Main body structure layout of high-temperature turbine tester

Abstract

The invention provides a high-temperature turbine tester main body structure layout, which comprises a turbine tester and a supporting device, and is characterized in that the turbine tester comprises a heating device, a rectifying chamber, a turbine test piece, an exhaust volute, a gear box and a dynamometer which are sequentially connected along the axial direction; the heating device is used for heating the passing airflow; the rectifying chamber is used for homogenizing the non-uniform temperature field and pressure field; the exhaust volute is used for exhausting the airflow from the axial direction to the radial direction; the turbine test piece is connected with the dynamometer through the gear box; the dynamometer is used for controlling the rotating speed of the turbine test piece and absorbing power generated by the turbine test piece; and the supporting device is arranged at the lower part of the turbine tester and is used for fixedly supporting the turbine tester. The length of the pipeline is shortened, the uniform flow field condition of an inlet of a turbine test piece is met, and the material cost and the machining difficulty of the pipeline and the volute are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of aero-engine turbine testing, and in particular to a main structural layout of a high-temperature turbine tester. Background Art

[0002] At present, the main structure layout of the conventional turbine tester includes a combustion heater 112, an intake volute 320, a turbine test piece 130, a gear box 150, and a hydraulic dynamometer as a dynamometer 160. An exhaust pipe 330 is also arranged behind the turbine test piece 130. The combustion heater 112 heats the incoming gas and changes the direction of the gas flow from radial to axial through the intake volute 320. Since the temperature field generated by the combustion heater 112 is uneven, it is necessary to form a relatively uniform temperature field through a longer pipeline (more than 10 meters) and a volute, and finally enter the turbine test piece 130 for expansion and work. The power of the turbine test piece 130 is absorbed by the dynamometer 160, and the speed is reduced through the gear box 150.

[0003] like Figure 1 As shown, the temperature of the air flow after the combustion heater 112 is relatively high. Due to the existence of the long pipe 310, the temperature loss of the air flow in the pipe is also relatively large. The temperature at the inlet of the turbine test piece 130 is reduced to varying degrees, which will cause energy waste. At the same time, the combustion heater 112 needs to be equipped with a complex fuel system.

[0004] The airflow enters the turbine test piece 130 through the intake volute 320, and forms a swirl in the volute, which will increase the total pressure unevenness and turbulence at the inlet of the turbine test piece 130, affecting the measurement of the total pressure at the inlet of the turbine test piece 130 and the evaluation of the test results.

[0005] If the required inlet temperature of the turbine test piece 130 is further increased, for example, the inlet temperature of the turbine test piece 130 is required to be increased to about 1000K, the material required for the long pipe 310 and the volute needs to be replaced by a high-temperature alloy from stainless steel, the material cost increases exponentially, and the processing and manufacturing of the volute will also be very difficult.

[0006] In view of this, the inventor of the present application designed a main structure layout of a high-temperature turbine tester in order to overcome the above-mentioned technical problems. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome the defects of the main structure layout of the turbine tester in the prior art, such as the pipeline length is too long, the flow field at the inlet of the test piece is uneven, the material cost of the pipeline and the volute is high, and the processing difficulty is great, and provide a main structure layout of a high-temperature turbine tester.

[0008] The present invention solves the above technical problems through the following technical solutions:

[0009] The present invention provides a main structural layout of a high-temperature turbine tester, which is characterized in that the structural layout includes a turbine tester and a supporting device, the turbine tester includes a heating device, a rectifying chamber, a turbine test piece, an exhaust volute, a gear box and a dynamometer connected in sequence along the axial direction; the heating device heats the passing airflow; the rectifying chamber performs uniform treatment on the uneven temperature field and pressure field; the exhaust volute changes the direction of the airflow from axial to radial for discharge; the gear box, the turbine test piece is connected to the dynamometer through the gear box; the dynamometer controls the rotation speed of the turbine test piece and absorbs the power generated by the turbine test piece; the supporting device is arranged at the lower part of the turbine tester, and is used to fix and support the turbine tester.

