High-temperature and high-pressure shell structure and gas turbine combustion chamber tester

Abstract

The invention provides a high-temperature and high-pressure shell structure and a gas turbine combustion chamber tester, the high-temperature and high-pressure shell structure comprises a heat bearing shell, a pressure bearing shell and an expansion joint, the heat bearing shell defines a channel for high-temperature and high-pressure airflow to flow, a cooling water cavity is formed between the heat bearing shell and the pressure bearing shell, and the expansion joint is arranged in the cooling water cavity. The wall thickness of the heat bearing shell is smaller than that of the pressure bearing shell. The expansion joint is arranged between the heat bearing shell and the pressure bearing shell, the two ends, in the deformation direction, of the expansion joint are connected with the pressure bearing shell and the heat bearing shell correspondingly, and the expansion joint is used for deforming under the condition that the heat bearing shell is heated to expand, so that an expansion space is provided for the heat bearing shell. According to the high-temperature and high-pressure shell structure provided by the invention, the thin-layer heat bearing shell and the thick-layer pressure bearing shell are arranged, and the expansion joint is formed between the thin-layer heat bearing shell and the thick-layer pressure bearing shell, so that the heat bearing shell can freely expand under the heating condition, the heat bearing thermal stress of the heat bearing shell is reduced, and the possibility of cracking of the heat bearing shell under high-temperature gas scouring is further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of aero-engine combustion chamber testing, and in particular to a high-temperature and high-pressure casing structure and a gas turbine combustion chamber testing device. Background Art

[0002] As an important performance indicator of the combustion chamber of an aircraft engine, the outlet temperature field has a significant impact on the engine efficiency, life and reliability of the first-stage guide vanes of the high-pressure turbine. With the development of high thrust-to-weight ratio engines, the outlet temperature of the combustion chamber continues to increase, the average outlet temperature can reach 2100K, the hot spot temperature can reach more than 2300K, and the outlet pressure can reach more than 3MPa. The measurement section and the transition stage shell after the combustion chamber will be eroded by high-temperature combustion gas.

[0003] At present, the high-temperature and high-pressure shell mainly adopts a water jacket structure and a double-layer shell. The shell is cooled by cooling water between the shells. The inner shell has a high shell temperature and large thermal stress due to the scouring of high-temperature gas, and is prone to cracking. Summary of the invention

[0004] The object of the present invention is to provide a high-temperature and high-pressure shell structure, which can improve the problem that the high-temperature and high-pressure shell is prone to cracking under the scouring of high-temperature combustion gas in the existing combustion chamber test.

[0005] Another object of the present invention is to provide a gas turbine combustion chamber tester, which can improve the problem of high-temperature and high-pressure casing being easily cracked under the scouring of high-temperature combustion gas in existing combustion chamber tests.

[0006] The embodiments of the present invention can be implemented in the following ways:

[0007] A high temperature and high pressure shell structure, comprising:

[0008] A heat-bearing shell, wherein the heat-bearing shell forms a channel for high-temperature and high-pressure airflow;

[0009] A pressure-bearing shell, the pressure-bearing shell is connected to the heat-bearing shell, and the pressure-bearing shell is sleeved outside the heat-bearing shell to form a cooling water cavity between the heat-bearing shell and the pressure-bearing shell; the wall thickness of the heat-bearing shell is smaller than the wall thickness of the pressure-bearing shell; and

[0010] An expansion joint, wherein the expansion joint is arranged between the heat-bearing shell and the pressure-bearing shell, and the two ends of the expansion joint in the deformation direction are respectively connected to the pressure-bearing shell and the heat-bearing shell, and the expansion joint is used to deform when the heat-bearing shell expands due to heat, so as to provide expansion space for the heat-bearing shell.

[0011] Optionally, the expansion joint comprises a radial expansion joint and an axial expansion joint, the radial expansion joint extends radially of the heat bearing shell; the axial expansion joint extends axially of the heat bearing shell and is arranged at the rear end of the heat bearing shell.

