CN113565652A

CN113565652A - Multilayer fixed high-temperature fluid channel

Info

Publication number: CN113565652A
Application number: CN202110850558.9A
Authority: CN
Inventors: 邹建军; 吴继平; 肖礼; 张家奇; 徐万武; 陈健; 杨帆; 刘斌; 周奇遇
Original assignee: National University of Defense Technology
Current assignee: National University of Defense Technology
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2021-10-29
Anticipated expiration: 2041-07-27
Also published as: CN113565652B

Abstract

The invention discloses a multilayer fixed high-temperature fluid channel which comprises a first connecting seat, a second connecting seat and a channel wall of a cylindrical structure, wherein the channel wall comprises an inner wall and an outer wall, the inner wall comprises a plurality of inner wall surfaces, and the outer wall comprises a plurality of wall surfaces; support components are arranged between two adjacent inner wall surfaces and between two adjacent outer wall surfaces; one end of each outer wall surface is connected with the first connecting seat, and the other end of each outer wall surface is connected with the first connecting seat; one end of each inner wall surface is connected with the first connecting seat, and a deformation gap is formed between the other end of each inner wall surface and the second connecting seat; a limiting structure is arranged between the inner wall surface of the outermost layer and the outer wall surface of the innermost layer. The wall surfaces of a plurality of cylindrical structures are sleeved layer by layer to form channel walls of a plurality of layers of fixed high-temperature fluid channels, and an annular clearance cavity is formed between the adjacent wall surfaces, so that heat flow transmitted from the inner wall of the channel to the outer wall of the channel is greatly reduced, and the minimum consumption of working medium heat sink on the premise of ensuring safe work of the plurality of layers of fixed high-temperature fluid channels is realized.

Description

Multilayer fixed high-temperature fluid channel

Technical Field

The invention relates to the technical field of multilayer fixed high-temperature fluid channel structure design, in particular to a multilayer fixed high-temperature fluid channel.

Background

In the application process of the high-temperature fluid channel, the wall surface of the high-temperature gas channel generally has an upper working temperature limit in consideration of the high-temperature resistant strength of the channel wall material, and when the fluid temperature exceeds the upper usable material temperature limit, a proper heat dredging scheme is required to ensure that the temperature of the inner wall of the channel works below the usable limit temperature of the material.

The heat dredging scheme which can work for a long time is generally an active cooling scheme, and particularly adopts a flow channel which is reasonably arranged in a wall surface and through which a cooling working medium flows, so that heat which exceeds the safe working bearing range of the inner wall of a gas channel is taken away in time, the temperature of the inner wall of the channel is kept to be lower than the limit working temperature, and the temperature of the cooling working medium is increased in the process. In practical applications, however, it is often desirable to operate the inner wall of the gas channel as uniformly as possible and slightly below its ultimate operating temperature. In this case, when the cooling flow, the allowable temperature rise, the area, and the like are insufficient, and the cooling capacity of the coolant is insufficient, the inner wall of the gas passage is overheated, and the cooling fails. However, if the mass of the cooling working medium, the allowable temperature rise, the cooling area and the like are increased too much, the conducted heat flow is too much, too much working medium heat sink is consumed, and energy waste is caused. It can be seen that under such a background condition, the active cooling scheme of the high-temperature fluid channel needs to be optimally designed, and the high-temperature fluid channel is used to ensure the reliable operation under the condition that the consumption of the coolant heat sink is as low as possible.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the multilayer fixed high-temperature fluid channel, which realizes that the working medium heat sink consumption of the multilayer fixed high-temperature fluid channel is minimum on the premise of ensuring the safe work.

In order to achieve the above object, the present invention provides a multilayer fixed high-temperature fluid channel, which includes a first connecting seat, a second connecting seat, and a channel wall with a cylindrical structure, wherein the channel wall includes an inner wall and an outer wall sleeved on the inner wall;

the inner wall comprises a plurality of inner wall surfaces sleeved layer by layer, the outer wall comprises a plurality of outer wall surfaces sleeved layer by layer, and the inner wall surface and the outer wall surfaces are both of a cylindrical structure;

an annular clearance cavity of a cylindrical structure is enclosed between every two adjacent inner wall surfaces and between every two adjacent outer wall surfaces, and a support assembly is arranged in the annular clearance cavity to connect and support the two adjacent inner wall surfaces or the two adjacent outer wall surfaces;

one end of each outer wall surface is connected with the first connecting seat, and the other end of each outer wall surface is connected with the first connecting seat;

one end of each inner wall surface is connected with the first connecting seat, and a deformation gap is arranged between the other end of each inner wall surface and the second connecting seat so as to provide an accommodating space for the inner wall surfaces when the inner wall surfaces are deformed and extended by thermal stress;

a limiting structure is arranged between the inner wall surface of the outermost layer and the outer wall surface of the innermost layer, so that the inner wall surface is biased to axially extend when deformed by thermal stress.

