A high temperature high pressure seal

Abstract

This utility model discloses a high-temperature and high-pressure sealing component, belonging to the field of sealing components. It includes a flexible sealing layer and a rigid support layer coaxially arranged from the inside to the outside. Both the flexible sealing layer and the rigid support layer are annular structures. The inner wall of the rigid support layer has an installation groove. The outer peripheral surface of the flexible sealing layer is interference-fitted with the inner peripheral surface of the installation groove. The rigid support layer includes a coaxially arranged annular portion and a flange portion extending radially inward from one end face of the annular portion. A protrusion is fixedly connected to the upper end of the flange portion. The key technical point is that by setting the inner flexible sealing layer and the outer rigid support layer, the flexible sealing layer provides the main sealing function, while the rigid support layer not only provides strong back support for the flexible sealing layer, effectively preventing it from being squeezed into the sealing gap under high pressure, but also provides additional axial restraint through the L-shaped structure, especially the flange portion, further enhancing the anti-extrusion capability.

Description

Technical Field

[0001] This utility model relates to the field of sealing components, and in particular to a high-temperature and high-pressure sealing component. Background Technology

[0002] In industries such as petrochemicals, energy and power, and aerospace, a large number of equipment and pipeline systems need to operate under harsh conditions of high temperature and high pressure. As a key component to ensure the sealing performance of the system, the reliability of the seals is directly related to the safety and efficiency of the entire system. Traditional seals, such as ordinary O-rings, are prone to material aging, hardening, and permanent deformation in high-temperature environments, leading to seal failure. In high-pressure environments, they are easily squeezed into the sealing gap, causing damage to the sealing structure and leakage. Although there are some seals using metal or composite materials in the existing technology, their structures are often complex and the manufacturing cost is high. Or, under thermal cycling conditions, stress concentration may occur due to the mismatch of the thermal expansion coefficients of various components, affecting the sealing effect and service life. Therefore, we propose a high-temperature and high-pressure sealing component. Utility Model Content

[0003] To overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a high-temperature and high-pressure sealing component. By setting an internal flexible sealing layer and an external rigid support layer, the flexible sealing layer provides the main sealing function, while the rigid support layer not only provides strong back support for the flexible sealing layer, effectively preventing it from being squeezed into the sealing gap under high pressure, but also the L-shaped structure, especially the flange portion, provides additional axial restraint, further enhancing the anti-extrusion capability.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A high-temperature and high-pressure sealing component includes a flexible sealing layer and a rigid support layer coaxially arranged from the inside to the outside. Both the flexible sealing layer and the rigid support layer are annular structures. The inner wall of the rigid support layer has an installation groove. The outer peripheral surface of the flexible sealing layer is interference-fitted with the inner peripheral surface of the installation groove. The rigid support layer includes a coaxially arranged annular portion and a flange portion extending radially inward from one end face of the annular portion. A protrusion is fixedly connected to the upper end of the flange portion. An annular groove is formed at the lower end of the flexible sealing layer.

[0005] By setting an internal flexible sealing layer and an external rigid support layer, the flexible sealing layer provides the main sealing function, while the rigid support layer not only provides strong back support for the flexible sealing layer, effectively preventing it from being squeezed into the sealing gap under high pressure, but the L-shaped structure, especially the flange, also provides additional axial restraint, further enhancing the anti-extrusion capability. The separate design of the flexible sealing layer and the rigid support layer allows for relatively small displacements between the two due to their different coefficients of thermal expansion at high temperatures, preventing damage to the overall structure due to thermal stress and improving reliability under thermal cycling conditions. The overall structure is simple and compact, easy to process and install, and the auxiliary sealing ring on the rigid support layer can enhance the static sealing effect between it and the installation cavity.

[0006] Furthermore, the axial cross-section of the rigid support layer is L-shaped, and the protrusion has a stepped annular structure.

[0007] Furthermore, the annular groove is adapted to the protrusion, and the annular groove is engaged with the protrusion.

[0008] Furthermore, an annular groove 2 is provided at the upper end of the rigid support layer, and an auxiliary sealing ring is fixedly connected inside the annular groove 2.

[0009] Furthermore, a flow channel is provided at the upper end of the rigid support layer, and the flow channel has an L-shaped structure.

