Bearing with detachable seal module

Abstract

The bearing comprises a first ring (10) and a second ring (12) able to rotate concentrically relative to each other, and at least one seal provided with at least one sealing lip. The bearing also comprises a sealing module (32) comprising a carrier (50) reversibly fixed to the first ring (10), the seal being mounted in contact with the carrier in the radial direction, a friction ring (58) reversibly fixed to the second ring (12), the sealing lip of the seal being in contact with the friction ring, and at least one spacing element (70) interposed axially between the friction ring (58) and the second ring (12).

Description

Technical Field

[0001] This invention relates to the field of bearings.

[0002] The present invention relates particularly to the field of large-diameter bearings having an inner ring and an outer ring concentrically arranged about a rotation axis extending in the axial direction. Background Technology

[0003] These large-diameter bearings can be used in applications such as marine applications (e.g., tidal or marine turbine power plants), tunnel boring machines, mining extraction machines, or wind turbines.

[0004] Large-diameter bearings typically consist of two concentric inner and outer rings and at least one row of rolling elements (such as rollers or balls) arranged between the rings. The bearing also includes a seal disposed between the inner and outer rings to define a closed space containing the rolling elements.

[0005] Large-diameter rolling bearings are typically used in aggressive environments, particularly in marine applications. Seals prevent external elements (such as dust, abrasive particles, water, and marine species (e.g., plankton and algae)) from entering the bearing and damaging its components. These external elements can also cause the seals themselves to age, leading to a shorter service life.

[0006] Typically, the seal is fixed to one of the inner and outer rings and includes a sealing lip that slides in contact with the running surface of the other ring. Often, multiple adjacent seals are arranged on the front side of the bearing that is in direct contact with a corrosive environment (e.g., salt water). See, for example, patent application DE102018213357 (SKF).

[0007] After months or years of use, the seals cause wear on the running surfaces. The inner or outer ring of the rolling bearing, including these running surfaces, must be replaced. This increases the maintenance cost of the rolling bearing.

[0008] In fact, the rings of rolling bearings used, such as those in slewing bearings or tunnel boring machine bearings, are quite expensive because the materials used for those rings must be corrosion-resistant and wear-resistant.

[0009] Otherwise, maintenance is expensive and requires prolonged downtime (or shutdown) of the associated machines. Summary of the Invention

[0010] One object of the present invention is to overcome these disadvantages.

[0011] The present invention relates to a bearing comprising: a first ring and a second ring, rotatable concentrically relative to each other; and at least one seal having at least one sealing lip.

[0012] According to the first general feature, the bearing further includes a sealing module comprising: a carrier reversibly fixed to a first ring; and a friction ring reversibly fixed to a second ring. The seal is mounted to contact the carrier in the radial direction. The sealing lip of the seal contacts the friction ring.

[0013] The sealing module further includes at least one spacer element, which is axially positioned between the friction ring and the second ring.

[0014] The sealing device forms a cartridge seal, which can be easily and completely removed during maintenance operations without disassembling the bearing race. Unlike existing solutions where one or more seals are mounted on one of the bearing races, this allows for easy removal and replacement during maintenance. This facilitates maintenance of the seal(s) and helps reduce downtime required for seal(s).

[0015] Furthermore, during maintenance operations, the spacer element can be removed without replacing it, allowing each seal to have a new running surface on the friction ring. In effect, with the removal of the spacer element, the friction ring shifts axially relative to (one or more) the seals. The friction area of ​​(one or more) the seals on the friction ring also shifts axially. This increases the service life of the friction ring.

[0016] An axial gap may be provided between the friction ring and the second ring of the sealing module. The size of the axial gap is equal to or greater than the axial thickness of the spacer element of the sealing module.

[0017] The seal of the sealing module may include an annular heel mounted to contact a carrier in the radial direction, and the sealing lip contacts a friction ring. The sealing lip may protrude from the heel.

[0018] The bearing may also include at least one row of rolling elements, which are arranged between the first raceway of the first revolution and the second raceway of the second revolution.