In one embodiment, the limiting structure comprises at least one group of limiting components, the limiting components comprise limiting strips and limiting grooves of a strip-shaped structure, and the limiting strips and the limiting grooves are in concave-convex clearance fit;

the limiting strip is arranged on one of the inner wall surface of the outermost layer and the outer wall surface of the innermost layer along the axial direction, and the limiting groove is arranged on the other one of the inner wall surface of the outermost layer and the outer wall surface of the innermost layer along the axial direction.

In one embodiment, a first buffer structure capable of buffering thermal stress deformation is arranged on the support assembly.

In one embodiment, the support assembly includes a plurality of support ribs disposed in the corresponding annular gap cavities, two sides of each support rib are respectively connected to two corresponding inner wall surfaces or two corresponding outer wall surfaces, and the first buffer structure is a first hollow cavity disposed in the support rib.

In one embodiment, the support ribs are strip-shaped structures, and in the same support assembly, the support ribs are distributed in the annular clearance cavity along the circumferential direction of the annular clearance cavity; or

The supporting ribs are of annular structures, and in the same supporting assembly, the supporting ribs are distributed in the annular clearance cavity along the axial direction of the annular clearance cavity.

In one embodiment, the support ribs in two adjacent annular clearance cavities are offset from each other.

In one embodiment, the support ribs in a part of the support assemblies are in a strip-shaped structure, and the support ribs in the part of the support assemblies are distributed in the annular clearance cavity along the circumferential direction of the corresponding annular clearance cavity;

the support ribs in the other part of the support assembly are of annular structures, and the support ribs in the part of the support assembly are distributed in the annular clearance cavity along the axial direction of the corresponding annular clearance cavity.

In one embodiment, the cooling device further comprises a plurality of cooling channels, and each cooling channel is uniformly distributed on the outer wall of the outer wall surface of the outermost layer or is uniformly distributed in the annular gap cavity of the outermost layer.

In one embodiment, the outer wall surface and the inner wall surface are provided with second buffer structures, and the second buffer structures comprise a plurality of arc-shaped grooves protruding outwards;

the arc-shaped grooves are of strip-shaped structures, and the arc-shaped grooves are distributed on the corresponding outer wall surface or inner wall surface at intervals along the circumferential direction of the wall surface; or

The arc-shaped grooves are of annular structures, and the arc-shaped grooves are distributed on the corresponding outer wall surface or inner wall surface at intervals along the axial direction of the wall surface.

In one embodiment, the connecting seat, the outer wall surface, the inner wall surface, the supporting component, the cooling channel and the arc-shaped groove are integrally formed.

The invention provides a multilayer fixed high-temperature fluid channel, which is characterized in that wall surfaces of a plurality of cylindrical structures are sleeved layer by layer to form channel walls of the multilayer fixed high-temperature fluid channel, and an annular clearance cavity is formed between adjacent inner wall surfaces and adjacent outer wall surfaces, so that heat flow transmitted from the inner wall of the channel to the outer wall of the channel is greatly reduced, and the minimum consumption of working medium heat sink of the multilayer fixed high-temperature fluid channel is realized on the premise of ensuring safe work.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is an isometric view of a multilayer fixed high temperature fluid channel in an embodiment of the invention;

FIG. 2 is an enlarged view of a portion of the label A of FIG. 1;

FIG. 3 is a circumferential cross-sectional view of a multilayer fixed high temperature fluid channel in an embodiment of the invention;

FIG. 4 is an enlarged view of a portion of the label B of FIG. 1;

FIG. 5 is an enlarged view of a portion of the multilayer fixed high temperature fluid passage of FIG. 1, identified as portion A, with a second hollow cavity;