[0012] Optionally, a plurality of radial expansion joint groups are distributed along the axial direction of the heat-bearing shell; each of the radial expansion joint groups includes a plurality of radial expansion joints distributed along the circumferential direction of the heat-bearing shell.

[0013] Optionally, each of the radial expansion joint groups includes four radial expansion joints evenly distributed along the circumference of the heat bearing shell.

[0014] Optionally, the high-temperature and high-pressure shell structure further includes a connecting flange, the connecting flange includes a first connecting arm and a second connecting arm connected to each other, the first connecting arm extends along the axial direction of the heat-bearing shell, and the second connecting arm extends along the radial direction of the heat-bearing shell;

[0015] One axial end of the axial expansion joint is fixedly connected to the heat bearing shell, and the other axial end of the axial expansion joint is fixedly connected to the first connecting arm;

[0016] The second connecting arm is fixedly connected to the pressure-bearing shell.

[0017] Optionally, the first connecting arm is overlapped on the tail end of the heat-bearing shell, and the first connecting arm is located radially outside the heat-bearing shell; a protrusion is provided on the outer circumferential surface of the heat-bearing shell, and the protrusion is flush with the outer circumferential surface of the first connecting arm; one axial end of the axial expansion joint is fixedly connected to the protrusion, and the other end of the axial expansion joint is fixedly connected to the outer circumferential surface of the first connecting arm.

[0018] Optionally, the axial expansion joint includes a first connection part, a second connection part and a third connection part which are connected in sequence, the first connection part is fixedly connected to the heat-bearing shell, and the third connection part is fixedly connected to the first connection arm; the cross-section of the second connection part is U-shaped, and the two free ends of the second connection part are fixedly connected to the first connection part and the third connection part respectively.

[0019] Optionally, a mounting hole is provided on the pressure shell, and the mounting hole extends radially through the pressure shell; the high-temperature and high-pressure shell structure also includes a cover installed on the pressure shell, and the cover is used to close the mounting hole; the radial expansion joint is located in the mounting hole, and one end of the radial expansion joint is fixedly connected to the heat-bearing shell, and the other end of the radial expansion joint is fixedly connected to the cover.

[0020] Optionally, the front end of the heat-bearing shell is fixed to the pressure-bearing shell by welding.

[0021] Optionally, a front flange and a rear flange are respectively provided at two axial ends of the pressure-bearing shell, the rear flange is provided with a water inlet channel connected to the cooling water chamber, and the front flange is provided with a water return channel connected to the cooling water chamber.

[0022] Optionally, a plurality of the water inlet channels are distributed on the rear flange along the circumference of the pressure shell; and / or,

[0023] A plurality of the water return channels are distributed on the front flange along the circumference of the pressure-bearing shell.

[0024] Optionally, the wall thickness of the heat-bearing shell is d, 3mm≤d≤5mm.

[0025] A gas turbine combustion chamber tester comprises the high-temperature and high-pressure casing structure as described above.

[0026] The high temperature and high pressure casing structure and the gas turbine combustion chamber tester provided by the embodiments of the present invention have the following beneficial effects:

[0027] An embodiment of the present invention provides a high-temperature and high-pressure shell structure, which includes a heat-bearing shell, a pressure-bearing shell and an expansion joint. The heat-bearing shell encloses a channel for high-temperature and high-pressure airflow to flow. The pressure-bearing shell is connected to the heat-bearing shell, and the pressure-bearing shell is sleeved outside the heat-bearing shell. A cooling water chamber is formed between the heat-bearing shell and the pressure-bearing shell, and the wall thickness of the heat-bearing shell is less than the wall thickness of the pressure-bearing shell. The expansion joint is arranged between the heat-bearing shell and the pressure-bearing shell, and the two ends of the expansion joint in the deformation direction are respectively connected to the pressure-bearing shell and the heat-bearing shell. The expansion joint is used to deform when the heat-bearing shell expands due to heat, thereby providing expansion space for the heat-bearing shell. The high-temperature and high-pressure shell structure provided by the present invention is formed by adding a thin layer of heat-bearing shell to a thick layer of pressure-bearing shell, and an expansion joint is formed between the two, so that the heat-bearing shell can expand freely when heated, thereby reducing the thermal stress of the heat-bearing shell, and further reducing the possibility of cracking of the heat-bearing shell under the scouring of high-temperature gas.

