Double-lip oil seal assembly with high air tightness

Abstract

The utility model discloses a double-lip oil seal assembly with high air tightness, and relates to the technical field of double-lip oil seals. The improved structure comprises a framework outer sleeve, a main lip and an auxiliary lip are arranged on the inner side of the framework outer sleeve, the main lip is fixedly connected with the framework outer sleeve through a connecting ring, an empty groove is formed in the framework outer sleeve, a framework body is arranged in the empty groove, a clamping groove is formed in the connecting ring, and the clamping groove is fixedly connected with the framework outer sleeve. Through the framework main body and the pressure-bearing sheet, and through the supporting effect of the framework main body and the pressure-bearing sheet, the excessive pressing force of the main lip on the movable rod is reduced, so that the abrasion condition of the main lip is reduced, and the main lip can keep the original shape and function for a longer time; due to the fact that the abrasion of the main lip is reduced, the replacement frequency of the oil seal assembly is correspondingly reduced, the maintenance cost is reduced, the downtime is shortened, and the oil seal assembly is particularly important for mechanical equipment needing continuous operation.

Description

Technical Field

[0001] The utility model relates to the technical field of double-lip oil seals, in particular to a double-lip oil seal component with strong airtightness. Background Art

[0002] Compared with single lip oil seal, double lip oil seal has more complex structure and has two lip-shaped sealing lips. This design provides better sealing performance and is suitable for working environment with higher speed and pressure. The two lips of double lip oil seal have different functions. The main lip is responsible for retaining lubricant and preventing leakage, while the auxiliary lip provides additional protection against the entry of contaminants such as dirt, dust and water. This design not only helps prevent leakage and contamination, but also helps reduce friction and wear on the shaft.

[0003] During the installation and use of the existing double-lip oil seal, the pressure inside the oil seal will change with the movement of the telescopic shaft. When the inner pressure is strong, the connecting pressure between the main lip part of the oil seal and the telescopic shaft will gradually increase to offset the impact of the high pressure on the main lip, thereby causing faster wear of the main lip part and reducing the service life of the oil seal. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide a double-lip oil seal assembly with strong airtightness to solve the technical problem that when the inner pressure is strong, the connecting pressure between the main lip part of the oil seal and the telescopic shaft will gradually increase, resulting in faster wear of the main lip part.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-lip oil seal assembly with strong airtightness, comprising a skeleton outer sleeve, a main lip and a secondary lip are arranged on the inner side of the skeleton outer sleeve, the main lip is fixedly connected to the skeleton outer sleeve through a connecting ring, an empty groove is provided inside the skeleton outer sleeve, a skeleton body is arranged inside the empty groove, a card slot is provided inside the connecting ring, and a pressure-bearing sheet is arranged inside the card slot.

[0006] By adopting the above technical solution, the main lip is a key component of the sealing oil, and its integrity and stability are crucial to the sealing effect. By reducing the wear of the main lip, it can be ensured that the oil seal assembly always maintains a high sealing performance and effectively prevents oil leakage and the entry of external contaminants.

[0007] Furthermore, the skeleton body is fixedly connected to the pressure-bearing sheet, and the skeleton body and the pressure-bearing sheet are both made of stainless steel.

[0008] By adopting the above technical solution, stainless steel is a high-strength, corrosion-resistant material with good mechanical properties and stability. Using stainless steel as the material for the skeleton body and pressure-bearing plates can ensure that these components can maintain their structural integrity and stability when subjected to high pressure and harsh environments.

[0009] Furthermore, the skeleton body is engaged with the empty slot, the pressure-bearing sheet is engaged with the slot, and the cross-sections of the skeleton body and the pressure-bearing sheet are "U"-shaped structures.

[0010] By adopting the above technical solution, a tight connection and fixation is achieved. This design enables the skeleton body and the pressure-bearing plate to maintain a stable position when under pressure, reducing the possibility of displacement or deformation. The skeleton body and the pressure-bearing plate with a "U"-shaped structure can better adapt to and fit the shape of the connecting ring and the main lip.

[0011] Furthermore, the skeleton outer shell, the connecting ring and the main lip are all made of wear-resistant rubber, a placement groove is provided on the main lip, and a spring is arranged inside the placement groove.

[0012] By adopting the above technical solution, wear-resistant rubber is a material with excellent wear resistance, which can effectively resist friction and wear. Using wear-resistant rubber as the material of the skeleton jacket, connecting ring and main lip can significantly improve the wear resistance of these components and extend their service life.

[0013] Furthermore, a cavity is formed between the main lip and the auxiliary lip, a pressure dividing mechanism is arranged inside the cavity, and the pressure dividing mechanism includes a fixing ring.

