Split oil seal

Abstract

The utility model discloses a split type oil seal, which relates to the technical field of oil seals, and is characterized in that the middle of the outer wall of an oil seal main body is provided with a sealing lip notch, one side of the inner wall of the oil seal main body is connected with a sealing ring, and the other side of the inner wall of the oil seal main body is provided with a sealing seat. The split oil seal disclosed by the utility model can be directly assembled on a shaft or in a bearing seat hole by arranging the sealing lip notch, the shaft or any large associated equipment does not need to be disassembled in the whole process, the installation process is simplified, and the downtime is shortened; by arranging a double-labyrinth sealing structure, through double guarantee of contact type sealing and non-contact type sealing, a more complex labyrinth flow channel structure is formed, higher sealing efficiency and larger pressure difference bearing capacity are provided, the overall leakage risk is reduced, static sealing and overall stability of a split connector are strengthened by arranging an outer ring spring, and the sealing performance of the split connector is improved. And the radial holding force of the dynamic sealing lip to the shaft is enhanced by arranging the inner ring spring.

Description

Split oil seal Technical Field

[0001] This utility model relates to the field of oil seal technology, specifically to a split-type oil seal. Background Technology

[0002] An oil seal is a sealing device used between a rotating shaft and a stationary housing. Its core function is to prevent lubricating oil leakage and isolate external contaminants. A split oil seal is a specially designed oil seal structure. Its core feature is that the oil seal body is designed as two or more parts, usually two symmetrical semicircles, which are assembled in the field into a complete sealing ring through specific interface structures and connection methods.

[0003] When installing or replacing oil seals on the market, it is usually necessary to completely disassemble the spindle that it is paired with before the oil seal can be installed in the mounting position on the shaft. For large, heavy equipment or equipment installed in hard-to-access locations, the downtime maintenance task is too time-consuming, labor-intensive and inconvenient, resulting in excessive downtime. Summary of the Invention

[0004] The purpose of this invention is to provide a split oil seal to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a split oil seal, comprising a sealing lip cutout in the middle of the outer wall of the oil seal body, a sealing ring connected to one side of the inner wall of the oil seal body, and a sealing seat installed on the other side of the inner wall of the oil seal body, the inner side of the sealing seat being the sealing medium side, a limiting groove being formed in the middle of the outer wall of the sealing seat, and an outer ring spring being connected inside the limiting groove, and a limiting cavity being formed inside the sealing seat, and an inner ring spring being connected inside the limiting cavity.

[0006] Preferably, the sealing lip cut is a stepped surface to ensure a smooth, continuous and leak-free sealing surface after docking, which is a dynamic contact seal.

[0007] By making the sealing lip cut into a butt joint to form a sealing surface, it blocks most of the lubricating oil or grease and withstands the system pressure.

[0008] Preferably, the sealing ring is a non-contact sealing barrier that can prevent external contaminants from entering the sealing system.

[0009] By aligning the sealing ring with the atmospheric environment, external impurities are prevented from entering, thus protecting the oil seal lip and internal bearing.

[0010] Preferably, the sealing seat is a labyrinth barrier that blocks oil or oil mist that leaks out slightly from the slit in the sealing lip.

[0011] The throttling effect of the sealing seat significantly reduces the oil pressure and flow rate reaching the main labyrinth.

[0012] Preferably, the sealing ring and the sealing seat form a double labyrinth, thereby reducing the overall leakage risk through dual protection of contact sealing and non-contact sealing.

[0013] The more complex labyrinth flow channel structure with double labyrinth provides higher sealing efficiency and greater pressure differential resistance, thereby improving reliability.

[0014] Preferably, the outer ring spring is a split spring, which can provide radial expansion force to push the outer diameter of the oil seal to fit tightly against the bearing seat hole, forcing the sealing lip of the oil seal to be pressed tightly, eliminating potential leakage channels at the interface.

[0015] By setting the expansion force of the outer ring spring to provide additional radial constraint, the risk of micro-displacement of the interface due to vibration is reduced, and the overall structural rigidity is improved.

[0016] Preferably, the inner ring spring can enhance the radial clamping force of the dynamic sealing lip on the shaft, adapting to shaft runout and eccentricity.

[0017] The inner ring spring automatically compensates for wear gaps by continuously applying radial contraction force to the lip, maintaining stable sealing pressure. The elasticity of the spring also allows the sealing lip to fit against the shaft surface in real time, preventing leakage caused by momentary detachment.

