Sealing device and sealing assembly
By setting up a pumping groove on the stop ring of the sealing device, the wear and leakage of traditional sealing devices in the environment of metal-containing oil is solved, and a longer service life and better sealing performance are achieved.
Patent Information
- Application Number
- CN202311360602.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-19
- Publication Date
- 2025-04-22
AI Technical Summary
Traditional sealing devices are prone to failure due to wear and leakage in engine oil environments containing metal particles.
A sealing device is designed, including an annular frame and an elastic seal. A stop ring is provided on the frame. There is a pumping groove on one side of the stop ring. The pumping groove can collect and throw away particles from the engine oil to prevent it from entering the sealing lip.
Effectively prevent metal particles from invading the sealing lip, extend the service life of the sealing device, and improve sealing performance, suitable for working conditions of clockwise and counterclockwise rotation.
Smart Images
Figure CN119860437A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of sealing technology, and in particular to a sealing device and a sealing assembly for dynamic sealing. Background Art
[0002] Sealing devices need to be installed in the rotating parts of many machines. In particular, in the field of wheel bearings of vehicles, dynamic seals with high sealing performance and low friction torque are required. These sealing devices are usually annular and include a frame and an elastic sealing body. The frame is made of metal or other rigid materials so that it can be fixed on the rotating part on the radial outside by interference fit. The elastic sealing body is fixed to the frame and extends one or more sealing lips. Some of the sealing lips can be pressed on the surface of the sealed part by an annular spring.
[0003] In applications such as vehicle wheels, the two sides of the seal may be in different liquid environments, for example, oil on one side and grease on the other. However, sometimes the oil may not be absolutely clean, for example, there may be many metal particles from the transmission in the oil. The metal particles may enter the contact surface between the sealing lip and the sealed component, causing wear of the sealing lip. Due to this wear, this type of traditional seal may fail quickly, resulting in leakage. Summary of the invention
[0004] In order to solve the above technical problems, the present invention provides a sealing device and a sealing assembly.
[0005] In the first aspect, an embodiment of the present invention provides a sealing device including: a skeleton, which is annular and arranged around a rotation axis; an elastic sealing body, which is annular, coaxially fixed with the skeleton, and includes a main sealing lip extending radially inward; the elastic sealing body is separated into a first sealing side and a second sealing side in the axial direction; a stop ring, which is fixed on the skeleton, and the stop ring has a radial section of the stop ring extending radially inward and not exceeding the main sealing lip; the stop ring and the elastic sealing body are arranged opposite to each other in the axial direction. Wherein, in the axial direction, at least one pumping groove is provided on the side of the stop ring away from the elastic sealing body; the pumping groove extends from the radial inner edge of the stop ring toward the radial outer side, and the circumferential size of the pumping groove gradually decreases in the radial outward direction.
[0006] According to some embodiments of the present invention, the pumping groove extends from the radially inner edge of the stop ring toward the radially outer side, and is inclined in a circumferential clockwise or counterclockwise direction.
[0007] According to some embodiments of the present invention, the stop ring is provided with a plurality of pumping grooves evenly distributed along the circumferential direction, and the plurality of pumping grooves are inclined toward the same clockwise direction of the circumferential direction.
[0008] According to some embodiments of the present invention, the stop ring is provided with a plurality of pumping grooves, wherein a portion of the pumping grooves extends from the radially inner edge of the stop ring toward the radially outer side and is inclined in a circumferential clockwise direction; another portion of the pumping grooves extends from the radially inner edge of the stop ring toward the radially outer side and is inclined in a circumferential counterclockwise direction.
[0009] According to some embodiments of the present invention, two pumping grooves inclined in the clockwise and counterclockwise directions of the circumference are adjacently arranged as a pumping groove pair, and the stop ring has a plurality of pumping groove pairs evenly distributed along the circumference.
[0010] According to some embodiments of the present invention, the skeleton includes a skeleton axial section and a skeleton radial section, and the stop ring includes a stop ring axial section and a stop ring radial section; the stop ring axial section is fixed on the radial inner side of the skeleton axial section.
[0011] According to some embodiments of the present invention, the elastic sealing body further includes an annular secondary sealing lip; in the axial direction, the primary sealing lip is close to the first sealing side, and the secondary sealing lip is close to the second sealing side.
