Teflon double-sided oil seal structure

Abstract

The utility model relates to the technical field of oil seals, in particular to a teflon double-face oil seal structure which comprises a first ring body, a first plate body and a second plate body, the first plate body and the second plate body are arranged on the first ring body, a first elastic piece is clamped by the first plate body and the second plate body, and two extending parts are arranged at one end, away from the first plate body, of the first ring body. The free ends of the two extending parts are both provided with third elastic pieces, the two third elastic pieces are used for abutting against a component contained in the oil seal through the two extending parts, the first elastic piece is clamped between the first plate body and the second plate body, it is ensured that the oil seal and the component are in tight contact, and therefore leakage of oil liquid or other fluid is effectively prevented, the service life of the oil seal is prolonged, and the service life of the oil seal is prolonged. The two extending parts and the third elastic piece are designed to face the opposite directions, even abutting force can be provided in the two directions, when the oil seal is subjected to pressure in different directions, the force can be balanced through elastic deformation of the third elastic piece, and the stability and the sealing performance of the oil seal are kept.

Description

Technical Field

[0001] The utility model relates to the technical field of oil seals, and in particular discloses a polytetrafluoroethylene double-sided oil seal structure. Background Art

[0002] Traditional oil seals can be widely used in various mechanical equipment, including but not limited to automobiles, industrial machinery, aerospace and other fields, but the sealing performance of traditional oil seals is not ideal. Traditional oil seals are usually single-lip oil seals. For example, under high pressure, high speed or extreme working conditions, leakage is prone to occur. As the use time increases, the sealing preload pressure ratio of the rotating shaft will gradually decrease, resulting in a decrease in the sealing effect. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the utility model aims to provide a polytetrafluoroethylene double-sided oil seal structure.

[0004] To achieve the above-mentioned purpose, the utility model provides a polytetrafluoroethylene double-sided oil seal structure, comprising a first ring body, a first plate body and a second plate body arranged on the first ring body, the first plate body and the second plate body clamping a first elastic member, an extension portion is arranged at one end of the first ring body away from the first plate body, two extension portions are arranged, the two extension portions face opposite directions, and the free ends of the two extension portions are respectively provided with a third elastic member, and the two third elastic members are used to achieve resistance to the components accommodated inside the oil seal via the two extension portions. This design enhances the sealing effect of the oil seal on the shaft, and can maintain stable sealing performance even when the rotating shaft is eccentric or vibrates.

[0005] Furthermore, the first elastic member clamped between the first plate body and the second plate body ensures close contact between the oil seal and the component, thereby effectively preventing leakage of oil or other fluids. The two extensions and the third elastic member are designed to be in opposite directions, which can not only provide uniform resistance in two directions, but also balance these forces through the elastic deformation of the third elastic member when the oil seal is subjected to pressure in different directions, thereby maintaining the stability and sealing of the oil seal.

[0006] Furthermore, the first ring body is also provided with a third plate body, and the third plate body is used to cooperate with the first plate body to clamp the second elastic member. Through the synergistic effect of the third plate body and the first plate body, the second elastic member can be clamped more effectively, ensuring that the second elastic member maintains a stable shape and position when subjected to pressure, thereby providing a more uniform and reliable sealing effect. When the oil seal is subjected to external pressure, the second elastic member between the third plate body and the first plate body can disperse the pressure, reduce the pressure concentration in a single part, and reduce the risk of damage to the seal due to excessive force.

[0007] Furthermore, the extension part includes a first extension part. The free end of the first extension part is provided with a first bending part, which is bent and extended from the free end of the first extension part towards the first ring body. The first bending part cooperates with the first extension part to install / limit the third elastic part. The first bending part provides an accurate limiting point for the third elastic part, ensuring that the elastic part can maintain the correct position and posture after installation, helping to prevent the elastic part from shifting or falling off during the working process, thereby maintaining the stability and sealing performance of the oil seal. The coordinated action of the first bending part and the first extension part provides a more stable support for the third elastic part. This stable support structure can reduce the vibration and shaking of the elastic part during the working process, ensuring that the oil seal can work continuously and stably.

[0008] Furthermore, the extension part also includes a second extension part. The free end of the second extension part is provided with a second bending part, which is bent and extended from the free end of the second extension part towards the first ring body. The second bending part cooperates with the second extension part to install / limit the same third elastic part. The second bending part is bent and extended from the free end of the second extension part towards the first ring body, forming a frame for accommodating the third elastic part, which can more effectively install and limit the third elastic part, ensuring that it is not easy to fall off or shift during the working process, thereby improving the stability and reliability of the oil seal or sealing device.