[0019] Advantageously, the first ring may include: at least one rolling ring provided with the first raceway; and a first sealing ring fixed to the first rolling ring. In this case, the carrier of the sealing module is reversibly fixed to the first sealing ring axially on the side opposite to the first rolling ring.

[0020] Using this first sealing ring, the first rolling ring can be a conventional ring without specific machining operations.

[0021] Advantageously, the second ring may include: at least one second rolling ring provided with the second raceway; and a second sealing ring fixed to the second rolling ring. In this case, the friction ring of the sealing module is reversibly fixed to the second sealing ring axially on the side opposite to the second rolling ring.

[0022] Using this second sealing ring, the second rolling ring can be a conventional ring without specific machining operations.

[0023] The spacer element of the sealing module can be axially positioned between the friction ring and the second sealing ring of the second ring.

[0024] In an advantageous embodiment, the bearing further includes at least one sealing element, which is radially disposed between the first and second sealing rings and axially positioned between the sealing module and the first and second rolling rings. During maintenance operations involving complete removal of the sealing device, the sealing element is capable of limiting intrusion of external elements toward the first and second rolling rings.

[0025] The sealing module may also include multiple retaining screws that extend through the friction ring and the spacer element and engage inside threaded holes in the second ring. These threaded holes may be located on the second sealing ring of the second ring.

[0026] The friction ring of the sealing module may have an axial portion and a radial portion, the sealing lip of the seal contacts the axial portion, and the spacer element is located axially between the radial portion and the second ring.

[0027] The carrier of the sealing module may be provided with an axial portion and a radial portion, wherein the sealing element contacts the axial portion in the radial direction and the radial portion extends toward the friction ring.

[0028] In one embodiment, the carrier of the sealing module is mounted in an annular groove of the first sealing ring. The groove may be formed on the first ring of the first sealing ring. Attached Figure Description

[0029] The invention and its advantages will be better understood by studying the detailed description of the specific embodiments given by way of non-limiting examples and illustrated in the accompanying drawings, in which:

[0030] Figure 1 This is a partial cross-section of the rolling bearing in the first position according to an example of the present invention.

[0031] Figure 2 yes Figure 1 Detailed view,

[0032] Figures 3 to 7 It is shown Figure 1 The cross-section of the disassembly and reassembly of the sealing module of the rolling bearing, and

[0033] Figure 8 yes Figure 1 The rolling bearing is located in a partial section in the second position. Detailed Implementation

[0034] like Figure 1 The rolling bearing shown is a large-diameter rolling bearing comprising a first ring 10 and a second ring 12. In the example shown, the first ring 10 is the outer ring, and the second ring 12 is the inner ring. In this example, the inner ring 12 is the rotating ring, and the outer ring 10 is the non-rotating ring. Rolling bearings can be used, for example, in tunnel boring machines, wind turbines, or any other application that uses large-diameter rolling bearings.

[0035] Outer ring 10 and inner ring 12 are concentric and extend axially along the bearing rotation axis (not shown), which extends in the axial direction. Rings 10 and 12 are solid.

[0036] The outer ring 10 includes a rolling ring 14 and a sealing ring 16 fixed to the rolling ring 14. The inner ring 12 also includes a rolling ring 18 and a sealing ring 20 fixed to the rolling ring 18. The sealing ring 16 of the outer ring radially surrounds the sealing ring 20 of the inner ring.

[0037] The outer rolling ring 14 is formed as a split ring and includes a first ring 22 and a second ring 24 stacked opposite each other in the axial direction. Each of the first ring 22 and the second ring 24 of the rolling ring is provided with a plurality of alignment through holes (not marked) for engagement by screws (not shown).

[0038] In the example shown, the rolling bearing further includes two rows of axial rollers 26, 28, arranged between the outer rolling ring 14 and the inner rolling ring 18 to generate axial thrust. The rolling bearing also includes a row of radial rollers 30 arranged between the rolling rings 14, 18 to generate radial thrust.

