Anti-deformation sealing ring

Abstract

The utility model discloses an anti-deformation sealing ring, including the body part and flat pad part of uniform annular coaxial setting, the cross section of body part is arcuate arch shape setting, the cross section of flat pad part is rectangle setting, and flat pad part and body part are integrally formed setting, and the chord side surface of body part is the annular plane matched with flat pad part, and body part includes the inner rubber ring layer, first intermediate reinforcing ring layer and outer rubber ring layer that are equipped with in proper order from inside to outside, and the pressure resistance of inner rubber ring layer and outer rubber ring layer is all lower than the pressure resistance of first intermediate reinforcing ring layer, through first intermediate reinforcing ring layer, the sealing ring strength is increased, effectively guarantee sealing under pressure, and body part deforms evenly and does not produce local too big deformation, avoids the rupture of sealing ring, guarantees the good sealing effect, and through the combination of integrally formed flat pad part and body part, the contact surface when the sealing ring is under pressure is increased, and the pressure is evenly dispersed, and the whole has the advantages of good sealing property, high anti-deformation ability and long service life.

Description

Technical Field

[0001] This utility model belongs to the field of sealing technology, and more specifically, it relates to an anti-deformation sealing ring. Background Technology

[0002] A sealing ring is an accessory used for sealing purposes. The main types include V-rings, U-rings, O-rings, and rectangular rings. O-rings are primarily used for static and reciprocating motion sealing, and are widely used in internal combustion locomotives, automobiles, tractors, construction machinery, machine tools, and various hydraulic and pneumatic components. However, existing O-rings are made of pure rubber. Due to the insufficient tensile and compressive strength and weak deformation resistance of rubber, they are prone to deformation under external pressure after prolonged use. This can easily lead to a loose seal, causing the O-ring to lose its original sealing performance and resulting in poor sealing. This is especially true when the width of the external extrusion face 12 is smaller than the diameter of the O-ring. Figure 1 As shown, the O-ring rubber seal 13 located in the sealing groove is squeezed by the external extrusion end face 12. The two sides of the seal 13 are squeezed and protrude outward. Over time, this can easily lead to deformation and breakage on both sides of the seal, which seriously affects the service life and sealing effect of the seal. Overall, it has the problems of low resistance to deformation, poor sealing performance and short service life. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an anti-deformation sealing ring with the advantages of good sealing performance, high anti-deformation ability and long service life.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] An anti-deformation sealing ring includes a body portion and a flat washer portion, both of which are annular. The cross-section of the body portion is arranged in an arc shape, and the cross-section of the flat washer portion is arranged in a rectangle. The flat washer portion and the body portion are arranged coaxially and integrally formed. The chord side of the body portion is an annular plane that matches the flat washer portion. The body portion includes an inner rubber ring layer, a first intermediate reinforcing ring layer, and an outer rubber ring layer arranged sequentially from the inside to the outside. The pressure resistance of the inner rubber ring layer and the outer rubber ring layer is lower than that of the first intermediate reinforcing ring layer.

[0006] Further configuration: The radially inner side of the main body is provided with an annular plane that matches the flat pad portion.

[0007] Further configuration: The flat pad portion is provided with a second intermediate reinforcing ring layer, the cross-section of the second intermediate reinforcing ring layer is rectangular, and a compression clearance area is provided between the first intermediate reinforcing ring layer and the second intermediate reinforcing ring layer.

[0008] Further configuration: The flat pad portion is provided with a second intermediate reinforcing ring layer; the second intermediate reinforcing ring layer and the first intermediate reinforcing ring layer are integrally formed and interconnected.

[0009] Further configuration: Both the first intermediate reinforcing ring layer and the second intermediate reinforcing ring layer are made of elastic metal or organic fiber material.

[0010] Further configuration: The main body portion has a chamfer on the side near the flat pad portion, and a concave arc is provided between the chamfer and the flat pad portion, which is radially concave inward towards the main body portion. The narrow end of the chamfer and the flat pad portion are connected by the concave arc.

[0011] Further configuration: The main body is provided with gaskets on both axial sides near the flat gasket, and the two axially opposite sides between the two gaskets are sealing planes, and the concave arc and the sealing plane are connected by the chamfer transition.

[0012] Further configuration: The compressive elastic force of the outer rubber ring layer is greater than or equal to the compressive elastic force of the inner rubber ring layer.

[0013] Further configuration: The compressive elasticity of the outer rubber ring layer is less than that of the inner rubber ring layer.

