Sliding slewing bearing

Abstract

The utility model relates to a kind of sliding slewing bearing, comprising: combined inner ring, combined inner ring outer periphery direction is set with bearing outer ring by sliding assembly and is slidably matched, boss is annularly equipped on the inner periphery surface of bearing outer ring, annular groove that is compatible with the boss of bearing outer ring is set on the outer periphery surface of combined inner ring;Two end faces of boss form two columns axial slide between the two sides of annular groove opposite;The inner wall between the inner diameter of boss and annular groove corresponds forms radial slide;Sliding assembly is set in two columns axial slide and radial slide;Sealing mechanism is respectively set between upper outer periphery surface and upper step platform, between lower outer periphery surface and outer ring lower end face;The bearing interior adopts complete sliding friction structure, raceway is designed as sliding friction structure, sliding block of pressure-resistant wear-resistant material is designed between raceway, increase the contact area between raceway and sliding block, to enhance the carrying capacity of slewing bearing, axial force, radial force and overturning moment can be simultaneously supported.

Description

Technical Field

[0001] This utility model relates to a sliding slewing bearing, which is applied to marine equipment and belongs to the field of bearing technology. Background Technology

[0002] With the increasing national demand for oil, offshore oil exploration projects are gradually increasing. The increasing size and weight of offshore equipment structural components have placed higher demands on offshore lifting, resulting in increasingly heavier offshore cranes. Currently, large-tonnage floating cranes mostly use roller slewing bearings. However, due to structural limitations, these slewing bearings cannot meet the requirements of increasingly larger lifting capacities within a limited space. Utility Model Content

[0003] In order to meet the performance requirements of marine equipment to achieve high load-bearing capacity and withstand overturning moment, this utility model designs a sliding slewing bearing in terms of load-bearing capacity and overturning force resistance. It has the characteristics of strong load-bearing capacity, overturning moment resistance, and long service life, thus meeting the operational requirements of marine equipment.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a sliding slewing bearing, comprising: a combined inner ring, wherein the combined inner ring is slidably fitted with the outer ring of the bearing via a sliding component in the outer circumferential direction; a boss is provided on the inner circumferential surface of the outer ring of the bearing; an annular groove adapted to the boss of the outer ring of the bearing is provided on the outer circumferential surface of the combined inner ring, the boss being located within the annular groove; two rows of axial slides are formed between the upper and lower end faces of the boss and the two sides opposite to the annular groove; a radial slide is formed between the inner diameter of the boss and the inner wall corresponding to the annular groove; a sliding component is provided in the two rows of axial slides and the radial slide; an upper outer circumferential surface and a lower outer circumferential surface are respectively formed on the outer circumferential surface of the combined inner ring located on both sides of the annular groove; the upper end face of the outer ring boss and the upper end face of the outer ring, and the lower end face of the outer ring boss and the lower end face of the outer ring each form a stepped structure, namely an upper stepped platform and a lower stepped platform; sealing mechanisms are respectively provided between the upper outer circumferential surface and the upper stepped platform, and between the lower outer circumferential surface and the lower end face of the outer ring; Furthermore, in the two axial slides, the axial slide between the upper surface of the outer ring boss and the side of the inner ring annular groove that is close to it is the main push slide, while the axial slide between the lower surface of the outer ring boss and the side of the inner ring annular groove that is close to it is the auxiliary push slide. Furthermore, the sliding assembly includes: a main sliding block, an auxiliary sliding block, and a radial sliding block; the main sliding block is disposed in the main sliding track and has surface contact with the contact surface of the main sliding track; the auxiliary sliding block is disposed in the auxiliary sliding track and has surface contact with the contact surface of the auxiliary sliding track; the radial sliding block is disposed in the radial sliding track and has surface contact with the contact surface of the radial sliding track. Furthermore, the main push sliding block, the auxiliary push sliding block, and the radial sliding block are all integral ring structures; the cross-section of the radial sliding block is rectangular; the main push sliding block and the auxiliary push sliding block have the same structural design. Furthermore, both the main sliding block and the auxiliary sliding block have rounded corners and a sloping transition near one corner; the slope of the main sliding block and the inclination angle between the main sliding block and the lower plane of the main sliding block are 30°; the slope of the auxiliary sliding block and the inclination angle between the auxiliary sliding block and the upper plane of the auxiliary sliding block are 30°. Furthermore, the ramp design positions of the main pusher block and the auxiliary pusher block are close to the inner diameter of the outer ring boss and the chamfers of the upper and lower end faces of the outer ring boss, respectively. Furthermore, the combined inner ring is composed of a first half inner ring and a second half inner ring, and a stop fit structure is provided between the mating surfaces of the two; the second half inner ring has an outer flange design, forming an outer diameter surface and an upper end surface of the outer flange; Furthermore, the first half of the inner ring and the second half of the inner ring have different axial dimensions, and the annular groove is formed on the lower end face of the first half of the inner ring and the outer diameter surface and the upper end face of the outer flange of the second half of the inner ring. Furthermore, the main push slide is formed by the lower end face of the first half inner ring and the upper end face of the outer ring boss, the auxiliary push slide is formed by the lower end face of the outer ring boss and the upper end face of the outer flange of the second half inner ring, and the radial slide is formed by the outer diameter surface of the second half inner ring and the inner diameter surface of the outer ring boss.