[0028] An embodiment of the present invention also provides a gas turbine combustion chamber tester, which includes the above-mentioned high-temperature and high-pressure shell structure, and therefore also has the beneficial effect that the heat-bearing shell can expand freely when heated, thereby reducing the thermal stress of the heat-bearing shell, and further reducing the possibility of cracking of the heat-bearing shell under the scouring of high-temperature fuel gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above features and advantages of the present invention can be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily drawn to scale, and components with similar related properties or features may have the same or similar reference numerals.

[0030] Figure 1 A schematic cross-sectional structure diagram of a high-temperature and high-pressure shell structure provided according to one aspect of the present invention is shown;

[0031] Figure 2 It shows an enlarged schematic diagram of a local structure at a radial expansion joint in a high-temperature and high-pressure casing structure provided according to one aspect of the present invention;

[0032] Figure 3 A schematic diagram of an enlarged local structure of an axial expansion joint in a high-temperature and high-pressure shell structure provided according to one aspect of the present invention is shown.

[0033] Reference numerals:

[0034] 100-high temperature and high pressure shell structure; 110-heat bearing shell; 111-protrusion; 112-channel; 120-pressure bearing shell; 121-front flange; 122-return water channel; 123-rear flange; 124-water inlet channel; 125-mounting hole; 126-accommodating groove; 131-cooling water chamber; 132-cover; 133-connecting flange; 134-first connecting arm; 135-second connecting arm; 140-radial expansion joint; 141-radial expansion joint group; 150-axial expansion joint; 151-first connecting part; 152-second connecting part; 153-third connecting part. DETAILED DESCRIPTION

[0035] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0036] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", "vertical" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] At the same time, it should be noted that the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, an integral connection, or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or the internal communication of two components, etc. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Figure 1 This is a schematic cross-sectional view of the high temperature and high pressure shell structure 100 provided in this embodiment. Figure 1 This embodiment provides a high-temperature and high-pressure casing structure 100, and also provides a gas turbine combustion chamber tester (not shown).

[0040] The gas turbine combustion chamber tester includes a high-temperature and high-pressure casing structure 100. Generally, the gas turbine combustion chamber tester includes a front transition section, a front measuring section, a test section, a rear measuring section and a rear transition section connected in sequence, and the test section has components such as a fuel injector, so that high-temperature combustion gas is formed in the test section, and the high-temperature combustion gas continues to flow backward, passing through the rear measuring section and the rear transition section in sequence. Therefore, when the combustion chamber test is performed, the rear measuring section and the rear transition section need to withstand the scouring of the high-temperature combustion gas. In other words, the rear measuring section and the rear transition section of various sizes in the gas turbine combustion chamber tester can adopt the high-temperature and high-pressure casing structure 100 provided in this embodiment.

[0041] The high-temperature and high-pressure shell structure 100 includes a heat-bearing shell 110, a pressure-bearing shell 120 and an expansion joint. The heat-bearing shell 110 encloses a channel 112 for high-temperature and high-pressure airflow. The pressure-bearing shell 120 is connected to the heat-bearing shell 110, and the pressure-bearing shell 120 is sleeved outside the heat-bearing shell 110. A cooling water cavity 131 is formed between the heat-bearing shell 110 and the pressure-bearing shell 120. The wall thickness of the heat-bearing shell 110 is less than that of the pressure-bearing shell 120. The expansion joint is arranged between the heat-bearing shell 110 and the pressure-bearing shell 120, and the two ends of the expansion joint in the deformation direction are respectively connected to the pressure-bearing shell 120 and the heat-bearing shell 110. The expansion joint is used to deform when the heat-bearing shell 110 expands due to heat, thereby providing expansion space for the heat-bearing shell 110. The high-temperature and high-pressure shell structure 100 provided by the present invention is a thin-layer heat-bearing shell 110 and a thick-layer pressure-bearing shell 120, and an expansion joint is formed between the two, so that the heat-bearing shell 110 can expand freely when heated, thereby reducing the thermal stress of the heat-bearing shell 110, and further reducing the possibility of cracking of the heat-bearing shell 110 under the scouring of high-temperature combustion gas. Optionally, the wall thickness of the heat-bearing shell 110 is d, 3mm≤d≤5mm. Optionally, the wall thickness d of the heat-bearing shell 110 can be set to 3mm, 4mm or 5mm. It should be noted that the wall thickness of the pressure-bearing shell 120 is specifically set according to the pressure-bearing requirements of the high-temperature and high-pressure shell structure 100, and it is sufficient to ensure that the pressure-bearing shell 120 can meet the pressure-bearing requirements.