[0014] In summary, the combination of a body portion with a superior arc-shaped cross-section and a flat gasket portion with a rectangular cross-section increases the contact area between the sealing ring and the sealed element or sealing groove to distribute pressure and ensure that the overall deformation of the sealing ring does not affect the overall sealing effect due to excessive deformation. The integral molding of the body portion and the flat gasket portion enhances the overall structural strength and durability of the sealing ring, extending its service life. A first intermediate reinforcing ring layer between the inner and outer rubber ring layers ensures good elastic recovery of the sealing ring while supporting the outer rubber ring layer. When the seal is under pressure, it ensures uniform deformation of the arc-shaped surface of the body portion, preventing breakage of the sealing ring due to excessive local deformation of the body portion, extending its service life, and further enhancing the strength of the sealing ring and the deformation resistance of the body portion. The annular plane avoids unnecessary gaps between the body portion and the flat gasket portion, while also helping to evenly distribute the contact pressure generated by the flat gasket portion. Overall, it has the advantages of good sealing performance, high deformation resistance, and long service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an existing O-ring rubber seal under compression.

[0016] Figure 2 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0017] Figure 3 This is a cross-sectional view of Embodiment 1 of the present utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the flat pad in Embodiment 1 of the present invention, showing three different arrangements of the flat pad portion located on the radially outer side, axially upper side, and lower side of the main body portion.

[0019] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model;

[0020] Figure 6 This is a cross-sectional view of Embodiment 2 of the present invention;

[0021] Figure 7 This is a cross-sectional view of Embodiment 3 of the present invention;

[0022] Figure 8 This is a cross-sectional view of Embodiment 4 of this utility model.

[0023] In the figure: 1. Body; 2. Flat pad; 3. Inner rubber ring layer; 4. First intermediate reinforcing ring layer; 5. Outer rubber ring layer; 6. Second intermediate reinforcing ring layer; 7. O-ring; 8. Compression relief area; 9. Chamfer; 10. Concave arc; 11. Gasket ring; 12. External extrusion end face; 13. O-ring. Detailed Implementation

[0024] To explain the technical content, objectives, and effects of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings. It should be noted that the radial direction in both "inner radial side" and "outer radial side" throughout the text refers to a circumferential radial direction, which is related to... Figure 3 The direction of the annular diameter of the integral sealing ring is the same as ab, and the direction of "axial" throughout the text is the same as... Figure 3 The axial cd of the integral seal ring is the same.

[0025] The most crucial concept of this utility model lies in the following: The first intermediate reinforcing ring layer 4 increases the strength of the sealing ring, ensuring uniform deformation of the arc-shaped curved surface of the body part 1 and preventing damage or breakage of the sealing ring due to excessive local deformation of the body part 1. The integrally formed flat gasket 2 combined with the body part 1 increases the contact surface of the sealing ring to evenly distribute pressure, ensuring sealing performance, enhancing overall strength, and extending service life. The annular plane and the design of the cross-section of the body part 1 in a superior arc shape ensure that the flat gasket 2 can form appropriate compression in the chord direction of the cross-section of the body part 1, improving the installation sealing effect. Simultaneously, it avoids unnecessary gaps between the body part 1 and the flat gasket 2, helping to evenly distribute the contact pressure generated by the flat gasket 2, reducing local stress concentration, and extending service life. Overall, it possesses the advantages of good sealing performance, high deformation resistance, and long service life.

[0026] Please refer to Figures 2 to 8 As shown, an anti-deformation sealing ring includes a body portion 1 and a flat washer portion 2, both of which are annular. The cross-section of the body portion 1 is arranged in an arc shape, and the cross-section of the flat washer portion 2 is arranged in a rectangle. The flat washer portion 2 and the body portion 1 are arranged coaxially and are integrally formed. The chord side of the body portion 1 is an annular plane that matches the flat washer portion 2. The body portion 1 includes an inner rubber ring layer 3, a first intermediate reinforcing ring layer 4, and an outer rubber ring layer 5 arranged sequentially from the inside to the outside. The pressure resistance of the inner rubber ring layer 3 and the outer rubber ring layer 5 is lower than that of the first intermediate reinforcing ring layer 4.

[0027] As described above, during installation and use, the main body 1, with its arc-shaped cross-section, and the flat gasket 2, with its rectangular cross-section, are combined. When the seal is under pressure, the arc-shaped surface of the main body 1 contacts the external extrusion end face, while the side of the flat gasket 2 away from the main body 1 contacts the sealed element or sealing groove. This increases the contact area between the sealing ring and the sealed element or sealing groove to evenly distribute the pressure, reduce the extrusion deformation of the sealing ring, and ensure that the overall sealing effect is not affected by excessive deformation due to local pressure. The main body 1 and the flat gasket 2 are integrally molded, which enhances the structural strength and durability of the sealing ring and extends its overall service life. The use of the annular plane avoids unnecessary gaps between the main body 1 and the flat gasket 2, ensuring a good contact fit between them. At the same time, the annular plane helps to evenly distribute the contact pressure generated by the flat gasket 2, reducing local stress concentration and extending the overall service life.