[0012] According to some embodiments of the present invention, the depth dimension of the pumping groove in the axial direction gradually decreases in the radially outward direction.
[0013] According to some embodiments of the present invention, the pumping groove has a side wall arranged along an edge thereof, and an angle between the side wall and the radial section of the stop ring is greater than 90 degrees and less than 180 degrees.
[0014] In a second aspect, a sealing assembly is also provided according to an embodiment of the present invention, the sealing assembly comprising a sealing device as described above and an element rotating relative to the sealing device, the main sealing lip contacts the circumferential surface of the element, and the element is a bearing inner ring, an end cover or a shaft.
[0015] According to the sealing device provided by the embodiment of the present invention, in general industrial or vehicle systems, especially in working conditions with particles, a stop ring is arranged in the sealing device, and a pumping groove is arranged on one axial side of the stop ring, and the pumping groove can collect particles and other impurities in the engine oil; under the action of centrifugal force, the foreign particles can be thrown radially outward and away from the sealing lip. Furthermore, the pumping grooves are arranged in plurality, and two of the pumping grooves inclined in the clockwise and counterclockwise directions of the circumference are arranged adjacent to each other as a pair, and the stop ring has a plurality of pumping groove pairs evenly distributed along the circumference. Therefore, the sealing device can be suitable for both clockwise and counterclockwise rotating working conditions.
[0016] By effectively preventing metal particles from invading the sealing lip, the service life of the sealing device working in an engine oil environment containing metal particles can be greatly extended. This stop ring can also provide additional radial force for the frame of the sealing device to ensure that the frame and the outer ring are in good contact and maintain good fixing performance. Therefore, the sealing device provided with the stop ring as described above can greatly improve the sealing performance of the sealing device. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.
[0018] Figure 1 A partial cross-sectional view of a sealing device according to some embodiments of the present invention is shown;
[0019] Figure 2 A partial perspective view of a sealing device according to some embodiments of the present invention is shown;
[0020] Figure 3 A perspective view showing a stop ring according to some embodiments of the present invention; and
[0021] Figure 4 Partial cross-sectional views of sealing devices according to other embodiments of the present invention are shown.
[0022] It should be understood that the above drawings are merely schematic and are not drawn according to actual scale. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.
[0024] According to an embodiment of the present invention, a sealing device is provided. This sealing device is used to seal between various rotating parts that need to be sealed, for example, it can be installed between the outer ring and the inner ring of the bearing, or between the bearing and the rotating shaft. In application scenarios such as vehicle hubs, the two sides of the sealing device may be different liquid environments, for example, one side is engine oil and the other side is grease, and there may be many metal particles from, for example, a transmission on the engine oil side. The sealing device is particularly suitable for sealing scenarios with metal particle working conditions.
[0025] Figure 1 A partial cross-sectional view of a sealing device according to an embodiment of the present invention is shown. The sealing device is annular in shape as a whole. Figure 1 What is shown in FIG. is a representative portion of a cross section parallel to the central axis of the ring. Figure 1 As shown, the sealing device is installed in the annular space between two sealed parts. In this embodiment, the two sealed parts can be, for example, the outer ring 10 and the inner ring 20 of the bearing. The outer ring 10 and the inner ring 20 are basically arranged around a common rotation axis and can rotate relative to each other around the rotation axis, wherein the outer ring 10 is located radially outside the inner ring 20. The central axis of the sealing device is arranged to substantially coincide with the rotation axis of the bearing.
[0026] like Figure 1 As shown, the sealing device may include an annular skeleton 30 and an annular elastic sealing body 40 arranged around the rotation axis. The elastic sealing body 40 is fixed on the skeleton 30 and includes at least one sealing lip extending radially inward. The elastic sealing body 40 separates a first sealing side S1 and a second sealing side S2 in the axial direction. The skeleton 30 and the elastic sealing body 40 are coaxially arranged around the rotation axis.