FIG. 6 is an enlarged view of a portion of the multilayer fixed high temperature fluid passage of FIG. 3, indicated at B, with a second hollow cavity;

FIG. 7 is a circumferential cross-sectional view of a multilayer fixed high temperature fluid channel in an embodiment of the invention;

FIG. 8 is an enlarged view of a portion of the structure of reference part C of FIG. 7;

FIG. 9 is an enlarged view of a portion of the multilayer fixed high temperature fluid passage of FIG. 3, indicated at B, with a first hollow cavity;

FIG. 10 is an enlarged view of a portion of the multilayer fixed high temperature fluid passage of FIG. 7, shown with reference to section C, with a first hollow cavity;

FIG. 11 is a schematic structural diagram of a first hollow cavity in an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a first hollow cavity at an end of a support rib, the first hollow cavity being a square cavity according to an embodiment of the present invention;

FIG. 13 is a schematic structural diagram of a first hollow cavity in the middle of a support rib, the first hollow cavity being a square cavity in the embodiment of the present invention;

FIG. 14 is a schematic structural diagram of a first hollow cavity being a circular cavity and located at an end of a support rib according to an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of a first hollow cavity being a circular cavity and located in the middle of a support rib according to an embodiment of the present invention;

FIG. 16 is a schematic view of the structure of the support ribs in two adjacent annular clearance cavities being staggered with respect to each other in the embodiment of the present invention;

FIG. 17 is a schematic view of a spacing arrangement of support ribs according to an embodiment of the present invention;

FIG. 18 is a schematic structural view of the support ribs arranged adjacent to each other in the embodiment of the present invention;

FIG. 19 is a circumferential cross-sectional view of a second embodiment of a cooling gallery with multiple layers of fixed high temperature fluid passages in an example embodiment of the invention;

FIG. 20 is an enlarged view of a portion of portion D of FIG. 19;

fig. 21 is a schematic structural view of an arc-shaped slot in an embodiment of the invention.

Reference numerals: the first connecting seat 10, the second connecting seat 20, the inner wall surface 30, the outer wall surface 40, the annular clearance cavity 50, the limiting strip 601, the second hollow cavity 6011, the limiting groove 602, the supporting rib 70, the first hollow cavity 701, the cooling channel 80, the liquid inlet 801, the liquid outlet 802, and the arc-shaped groove 90.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; the connection can be mechanical connection, electrical connection, physical connection or wireless communication connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

As shown in fig. 1, the present embodiment discloses a multilayer fixed high-temperature fluid channel, which includes a first connecting seat 10, a second connecting seat 20, and a channel wall of a cylindrical structure, where the channel wall includes an inner wall and an outer wall sleeved on the inner wall, specifically, the inner wall includes a plurality of inner wall surfaces 30 sleeved layer by layer, the outer wall includes a plurality of outer wall surfaces 40 sleeved layer by layer, and both the inner wall surfaces 30 and the outer wall surfaces 40 are of cylindrical structures. And a cylindrical annular clearance cavity 50 is enclosed between every two adjacent inner wall surfaces 30 and between every two adjacent outer wall surfaces 40, and a support component is arranged in the annular clearance cavity 50 to connect and support the two adjacent inner wall surfaces 30 or the two adjacent outer wall surfaces 40. One end of each outer wall surface 40 is connected with the first connecting seat 10, and the other end of each outer wall surface 40 is connected with the first connecting seat 10; one end of each inner wall surface 30 is connected with the first connecting seat 10, and a deformation gap shown in fig. 2 is arranged between the other end of each inner wall surface 30 and the second connecting seat 20 so as to provide a containing space for the inner wall surfaces 30 when the inner wall surfaces 30 are deformed and extended by thermal stress; in addition, a limiting structure is provided between the outermost inner wall surface 30 and the innermost outer wall surface 40 so that the inner wall surface 30 is biased to expand in the axial direction when deformed by thermal stress. The structural design not only greatly reduces the heat flow transmitted from the inner wall of the channel wall to the outer wall of the channel wall, but also realizes that the working medium heat sink consumption of the multilayer fixed high-temperature fluid channel is minimum on the premise of ensuring safe work.