[0005] Furthermore, the sealing mechanism between the upper outer circumference and the upper stepped platform is a first sealing mechanism. The first sealing mechanism adopts a claw-type multi-lip sealing ring design, including: a sealing ring root, a sealing ring tail, and a first sealing lip, a second sealing lip, and a third sealing lip opposite to the sealing ring tail. The upper stepped platform area of ​​the outer ring is provided with a vertical sealing groove and a horizontal sealing platform. The sealing ring root is inserted into the vertical sealing groove and is interference-fitted with the vertical sealing groove. The sealing ring tail rests on the horizontal sealing platform. A sealing groove is formed on the upper outer circumferential surface of the first half inner ring corresponding to the three sealing lips. The upper surface of the sealing groove is a horizontal surface, and the lower surface is designed with a downward slope. The first sealing lip is interference-fitted on the upper outer circumferential surface, the second sealing lip is interference-fitted on the horizontal surface of the sealing groove, and the third sealing lip is interference-fitted on the downward slope on the lower surface of the sealing groove.

[0006] Furthermore, the sealing mechanism between the lower outer circumferential surface and the lower end surface of the inner ring is a second sealing mechanism. The second sealing mechanism adopts a single-lip sealing ring structure design, with a protrusion at the root of the sealing ring and an upward-sloping sealing lip at the end of the sealing ring; a horizontal sealing groove is opened on the lower outer circumference of the second semi-inner ring, and the protrusion at the root of the sealing ring is inserted into the horizontal sealing groove and interference fits with the horizontal sealing groove, and the sealing lip rests on the lower end face of the bearing after installation.

[0007] Furthermore, in order to adapt to the requirements of the marine working environment, the entire outer surface of the support is coated with two layers of anti-corrosion spraying. The inner layer of the support surface is a zinc layer and the outer layer is a paint layer. The anti-corrosion technology of first spraying zinc and then spraying paint is adopted.

[0008] The beneficial effects of this utility model are: The bearing adopts a fully sliding friction structure inside, and the raceway is designed as a sliding friction structure. By designing a slider made of pressure-resistant and wear-resistant material between the raceways, the contact area between the raceways and the slider is increased, thereby enhancing the bearing capacity of the slewing bearing. It can simultaneously withstand axial force, radial force, and overturning moment. A special sealing structure is adopted to enhance the dustproof effect of the bearing and increase its service life; The bearing surface is treated with anti-corrosion coating to increase the bearing's corrosion resistance and ensure that the bearing can be used at sea for a long time without rusting; it has the advantages of long service life and high reliability, meeting the requirements of marine equipment. Attached Figure Description

[0009] Figure 1 This is a structural diagram of the sliding slewing bearing of this utility model.

[0010] Figure 2 This is a detailed structural diagram of the main pusher sliding block of a sliding slewing bearing.

[0011] Figure 3 This is a detailed structural diagram of the auxiliary sliding block of a sliding slewing bearing.

[0012] Figure 4 This is an enlarged view of the first sealing mechanism of the sliding slewing bearing of this utility model.

[0013] Figure 5 This is an enlarged view of the second sealing mechanism of the sliding slewing bearing of this utility model.

[0014] Figure 6 This is a diagram of the anti-corrosion structure of the sliding slewing bearing of this utility model.