[0028] The inner rubber ring layer 3 and the outer rubber ring layer 5 ensure that the sealing ring has good elastic recovery ability, ensuring that the sealing ring can better restore its original shape after being compressed, maintaining long-term sealing performance. At the same time, the first intermediate reinforcing ring layer 4 supports the outer rubber ring layer 5, enhancing the strength of the sealing ring and the resistance to deformation of the axial or radial sides of the body 1. When subjected to external extrusion end face sealing compression, it ensures that the body 1 is subjected to uniform pressure as a whole, avoiding local structural fracture of the sealing ring due to large deformation or excessive local deformation of the body 1. This enhances the sealing performance, resistance to deformation, and extends the service life. Overall, it has the advantages of good sealing performance, high resistance to deformation, and long service life.

[0029] Furthermore, the flat pad 2 is located on the radial side or the axial side of the body part 1.

[0030] As can be seen from the above description, when the flat gasket 2 is provided on the radial inner or outer side of the body part 1, it is used in the scenario where it is located in the sealing groove or on the sealing element on the radial inner or outer side of the integral sealing ring, respectively. When the flat gasket 2 is provided on the axial upper or lower side of the body part 1, it is used in the scenario where it is located in the sealing groove or on the sealing element on the axial upper or lower side of the integral sealing ring, respectively, thereby satisfying different application scenarios.

[0031] Furthermore, the flat pad 2 is provided with a second intermediate reinforcing ring layer 6, the cross-section of the second intermediate reinforcing ring layer 6 is rectangular, and a compression relief area 8 is provided between the first intermediate reinforcing ring layer 4 and the second intermediate reinforcing ring layer 6.

[0032] As can be seen from the above description, the second intermediate reinforcing ring layer 6 is used to improve the structural strength of the flat pad 2, ensure the sealing performance and service life of the flat pad 2, and the compression clearance area 8 is used to provide a margin for appropriate compression deformation at the connection between the flat pad 2 and the body part 1.

[0033] Furthermore, the flat pad 2 is provided with a second intermediate reinforcing ring layer 6; the second intermediate reinforcing ring layer 6 and the first intermediate reinforcing ring layer 4 are integrally formed and interconnected.

[0034] As can be seen from the above description, the second intermediate reinforcing ring layer 6, which is integrally formed with the first intermediate reinforcing ring layer 4, not only improves the structural strength of the flat gasket 2, but also further enhances the support effect on the overall sealing ring, ensuring the overall sealing performance and service life.

[0035] Furthermore, both the first intermediate reinforcing ring layer 4 and the second intermediate reinforcing ring layer 6 are made of elastic metal or organic fiber material.

[0036] As can be seen from the above description, by using elastic metal or organic fiber materials, and taking advantage of the good elasticity and non-breakability of metal or organic fiber materials, it is possible to ensure that the overall sealing ring is not easily deformed, and at the same time avoid the occurrence of sealing ring breakage, thereby improving the structural strength of the overall sealing ring.

[0037] Furthermore, the main body 1 has a chamfer 9 on the side near the flat pad 2, and a concave arc 10 is provided between the chamfer 9 and the flat pad 2, which is concave inward towards the main body 1. The narrow end of the chamfer 9 is connected to the flat pad 2 through the concave arc 10.

[0038] As can be seen from the above description, the chamfer 9 and concave arc 10 provide a space for compression deformation at the connection between the body part 1 and the flat pad part 2. At the same time, when the body part 1 and the flat pad part 2 are impacted, the chamfer 9 and concave arc 10 will generate two opposing reaction forces, which greatly improves the overall impact toughness and structural strength. It also enhances the connection strength between the body part 1 and the flat pad part 2, avoiding breakage due to large deformation at the connection between the body part 1 and the flat pad part 2, which would affect the overall sealing performance and service life of the sealing ring. This further improves the deformation resistance, sealing performance and ensures a long service life.

[0039] Furthermore, the main body 1 is provided with gasket parts 11 on both sides near the flat gasket part 2, and the opposite sides of the two gasket parts 11 are sealing planes, and the concave arc 10 is connected to the sealing plane through a chamfer 9.

