An embedded composite rubber oil seal

Abstract

This utility model relates to the field of oil seal technology and discloses an embedded combined rubber oil seal, including a main oil seal and a secondary oil seal disposed on the inner wall of the main oil seal. The inner wall of the secondary oil seal has an embedded oil seal with textured surface. The inner wall of the main oil seal has a first embedding groove, and the outer side of the secondary oil seal has a first embedding buckle that cooperates with the first embedding groove. The inner wall of the secondary oil seal has a second embedding groove, and the outer side of the embedded oil seal has a second embedding buckle that cooperates with the second embedding groove. It has the advantages of significantly improved sealing performance, stable connection, strong pressure resistance, easy installation and replacement, and strong adaptability. It solves the problems of easy leakage and wear of traditional single-layer oil seals under complex working conditions and overcomes the defects of unstable connection, easy displacement or detachment of multi-layer oil seal combinations. It reduces equipment maintenance costs and time and enhances the durability and sealing reliability of oil seals in high-speed, high-pressure or corrosive environments.

Description

Technical Field

[0001] This utility model relates to the field of oil seal technology, specifically to an embedded combined rubber oil seal. Background Technology

[0002] In mechanical transmission and rotating equipment, oil seals are critical components for preventing lubricating oil leakage and the intrusion of external contaminants. Traditional oil seals mostly employ a single sealing layer structure, which is prone to problems such as seal failure, accelerated wear, or poor installation stability under conditions of high-speed operation, high temperature and pressure, or highly corrosive media. Some existing technologies attempt to use multi-layer oil seal composite structures, but the layers are usually connected only by interference fit or adhesive bonding, resulting in drawbacks such as easy displacement, weak pressure resistance, and inconvenient disassembly and assembly. This is especially problematic in applications requiring frequent replacement or maintenance.

[0003] Existing oil seals are often difficult to assemble and disassemble quickly and reliably, which affects the overall operating efficiency and service life of the equipment. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides an embedded combined rubber oil seal, which has the advantages of significantly improved sealing performance, stable connection, strong pressure resistance, easy installation and replacement, and strong adaptability. It solves the problems of easy leakage and wear of traditional single-layer oil seals under complex working conditions, and overcomes the defects of unstable connection, easy displacement or detachment when multi-layer oil seals are combined. It reduces equipment maintenance costs and time, and enhances the durability and sealing reliability of oil seals in high-speed, high-pressure or corrosive environments.

[0005] (II) Technical Solution To achieve the aforementioned goals of significantly improved sealing performance, stable connection, strong pressure resistance, easy installation and replacement, and strong adaptability, this utility model provides the following technical solution: an embedded combined rubber oil seal, including a main oil seal and a secondary oil seal disposed on the inner wall of the main oil seal. The inner wall of the secondary oil seal is provided with an embedded oil seal, and the inner wall of the embedded oil seal is provided with a texture. The inner wall of the main oil seal is provided with a first embedding groove, and the outer side of the secondary oil seal is provided with a first embedding buckle that cooperates with the first embedding groove. The inner wall of the secondary oil seal is provided with a second embedding groove, and the outer side of the embedded oil seal is provided with a second embedding buckle that cooperates with the second embedding groove.

[0006] Preferably, the secondary oil seal is installed on the inner wall of the main oil seal via a first insert buckle and a first insert groove, and the embedded oil seal is installed on the inner wall of the secondary oil seal via a second insert buckle and a second insert groove.

[0007] Preferably, the main oil seal has a first fixing buckle on one side and a first fixing groove on the other side that engages with the first fixing buckle.

[0008] Preferably, one side of the secondary oil seal is provided with a second fixing buckle, and the other side of the secondary oil seal is provided with a second fixing groove that engages with the second fixing buckle.

[0009] Preferably, one side of the embedded oil seal is provided with a third fixing buckle, and the other side of the embedded oil seal is provided with a third fixing groove that engages with the third fixing buckle.

