An anti-overcompression sealing assembly and sealing structure

Abstract

This invention discloses an overcompression-resistant sealing assembly, comprising: a gap seal, disposed at the mating gap of an installation component to seal the mating gap; a limiting support, disposed at the mating gap of the installation component to limit and protect the gap seal from overcompression; the limiting support has a seal mounting groove and a mounting hole; and an elastic floating member, disposed inside the mounting hole of the limiting support and connected to the mating component, for floating support of the limiting support; during installation, a supporting gap is formed between the limiting support and the installation component, the gap seal is in a compressed sealing state, and the elastic floating member is in a natural state. An overpressure-resistant sealing structure is also disclosed. This effectively prevents the sealing ring from failing due to overcompression, avoids unnecessary leakage, has good sealing performance, is safe and reliable, and has a simple structure and strong applicability, and can be widely used for axial and radial sealing.

Description

Technical Field

[0001] This invention relates to the field of gas turbine technology, and more specifically to an over-compression prevention sealing assembly and sealing structure for preventing over-compression of the sealing ring. Background Technology

[0002] There are many assembly gaps in gas turbines. Many assembly gaps can lead to leakage problems. Some gaps are located at the interface of high-temperature gas, and leakage of high-temperature gas is more dangerous and can seriously affect the safe operation of the unit.

[0003] Therefore, in order to prevent gap leakage, a sealing structure is usually set up. The sealing is achieved by installing a sealing ring on the gap sealing surface. The appropriate sealing ring is set according to the vibration, displacement and other conditions of the sealing position. For example, if the relative displacement is small during the operation of the unit, only ordinary sealing rings or sealing strips need to be set up and the sealing can be completed well by pre-tightening the bolts. For positions with large relative displacement and where it is not possible to install tightening bolts, it is necessary to set up elastic sealing ropes or W-type seals.

[0004] The problem with existing technical solutions is that if only a sealing groove is processed and a sealing rope or W-type seal is installed, the elastic seal needs a certain amount of compression during installation to ensure the initial sealing performance. When the gap between the two sealing surfaces becomes smaller, if the compression exceeds the compression limit of the elastic seal, the elastic seal will rebound poorly or even fail. This will cause the sealing ring to not rebound well or even fail to rebound when the gap between the sealing surfaces becomes larger, resulting in sealing failure and increased leakage. If a large amount of high-temperature gas leaks, it will cause serious consequences and may even cause a fire. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the prior art where sealing rings fail due to overcompression, resulting in increased leakage and affecting the operating efficiency and safety of the unit. The invention provides an overcompression-proof sealing component and an overpressure-proof sealing structure that can effectively prevent sealing rings from failing due to overcompression, with no leakage, good sealing performance, safety and reliability, and a simple structure.

[0006] The technical solution adopted by this invention to achieve its first objective is: an anti-overcompression sealing assembly, comprising:

[0007] Gap seals are installed at the mating gaps of mounting components to seal the mating gaps;

[0008] A limiting support is provided at the mating gap of the mounting components to limit the gap seal and protect it from overcompression; the limiting support is provided with a seal mounting groove and a mounting hole;

[0009] An elastic floating component is installed inside the mounting hole on the limiting support component and connected to the mating component to provide floating support for the limiting support component.

[0010] During installation, a support gap is formed between the limiting support and the mounting components. The gap seal is in a compressed sealing state, while the elastic floating component is in a natural supporting state.

[0011] This over-compression sealing assembly is designed to address the problem of high-temperature gas leakage caused by excessive compression of seals at the mating gaps of installed components during gas turbine operation, due to the pressure generated by the unit's operation. Specifically, the assembly includes a limiting support with a seal mounting groove. A gap seal is installed inside the groove to seal the mating gap. An installation hole is provided on the limiting support, and an elastic floating element is installed inside. This floating element provides floating support for the limiting support. During installation, a support gap is formed between the limiting support and the installed component. The gap seal is in a compressed sealing state, while the elastic floating element is in a naturally supported state. In its natural state, the elastic floating element supports the limiting support at the corresponding position on the component, while the gap seal, needing to seal the mating gap, is in a compressed sealing state. When the mating gap changes, the floating of the elastic floating element ensures that the gap seal remains sealed within the mating gap. Specifically, when the clearance increases, the compression of the clearance seal decreases, thus maintaining a seal with the clearance. When the clearance decreases, the clearance seal is further compressed into the seal mounting groove. Due to the action of the elastic floating element, the clearance seal and the clearance remain in a sealed fit. When the clearance seal is compressed to its maximum compression, it is pushed into the seal mounting groove and will not be compressed further. The end face of the limiting support contacts the end face of the component. At this point, the support gap between the limiting support and the mounting component is zero, and pressure is applied to the limiting support. The limiting support transmits the pressure to the elastic floating element, which is compressed. This ensures that the clearance seal remains sealed with the clearance without being over-compressed, thus preventing leakage in the clearance.