[0039] As will be described later, the rolling bearing also includes a sealing module 32, which is removably / reversibly attached to the sealing ring 20 of the inner ring and the sealing ring 16 of the outer ring.

[0040] Rollers 26, 28, and 30 in a row are identical to each other. Each roller 26, 28, and 30 includes a cylindrical outer rolling surface. The axis of rotation of each roller 30 is parallel to the axis of the bearing and perpendicular to the axis of each of rollers 26 and 28.

[0041] Roller 26 is axially disposed between an annular radial raceway 34 formed on rolling ring 18 and an annular radial raceway 36 formed on rolling ring 14. Raceways 34 and 36 face each other in the axial direction.

[0042] Rollers 28 are axially disposed between annular radial raceways 38 formed on rolling ring 18 and annular radial raceways 40 formed on rolling ring 14. Raceways 38 and 40 face each other axially. Rows of rollers 26 and rows of rollers 28 are spaced apart from each other in the axial direction.

[0043] Rollers 30 are radially disposed between annular axial raceways 42 formed on rolling ring 18 and annular axial raceways 44 formed on rolling ring 14. Raceways 42 and 44 face each other in the radial direction. The rows of rollers 30 are radially offset (or staggered) relative to the rows of rollers 26 and 28. The rows of rollers 30 are axially positioned between the rows of rollers 26 and 28.

[0044] The outer rolling ring 14 includes an annular groove 46 that opens radially inward toward the inner rolling ring 18. The rolling ring 18 includes an annular nose 48 that engages in the annular groove 46. The nose 48 extends radially outward. The nose 48 protrudes radially from the cylindrical outer surface of the rolling ring 18.

[0045] Rows of rollers 26 and 28 are axially arranged between the nose 48 and the groove 46. Rows of rollers 26 and 28 are arranged on both sides of the nose 48. Radial raceways 34 and 38 are positioned on the nose 48. Radial raceways 36 and 40 are positioned on the groove 46.

[0046] Rows of rollers 30 are radially arranged between a nose 48 and a groove 46. An axial raceway 42 is positioned on the nose 48, and an axial raceway 44 is positioned on the groove 46. The cylindrical outer surface of the nose 48 defines the axial raceway 42. The axial bottom of the groove 46 defines the axial raceway 44.

[0047] In the example shown, the inner rolling ring 18 is made in one part. Alternatively, the rolling ring 18 may be divided into at least two separate parts fixed together in the axial direction. In another variation, the nose 48 may be made separately from the main part of the inner ring.

[0048] As mentioned earlier, the outer rolling ring 14 is divided into two separate parts in the axial direction: a first ring 22 and a second ring 24. The first ring 22 and the second ring 24 together define the groove 46.

[0049] The outer ring raceways 36, 40, and 44 are located on the rolling ring 14. The inner ring raceways 34, 38, and 42 are located on the rolling ring 18. The sealing rings 16 and 20 have no raceways.

[0050] The outer sealing ring 16 is mounted axially to contact the radial front face of the rolling ring 14. The sealing ring 16 protrudes axially relative to the rolling ring 14. The sealing ring 16 is secured to the rolling ring 14 using screws for engaging the first ring 22 and the second ring 24 of the rolling ring.

[0051] The inner sealing ring 20 is also secured to the rolling ring 18 using screws (not shown). The sealing ring 20 is axially mounted to contact the radial front of the rolling ring 18. The sealing ring 20 protrudes axially relative to the rolling ring 18. As previously mentioned, a sealing ring 16 surrounds the sealing ring 20 radially. A radial clearance (not marked) is provided between the sealing ring 16 and the sealing ring 20.

[0052] Each of the sealing rings 16 and 20 may be annular or segmented in the circumferential direction. Each of the sealing rings 16 and 20 may be made of stainless steel or treated steel that has been painted or treated for corrosion resistance.

