One-way oil seal suitable for high-speed rotating shaft

Abstract

The utility model discloses a one-way oil seal suitable for a high-speed rotating shaft, and relates to the technical field of oil seals of rotating shaft products, the one-way oil seal comprises an oil seal framework, outer diameter sealing rubber and inner diameter sealing rubber, the oil seal framework is embedded in the outer diameter sealing rubber, the inner diameter sealing rubber is integrally formed at an inner ring of the outer diameter sealing rubber, and the oil seal framework is embedded in the inner ring of the outer diameter sealing rubber. A plurality of elastic pieces which are arranged at intervals are embedded in an outer ring of the inner diameter sealing rubber, sealing lips are formed at the top and the bottom of an inner ring of the inner diameter sealing rubber, a plurality of sealing rings which are distributed at intervals from top to bottom are arranged on the inner ring of the inner diameter sealing rubber, and wear-resistant coatings are arranged on the surfaces of the sealing rings and the surfaces of the sealing lips. By optimizing the design and adopting the high-performance wear-resistant coating, the sealing effect and the durability are effectively improved, and the leakage risk of lubricating oil is reduced, so that the service life is remarkably prolonged, and the high-speed wear-resistant sealing ring is particularly suitable for a high-speed rotating shaft environment.

Description

Technical Field

[0001] This utility model relates to the field of oil seal technology for rotating shaft products, and in particular to a one-way oil seal suitable for high-speed rotating shafts. Background Technology

[0002] A one-way oil seal is an important sealing component used to prevent the leakage of oil or gas. Its main characteristic is that it seals in only one direction. The outer ring of the one-way oil seal mates with the shaft seat, and the inner ring mates with the shaft. The mating parts of the inner ring and the shaft fit tightly together, thus preventing liquid or gas leakage. One-way oil seals are commonly found in mechanical equipment such as bearings, speed reducers, and transmission mechanisms.

[0003] Traditional one-way oil seals are mostly connected to the shaft through the elastic material of the oil seal itself. During the high-speed operation of the shaft, the connection between the one-way oil seal and the shaft is prone to loosening, or the shaft under high-speed operation will cause great wear on the one-way oil seal, resulting in lubricating oil leakage, which will increase the friction of the bearing during rotation and affect its service life. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a one-way oil seal suitable for high-speed rotating shafts.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A one-way oil seal suitable for high-speed rotating shafts includes an oil seal skeleton, an outer diameter sealing rubber, and an inner diameter sealing rubber. The oil seal skeleton is embedded inside the outer diameter sealing rubber. The inner diameter sealing rubber is integrally formed at the inner ring of the outer diameter sealing rubber. The outer ring of the inner diameter sealing rubber is embedded with a plurality of spaced elastic elements. Sealing lips are formed at the top and bottom of the inner ring of the inner diameter sealing rubber. The inner ring of the inner diameter sealing rubber is provided with a plurality of sealing rings spaced from top to bottom. The surfaces of the sealing rings and sealing lips are all provided with a wear-resistant coating.

[0007] Preferably, a groove is formed between the outer diameter sealing rubber and the inner diameter sealing rubber, and the inner diameter of the groove is adapted to the bearing.

[0008] Preferably, the outer ring of the inner diameter sealing rubber has a receiving cavity, the elastic element is located in the receiving cavity, and a sealing strip is fixedly connected to the outer side of the elastic element, the sealing strip being located in the groove.

[0009] Preferably, the side of the sealing strip away from the elastic element is serrated.

[0010] Preferably, the sealing lip includes a lip edge integrally formed with the inner diameter sealing rubber, the inner diameter sealing rubber having a deformable cavity for accommodating the lip edge, and the lip edge having a groove on the side facing the inner ring of the inner diameter sealing rubber, the number of the grooves being at least two.

[0011] Preferably, the sealing ring has an annular structure and a "V" shaped cross-section, and the sealing ring can undergo elastic deformation after contacting the rotating shaft.

[0012] Preferably, the wear-resistant coating includes a fluororubber coating, an acrylic coating, and a metal oxide coating. The fluororubber coating is sprayed onto the surface of the lip and the sealing ring, the acrylic coating is sprayed onto the surface of the fluororubber coating, and the metal oxide coating is sprayed onto the surface of the acrylic coating.

[0013] Preferably, both the outer diameter sealing rubber and the inner diameter sealing rubber are polyurethane elastomers.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0015] 1. In this utility model, during installation, its lip and sealing ring fit tightly against the rotating shaft through elastic deformation, effectively enhancing the sealing performance with the rotating shaft and significantly reducing lubricating oil leakage. At the same time, the sealing strip adopts a serrated design, which, together with the elastic element for reinforcement and fixation, further enhances the sealing effect with the bearing, effectively improving the sealing effect, reducing the risk of lubricating oil leakage, and thus significantly extending the service life of the equipment.