[0018] Preferably, a limiting protrusion is connected to the side of the oil seal body near the limiting groove, and the limiting protrusion is annular.

[0019] When the oil seal is inserted into the bearing housing hole, the limiting protrusion is radially compressed by setting a limiting protrusion, which generates a reverse elastic force to tightly adhere to the hole wall, forming two continuous annular sealing bands.

[0020] As can be seen from the above, the split oil seal provided by this utility model has the following beneficial effects.

[0021] 1. By setting a sealing lip cut, it can be directly assembled on the shaft or inside the bearing housing hole. Maintenance personnel only need to wrap the oil seal body from both sides of the shaft to ensure that a smooth, continuous and leak-free sealing surface is formed after docking. Then, the connecting parts are tightened at the sealing lip cut to complete the installation. The whole process does not require disassembling the shaft or any large related equipment, which simplifies the installation process and shortens downtime.

[0022] 2. By setting up a double labyrinth sealing structure, it provides dual protection through contact sealing and non-contact sealing, and forms a more complex labyrinth flow channel structure, providing higher sealing efficiency and greater pressure differential resistance, and reducing the overall leakage risk.

[0023] 3. The static sealing and overall stability of the split interface are enhanced by setting an outer ring spring, and the radial clamping force of the dynamic sealing lip on the shaft is enhanced by setting an inner ring spring.

[0024] 4. By setting a limiting protrusion, when the oil seal is inserted into the bearing housing hole, the limiting protrusion is subjected to radial compression, generating a reverse elastic force to tightly adhere to the hole wall, forming two continuous annular sealing bands, thereby preventing external contaminants from entering and internal lubricating media from leaking axially along the bearing housing hole. Attached Figure Description

[0025] Figure 1 is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 is a three-dimensional structural diagram of this utility model;

[0027] Figure 3 is a top view of the three-dimensional structure of this utility model;

[0028] Figure 4 is a three-dimensional structural diagram of this utility model.

[0029] In the diagram: 1. Oil seal body; 2. Sealing lip cutout; 3. Sealing ring; 4. Sealing seat; 5. Sealing medium side; 6. Limiting protrusion; 7. Limiting groove; 8. Outer ring spring; 9. Limiting cavity; 10. Inner ring spring. Detailed Implementation

[0030] 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.

[0031] Please refer to Figures 1-4. This utility model provides the following technical solution: a split oil seal, comprising a sealing lip cutout 2 in the middle of the outer wall of the oil seal body 1, a sealing ring 3 connected to one side of the inner wall of the oil seal body 1, and a sealing seat 4 installed on the other side of the inner wall of the oil seal body 1. The inner side of the sealing seat 4 is the sealing medium side 5. A limiting groove 7 is formed in the middle of the outer wall of the sealing seat 4, and an outer ring spring 8 is connected inside the limiting groove 7. A limiting cavity 9 is formed inside the sealing seat 4, and an inner ring spring 10 is connected inside the limiting cavity 9. The sealing lip cutout 2 is a stepped surface, ensuring a smooth, continuous, and leak-free sealing surface after mating, which is a dynamic contact seal.

[0032] In practice, by setting a sealing lip cutout 2 on the oil seal body 1, it can be directly assembled on the shaft or inside the bearing housing hole. Maintenance personnel only need to wrap the oil seal body 1 around the shaft from both sides to ensure that the sealing lip cutout 2 forms a smooth, continuous and leak-free sealing surface after mating. Then, the connecting parts are tightened at the sealing lip cutout 2 to complete the installation. This blocks most of the lubricating oil or grease. The whole process does not require disassembling the shaft or any large related equipment, which simplifies the installation process, shortens downtime, and avoids equipment damage or alignment problems that may be caused by disassembling large components, thus significantly reducing downtime and maintenance costs.

[0033] Referring to Figures 1, 3 and 4, the sealing ring 3 is a non-contact sealing barrier that can prevent external contaminants from entering the sealing system; the sealing seat 4 is a labyrinth barrier that blocks oil or oil mist that leaks from the sealing lip cutout 2; the sealing ring 3 and the sealing seat 4 form a double labyrinth, thereby reducing the overall leakage risk through the dual protection of contact sealing and non-contact sealing.

