Multi-degree-of-freedom coordinated double-wall flame tube penetrating floating seat

Abstract

The invention provides a multi-degree-of-freedom coordinated double-wall flame tube penetrating floating seat and belongs to the field of gas turbines.The double-wall flame tube comprises a flame tube outer wall and a flame tube inner wall, a first through hole is formed in the flame tube outer wall, a second through hole is formed in the flame tube inner wall, and the floating seat comprises an outer wall base fixed to the flame tube outer wall; the outer wall pressing plate is fixed to the outer wall base, and a first annular containing cavity is formed by the outer wall pressing plate and the outer wall base; the inner wall pressing plate is fixed to the inner wall of the flame tube, and a second annular containing cavity is formed by the inner wall pressing plate and the inner wall of the flame tube; the supporting base and the floating ring are arranged in the first annular containing cavity, the inner wall floating ring is arranged in the second annular containing cavity, the floating ring penetrates through the supporting base, a first through hole in the outer wall of the flame tube and a second through hole in the inner wall of the flame tube to be matched with the inner wall floating ring, and the matching face of the floating ring and the supporting base and the matching face of the floating ring and the inner wall floating ring are spherical faces. According to the invention, multi-degree-of-freedom displacement compensation of translation and rotation can be realized.

Description

Technical Field

[0001] The present application belongs to the field of gas turbines, and in particular relates to a multi-degree-of-freedom coordinated double-wall flame tube penetrating a floating seat. Background Art

[0002] As gas turbine combustor emission requirements become increasingly stringent, combustor design becomes increasingly challenging. Double-walled liner technology plays a significant role in reducing combustor emissions, making it a leading option for low-emission combustor liner solutions. Components such as the nozzle must be installed on the liner, and these components must penetrate the liner. Floating seats are required at this point, and these seats must meet displacement compensation requirements for both sealing and thermal coordination.

[0003] The currently commonly used floating seat structure is to set a base, floating ring and pressure plate on the curved wall of the flame tube. The base provides a floating surface for the floating ring, and the pressure plate limits the floating range of the floating ring. Components that need to pass through the flame tube, such as the nozzle, are inserted into the flame tube through the opening on the floating ring. The air pressure difference achieves compression and sealing between the floating ring and the base, and the floating of the floating ring achieves thermally coordinated displacement compensation. This structure is usually used on single-walled flame tubes. It can only achieve displacement compensation in the translation direction and cannot meet the displacement compensation requirements of the floating ring with multiple degrees of freedom. In addition, the mating surface between the base and the floating ring of the floating seat in this solution is flat. When the nozzle and other components are inserted into the floating ring, one end of the floating ring and the base is lifted due to processing and assembly problems. A large gap appears between the sealing surfaces of the floating ring and the base, resulting in a poor seal. Summary of the Invention

[0004] The purpose of the present application is to provide a multi-degree-of-freedom coordinated double-walled flame tube penetrating a floating seat to solve or alleviate at least one problem in the background technology.

[0005] The technical solution of the present application is: a multi-degree-of-freedom coordinated double-walled flame tube penetrating a floating seat, the double-walled flame tube comprising an outer flame tube wall and an inner flame tube wall, the outer flame tube wall being provided with a first through hole, the inner flame tube wall being provided with a second through hole, the double-walled flame tube penetrating a floating seat comprising:

[0006] An outer wall base fixed on the outer wall of the flame tube;

[0007] An outer wall pressure plate fixed on the outer wall base, wherein the outer wall pressure plate and the outer wall base form a first annular cavity;

[0008] an inner wall pressure plate fixed on the inner wall of the flame tube, wherein the inner wall pressure plate and the inner wall of the flame tube form a second annular cavity; and

[0009] The support seat and floating ring are arranged in the first annular cavity and the inner wall floating ring is arranged in the second annular cavity. The floating ring passes through the support seat, the first through hole on the outer wall of the flame tube, and the second through hole on the inner wall of the flame tube to cooperate with the inner wall floating ring, wherein the matching surfaces of the floating ring, the support seat and the inner wall floating ring are all spherical.

