Sealing ring oil seal with dustproof function
By using a Y-shaped double-lip structure and reinforced materials, the sealing ring oil seal solves the leakage and stability problems of traditional sealing ring oil seals in highly polluted environments, achieving a highly efficient dustproof and long-life sealing effect.
Patent Information
- Application Number
- CN202520465688.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-03-18
AI Technical Summary
Traditional sealing ring oil seals are prone to leakage in highly polluted environments or under high pressure conditions, and lack a stable connection, leading to lubricating oil leakage and the intrusion of external impurities, resulting in a short service life.
The Y-type double-lip seal consists of a fluororubber annular body, a main seal, and a dust lip. It features an embedded wave-shaped spring and trapezoidal positioning protrusions, combined with a PTFE wear-resistant layer and a nano-alumina coating to enhance sealing and wear resistance. A silicone-based sealant layer ensures a secure connection.
It effectively prevents lubricating oil leakage and the entry of external impurities, improves sealing performance, extends service life, enhances corrosion resistance and mechanical strength, and ensures long-term stability.
Smart Images
Figure CN223708532U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to oil seal technical field especially, relate to a sealing ring oil seal with dustproof function. BACKGROUND
[0002] In mechanical equipment, sealing ring oil seal is the key component of ensuring that lubricating oil does not leak and preventing external dust, moisture and other pollutants from entering the equipment. However, the traditional single lip structure is difficult to provide sufficient sealing effect, especially in high-pollution environment or high-pressure conditions, which can easily lead to lubricating oil leakage and external impurities intrusion. The sealing member made of ordinary material is easy to wear in the long-term use process, shortens the service life, and can cause equipment failure. Due to the lack of reliable positioning and fixing mechanism, the sealing ring may be displaced during equipment operation, affecting the sealing effect. SUMMARY
[0003] The utility model wants to overcome the prior art's insufficient and provides a sealing ring oil seal with dustproof function to solve the problem in the background art.
[0004] Therefore, the utility model provides a sealing ring oil seal with dustproof function, which comprises an annular main body made of fluorine rubber, a main sealing member and a dustproof lip are arranged on the inner periphery of the annular main body, and a Y-shaped double-lip structure is formed between the main sealing member and the dustproof lip.
[0005] One side of the dustproof lip is provided with a spiral flow guide groove.
[0006] The inner wall of the main sealing member is embedded with a wave-shaped spring.
[0007] The annular main body is provided with a positioning protrusion with a trapezoidal cross section, and the two side slopes of the positioning protrusion are in interference fit with the equipment mounting groove.
[0008] Optionally, the main sealing member and the dustproof lip are provided with a polytetrafluoroethylene wear-resistant layer on the inner side.
[0009] Optionally, the groove depth of the spiral flow guide groove is 0.1-0.3mm, and the adjacent groove spacing of the spiral flow guide groove is 2-3mm.
[0010] Optionally, the end face of the wave-shaped spring is in a continuous W-shaped ring structure.
[0011] Optionally, the outer wall of the positioning protrusion is provided with an annular groove, and the annular groove is filled with a silicon-based sealant layer.
[0012] Optionally, a ring-shaped metal skeleton is embedded in the main body, and the cross section of the ring-shaped metal skeleton is in L shape.
[0013] Optionally, the surface of the wave spring is provided with a nano-aluminum oxide coating, and the coating thickness is 5-10 μm.
[0014] From the above technical solutions, the embodiments of the utility model have the following advantages:
[0015] 1. The sealing ring oil seal with dustproof function of the utility model, through the main sealing piece and the dustproof lip constitutes Y type double lip structure, greatly promotes the sealing effect, effectively prevents the leakage of lubricating oil and the entry of external impurities. By setting the polytetrafluoroethylene wear-resistant layer inside the main sealing piece and the dustproof lip, and coating the nano-aluminum oxide coating on the surface of the wave spring, not only reduces the friction loss, but also enhances the overall durability and corrosion resistance of the sealing ring, prolongs the service life.
[0016] 2. The sealing ring oil seal with dustproof function of the utility model, through the trapezoidal section positioning protrusion of the outer periphery of the main body and the silicon-based sealant layer thereon ensures the stable connection between the oil seal and the equipment, prevents the leakage problem caused by loosening. In addition, the annular metal framework provides additional mechanical strength, further guarantees the integrity and effectiveness of the sealing structure.