[0015] In the figure, 1. Bearing outer ring, 2. Boss, 3. Upper outer peripheral surface, 4. Lower outer peripheral surface, 5. Upper end face of outer ring, 6. Lower end face of outer ring, 7. Main push sliding block, 7.1. Slope of main push sliding block, 7.2. Lower plane of main push sliding block, 8. Auxiliary push sliding block, 8.1. Slope of auxiliary push sliding block, 8.2. Upper plane of auxiliary push sliding block, 9. Radial sliding block, 10. Chamfer of arc curve, 11. First half inner ring, 12. Second half inner ring, 12.1. Outer flange, 13. First sealing mechanism, 13.1. Root of sealing ring, 13.2. Tail of sealing ring, 13.3. First sealing lip, 13.4. Second sealing lip, 13.5. Third sealing lip, 14. Second sealing mechanism, 14.1. Protrusion, 14.2. Sealing lip, 15. Zinc layer, 16. Paint layer. Detailed Implementation

[0016] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0017] like Figure 1-6 A sliding slewing bearing is shown, comprising: a combined inner ring, the outer circumference of which is slidably fitted with an outer ring 1 via a sliding assembly; a boss 2 is provided on the inner circumferential surface of the outer ring 1; an annular groove adapted to the boss 2 of the outer ring 1 is provided on the outer circumferential surface of the combined inner ring, the boss 2 being located within the annular groove; two rows of axial slideways are formed between the upper and lower end faces of the boss 2 and the two opposite sides of the annular groove; a radial slideway is formed between the inner diameter of the boss 2 and the inner wall corresponding to the annular groove; a sliding assembly is provided in the two rows of axial and radial slideways; an upper outer circumferential surface 3 and a lower outer circumferential surface 4 are respectively formed on the outer circumferential surfaces of the combined inner ring located on both sides of the annular groove; the upper end face of the boss 2 of the outer ring and the upper end face 5 of the outer ring, and the lower end face of the boss 2 of the outer ring and the lower end face 6 of the outer ring each form a stepped structure, namely an upper stepped platform and a lower stepped platform; sealing mechanisms are respectively provided between the upper outer circumferential surface 3 and the upper stepped platform, and between the lower outer circumferential surface 4 and the lower end face 6 of the outer ring; Furthermore, in the two axial slides, the axial slide between the upper end face of the outer ring boss 2 and the side of the inner ring annular groove that is close to it is the main push slide, and the axial slide between the lower end face of the outer ring boss 2 and the side of the inner ring annular groove that is close to it is the auxiliary push slide. Furthermore, the sliding assembly includes: a main push sliding block 7, an auxiliary push sliding block 8, and a radial sliding block 9; the main push sliding block 7 is disposed in the main push slide and has surface contact with the contact surface of the main push slide; the auxiliary push sliding block 8 is disposed in the auxiliary push slide and has surface contact with the contact surface of the auxiliary push slide; the radial sliding block 9 is disposed in the radial slide and has surface contact with the contact surface of the radial slide. Furthermore, the main sliding block 7, the auxiliary sliding block 8, and the radial sliding block 9 are all integral ring structures; the cross-section of the radial sliding block 9 is rectangular; the main sliding block 7 and the auxiliary sliding block 8 have the same structural design. Furthermore, both the main sliding block 7 and the auxiliary sliding block 8 have rounded corners and a sloping transition near one corner; the inclination angle between the slope 7.1 of the main sliding block and the lower plane 7.2 of the main sliding block is 30°; the inclination angle between the slope 8.1 of the auxiliary sliding block and the upper plane 8.2 of the auxiliary sliding block is 30°. Furthermore, the ramp design positions of the main push sliding block 7 and the auxiliary push sliding block 8 are close to the inner diameter of the outer ring boss 2 and the chamfers of the upper and lower end faces of the outer ring boss 2, respectively. This ramp design structure of the main push sliding block 7 and the auxiliary push sliding block 8 is to increase the length of the slider. Increasing the length of the slider can increase the bearing load capacity. The main push sliding block 7 and the auxiliary push sliding block 8 are placed on their respective raceway surfaces to prevent the slider edge from interfering with the bearing internal retaining edge. It should be noted that the design parameters for the chamfer size (R1, R), the distance (d1, d) between the ramp and its adjacent chamfer, and the thickness (H1, H) of the main push sliding block 7 and the auxiliary push sliding block 8 are different. The specific values ​​are calculated based on the bearing capacity.

[0018] Furthermore, the combined inner ring is composed of a first half inner ring 11 and a second half inner ring 12, and a stop fit structure is provided between the mating surfaces of the two; the second half inner ring 11 is designed with an outer flange 12.1, forming an outer diameter surface and an upper end surface of the outer flange; Furthermore, the first half-inner ring 11 and the second half-inner ring 12 have different axial dimensions, and the annular groove is formed on the lower end face of the first half-inner ring 11 and the outer diameter surface and the upper end face of the outer flange of the second half-inner ring 12. Furthermore, the main push slide is formed by the lower end face of the first half inner ring 11 and the upper end face of the outer ring boss 2, the auxiliary push slide is formed by the lower end face of the outer ring boss 2 and the upper end face of the outer flange 12.1 of the second half inner ring, and the radial slide is formed by the outer diameter surface of the second half inner ring 12 and the inner diameter surface of the outer ring boss 2.