Further specifically, the limiting structure comprises at least one group of limiting components, each limiting component comprises a limiting strip 601 and a limiting groove 602, and the limiting strip 601 and the limiting groove 602 are in a strip-shaped structure and are in concave-convex clearance fit; the restricting strip 601 is provided on one of the innermost inner wall surface 30 and the innermost outer wall surface 40 in the axial direction, and the restricting groove 602 is provided on the other of the innermost inner wall surface 30 and the innermost outer wall surface 40 in the axial direction. Referring to fig. 2 to 4, the number of the limiting components in the present embodiment is multiple, and the limiting components are distributed at intervals in the circumferential direction between the outermost inner wall surface 30 and the innermost outer wall surface 40, wherein the limiting strips 601 are located on the outer wall of the outermost inner wall surface 30, and the limiting grooves 602 are located on the inner wall of the innermost outer wall surface 40, so that when the inner wall surface 30 is deformed by thermal stress, under the limiting action of the limiting strips 601 and the limiting grooves 602, the inner wall surface 30 is more biased to extend in the circumferential direction, and further cooperates with the above deformation clearance, so as to improve the thermal stress deformation resistance of the high-temperature fluid channel.

In this embodiment, the limiting strip 601 includes a connecting portion and an embedded portion, wherein one side of the connecting portion is connected to the inner wall surface 30 of the outermost layer, the other side of the connecting portion is connected to the other side of the embedded portion, and the embedded portion is embedded in the limiting groove, and preferably, a third buffer structure is provided on the limiting strip 601, and the third buffer structure is a second hollow cavity 6011 provided inside the embedded portion, so that the limiting structure has a certain elastic deformation capability, and further, thermal stress deformation at high temperature can be relieved, as shown in fig. 5-6. It should be noted that, although the second hollow cavity 6011 shown in fig. 5-6 has a circular cross section, in a specific implementation, the cross section may also be configured as a square or other profile structure.

Referring to fig. 4, 6, and 7-8, a first embodiment of the support assembly includes a plurality of support ribs 70, and both sides of the support ribs 70 are respectively connected to the two inner wall surfaces 30 or the two outer wall surfaces 40. The support rib 70 of this embodiment has three specific embodiments:

the first implementation structure is as follows: the support ribs 70 are strip-like structures, and each support rib 70 is distributed in the annular clearance cavity 50 along the circumferential direction of the annular clearance cavity 50, wherein the length direction of the support rib 70 is preferably kept parallel to the length direction of the channel wall, as shown in fig. 4 and 6. Of course, the length direction of the support rib 70 under this embodiment structure is not necessarily parallel to the length direction of the channel wall, and there may be some deflection angles, and the deflection angles may be adjusted adaptively according to the actual situation, and will not be described in detail in this embodiment.

The second implementation structure is as follows: the support ribs 70 are ring-shaped structures, and each support rib 70 is distributed in the annular clearance cavity 50 along the axial direction of the annular clearance cavity 50, wherein, preferably, the support ribs 70 are ring-shaped structures, and the circumferential direction of the support ribs is the same as the circumferential direction of the annular clearance cavity 50, namely, as shown in fig. 7-8. Of course, the support rib 70 under the implementation structure may also be an elliptical ring structure, that is, a certain included angle is formed between the circumferential direction of the support rib 70 and the circumferential direction of the annular clearance cavity 50, and as for the included angle, adaptive adjustment may be performed according to the actual situation, which is not described in detail in this embodiment.

The third implementation structure is as follows: the support ribs 70 have a spiral structure, thereby achieving a more uniform connection support effect.

Preferably, referring to fig. 9 to 10, on the basis of the first embodiment, the present embodiment further discloses a second embodiment of the supporting assembly, in which a first buffer structure is disposed on the supporting assembly, so that the supporting assembly has a certain elastic deformation capability, and further can alleviate thermal stress deformation at high temperature. The support rib 70 of this embodiment also has three specific embodiments:

the first implementation structure is as follows: the support ribs 70 are strip-shaped structures, the first buffer structure is a first hollow cavity 701 arranged inside the support ribs 70, and each support rib 70 is distributed in the annular clearance cavity 50 along the circumferential direction of the annular clearance cavity 50, wherein, preferably, the length direction of the support rib 70 is kept parallel to the length direction of the channel wall, namely, as shown in fig. 9, so that the support assembly has stronger thermal stress deformation resistance in the axial direction of the channel wall. Of course, the length direction of the support rib 70 under this embodiment structure is not necessarily parallel to the length direction of the channel wall, and there may be some deflection angles, and the deflection angles may be adjusted adaptively according to the actual situation, and will not be described in detail in this embodiment.