[0042] Specifically, the high temperature and high pressure shell structure 100 has a front end and a rear end opposite to each other. Figure 1 The arrow on the left side of the central axis L shows the flow direction of the high-temperature gas, the front end is the end where the high-temperature gas enters the high-temperature and high-pressure shell structure 100, and the rear end is the end where the high-temperature and high-pressure gas leaves the high-temperature and high-pressure shell. In other words, in this embodiment, the front end of the high-temperature and high-pressure shell structure 100 is the end close to the test section, and the rear end of the high-temperature and high-pressure shell structure 100 is the end away from the test section. Accordingly, the pressure shell 120 and the heat shell 110 have opposite front ends and rear ends, respectively.

[0043] Further, the pressure shell 120 is provided with a front flange 121 and a rear flange 123 at both ends (i.e., the front end and the rear end) of the axial direction, respectively. Specifically, the front flange 121 is located at the front end of the pressure shell 120, and the rear flange 123 is located at the rear end of the pressure shell 120. The rear flange 123 is provided with a water inlet channel 124 communicating with the cooling water chamber 131, and the front flange 121 is provided with a water return channel 122 communicating with the cooling water chamber 131. The cooling water enters the cooling water chamber 131 from the water inlet channel 124 on the rear flange 123, and then the cooling water exchanges heat with the heat bearing shell 110 in the cooling water chamber 131, and then leaves the cooling water chamber 131 from the water return channel 122 on the front flange 121, so that the flow direction of the cooling water in the cooling water chamber 131 is opposite to the flow direction of the high-temperature gas.

[0044] Specifically, the water inlet channel 124 and the water return channel 122 extend respectively along the radial direction of the pressure shell 120. It should be noted that in the description of this embodiment, the heat shell 110 and the pressure shell 120 are coaxially arranged, so the axis L of the high-temperature and high-pressure shell structure 100 is the axis of the pressure shell 120 and the heat shell 110, and accordingly, the radial directions of the high-temperature and high-pressure shell structure 100, the pressure shell 120 and the heat shell 110 are all perpendicular to the axis L.

[0045] Optionally, multiple water inlet channels 124 are distributed on the rear flange 123 along the circumference of the pressure shell 120, so that the cooling water flows evenly throughout the cooling water cavity 131 to improve heat exchange uniformity. Preferably, the number of the water inlet channels 124 is set to be greater than or equal to eight.

[0046] Optionally, along the circumference of the pressure shell 120, a plurality of return channels 122 are distributed on the front flange 121 to allow the cooling water to flow evenly throughout the cooling water chamber 131 to improve heat exchange uniformity. Preferably, the number of the return channels 122 is set to be greater than or equal to eight.

[0047] In this embodiment, the expansion joint includes a radial expansion joint 140 and an axial expansion joint 150. The radial expansion joint 140 extends along the radial direction of the heat bearing shell 110, and the axial expansion joint 150 extends along the axial direction of the heat bearing shell 110 and is arranged at the rear end of the heat bearing shell 110. The radial expansion joint 140 allows the heat bearing shell 110 to expand freely in the radial direction when heated; the axial expansion joint 150 allows the heat bearing shell 110 to expand freely in the axial direction when heated, thereby effectively reducing the thermal stress of the heat bearing shell 110.