[0017] The characteristics and advantages of the utility model will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF DRAWINGS
[0018] The utility model will be further explained in combination with the drawings:
[0019] Figure 1 It is the structural schematic diagram of the utility model;
[0020] Figure 2 It is the utility model Figure 1 It is the structure enlarged view of A in the utility model;
[0021] Figure 3 It is the wave spring structure schematic diagram of the utility model.
[0022] Explanation of reference numerals: 1, annular main body; 2, main sealing piece; 3, dustproof lip; 4, spiral flow guide groove; 5, wave spring; 6, positioning protrusion; 7, polytetrafluoroethylene wear-resistant layer; 8, annular metal framework; 9, annular groove; 10, silicon-based sealant layer. SPECIFIC EMBODIMENTS
[0023] The technical solutions of the embodiments of the utility model will be explained and described in combination with the drawings of the embodiments of the utility model, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0024] The utility model discloses an embodiment of a sealing ring oil seal with dustproof function.
[0025] Embodiment 1
[0026] For the convenience of understanding, please refer to Figures 1 to 3 An embodiment of a sealing ring oil seal with dustproof function provided by the utility model, including annular main body 1 made of fluorine rubber, the annular main body 1 inner periphery is equipped with main sealing piece 2 and dustproof lip 3, Y type double lip structure is formed between main sealing piece 2 and dustproof lip 3;
[0027] Dustproof lip 3 one side is equipped with helical flow guide groove 4;
[0028] The inner wall of main sealing piece 2 is embedded with wave spring 5;
[0029] The outer periphery of annular main body 1 is equipped with positioning protrusion 6 of trapezoidal section, and the two side slopes form interference fit with equipment mounting groove.
[0030] It should be noted that the annular main body 1 is made of fluorine rubber, which ensures good elasticity and chemical resistance. The selection of fluorine rubber is based on its excellent high temperature resistance and corrosion resistance, which is suitable for use in extreme environments.
[0031] Main sealing piece 2 and dustproof lip 3 constitute a Y type double lip structure, which increases the sealing effect and effectively prevents the invasion of dust and other small particles. The helical flow guide groove 4 is arranged on one side of the dustproof lip 3 for guiding dust and liquid to flow out along a predetermined path, avoiding direct contact with the main sealing piece 2. The wave spring 5 spring can provide continuous and uniform pressure to the main sealing piece 2.
[0032] In some embodiments, the main sealing piece 2 and the dustproof lip 3 are provided with a polytetrafluoroethylene wear-resistant layer 7 on the inner side.
[0033] It should be noted that the polytetrafluoroethylene wear-resistant layer 7 is arranged on the inner side of the main sealing piece 2 and the dustproof lip 3, which not only improves the wear resistance, but also enhances the sealing performance.
[0034] In some embodiments, the helical flow guide groove 4 has a groove depth of 0.1-0.3mm, and the adjacent groove spacing of the helical flow guide groove 4 is 2-3mm.
[0035] It should be noted that the helical flow guide groove 4 has a groove depth of 0.1-0.3mm, and the adjacent groove spacing of the helical flow guide groove 4 is 2-3mm, which can effectively improve the dust removal efficiency without affecting the overall sealing effect.
[0036] In some embodiments, the end surface of the wave spring 5 is in the form of a continuous W-shaped ring structure. The surface of the wave spring 5 is provided with a nano-alumina coating 13, with a thickness of 5-10 μm.
[0037] It should be noted that the presence of the wave spring 5 enables the seal to provide a continuous and uniform pressure when under compression, thereby enhancing the sealing effect. In addition, the surface of the wave spring 5 is coated with a nano-alumina coating, with a thickness of 5-10 μm, which further enhances the wear resistance and corrosion resistance of the spring.
[0038] In some embodiments, the positioning protrusion 6 is provided with an annular groove 9, and the annular groove 9 is filled with a silicon-based sealant layer 10.
[0039] It should be noted that the positioning protrusion 6 provided on the outer periphery of the annular body 1 has a trapezoidal cross-section, and the two side slopes form an interference fit with the equipment mounting groove, ensuring the stability of the oil seal installation. The outer wall of the positioning protrusion 6 is provided with an annular groove 9, which is filled with a silicon-based sealant layer 10, which helps to improve the sealing between the oil seal and the equipment.