[0014] By adopting the above technical solution, the main function of the pressure-dividing mechanism is to disperse and bear part of the pressure between the main lip and the auxiliary lip. Through components such as the fixing ring, the pressure-dividing mechanism can effectively disperse the hydraulic pressure on one side of the oil seal to a larger area, reduce the pressure on the main lip, and thus reduce its wear.

[0015] Furthermore, the fixing ring is fixedly connected to the connecting ring, and a pressing end is provided on one side of the fixing ring.

[0016] By adopting the above technical solution, the fixed connection between the fixing ring and the connecting ring ensures the stability and integrity between the two. This connection method avoids the relative displacement or looseness that may occur during the operation of the oil seal, thereby improving the structural stability of the entire oil seal assembly.

[0017] Furthermore, the cross section of the pressing end is a conical structure, and the fixing ring and the pressing end are both made of wear-resistant rubber.

[0018] By adopting the above technical solution, the conical structure design of the pressing end makes it have better adaptability and pressure distribution effect. When the movable rod moves, the conical structure can adaptively adjust the contact area with the movable rod to ensure a close fit while dispersing and bearing the pressure from the movable rod.

[0019] Furthermore, the auxiliary lip is made of soft rubber, and the cross section of the auxiliary lip is a wavy structure.

[0020] By adopting the above technical solution, the soft rubber has excellent flexibility and elasticity, which enables the auxiliary lip to better adapt to the movement and shape changes of the movable rod. The flexibility of the soft rubber also helps to reduce friction and wear between the movable rod, thereby extending the service life of the auxiliary lip. The design of the auxiliary lip can prevent external dust, impurities, etc. from entering the interior of the machine.

[0021] In summary, the utility model mainly has the following beneficial effects:

[0022] 1. The utility model uses the skeleton body and the pressure-bearing sheet. The main lip is the part of the oil seal assembly that is in direct contact with the movable rod. Its sealing performance directly affects the effect of the entire oil seal assembly. By reducing the wear of the main lip, it can ensure that the main lip always maintains a good sealing state, effectively preventing oil leakage and the invasion of external pollutants. Through the support of the skeleton body and the pressure-bearing sheet, the excessive pressure of the main lip on the movable rod is reduced, thereby reducing the wear of the main lip, which means that the main lip can maintain its original shape and function for a longer time, thereby extending the service life of the entire oil seal assembly. Due to the reduction in the wear of the main lip, the replacement frequency of the oil seal assembly will also be reduced accordingly, thereby reducing maintenance costs and downtime, which is particularly important for mechanical equipment that needs to run continuously;

[0023] 2. The utility model provides a fixed ring and a pressing end, and uses the fixed ring and the pressing end to press the movable rod. This design can share the pressure of the main lip. When the pressure on one side of the oil seal increases, the connecting ring will deform slightly, and the presence of the fixed ring and the pressing end can effectively absorb and disperse this part of the pressure, thereby reducing the burden on the main lip. Due to the pressure-sharing effect of the fixed ring and the pressing end, the pressure on the main lip is reduced, which helps to reduce the deformation and wear of the main lip. The main lip can maintain a stable shape and sealing performance for a longer time, thereby extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0025] Figure 2 This is a schematic diagram of the cross-sectional structure of the first embodiment of the utility model;

[0026] Figure 3 It is a schematic diagram of the cross-sectional structure of the second embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the pressure-bearing sheet structure of the first embodiment of the utility model.

[0028] In the figure: 1. skeleton outer sleeve; 2. hollow groove; 3. main lip; 4. connecting ring; 5. slot; 601. skeleton body; 602. pressure-bearing plate; 7. auxiliary lip; 8. pressure-dividing mechanism; 801. fixing ring; 802. pressing end; 9. cavity; 10. placement slot; 11. spring. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0030] The following describes an embodiment of the utility model based on its overall structure.

[0031] Embodiment 1:

[0032] A double-lip oil seal assembly with strong airtightness, such as Figure 1-Figure 4 As shown, it includes a skeleton jacket 1, and a main lip 3 and a secondary lip 7 are arranged on the inner side of the skeleton jacket 1. The main lip 3 is fixedly connected to the skeleton jacket 1 through a connecting ring 4. A hollow groove 2 is opened inside the skeleton jacket 1, and a skeleton body 601 is arranged inside the hollow groove 2. A card slot 5 is opened inside the connecting ring 4, and a pressure-bearing plate 602 is arranged inside the card slot 5. The main lip 3 is a key component of sealing oil, and its integrity and stability are crucial to the sealing effect. By reducing the wear of the main lip 3, it can be ensured that the oil seal assembly always maintains a high sealing performance, and effectively prevents oil leakage and the entry of external pollutants. The oil seal assembly is an important component in mechanical equipment, and its performance directly affects the operating stability and reliability of the equipment. By reducing the wear of the main lip 3, equipment failures caused by oil seal failure can be reduced, and the overall operating efficiency and reliability of the equipment can be improved.