[0010] According to one embodiment of the present invention, the supporting device includes a heating device supporting structure, which is arranged at the lower part of the heating device, and is used to fix and support the heating device and absorb the thermal expansion of the heating device; an exhaust volute supporting structure, which is arranged at the lower part of the exhaust volute, and is used to fix and support the exhaust volute and absorb the thermal expansion of the exhaust volute.

[0011] According to one embodiment of the present invention, the heating device is an electric heater, and the electric heater is arranged horizontally.

[0012] According to one embodiment of the present invention, the heating device support structure includes a heating device bracket and a sliding track. The heating device bracket is installed at the lower part of the heating device and supports the electric heater at two locations in the front and rear in the axial direction; the sliding track is arranged at the lower part of the heating device bracket so that the heating device bracket can slide in the axial direction.

[0013] According to one embodiment of the present invention, the heating device support structure further comprises a motor, the motor is disposed on the sliding track, the motor is connected to the heating device bracket, and the motor is used to drag the heating device bracket to slide axially on the sliding track.

[0014] According to one embodiment of the present invention, the heating device bracket is supported at a horizontal position of the axis of the shell of the electric heater, so that the shell of the electric heater can expand freely in all directions without changing its central position when it expands due to heat.

[0015] According to one embodiment of the present invention, the exhaust volute support structure includes a side bracket and a lower bracket, the side bracket is fixedly connected to the shell on both sides of the exhaust volute in the radial horizontal direction; the lower bracket is fixedly connected to the bottom of the exhaust volute.

[0016] According to one embodiment of the present invention, the side bracket includes a first side bracket and a second side bracket, the first side bracket is fixedly connected to the shell on the opposite side of the gas outlet side of the exhaust volute in the radial horizontal direction; the second side bracket is fixedly connected to the shell on the gas outlet side of the exhaust volute.

[0017] According to an embodiment of the present invention, the exhaust volute support structure adopts a three-point unidirectional sliding support fixing method to fix and support the exhaust volute.

[0018] According to one embodiment of the present invention, the exhaust volute can move in a radial horizontal direction along the first side bracket and the second side bracket, and the freedom in other directions is restricted; the exhaust volute can move in a radial vertical direction along the lower bracket, and the freedom in other directions is restricted, so that the exhaust volute can expand freely in all directions without changing its center position when it expands due to heat.

[0019] According to one embodiment of the present invention, the heating device is a combustion heater, and the combustion heater is equipped with a fuel system.

[0020] The positive and progressive effects of the present invention are:

[0021] The main structural layout of the high-temperature turbine tester of the present invention has at least the following advantages:

[0022] 1. Since the heating method is changed from combustion chamber heating to electric heating, a more uniform temperature field and pressure field can be obtained. At the same time, the fuel system supporting combustion heating is cancelled, which improves the safety of the test and reduces the complexity of the system.

[0023] Second, since the intake volute is changed to the exhaust volute and placed after the turbine test piece, the outlet temperature of the turbine test piece is lower than the inlet temperature due to the expansion and work done by the turbine test piece. The operating temperature and pressure of the exhaust volute are lower, and lower-cost materials can be selected, while improving reliability and life.

[0024] 3. Since the electric heater is placed on a sliding guide rail and driven by a small motor, it is convenient for the installation and disassembly of the turbine test piece. At the same time, during the test, when the rectifier chamber and the turbine test piece expand due to heat, the electric heater can slide axially to absorb the thermal expansion and thus reduce stress.

[0025] 4. The axis of the electric heater and the exhaust volute remains unchanged when heated, ensuring that the main structure of the tester will not produce large deformation and stress, thus ensuring safety.

[0026] 5. It can be applied to turbine tester solutions where the inlet temperature of turbine test pieces reaches above 1000K. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always represent the same features, wherein:

[0028] Figure 1 Schematic diagram of the main structural layout of a turbine tester in the prior art.

[0029] Figure 2 It is a schematic diagram of the main structural layout of the high-temperature turbine tester of the present invention.

[0030] Figure 3 It is a schematic diagram of the heating device support structure of the main structure layout of the high-temperature turbine tester of the present invention.

[0031] Figure 4 It is a structural schematic diagram of the first side bracket in the exhaust volute support structure of the main structural layout of the high-temperature turbine tester of the present invention.