[0010] Furthermore, the end of the flow channel extends to the junction of the rigid support layer and the flexible sealing layer.

[0011] Furthermore, the upper end of the flow channel is threaded with a sealing plug, which has a T-shaped structure.

[0012] In summary, this utility model has the following beneficial effects: 1. By setting an internal flexible sealing layer and an external rigid support layer, the flexible sealing layer provides the main sealing function, while the rigid support layer not only provides strong back support for the flexible sealing layer, effectively preventing it from being squeezed into the sealing gap under high pressure, but the L-shaped structure, especially the flange part, also provides additional axial restraint, further enhancing the anti-extrusion capability. 2. The separate design of the flexible sealing layer and the rigid support layer allows for relatively small displacements between the two due to their different coefficients of thermal expansion at high temperatures, avoiding damage to the overall structure due to thermal stress and improving reliability under thermal cycling conditions. 3. The overall structure is simple and compact, easy to process and install, and the auxiliary sealing ring on the rigid support layer can enhance the static sealing effect between it and the installation cavity. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure in this embodiment; Figure 2 This is a schematic diagram of the split structure in this embodiment; Figure 3 This is a cross-sectional structural diagram in this embodiment; Figure 4 This is a schematic diagram of the structure viewed from below in this embodiment; Figure 5 This is a schematic diagram of the structure viewed from below in this embodiment.

[0014] In the figure, 1 is the flexible sealing layer; 2 is the rigid support layer; 21 is the annular part; 22 is the flange part; 3 is the mounting groove; 4 is the protrusion; 5 is the annular groove one; 6 is the annular groove two; 7 is the auxiliary sealing ring; 8 is the flow guiding channel; and 9 is the sealing plug. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings.

[0016] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific part, respectively.

[0017] Reference Figures 1-5 As shown, a high-temperature and high-pressure sealing component in a preferred embodiment of this utility model includes a flexible sealing layer 1 and a rigid support layer 2 coaxially arranged from the inside to the outside. Both the flexible sealing layer 1 and the rigid support layer 2 are annular structures. The inner wall of the rigid support layer 2 is provided with an installation groove 3. The outer peripheral surface of the flexible sealing layer 1 is interference-fitted with the inner peripheral surface of the installation groove 3. The rigid support layer 2 includes a coaxially arranged annular portion 21 and a flange portion 22 extending radially inward from one end face of the annular portion 21. A protrusion 4 is fixedly connected to the upper end of the flange portion 22. An annular groove 5 is provided at the lower end of the flexible sealing layer 1.

[0018] By setting an internal flexible sealing layer 1 and an external rigid support layer 2, the flexible sealing layer 1 provides the main sealing function, while the rigid support layer 2 not only provides strong back support for the flexible sealing layer 1, effectively preventing it from being squeezed into the sealing gap under high pressure, but the L-shaped structure, especially the flange 22, also provides additional axial restraint, further enhancing the anti-extrusion capability. The flexible sealing layer 1 and the rigid support layer 2 are designed separately, which allows for relatively small displacement between the two due to their different coefficients of thermal expansion at high temperatures. This avoids damage to the overall structure due to thermal stress and improves reliability under thermal cycling conditions. The overall structure is simple and compact, easy to process and install, and the auxiliary sealing ring 7 on the rigid support layer 2 can enhance the static sealing effect between it and the installation cavity.

[0019] Reference Figures 1-5 As shown, the axial cross-section of the rigid support layer 2 is L-shaped, and the protrusion 4 has a stepped annular structure.

[0020] Reference Figures 1-5 As shown, the annular slot 5 is adapted to the protrusion 4, and the annular slot 5 and the protrusion 4 are engaged and connected.

[0021] Reference Figures 1-5 As shown, an annular groove 6 is provided at the upper end of the rigid support layer 2, and an auxiliary sealing ring 7 is fixedly connected inside the annular groove 6.

[0022] Reference Figures 1-5 As shown, a flow channel 8 is provided at the upper end of the rigid support layer 2, and the flow channel 8 has an L-shaped structure.

[0023] Reference Figures 1-5 As shown, the end of the flow channel 8 extends to the junction of the rigid support layer 2 and the flexible sealing layer 1.