[0010] (III) Beneficial Effects Compared with the prior art, this utility model provides an embedded combined rubber oil seal with the following advantages: This embedded combined rubber oil seal adopts a triple sealing structure of main oil seal, auxiliary oil seal and embedded oil seal, and enhances the fit and lubrication retention effect of the sealing contact surface through the texture design of the inner wall of the embedded oil seal, effectively preventing leakage. Furthermore, the mutual cooperation of the first embedded buckle and the first embedded groove, and the second embedded buckle and the second embedded groove, ensures that the oil seals are tightly embedded and not easily displaced or loosened. It is suitable for high-speed and high-pressure conditions. Each layer of oil seal is equipped with a fixing buckle and groove, which supports independent disassembly and assembly layer by layer. It can be quickly assembled or replaced without special tools, which greatly improves maintenance efficiency. The multi-layer combined structure can select different materials or hardness according to the usage requirements, improves the adaptability to different media, temperatures and pressures, and extends the service life. Attached Figure Description

[0011] Figure 1 This is a structural diagram of the present invention; Figure 2 This is an exploded view of the structure of this utility model. Figure 3 This is a side view of the exploded structure of this utility model.

[0012] In the diagram: 1. Main oil seal; 101. First fixing buckle; 102. First inlay groove; 103. First fixing slot; 2. Secondary oil seal; 201. Second fixing buckle; 202. First inlay buckle; 203. Second inlay groove; 204. Second fixing slot; 3. Embedded oil seal; 301. Third fixing buckle; 302. Second inlay buckle; 303. Third fixing slot; 4. Texture. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Example: Please refer to Figure 1-3An embedded composite rubber oil seal includes a main oil seal 1 and a secondary oil seal 2 disposed on the inner wall of the main oil seal 1. The inner wall of the secondary oil seal 2 is provided with an embedded oil seal 3, and the inner wall of the embedded oil seal 3 is provided with a texture 4. The inner wall of the main oil seal 1 is provided with a first inlay groove 102, and the outer side of the secondary oil seal 2 is provided with a first inlay buckle 202 that cooperates with the first inlay groove 102. The inner wall of the secondary oil seal 2 is provided with a second inlay groove 203, and the outer side of the embedded oil seal 3 is provided with a second inlay buckle 302 that cooperates with the second inlay groove 203.

[0015] Among them, the main oil seal 1 is the skeleton and basic load-bearing component of the entire oil seal assembly. It is usually made of materials with good rigidity and high strength, such as a metal skeleton wrapped with rubber, or high-strength engineering plastics. Its main function is to ensure the interference fit between the oil seal and the equipment housing, provide a stable static seal, and withstand the main system pressure. The first insert groove 102 set in its inner wall is a key design. It is an annular, semi-circular groove used to combine with the auxiliary oil seal. The auxiliary oil seal 2 serves as an intermediate transition layer and functional reinforcement layer. It is usually made of rubber material with good elasticity and wear resistance. The first insert buckle 202 on its outer side is a protruding structure that matches the groove of the main oil seal. Its shape is complementary to the first insert groove 102. This " The groove-buckle fit forms a robust mechanical interlock, ensuring that the secondary oil seal will not detach from the primary oil seal under pressure or rotation. The second insert groove 203 on its inner wall is used to receive the innermost oil seal. The embedded oil seal 3 is the most critical layer for achieving dynamic sealing. It is in direct contact with the rotating shaft, so it is usually made of rubber material with excellent wear resistance, low coefficient of friction and self-lubricating properties, such as fluororubber FKM, polyurethane PU, etc. The second insert buckle 302 on its outer side engages with the second insert groove 203 of the secondary oil seal to complete the fixation of the three-layer structure. The texture 4 on its inner wall is the core function. The texture 4 is used to enhance lubrication, heat dissipation or oil scraping effect.

[0016] The secondary oil seal 2 is installed on the inner wall of the main oil seal 1 through the combination of the first insert buckle 202 and the first insert groove 102, and the embedded oil seal 3 is installed on the inner wall of the secondary oil seal 2 through the combination of the second insert buckle 302 and the second insert groove 203.

[0017] The auxiliary oil seal is mechanically assembled with the main oil seal and the embedded oil seal with a snap-fit ​​mechanism, rather than by adhesive bonding or one-time vulcanization. If any layer, especially the vulnerable embedded oil seal, is damaged, it can be replaced individually without scrapping the entire oil seal assembly, thus reducing maintenance costs.