[0040] In some embodiments, the annular body 1 is embedded with an annular metal skeleton 8, and the annular metal skeleton 8 has an L-shaped cross-section.
[0041] It should be noted that the annular body 1 is embedded with an annular metal skeleton 8 having an L-shaped cross-section, which provides additional mechanical strength to prevent damage to the seal ring due to excessive compression or stretching.
[0042] Working principle: When the oil seal is installed on the shaft of the equipment, the main seal 2 directly contacts the shaft surface, forming the first line of defense to prevent lubricating oil leakage. At the same time, the dust lip 3 acts as the second line of defense, preventing external dust and impurities from entering the equipment. To enhance sealing effectiveness and extend service life, a polytetrafluoroethylene wear-resistant layer 7 is set inside the main seal 2 and the dust lip 3. This material has low friction coefficient and excellent wear resistance, reducing wear between the seal and the shaft, ensuring long-term stable sealing performance. The spiral flow guide groove 4 on one side of the dust lip 3 is designed to guide external dust, moisture, and other contaminants outward along the spiral flow guide groove, rather than accumulating around the seal or penetrating into the equipment. This effectively reduces the impact of external pollutants on the seal, improving the reliability of the overall sealing system. The wave-shaped spring 5 embedded in the inner wall of the main seal 2 has a continuous W-shaped ring structure on its end face. In the working state, the spring can provide continuous and uniform pressure, making the main seal 2 tightly adhere to the shaft surface, maintaining good sealing effect even under vibration or temperature changes. In addition, the application of nano-alumina coating enhances the wear resistance and corrosion resistance of the spring, further ensuring long-term stable operation. The trapezoidal cross-section positioning protrusion 6 on the outer periphery of the annular body 1 and the annular groove 9 filled with a silicon-based sealant layer 10 ensure the tight connection between the oil seal and the equipment mounting groove, preventing leakage due to looseness. This interference fit not only improves installation stability, but also adds an additional sealing level. The embedded L-shaped cross-section annular metal skeleton 8 provides the necessary mechanical strength, protecting the seal ring from excessive compression or stretching, thereby maintaining the integrity and effectiveness of the sealing structure.
[0043] The above-described embodiments are merely used to illustrate the technical solutions of the present application, rather than limit them; although the foregoing embodiments of the present application have been described in detail, those skilled in the art should understand: they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A sealing ring oil seal with dustproof function, characterized in that: It includes an annular body (1) made of fluororubber, the annular body (1) having a main seal (2) and a dust lip (3) on its inner circumference, the main seal (2) and the dust lip (3) forming a Y-shaped double lip structure; The dustproof lip (3) has a spiral guide groove (4) on one side; The inner wall of the main seal (2) is fitted with a wave-shaped spring (5); The outer periphery of the annular body (1) is provided with a positioning protrusion (6) with a trapezoidal cross section, and the inclined surfaces on both sides of the protrusion form an interference fit with the equipment mounting groove.
2. The sealing ring oil seal with dustproof function according to claim 1, characterized in that: The main seal (2) and the dustproof lip (3) are provided with a polytetrafluoroethylene wear-resistant layer (7).
3. The sealing ring oil seal with dustproof function according to claim 1, characterized in that: The spiral guide groove (4) has a groove depth of 0.1-0.3 mm, and the distance between adjacent grooves of the spiral guide groove (4) is 2-3 mm.
4. The sealing ring oil seal with dustproof function according to claim 1, characterized in that: The end face of the wave spring (5) has a continuous W-shaped ring structure.
5. The sealing ring oil seal with dustproof function according to claim 1, characterized in that: The outer wall of the positioning protrusion (6) is provided with an annular groove (9), and the annular groove (9) is filled with a silicone-based sealant layer (10).
6. The sealing ring oil seal with dustproof function according to claim 1, characterized in that: The annular body (1) is fitted with an annular metal skeleton (8), and the cross-section of the annular metal skeleton (8) is L-shaped.
7. The sealing ring oil seal with dustproof function according to claim 1, characterized in that: The surface of the wave-shaped spring (5) is provided with a nano-alumina coating (13) with a coating thickness of 5-10 μm.