Bilateral sealing oil seal

Abstract

The utility model belongs to the technical field of oil seals, and discloses a double-side sealing oil seal which comprises an annular framework, two sealing rings and an oil return line. The two sealing rings can seal different media on the two sides of the rotating shaft at the same time, and mixing or leakage of the media is prevented. The oil return lines coaxial with the sealing rings are arranged on the faces, abutting against the rotating shaft, of the two sealing rings, so that the sealing device can adapt to different rotating directions of the rotating shaft, and the sealing effect can be guaranteed no matter which direction the rotating shaft rotates. The sealing body wraps the outer side of the annular supporting body, so that additional sealing and protection are provided for the oil seal; therefore, the double-side sealing oil seal not only can achieve efficient sealing of media on the two sides of the rotating shaft, but also can adapt to complex working conditions in different rotating directions, and has remarkable advantages in the aspects of prolonging the service life, improving the running reliability of equipment and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of oil seals, in particular to a double-sided sealed oil seal. Background Art

[0002] An oil seal is a commonly used sealing element for sealing grease or liquid in mechanical equipment. Its main function is to prevent liquid (such as lubricating oil) from leaking from the rotating shaft or other moving parts of the mechanical device, and at the same time prevent external dust, dirt or moisture from entering the equipment, so as to protect the normal operation of the machine and extend its service life.

[0003] The traditional oil seal structure can only seal the medium on one side, and has certain requirements for the rotation direction of the rotating shaft, and it can no longer be applied to high-speed working conditions. However, in many practical applications, the equipment may need to seal different media from two directions at the same time, and the rotating shaft may also rotate in different directions. In the face of such complex working conditions, the traditional oil seal is difficult to meet the sealing requirements. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a double-sided sealed oil seal, which can adapt to complex working conditions, can not only realize the sealing of the oil seal for the double-sided medium, but also meet the different rotation directions of the rotating shaft.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A double-sided sealed oil seal for sealing a rotating shaft, which includes:

[0007] An annular skeleton, the annular skeleton includes an annular support body and a sealing body, and the sealing body is configured to cover the annular support body;

[0008] Two sealing rings, the two sealing rings are symmetrically arranged on both sides of the annular skeleton, and the outer ring of each sealing ring is connected to the sealing body; the inner ring of the sealing ring protrudes from the inner ring of the annular skeleton and can offset to both sides of the annular skeleton so as to be able to abut and seal the rotating shaft inserted into the annular skeleton;

[0009] Oil return lines, the oil return lines are arranged on the surfaces of the two sealing rings in contact with the rotating shaft, and the oil return lines are coaxially arranged with the sealing rings.

[0010] Further, the cross-section of the two sealing rings in contact with the rotating shaft is in an eight-character shape.

[0011] Further, the sealing ring is made of a flexible material.

[0012] Further, a plurality of oil return lines are provided, and the plurality of oil return lines are arranged at intervals from the outer ring to the inner ring of the sealing ring.

[0013] Further, the annular support body includes two support portions symmetrically arranged back to back, the sealing body includes two sealing portions symmetrically arranged, the two sealing portions are respectively configured to conformally cover the two support portions, the two sealing portions are detachably connected, and the outer rings of the two sealing rings are respectively connected to the two sealing portions.

[0014] Further, the cross-section of the support portion is L-shaped.

[0015] Further, an extraction hole is formed in each support portion, the extraction hole is located between the inner ring of the sealing ring and the outer ring of the support portion, and the extraction hole axially penetrates the sealing portion along the annular skeleton.

[0016] Further, a plurality of extraction holes are provided, and the extraction holes are arranged at intervals along the circumferential direction of the support portion.

[0017] Further, a static sealing protrusion is provided on the side of the sealing portion facing away from the outer ring of the support portion, and the static sealing protrusion is annularly arranged on the sealing portion.

[0018] Further, a plurality of static sealing protrusions are provided, and the plurality of static sealing protrusions are arranged at intervals along the axial direction of the annular skeleton.

