U-shaped sealing ring structure with good sealing effect

Abstract

The utility model discloses a U-shaped sealing ring structure with a good sealing effect, which comprises a sealing ring outer layer, a sealing ring middle layer arranged on the inner side of the sealing ring outer layer, a high-strength carbon fiber layer, the sealing ring outer layer, the sealing ring middle layer, a sealing ring inner layer, a filling cavity and a lubricating layer, a sealing ring outer layer made of a high-wear-resistance fluororubber material, a sealing ring middle layer made of a shape memory rubber material and a sealing ring inner layer made of a medium-philic material are compounded together, and meanwhile a high-strength fiber layer made of a carbon fiber material is fixed between the sealing ring outer layer and the sealing ring middle layer. A filling cavity of the sealing ring middle layer is filled with gel, and the outer side of the sealing ring outer layer, the right end of the outer side of the sealing ring middle layer and the outer side of the sealing ring inner layer are each coated with a lubricating layer composed of a lubricating agent and nanoparticles, so that the abrasion resistance, the deformation recovery capacity and the sealing performance of the device are enhanced, and the tear resistance and the fatigue resistance of the device are better; therefore, the sealing effect of the device is better, and the service life of the device is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of sealing ring technology, and in particular to a U-shaped sealing ring structure with good sealing effect. Background Technology

[0002] Traditional U-shaped seals used on the outside of drive shafts often employ a single rubber material or a simple rubber-metal combination. However, these traditional seals are prone to wear and tear in practical use, affecting their sealing performance. Furthermore, from a stress perspective, drive shafts generate complex stresses during operation, including centrifugal force from high-speed rotation, alternating stress from equipment vibration, and axial and radial forces that may occur under different operating conditions. Due to structural and material limitations, ordinary U-shaped seals cannot effectively disperse these stresses, easily leading to stress concentration. In areas of stress concentration, the seals are highly susceptible to cracking, breakage, and deformation, thus affecting the sealing effect and shortening their service life. For example, in heavy machinery, the high load operation of the drive shaft subjects traditional seals to enormous stress, often resulting in damage within a short period and requiring frequent replacement. This not only increases maintenance costs but also severely impacts equipment efficiency. Therefore, to address these issues, a U-shaped seal structure with superior sealing performance is proposed. Utility Model Content

[0003] The technical problem to be solved by this utility model overcomes the existing defects and can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A U-shaped sealing ring structure with good sealing effect includes an outer sealing ring layer, a middle sealing ring layer inside the outer sealing ring layer, and an inner sealing ring layer inside the middle sealing ring layer. Memory metal wires are fixedly connected to the inner sides of both the outer and inner sealing ring layers. A lubricating layer composed of lubricant and nanoparticles is attached to the outer side of the outer sealing ring layer, the right end of the outer side of the middle sealing ring layer, and the outer side of the inner sealing ring layer. An annular auxiliary sealing ring contacts the right end of the outer side of the outer sealing ring layer. High-strength fiber layers are fixedly connected between the outer and middle sealing ring layers and between the middle and inner sealing ring layers.

[0006] As a further improvement of this utility model, the outer layer of the sealing ring is made of highly wear-resistant fluororubber, the middle layer of the sealing ring is made of shape memory rubber, and the inner layer of the sealing ring is made of media-friendly nitrile rubber, EPDM rubber, PTFE or silicone rubber. The inner side of the inner layer of the sealing ring is wavy.

[0007] As a further improvement of this utility model, the outer layer, middle layer and inner layer of the sealing ring are tightly bonded together by a hot vulcanization process.

[0008] As a further improvement of this utility model, the middle layer of the sealing ring has an annular filling cavity, and the inner side of the filling cavity is filled with gel.