[0009] Furthermore, the diameter of the first extension part gradually decreases from the end far away from the first bending part towards the end close to the first bending part. The first extension part is provided with a first through hole and a second through hole. The diameter of the first through hole gradually decreases from the end far away from the first bending part towards the end close to the first bending part, and the diameter of the second through hole gradually increases from the end far away from the first bending part towards the end close to the first bending part. The gradually decreasing diameter of the first extension part from the end far away from the first bending part towards the first bending part forms a natural strengthening structure near the first bending part. The gradually decreasing diameter of the first through hole from the end far away from the first bending part towards the end close to the first bending part helps the stress concentration phenomenon during the working process of the oil seal. Due to the gradual change of the diameter, the stress can be more concentrated, so that a stress peak appears at the included angle formed between the first through hole and the second through hole, increasing the sealing effect of the oil seal. The first through hole with a gradually decreasing diameter may help to form a tighter sealing interface, reducing the leakage of fluid or gas.

[0010] Furthermore, the second extension part, the second bending part have the same structure as the first extension part and the first bending part. Due to the same structure of the second extension part, the second bending part, the first extension part and the first bending part, the sealing effect of the oil seal is more prominent, enhancing the overall sealing performance. The double-sided seal can ensure a tighter closed space is formed between the two contact surfaces, thus effectively preventing the leakage of liquids, gases or other media, and being able to better resist the influence of external environmental factors such as temperature, pressure, vibration, etc. on the sealing performance, thereby extending the service life of the seal and the equipment.

[0011] Furthermore, both the second plate body and the third plate body are arc-shaped. The extension lengths of the second plate body and the third plate body are both less than that of the first plate body. An arc for accommodating the elastic member is provided on the first plate body for use in conjunction with the second plate body and the third plate body. The arc-shaped settings of the second plate body and the third plate body can better position the elastic member, ensuring a tight fit between the seal and the sealing surface, thereby reducing the risk of leakage. The arc on the first plate body for accommodating the elastic member enables the elastic member to be stably installed in the sealing structure, providing additional support and sealing pressure for the second plate body and the third plate body, further enhancing the sealing effect.

[0012] Furthermore, chamfers are provided on both the first bending part and the second bending part. The chamfers are located at the free ends of the first bending part and the second bending part to facilitate the entry of the elastic member. The chamfers provide a smooth entry path for the elastic member, reducing the resistance and friction during the installation process. Through the chamfers, it can be ensured that the elastic member can be accurately positioned to the predetermined position during the installation process. When it is necessary to disassemble or replace the elastic member, the chamfer design also provides convenience. It can reduce the resistance and difficulty during the disassembly process, making the maintenance work easier and more efficient.

[0013] Furthermore, the first elastic member and the second elastic member are O-shaped elastic members, and the third elastic member is an oil seal elastic member.

[0014] Furthermore, the first ring body, the first plate body, the second plate body, the third plate body, and the extension part are integrally injection-molded. During the injection molding process, the material will uniformly fill every corner of the mold, making each part of the oil seal more balanced in structure, helping to ensure that the oil seal can be evenly stressed during operation, reducing damage caused by local stress concentration. The integral injection molding process can precisely control the size and shape of the oil seal, ensuring its fitting accuracy with the rotating shaft. This high-precision fitting helps to reduce the formation of leakage channels and improve the sealing performance of the oil seal.

[0015] Advantages of the present utility model: The first elastic member clamped by the first plate body and the second plate body ensures the close contact between the oil seal and the rotating shaft, effectively preventing oil leakage. The two extension parts and the third elastic member can provide a stable abutting force when the rotating shaft is eccentric or jittery, maintaining the stability of the sealing performance. The second elastic member clamped in cooperation with the third plate body and the first plate body further disperses the external pressure, reducing the risk of seal damage. The designs of the first bending part and the second bending part not only provide precise limit and support for the third elastic member, but also facilitate the installation and disassembly of the elastic member through the chamfer design on them, improving the maintenance efficiency. In particular, the arc-shaped settings of the second plate body and the third plate body and their cooperation with the first bending part further optimize the fitting degree of the sealing interface, reducing the leakage risk. The one-piece injection molding process ensures the balance and high-precision fitting of each part of the oil seal, further enhancing the overall sealing effect and service life. Brief Description of the Drawings

[0016] Figure 1 One of the schematic diagrams of the body structure of the present utility model;

[0017] Figure 2 Another schematic diagram of the body structure of the present utility model;

[0018] Figure 3 Partial cross-sectional structure schematic diagram of the body of the present utility model;

[0019] Figure 4 Cross-sectional structure schematic diagram of the body of the present utility model.