[0010] In at least one embodiment of the present application, the first through hole and the second through hole are collinearly arranged, and the diameters of the first through hole and the second through hole are the same or similar.

[0011] In at least one embodiment of the present application, the outer wall base is an L-shaped structure, one side of the outer wall base is fixedly connected to the outer wall of the flame tube, and the other side of the outer wall base extends vertically.

[0012] In at least one embodiment of the present application, the edge of the outer wall base is flush with the first through hole of the outer wall of the flame tube.

[0013] In at least one embodiment of the present application, the inner diameter of the outer wall pressure plate is smaller than the outer diameter of the floating ring and / or the support seat.

[0014] In at least one embodiment of the present application, protrusions are provided on the outer wall surface of the inner wall of the flame tube, the protrusions are located on both sides of the second through hole, and the inner wall pressure plate is fixed on the protrusions.

[0015] In at least one embodiment of the present application, there is a gap between the floating ring and the first through hole and the second through hole, and the gap is the same or similar to the distance between the support seat and the outer wall base and the distance between the inner wall floating ring and the protrusion on the inner wall of the flame tube.

[0016] In at least one embodiment of the present application, the outer wall pressure plate and the outer wall base are fixed by welding; the inner wall pressure plate and the inner wall of the flame tube are fixed by welding.

[0017] In at least one embodiment of the present application, the inner diameter of the inner wall pressure plate is the same as or similar to the inner diameter of the second through hole.

[0018] The multi-degree-of-freedom coordinated double-walled flame tube provided by this application, which penetrates the floating seat, can achieve multi-degree-of-freedom displacement compensation in both translation and rotation. When used on a double-walled flame tube, this solves the thermal coordination issue of components such as nozzles penetrating the double-walled flame tube, compensating for both translational and rotational displacements, thereby improving the reliability of the floating seat. Furthermore, a spherical sealing structure is employed on the sealing surface to achieve a stable seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions provided by this application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application.

[0020] Figure 1 This is a schematic diagram of the multi-degree-of-freedom coordinated double-layer flame tube penetrating the floating seat structure of this application. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the drawings in the embodiments of this application.

[0022] In order to achieve not only displacement compensation in the translation direction but also displacement compensation in the rotation direction, and at the same time achieve sealing of the double-wall flame tube at their respective positions, the present application provides a multi-degree-of-freedom coordinated double-wall flame tube penetrating a floating seat structure.

[0023] like Figure 1 As shown, the multi-degree-of-freedom coordinated double-wall flame tube provided by the present application penetrates the floating seat 20 and includes: an outer wall base 21, an outer wall pressure plate 22, a floating ring 23, a support seat 24, an inner wall floating ring 25 and an inner wall pressure plate 26.

[0024] The double-walled flame tube 10 is primarily composed of an outer flame tube wall 11 and an inner flame tube wall 12. A first through-hole 13 is defined in the outer flame tube wall 11, and a second through-hole 14 is defined in the inner flame tube wall 12. The first through-hole 13 and the second through-hole 14 are collinearly arranged. Typically, the first through-hole 13 and the second through-hole 14 have the same diameter. However, it is understood that the floating seat structure 20 of the present application can also be applied even if the diameters of the first through-hole 13 and the second through-hole 14 are different.

[0025] The outer wall base 21 is L-shaped, with one side fixed to the outer wall 11 of the flame tube and its edge flush with the first through hole 13, and the other side extending vertically and located away from the first through hole 13. In some embodiments of the present application, the outer wall base 21 can be fixedly connected to the outer wall 11 of the flame tube by welding, or the outer wall base 21 can be fixedly connected to the outer wall 11 of the flame tube by riveting or bolting.