[0019] Advantages of the present utility model:

[0020] The present utility model provides a double-sided sealed oil seal, including an annular skeleton, two sealing rings and an oil return line; by symmetrically arranging the two sealing rings on both sides of the annular skeleton, the inner rings of the sealing rings protrude from the inner ring of the annular skeleton and can offset to both sides of the annular skeleton. Such a design can seal different media on both sides of the rotating shaft at the same time. This double-sided sealing function ensures that no matter which side the medium comes from, it can be effectively sealed, thereby preventing the mixing or leakage of the medium; by arranging an oil return line coaxial with the sealing ring on the side where each of the two sealing rings abuts against the rotating shaft, this design enables the oil seal to adapt to different rotating directions of the rotating shaft, ensuring that the sealing effect can be guaranteed no matter which direction the rotating shaft rotates; by covering the sealing body on the outside of the annular support body, it not only provides additional sealing and protection for the oil seal, but also has good elasticity and buffering ability, can absorb vibration and impact, and reduce the wear on the oil seal. Therefore, this double-sided sealed oil seal can not only achieve efficient sealing of the media on both sides of the rotating shaft, but also adapt to complex working conditions under different rotating directions, showing significant advantages in extending the service life and improving the operation reliability of the equipment. Description of the Drawings

[0021] Figure 1 is a schematic structural view of the double-sided sealed oil seal of the present utility model;

[0022] Figure 2 is a sectional view of the double-sided sealed oil seal of the present utility model.

[0023] In the figure:

[0024] 1. Ring-shaped skeleton; 11. Support part; 12. Sealing part; 2. Sealing ring; 3. Oil return line; 4. Removal hole; 5. Static sealing protrusion. Specific embodiments

[0025] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only the parts related to the present utility model rather than all the structures are shown in the accompanying drawings.

[0026] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above and over", and "on the top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below and under", and "under the bottom of" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0028] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", "right", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0029] Please refer to Figure 1 - Figure 2 As shown, the present utility model provides a double-sided sealed oil seal, which can adapt to complex working conditions, can not only seal the double-sided media by the oil seal, but also meet the different rotation directions of the rotating shaft. The double-sided sealed oil seal is used for sealing the rotating shaft, and includes an annular skeleton 1, two sealing rings 2 and an oil return line 3. The annular skeleton 1 includes an annular support body and a sealing body, and the sealing body is configured to cover the annular support body; the two sealing rings 2 are symmetrically arranged on both sides of the annular skeleton 1, and the outer ring of each sealing ring 2 is connected to the sealing body; the inner ring of the sealing ring 2 protrudes from the inner ring of the annular skeleton 1 and can offset toward both sides of the annular skeleton 1 so as to be able to abut against and seal the rotating shaft inserted into the annular skeleton 1; oil return lines 3 are arranged on the surfaces of the two sealing rings 2 in contact with the rotating shaft, and the oil return lines 3 are coaxially arranged with the sealing rings 2.

[0030] By symmetrically arranging the two sealing rings 2 on both sides of the annular skeleton 1, and the inner ring of the sealing ring 2 protruding from the inner ring of the annular skeleton 1 and being able to offset toward both sides of the annular skeleton 1, such a design can seal different media on both sides of the rotating shaft at the same time. This double-sided sealing function ensures that no matter which side the medium comes from, it can be effectively sealed, thus preventing the mixing or leakage of the medium; by arranging oil return lines 3 coaxial with the sealing rings 2 on the surfaces of the two sealing rings 2 in contact with the rotating shaft, such a design enables the oil seal to adapt to different rotation directions of the rotating shaft, ensuring that the sealing effect can be guaranteed no matter which direction the rotating shaft rotates; by covering the sealing body outside the annular support body, it not only provides additional sealing and protection for the oil seal, but also has good elasticity and buffering ability, can absorb vibration and shock, and reduce the wear on the oil seal. Therefore, this double-sided sealed oil seal can not only achieve efficient sealing of the media on both sides of the rotating shaft, but also adapt to complex working conditions under different rotation directions, showing significant advantages in extending the service life, improving the operation reliability of the equipment, etc.

[0031] As Figure 2 shown, in order to improve the sealing performance of the double-sided sealed oil seal, in some embodiments, the cross-section of the two sealing rings 2 in contact with the rotating shaft is in a shape of an eight-character. Such a design increases the contact area between the sealing ring 2 and the rotating shaft, thereby enhancing the sealing effect, further effectively preventing liquid leakage. At the same time, this design can evenly distribute the stress on the sealing ring 2, reduce local wear, and extend the service life of the sealing ring 2. Further, the sealing ring 2 is made of a flexible material, and the flexible material can closely fit the surface of the rotating shaft to fill in minute surface irregularities or unevenness, thereby achieving higher sealing performance; in addition, during the assembly process, the flexible material sealing ring 2 is not prone to lip turning due to excessive stretching or compression, thereby ensuring that the contact portion between the sealing ring 2 and the rotating shaft can maintain the correct direction and shape, and avoiding affecting the sealing performance. Among them, the flexible material of the sealing ring 2 can be but is not limited to PTFE material, etc., and no specific limitation is made here.