[0012] Preferably, the thickness of the gap seal in its natural state is greater than the sum of the depth of the seal mounting groove and the support gap. This structure ensures that the gap seal is in a compressed state after installation and remains sealed even when the clearance between components increases, thus guaranteeing a sealing effect.

[0013] Preferably, the compression force required to compress the elastic floating component is greater than the compression force required to compress the gap seal. To ensure that the mating gap remains sealed at all times, the compression force required to compress the elastic floating component is set to be greater than the compression force required to compress the gap seal. When the mating gap decreases, the gap seal is compressed and deformed first. At this time, the gap seal is still within the set deformation range, ensuring the effectiveness and sealing effect of the gap seal. When the mating gap decreases further, i.e., the external force of the unit increases, and when the reduction in gap exceeds the maximum deformation of the gap seal, the elastic floating component is compressed, thereby protecting the gap seal and preventing it from being further compressed, which could lead to the failure of the gap seal.

[0014] Preferably, the limiting support is a limiting support ring, which includes an opposing mounting ring surface and a limiting ring surface. The sealing groove is formed on the limiting ring surface, and the mounting holes are evenly distributed on the mounting ring surface. An annular sealing groove is provided on the outer ring surface of the limiting support ring, and an annular seal is provided inside the annular sealing groove. The limiting support is preferably a limiting support ring. The mounting ring surface is provided to facilitate mating with components in the unit, while the limiting ring surface is provided to ensure that when the mating clearance decreases and the clearance seal is compressed to its maximum compression, the limiting ring surface abuts against the mounting mating surface on the component, thus protecting the clearance seal and preventing further compression. The annular sealing groove and the annular seal are designed to achieve a floating dynamic sealing connection between the limiting support ring and the component.

[0015] Preferably, the limiting ring surface of the limiting support member has multiple annular protrusions evenly distributed. Alternatively, the limiting ring surface of the limiting support member can be provided with multiple annular protrusions. When the gap seal is compressed to its maximum compression, the annular protrusions first limit the fitting gap, ensuring that the compression of the gap seal is within the maximum compression range. When the fitting gap further decreases, the limiting support member is pushed towards the elastic floating member, thereby protecting the gap seal and preventing further compression.

[0016] Preferably, the elastic floating element includes a spring, or the elastic floating element includes a spring and a ball bearing, or the elastic floating element includes an elastic bladder. The elastic floating element can be a spring, a structure using a spring and a ball bearing, a high-temperature resistant elastic bladder, a high-temperature resistant elastic column, etc. Its main purpose is to protect the gap seal from over-compression when it exceeds its maximum compression capacity, as the elastic floating element compresses the seal. Any elastic element capable of supporting compression is acceptable.

[0017] Preferably, the gap seal includes a supporting sealing surface and a gap sealing surface, and the maximum compression of the gap seal is greater than the size of the supporting gap. The gap seal needs to seal the mating gap; therefore, both ends of the gap seal are sealing surfaces, and the supporting sealing surface and gap sealing surface are integrally formed. The gap seal can be configured with different structural shapes according to the actual situation of the mating gap; it can be a sealing ring, a sealing strip, a sealing rope, etc. The maximum compression of the gap seal is set to be greater than the size of the supporting gap. This design ensures that even when the supporting gap is zero, the gap seal remains within an effective deformation range and will not fail.