[0020] Reference numerals include:

[0021] 1. First ring body; 2. First plate body; 3. Second plate body; 5. Extension part; 4. Third plate body; 6. First elastic member; 7. Second elastic member; 9. First extension part; 11. Second extension part; 12. First bending part; 13. Second bending part; 14. Third elastic member; 15. First through hole; 16. Second through hole. Detailed Description of the Preferred Embodiments

[0022] For the convenience of those skilled in the art, the present utility model will be further described below in conjunction with the embodiments and the drawings. The content mentioned in the embodiments does not limit the present utility model.

[0023] Please refer to Figures 1 to 4As shown, a polytetrafluoroethylene double-sided oil seal structure of the utility model comprises a first ring body 1, a first plate body 2 and a second plate body 3 arranged on the first ring body 1, the first plate body 2 and the second plate body 3 clamp a first elastic member 6, an extension portion 5 is arranged at one end of the first ring body 1 away from the first plate body 2, two extension portions 5 are arranged, the two extension portions 5 face opposite directions, and the free ends of the two extension portions 5 are respectively provided with a third elastic member 14, and the two third elastic members 14 are used to achieve resistance to the components accommodated inside the oil seal via the two extension portions 5. This design enhances the sealing effect of the oil seal on the shaft, and can maintain stable sealing performance even when the rotating shaft is eccentric or vibrates.

[0024] Specifically, the first elastic member 6 clamped between the first plate body 2 and the second plate body 3 ensures close contact between the oil seal and the component, thereby effectively preventing leakage of oil or other fluids. The two extensions 5 and the third elastic member 14 are designed to be in opposite directions, which can not only provide uniform resistance in two directions, but also balance these forces through the elastic deformation of the third elastic member 14 when the oil seal is subjected to pressure in different directions, thereby maintaining the stability and sealing of the oil seal.

[0025] Specifically, the first ring body 1 is also provided with a third plate body 4, and the third plate body 4 is used to cooperate with the first plate body 2 to clamp the second elastic member 7. Through the synergistic effect of the third plate body 4 and the first plate body 2, the second elastic member 7 can be clamped more effectively, ensuring that the second elastic member 7 maintains a stable shape and position when subjected to pressure, thereby providing a more uniform and reliable sealing effect. When the oil seal is subjected to external pressure, the second elastic member 7 between the third plate body 4 and the first plate body 2 can disperse the pressure, reduce the pressure concentration in a single part, and reduce the risk of damage to the seal due to excessive force.

[0026] Specifically, the extension portion 5 includes a first extension portion 9, and a first bending portion 12 is provided at the free end of the first extension portion 9. The first bending portion 12 is bent and extended from the free end of the first extension portion 9 to the first ring body 1. The first bending portion 12 cooperates with the first extension portion 9 to install / limit the third elastic member 14. The first bending portion 12 provides a precise limiting point for the third elastic member 14, ensuring that the elastic member can maintain the correct position and posture after installation, which helps to prevent the elastic member from being displaced or falling off during operation, thereby maintaining the stability and sealing performance of the oil seal. The synergistic effect of the first bending portion 12 and the first extension portion 9 provides a more stable support for the third elastic member 14. The stable support structure can reduce the vibration and shaking of the elastic member during operation, ensuring that the oil seal can work continuously and stably.

[0027] Specifically, the extension portion 5 further includes a second extension portion 11. A second bending portion 13 is provided at the free end of the second extension portion 11. The second bending portion 13 extends from the free end of the second extension portion 11 toward the first ring body 1. The second bending portion 13 cooperates with the second extension portion 11 to mount / limit the same third elastic member 14. The second bending portion 13 extends from the free end of the second extension portion 11 toward the first ring body 1, forming a frame for accommodating the third elastic member 14, which more effectively mounts and limits the third elastic member 14, ensuring that it is not easily detached or displaced during operation, thereby improving the stability and reliability of the oil seal or sealing device.