[0027] The frame 30 can be made of a plastic material or a metal material with sufficient rigidity. The plastic material with sufficient rigidity can be various plastics with suitable mechanical properties, such as PA66. On the one hand, the plastic material has sufficient rigidity to provide structural support for the elastic sealing body 40, and on the other hand, the plastic material is low in cost and easy to process, for example, it can be conveniently formed into various required shapes by injection molding.
[0028] In this embodiment, the skeleton 30 may be fixed to the radial inner side of the outer ring 10 by interference fit, for example, so that the skeleton 30 may rotate relative to the inner ring 20 together with the outer ring 10 .
[0029] The elastic sealing body 40 can be made of an elastic material such as rubber. The elastic sealing body 40 includes a base 41 and a main sealing lip 42. The main sealing lip 42 extends from the base 41 generally in the radially inner direction. The main sealing lip 42 of the elastic sealing body 40 is an annular structure around the rotation axis. The base 41 and the main sealing lip 42 can be formed integrally. Figure 1 In the illustrated embodiment, the main sealing lip 42 in the installed state is schematically shown, and the main sealing lip 42 extends toward the inner ring 20 radially inward and contacts the outer surface of the inner ring 20 to form a sealing fit. The elastic sealing body 40 together with the frame 30 fixed thereto can rotate relative to the inner ring 20 together with the outer ring 10, so that a dynamic seal is formed at the annular gap between the outer ring 10 and the inner ring 20 in the sealing device.
[0030] Figure 2 A partial perspective view of a sealing device according to an exemplary embodiment of the present invention is shown. Figure 1 to Figure 2 As shown, the sealing device further includes a stop ring 50. The stop ring 50 is fixed on the skeleton 30 and extends radially inward. The stop ring 50 can be fixed on the radial inner side of the skeleton 30, for example, by interference fit, so that it can rotate relative to the inner ring 20 together with the skeleton 30 and the outer ring 10. In the axial direction, the stop ring 50 and the elastic sealing body 40 are arranged opposite to each other in the axial direction. Figure 1 As shown, the elastic sealing body 40 is arranged near the second sealing side S2, and the stop ring 50 is arranged near the first sealing side S1. In the radial direction, the end of the main sealing lip 42 of the elastic sealing body 40 facing radially inward exceeds the end of the stop ring 50 facing radially inward, so that when the sealing device is installed, the end of the main sealing lip 42 facing radially inward contacts the outer surface of the inner ring 20 to form a seal with the outer ring 10 and the inner ring 20, and at the same time, there is a certain gap between the end of the stop ring 50 facing radially inward and the outer surface of the inner ring 20, thereby ensuring that in the working state, the outer ring 10 and the inner ring 20 can rotate relative to each other around the rotation axis.
[0031] Furthermore, the first sealing side S1 is a side of the engine oil environment, and the second sealing side S2 is a side of the grease environment, so that the stop ring 50 close to the first sealing side S1 can absorb and collect foreign particles in the engine oil.
[0032] In some embodiments, at least one pumping groove 53 is provided on the side of the stop ring 50 facing the first sealing side S1, that is, the side away from the elastic sealing body 40 in the axial direction. The pumping groove 53 is recessed in the direction of the elastic sealing body 40. The pumping groove 53 forms an opening at the radially inner edge of the stop ring 50. The pumping groove 53 extends from the radially inner edge of the stop ring 50 toward the radially outer side, and the circumferential size of the pumping groove 53 gradually decreases in the radially outward direction.
[0033] In the working state, the outer ring 10 rotates relative to the inner ring 20, and the foreign particles from the first sealing side S1 are stopped on the surface of the rotating stop ring 50 on the side of its axis. Since there is a certain speed difference between the foreign particles and the rotating stop ring 50 in the circumferential direction, the foreign particles can be relatively displaced in the circumferential direction on the surface of the stop ring 50, so that the foreign particles fall into the pumping groove 53. Under the action of centrifugal force, the foreign particles move from the radial inside along the pumping groove 53 to the radial outside, so that the foreign particles can be kept away from the main sealing lip 42, reducing the wear of the bearing caused by the foreign particles entering between the main sealing lip 42 and the inner ring 20.
[0034] In some embodiments, the pumping groove 53 extends from the radially inner edge of the stop ring 50 toward the radially outer side, and is inclined toward the circumferential clockwise direction C1 or the counterclockwise direction C2.