[0018] The technical solution adopted by this invention to achieve its second objective is: an overpressure-resistant sealing structure, which includes the aforementioned overcompression-resistant sealing component. This overpressure-resistant sealing structure, using the overcompression-resistant sealing component, reduces the probability of seals failing due to overcompression during unit operation, avoids unnecessary leakage, and improves the efficiency and safety of unit operation.

[0019] Preferably, the overcompression sealing assembly is installed at the mating gap formed by the mating of component one and component two. Component one has a mounting mating surface, and component two has a mounting mating surface. A floating groove is provided on the mounting mating surface of component one, and several floating component limiting grooves are provided at the bottom of the floating groove. The overcompression sealing assembly is disposed within the floating groove, and the gap sealing surface of the gap seal is sealed to the mounting mating surface of component two, while the supporting sealing surface is sealed to the mounting groove of the seal. The overcompression sealing assembly can be selectively positioned on the mounting mating surface of component one to achieve the overcompression sealing effect, depending on the component position at the mating gap and the installation requirements.

[0020] As another preferred embodiment, the overcompression prevention sealing assembly is installed at the mating gap formed by the mating of component one and component two. Component one has a component one mounting mating surface, and component two has a component two mounting mating surface. A floating groove is provided on the component two mounting mating surface, and several floating component limiting grooves are provided at the bottom of the floating groove. The overcompression prevention sealing assembly is disposed within the floating groove, and the gap sealing surface of the gap seal is sealed to the mounting mating surface of component one, while the supporting sealing surface is sealed to the sealing component mounting groove. Depending on the component position at the mating gap and installation requirements, the overcompression prevention sealing assembly can also be optionally installed on the mounting mating surface of component two to achieve the overpressure prevention sealing effect. Regardless of whether component one or component two is selected, this sealing structure can effectively prevent the seal from being overcompressed and failing, avoiding unnecessary leakage and improving the efficiency and safety of unit operation.

[0021] The beneficial effects of this invention are: the anti-overcompression sealing assembly and anti-overpressure sealing structure can effectively prevent the sealing ring from failing due to overcompression, avoid unnecessary leakage, have good sealing performance, be safe and reliable, and have a simple structure and strong applicability. They can be widely used for axial and radial sealing, especially suitable for mating gaps at the high-temperature gas interface, which can avoid the danger of high-temperature gas leakage and ensure the safe operation of the unit. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a structure of the anti-overcompression sealing component of the present invention;

[0023] Figure 2 This is a cross-sectional structural schematic diagram of the anti-overcompression sealing assembly of the present invention;

[0024] Figure 3 yes Figure 2 Enlarged view at point B in the middle;

[0025] Figure 4 This is a schematic diagram of one structure of the limiting support component in this invention;

[0026] Figure 5 This is a structural schematic diagram of another corner of the limiting support member of the present invention.

[0027] Figure 6 This is a schematic diagram of a sealing structure for preventing overcompression according to the present invention;

[0028] Figure 7 This is a cross-sectional view of the sealing structure for preventing overcompression according to the present invention;

[0029] Figure 8 yes Figure 7 Enlarged image of the Chinese D-film;

[0030] Figure 9 This is a diagram showing a usage state where the gap between the sealing structure preventing over-compression of the present invention increases;

[0031] Figure 10 This is a diagram showing a usage state where the gap between the sealing structure preventing over-compression of the present invention becomes smaller.

[0032] Figure 11 This is a diagram showing a usage state when the sealing structure of the present invention, which prevents over-compression, is compressed to its maximum value.

[0033] Figure 12 This is a schematic diagram of a structure of the anti-overcompression sealing assembly in Embodiment 2 of the present invention;

[0034] Figure 13 This is a schematic diagram of a sealing structure for preventing overcompression in Embodiment 2 of the present invention;

[0035] Figure 14 This is a schematic diagram of a limiting support component in Embodiment 3 of the present invention;

[0036] In the diagram: 1. Limiting support component; 101. Mounting ring surface; 102. Limiting ring surface; 2. Elastic floating component; 21. Spring; 22. Ball bearing; 3. Gap seal; 31. Support sealing surface; 32. Gap sealing surface; 4. Seal mounting groove; 5. Mounting hole; 6. Ring surface sealing groove; 7. Ring surface seal; 8. Component one; 81. Component one mounting mating surface; 9. Component two; 91. Component two mounting mating surface; 10. Floating groove; 11. Floating component limiting groove; 12. Ball bearing groove; 13. Supporting ring body; 14. Ring surface protrusion; C. Mating clearance; S. Support clearance; H. Depth; M. Thickness; F. Elastic force; F1. Compression force; F2. Gap seal compression force; F3. Component pressure. Detailed Implementation

[0037] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings.