[0032] As Figure 1 shown, in order to improve the liquid return efficiency of the double-sided sealed oil seal, in some embodiments, a plurality of oil return lines 3 are provided. The plurality of oil return lines 3 are arranged at intervals from the outer ring to the inner ring of the sealing ring 2. By arranging the plurality of oil return lines 3 in a concentric circle arrangement from the outer ring to the inner ring of the sealing ring 2, the concentric circle arrangement of the plurality of oil return lines 3 can adapt to different rotation directions of the rotating shaft. Further, by arranging the plurality of oil return lines 3 at uniform intervals from the outer ring to the inner ring of the sealing ring 2, the liquid pressure in the sealing area can be effectively balanced, and the risk of seal failure caused by excessive pressure in a local area can be avoided. It should be noted that the oil return line 3 is a prior art, and the specific principle will not be elaborated here.

[0033] As Figure 2 shown, in order to facilitate the assembly of the double-sided sealed oil seal and the rotating shaft, in some embodiments, the annular support body includes two support portions 11 arranged symmetrically back to back, and the sealing body includes two sealing portions 12 arranged symmetrically. The two sealing portions 12 are respectively configured to conformally cover the two support portions 11. The two sealing portions 12 are connected to form a complete annular skeleton 1 through a detachable connection. The outer rings of the two sealing rings 2 are respectively connected to the two sealing portions 12. Such a design divides the double-sided sealed oil seal structure into two symmetric annular structures. The outer rings of the two sealing rings 2 are respectively connected to the sealing portions 12, allowing the installer to sequentially assemble the disassembled components onto the rotating shaft step by step, reducing the risk of damage to the sealing portion 12 during the assembly process. When a problem occurs in one sealing portion 12, the single-sided component can be replaced or repaired without disassembling the entire oil seal. At the same time, such two detachable and symmetric annular structures are not only convenient for processing during production but also beneficial to the preforming of the sealing ring 2. When preforming the sealing ring 2, multiple oil seals can be placed in the same direction and preformed at one time, which can significantly improve the efficiency of the preforming process, reduce the production time, and increase the production capacity of the production line. By conformally covering the support portion 11 with the sealing portion 12, the sealing portion 12 can better fit the support portion 11, effectively preventing the leakage of oil or other media and ensuring the integrity of the seal. In addition, the outer rings of the two sealing rings 2 are respectively connected to the two sealing portions 12. The larger the contact area between the connection part of the outer ring of the sealing ring 2 and the sealing portion 12, the more stable the connection between the two. Among them, the sealing portion 12 can be made of, but is not limited to, rubber material. If the sealing portion 12 is made of rubber material, then the connection between the sealing ring 2 and the sealing portion 12 can be, but is not limited to, by vulcanization.

[0034] Furthermore, the cross-section of the support portion 11 is L-shaped; this annular structure with an L-shaped cross-section can provide strong support, increase the stability of the support portion 11, effectively resist mechanical stress, and reduce the risk of structural deformation; in addition, the two sides of the L-shaped cross-section can be set to different lengths, and the long sides can be symmetrically arranged back to back, which is convenient for simplifying the alignment process and facilitating the operator's assembly; in the current embodiment, the inner ring of the annular frame 1 is formed on the side of the long side away from the short side.

[0035] As Figure 2 shown, in some embodiments, the cross-section of the support portion 11 is L-shaped. This annular structure with an L-shaped cross-section can provide strong support, increase the stability of the support portion 11, effectively resist mechanical stress, and reduce the risk of structural deformation; in addition, the two sides of the L-shaped cross-section can be set to different lengths, and the long sides can be symmetrically arranged back to back, which is convenient for simplifying the alignment process and facilitating the operator's assembly.