[0019] Furthermore, the sealing mechanism between the upper outer peripheral surface 3 and the upper stepped platform is a first sealing mechanism 13. The first sealing mechanism adopts a claw-type multi-lip sealing ring sealing design, including: a sealing ring root 13.1, a sealing ring tail 13.2, and a first sealing lip 13.3, a second sealing lip 13.4, and a third sealing lip 13.5 opposite to the sealing ring tail 13.2; the upper stepped platform area of ​​the outer ring 1 is provided with a vertical sealing groove and a horizontal sealing platform, the sealing ring root 13.1 is inserted into the vertical sealing groove and is interference-fitted with the vertical sealing groove; the sealing ring tail 13.2 is placed on the horizontal sealing platform; A sealing groove is provided on the upper outer peripheral surface 3 of the first half inner ring 11 corresponding to the three sealing lips. The upper surface of the sealing groove is a horizontal surface, and the lower surface is designed with a downward slope. The first sealing lip 13.3 is interference-fitted on the upper outer peripheral surface 3, the second sealing lip 13.4 is interference-fitted on the horizontal surface of the sealing groove, and the third sealing lip 13.5 is interference-fitted on the downward slope on the lower surface of the sealing groove.

[0020] It should be noted that in the first sealing mechanism 13, the root 13.1 of the sealing ring is inserted into the vertical sealing groove to achieve installation and fixation, while the tail 13.2 of the sealing ring is set on the horizontal sealing platform to prevent the sealing ring from moving radially and coming out of the sealing groove. The aforementioned claw-type multi-lip sealing ring has an interference fit with each part of the first half inner ring 11 and outer ring 1. The interference amount is a specific value, which ensures that the sealing ring is firmly installed and has a good sealing effect.

[0021] Furthermore, the sealing mechanism between the lower outer peripheral surface 4 and the lower end surface 6 of the outer ring is a second sealing mechanism 14. The second sealing mechanism 14 adopts a single-lip sealing ring structure design, with a protrusion 14.1 at the root of the sealing ring and an upwardly inclined sealing lip 14.2 at the end of the sealing ring. A horizontal sealing groove is provided on the lower outer peripheral surface 4 of the second semi-inner ring 12. The protrusion 14.1 at the root of the sealing ring is inserted into the horizontal sealing groove and is interference-fitted with the horizontal sealing groove. After installation, the sealing lip 14.2 rests on the lower end surface 5 of the bearing outer ring. It should be noted that the second sealing mechanism 14 ensures that the sealing ring is always in a bent state by the interference fit and hardness of the sealing ring, thus ensuring the dustproof effect.

[0022] Furthermore, to adapt to the requirements of the marine working environment, this solution employs a two-layer anti-corrosion coating on the entire outer surface of the support. The inner layer of the support surface is a zinc layer 15, and the outer layer is a paint layer 16. This anti-corrosion technique of first spraying zinc and then painting increases the bearing's corrosion resistance, ensuring that the bearing can be used at sea for extended periods without rusting. Specifically, the entire inner layer of the support is fully coated with a zinc layer 15, while the outer paint layer 16 is sprayed onto the non-installation surface of the bearing. The bearing installation surface does not require painting. This design prevents the nut from slipping due to contact with the painted surface during installation, which could cause the nut to be loose or unable to be tightened properly.

[0023] The key to this invention lies in the fact that the entire slide and the slider are in surface contact. Under the condition of constant force, the contact area is increased and the contact stress is reduced. Under the same cross-section, the bearing adopts a sliding structure, which greatly enhances the load-bearing capacity.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A sliding slewing bearing, characterized in that, include: The combined inner ring is slidably fitted to the outer ring of the bearing via a sliding assembly in the outer circumferential direction. A boss is provided on the inner circumferential surface of the outer ring, and an annular groove adapted to the boss is provided on the outer circumferential surface of the combined inner ring. The boss is located within the annular groove. Two axial slideways are formed between the upper and lower end faces of the boss and the two opposite sides of the annular groove. A radial slideway is formed between the inner diameter of the boss and the corresponding inner wall of the annular groove. Sliding assemblies are installed in the two axial and radial slideways. The outer circumferential surfaces of the combined inner ring located on both sides of the annular groove form an upper outer circumferential surface and a lower outer circumferential surface, respectively. The upper end face of the outer ring boss and the upper end face of the outer ring, and the lower end face of the outer ring boss and the lower end face of the outer ring, each form a stepped structure, i.e., an upper stepped platform and a lower stepped platform. Sealing mechanisms are provided between the upper outer circumferential surface and the upper stepped platform, and between the lower outer circumferential surface and the lower end face of the outer ring, respectively.