[0038] Example 1:

[0039] exist Figure 1 , Figure 2 , Figure 3 In the illustrated embodiment, an overcompression-resistant sealing assembly includes a limiting support 1, several elastic floating members 2, and a gap seal 3. The limiting support 1 is used to install on any one of the components at the mating gap, thereby positioning the gap seal 3. The elastic floating members 2 are connected to the limiting support 1, enabling an elastic floating connection between the limiting support 1 and the component, thus achieving an elastic floating seal on the gap seal 3 and preventing overcompression failure. During installation, the overcompression-resistant sealing assembly is installed at the mating gap between two components. The size of the mating gap is set to C, the thickness of the gap seal in its natural state is M, and the maximum compression of the gap seal 3 is A. A support gap S is formed between the limiting support 1 and the mounting component. Under normal use, the gap seal is in a compressed sealing state, while the elastic floating members are in a natural supporting state.

[0040] The compression force F1 required to compress the elastic floating component is greater than the compression force F2 required to compress the gap seal. When the fit clearance decreases, the gap seal is first further compressed and deformed. At this time, the gap seal is still within the set deformation range, ensuring the effectiveness and sealing effect of the gap seal. When the fit clearance decreases further, that is, when the external force of the unit operation increases, and when the reduction in clearance exceeds the maximum deformation of the gap seal, the limiting support contacts the component and bears the external force. The elastic floating component is compressed, thereby protecting the gap seal and preventing it from being further compressed, which could lead to the failure of the gap seal.

[0041] like Figure 4 , Figure 5 As shown, the limiting support 1 is a limiting support ring. A sealing element mounting groove 4 is provided on one of the ring surfaces of the limiting support ring. Specifically, the limiting support 1 includes a mounting ring surface 101 and a limiting ring surface 102 that are arranged opposite to each other. The sealing element mounting groove 4 is opened on the limiting ring surface 102, and the mounting holes 5 are evenly distributed on the mounting ring surface 101.

[0042] The depth H of the sealing groove 4 is such that a gap seal 3 is provided inside the sealing groove 4. The thickness M of the gap seal 3 in its natural state is greater than the sum of the depth H of the sealing groove 4 and the support gap S between the limiting support and the component.

[0043] The gap seal 3 is used to seal the gap between the two mating parts. Several elastic floating element mounting holes 5 are provided on the mounting ring surface of the limiting support ring. The elastic floating element 2 includes a spring 21. The elastic floating element 2 is installed inside the elastic floating element mounting holes 5 and forms a uniformly stressed floating support structure on the ring surface of the limiting support 1. An annular sealing groove 6 is provided on the outer circumferential surface of the limiting support ring. To achieve a sealed connection between the limiting support ring and the parts, an annular sealing groove 6 is provided on the outer ring surface of the limiting support ring, and an annular seal 7 is provided inside the annular sealing groove 6.

[0044] The gap seal 3 includes a supporting sealing surface 31 and a gap sealing surface 32. The supporting sealing surface 31 cooperates with the seal mounting groove 4 to achieve the installation, positioning, and sealing of the gap seal, and the supporting sealing surface 31 and the gap sealing surface 32 together achieve the sealing of the mating gap. The maximum compression A of the gap seal 3 is greater than the gap size of the supporting gap S.

[0045] like Figure 6 , Figure 7 , Figure 8 As shown, an overpressure-resistant sealing structure includes a first component 8 and a second component 9. The first component 8 is provided with a first component mounting mating surface 81, and the second component is provided with a second component mounting mating surface 91. A mating gap C is formed between the first component mounting mating surface 81 and the second component mounting mating surface 91, and an overpressure-resistant sealing component is provided at the mating gap C.

