A combined seal ring assembly

Abstract

The utility model relates to sealing technical field especially, and it is a kind of combined seal ring assembly, including shell, the shell includes extension, the extension one side fixed mounting has connecting part, the extension outer surface is bonded with rubber body, the rubber body includes cladding, the cladding one side is connected with the department of sticking together, the department of sticking together one side is connected with extension, the extension one side is connected with dustproof lip, the dustproof lip one side is connected with main lip, the main lip outside is equipped with the groove of cooperation, the spring is equipped in the groove of cooperation, this combined seal ring assembly can strengthen the strength of rubber body, is worth promoting.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology, and in particular to a combined sealing ring assembly. Background Technology

[0002] In various industrial equipment and mechanical systems, sealing is a crucial element in ensuring normal operation, preventing leaks, and guaranteeing safety. Traditional combination seals have played an important role for a long time.

[0003] In the crankshaft oil seal of an automobile engine, the oil seal consists of a rubber body and a cold-rolled steel plate. The rubber body includes inner and outer sealing lips. The outer sealing lip prevents the intrusion of dust and impurities, while the inner sealing lip fits tightly against the shaft surface, further enhancing the sealing performance. The cold-rolled steel plate placed inside the oil seal increases the overall support strength of the rubber body.

[0004] When crankshaft oil seals are in use, the rotation of the crankshaft causes the rubber body to simultaneously bear radial tensile force and axial shear force, which can easily lead to detachment between the rubber body and the cold-rolled steel plate, affecting the service life of the oil seal. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies where the rubber body and cold-rolled steel plate are prone to debonding, and to propose a combined sealing ring assembly.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design a combined sealing ring assembly, including a housing, the housing including an extension, a connecting part fixedly installed on one side of the extension, a rubber body bonded to the outer surface of the extension, the rubber body including a covering part, a fitting part connected to one side of the covering part, an extension part connected to one side of the fitting part, a knurled layer on both sides of the connecting part near the extension, a dustproof lip connected to one side of the extension, a main lip connected to one side of the dustproof lip, a mating groove opened on the outer side of the main lip, and a spring installed inside the mating groove.

[0008] Preferably, the extension and the connecting part are made of cold-rolled steel sheet.

[0009] Preferably, the depth of the mating groove is greater than the radius of the spring.

[0010] Preferably, the dustproof lip is inclined to the side away from the main lip.

[0011] Preferably, the rubber body is made of hydrogenated nitrile butadiene rubber.

[0012] Preferably, the surface of the main lip is provided with a buffer layer, which is ring-shaped and integrally formed with the main lip by co-vulcanization.

[0013] Preferably, the surface of the buffer layer is uniformly provided with grooves.

[0014] Preferably, the knurled layer has a straight-knurled surface.

[0015] The present invention proposes a combined sealing ring assembly, which has the following advantages: When in use, the extension part and the connecting part can strengthen the support of the covering part and the fitting part, thereby improving the overall strength of the assembly. The knurled layer between the extension part and the connecting part can enhance the adhesion. The interlocking force can resist the radial tensile force and axial shear force that the rubber body will simultaneously bear when the shaft rotates, thus preventing the rubber body from delaminating with the housing. The dustproof part can prevent external dust and impurities from entering. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of a combined sealing ring assembly proposed in this utility model.

[0017] Figure 2 This is a top view of a combined sealing ring assembly proposed in this utility model.

[0018] Figure 3 This is a schematic diagram of the structure of the rubber body and the shell in a combined sealing ring assembly proposed in this utility model;

[0019] Figure 4 for Figure 3 A magnified structural diagram of point A in the middle.

[0020] In the figure: 100, shaft; 11, extension; 12, connecting part; 13, knurled layer; 21, rubber body; 22, main lip; 23, dustproof lip; 24, fitting part; 25, covering part; 26, extension; 31, mating groove; 32, spring; 41, buffer layer; 42, groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Example 1: Refer to Figure 1-3A combined sealing ring assembly includes a housing, the housing including an extension 11, and a connecting part 12 fixedly installed on one side of the extension 11. The extension 11 and the connecting part 12 are made of cold-rolled steel plate. The cold-rolled steel plate is rigid and corrosion resistant. In the application process, it is necessary to phosphate and coat its surface with anti-rust oil according to the specific situation, which can improve the stability of the adhesion between the housing and the rubber body 21.