[0040] As can be seen from the above description, by setting a sealing plane and combining it with the flat gasket 2, the contact surface of the sealing ring is increased to disperse pressure and improve support. At the same time, the sealing planes on both sides of the body part 1 are used to limit the lateral deformation of the body part 1 on both sides of the axial direction, further improving the overall pressure resistance and service life of the sealing ring.

[0041] Furthermore, the compressive elastic force of the outer rubber ring layer 5 is greater than or equal to the compressive elastic force of the inner rubber ring layer 3.

[0042] As can be seen from the above description, the compressive elastic force of the outer rubber ring layer 5 is greater than or equal to the compressive elastic force of the inner rubber ring layer 3. When the sealing ring is squeezed by the same external force, the amount of compression deformation of the outer rubber ring layer 5 is less than or equal to that of the inner rubber ring layer 3, thus ensuring the overall resistance to deformation.

[0043] Furthermore, the compressive elasticity of the outer rubber ring layer 5 is less than that of the inner rubber ring layer 3.

[0044] As can be seen from the above description, the compressive elastic force of the outer rubber ring layer 5 is less than that of the inner rubber ring layer 3. When the sealing ring is squeezed by the same external force, the inner rubber ring layer 3 has a stronger supporting effect on the outer rubber ring layer 5 and the first intermediate reinforcing layer 4. This further ensures the overall anti-deformation ability while ensuring the tightness of the fit between the outer surface of the body part 1 and the extrusion end face, and that the outer surface of the body part 1 has better elastic recovery force.

[0045] Reference Figures 2 to 4 The first embodiment provided by this utility model is as follows:

[0046] An anti-deformation sealing ring includes a body portion 1 and a flat washer portion 2, both of which are annular. The cross-section of the body portion 1 is arranged in an arc shape, and the cross-section of the flat washer portion 2 is arranged in a rectangle. The flat washer portion 2 is arranged coaxially with the body portion 1 and is integrally formed with the body portion 1. The chord side of the body portion 1 is an annular plane that matches the flat washer portion 2. The flat washer portion 2 is located on the radial side or the axial side of the body portion 1.

[0047] One side of the main body 1 is provided with an annular plane that matches the flat pad 2; the side of the main body 1 near the flat pad 2 is provided with a chamfer 9, and a concave arc 10 is provided between the chamfer 9 and the flat pad 2, which is concave towards the main body 1. The narrow end of the chamfer 9 is connected to the flat pad 2 through the concave arc 10.

[0048] The main body 1 includes an inner rubber ring layer 3, a first intermediate reinforcing ring layer 4, and an outer rubber ring layer 5 arranged sequentially from the inside to the outside. The pressure resistance of the inner rubber ring layer 3 and the outer rubber ring layer 5 is lower than that of the first intermediate reinforcing ring layer 4. The compressive elasticity of the rubber ring layer 5 is greater than, equal to, or less than that of the inner rubber ring layer 3. The outer rubber ring layer 5 and the inner rubber ring layer 3 can be made of materials such as chloroprene rubber, ethylene propylene rubber, and silicone rubber.

[0049] Example 2 differs from Example 1 in that, as Figure 5 and Figure 6 As shown, the main body 1 has gasket parts 11 on both sides near the flat gasket part 2. The opposite sides of the two gasket parts 11 are sealing planes, and the concave arc 10 is connected to the sealing plane by a chamfer 9. Figure 5 and Figure 6 Taking the flat pad 2 located on the radial inner side of the body part 1 as an example, the same structure is provided when the flat pad 2 is located on the radial outer side, the axial upper side, or the lower side of the body part 1.

[0050] Example 3 differs from Examples 1 and 2 in that, as follows: Figure 7As shown, the flat pad 2 is provided with a second intermediate reinforcing ring layer 6. The cross-section of the second intermediate reinforcing ring layer 6 is rectangular. A compression clearance area 8 is provided between the radial inner side of the first intermediate reinforcing ring layer 4 and the radial outer side adjacent to the second intermediate reinforcing ring layer 6. Both the first intermediate reinforcing ring layer 4 and the second intermediate reinforcing ring layer 6 are made of elastic metal, organic fiber, or inorganic fiber materials, such as stainless steel, aramid, or glass fiber. Stainless steel has the characteristics of high elasticity, not easy to break, and reusability, which can ensure that the overall sealing ring is not easily deformed and avoid the occurrence of overall sealing ring breakage, thereby improving the structural strength of the overall sealing ring. It is not limited to the above materials. Any other material that can improve the overall strength of the sealing ring and effectively ensure that the sealing ring body is not easily deformed or broken is acceptable. Figure 6 Taking the flat pad 2 located on the radial inner side of the body part 1 as an example, the same structure is provided when the flat pad 2 is located on the radial outer side, the axial upper side, or the lower side of the body part 1.