[0046] A floating groove 10 is provided on the mounting mating surface 81 of component one or the mounting mating surface 91 of component two. In this embodiment, the floating groove 10 is provided on the mounting mating surface 81 of component one and is arranged in a ring groove structure. A plurality of floating member limiting grooves 11 are provided at the bottom of the floating groove 10 corresponding to the elastic floating member 2.

[0047] In use, the overcompression sealing assembly is installed inside the floating groove 10, and the elastic floating element 2 is positioned inside the floating element limiting groove 11. The other end of the elastic floating element 2 is limited inside the elastic floating element mounting hole 5 on the limiting support ring. The gap sealing surface 32 of the gap seal 3 is sealed with the mounting mating surface 91 of the second component, thereby forming a floating overcompression sealing structure.

[0048] Specifically, a mating gap C is formed at the mounting mating surface 81 of component one and the mounting mating surface 91 of component two. This gap C needs to be sealed to ensure the sealing performance and safety of the unit during operation. Therefore, a floating groove 10 is machined on component one, and several floating component limiting grooves 11 are uniformly machined inside the floating groove 10. The floating component limiting grooves 11 correspond one-to-one with the elastic floating component mounting holes 5 on the limiting support component. Elastic floating components 2 are installed in the floating component limiting grooves 11 and the elastic floating component mounting holes 2. In this embodiment, a spring is used as the elastic floating component, and an elastic sealing ring is used as the gap seal 3. The thickness of the elastic sealing ring in its natural state is M, which is greater than the sum of the depth H of the sealing component mounting groove on the limiting support ring and the support gap S between the limiting support ring and the mounting mating surface 91 of component two after assembly. The maximum compressibility of the elastic sealing ring is A. The maximum compressibility A of the elastic sealing ring is greater than the support gap S between the limiting ring surface 102 on the limiting support ring and the mounting mating surface 91 of component two. The elastic sealing ring is installed in the sealing installation groove 4. An annular sealing element 7 is provided inside the annular sealing groove 6. The annular sealing element 7 is a sealing strip. The sealing strip is sealed and fitted with the groove wall of the floating groove 10 on component one. The elastic sealing ring is in sealing contact with the mounting mating surface 91 of component two and is in a compressed state to form a seal.

[0049] The spring compression force F1 required to compress spring 21 must be greater than the gap sealing force F2 required to compress the elastic sealing ring, i.e., the elastic sealing ring compression force. This is to ensure the elastic sealing ring is compressed first to meet the sealing requirements. The elastic sealing ring's thickness in its natural state is M, which is greater than the sum of the depth H of the sealing groove on the limiting support ring and the support gap S between the limiting support ring and the mounting mating surface 91 of component two after assembly. This ensures that the elastic sealing ring is in a compressed state after installation and maintains a seal even when the mating gap C between component one and component two increases. The depth H of the sealing groove on the limiting support ring represents the compression state of the elastic sealing ring during unit operation, which is also the maximum compression state. That is, the maximum compressible amount of the elastic sealing ring is A. When the elastic sealing ring is further compressed to the maximum compression amount A, the spring 21 inside the sealing groove of the limiting support ring is compressed. At this time, the limiting ring surface 102 with the sealing groove of the limiting support ring contacts the mounting mating surface 91 of component two, protecting the elastic sealing ring and preventing further compression.

[0050] During use, such as Figure 9As shown, when the mating gap C between the mounting mating surface 81 of component one and the mounting mating surface 52 of component two increases, due to the elastic force of the elastic sealing ring, the elastic sealing ring is always in close contact with the mounting mating surface 91 of component two, thus always protecting the sealing performance.

[0051] like Figure 10 As shown, when the mating gap C between the mounting mating surface 81 of component one and the mounting mating surface 91 of component two decreases, the elastic sealing ring is further compressed due to the component pressure F3 between the components, causing the elastic sealing ring to adhere tightly to the mounting mating surface 91 of component two, thus achieving a sealing effect. When the mating gap C between the mounting mating surface 81 of component one and the mounting mating surface 91 of component two continues to decrease, that is, when the component pressure F3 between component one and component two increases to the gap seal compression force F2, the elastic sealing ring is compressed into the sealing element mounting groove 4 of the limiting support ring. At this time, the limiting ring surface 102 of the limiting support ring, which has the sealing element mounting groove 4, contacts the mounting mating surface 91 of component two, and the elastic sealing ring is protected. At this time, the elastic sealing ring and the mounting mating surface 91 of component two are always in contact, maintaining a sealed state.