[0035] Specifically, see Figure 2 As shown, when the pumping groove 53 is inclined toward the circumferential clockwise direction C1, a clockwise pumping groove 53a is formed. When the stop ring 50 rotates counterclockwise with the outer ring 10, the foreign particles fall into the clockwise pumping groove 53a because there is a certain speed difference between the foreign particles and the rotating stop ring 50 in the circumferential direction, and the foreign particles are more easily thrown radially outward under the action of centrifugal force, so that the foreign particles are away from the main sealing lip 42.
[0036] See again Figure 2 As shown, when the pumping groove 53 is inclined toward the circumferential counterclockwise direction C2, a counterclockwise pumping groove 53b is formed. When the stop ring 50 rotates clockwise with the outer ring 10, the foreign particles fall into the counterclockwise pumping groove 53b because there is a certain speed difference between the foreign particles and the rotating stop ring 50 in the circumferential direction, and the foreign particles are more easily thrown radially outward under the action of centrifugal force, so that the foreign particles are away from the main sealing lip 42.
[0037] In some embodiments, the stop ring 50 has a plurality of pumping grooves 53 evenly distributed along the circumference, and the plurality of pumping grooves 53 are inclined in the same clockwise direction of the circumference. For example, one axial side of the stop ring 50 is provided with a plurality of clockwise pumping grooves 53a evenly distributed along the circumference, or a plurality of counterclockwise pumping grooves 53b evenly distributed along the circumference.
[0038] In other embodiments, Figure 3 1 shows a perspective view of a stop ring according to some embodiments of the present invention. Figure 2 and Figure 3 As shown, the stop ring 50 has a plurality of pumping grooves 53. Part of the pumping grooves 53 extend from the radial inner edge of the stop ring 50 toward the radial outer side, and are inclined toward the circumferential clockwise direction C1, forming clockwise pumping grooves 53a; another part of the pumping grooves 53 extend from the radial inner edge of the stop ring 50 toward the radial outer side, and are inclined toward the circumferential counterclockwise direction C2, forming counterclockwise pumping grooves 53b.
[0039] like Figure 2 As shown, two pumping grooves 53 inclined toward the clockwise direction C1 and the counterclockwise direction C2 of the circumferential direction are arranged adjacent to each other as a group. That is, the clockwise pumping groove 53a and the counterclockwise pumping groove 53b are a pair, and are arranged adjacent to each other on one side of the axial direction of the stop ring 50. The stop ring 50 has a plurality of pumping groove pairs evenly distributed along the circumferential direction. When the stop ring 50 rotates counterclockwise with the outer ring 10, most of the foreign particles fall into the clockwise pumping groove 53a in the pumping groove pair, and under the action of centrifugal force, the foreign particles are more easily thrown radially outward, so that the foreign particles are away from the main sealing lip 42. When the stop ring 50 rotates clockwise with the outer ring 10, most of the foreign particles fall into the counterclockwise pumping groove 53b in the pumping groove pair, and under the action of centrifugal force, the foreign particles are more easily thrown radially outward, so that the foreign particles are away from the main sealing lip 42. Therefore, in this embodiment, a pair of pumping grooves with opposite circumferentially inclined structures are provided, which can be suitable for both clockwise and counterclockwise rotation working conditions of the bearing, and can achieve a good effect of stopping foreign particles and pumping out the foreign particles.
[0040] In some embodiments, the depth dimension of the pumping groove 53 in the axial direction gradually decreases in the radially outward direction, which is conducive to pumping and throwing out foreign particles from the sealing device.
[0041] In some embodiments, Figure 2As shown, the pumping groove 53 has a side wall 531 arranged along its edge, and there is a certain inclination angle between the side wall 531 and the radial section 52 of the stop ring, that is, an obtuse angle greater than 90 degrees and less than 180 degrees can be formed between the side wall 531 and the surface of the radial section 52 on the axial side of the stop ring, so that the pumping groove 53 can more easily pump and throw foreign particles out of the sealing device. It can be understood that a gradual smooth transition can be formed between the side wall 531 and the surface of the radial section 52 on the axial side of the stop ring, or a chamfer can be provided between the side wall 531 and the radial section 52 of the stop ring, which is conducive to pumping and throwing foreign particles out of the sealing device.