[0026] The outer wall pressure plate 22 is an annular structure, with one end fixed to the outer wall base 21 and the other end suspended. An annular cavity is formed between the outer wall pressure plate 22 and the outer wall base 21, limiting the axial movement of the floating ring 23 and the support seat 24. Preferably, the inner diameter of the outer wall base 22 is significantly smaller than the outer diameter of the floating ring 23 or the support seat 24, thereby easily limiting the position of the floating ring 23 and the support seat 24. Exemplarily, the outer wall pressure plate 22 is fixedly connected to the outer wall base 21 by welding, forming an integrated structure.

[0027] The inner wall pressure plate 26 is fixedly disposed on the inner wall 12 of the flame tube to form an annular cavity that limits the movement range of the inner wall floating ring 25. In the present application, the outer side surface of the inner wall 12 of the flame tube is provided with protrusions on both sides of the second through hole 14, and the inner wall pressure plate 26 is fixed on the protrusions. Exemplarily, the inner wall pressure plate 26 is fixedly connected to the inner wall 12 of the flame tube by welding. In some embodiments of the present application, the inner diameter of the inner wall pressure plate 26 is the same as or similar to the inner diameter of the second through hole 14. In the illustrated embodiment of the present application, the inner wall pressure plate 26 is slightly smaller than the inner diameter of the second through hole 14, thereby facilitating the installation of the inner wall floating ring 25.

[0028] The inner wall floating ring 25 is L-shaped, with one side mounted within the annular cavity between the duct inner wall 12 and the inner wall pressure plate 26, and the other side extending axially. The support base 24 is mounted within the annular cavity between the outer wall base 21 and the floating ring 23, with its support surface used to support the floating ring 23.

[0029] The floating ring 23 penetrates the support base 24, the outer wall base 21, the outer wall 11 of the flame tube, and the inner wall 12 of the flame tube, mating with the inner wall floating ring 25. The first mating surface 231 between the support base 24 and the floating ring 23 is a spherical inclined surface, and the second mating surface 232 between the floating ring 23 and the inner wall floating ring 25 is also a spherical surface. In the preferred embodiment of the present application, a gap exists between the floating ring 23 and the first through-hole 13 and the second through-hole 14. This gap is the same as or similar to the spacing between the support base 24 and the outer wall base 21, and the spacing between the inner wall floating ring 25 and the protrusion on the inner wall 12 of the flame tube.

[0030] In the present application, the first mating surface 231 between the floating ring 23 and the support seat 24, and the second mating surface 232 between the floating ring 23 and the inner wall floating ring 25, are both convex or concave spherical surfaces, while the corresponding mating surfaces between the support seat 24 and the inner wall floating ring 25 are both concave or convex spherical surfaces. Preferably, the mating surfaces between the floating ring 23, the support seat 24, and the inner wall floating ring 25 are convex spherical surfaces, while the corresponding mating surfaces between the support seat 24 and the inner wall floating ring 25 are both concave spherical surfaces, thereby improving the supportability of the structure.

[0031] In a preferred embodiment of the present application, the outer wall base 21, outer wall pressure plate 22, floating ring 23, support seat 24, inner wall floating ring 25, and inner wall pressure plate 26 of the floating seat can all be made of high-temperature resistant metal materials. For example, these components can be made of nickel-based alloy materials, or they can also be made of titanium alloy materials.

[0032] When the double-wall flame tube provided by the present application penetrates the floating seat 20 and is working, the floating seat structure realizes displacement compensation in the translation direction through the gap between the floating ring 23 and the first through hole 13, the second through hole 14, the distance between the support seat 24 and the outer wall base 21, and the distance between the inner wall floating ring 25 and the protrusion on the inner wall 12 of the flame tube. At the same time, the floating ring 23 can be rotated relative to the support seat 24 and the inner wall floating ring 25 to realize displacement compensation in the rotation direction. At the same time, the double-wall flame tube 10 is sealed at its respective corresponding positions through the spherical surface between the floating ring 23 and the support seat 24 and the inner wall floating ring 25 and the bottom surface of the support seat 24 and the inner wall floating ring 25, and the sealing structure is relatively stable.