[0052] like Figure 11 As shown, when the component pressure F3 between the mounting mating surface 81 of component one and the mounting mating surface 91 of component two is greater than the required compression force F2 of the elastic sealing ring, the limiting support ring is compressed into the interior of component one 8. When the component pressure F3 is greater than the required compression force F1 of spring 21, spring 21 is compressed. At this time, the elastic sealing ring is compressed inside the sealing groove and is within the range of maximum compression. The elastic sealing ring and the mounting mating surface 91 of component two remain in a sealed state, thereby achieving good sealing performance.

[0053] When the component pressure F3 is greater than the spring compression force F1, the spring 21 is further compressed, and the limiting support ring is further pressed into the floating groove 10. At this time, the gap sealing surface of the gap seal and the limiting ring surface of the limiting support ring are in contact with the mounting mating surface of component 2, thus achieving a seal. At this time, the gap seal is not over-compressed due to the protection of the limiting support ring.

[0054] The anti-overcompression sealing component ensures that the mating gap C between the mounting mating surface 81 of component one and the mounting mating surface 91 of component two is always sealed, and the elastic sealing ring is always in an effective state and will not fail due to overcompression.

[0055] Example 2:

[0056] exist Figure 12 , Figure 13In the illustrated embodiment, an over-compression sealing assembly is provided. The technical solution of this embodiment is basically the same as that of Embodiment 1, except that the elastic floating element includes a spring 21 and a ball bearing 22, and the gap seal uses an elastic sealing strip. In this embodiment, spring 21 and ball bearing 22 are used as the elastic floating element. Since the force on the mating gap during unit operation may be uneven, to ensure that the gap seal is evenly stressed during the sealing process, thereby ensuring that the entire gap sealing surface can effectively seal, the ball bearing is used to adjust the direction of force, thus ensuring uniform force distribution. The spring compression force F1 required to compress the spring must be greater than the gap seal compression force F2 required to compress the elastic sealing strip. This is to ensure that the elastic sealing strip is compressed first to meet the sealing requirements.

[0057] The limiting support is a limiting support ring. A sealing element mounting groove is provided on the limiting ring surface 102 of the limiting support ring. The depth of the sealing element mounting groove is H. A gap seal is provided inside the sealing element mounting groove. This gap seal is used to seal the mating gap C between the two mating parts. Several elastic floating element mounting holes 5 are provided on the mounting ring surface 101 of the limiting support ring, such as... Figure 12 As shown, a ball groove 12 is provided inside the elastic floating component mounting hole 5, and the ball 22 is disposed in the ball groove 12. One end of the spring 21 is pressed on the ball 22, and the other end of the spring 21 is limited inside the floating component limiting groove 11.

[0058] like Figure 13 As shown, in this example, the overpressure protection sealing structure has a floating groove 10 located on the mounting surface 91 of component two, and is arranged in an annular groove structure. Several floating component limiting grooves are provided at the bottom of the floating groove corresponding to the elastic floating component.

[0059] Specifically, a mating gap C is formed at the mounting mating surface 81 of component one and the mounting mating surface 91 of component two. This gap C needs to be sealed to ensure the sealing performance and safety of the unit during operation. Therefore, a floating groove 10 is machined on component two 9, and several floating component limiting grooves 11 are uniformly machined inside the floating groove 10. The floating component limiting grooves 11 correspond one-to-one with the elastic floating component mounting holes 5 on the limiting support component. Elastic floating components 2 are installed in the floating component limiting grooves 11 and the elastic floating component mounting holes 2. In this embodiment, the gap seal 3 is an elastic sealing strip. The thickness of the elastic sealing strip in its natural state is M, which is greater than the sum of the depth H of the sealing groove on the limiting support ring and the support gap S between the limiting support ring and the mounting mating surface 81 of component two after assembly. The maximum compressibility of the elastic sealing strip is A. The maximum compressibility A of the elastic sealing strip is greater than the support gap S between the limiting ring surface 102 on the limiting support ring and the mounting mating surface 81 of component one. The elastic sealing strip is installed in the sealing installation groove 4. An annular sealing element 7 is provided inside the annular sealing groove 6. The annular sealing element 7 is an O-ring. The O-ring is sealed and fitted with the groove wall of the floating groove 10 on component 2. The elastic sealing strip is in sealing contact with the mounting mating surface 81 of component 1 and is in a compressed state to form a seal.