[0053] like Figure 2 As shown more clearly in the diagram, the sealing module 32 includes: a carrier 50, a sealing ring 16 that is removably or reversibly attached to or secured to the outer ring; a plurality of seals 52, 54, 56 that are radially mounted to contact the carrier; and a friction ring 58 that is removably or reversibly secured to the sealing ring 20 of the inner ring. The carrier 50 surrounds the friction ring 58 radially.

[0054] As the bearing axis extends vertically... Figure 2 In the orientation of the rolling bearing shown, the carrier 50 supports the seals 52 to 56. The carrier 50 and the friction ring 58 together define an annular radial space 59, in which the seals 52 to 56 are arranged.

[0055] The carrier 50 is mounted into an annular groove 16a, which is formed in the bore of the sealing ring 16. The groove 16a is centered on the bearing's axis of rotation. The diameter of the bore of the sealing ring 16 is smaller than the diameter of the groove 16a. The groove 16a opens on a radial side 16b of the sealing ring, which is axially opposite to the rolling ring 14. The groove 16a is axially defined by a radial shoulder 16c, which connects to the bore of the sealing ring 16.

[0056] The carrier 50 is installed into the groove 16a of the sealing ring. The carrier 50 contacts the groove 16a radially. The carrier 50 abuts against the radial shoulder 16c of the groove axially. The carrier 50 does not protrude axially outward relative to the lateral face 16b of the sealing ring. In the example shown, the carrier 50 is flush with the lateral face 16b.

[0057] The bearing 50 is axially aligned with the rolling ring 14 ( Figure 1 The opposite side is fixed to the sealing ring 16. In the example shown, the sealing module 32 includes a plurality of screws 60 for reversibly securing the carrier 50 to the sealing ring 16. The screws 60 extend axially through the carrier 50 and engage inside threaded holes (not marked) in the outer ring of the sealing ring 16. The screws 60 are spaced apart in the circumferential direction.

[0058] The carrier 50 includes an annular axial portion 50a and an annular radial portion 50b extending radially inward. The radial portion 50b causes the first free end of the axial portion 50a to extend radially toward the friction ring 58. The radial portion 50b is axially positioned on the exterior side of the rolling bearing.

[0059] The axial portion 50a of the carrier member contacts the groove 16a of the sealing ring 16 in the radial direction. The axial portion 50a of the carrier member also abuts against the radial shoulder 16c of the groove of the sealing ring in the axial direction. More precisely, the second free end of the axial portion 50a, which is axially opposite to the first end, abuts against the radial shoulder 16c in the axial direction. The screw 60 extends axially through the axial portion 50a of the carrier member.

[0060] Friction ring 58 is axially fixed to the inner ring sealing ring 20 on the side opposite to the rolling ring 18. Friction ring 58 is mounted on the outer surface 20a of the sealing ring. Friction ring 58 contacts the outer surface 20a radially. In the illustrated example, the outer surface 20a of the sealing ring has a stepped shape to facilitate the installation of friction ring 58. Friction ring 58 does not protrude axially outward relative to the side surface 16b of the outer ring sealing ring. In the illustrated example, friction ring 58 is flush with side surface 16b.

[0061] The friction ring 58 includes an annular axial portion 58a and an annular radial portion 58b extending radially inward. The axial portion 58a is mounted on the outer surface 20a of the sealing ring. The bore of the axial portion 58a contacts the outer surface 20a of the sealing ring radially. The radial portion 58b allows the free end of the axial portion 58a to extend radially. The radial portion 58b is axially positioned on the outside of the rolling bearing.

[0062] As will be described later, an axial clearance 66 is provided between the friction ring 58 and the inner sealing ring 20. The axial clearance 66 is provided between the axial portion 58a of the friction ring and the sealing ring 20.

[0063] As mentioned above, each seal 52, 54, 56 is supported by a carrier 50. Each seal 52 to 56 is installed into a hole 62 in the axial portion 50a of the carrier 50. Seal 52 is axially positioned on the outside of the rolling bearing, seal 56 is axially positioned on one side of the sealing ring 16, and seal 54 is axially arranged between the two seals.