[0051] Example 4 differs from Example 3 in that, as Figure 8 As shown, the flat pad 2 is provided with a second intermediate reinforcing ring layer 6; the second intermediate reinforcing ring layer 6 and the first intermediate reinforcing ring layer 4 are integrally formed and interconnected; Figure 7 Taking the flat pad 2 located on the radial inner side of the body part 1 as an example, the same structure is provided when the flat pad 2 is located on the radial outer side, the axial upper side, or the lower side of the body part 1.

[0052] In summary, compared with the prior art, this utility model has the advantages of good sealing performance, high resistance to deformation, and long service life. During installation, the curved surface of the main body 1, with a cross-section in the shape of a superior arc, contacts the external extrusion end face, and the flat pad 2, with a rectangular cross-section, contacts the sealed element or sealing groove on the side away from the chord edge of the main body 1. By combining the integrally formed main body 1 and flat pad 2, the contact surface between the sealing ring and the sealed element or sealing groove is increased. This contact surface evenly distributes the pressure, ensuring the sealing effect of the sealing ring, enhancing the overall strength and durability of the sealing ring, and extending its service life. A [further details about the design and installation are needed]. The first intermediate reinforcing ring layer 4 is placed to ensure that the sealing ring has good elastic recovery ability, while supporting the outer rubber ring layer 5, further enhancing the strength of the sealing ring and the resistance to deformation of the axial side of the body part 1, avoiding the sealing ring from breaking and extending its service life. By setting the annular plane and the cross-section of the body part 1 to be in a superior arc shape, it is ensured that the flat gasket 2 can form appropriate compression in the chord direction of the cross-section of the body part 1, thereby providing a better sealing effect during installation. At the same time, it avoids unnecessary gaps between the body part 1 and the flat gasket 2, which helps to evenly distribute the contact pressure generated by the flat gasket 2, reduce local stress concentration, and extend the service life.

[0053] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A deformation-resistant sealing ring, characterized in that: The device includes a ring-shaped body portion and a flat pad portion. The cross-section of the body portion is arranged in an arc shape, and the cross-section of the flat pad portion is arranged in a rectangle. The flat pad portion and the body portion are arranged on the same axis and are integrally formed. The chord side of the body portion is an annular plane that matches the flat pad portion. The body portion includes an inner rubber ring layer, a first intermediate reinforcing ring layer, and an outer rubber ring layer arranged sequentially from the inside to the outside. The pressure resistance of the inner rubber ring layer and the outer rubber ring layer is lower than that of the first intermediate reinforcing ring layer.

2. The anti-deformation sealing ring according to claim 1, characterized in that: The flat pad is located on the radial side or the axial side of the body.

3. The anti-deformation sealing ring according to claim 1, characterized in that: The flat pad portion is provided with a second intermediate reinforcing ring layer, the cross-section of the second intermediate reinforcing ring layer is rectangular, and a compression clearance area is provided between the first intermediate reinforcing ring layer and the second intermediate reinforcing ring layer.

4. The anti-deformation sealing ring according to claim 1, characterized in that: The flat pad portion is provided with a second intermediate reinforcing ring layer; the second intermediate reinforcing ring layer and the first intermediate reinforcing ring layer are integrally formed and interconnected.

5. A deformation-resistant sealing ring according to claim 3 or 4, characterized in that: Both the first intermediate reinforcing ring layer and the second intermediate reinforcing ring layer are made of elastic metal or organic fiber material.

6. The anti-deformation sealing ring according to claim 1, characterized in that: The main body has a chamfer on the side near the flat pad, and a concave arc is provided between the chamfer and the flat pad, which is concave inward towards the main body. The narrow end of the chamfer and the flat pad are connected by the concave arc.

7. The anti-deformation sealing ring according to claim 6, characterized in that: The main body is provided with gaskets on both axial sides near the flat gasket. The two opposite sides between the two gaskets are sealing planes. The concave arc and the sealing plane are connected by the chamfer transition.

8. The anti-deformation sealing ring according to claim 1, characterized in that: The compressive elastic force of the outer rubber ring layer is greater than or equal to the compressive elastic force of the inner rubber ring layer.

9. The anti-deformation sealing ring according to claim 1, characterized in that: The compressive elasticity of the outer rubber ring layer is less than that of the inner rubber ring layer.

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