[0060] During use, when the mating gap C between the mounting mating surface 81 of component one and the mounting mating surface 91 of component two increases, the elastic sealing strip will always be in close contact with the mounting mating surface 81 of component one and the mounting mating surface 91 of component two due to the elastic force F of the elastic sealing strip, thus always protecting the sealing performance.

[0061] When the mating gap C between the mounting mating surface 81 of component one and the mounting mating surface 91 of component two decreases, the elastic sealing strip is compressed by the component pressure F3 between the components, causing the elastic sealing strip to adhere tightly to the mounting mating surface 81 of component one, thus achieving a sealing effect. When the mating gap C between the mounting mating surface 81 of component one and the mounting mating surface 91 of component two continues to decrease, that is, when the component pressure F3 between component one and component two increases to the required gap sealing compression force F2 of the elastic sealing strip, the elastic sealing strip is compressed into the sealing element mounting groove 4 of the limiting support ring. At this time, the limiting ring surface 102 of the limiting support ring, which has the sealing element mounting groove 4, contacts the mounting mating surface 91 of component two, and the elastic sealing strip is protected. At this time, the elastic sealing strip and the mounting mating surface 81 of component one are always in contact, maintaining a sealed state.

[0062] When the component pressure F3 between the mounting mating surface 81 of component one and the mounting mating surface 91 of component two is greater than the required compression force F2 of the elastic sealing ring, the limiting support ring is compressed into the floating groove 10 of component one. When the component pressure F3 is greater than the required compression force F1 of spring 21, spring 21 is compressed. At this time, the elastic sealing strip and the mounting mating surface 81 of component one remain in a sealed state, thereby achieving good sealing performance.

[0063] When the component pressure F3 exceeds the spring compression force F1, the spring 21 is compressed. At this time, the limiting support ring continues to be pressed into the floating groove 10. Simultaneously, the gap sealing surface 32 of the elastic sealing strip and the limiting ring surface of the limiting support ring contact the component's mounting mating surface 81, achieving a seal. Because of the protection of the limiting support ring, the elastic sealing strip is not over-compressed. During use, the elastic sealing strip remains effective and will not fail due to over-compression.

[0064] Example 3:

[0065] exist Figure 14 In the illustrated embodiment, the technical solution is basically the same as that in Embodiment 1, except that: the limiting support member 1 includes a supporting ring body 13 and a plurality of annular protrusions 14 evenly distributed on the annular surface of the supporting ring body on the side where the sealing element mounting groove is provided. The annular protrusions 14 are evenly distributed on the limiting annular surface 102 of the limiting support member.

[0066] The usage process is basically the same as in Examples 1 and 2, except that: when the mating gap C between the mounting mating surface 81 of component one and the mounting mating surface 91 of component two continues to decrease, that is, when the component pressure F3 between component one and component two increases to the required compression force F2 of the gap seal, the gap seal is compressed into the sealing groove of the limiting support ring. At this time, the annular protrusion 14 on the limiting support ring contacts the mounting mating surface of component one or component two, and the gap seal is protected. At this time, the gap seal is always in contact with the mounting mating surface of component one or component two to maintain a sealed state.

[0067] The technical solutions described in the above embodiments are also applicable to radial sealing. The gap seal can be any shape of elastic seal to achieve a seal, and its shape is designed according to the sealing requirements of the mating gap. The elastic floating element can also be any component capable of floating, such as a high-temperature resistant elastic column or a high-temperature elastic spherical structure. The elastic spherical structure is filled with a medium gas or liquid. When uncompressed, the filling medium inside supports the limiting support. When compressed, the spherical structure is compressed and deformed, causing the limiting support to move into the floating groove. Since the compressive force required to compress the elastic floating element is greater than the compressive force required to compress the gap seal, when the gap seal is compressed to its maximum compression, it will be protected inside the seal mounting groove. Simultaneously, the gap seal and the mating gap remain in a sealed state.