[0032] Figure 5 It is a structural schematic diagram of the second side bracket in the exhaust volute support structure of the main structural layout of the high-temperature turbine tester of the present invention.

[0033] Figure 6 It is a structural schematic diagram of a lower bracket in an exhaust volute support structure of a main structural layout of a high-temperature turbine tester of the present invention.

[0034] [Reference Signs]

[0035] Turbine Tester 100

[0036] Heating device 110

[0037] Electric heater 111

[0038] Combustion heater 112

[0039] Rectification room 120

[0040] Turbine test piece 130

[0041] Exhaust volute 140

[0042] Gas outlet side 141

[0043] Gearbox 150

[0044] Dynamometer 160

[0045] Support device 200

[0046] Heating device support structure 210

[0047] Heating device bracket 211

[0048] Sliding track 212

[0049] Motor 213

[0050] Supporting portion 214

[0051] Exhaust volute support structure 220

[0052] Side bracket 221

[0053] Lower bracket 222

[0054] First side bracket 223

[0055] Second side bracket 224

[0056] The first fixing portion 225

[0057] The second fixing portion 226

[0058] The third fixing portion 227

[0059] Long pipe 310

[0060] Intake volute 320

[0061] Exhaust pipe 330 DETAILED DESCRIPTION

[0062] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0063] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to preferred embodiments of the present invention, examples of which are shown in the accompanying drawings. Wherever possible, the same reference numerals will be used in all drawings to represent the same or similar parts. In addition, although the terms used in the present invention are selected from well-known and commonly used terms, some of the terms mentioned in the specification of the present invention may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description herein. In addition, it is required to understand the present invention not only by the actual terms used, but also by the meaning implied by each term.

[0064] like Figure 2 As shown, the present invention provides a main structural layout of a high-temperature turbine tester, including a turbine tester 100 and a supporting device 200.

[0065] The turbine tester 100 includes a heating device 110 , a rectifying chamber 120 , a turbine test piece 130 , an exhaust volute 140 , a gear box 150 , and a dynamometer 160 , which are sequentially connected in the axial direction.

[0066] The heating device 110 heats the passing airflow.

[0067] The rectifying chamber 120 is used to homogenize the non-uniform temperature field and pressure field.

[0068] The exhaust volute 140 changes the direction of the airflow from the axial direction to the radial direction for discharge.

[0069] The gear box 150 and the turbine test piece 130 are connected to the dynamometer 160 via the gear box 150 .

[0070] The dynamometer 160 controls the rotation speed of the turbine test piece 130 and absorbs the power generated by the turbine test piece 130 .

[0071] The supporting device 200 is disposed at the lower part of the turbine tester 100 and is used for fixing and supporting the turbine tester 100 .

[0072] The airflow is heated by the heating device 110, and the non-uniform temperature field and pressure field are made uniform by the rectifying chamber 120, so as to provide the turbine test piece 130 with gas of certain temperature, pressure and flow field uniformity. The airflow expands and does work by passing through the turbine test piece 130, and the temperature and pressure of the airflow are reduced to different degrees, and the direction of the airflow is changed from axial to radial through the exhaust volute 140 for discharge. The turbine test piece 130 is connected to the dynamometer 160 after being decelerated by the gear box 150. The rotation speed of the turbine test piece 130 can be controlled by the dynamometer 160, and the power generated by the turbine test piece 130 can be absorbed by the dynamometer 160.

[0073] The main structural layout of the high-temperature turbine tester of the present invention changes the intake volute 320 to an exhaust volute 140 and places it behind the turbine test piece 130. The temperature and pressure at the outlet of the turbine test piece 130 are reduced, the operating temperature and pressure of the volute are reduced, the material selection of the volute is easier, and the service life is longer. The gear box 150 and the dynamometer 160 are placed on the exhaust volute 140 side.

[0074] After the intake volute 320 is changed to the exhaust volute 140, since the turbine test piece 130 expands and does work, the outlet temperature of the turbine test piece 130 is lower than the inlet temperature, the exhaust volute 140 has a lower operating temperature and a lower operating pressure, and a lower cost material can be selected, while improving reliability and life.