[0023] A rubber body 21 is bonded to the outer surface of the extension portion 11. The rubber body 21 is made of hydrogenated nitrile butadiene rubber. Hydrogenated nitrile butadiene rubber has strong oil resistance, high temperature resistance, wear resistance, and corrosion resistance, which can improve the reliability of the rubber body 21 during use. The rubber body 21 includes a covering portion 25, and a fitting portion 24 is connected to one side of the covering portion 25. The covering portion 25 is located on the outside of the extension portion 11. The extension portion 11 and the connecting portion 12 can greatly improve the overall support performance of the covering portion 25 and the fitting portion 24, and strengthen the strength of the covering portion 25 and the fitting portion 24. An extension portion 26 is connected to one side of the fitting portion 24. The extension portion 26 is U-shaped and sleeved on the end of the connecting portion 12. Both sides of the end of the connecting part 12 near the extension part 26 are provided with knurled layers 13. The knurled layers 13 are straight knurled surfaces. The rough surface after knurling can increase the contact area between the extension part 26 and the connecting part 12, and can also allow the adhesive to adhere more evenly during vulcanization, further improving the bonding strength between the extension part 26 and the connecting part 12.

[0024] A dustproof lip 23 is connected to one side of the extension 26, and a main lip 22 is connected to the other side of the dustproof lip 23. The end of the dustproof lip 23 is inclined away from the main lip 22. The dustproof lip 23 is the outermost layer and can prevent dust and impurities from entering. The main lip 22 can withstand pressure and prevent leakage, thus enhancing the sealing performance. A mating groove 31 is provided on the outer side of the main lip 22. A spring 32 is provided inside the mating groove 31. The depth of the mating groove 31 is greater than the radius of the spring 32. Under the elastic action of the spring 32, the main lip 22 can always be tightly fitted to the surface of the shaft 100.

[0025] Working principle: When in use, the extension part 11 and the connecting part 12 reinforce the covering part 25 and the fitting part 24, thereby improving the overall strength of the assembly. The knurled layer 13 between the extension part 26 and the connecting part 12 enhances the adhesion. The interlocking force can resist the radial tension and axial shear force that the rubber body 21 will simultaneously bear when the shaft 100 rotates, preventing the rubber body 21 from detaching from the housing. The dustproof part 23 prevents external dust and impurities from entering. The main lip 22 improves the oil resistance. The spring 32 improves the tightness of the fit between the main lip 22 and the surface of the shaft 100.

[0026] Example 2: In Example 1, the crankshaft speed is high, and there are changes in vibration, temperature, etc., making the crankshaft lip prone to wear and cracking. Therefore, this example is proposed. (Refer to...) Figure 4 In another preferred embodiment of this utility model, based on embodiment 1, a buffer layer 41 is provided on the surface of the main lip 22. The buffer layer 41 is annular and integrally formed with the main lip 22 by co-vulcanization. The buffer layer 41 is made of modified nitrile rubber, and its hardness is lower than that of the rubber body 21. The elasticity of the buffer layer 41 can fill the gap between the main lip 22 and the shaft 100 without affecting the sealing and oil-proof performance. The buffer layer 41 can relieve the contact pressure on the main lip 22 and avoid wear under vibration and high temperature conditions. Grooves 42 are uniformly formed on the surface of the buffer layer 41. The grooves 42 can store a small amount of lubricating oil, reduce dry friction, and reduce lip wear.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A combined sealing ring assembly, comprising a housing, characterized in that, The housing includes an extension (11), a connecting part (12) is fixedly installed on one side of the extension (11), a rubber body (21) is bonded to the outer surface of the extension (11), the rubber body (21) includes a covering part (25), a fitting part (24) is connected to one side of the covering part (25), an extension part (26) is connected to one side of the fitting part (24), a knurled layer (13) is provided on both sides of the connecting part (12) near the extension part (26), a dustproof lip (23) is connected to one side of the extension part (26), a main lip (22) is connected to one side of the dustproof lip (23), a mating groove (31) is provided on the outer side of the main lip (22), and a spring (32) is provided inside the mating groove (31).

2. The combined sealing ring assembly according to claim 1, characterized in that, The extension (11) and the connecting part (12) are made of cold-rolled steel plate.

3. The combined sealing ring assembly according to claim 1, characterized in that, The depth of the mating groove (31) is greater than the radius of the spring (32).

4. The combined sealing ring assembly according to claim 1, characterized in that, The dustproof lip (23) is inclined at the end to the side away from the main lip (22).

5. The combined sealing ring assembly according to claim 1, characterized in that, The rubber body (21) is made of hydrogenated nitrile butadiene rubber.

6. The combined sealing ring assembly according to claim 1, characterized in that, The surface of the main lip (22) is provided with a buffer layer (41), which is ring-shaped and is co-vulcanized integrally with the main lip (22).

7. The combined sealing ring assembly according to claim 6, characterized in that, The surface of the buffer layer (41) is uniformly provided with grooves (42).

8. The combined sealing ring assembly according to claim 1, characterized in that, The knurled layer (13) has a straight knurled surface.

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