[0048] Figure 2 The enlarged schematic diagram of the local structure of the radial expansion joint 140 in the high temperature and high pressure shell structure 100 provided in this embodiment is shown. Figure 1 and Figure 2 Optionally, a mounting hole 125 is provided on the pressure shell 120, and the mounting hole 125 extends radially through the pressure shell 120. The high-temperature and high-pressure shell structure 100 also includes a cover 132 mounted on the pressure shell 120, and the cover 132 is used to close the mounting hole 125, so that an installation space for installing the radial expansion joint 140 is formed between the cover 132 and the heat-bearing shell 110 through the mounting hole 125. One end of the radial expansion joint 140 is fixedly connected to the heat-bearing shell 110, and the other end of the radial expansion joint 140 is fixedly connected to the cover 132, so that the radial expansion joint 140 is connected to the pressure shell 120 through the cover 132.

[0049] By opening the mounting hole 125 on the pressure-bearing shell 120, the radial expansion joint 140 can be installed after the pressure-bearing shell 120 and the heat-bearing shell 110 are installed and fixed. It should be noted that the mounting structure of the radial expansion joint 140 is not limited here. It can be understood that in some other embodiments, for example, the radial expansion joint 140 can also be directly fixed on the pressure-bearing shell 120.

[0050] Optionally, the radial expansion joint 140 may be a structure that undergoes elastic deformation along the radial direction of the heat-bearing shell 110, and its length (i.e., the distance between one end of the radial expansion joint 140 fixed on the heat-bearing shell 110 and one end of the radial expansion joint 140 installed on the cover 132) changes with the expansion of the heat-bearing shell 110.

[0051] Further, in this embodiment, a plurality of radial expansion joint groups 141 are distributed along the axial direction of the heat bearing shell 110. Each radial expansion joint group 141 includes a plurality of radial expansion joints 140 distributed along the circumferential direction of the heat bearing shell 110. Specifically, Figure 1 As shown, in this embodiment, two radial expansion joint groups 141 are provided in the high temperature and high pressure shell structure 100, and the two radial expansion joint groups 141 are respectively arranged near the front flange 121 and near the rear flange 123, and the two radial expansion joint groups 141 better provide expansion space for the radial free expansion of the heat bearing shell 110. It can be understood that in some other embodiments, the number of radial expansion joint groups 141 can also be set according to needs.

[0052] Optionally, each radial expansion joint group 141 includes four radial expansion joints 140. In other words, eight radial expansion joints 140 are provided in the high-temperature and high-pressure shell structure 100 provided in this embodiment. Along the circumference of the heat-bearing shell 110, the four radial expansion joints 140 are evenly distributed, that is, in each radial expansion joint group 141, the two adjacent radial expansion joints 140 are distributed at 90°. It can be understood that in some other embodiments, the number of radial expansion joints 140 in the radial expansion joint group 141 can also be set according to demand.

[0053] Figure 3 The enlarged schematic diagram of the local structure of the axial expansion joint 150 in the high temperature and high pressure shell structure 100 provided in this embodiment is shown. Figure 1 and Figure 3 In this embodiment, the high temperature and high pressure shell structure 100 further includes a connecting flange 133, and the connecting flange 133 includes a first connecting arm 134 and a second connecting arm 135 connected to each other. The first connecting arm 134 extends along the axial direction of the heat bearing shell 110, and the second connecting arm 135 extends along the radial direction of the heat bearing shell 110. Figure 3As shown, the cross section of the connecting flange 133 is L-shaped. One axial end of the axial expansion joint 150 is fixedly connected to the heat-bearing shell 110, and the other axial end of the axial expansion joint 150 is fixedly connected to the first connecting arm 134. The second connecting arm 135 is fixedly connected to the pressure-bearing shell 120, so that the heat-bearing shell 110 can be axially expanded and connected to the pressure-bearing shell 120.