[0009] As a further improvement of this utility model, the high-strength fiber layer is arranged in a ring shape, and the high-strength fiber layer is made of carbon fiber.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. A U-shaped sealing ring structure with good sealing effect, comprising a high-strength carbon fiber layer, an outer sealing ring layer, a middle sealing ring layer, an inner sealing ring layer, a filling cavity, and a lubricating layer. The outer sealing ring layer is made of high-wear-resistant fluororubber, the middle sealing ring layer is made of shape memory rubber, and the inner sealing ring layer is made of a media-friendly material. A high-strength carbon fiber layer is fixed between each of the three layers. The filling cavity of the middle sealing ring layer is filled with gel, and a lubricating layer composed of lubricant and nanoparticles is applied to the outer side of the outer sealing ring layer, the right end of the outer side of the middle sealing ring layer, and the outer side of the inner sealing ring layer. This enhances the device's wear resistance, deformation recovery ability, and sealing performance, resulting in better tear resistance and fatigue resistance, thus improving the sealing effect and ensuring the device's service life. Attached Figure Description

[0012] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0013] Figure 1 This is a schematic diagram of the overall structure of a U-shaped sealing ring with good sealing effect according to this utility model.

[0014] Figure 2 This is a cross-sectional view of a U-shaped sealing ring structure with good sealing effect according to the present invention.

[0015] In the diagram: 1. Outer layer of the sealing ring; 2. Middle layer of the sealing ring; 3. Inner layer of the sealing ring; 4. Memory metal wire; 5. Lubricating layer; 6. Auxiliary sealing ring; 7. Filling cavity; 8. High-strength fiber layer. Detailed Implementation

[0016] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. In order to better illustrate the specific embodiments of the present invention, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size. It is understandable for those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Example 1

[0018] like Figure 1-2 As shown, a U-shaped sealing ring structure with good sealing effect includes an outer sealing ring layer 1, a middle sealing ring layer 2 inside the outer sealing ring layer 1, and an inner sealing ring layer 3 inside the middle sealing ring layer 2. Memory metal wires 4 are fixedly connected to the inner sides of both the outer sealing ring layer 1 and the inner sealing ring layer 3. A lubricating layer 5 composed of lubricant and nanoparticles is attached to the outer side of the outer sealing ring layer 1, the right outer end of the middle sealing ring layer 2, and the outer side of the inner sealing ring layer 3. An annular auxiliary sealing ring 6 contacts the right outer end of the outer sealing ring layer 1. High-strength fiber layers 8 are fixedly connected between the outer sealing ring layer 1 and the middle sealing ring layer 2, and between the middle sealing ring layer 2 and the inner sealing ring layer 3.

[0019] Example 2

[0020] like Figure 1-2 As shown, to address the issues of poor wear resistance, deformation recovery, and sealing performance of the device, the outer layer 1 of the sealing ring is made of highly wear-resistant fluororubber, the middle layer 2 is made of shape memory rubber, and the inner layer 3 is made of media-friendly nitrile rubber, EPDM rubber, PTFE, or silicone rubber. The inner side of the inner layer 3 is wavy. By combining the highly wear-resistant fluororubber outer layer 1, the shape memory rubber middle layer 2, and the media-friendly inner layer 3, and then wavy the inner side of the inner layer 3, the contact area with the sealing surface is further increased, resulting in better wear resistance, deformation recovery, and sealing performance of the device.

[0021] Example 3

[0022] like Figure 1-2 As shown, in order to solve the problem of poor device strength, the outer layer 1, the middle layer 2, and the inner layer 3 of the sealing ring are tightly bonded together by a hot vulcanization process. The hot vulcanization process tightly bonds the outer layer 1, the middle layer 2, and the inner layer 3 of the sealing ring together, thereby improving the strength of the device.

[0023] Example 4

[0024] like Figure 2 As shown, in order to solve the problem of unstable sealing pressure of the device, an annular filling cavity 7 is provided in the middle of the middle layer 2 of the sealing ring, and the inner side of the filling cavity 7 is filled with gel. By opening an annular filling cavity 7 in the middle of the middle layer 2 of the sealing ring, and then filling the inner side of the filling cavity 7 with gel, when the external pressure changes, the gel in the filling cavity 7 expands or contracts accordingly, automatically adjusting the compression of the device, so that the device can maintain a stable sealing pressure.