[0024] Reference Figures 1-5 As shown, the upper end of the flow channel 8 is threaded with a sealing plug 9, which has a T-shaped structure.

[0025] By setting up the flow channel 8 and unscrewing the sealing plug 9, lubricating oil can be injected into the mating area between the rigid support layer 2 and the flexible sealing layer 1 through the flow channel 8. This forms an oil film between the flexible sealing layer 1 (such as a high-temperature resistant elastic material, such as perfluoroelastomer, fluororubber, or silicone rubber) and the rigid support layer 2 (such as metal or high-temperature resistant engineering plastic), directly reducing the frictional loss of the seal during start-up, vibration, or minor displacement, and extending the service life of the seal. For equipment with start-stop functionality, the sealing surface may wear due to microscopic adhesion when starting after a long period of stillness. Pre-injecting lubricating oil ensures a smooth start-up and avoids severe wear in the initial stage.

[0026] Specific implementation process: By setting an internal flexible sealing layer 1 and an external rigid support layer 2, the flexible sealing layer 1 provides the main sealing function, while the rigid support layer 2 not only provides strong back support for the flexible sealing layer 1, effectively preventing it from being squeezed into the sealing gap under high pressure, but the L-shaped structure, especially the flange 22, also provides additional axial restraint, further enhancing the anti-extrusion capability. The flexible sealing layer 1 and the rigid support layer 2 are designed separately, which allows for relatively small displacement between the two due to their different coefficients of thermal expansion at high temperatures. This avoids damage to the overall structure due to thermal stress and improves reliability under thermal cycling conditions. By unscrewing the sealing plug 9, lubricating oil can be injected into the mating area between the rigid support layer 2 and the flexible sealing layer 1 through the flow channel 8. This forms an oil film between the flexible sealing layer 1 (such as a high-temperature resistant elastic material, such as perfluoroelastomer, fluororubber, or silicone rubber) and the rigid support layer 2 (such as metal or high-temperature resistant engineering plastic), directly reducing frictional losses during start-up, vibration, or minor displacement, and extending the service life of the seal. For equipment with start-stop cycles, the sealing surface may wear due to microscopic adhesion when starting after a long period of stillness. Pre-injecting lubricating oil ensures a smooth start-up and avoids severe wear in the initial stage.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-temperature and high-pressure sealing component, characterized in that: It includes a flexible sealing layer (1) and a rigid support layer (2) arranged coaxially from the inside to the outside. Both the flexible sealing layer (1) and the rigid support layer (2) are annular structures. The inner wall of the rigid support layer (2) is provided with an installation groove (3). The outer peripheral surface of the flexible sealing layer (1) is interference-fitted with the inner peripheral surface of the installation groove (3). The rigid support layer (2) includes a coaxially arranged annular part (21) and a flange part (22) extending radially inward from one end face of the annular part (21). A protrusion (4) is fixedly connected to the upper end of the flange part (22). An annular groove (5) is provided at the lower end of the flexible sealing layer (1).

2. The high-temperature and high-pressure sealing component according to claim 1, characterized in that: The rigid support layer (2) has an L-shaped axial cross section, and the protrusion (4) has a stepped annular structure.

3. A high-temperature and high-pressure sealing component according to claim 1, characterized in that: The annular slot (5) is adapted to the protrusion (4), and the annular slot (5) and the protrusion (4) are engaged and connected.

4. A high-temperature and high-pressure sealing component according to claim 1, characterized in that: The upper end of the rigid support layer (2) is provided with an annular groove 2 (6), and an auxiliary sealing ring (7) is fixedly connected inside the annular groove 2 (6).

5. A high-temperature and high-pressure sealing component according to claim 1, characterized in that: The upper end of the rigid support layer (2) is provided with a flow channel (8), which has an L-shaped structure.

6. A high-temperature and high-pressure sealing component according to claim 5, characterized in that: The end of the flow channel (8) extends to the junction of the rigid support layer (2) and the flexible sealing layer (1).

7. A high-temperature and high-pressure sealing component according to claim 6, characterized in that: The upper end of the flow channel (8) is threaded with a sealing plug (9), which has a T-shaped structure.

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