High-pressure sealing rubber oil seal

Abstract

The utility model discloses a high-pressure sealing rubber oil seal, which relates to the technical field of rubber oil seals and comprises an oil seal main body, sealing clamping grooves are arranged on the edges of the upper end and the lower end of the oil seal main body, a movable air cavity is arranged inside the oil seal main body between the upper sealing clamping groove and the lower sealing clamping groove, and an air guide pipe is fixed inside the oil seal main body on the side edge of the movable air cavity in a penetrating mode. According to the combined type rubber oil seal, the sealing effect of the rubber oil seal is guaranteed through the combined type sealing design and the mode that rubber on the inner side of the movable air cavity and rubber on the inner side of the upper end and the inner side of the lower end are attached to the force exerting component in a sliding mode, and after abrasion, the rubber oil seal can be sealed through the air pressure increasing mode. According to the high-pressure sealing rubber oil seal, the rubber on the inner side of the movable air cavity is attached to the force output component, so that gaps caused by abrasion are avoided, the problem that the sealing performance of an existing high-pressure sealing rubber oil seal is easily reduced due to abrasion is solved, and the sealing effect of the rubber oil seal is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber oil seals, in particular to a high-pressure sealing rubber oil seal. Background Technique

[0002] An oil seal is the seal of lubricating oil. It is a mechanical component used to seal grease, isolating the components that need lubrication in the transmission components from the output components, so as to prevent the leakage of lubricating oil. An oil seal is required at any part where there is liquid lubricating oil in the rotating body box and is connected to the outside. Therefore, oil seals are widely used in various mechanical equipment.

[0003] However, in the prior art, when a rubber oil seal is in use, most of them are only attached to the internal component to be sleeved by means of socketing. However, in the long-term use process, due to the repeated contact and friction between the oil seal and the internal component, wear is likely to occur. After wear, the fitting degree decreases. In a high-pressure environment, it is impossible to ensure the seal on the inner side of the oil seal, resulting in a significant reduction in the sealing performance of the rubber oil seal. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problem in the prior art that the existing high-pressure sealing rubber oil seal is prone to reduced sealing performance due to wear, and to propose a high-pressure sealing rubber oil seal.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: It includes an oil seal main body. Sealing grooves are opened at the upper and lower edges of the oil seal main body. An active air chamber is opened inside the oil seal main body between the upper and lower sealing grooves. A gas guide pipe is fixedly penetrated inside the oil seal main body on the side of the active air chamber. An electric air valve is arranged on the gas guide pipe. One end of the gas guide pipe away from the oil seal main body is fixed with a connector for externally connecting an air inflation pump.

[0006] Preferably, the oil seal main body includes an elastic rubber layer, an insulating interlayer, a wear-resistant rubber layer, an anti-corrosion inner coating and a heat-insulating interlayer. The insulating interlayer is fixed inside the elastic rubber layer, and the wear-resistant rubber layer is fixed inside the insulating interlayer. The wear-resistant rubber layer is coated with an anti-corrosion inner coating inside. The heat-insulating interlayer is fixed on the side of the elastic rubber layer away from the insulating interlayer.

[0007] Preferably, a support plate is embedded and fixed inside the oil seal main body on the outside of the active air chamber. A pressure sensor is arranged on the inner bottom surface of the support plate for detecting the pressure inside the active air chamber.

[0008] Preferably, the support plate is arranged in a ring shape matching the active air chamber, and the cross section is arranged in a horizontally placed "U" shape matching the active air chamber. The opening side of the support plate faces the inside of the oil seal main body.

[0009] Preferably, ventilation holes adapted to the air guide pipes are formed in the side wall of the support plate. The connecting head is externally connected to the air outlet of an air inflation pump. The thickness of the support plate is smaller than the thickness between the upper and lower sealing grooves.

[0010] Preferably, an outer protective layer is fixed to the outside of the heat insulation interlayer, and an anti-corrosion outer coating is coated and wrapped on the outside of the outer protective layer. The thickness of the anti-corrosion outer coating is equal to the thickness of the anti-corrosion inner coating, and the thickness of the outer protective layer is equal to the thickness of the wear-resistant rubber layer.

[0011] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0012] 1. In the present utility model, through the combined sealing design, by means of the sliding fit of the rubber on the inner side and the inner sides of the upper and lower ends of the movable air chamber with the output component, the sealing effect of the rubber oil seal is ensured. And after wear, by increasing the air pressure, the rubber on the inner side of the movable air chamber is made to fit with the output component, thereby avoiding the occurrence of gaps due to wear, and solving the problem that the existing high-pressure sealing rubber oil seal is prone to reduced sealing performance due to wear, and greatly improving the sealing effect of the rubber oil seal.