[0054] Specifically, an annular receiving groove 126 is provided on the inner circumference of the pressure-bearing shell 120, and the axial expansion joint 150 is located in the receiving groove 126 after installation. In this embodiment, the water inlet channel 124 is connected to the bottom of the receiving groove 126, that is, the cooling water entering from the water inlet channel 124 first enters the receiving groove 126 and then enters the cooling water chamber 131 from the receiving groove 126. The axial expansion joint 150 is an annular member.

[0055] Optionally, the first connecting arm 134 is fixed to the axial expansion joint 150 by welding, and the second connecting arm 135 is fixed to the pressure-bearing shell 120 by welding.

[0056] Furthermore, the first connecting arm 134 is overlapped at the rear end of the heat bearing shell 110, and the first connecting arm 134 is located radially outside the heat bearing shell 110, and the first connecting arm 134 and the heat bearing shell 110 are matched with each other in tolerance. A protrusion 111 is provided on the outer peripheral surface of the heat bearing shell 110, and the protrusion 111 is flush with the outer peripheral surface of the first connecting arm 134. One axial end of the axial expansion joint 150 is fixedly connected to the protrusion 111, and the other end of the axial expansion joint 150 is fixedly connected to the outer peripheral surface of the first connecting arm 134. Since the protrusion 111 is flush with the outer peripheral surface of the first connecting arm 134, the axial ends of the axial expansion joint 150 are at equal distances from the axis.

[0057] Furthermore, the axial expansion joint 150 includes a first connection portion 151, a second connection portion 152 and a third connection portion 153 connected in sequence, the first connection portion 151 is fixedly connected to the heat bearing shell 110, and the third connection portion 153 is fixedly connected to the first connection arm 134. The cross section of the second connection portion 152 is U-shaped (such as Figure 3 As shown in FIG. 1 , the two free ends of the U-shape are respectively fixedly connected to the first connection part 151 and the second connection part 152, so that when the heat-bearing shell 110 is heated and expanded, the free ends of the second connection part 152 are deformed, so that the distance between the two free ends changes, thereby providing space for the axial free expansion of the heat-bearing shell 110. Specifically, the first connection part 151 is connected to the raised part 111 of the heat-bearing shell 110.

[0058] Furthermore, the front end of the heat-bearing shell 110 is welded and fixed to the pressure-bearing shell 120 .

[0059] The high-temperature and high-pressure shell structure 100 and the gas turbine combustion chamber tester provided by the embodiment of the present invention adopt the arrangement of a thin-layer heat-bearing shell 110 and a thick-layer pressure-bearing shell 120, and an axial expansion joint 150 and a radial expansion joint 140 are arranged between the heat-bearing shell 110 and the pressure-bearing shell 120, so that the axial expansion joint 150 provides an axial expansion space for the heat-bearing shell 110 when the heat-bearing shell 110 is heated, so that the heat-bearing shell 110 can expand freely in the axial direction. Similarly, the radial expansion joint 140 can provide a radial expansion space for the heat-bearing shell 110 when the heat-bearing shell 110 is heated, so that the heat-bearing shell 110 can expand freely in the radial direction. Thereby, the thermal stress of the heat-bearing shell 110 is reduced, the problem of easy cracking of the shell is improved, and the test effect is prevented from being affected by shell cracking and damage, thereby ensuring the smooth implementation of the test.

[0060] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technology in the field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A high temperature and high pressure shell structure, characterized in that: The high temperature and high pressure shell structure comprises: A heat-bearing shell, wherein the heat-bearing shell forms a channel for high-temperature and high-pressure airflow; A pressure-bearing shell, the pressure-bearing shell is connected to the heat-bearing shell, and the pressure-bearing shell is sleeved outside the heat-bearing shell to form a cooling water cavity between the heat-bearing shell and the pressure-bearing shell; the wall thickness of the heat-bearing shell is smaller than the wall thickness of the pressure-bearing shell; and An expansion joint, wherein the expansion joint is arranged between the heat-bearing shell and the pressure-bearing shell, and the two ends of the expansion joint in the deformation direction are respectively connected to the pressure-bearing shell and the heat-bearing shell, and the expansion joint is used to deform when the heat-bearing shell expands due to heat, so as to provide expansion space for the heat-bearing shell.