[0016] 2. In this utility model, the wear-resistant coating on the surface of the oil seal is composed of fluororubber, acrylate and metal oxide. These materials give the oil seal excellent high temperature resistance, chemical corrosion resistance, aging resistance and wear resistance. The metal oxide coating provides a hard and high temperature resistant protective layer, enabling it to adapt to the use requirements of high-speed shafts under extreme working conditions. Attached Figure Description

[0017] Figure 1 A three-dimensional structural diagram of a one-way oil seal suitable for high-speed rotating shafts is provided for this utility model.

[0018] Figure 2 This utility model provides a partial cross-sectional three-dimensional structural schematic diagram of a one-way oil seal suitable for high-speed rotating shafts;

[0019] Figure 3 This invention proposes a one-way oil seal suitable for high-speed rotating shafts. Figure 2 Enlarged structural diagram at point A in the middle;

[0020] Figure 4This utility model presents a partial cross-sectional view of the inner diameter sealing rubber structure of a one-way oil seal suitable for high-speed rotating shafts.

[0021] Legend: 1. Oil seal skeleton; 2. Outer diameter sealing rubber; 3. Inner diameter sealing rubber; 4. Elastic element; 5. Sealing lip; 51. Lip edge; 52. Deformation cavity; 53. Groove; 6. Sealing ring; 7. Wear-resistant coating; 8. Slot; 9. Receiving cavity; 10. Sealing strip. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0024] like Figure 1-4 As shown, this utility model provides a one-way oil seal suitable for high-speed rotating shafts, including an oil seal skeleton 1, an outer diameter sealing rubber 2, and an inner diameter sealing rubber 3. The oil seal skeleton 1 is embedded in the interior of the outer diameter sealing rubber 2. The inner diameter sealing rubber 3 is integrally formed and disposed in the inner ring of the outer diameter sealing rubber 2. The outer ring of the inner diameter sealing rubber 3 is embedded with a number of spaced elastic elements 4. Sealing lips 5 are formed at the top and bottom of the inner ring of the inner diameter sealing rubber 3. The inner ring of the inner diameter sealing rubber 3 is provided with a number of sealing rings 6 distributed from top to bottom. The surfaces of the sealing rings 6 and the sealing lips 5 are all provided with a wear-resistant coating 7.

[0025] In this embodiment, a groove 8 is formed between the outer diameter sealing rubber 2 and the inner diameter sealing rubber 3. The inner diameter of the groove 8 is adapted to the bearing. A receiving cavity 9 is provided on the outer ring of the inner diameter sealing rubber 3. The elastic element 4 is located in the receiving cavity 9. A sealing strip 10 is fixedly connected to the outer side of the elastic element 4. The sealing strip 10 is located in the groove 8. The side of the sealing strip 10 away from the elastic element 4 is set as a serrated shape. The elastic element 4 applies pressure to the sealing strip 10 and the inner diameter sealing rubber 3 to enhance the sealing effect between the inner diameter sealing rubber 3 and the rotating shaft. When the elastic element 4 applies pressure to the sealing strip 10, the serrated sealing strip 10 contacts the bearing to enhance the sealing effect between the inner diameter sealing rubber 3 and the bearing.

[0026] In this embodiment, the sealing lip 5 includes a lip edge 51 integrally formed with the inner diameter sealing rubber 3. The inner diameter sealing rubber 3 has a deformation cavity 52 for accommodating the lip edge 51. The side of the lip edge 51 facing the inner ring of the inner diameter sealing rubber 3 has a groove 53. The number of grooves 53 is at least two. During installation, the lip edge 51 is squeezed and undergoes elastic deformation, bending towards the deformation cavity 52. ​​The lip edge 51 contacts the rotating shaft, increasing the sealing performance between it and the rotating shaft. The deformation cavity 52 and the groove 53 can prevent the lip edge 51 from breaking.

[0027] In this embodiment, the sealing ring 6 is an annular structure with a "V" shaped cross-section. The sealing ring 6 can undergo elastic deformation after contacting the rotating shaft. During installation, the sealing ring 6 is compressed and undergoes elastic deformation. The "V" shaped sealing ring 6 opens and contacts the rotating shaft, increasing the sealing performance between the sealing ring and the rotating shaft.

[0028] In this embodiment, the wear-resistant coating 7 includes a fluororubber coating, an acrylic coating, and a metal oxide coating. The fluororubber coating is sprayed on the surface of the lip 51 and the sealing ring 6. The acrylic coating is sprayed on the surface of the fluororubber coating, and the metal oxide coating is sprayed on the surface of the acrylic coating. The fluororubber coating has excellent high-temperature resistance, chemical corrosion resistance, and aging resistance, making it a preferred high-temperature sealing material. The acrylic coating has excellent weather resistance, chemical corrosion resistance, and wear resistance, but its high-temperature resistance may be slightly inferior to that of silicone rubber and fluororubber. In this case, a metal oxide coating is sprayed on its surface to form a hard protective layer with better high-temperature resistance, making it suitable for rubber protection in high-temperature environments.