[0068] This anti-overcompression sealing assembly and sealing structure is simple and easy to implement. It solves the problem of sealing failure caused by overcompression of the sealing element by a combination of a set of elastic floating parts 2, limiting support parts 1 and gap sealing parts 3.

[0069] It should be noted that the embodiments described above are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its scope, and all such changes and modifications fall within the scope of the claimed invention. Based on the embodiments described in this invention, all other embodiments obtained by those skilled in the art without inventive effort and based on the technical solutions of this application should fall within the scope of protection of this invention.

Claims

1. An over-compression prevention seal assembly, comprising include: A gap seal (3) is provided at the mating gap of the mounting components to achieve a seal on the mating gap (C); The limiting support (1) is set at the mating gap (C) of the mounting components to limit and over-compression the gap seal (3); the limiting support (1) is provided with a seal mounting groove (4) and a mounting hole (5); The elastic floating component (2) is set inside the mounting hole (5) on the limiting support component and connected to the mating component, and is used for floating support of the limiting support component (1); During installation, a support gap (S) is formed between the limiting support (1) and the installation component, the gap seal is in a compressed sealing state, and the elastic floating component is in a natural support state. The compressive force (F1) required to compress the elastic floating element is greater than the compressive force (F2) required to compress the gap seal element.

2. The over-compression prevention seal assembly of claim 1, wherein: The thickness (M) of the gap seal (3) in its natural state is greater than the sum of the depth (H) of the seal mounting groove (4) and the support gap (S).

3. An over-compression preventing seal assembly according to any one of claims 1 to 2, wherein: The limiting support member (1) is a limiting support ring. The limiting support member (1) includes an installation ring surface (101) and a limiting ring surface (102) arranged opposite to each other. The sealing installation groove (4) is opened on the limiting ring surface (102). The installation holes (5) are evenly distributed on the installation ring surface (101). A ring sealing groove (6) is provided on the outer ring surface of the limiting support ring. A ring sealing member (7) is provided inside the ring sealing groove.

4. The over-compression prevention seal assembly of claim 3, wherein: The limiting support member has multiple annular protrusions (14) evenly distributed on the limiting annular surface (102).

5. The over-compression preventing seal assembly of any one of claims 1 to 2, wherein: The elastic floating element (2) includes a spring (21), or the elastic floating element (2) includes a spring (21) and a ball (22), or the elastic floating element includes an elastic balloon.

6. The anti-overcompression sealing assembly according to any one of claims 1 to 2, characterized in that: The gap seal (3) includes a support sealing surface (31) and a gap sealing surface (32), and the maximum compression (A) of the gap seal (3) is greater than the gap size of the support gap (S).

7. An overpressure-resistant sealing structure, characterized in that: The sealing structure includes the over-compression sealing assembly as described in any one of claims 1 to 6.

8. The overpressure-resistant sealing structure according to claim 7, characterized in that: The anti-overcompression sealing assembly is installed at the mating gap (C) formed by the mating of component one (8) and component two (9). Component one (8) is provided with a component one mounting mating surface (81), and component two (9) is provided with a component two mounting mating surface (91). A floating groove (10) is provided on the component one mounting mating surface (81), and a plurality of floating component limiting grooves (11) are provided at the bottom of the floating groove (10). The anti-overcompression sealing assembly is set in the floating groove, and the gap sealing surface (32) of the gap seal is sealed to the component two mounting mating surface (91).

9. The overpressure-resistant sealing structure according to claim 7, characterized in that: The anti-overcompression sealing assembly is installed at the mating gap (C) formed by the mating of component one (8) and component two (9). Component one has a component one mounting mating surface (81), and component two has a component two mounting mating surface (91). A floating groove (10) is provided on the component two mounting mating surface (91), and several floating component limiting grooves (11) are provided at the bottom of the floating groove (10). The anti-overcompression sealing assembly is set in the floating groove (10), and the gap sealing surface (32) of the gap seal is sealed to the component one mounting mating surface (81).

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