[0018] The main oil seal 1 has a first fixing buckle 101 on one side and a first fixing groove 103 on the other side that engages with the first fixing buckle 101. The secondary oil seal 2 has a second fixing buckle 201 on one side and a second fixing groove 204 on the other side that engages with the second fixing buckle 201. The embedded oil seal 3 has a third fixing buckle 301 on one side and a third fixing groove 303 on the other side that engages with the third fixing buckle 301.

[0019] During maintenance, the oil seal does not need to be disassembled and installed over large components at the shaft end, such as gears or couplings. Simply opening the clips allows the oil seal to be removed or installed from the side of the shaft, greatly simplifying the installation and maintenance process and saving significant time and manpower. It is also suitable for situations where axial disassembly is not possible; for some compact equipment with limited space at the shaft end, this is the only sealing solution.

[0020] Working principle: The outer ring of the main oil seal 1 is interference-fitted with the mounting hole of the equipment housing, generating a huge radial clamping force, thereby achieving a static seal between the housing and the oil seal, preventing oil leakage from the outer ring. The main, auxiliary, and embedded three-layer oil seals are tightly engaged through the embedding groove and snap-fit, achieving a static seal between each layer and preventing oil leakage between layers. The inner diameter of the embedded oil seal 3 is designed to be smaller than the diameter of the shaft. When installed on the shaft, the sealing lip of its inner wall will generate a continuous and uniform radial contact pressure on the shaft surface. This contact pressure forms a very thin and stable oil film between the lip and the shaft. This oil film must not only play a lubricating role to prevent dry friction of the lip from causing overheating and wear, but also have sufficient surface tension to effectively block a large amount of oil leakage. This is the core sealing principle of all lip seals. The texture of the inner wall of the embedded oil seal is the key to active sealing. When the shaft is in a stationary state, the texture is in close contact with the shaft, providing a static seal. This embedded composite rubber oil seal achieves ease of installation and maintenance through its modular mechanical assembly design; its three-layer progressive structure ensures reliable sealing and adaptability to different operating conditions; and its precision lip design and texture achieve near-zero leakage and long service life under dynamic operating conditions. It is a high-performance, highly reliable, and easy-to-maintain advanced sealing solution.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An embedded composite rubber oil seal, characterized in that: It includes a main oil seal (1) and a secondary oil seal (2) disposed on the inner wall of the main oil seal (1). The inner wall of the secondary oil seal (2) is provided with an embedded oil seal (3), and the inner wall of the embedded oil seal (3) is provided with a texture (4). The inner wall of the main oil seal (1) is provided with a first inlay groove (102), and the outer side of the secondary oil seal (2) is provided with a first inlay buckle (202) that cooperates with the first inlay groove (102). The inner wall of the secondary oil seal (2) is provided with a second inlay groove (203), and the outer side of the embedded oil seal (3) is provided with a second inlay buckle (302) that cooperates with the second inlay groove (203).

2. An insert molded combination rubber oil seal according to claim 1, characterized in that: The secondary oil seal (2) is installed on the inner wall of the main oil seal (1) through the combination of the first insert buckle (202) and the first insert groove (102), and the embedded oil seal (3) is installed on the inner wall of the secondary oil seal (2) through the combination of the second insert buckle (302) and the second insert groove (203).

3. An insert molded combination rubber oil seal according to claim 1, wherein: The main oil seal (1) has a first fixing buckle (101) on one side and a first fixing groove (103) on the other side that engages with the first fixing buckle (101).

4. An insert molded combination rubber oil seal according to claim 1, wherein: The secondary oil seal (2) has a second fixing buckle (201) on one side and a second fixing groove (204) on the other side that engages with the second fixing buckle (201).

5. An embedded combined rubber oil seal according to claim 1, characterized in that: The embedded oil seal (3) has a third fixing buckle (301) on one side, and a third fixing groove (303) on one side of the embedded oil seal (3) is engaged with the third fixing buckle (301).

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