[0029] In this embodiment, both the outer diameter sealing rubber 2 and the inner diameter sealing rubber 3 are polyurethane elastomers, which give the outer diameter sealing rubber 2 and the inner diameter sealing rubber 3 excellent wear resistance. Compared with natural rubber, their wear resistance can be improved by 2 to 10 times.

[0030] How to use and how to work this device:

[0031] When the one-way oil seal is fitted into the shaft, during installation, both the lip 51 and the sealing ring 6 are compressed and undergo elastic deformation. The elastic element 4 applies pressure to the sealing strip 10 and the inner diameter sealing rubber 3. The inner diameter sealing rubber 3 transmits the pressure to the lip 51 and the sealing ring 6. The lip 51 bends towards the deformation cavity 52 and contacts the shaft. The sealing ring 6, with a "V" shaped cross-section, opens and contacts the shaft, increasing the sealing performance between the seal and the shaft, making the connection between the seal and the shaft tighter and reducing lubricating oil leakage. When the bearing inner ring is installed in the groove 8, the elastic element 4 applies pressure to the sealing strip 10 for reinforcement and fixation, causing the serrated sealing strip 10 to contact the bearing, thereby strengthening the sealing effect between the seal and the bearing and reducing lubricating oil leakage. By increasing the tightness of the connection between the one-way oil seal and the shaft, the possibility of lubricating oil leakage is reduced, thus improving the service life.

[0032] Meanwhile, both the sealing ring 6 and the sealing lip 5 are provided with a wear-resistant coating 7 composed of a fluororubber coating, an acrylic coating, and a metal oxide coating. The fluororubber coating and the acrylic coating give it excellent high-temperature resistance, chemical corrosion resistance, aging resistance, weather resistance, and wear resistance. However, the high-temperature resistance of the acrylic coating may be slightly inferior to that of silicone rubber and fluororubber. Therefore, a metal oxide coating is sprayed on its surface to form a hard protective layer with better high-temperature resistance. This is suitable for rubber protection in high-temperature environments, improving wear resistance and high-temperature resistance to adapt to the use of high-speed rotating shafts, and increasing service life by reducing wear.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A one-way oil seal suitable for high-speed rotating shafts, characterized in that: The device includes an oil seal skeleton (1), an outer diameter sealing rubber (2), and an inner diameter sealing rubber (3). The oil seal skeleton (1) is embedded inside the outer diameter sealing rubber (2). The inner diameter sealing rubber (3) is integrally formed and disposed on the inner ring of the outer diameter sealing rubber (2). The outer ring of the inner diameter sealing rubber (3) is embedded with a number of spaced elastic elements (4). The top and bottom of the inner ring of the inner diameter sealing rubber (3) are both formed with sealing lips (5). The inner ring of the inner diameter sealing rubber (3) is provided with a number of sealing rings (6) spaced from top to bottom. The surfaces of the sealing rings (6) and the sealing lips (5) are both provided with a wear-resistant coating (7).

2. The one-way oil seal suitable for high-speed rotating shafts according to claim 1, characterized in that: A groove (8) is formed between the outer diameter sealing rubber (2) and the inner diameter sealing rubber (3), and the inner diameter of the groove (8) is adapted to the bearing.

3. A one-way oil seal suitable for high-speed rotating shafts according to claim 2, characterized in that: The inner diameter sealing rubber (3) has a receiving cavity (9) on its outer ring, the elastic element (4) is located in the receiving cavity (9), and a sealing strip (10) is fixedly connected to the outer side of the elastic element (4), the sealing strip (10) is located in the groove (8).

4. A one-way oil seal suitable for high-speed rotating shafts according to claim 3, characterized in that: The sealing strip (10) is serrated on the side away from the elastic member (4).

5. A one-way oil seal suitable for high-speed rotating shafts according to claim 1, characterized in that: The sealing lip (5) includes a lip edge (51) integrally formed with the inner diameter sealing rubber (3). The inner diameter sealing rubber (3) has a deformation cavity (52) for accommodating the lip edge (51). The lip edge (51) has a groove (53) on the side facing the inner circle of the inner diameter sealing rubber (3). The number of grooves (53) is at least two.

6. A one-way oil seal suitable for high-speed rotating shafts according to claim 1, characterized in that: The sealing ring (6) has an annular structure and a "V" shaped cross section. The sealing ring (6) can undergo elastic deformation after contacting the rotating shaft.

7. A one-way oil seal suitable for high-speed rotating shafts according to claim 5, characterized in that: The wear-resistant coating (7) includes a fluororubber coating, an acrylic coating and a metal oxide coating. The fluororubber coating is sprayed on the surface of the lip (51) and the sealing ring (6). The acrylic coating is sprayed on the surface of the fluororubber coating and the metal oxide coating is sprayed on the surface of the acrylic coating.

8. A one-way oil seal suitable for high-speed rotating shafts according to claim 1, characterized in that: Both the outer diameter sealing rubber (2) and the inner diameter sealing rubber (3) are polyurethane elastomers.

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