[0042] In some embodiments, see Figure 1 and Figure 2 As shown, the skeleton 30 includes a skeleton axial section 31 and a skeleton radial section 32; the stop ring 50 includes a stop ring axial section 51 and a stop ring radial section 52. The stop ring axial section 51 can be fixed on the radial inner side of the skeleton axial section 31 by interference fit or the like. Under the action of centrifugal force, the stop ring 50 can also provide additional radial force for the skeleton 30 to ensure that the skeleton 30 is in good contact with the outer ring 10 to maintain good fixing performance.
[0043] Figure 4 FIG. 2 shows a partial cross-sectional view of a sealing device according to some other embodiments of the present invention. Figure 4 As shown, in some embodiments, the elastic sealing body 40 is schematically shown to have two sealing lips, namely, an annular main sealing lip 42 and an annular secondary sealing lip 43. In the axial direction, the main sealing lip 42 is close to the first sealing side S1, and the secondary sealing lip 43 is close to the second sealing side S2. In the installed state, the main sealing lip 42 and the secondary sealing lip 43 extend toward the inner ring 20 on the radial inner side respectively, and form a sealing fit with the outer surface of the inner ring 20. Optionally, at least the main sealing lip 42 contacts the outer surface of the inner ring 20.
[0044] In some embodiments, in order to make the main sealing lip 42 more closely fit the outer surface of the inner ring 20, the sealing device can also include an annular spring 60. The spring 60 surrounds and is installed on the radial outer side of the main sealing lip 42 and presses the main sealing lip 42 radially inward, so that the main sealing lip 42 can be closely abutted against the inner ring 20.
[0045] The auxiliary sealing lip 43 may be an annular sheet-shaped sealing lip. In a cross-sectional view perpendicular to the rotation axis, a free end of the auxiliary sealing lip 43 may extend obliquely toward the radial inside and toward one side of the main sealing lip 42 .
[0046] In some embodiments, the elastic sealing body 40 is made of rubber material. The base 41, the primary sealing lip 42 and the secondary sealing lip 43 may be integrally molded.
[0047] In the present invention, a stop ring 50 is provided for the sealing device, and a pumping groove 53 is provided on one axial side of the stop ring 50, and the pumping groove 53 can collect particles and other impurities in the engine oil. Under the action of centrifugal force, the foreign particles can be thrown radially outward and away from the sealing lip. Furthermore, the pumping groove 53 is provided with a plurality of clockwise pumping grooves 53a and counterclockwise pumping grooves 53b, which are inclined toward the clockwise direction C1 and the counterclockwise direction C2 of the circumferential direction respectively, and are adjacently arranged as a pair, and the stop ring has a plurality of pumping groove pairs uniformly distributed along the circumference. Therefore, the sealing device can be suitable for both clockwise and counterclockwise rotation working conditions. By effectively preventing metal particles from invading the sealing lip, the service life of the sealing device working in an engine oil environment containing metal particles can be greatly extended.
[0048] According to an embodiment of the present invention, a sealing assembly is further provided. The sealing assembly comprises a sealing device according to any one of the above embodiments and an element rotating relative to the sealing device. The main sealing lip 42 contacts the circumferential surface of the element. The element may be a bearing inner ring, an end cover or a shaft, etc.
[0049] It should be noted that the present invention is intended to improve dynamic sealing, especially sealing devices under working conditions with foreign particles, so the technical solution of the present invention can be applied to various sealing devices, and is not limited to the specific components of the specific sealing devices shown in the embodiments. In this case, the structure and installation method of the stop ring 50 can be changed in various ways, and the number, shape and arrangement of the pumping grooves 53 can be changed in various ways, and are not limited to the types described in the embodiments and shown in the drawings.
[0050] Although possible embodiments are described by way of example in the above description, it should be understood that there are still a large number of variations of embodiments through the combination of all known and other technical features and embodiments that are easily conceivable to the skilled person. It should also be understood that the exemplary embodiment is only an example and that such an embodiment in no way limits the scope of protection, application and configuration of the present invention. The above description is more to provide the skilled person with a technical guide for converting at least one exemplary embodiment, wherein various changes can be made, especially changes in the functions and structures of the components, as long as they do not depart from the scope of protection of the claims.