2. The high temperature and high pressure shell structure according to claim 1, characterized in that: The expansion joint comprises a radial expansion joint and an axial expansion joint. The radial expansion joint extends in the radial direction of the heat bearing shell; the axial expansion joint extends in the axial direction of the heat bearing shell and is arranged at the rear end of the heat bearing shell.

3. The high temperature and high pressure shell structure according to claim 2, characterized in that: A plurality of radial expansion joint groups are distributed along the axial direction of the heat-bearing shell; each of the radial expansion joint groups includes a plurality of radial expansion joints distributed along the circumferential direction of the heat-bearing shell.

4. The high temperature and high pressure shell structure according to claim 3, characterized in that: Each of the radial expansion joint groups includes four radial expansion joints evenly distributed along the circumference of the heat-bearing shell.

5. The high temperature and high pressure shell structure according to claim 2, characterized in that: The high-temperature and high-pressure shell structure further includes a connecting flange, wherein the connecting flange includes a first connecting arm and a second connecting arm connected to each other, wherein the first connecting arm extends along the axial direction of the heat-bearing shell, and the second connecting arm extends along the radial direction of the heat-bearing shell; One axial end of the axial expansion joint is fixedly connected to the heat bearing shell, and the other axial end of the axial expansion joint is fixedly connected to the first connecting arm; The second connecting arm is fixedly connected to the pressure-bearing shell.

6. The high temperature and high pressure shell structure according to claim 5, characterized in that: The first connecting arm is overlapped on the tail end of the heat-bearing shell, and the first connecting arm is located on the radially outer side of the heat-bearing shell; a protrusion is arranged on the outer circumferential surface of the heat-bearing shell, and the protrusion is flush with the outer circumferential surface of the first connecting arm; one axial end of the axial expansion joint is fixedly connected to the protrusion, and the other end of the axial expansion joint is fixedly connected to the outer circumferential surface of the first connecting arm.

7. The high temperature and high pressure shell structure according to claim 5, characterized in that: The axial expansion joint includes a first connection part, a second connection part and a third connection part which are connected in sequence, the first connection part is fixedly connected to the heat-bearing shell, and the third connection part is fixedly connected to the first connection arm; the cross-section of the second connection part is U-shaped, and the two free ends of the second connection part are fixedly connected to the first connection part and the third connection part respectively.

8. The high temperature and high pressure shell structure according to claim 2, characterized in that: A mounting hole is provided on the pressure-bearing shell, and the mounting hole extends radially through the pressure-bearing shell; the high-temperature and high-pressure shell structure also includes a cover installed on the pressure-bearing shell, and the cover is used to close the mounting hole; the radial expansion joint is located in the mounting hole, and one end of the radial expansion joint is fixedly connected to the heat-bearing shell, and the other end of the radial expansion joint is fixedly connected to the cover.

9. The high temperature and high pressure shell structure according to claim 2, characterized in that: The front end of the heat-bearing shell is welded and fixed to the pressure-bearing shell.

10. The high temperature and high pressure shell structure according to claim 1, characterized in that: A front flange and a rear flange are respectively provided at two axial ends of the pressure-bearing shell, a water inlet channel communicating with the cooling water cavity is provided on the rear flange, and a water return channel communicating with the cooling water cavity is provided on the front flange.

11. The high temperature and high pressure shell structure according to claim 10, characterized in that: A plurality of water inlet channels are distributed on the rear flange along the circumference of the pressure-bearing shell; and / or, A plurality of the water return channels are distributed on the front flange along the circumference of the pressure-bearing shell.

12. The high temperature and high pressure shell structure according to claim 1, characterized in that: The wall thickness of the heat bearing shell is d, 3mm≤d≤5mm.

13. A gas turbine combustion chamber tester, characterized in that: The gas turbine combustion chamber tester comprises a high temperature and high pressure casing structure as described in any one of claims 1 to 12.

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