[0033] The multi-degree-of-freedom coordinated double-walled flame tube provided by this application, which penetrates the floating seat, can achieve multi-degree-of-freedom displacement compensation in both translation and rotation. When used on a double-walled flame tube, this solves the thermal coordination issue of components such as nozzles penetrating the double-walled flame tube, compensating for both translational and rotational displacements, thereby improving the reliability of the floating seat. Furthermore, a spherical sealing structure is employed on the sealing surface to achieve a stable seal.

[0034] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A multi-degree-of-freedom coordinated double-wall flame tube penetrating a floating seat, wherein the double-wall flame tube (10) comprises a flame tube outer wall (11) and a flame tube inner wall (12), wherein the flame tube outer wall (11) is provided with a first through hole (13), and the flame tube inner wall (12) is provided with a second through hole (14), characterized in that: include: An outer wall base (21) fixed on the outer wall (11) of the flame tube; an outer wall pressure plate (22) fixed on the outer wall base (21), wherein the outer wall pressure plate (22) and the outer wall base (21) form a first annular cavity; An inner wall pressure plate (26) fixed on the inner wall (12) of the flame tube, wherein the inner wall pressure plate (26) and the inner wall (12) of the flame tube form a second annular cavity; and A support seat (24) and a floating ring (23) are arranged in the first annular cavity, and an inner wall floating ring (25) is arranged in the second annular cavity. The floating ring (23) passes through the support seat (24), a first through hole (13) on the outer wall of the flame tube (11), and a second through hole (14) on the inner wall of the flame tube (12) to cooperate with the inner wall floating ring (25), wherein the matching surfaces of the floating ring (23), the support seat (24) and the inner wall floating ring (25) are all spherical.

2. The multi-degree-of-freedom coordinated double-walled flame tube penetrating the floating seat according to claim 1 is characterized in that: The first through hole (13) and the second through hole (14) are arranged in a colinear manner, and the diameters of the first through hole (13) and the second through hole (14) are the same or similar.

3. The multi-degree-of-freedom coordinated double-walled flame tube penetrating the floating seat according to claim 2 is characterized in that: The outer wall base (21) is an L-shaped structure, one side of the outer wall base (21) is fixedly connected to the outer wall (11) of the flame tube, and the other side of the outer wall base (21) extends vertically.

4. The multi-degree-of-freedom coordinated double-walled flame tube penetrating the floating seat according to claim 3 is characterized in that: The edge of the outer wall base (21) is flush with the first through hole (13) of the flame tube outer wall (11).

5. The multi-degree-of-freedom coordinated double-walled flame tube penetrating the floating seat according to claim 4 is characterized in that: The inner diameter of the outer wall pressure plate (22) is smaller than the outer diameter of the floating ring (23) and / or the support seat (24).

6. The multi-degree-of-freedom coordinated double-walled flame tube penetrating the floating seat according to any one of claims 1 to 5, characterized in that: A protrusion is provided on the outer wall surface of the flame tube inner wall (12), the protrusion is located on both sides of the second through hole (14), and the inner wall pressure plate (26) is fixed on the protrusion.

7. The multi-degree-of-freedom coordinated double-walled flame tube penetrating the floating seat according to claim 6 is characterized in that: There is a gap between the floating ring (23) and the first through hole (13) and the second through hole (14), and the gap is the same as or similar to the distance between the support seat (24) and the outer wall base (21) and the distance between the inner wall floating ring (25) and the protrusion on the inner wall of the flame tube (12).

8. The multi-degree-of-freedom coordinated double-walled flame tube penetrating the floating seat according to claim 1 is characterized in that: The outer wall pressure plate (22) and the outer wall base (21) are fixed by welding; the inner wall pressure plate (26) and the inner wall (12) of the flame tube are fixed by welding.

9. The multi-degree-of-freedom coordinated double-walled flame tube penetrating the floating seat according to claim 1 is characterized in that: The inner diameter of the inner wall pressure plate (26) is the same as or similar to the inner diameter of the second through hole (14).

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