[0028] Specifically, the diameter of the first extension portion 9 gradually decreases from the end far from the first bending portion 12 to the end close to the first bending portion 12. The first extension portion 9 is provided with a first through hole 15 and a second through hole 16. The diameter of the first through hole 15 gradually decreases from the end far from the first bending portion 12 to the end close to the first bending portion 12. The diameter of the second through hole 16 gradually increases from the end far from the first bending portion 12 to the end close to the first bending portion 12. The fact that the diameter of the first extension portion 9 gradually decreases from the end far from the first bending portion 12 to the first bending portion 12 forms a natural strengthening structure near the first bending portion 12. The diameter of the first through hole 15 gradually decreases from the end far from the first bending portion 12 to the end close to the first bending portion 12, which helps to concentrate the stress during the operation of the oil seal. Due to the gradual change in diameter, the stress can be more concentrated, so that a stress peak appears at the angle formed between the first through hole 15 and the second through hole 16, increasing the sealing effect of the oil seal. The first through hole 15 with a gradually decreasing diameter may help to form a tighter sealing interface and reduce the leakage of fluid or gas.

[0029] Specifically, the second extension portion 11, the second bending portion 13 have the same structure as the first extension portion 9 and the first bending portion 12. Since the second extension portion 11, the second bending portion 13 have the same structure as the first extension portion 9 and the first bending portion 12, the sealing effect of the oil seal is more prominent, enhancing the overall sealing performance. The double-sided seal can ensure a tighter closed space is formed between the two contact surfaces, thus effectively preventing the leakage of liquid, gas or other media, and being able to better resist the influence of external environmental factors such as temperature, pressure, vibration, etc. on the sealing performance, thereby extending the service life of the sealing member and the equipment.

[0030] Specifically, both the second plate body 3 and the third plate body 4 are arc-shaped. The extension lengths of the second plate body 3 and the third plate body 4 are both less than that of the first plate body 2. An arc for accommodating the elastic member is provided on the first plate body 2 for use in conjunction with the second plate body 3 and the third plate body 4. The arc-shaped settings of the second plate body 3 and the third plate body 4 can better limit the elastic member, ensuring a tight fit between the seal and the sealing surface, thereby reducing the risk of leakage. The arc on the first plate body 2 for accommodating the elastic member enables the elastic member to be stably installed in the sealing structure, providing additional support and sealing pressure for the second plate body 3 and the third plate body 4, and further enhancing the sealing effect.

[0031] Specifically, chamfers are provided on both the first bending portion 12 and the second bending portion 13. The chamfers are located at the free ends of the first bending portion 12 and the second bending portion 13 to facilitate the entry of the elastic member. The chamfers provide a smooth entry path for the elastic member, reducing the resistance and friction during the installation process. Through the chamfers, it can be ensured that the elastic member can be accurately positioned at the predetermined position during the installation process. When the elastic member needs to be disassembled or replaced, the chamfer design also provides convenience. The chamfers can reduce the resistance and difficulty during the disassembly process, making the maintenance work easier and more efficient.

[0032] Specifically, the first elastic member 6 and the second elastic member 7 are O-shaped elastic members, and the third elastic member 14 is an oil seal elastic member.

[0033] Specifically, the second elastic member 8 is an oil seal elastic member with an inner diameter of 1.5mm * 49mm * 0.25 mm (wire diameter * inner diameter * wire diameter of the spring).

[0034] Specifically, the first elastic member 6 and the second elastic member 7 are O-shaped elastic members with an inner diameter of 5mm * 0.15mm * 2 * 253mm.

[0035] Specifically, the materials of the first elastic member 6 and the second elastic member 7 are both O-shaped spring WO301.

[0036] Specifically, the third elastic member 14 is an oil seal spring PYF301.

[0037] Specifically, the elastic member is a spring.

[0038] Specifically, the oil seal is a single-lip oil seal made of polytetrafluoroethylene (PTFE). Polytetrafluoroethylene shows excellent resistance to almost all chemical substances, including strong acids, strong bases, strong oxidants, and organic solvents. This means that the single-lip PTFE oil seal can work stably in various harsh chemical environments for a long time, and is not easily corroded or dissolved. The friction coefficient of polytetrafluoroethylene is extremely low, only 0.02, which is 1 / 40 of that of rubber. This low-friction characteristic enables the single-lip PTFE oil seal to significantly reduce friction loss and heat generation during rotation or sliding, improving the energy efficiency and lifespan of the equipment. The surface of the polytetrafluoroethylene material has outstanding self-lubricity, and almost all viscous substances cannot adhere to its surface. This helps to keep the oil seal clean and maintain its sealing performance, reducing the leakage risk caused by the accumulation of impurities.