[0036] As Figure 1 shown, in some embodiments, an extraction hole 4 is formed on each support portion 11. The extraction hole 4 is located between the inner ring of the sealing ring 2 and the outer ring of the support portion 11. The extraction hole 4 axially penetrates the sealing portion 12 along the annular frame 1. When the sealing ring 2 needs to be replaced or repaired, the operator can pry the extraction hole 4 with a tool to easily remove the sealing portion 12 and the sealing ring 2 from the support portion 11, reducing the difficulty in the disassembly process. Further, a plurality of extraction holes 4 are provided, and the extraction holes 4 are circumferentially spaced along the support portion 11. The circumferentially spaced extraction holes 4 provide multiple extraction points, enabling the operator to select the most convenient position for operation and improving the flexibility of assembly and maintenance.

[0037] As Figure 1 shown, in order to prevent the oil seal from shifting, in some embodiments, a static seal protrusion 5 is provided on the side of the sealing portion 12 facing away from the outer ring of the support portion 11. The static seal protrusion 5 is provided around the sealing portion 12. The static seal protrusion 5 is in interference fit with the external device. The static seal protrusion 5 provides frictional force, effectively preventing the oil seal from shifting due to pressure, vibration or other factors during use, thereby keeping the sealing portion 12 in the correct position; on the other hand, the static seal protrusion 5 also realizes the static seal between the oil seal and the external device, improving the sealing performance of the oil seal. Further, a plurality of static seal protrusions 5 are provided, and the plurality of static seal protrusions 5 are axially spaced along the annular frame 1, which can provide a uniform sealing pressure in the entire area where the sealing portion 12 contacts the external device, and more effectively prevent the leakage of oil or other media.

[0038] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. Double-sided sealing oil seal, used for sealing rotating shaft, characterized by: include: An annular skeleton (1), the annular skeleton (1) comprising an annular support body and a sealing body, the sealing body being configured to cover the annular support body; Two sealing rings (2), the two sealing rings (2) are symmetrically arranged on two side surfaces of the annular frame (1), the outer ring of each sealing ring (2) being connected to the sealing body; the inner ring of the sealing ring (2) protrudes from the inner ring of the annular frame (1) and can be offset to two sides of the annular frame (1) so as to abut against and seal the rotating shaft plugged into the annular frame (1); An oil return line (3) is provided on one side of the two sealing rings (2) that abut against the rotating shaft, and the oil return line (3) is coaxially arranged with the sealing ring (2).

2. The double-sided sealing oil seal according to claim 1, characterized in that: The cross section of the two sealing rings (2) when in contact with the rotating shaft is in an eight-shaped shape.

3. The double-sided sealing oil seal according to claim 2, characterized in that: The sealing ring (2) is made of flexible material.

4. The double-sided sealing oil seal according to claim 1, characterized in that: A plurality of the oil return lines (3) are provided, and the plurality of the oil return lines (3) are arranged at intervals from the outer ring of the sealing ring (2) to the inner ring of the sealing ring (2).

5. The double-sided sealing oil seal according to any one of claims 1 to 4, characterized in that: The annular support body comprises two support parts (11) symmetrically arranged back to back, and the sealing body comprises two sealing parts (12) symmetrically arranged, the two sealing parts (12) are respectively configured to conformally cover the two support parts (11), the two sealing parts (12) are detachably connected, and the outer rings of the two sealing rings (2) are respectively connected to the two sealing parts (12).

6. The double-sided sealing oil seal according to claim 5, characterized in that: The cross section of the support portion (11) is L-shaped.

7. The double-sided sealing oil seal according to claim 5, characterized in that: A take-out hole (4) is provided on each of the support parts (11); the take-out hole (4) is located between the inner ring of the sealing ring (2) and the outer ring of the support part (11); and the take-out hole (4) penetrates the sealing part (12) along the axial direction of the annular skeleton (1).

8. The double-sided sealing oil seal according to claim 7, characterized in that: A plurality of the extraction holes (4) are provided, and the extraction holes (4) are arranged at intervals along the circumference of the support portion (11).

9. The double-sided sealing oil seal according to claim 5, characterized in that: A static sealing protrusion (5) is provided on the side of the sealing portion (12) facing away from the outer ring of the supporting portion (11), and the static sealing protrusion (5) is arranged in an annular manner on the sealing portion (12).

10. The double-sided sealing oil seal according to claim 9, characterized in that: A plurality of the static sealing protrusions (5) are provided, and the plurality of static sealing protrusions (5) are arranged at intervals along the axial direction of the annular skeleton (1).

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