[0033] See also Figure 1 , Figure 2 , Figure 4 The skeleton body 601 is fixedly connected to the pressure plate 602. The skeleton body 601 and the pressure plate 602 are both made of stainless steel. Stainless steel is a high-strength, corrosion-resistant material with good mechanical properties and stability. Using stainless steel as the material of the skeleton body 601 and the pressure plate 602 can ensure that these components can maintain their structural integrity and stability when subjected to high pressure and harsh environments. This supporting role helps to disperse and bear the hydraulic pressure on one side of the oil seal, thereby reducing the excessive pressure of the main lip 3 on the active rod, reducing the wear of the main lip 3, and thus extending the service life of the entire oil seal assembly.

[0034] See also Figure 1 , Figure 2 , Figure 4The skeleton body 601 is engaged with the empty groove 2, and the pressure piece 602 is engaged with the slot 5. The cross-sections of the skeleton body 601 and the pressure piece 602 are "U"-shaped structures, which realize tight connection and fixation. This design enables the skeleton body 601 and the pressure piece 602 to maintain a stable position when under pressure, reducing the possibility of displacement or deformation. The "U"-shaped skeleton body 601 and the pressure piece 602 can better adapt to and fit the shape of the connecting ring 4 and the main lip 3. This fit provides more effective support, helps to disperse the hydraulic pressure on one side of the oil seal, further reduces the wear of the main lip, and improves installation efficiency and convenience.

[0035] See also Figure 1 , Figure 2 , Figure 4 The skeleton jacket 1, the connecting ring 4 and the main lip 3 are all made of wear-resistant rubber. A placement groove 10 is provided on the main lip 3, and a spring 11 is arranged inside the placement groove 10. Wear-resistant rubber is a material with excellent wear resistance and can effectively resist friction and wear. Wear-resistant rubber is used as the material of the skeleton jacket 1, the connecting ring 4 and the main lip 3, which can significantly improve the wear resistance of these components and extend their service life. The wear-resistant rubber material and the buffering effect of the spring 11 jointly ensure the close fit between the main lip 3 and the movable rod, thereby improving the sealing performance of the oil seal assembly, which helps to prevent oil leakage and the intrusion of external pollutants and ensure the normal operation of the mechanical equipment.

[0036] Embodiment 2:

[0037] See also Figure 1 , Figure 3 A cavity 9 is formed between the main lip 3 and the auxiliary lip 7. A pressure dividing mechanism 8 is arranged inside the cavity 9. The pressure dividing mechanism 8 includes a fixing ring 801. The main function of the pressure dividing mechanism 8 is to disperse and bear part of the pressure between the main lip 3 and the auxiliary lip 7. Through the fixing ring 801 and other components, the pressure dividing mechanism 8 can effectively disperse the hydraulic pressure on one side of the oil seal to a larger area, reduce the pressure on the main lip 3, and thus reduce its wear. By dispersing the pressure through the pressure dividing mechanism 8, the wear rate of the main lip 3 can be significantly reduced, which means that the main lip can maintain its shape and function for a longer time, thereby extending the service life of the entire oil seal assembly.

[0038] See also Figure 1 , Figure 3The fixing ring 801 is fixedly connected to the connecting ring 4, and a pressing end 802 is provided on one side of the fixing ring 801. The fixed connection between the fixing ring 801 and the connecting ring 4 ensures the stability and integrity between the two. This connection method avoids the relative displacement or looseness that may occur during the operation of the oil seal, thereby improving the structural stability of the entire oil seal assembly. Due to the fixed connection between the fixing ring 801 and the connecting ring 4 and the design of the pressing end 802, the replacement and maintenance of these components are relatively simple. This design simplifies the maintenance and replacement process of the oil seal assembly and reduces the maintenance cost.

[0039] See also Figure 1 , Figure 3 The cross-section of the pressing end 802 is a conical structure. The materials of the fixing ring 801 and the pressing end 802 are both wear-resistant rubber. The conical structure design of the pressing end 802 enables it to have better adaptability and pressure distribution effect. When the movable rod moves, the conical structure can adaptively adjust the contact area with the movable rod to ensure a tight fit while dispersing and bearing the pressure from the movable rod. Wear-resistant rubber is a material with excellent wear resistance and can resist friction and wear. Using wear-resistant rubber as the material of the fixing ring 801 and the pressing end 802 can significantly improve the durability of these components and extend their service life.