[0039] Specifically, one end of the first plate body 2, the second plate body 3, and the third plate body 4 close to the first ring body 1 is provided with a radian. One end of the first plate body 2, the second plate body 3, and the third plate body 4 close to the first ring body 1 is C-shaped, and one end of the first plate body 2, the second plate body 3, and the third plate body 4 away from the first ring body 1 is provided in a straight line.

[0040] Specifically, the first ring body 1, the first plate body 2, the second plate body 3, the third plate body 4, and the extension part 5 are integrally injection-molded. During the injection molding process, the material will evenly fill every corner of the mold, making each part of the oil seal more balanced in structure, which helps to ensure that the oil seal can be evenly stressed during operation and reduce damage caused by local stress concentration. The integral injection molding process can precisely control the size and shape of the oil seal to ensure its fitting accuracy with the rotating shaft. This high-precision fitting helps to reduce the formation of leakage channels and improve the sealing performance of the oil seal.

[0041] The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A double-sided tetrafluoro oil seal structure, comprising a first ring body (1), a first plate body (2) and a second plate body (3) arranged on the first ring body (1), and a first elastic member (6) is clamped between the first plate body (2) and the second plate body (3); characterized in that: One end of the first ring body (1) away from the first plate body (2) is provided with extension parts (5). There are two extension parts (5), and the two extension parts (5) face in opposite directions. Third elastic parts (14) are arranged at the free ends of the two extension parts (5). The two third elastic parts (14) are used to abut against the components accommodated inside the oil seal via the two extension parts (5).

2. The structure of a double-sided tetrafluoro oil seal according to claim 1, characterized in that: The first ring body (1) is further provided with a third plate body (4). The third plate body (4) is used to cooperate with the first plate body (2) to clamp a second elastic part (7).

3. A double-sided tetrafluoro oil seal structure according to claim 1, characterized in that: The extension part (5) includes a first extension part (9). A first bending part (12) is arranged at the free end of the first extension part (9). The first bending part (12) is bent and extended from the free end of the first extension part (9) towards the first ring body (1). The first bending part (12) cooperates with the first extension part (9) to install / limit the third elastic part (14).

4. A tetrafluoro double-sided oil seal structure according to claim 3, characterized in that: The extension part (5) further includes a second extension part (11). A second bending part (13) is arranged at the free end of the second extension part (11). The second bending part (13) is bent and extended from the free end of the second extension part (11) towards the first ring body (1). The second bending part (13) cooperates with the second extension part (11) to install / limit the same third elastic part (14).

5. The structure of a double-sided tetrafluoro oil seal according to claim 3, characterized in that: The first extension part (9) is tubular. The diameter of the first extension part (9) gradually decreases from the end away from the first bending part (12) towards the end close to the first bending part (12). A first through hole (15) and a second through hole (16) are formed in the first extension part (9). The diameter of the first through hole (15) gradually decreases from the end away from the first bending part (12) towards the end close to the first bending part (12). The diameter of the second through hole (16) gradually increases from the end away from the first bending part (12) towards the end close to the first bending part (12).

6. A double-sided tetrafluoro oil seal structure according to claim 4, characterized in that: The second extension part (11), the second bending part (13) have the same structure as the first extension part (9), the first bending part (12).

7. A double-sided tetrafluoro oil seal structure according to claim 2, characterized in that: Both the second plate body (3) and the third plate body (4) are arc-shaped. The extension lengths of the second plate body (3) and the third plate body (4) are both smaller than the extension length of the first plate body (2). An arc for accommodating the elastic part is formed in the first plate body (2) for use in cooperation with the second plate body (3) and the third plate body (4).

8. A double-sided tetrafluoro oil seal structure according to claim 4, characterized in that: Chamfers are formed on both the first bending part (12) and the second bending part (13). The chamfers are located at the free ends of the first bending part (12) and the second bending part (13) to facilitate the entry of the elastic part.

9. A double-sided tetrafluoro oil seal structure according to claim 2, characterized in that: The first elastic part (6) and the second elastic part (7) are O-shaped elastic parts, and the third elastic part (14) is an oil seal elastic part.

10. A double-sided tetrafluoro oil seal structure according to claim 2, characterized in that: The first ring body (1), the first plate body (2), the second plate body (3), the third plate body (4) and the extension part (5) are integrally injection-molded.

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