[0075] The turbine tester 100 is a test device for evaluating the working characteristics of a turbine. The main structure is the main core equipment before and after the turbine test piece 130.

[0076] like Figure 2As shown, according to a preferred embodiment of the main structure layout of the high-temperature turbine tester of the present invention, the support device 200 includes a heating device support structure 210 and an exhaust volute support structure 220.

[0077] The heating device supporting structure 210 is disposed at the lower portion of the heating device 110 , and is used to fix and support the heating device 110 and absorb the thermal expansion of the heating device 110 .

[0078] The exhaust volute support structure 220 is disposed at the lower portion of the exhaust volute 140 , and is used to fix and support the exhaust volute 140 and absorb the thermal expansion of the exhaust volute 140 .

[0079] like Figure 2 As shown, according to a preferred embodiment of the main structure layout of the high-temperature turbine tester of the present invention, the heating device 110 is an electric heater 111, and the electric heater 111 is arranged horizontally.

[0080] The present invention changes the heating method from combustion chamber heating to electric heating, which can obtain a more uniform temperature field and pressure field, and at the same time eliminates the fuel system supporting combustion heating, thereby greatly improving the safety of the system and reducing the complexity of the system.

[0081] like Figure 2 and Figure 3 As shown, according to a preferred embodiment of the main structure layout of the high-temperature turbine tester of the present invention, the heating device support structure 210 includes a heating device bracket 211 and a sliding rail 212.

[0082] The heating device bracket 211 is installed at the lower part of the heating device 110, and supports the electric heater 111 at two locations in the front and rear in the axial direction.

[0083] The sliding rail 212 is disposed at the lower portion of the heating device bracket 211 so that the heating device bracket 211 can slide in the axial direction.

[0084] like Figure 2 and Figure 3 As shown, according to a preferred embodiment of the main structure layout of the high-temperature turbine tester of the present invention, the heating device support structure 210 also includes a motor 213, and the motor 213 is arranged on the sliding track 212. The motor 213 is connected to the heating device bracket 211, and the heating device bracket 211 is dragged by the motor 213 to slide axially on the sliding track 212.

[0085] like Figure 2 and Figure 3As shown, according to a preferred embodiment of the main structural layout of the high-temperature turbine tester of the present invention, the heating device bracket 211 is supported at a horizontal position of the axis of the shell of the electric heater 111, so that the shell of the electric heater 111 can expand freely in all directions without changing its center position when it expands due to heat.

[0086] As described above, the electric heater 111 as the heating device 110 is arranged horizontally, and the electric heater 111 is supported at the front and rear by a heating device bracket 211. A sliding guide rail is arranged at the lower end of the heating device bracket 211. The heating device bracket 211 can slide axially under the drag of a low-power motor 213, so as to reserve space for the installation and disassembly of the turbine test piece 130. The heating device bracket 211 is supported at a horizontal position of the axis of the shell of the electric heater 111. When the shell of the electric heater 111 expands due to heat, it can expand freely to the surroundings but will not change the center position.

[0087] The electric heater 111 is placed on a sliding guide rail and can be driven by a small motor 213. Sufficient space is reserved during the installation and disassembly of the turbine test piece 130 to facilitate the installation and disassembly of the turbine test piece 130. At the same time, during the test, when the rectifier chamber 120 and the turbine test piece 130 expand due to heat, the electric heater 111 can slide axially to absorb the thermal expansion and thus reduce stress.

[0088] The electric heater 111 is arranged horizontally, and the heating device bracket 211 is supported at a horizontal position of the shell axis of the electric heater 111. When the shell of the electric heater 111 expands due to heat, the center position will not change.

[0089] like Figure 3 As shown, two groups of four support parts 214 are provided on the heating device bracket 211, and each group of support parts 214 is fixed on the left and right sides of the shell of the electric heater 111, that is, on both sides of the Y-axis direction. The two groups of support parts 214 support the electric heater 111 in the axial direction, that is, at the front and rear of the X-axis direction.

[0090] like Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, according to a preferred embodiment of the main structural layout of the high-temperature turbine tester of the present invention, the exhaust volute support structure 220 includes a side bracket 221 and a lower bracket 222, and the side bracket 221 is fixedly connected to the shell on both sides of the exhaust volute 140 in the radial horizontal direction; the lower bracket 222 is fixedly connected to the bottom of the exhaust volute 140.