[0040] See also Figure 1 , Figure 2 , Figure 3 The auxiliary lip 7 is made of soft rubber, and the cross-section of the auxiliary lip 7 is a wavy structure. The soft rubber has excellent flexibility and elasticity, which enables the auxiliary lip 7 to better adapt to the movement and shape change of the movable rod. The flexibility of the soft rubber also helps to reduce the friction and wear between the movable rod, thereby extending the service life of the auxiliary lip 7. The design of the auxiliary lip 7 can prevent external dust, impurities, etc. from entering the interior of the machine. Secondly, the auxiliary lip 7 usually works with the main lip 3 to form a tighter and more effective seal. The improvement of the sealing effect helps to prevent oil leakage and the intrusion of external pollutants, thereby ensuring the normal operation of the mechanical equipment.

[0041] The implementation principle of the utility model is:

[0042] Principle of the first embodiment: First, the oil seal assembly is sleeved on the movable rod. When the movable rod contracts, the pressure on the oil seal side of the oil seal assembly gradually increases, which causes the main lip 3 to press too hard on the movable rod, causing excessive wear of the main lip 3. The skeleton body 601 and the pressure-bearing sheet 602 are used to support the connecting ring 4 and the main lip 3, and the hydraulic pressure on one side of the oil seal is strongly borne, thereby reducing the excessive pressure of the main lip 3 on the movable rod, reducing the wear of the main lip 3, and prolonging the service life of the main lip 3.

[0043] Principle of the second embodiment: As the pressure on one side of the oil seal gradually increases, the connecting ring 4 will deform slightly, and the deformation is positively correlated with the pressure. As the deformation of the connecting ring 4 gradually increases, the fixed ring 801 and the pressing end 802 are used to press the movable rod to share the pressure of the main lip 3 and reduce the wear of the main lip 3.

[0044] Parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art, and will not be described in detail here.

[0045] Although an embodiment of the utility model has been shown and described, this specific embodiment is only an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A double-lip oil seal assembly with strong airtightness, characterized in that: The invention comprises a skeleton jacket (1), wherein a main lip (3) and a secondary lip (7) are arranged on the inner side of the skeleton jacket (1), wherein the main lip (3) is fixedly connected to the skeleton jacket (1) via a connecting ring (4), wherein a hollow groove (2) is provided inside the skeleton jacket (1), wherein a skeleton body (601) is provided inside the hollow groove (2), wherein a retaining groove (5) is provided inside the connecting ring (4), and wherein a pressure-bearing sheet (602) is provided inside the retaining groove (5).

2. The double-lip oil seal assembly with strong airtightness according to claim 1, characterized in that: The skeleton body (601) is fixedly connected to the pressure-bearing sheet (602), and the skeleton body (601) and the pressure-bearing sheet (602) are both made of stainless steel.

3. The double-lip oil seal assembly with strong airtightness according to claim 1, characterized in that: The skeleton body (601) is engaged with the empty slot (2), and the pressure-bearing sheet (602) is engaged with the slot (5). The cross-sections of the skeleton body (601) and the pressure-bearing sheet (602) are "U"-shaped structures.

4. The double-lip oil seal assembly with strong airtightness according to claim 1, characterized in that: The skeleton outer shell (1), the connecting ring (4) and the main lip (3) are all made of wear-resistant rubber. A placement groove (10) is provided on the main lip (3), and a spring (11) is arranged inside the placement groove (10).

5. The double-lip oil seal assembly with strong airtightness according to claim 1, characterized in that: A cavity (9) is formed between the main lip (3) and the auxiliary lip (7), and a pressure dividing mechanism (8) is arranged inside the cavity (9), wherein the pressure dividing mechanism (8) comprises a fixing ring (801).

6. The double-lip oil seal assembly with strong airtightness according to claim 5, characterized in that: The fixing ring (801) is fixedly connected to the connecting ring (4), and a pressing end (802) is provided on one side of the fixing ring (801).

7. The double-lip oil seal assembly with high airtightness according to claim 6, characterized in that: The cross section of the pressing end (802) is a conical structure, and the material of the fixing ring (801) and the pressing end (802) are both wear-resistant rubber.

8. The double-lip oil seal assembly with strong airtightness according to claim 1, characterized in that: The auxiliary lip (7) is made of soft rubber, and the cross section of the auxiliary lip (7) is a wave-shaped structure.

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