[0034] In practical implementation, by aligning the sealing ring 3 towards the atmospheric environment, external impurities are blocked from entering, protecting the oil seal lip and internal bearing. The throttling effect of the sealing seat 4 significantly reduces the oil pressure and flow rate reaching the main labyrinth. At this time, the sealing ring 3 and the sealing seat 4 form a double labyrinth, with the inner side of the sealing seat 4 being the sealing medium side 5, and the lip responsible for medium sealing. The labyrinth is dedicated to external contamination protection. This dual design achieves both lubricant leakage prevention and impurity interception, thereby providing higher sealing efficiency and greater pressure differential resistance, and reducing the overall leakage risk.

[0035] Referring to Figures 1, 3 and 4, the outer ring spring 8 is a split spring, which can provide radial expansion force to push the outer diameter of the oil seal to fit tightly against the bearing housing hole, forcing the sealing lip cutout 2 of the oil seal to press tightly and eliminate potential leakage channels at the interface; the inner ring spring 10 can enhance the radial clamping force of the dynamic sealing lip on the shaft to adapt to shaft runout and eccentricity.

[0036] In practical implementation, by inserting the outer ring spring 8 into the limiting groove 7, the expansion force provides additional radial constraint, reducing the risk of micro-displacement of the interface due to vibration, and improving the overall structural rigidity. Furthermore, during equipment operation, the thermal expansion coefficients of the metal bearing housing and the rubber or metal composite oil seal differ. The elasticity of the outer ring spring 8 absorbs the deformation difference, maintaining stable contact pressure and preventing seal failure due to thermal cycling. By inserting the inner ring spring 10 into the limiting cavity 9, a continuous radial contraction force is applied to the lip, automatically compensating for wear gaps and maintaining stable sealing pressure. The elasticity of the spring ensures that the sealing lip can conform to the shaft surface in real time, preventing leakage due to momentary detachment. Therefore, the inner ring spring 10 is an adaptive actuator for dynamic sealing, ensuring a persistent and tight fit between the lip and the shaft, while the outer ring spring 8 is a reinforced locking ring for the split interface, eliminating the risk of static leakage and improving structural stability.

[0037] Referring to Figures 1-4, the oil seal body 1 is connected to a limiting protrusion 6 on the side near the limiting groove 7, and the limiting protrusion 6 is annular.

[0038] In practice, when the oil seal is inserted into the bearing housing hole, the limiting protrusion 6 is radially compressed, generating a reverse elastic force to tightly adhere to the hole wall, forming two continuous annular sealing bands, thereby preventing external contaminants from entering and internal lubricating media from leaking axially along the bearing housing hole.

[0039] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A split oil seal, comprising an oil seal body (1) having a sealing lip cutout (2) in the middle of its outer wall, characterized in that: A sealing ring (3) is connected to one side of the inner wall of the oil seal body (1), and a sealing seat (4) is installed on the other side of the inner wall of the oil seal body (1). The inner side of the sealing seat (4) is the sealing medium side (5). A limiting groove (7) is opened in the middle of the outer wall of the sealing seat (4), and an outer ring spring (8) is connected inside the limiting groove (7). A limiting cavity (9) is opened inside the sealing seat (4), and an inner ring spring (10) is connected inside the limiting cavity (9). The sealing lip cut (2) is a stepped surface to ensure that a smooth, continuous and leak-free sealing surface is formed after docking. It is a dynamic contact seal.

2. The split oil seal according to claim 1, characterized in that: The sealing ring (3) is a non-contact sealing barrier that can prevent external contaminants from entering the sealing system.

3. The split oil seal according to claim 2, characterized in that: The sealing seat (4) is a labyrinth barrier that blocks the oil or oil mist that leaks out from the incision (2) of the sealing lip.

4. The split oil seal according to claim 3, characterized in that: The sealing ring (3) and the sealing seat (4) form a double labyrinth, thereby reducing the overall leakage risk through dual protection of contact sealing and non-contact sealing.

5. The split oil seal according to claim 1, characterized in that: The outer ring spring (8) is a split spring, which can provide radial expansion force to push the outer diameter of the oil seal to fit tightly against the bearing seat hole, forcing the sealing lip cut (2) of the oil seal to be pressed tightly, eliminating potential leakage channels at the interface.

6. The split oil seal according to claim 1, characterized in that: The inner ring spring (10) can enhance the radial clamping force of the dynamic sealing lip on the shaft, adapting to shaft runout and eccentricity.

7. The split oil seal according to claim 1, characterized in that: The oil seal body (1) is connected to a limiting protrusion (6) on the side near the limiting groove (7), and the limiting protrusion (6) is annular.

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