[0025] Example 5

[0026] like Figure 2 As shown, in order to solve the problem of poor fatigue and tear resistance of the device, the high-strength fiber layer 8 is arranged in a ring shape and is made of carbon fiber. By setting the high-strength fiber layer 8 of carbon fiber between the outer layer 1, the middle layer 2 and the inner layer 3 of the sealing ring, the fatigue and tear resistance of the device is improved.

[0027] In this embodiment, when the device is used, the auxiliary sealing ring 6 on the outer right lip of the outer layer 1 of the sealing ring can act as the first line of defense to block most of the external dust and impurities, thereby enhancing the sealing performance of the device. Then, in conjunction with the composite of the outer layer 1 of the sealing ring made of high wear-resistant fluororubber, the middle layer 2 of the sealing ring made of shape memory rubber, and the inner layer 3 of the sealing ring made of media-friendly material, and with the memory metal wire 4 fixedly installed inside the outer layer 1 and the inner layer 3 of the sealing ring, and the wavy arrangement on the inner side of the inner layer 3 of the sealing ring, a layer of lubricant and nanoparticles are applied to the outer side of the outer layer 1, the outer right end of the middle layer 2 of the sealing ring, and the outer side of the inner layer 3 of the sealing ring. The addition of the lubricating layer 5 improves the device's wear resistance, deformation recovery, and sealing performance. Because a high-strength carbon fiber layer 8 is fixed between the outer layer 1, the middle layer 2, and the inner layer 3 of the sealing ring, the device exhibits better tear resistance and fatigue resistance when positioned on the outside of the drive shaft. Furthermore, the filling cavity 7 of the middle layer 2 is filled with gel. When external pressure changes, the gel in the filling cavity 7 expands or contracts accordingly, automatically adjusting the device's compression and maintaining a stable sealing pressure. This allows the device to adapt to different working pressure environments, resulting in a better sealing effect.

[0028] The above are preferred embodiments of the present invention. The basic principles, main features, and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope thereof. All such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A U-shaped sealing ring structure with good sealing effect, comprising an outer layer (1) of the sealing ring, characterized in that: The outer layer (1) of the sealing ring is provided with a middle layer (2) of the sealing ring, and the middle layer (2) of the sealing ring is provided with an inner layer (3) of the sealing ring. The inner side of the outer layer (1) and the inner side of the inner layer (3) of the sealing ring are fixedly connected with memory metal wires (4). The outer side of the outer layer (1), the right end of the outer side of the middle layer (2) of the sealing ring, and the outer side of the inner layer (3) of the sealing ring are all attached with a lubricating layer (5) composed of lubricant and nanoparticles. The right end of the outer side of the outer layer (1) of the sealing ring is in contact with an annular auxiliary sealing ring (6). The outer layer (1) of the sealing ring and the middle layer (2) of the sealing ring and the middle layer (2) of the sealing ring are fixedly connected with a high-strength fiber layer (8).

2. The U-shaped sealing ring structure with good sealing effect according to claim 1, characterized in that: The outer layer (1) of the sealing ring is made of highly wear-resistant fluororubber, the middle layer (2) of the sealing ring is made of shape memory rubber, and the inner layer (3) of the sealing ring is made of media-friendly nitrile rubber, EPDM rubber, polytetrafluoroethylene or silicone rubber. The inner side of the inner layer (3) of the sealing ring is wavy.

3. The U-shaped sealing ring structure with good sealing effect according to claim 1, characterized in that: The outer layer (1), middle layer (2), and inner layer (3) of the sealing ring are tightly bonded together by a hot vulcanization process.

4. The U-shaped sealing ring structure with good sealing effect according to claim 1, characterized in that: The sealing ring has a ring-shaped filling cavity (7) in the middle of the middle layer (2), and the filling cavity (7) is filled with gel.

5. The U-shaped sealing ring structure with good sealing effect according to claim 1, characterized in that: The high-strength fiber layer (8) is arranged in a ring shape, and the high-strength fiber layer (8) is made of carbon fiber.

Images