[0091] like Figure 2 , Figure 4 , Figure 5 and Figure 6As shown, according to a preferred embodiment of the main structural layout of the high-temperature turbine tester of the present invention, the side bracket 221 includes a first side bracket 223 and a second side bracket 224, the first side bracket 223 is fixedly connected to the shell on the opposite side of the gas outlet side 141 of the exhaust volute 140 in the radial horizontal direction; the second side bracket 224 is fixedly connected to the shell on the gas outlet side 141 of the exhaust volute 140.

[0092] like Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, according to a preferred embodiment of the main structure layout of the high-temperature turbine tester of the present invention, the exhaust volute support structure 220 uses a three-point unidirectional sliding support fixing method to fix and support the exhaust volute 140.

[0093] like Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, according to a preferred embodiment of the main structural layout of the high-temperature turbine tester of the present invention, the exhaust volute 140 can move in the radial horizontal direction along the first side bracket 223 and the second side bracket 224, and the degree of freedom in other directions is restricted; the exhaust volute 140 can move in the radial vertical direction along the lower bracket 222, and the degree of freedom in other directions is restricted, so that the exhaust volute 140 can expand freely in all directions without changing its center position when it expands due to heat.

[0094] As described above, the exhaust volute 140 adopts a three-point unidirectional sliding support fixing method. The exhaust volute 140 can move in the Y direction along the first side bracket 223 and the second side bracket 224, and the freedom in other directions is restricted. The exhaust volute 140 can move in the Z direction along the lower bracket 222, and the freedom in other directions is restricted, ensuring that the exhaust volute 140 can expand freely in all directions when heated but will not change the center position, and has a self-centering function for thermal expansion.

[0095] The exhaust volute 140 is fixed by a three-point one-way sliding support, so that the exhaust volute 140 has a self-centering function when it expands due to heat.

[0096] like Figure 4 As shown, a first fixing portion 225 is provided on the first side bracket 223 , and the first fixing portion 225 is fixedly connected to a shell on the opposite side of the gas outlet side 141 of the exhaust volute 140 in the radial horizontal direction.

[0097] like Figure 5 As shown, a second fixing portion 226 is provided on the second side bracket 224 , and the second fixing portion 226 is fixedly connected to the shell of the gas outlet side 141 of the exhaust volute 140 .

[0098] like Figure 6 As shown, a third fixing portion 227 is provided on the lower bracket 222 , and the third fixing portion 227 is fixedly connected to the bottom of the exhaust volute 140 .

[0099] The first fixing portion 225 , the second fixing portion 226 , and the third fixing portion 227 together constitute a three-point unidirectional sliding support fixing method.

[0100] Since the electric heater 111 and the exhaust volute 140 can maintain their axis unchanged when heated, it is ensured that the main structure of the high-temperature turbine tester 100 of the present invention will not produce large deformation and stress, thereby ensuring safety.

[0101] The main structural layout of the high-temperature turbine tester of the present invention can obtain a more uniform temperature field and pressure field, eliminate the fuel system, save space, reduce the operating temperature of the volute, and improve reliability and service life.

[0102] According to a preferred embodiment of the main structural layout of the high-temperature turbine tester of the present invention, the heating device 110 is a combustion heater 112, and the combustion heater 112 is equipped with a fuel system.

[0103] After the intake volute 320 is adjusted to the exhaust volute 140 and placed in the turbine test piece 130, the airflow will not form a swirl in the volute in front of the turbine test piece 130, and will not cause the total pressure unevenness and turbulence at the inlet of the turbine test piece 130 to increase, and will not affect the measurement of the total pressure at the inlet of the turbine test piece 130 and the evaluation of the test results. And after the intake volute 320 is adjusted to the exhaust volute 140, the temperature and pressure at the outlet of the turbine test piece 130 are reduced, the working temperature and pressure of the volute are reduced, the material selection of the volute is easier, and the service life is longer. Although the heating device 110 is best to use an electric heater 111, using a combustion heater 112 as the heating device 110 does not affect the solution of the above technical problems, so the technical solution of using a combustion heater 112 as the heating device 110 can be used as a suboptimal implementation.