[0013] 2. In the present utility model, through the inner elastic rubber layer, when the air pressure inside the movable air chamber increases, the rubber oil seal deforms to fit with the output component, and the inner and outer insulating interlayers and heat insulation interlayers cooperate to improve the insulation and heat insulation performance of the rubber oil seal. Cooperating with the inner and outer anti-corrosion coatings, the self-protection performance of the rubber oil seal is further improved, thereby increasing the service life of the rubber oil seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a front view schematic diagram of the three-dimensional structure of the rubber oil seal proposed by the present utility model;

[0015] Figure 2 is a bottom view schematic diagram of the three-dimensional structure of the rubber oil seal proposed by the present utility model;

[0016] Figure 3 is a partial sectional schematic diagram of the three-dimensional structure of the rubber oil seal proposed by the present utility model;

[0017] Figure 4 is a sectional schematic diagram of the oil seal body of the three-dimensional structure of the rubber oil seal proposed by the present utility model.

[0018] Legend: 1. Oil seal body; 11. Elastic rubber layer; 12. Insulating interlayer; 13. Wear-resistant rubber layer; 14. Anti-corrosion inner coating; 15. Heat insulation interlayer; 16. Outer protective layer; 17. Anti-corrosion outer coating; 2. Sealing groove; 3. Movable air chamber; 4. Air guide pipe; 5. Electric air valve; 6. Connecting head; 7. Support plate; 8. Air pressure sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0020] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0021] Embodiment 1

[0022] As Figures 1-4 shown, the present utility model provides a high-pressure sealing rubber oil seal, which includes an oil seal main body 1. Sealing grooves 2 are provided at the upper and lower edges of the oil seal main body 1. An active air cavity 3 is provided inside the oil seal main body 1 between the upper and lower sealing grooves 2. A gas guide pipe 4 is fixedly connected through the inside of the oil seal main body 1 on the side of the active air cavity 3. An electric air valve 5 is provided on the gas guide pipe 4. A connection head 6 is fixed at one end of the gas guide pipe 4 away from the oil seal main body 1 for externally connecting an air inflation pump. A support plate 7 is embedded and fixed inside the oil seal main body 1 outside the active air cavity 3. A pressure sensor 8 is provided on the inner bottom surface of the support plate 7 for detecting the pressure inside the active air cavity 3.

[0023] The following specifically describes the specific settings and functions of this embodiment: The support plate 7 is set to be annular and matched with the active air cavity 3, and the cross-section is set to be a horizontally placed "U" shape matched with the active air cavity 3. The opening side of the support plate 7 faces the inside of the oil seal main body 1. When the air pressure inside the active air cavity 3 increases, only the oil seal main body 1 at the opening of the support plate 7 bulges and deforms, so that the oil seal main body 1 inside the active air cavity 3 deforms and fits the outer surface of the output component. Vent holes matched with the gas guide pipe 4 are provided inside the side wall of the support plate 7 to ensure the connection between the active air cavity 3 and the gas guide pipe 4, so as to conveniently fill the active air cavity 3 with air flow through the gas guide pipe 4 to increase the air pressure, thereby expanding and deforming the oil seal main body 1. The connection head 6 is externally connected to the air outlet of the air inflation pump. The thickness of the support plate 7 is less than the thickness between the upper and lower sealing grooves 2, which supports the oil seal main body 1 to ensure that the support plate 7 can support the active air cavity 3 and prevent the oil seal main body 1 from deforming when the oil seal main body 1 between the two sealing grooves 2 is sealed and clamped, thereby ensuring the airtightness inside the active air cavity 3.

[0024] Embodiment 2

[0025] As Figures 1-4As shown in the figure, the oil seal body 1 includes an elastic rubber layer 11, an insulating interlayer 12, a wear-resistant rubber layer 13, an anti-corrosion inner coating 14, and a heat-insulating interlayer 15. The insulating interlayer 12 is fixed inside the elastic rubber layer 11, and the wear-resistant rubber layer 13 is fixed inside the insulating interlayer 12. The anti-corrosion inner coating 14 is coated on the inner side of the wear-resistant rubber layer 13, and the heat-insulating interlayer 15 is fixed on the side of the elastic rubber layer 11 away from the insulating interlayer 12.