[0064] Each seal 52, 54, 56 is provided with an annular heel 52a, 54a, 56a and an annular friction lip 52b, 54b, 56b projecting from the heel. In the illustrated example, each friction lip 52b to 56b extends inward from the heel 52a to 56a. Here, each friction lip 52b to 56b extends obliquely. In the illustrated example, lips 52b and 54b extend obliquely outward, while lip 56b extends obliquely inward. In the illustrated example, lips 52b and 54b prevent external contaminants from entering the rolling bearing interior, and lip 56b prevents lubricant leakage.

[0065] The heels 52a, 54a, and 56a of each seal are mounted to radially contact the bore 62 of the axial portion 50a of the carrier 50. The heel 52a contacts the radial portion 50b of the carrier in the axial direction. The heel 56a contacts the radial shoulder 16c of the groove of the sealing ring in the axial direction.

[0066] Each seal's lip 52b, 54b, 56b is in frictional contact with the friction ring 58. The contact between each lip 52b, 54b, 56b and the friction ring 58 is radial. Lips 52b, 54b, 56b are flexible in the radial direction. Preferably, the free end of each lip has a triangular cross-section to reduce friction.

[0067] The lips 52b, 54b, and 56b of each seal are in frictional contact with the axial portion 58a of the friction ring. In the illustrated example, the lips 52b, 54b, and 56b are in frictional contact with the outer surface of the axial portion 58a of the friction ring. In the illustrated example, seals 52 to 56 are identical to each other. Alternatively, seals 52 to 56 may be different from each other. In the illustrated example, sealing device 32 includes three seals 52 to 56. The number of seals may vary. For example, sealing device 32 may include at least two seals. Seals 52 to 56 may be made of an elastomeric material (e.g., polyurethane).

[0068] The rolling bearing also includes at least one additional seal (not shown) disposed between the inner rolling ring 18 and the outer rolling ring 14 to define a closed space together with the seal 56, in which rows of rollers 26 to 30 and lubricant are located.

[0069] The sealing module 32 also includes spacers or shims 66, 68, positioned within a radial space 59 defined between the carrier 50 and the friction ring 58. The shims 66, 68 are supported by the carrier 50. The carrier 50 supports the seals 52, 54, 56 and the shims 66, 68. Each shim 66, 68 is axially positioned between two consecutive seals. The shims 66, 68 are radially spaced from the friction ring 58. The shims 66, 68 may be annular. Each shim 66, 68 is axially positioned between the heels 52a, 54a and between the heels 54a, 56a of the two consecutive seals. Each shim 66, 68 is installed in a hole 62 in the axial portion 50a of the carrier 50.

[0070] The sealing module 32 also includes a spacer 70, which is axially positioned between the friction ring 58 and the inner sealing ring 20. The friction ring 58 is axially spaced from the sealing ring 20 by the spacer 70. The spacer 70 is axially positioned between the friction ring 58 and the frontal surface of the sealing ring 20, the frontal surface of which is axially positioned relative to the rolling ring 18. Figure 1 On the opposite side. The spacer 70 is axially positioned between the radial portion 58b of the friction ring and the sealing ring 20. The spacer 70 may be annular or segmented in the circumferential direction. For example, the spacer 70 may be made of metal (such as steel) or plastic material.

[0071] As mentioned earlier, the friction ring 58 is removably / reversibly secured to the sealing ring 20. For this purpose, in the example shown, the sealing module 32 includes a plurality of screws 72. The screws 72 extend axially through the friction ring 58 and the spacer 70, and engage within threaded holes (not marked) in the inner sealing ring 20. The screws 72 extend axially through the radial portion 58b of the friction ring. The screws 72 are spaced apart in the circumferential direction.

