) from the inner drip nose (19b) can drain. Sealing device (1) according to one of the Claims 9 until 12 , characterized in that the functional geometry (20) together with the outer wall section (14a) defines the smallest possible gap dimension of an outer gap (21a) from outside the sealing device (1) to the outer collecting space (15a) and / or that the functional geometry ( 20) together with the middle wall section (14b) defines the smallest possible gap dimension of a middle gap (21b) between the outer collecting space (15a) and the inner collecting space (15b) and / or wherein the functional geometry (20) together with the inner wall section ( 14c) defines the smallest possible gap dimension of an inner gap (21c) from outside the sealing device (1) to the inner collecting space (15b). Bearing arrangement (30) with a rolling bearing device (31) and with the sealing device (1) according to one of the preceding claims, wherein the sealing device (1) for keeping and guiding away the first medium (2a) from the rolling bearing device (31) and / or for collecting and returning the second medium (2b) to the rolling bearing device (31) is arranged and/or designed. Bearing arrangement (30). Claim 14 , characterized in that the outer wall section (14a) and / or the outer wall barrier (18a) is arranged facing away from the rolling bearing device (31) and that the inner wall section (14c) and / or the inner wall barrier (18b) faces the rolling bearing device ( 31) are arranged facing, wherein the outer channel (16a) is arranged to guide away the first medium (2a) collected in the outer collecting space (15a) from the rolling bearing device (31) and / or wherein the inner channel (16b) is arranged to guide the second medium (2b) collected in the inner collecting space (15b) is arranged to the rolling bearing device (31), the second medium (2b) being arranged in the rolling bearing device (31) and having a fill level, the fill level being below an upper edge of the inner Wall section (14c) and / or below the inner drip nose (19b) is arranged.

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