The second implementation structure is as follows: the support ribs 70 are ring-shaped structures, the first buffer structure is a first hollow cavity 701 arranged inside the support ribs 70, and each support rib 70 is distributed in the annular clearance cavity 50 along the axial direction of the annular clearance cavity 50, wherein, preferably, the support ribs 70 are ring-shaped structures, the circumferential direction of which is the same as the circumferential direction of the annular clearance cavity 50, namely, as shown in fig. 10, so that the support assembly has stronger thermal stress deformation resistance in the circumferential direction of the channel wall. Of course, the support rib 70 under the implementation structure may also be an elliptical ring structure, that is, a certain included angle is formed between the circumferential direction of the support rib 70 and the circumferential direction of the annular clearance cavity 50, and as for the included angle, adaptive adjustment may be performed according to the actual situation, which is not described in detail in this embodiment.

The third implementation structure is as follows: the supporting rib 70 is a spiral structure, and the first buffer structure is a first hollow cavity 701 arranged inside the supporting rib 70, so that a more uniform connecting and supporting effect is realized, and meanwhile, the supporting component has stronger thermal stress deformation resistance in the axial direction and the circumferential direction of the channel wall.

It should be noted that fig. 9-10 illustrate only one embodiment of the first hollow cavity 701 on the support rib 70, and the embodiment is directed such that the lower first hollow cavity 701 is a circular cavity. Referring to fig. 11, in an actual application process, the first hollow cavity 701 may also be set to be a square cavity, and an effect of relieving thermal stress deformation at a high temperature can also be achieved.

Further, the support rib 70 shown in fig. 9-10 is substantially a circular tube or a square tube, or may be a circular or square first hollow cavity 701 at the middle position or the end position of the support rib 70, that is, as shown in fig. 12-15, so that the support assembly can achieve the effect of relieving thermal stress deformation at high temperature, and can also effectively reduce the contact area between the support rib 70 and the inner wall surface and the outer wall surface, thereby reducing the heat sink consumption of the working medium in the channel.

Preferably, in the first and second embodiments of the support assembly, the support ribs 70 in two adjacent annular clearance cavities 50 are offset from each other, as shown in fig. 16, so that all the support ribs 70 in the channel walls are distributed more uniformly, i.e., the resistance to thermal stress deformation at various locations on the channel walls is more uniform.

Preferably, on the basis of the second embodiment, the present embodiment further discloses a third embodiment, not shown, of the support assembly, and the third embodiment is as follows: the support ribs 70 in a part of the support assembly are in a strip-shaped structure, and the support ribs 70 in the part of the support assembly are distributed in the annular clearance cavity 50 along the circumferential direction of the corresponding annular clearance cavity 50; the support ribs 70 of the other part of the support assembly are annular structures, and the support ribs 70 of the part of the support assembly are distributed in the annular clearance cavity 50 along the axial direction of the corresponding annular clearance cavity 50. That is, the first embodiment and the second embodiment of the present invention are provided at the same time, so that the support member has a strong thermal stress deformation resistance in both the axial direction and the circumferential direction of the channel wall.

Preferably, in the third embodiment of the supporting component, the supporting ribs 70 with the strip-shaped structure and the supporting ribs 70 with the ring-shaped structure are alternately distributed on the level of the annular clearance cavity 50, so that the thermal stress deformation resistance of the supporting component in the axial direction and the circumferential direction of the channel wall can be more uniform.

It should be noted that, when the layout has hollow support ribs 70 in the present embodiment, the support ribs 70 in the same assembly may be distributed at intervals or arranged close to each other, as shown in fig. 17-18.

The multilayer fixed high-temperature fluid channel in this embodiment further includes a plurality of cooling channels 80, and in this embodiment, the layout of the cooling channels 80 has two implementation structures: the first is that the cooling passages 80 are uniformly distributed on the outer wall of the outermost outer wall surface 40, as shown in fig. 3-4; second, the cooling passages 80 are uniformly distributed within the outermost annular clearance cavity 50, as shown in FIGS. 19-20. And the multilayer fixed high-temperature fluid channel is provided with a liquid inlet 801 and a liquid outlet 802 which are communicated with the cooling channel 80, so that cooling oil is circulated in the cooling channel 80. The cross section of the cooling channel 80 may be a circular structure or a square structure.