[0072] The rolling bearing also includes a sealing element 74, which is radially disposed between the sealing ring 16 of the outer ring and the sealing ring 20 of the inner ring. The sealing element 74 is axially positioned between the sealing module 32 and the first rolling ring 14 and the second rolling ring 18. During maintenance operations, the sealing element 74 restricts intrusion of external components toward the rows of rollers 26, 28, 30. The sealing element 74 closes the radial clearance between the sealing rings 16 and 20.

[0073] In the example shown, the sealing element 74 is fitted into an annular groove (not shown) formed in the hole of the sealing ring 16. Alternatively, the sealing element 74 may be fitted into an annular groove formed on the outer surface of the sealing ring 20. In the example shown, the sealing element 74 is labyrinth type. Alternatively, the sealing element 74 may be friction type.

[0074] During maintenance operations, the method for disassembling and reassembling the sealing module 32 can be performed as follows.

[0075] In the first step, such as Figure 3 As shown, remove screws 60 and 72, and completely remove the sealing module 32 and position it on the ground.

[0076] In the second step, all components of the sealing module 32 are disassembled. Figure 4 In the third step shown, the support 50 is placed separately on the ground.

[0077] Then, in Figure 5 In the fourth step shown, the new seals 52, 54 and gasket 66 are placed on the carrier 50. Figure 6 In the fifth step shown, the friction ring 58 is placed inside the hole of the carrier 50 so that the lips of the seals 52 and 54 are properly positioned.

[0078] Then, in Figure 7 In the sixth step shown, gasket 68 and new seal 56 are placed on carrier 50. Carrier 50 supports new seals 52 to 56 and gaskets 66 and 68.

[0079] Finally, in the seventh step, as Figure 8 As shown, the entire sealing module 32 with the new seal is repositioned, and the entire sealing module 32 is secured to the outer sealing ring 16 and the inner sealing ring 20 using screws 60 and 72. The spacer 70 is not reused. Figure 2 This causes the contact area between the new seals 52 to 56 and the friction ring 58 to shift (or offset).

[0080] In fact, compared to Figure 2 The first position of the friction ring 58 with spacer 70 shown is as follows: Figure 8 In the second position shown, the friction ring 58 is axially displaced relative to the seals 52 to 56. Each lip 52b to 56b of the seals comes into contact with the new running surface of the friction ring 58.

[0081] In this second position without spacers, the friction ring 58 directly abuts against the sealing ring 20 of the inner ring in the axial direction. The radial portion 58b of the friction ring directly abuts against the sealing ring 20.

[0082] The initial dimension of the axial clearance 66 between the friction ring 58 and the sealing ring 20 is (e.g.) Figure 2 The friction ring 58 is displaced axially by a thickness greater than that of the spacer 70 (as shown). In the example shown, a small axial gap 66 exists at the second position of the friction ring 58. Alternatively, the axial gap 66 initially provided between the friction ring 58 and the sealing ring 20 can be equal in size to the axial thickness of the spacer 70.

[0083] In the previously described disassembly and reassembly method, the old seal is replaced with a new one. Alternatively, the sealing device can be disassembled from the outer sealing ring 16 and the inner sealing ring 20 to remove only the spacer 70, i.e., without replacing the seal.

[0084] In the example shown, both the outer ring 10 and the inner ring 12 include rolling rings 14 and 18 and sealing rings 16 and 20 fixed to the rolling rings. Alternatively, the outer ring 10 and the inner ring 12 may be without sealing rings. In this case, the friction ring 58 is reversibly (or detachably) fixed to the rolling ring 18, and the carrier 50 is reversibly (or detachably) fixed to the rolling ring 14.

[0085] As mentioned earlier, in the example shown, the first ring 10 is a fixed outer ring, while the second ring 12 is a rotating inner ring. Alternatively, a reverse configuration can be provided, where the first ring forms a fixed inner ring and the second ring forms a rotating outer ring. In this case, the friction ring can be reversibly (or detachably) fixed to the outer ring, and the carrier can be reversibly (or detachably) fixed to the inner ring.