[0051] Reference numerals list
[0052] 10 Outer ring
[0053] 20 Inner Circle
[0054] 30 Skeleton
[0055] 31 Skeleton axial section
[0056] 32 radial section of skeleton
[0057] 40 Elastic seal
[0058] 41 base
[0059] 42 Main sealing lip
[0060] 43 Auxiliary sealing lip
[0061] 50 Stop ring
[0062] 51 Stop ring axial section
[0063] 52 radial section of stop ring
[0064] 53 Pumping tank
[0065] 53a Clockwise pumping groove
[0066] 53b Counterclockwise pumping groove
[0067] 60 Spring
[0068] S1 First sealing side
[0069] S2 Second sealing side
[0070] C1 Clockwise
[0071] C2 Counterclockwise
Claims
1. A sealing device, characterized in that: include: A skeleton (30) which is annular and arranged around a rotation axis; an elastic sealing body (40) which is annular, coaxially fixed with the frame (30), and comprises a main sealing lip (42) extending radially inward; the elastic sealing body (40) is divided into a first sealing side (S1) and a second sealing side (S2) in the axial direction; as well as a stop ring (50) fixed on the frame (30); the stop ring (50) having a stop ring radial section (52) extending radially inward and not exceeding the main sealing lip (42); the stop ring (50) and the elastic sealing body (40) are arranged opposite to each other in the axial direction; Wherein, in the axial direction, at least one pumping groove (53) is provided on the side of the stop ring (50) away from the elastic sealing body (40); the pumping groove (53) extends from the radial inner edge of the stop ring (50) toward the radial outer side, and the circumferential dimension of the pumping groove (53) gradually decreases in the radial outward direction.
2. The sealing device according to claim 1, characterized in that: The pumping groove (53) extends from the radially inner edge of the stop ring (50) toward the radially outer side, and is inclined in a circumferential clockwise or counterclockwise direction.
3. The sealing device according to claim 2, characterized in that: The stop ring (50) is provided with a plurality of pumping grooves (53) evenly distributed along the circumferential direction, and the plurality of pumping grooves (53) are inclined in the same clockwise direction of the circumferential direction.
4. The sealing device according to claim 1, characterized in that: The stop ring (50) is provided with a plurality of pumping grooves (53), wherein a portion of the pumping grooves (53) extend from the radially inner edge of the stop ring (50) toward the radially outer side and are inclined in the circumferential clockwise direction; another portion of the pumping grooves (53) extend from the radially inner edge of the stop ring (50) toward the radially outer side and are inclined in the circumferential counterclockwise direction.
5. The sealing device according to claim 4, characterized in that: Two pumping grooves (53) inclined in the clockwise and counterclockwise directions of the circumference are arranged adjacent to each other as a pumping groove pair, and the stop ring (50) has a plurality of pumping groove pairs evenly distributed along the circumference.
6. The sealing device according to claim 1, characterized in that: The skeleton (30) comprises a skeleton axial section (31) and a skeleton radial section (32); the stop ring (50) comprises a stop ring axial section (51) and a stop ring radial section (52); the stop ring axial section (51) is fixed on the radial inner side surface of the skeleton axial section (31).
7. The sealing device according to claim 1, characterized in that: The elastic sealing body (40) further comprises an annular secondary sealing lip (43); in the axial direction, the primary sealing lip (42) is close to the first sealing side (S1), and the secondary sealing lip (43) is close to the second sealing side (S2).
8. The sealing device according to claim 1, characterized in that: The depth dimension of the pumping groove (53) in the axial direction gradually decreases in the radial outward direction.
9. The sealing device according to claim 1, characterized in that: The pumping groove (53) has a side wall (531) arranged along its edge, and an angle between the side wall (531) and the radial section (52) of the stop ring is greater than 90 degrees and less than 180 degrees.
10. A sealing assembly, comprising a sealing device according to any one of claims 1 to 9 and an element rotating relative to the sealing device, wherein the main sealing lip (42) contacts the circumferential surface of the element, and the element is a bearing inner ring, an end cover or a shaft.