2. A sliding slewing bearing according to claim 1, characterized in that, In the two rows of axial slides, the axial slide between the upper surface of the outer ring boss and the side of the inner ring annular groove that is close to it is the main push slide, and the axial slide between the lower surface of the outer ring boss and the side of the inner ring annular groove that is close to it is the auxiliary push slide.

3. A sliding slewing bearing according to claim 2, characterized in that, The sliding assembly includes: a main sliding block, an auxiliary sliding block, and a radial sliding block; the main sliding block is disposed in the main sliding track and its contact surface with the main sliding track is in surface contact; the auxiliary sliding block is disposed in the auxiliary sliding track and its contact surface with the auxiliary sliding track is in surface contact; the radial sliding block is disposed in the radial sliding track and its contact surface with the radial sliding track is in surface contact.

4. A sliding slewing bearing according to claim 3, characterized in that, The main pusher slider, auxiliary pusher slider, and radial slider are all integral ring structures; the radial slider has a rectangular cross-section; the main pusher slider and auxiliary pusher slider have the same structural design.

5. A sliding slewing bearing according to claim 3, characterized in that, Both the main sliding block and the auxiliary sliding block have rounded corners and a sloping transition near one corner; the slope of the main sliding block and the inclination angle between the main sliding block and the lower plane of the main sliding block are 30°; the slope of the auxiliary sliding block and the inclination angle between the auxiliary sliding block and the upper plane of the auxiliary sliding block are 30°.

6. A sliding slewing bearing according to claim 5, characterized in that, The ramps of the main sliding block and the auxiliary sliding block are positioned close to the inner diameter of the outer ring boss and the chamfers of the upper and lower end faces of the outer ring boss, respectively.

7. A sliding slewing bearing according to claim 2, characterized in that, The combined inner ring is composed of a first half inner ring and a second half inner ring, and a stop fit structure is provided between their mating surfaces; the second half inner ring has an outer flange design, forming an outer diameter surface and an upper end surface of the outer flange; the first half inner ring and the second half inner ring have different axial dimensions, and the annular groove is formed on the lower end surface of the first half inner ring and the outer diameter surface and the upper end surface of the outer flange of the second half inner ring.

8. A sliding slewing bearing according to claim 7, characterized in that, The main push slide is formed by the lower end face of the first half inner ring and the upper end face of the outer ring boss. The auxiliary push slide is formed by the lower end face of the outer ring boss and the upper end face of the outer flange of the second half inner ring. The radial slide is formed by the outer diameter surface of the second half inner ring and the inner diameter surface of the outer ring boss.

9. A sliding slewing bearing according to claim 7, characterized in that, The sealing mechanism between the upper outer circumference and the upper stepped platform is the first sealing mechanism. The first sealing mechanism adopts a claw-type multi-lip sealing ring sealing design, including: a sealing ring root, a sealing ring tail, and a first sealing lip, a second sealing lip, and a third sealing lip opposite to the sealing ring tail. The upper stepped platform area of ​​the outer ring is provided with a vertical sealing groove and a horizontal sealing platform. The sealing ring root is inserted into the vertical sealing groove and is interference-fitted with the vertical sealing groove. The sealing ring tail is placed on the horizontal sealing platform. A sealing groove is formed on the upper outer circumferential surface of the first half inner ring corresponding to the three sealing lips. The upper surface of the sealing groove is a horizontal surface, and the lower surface is designed with a downward slope. The first sealing lip is interference-fitted on the upper outer circumferential surface, the second sealing lip is interference-fitted on the horizontal surface of the sealing groove, and the third sealing lip is interference-fitted on the downward slope on the lower surface of the sealing groove.

10. A sliding slewing bearing according to claim 7, characterized in that, The sealing mechanism between the lower outer circumferential surface and the lower end face of the inner ring is the second sealing mechanism. The second sealing mechanism adopts a single-lip sealing ring structure design, with a protrusion at the root of the sealing ring and an upwardly inclined sealing lip at the end of the sealing ring. A horizontal sealing groove is opened on the lower outer circumferential surface of the second half inner ring. The protrusion at the root of the sealing ring is inserted into the horizontal sealing groove and is interference-fitted with the horizontal sealing groove. After installation, the sealing lip rests on the lower end face of the bearing outer ring.

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