[0086] In the described example, the rolling bearing has three rows of rolling elements. Alternatively, the rolling bearing may include only one row of rolling elements, or two rows of rolling elements, or four or more rows of rolling elements. In the example shown, the rolling elements are rollers. The rolling bearing may include other types of rolling elements, such as balls. In another variation, the bearing may also be a plain bearing without rolling elements.

Claims

1. A bearing comprising a first ring (10) and a second ring (12) and at least one seal (52), the first ring (10) and the second ring (12) being rotatable concentrically relative to each other, the at least one seal (52) being provided with at least one sealing lip (52b), characterized in that, The bearing further includes a sealing module (32), the sealing module (32) comprising: The carrier (50) is reversibly fixed to the first ring (10), and the seal (52) is mounted to contact the carrier in the radial direction. The friction ring (58) is reversibly fixed to the second ring (12), and the sealing lip (52b) of the seal contacts the friction ring (58). At least one spacer element (70) is axially positioned between the friction ring (58) and the second ring (12). In the first position, the friction ring (58) contacts the sealing lip (52b) of the seal in the axial direction between the friction ring (58) and the second ring (12) via the at least one spacer element (70). At a second position spaced axially from the first position, the friction ring (58) contacts the sealing lip (52b) of the seal in such a manner that at least one spacer element (70) is removed.

2. The bearing according to claim 1, characterized in that, It also includes at least one row of rolling elements (26) disposed between the first raceway (36) of the first revolution and the second raceway (34) of the second revolution.

3. The bearing according to claim 2, characterized in that, The first ring (10) includes at least one first rolling ring (14) provided with the first raceway (36) and a first sealing ring (16) fixed to the first rolling ring (14), wherein the carrier (50) of the sealing module is reversibly fixed to the first sealing ring (16) on the side opposite to the first rolling ring (14) in the axial direction.

4. The bearing according to claim 3, characterized in that, The second ring (12) includes at least one second rolling ring (18) provided with the second raceway (34) and a second sealing ring (20) fixed to the second rolling ring (18), wherein the friction ring (58) of the sealing module is reversibly fixed to the second sealing ring (20) on the side opposite to the second rolling ring (18) in the axial direction.

5. The bearing according to claim 4, characterized in that, The spacer element (70) of the sealing module is axially positioned between the friction ring (58) and the second sealing ring (20) of the second ring.

6. The bearing according to claim 4, characterized in that, It also includes at least one sealing element (74) which is radially disposed between the first sealing ring (16) and the second sealing ring (20) and axially located between the sealing module (32) and the first rolling ring (14) and the second rolling ring (18).

7. The bearing according to claim 2, characterized in that, The second ring (12) includes at least one second rolling ring (18) provided with the second raceway (34) and a second sealing ring (20) fixed to the second rolling ring (18), wherein the friction ring (58) of the sealing module is reversibly fixed to the second sealing ring (20) on the side opposite to the second rolling ring (18) in the axial direction.

8. The bearing according to any one of claims 1 to 3, characterized in that, The friction ring (58) of the sealing module is provided with an axial portion (58a) and a radial portion (58b), the sealing lip (52b) of the seal contacts the axial portion (58a), and the spacer element (70) is axially located between the radial portion (58b) of the friction ring and the second ring (12).

9. The bearing according to any one of claims 1 to 3, characterized in that, The carrier (50) of the sealing module is provided with an axial portion (50a) and a radial portion (50b). The sealing member (52) contacts the axial portion (50a) of the carrier (50) in the radial direction, and the radial portion (50b) of the carrier (50) extends toward the friction ring (58).

10. The bearing according to any one of claims 1 to 3, characterized in that, The carrier (50) of the sealing module is installed in the annular groove (16a) of the first ring (10).

11. The bearing according to any one of claims 1 to 3, characterized in that, An axial gap (66) is provided between the friction ring (58) of the sealing module and the second ring (12), the size of the axial gap (66) being equal to or greater than the axial thickness of the spacer element (70) of the sealing module.

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