As a preferred embodiment, the outer wall surface 40 and the inner wall surface 30 are further provided with a second buffer structure, the second buffer structure includes a plurality of arc-shaped grooves 90 protruding outward, and specifically, the layout of the arc-shaped grooves 90 also has two implementation structures: the first is that the arc-shaped grooves 90 are in a strip-shaped structure, and each arc-shaped groove 90 is distributed on the corresponding outer wall surface 40 or inner wall surface 30 at intervals along the circumferential direction of the outer wall surface 40 or inner wall surface 30, that is, as shown in fig. 21; the second is that the arc-shaped grooves 90 are annular structures, and each arc-shaped groove 90 is distributed on the corresponding outer wall surface 40 or inner wall surface 30 at intervals along the axial direction of the outer wall surface 40 or inner wall surface 30. By providing the arc-shaped groove 90, the outer wall surface 40 or the inner wall surface 30 also has a strong thermal stress deformation resistance.

It should be noted that, based on the above structural design of the multilayer fixed high-temperature fluid channel, the connecting seat, the outer wall surface 40, the inner wall surface 30, the supporting component, the cooling channel 80, and the arc-shaped groove 90 in this embodiment can be integrally formed by an additive manufacturing technology, so that the working medium heat sink consumed by the multilayer fixed high-temperature fluid channel is minimum on the premise of ensuring safe working, and the overall performance of the multilayer fixed high-temperature fluid channel can be effectively improved.

It should be noted that, although the cross section of the high-temperature fluid channel in this embodiment is a circular structure, the cross section of the high-temperature fluid channel may be designed to be a rectangle or other anisotropic structure during the implementation.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The multilayer fixed high-temperature fluid channel is characterized by comprising a first connecting seat, a second connecting seat and a channel wall of a cylindrical structure, wherein the channel wall comprises an inner wall and an outer wall sleeved on the inner wall;

2. The multilayer fixed high-temperature fluid channel as claimed in claim 1, wherein the limiting structure comprises at least one group of limiting components, the limiting components comprise limiting strips and limiting grooves of a strip-shaped structure, and concave-convex clearance fit is formed between the limiting strips and the limiting grooves;

3. The multilayer fixed high temperature fluid channel of claim 1, wherein said support assembly is provided with a first buffer structure capable of mitigating thermal stress deformation.

4. The multilayer fixed high-temperature fluid channel according to claim 3, wherein the supporting member comprises a plurality of supporting ribs disposed in the corresponding annular gap cavities, two sides of the supporting ribs are respectively connected to the two corresponding inner wall surfaces or the two corresponding outer wall surfaces, and the first buffer structure is a first hollow cavity disposed inside the supporting ribs.

5. The multilayer fixed high temperature fluid channel of claim 4, wherein the support ribs are strip-shaped structures, and in the same support assembly, each support rib is distributed in the annular clearance cavity along the circumferential direction of the annular clearance cavity; or

6. The multilayer fixed high temperature fluid channel of claim 5, wherein the support ribs in adjacent two annular clearance cavities are offset from each other.

7. The multilayer fixed high temperature fluid channel of claim 4, wherein the support ribs of a portion of the support members are strip-shaped structures, and the support ribs of the portion of the support members are distributed in the annular clearance cavity along the circumferential direction of the corresponding annular clearance cavity;

8. The multilayer fixed high temperature fluid channel according to any one of claims 1 to 7, further comprising a plurality of cooling channels, each of the cooling channels being uniformly distributed on the outer wall of the outermost outer wall surface or each of the cooling channels being uniformly distributed in the outermost annular gap cavity.

9. The multilayer fixed high-temperature fluid channel as claimed in claim 8, wherein the outer wall surface and the inner wall surface are provided with second buffer structures, and the second buffer structures comprise a plurality of arc-shaped grooves protruding outwards;

10. The multi-layer secured high temperature fluid passageway of claim 9, wherein said connecting base, outer wall surface, inner wall surface, support assembly, cooling passageway, arcuate slot are formed integrally.