[0026] The effect achieved by the entire embodiment is that an outer protective layer 16 is fixed on the outside of the heat-insulating interlayer 15. The outer protective layer 16 protects the elastic rubber layer 11 and the heat-insulating interlayer 15, ensuring that the elasticity of the elastic rubber layer 11 and the heat-insulating effect of the heat-insulating interlayer 15 can be fully exerted. An anti-corrosion outer coating 17 is coated on the outside of the outer protective layer 16. The thickness of the anti-corrosion outer coating 17 is equal to the thickness of the anti-corrosion inner coating 14, and the thickness of the outer protective layer 16 is equal to the thickness of the wear-resistant rubber layer 13. The outer protective layer 16 further protects the elastic rubber layer 11, and the anti-corrosion outer coating 17 cooperates with the anti-corrosion inner coating 14 to provide anti-corrosion protection for the outer surface of the oil seal.

[0027] The usage method and working principle of this device: When using the oil seal body 1, the oil seal body 1 is installed and sleeved on the outside of the output component, and the air guide pipe 4 penetrates through the external structure and is connected to the air outlet of the air inflation pump through the connector 6, so that the upper and lower fastening structures are attached to the sealing slot 2, thereby ensuring the sealing performance of the connection between the oil seal body 1 and the output component. When the inner side of the oil seal body 1 is worn, the air inflation pump and the electric air valve 5 are opened, and air flow is inflated into the movable air chamber 3 through the air guide pipe 4, increasing the air pressure inside the movable air chamber 3, so that the oil seal body 1 inside the movable air chamber 3 deforms and fits on the output component, thereby ensuring the sealing performance of the oil seal connection. At the same time, the air pressure sensor 8 can detect the air pressure inside the movable air chamber 3 and compare it with the air pressure outside the oil seal body 1, avoiding inconvenient movement of the processing component due to excessive air pressure and weakening of the sealing performance due to contraction of the oil seal body 1 caused by too low air pressure. When the air pressure inside the movable air chamber 3 is low, the electric air valve 5 and the air inflation pump are opened in time for inflation.

[0028] The above is only a preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical content of the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A high-pressure sealing rubber oil seal, comprising an oil seal body (1), characterized in that: The upper and lower edges of the oil seal body (1) are both provided with sealing grooves (2); a movable air cavity (3) is provided inside the oil seal body (1) between the upper and lower sealing grooves (2); and an air guide tube (4) is fixedly passed through the oil seal body (1) on the side of the movable air cavity (3); an electric air valve (5) is provided on the air guide tube (4); and a connector (6) is fixedly provided at one end of the air guide tube (4) away from the oil seal body (1) for connecting an external air pump.

2. A high pressure sealing rubber oil seal according to claim 1, characterized in that: The oil seal body (1) comprises an elastic rubber layer (11), an insulating interlayer (12), a wear-resistant rubber layer (13), an anti-corrosion inner coating (14) and a heat-insulating interlayer (15); the insulating interlayer (12) is fixed on the inner side of the elastic rubber layer (11), and the wear-resistant rubber layer (13) is fixed on the inner side of the insulating interlayer (12); the inner side of the wear-resistant rubber layer (13) is coated with an anti-corrosion inner coating (14); and the heat-insulating interlayer (15) is fixed on the side of the elastic rubber layer (11) away from the insulating interlayer (12).

3. A high pressure sealing rubber oil seal according to claim 1, characterized in that: A support plate (7) is embedded and fixed inside the oil seal body (1) outside the active air cavity (3), and an air pressure sensor (8) is provided on the bottom surface of the support plate (7) for detecting the pressure inside the active air cavity (3).

4. A high pressure sealing rubber oil seal according to claim 3, characterized in that: The support plate (7) is arranged in a ring shape to match the active air cavity (3), and the cross section is arranged in a transversely placed "U" shape to match the active air cavity (3), and the opening side of the support plate (7) faces the inner side of the oil seal body (1).

5. A high pressure sealing rubber oil seal according to claim 3, characterized in that: A vent hole cooperating with the air guide tube (4) is provided in the side wall of the support plate (7); the connector (6) is externally connected to the air outlet of the air pump; and the thickness of the support plate (7) is smaller than the thickness between the upper and lower sealing grooves (2).

6. A high pressure sealing rubber oil seal according to claim 2, characterized in that: An outer protective layer (16) is fixed to the outside of the heat-insulating interlayer (15), and an anti-corrosion outer coating (17) is coated on the outside of the outer protective layer (16). The thickness of the anti-corrosion outer coating (17) is equal to the thickness of the anti-corrosion inner coating (14), and the thickness of the outer protective layer (16) is equal to the thickness of the wear-resistant rubber layer (13).

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