[0104] The main structural layout of the high-temperature turbine tester of the present invention shortens the length of the pipeline, satisfies the uniform flow field condition at the inlet of the turbine test piece 130, and reduces the material cost and processing difficulty of the pipeline and the volute.

[0105] In summary, the main structural layout of the high-temperature turbine tester of the present invention has the following beneficial effects:

[0106] 1. Since the heating method is changed from combustion chamber heating to electric heating, a more uniform temperature field and pressure field can be obtained. At the same time, the fuel system supporting combustion heating is cancelled, which improves the safety of the test and reduces the complexity of the system.

[0107] Second, since the intake volute 320 is changed to the exhaust volute 140 and is placed after the turbine test piece 130, the outlet temperature of the turbine test piece 130 is lower than the inlet temperature due to the expansion and work of the turbine test piece 130, the operating temperature and pressure of the exhaust volute 140 are lower, and lower-cost materials can be selected, while improving reliability and lifespan.

[0108] 3. Since the electric heater 111 is placed on a slidable guide rail and driven by a small motor 213, the installation and disassembly of the turbine test piece 130 is convenient. At the same time, during the test, when the rectifier chamber 120 and the turbine test piece 130 expand due to heat, the electric heater 111 can slide axially to absorb the thermal expansion and thus reduce stress.

[0109] Fourth, the electric heater 111 and the exhaust volute 140 do not change their axis when heated, which ensures that the main structure of the tester will not produce large deformation and stress, thereby ensuring safety.

[0110] 5. A turbine tester 100 solution that can be applied to a turbine test piece 130 with an inlet temperature of 1000K or more.

[0111] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A main structure layout of a high temperature turbine tester, characterized in that: The structural layout includes a turbine tester and a supporting device, The turbine tester comprises a heating device, a rectifying chamber, a turbine test piece, an exhaust volute, a gear box and a dynamometer which are sequentially connected along the axial direction; The heating device heats the passing airflow; The rectifying chamber performs a homogenization process on the uneven temperature field and pressure field; The exhaust volute changes the direction of the airflow from axial to radial for discharge; The gear box, the turbine test piece is connected to the dynamometer through the gear box; The dynamometer controls the rotation speed of the turbine test piece and absorbs the power generated by the turbine test piece; The supporting device is arranged at the lower part of the turbine tester and is used for fixing and supporting the turbine tester.

2. The main structural layout of the high temperature turbine tester according to claim 1 is characterized in that: The supporting device comprises: A heating device support structure is arranged at the lower part of the heating device, and is used to fix and support the heating device and absorb the thermal expansion of the heating device; The exhaust volute support structure is arranged at the lower part of the exhaust volute, and is used for fixing and supporting the exhaust volute and absorbing the thermal expansion of the exhaust volute.

3. The main structural layout of the high temperature turbine tester according to claim 2 is characterized in that: The heating device is an electric heater, and the electric heater is arranged horizontally.

4. The main structural layout of the high temperature turbine tester according to claim 3 is characterized in that: The heating device support structure includes a heating device bracket and a sliding track. The heating device bracket is installed at the lower part of the heating device, supporting the electric heater at two locations in the front and rear in the axial direction; The sliding track is arranged at the lower part of the heating device bracket, so that the heating device bracket can slide in the axial direction.

5. The main structural layout of the high temperature turbine tester according to claim 4 is characterized in that: The heating device support structure also includes a motor, which is arranged on the sliding track and connected to the heating device bracket. The motor drags the heating device bracket to slide axially on the sliding track.

6. The main structural layout of the high temperature turbine tester according to claim 4 or 5, characterized in that: The heating device bracket is supported at a horizontal position of the axis center of the shell of the electric heater, so that the shell of the electric heater can expand freely in all directions without changing its central position when it expands due to heat.

7. The main structural layout of the high temperature turbine tester according to claim 2 is characterized in that: The exhaust volute support structure includes a side bracket and a lower bracket. The side bracket is fixedly connected to the shell on both sides of the exhaust volute in the radial horizontal direction; the lower bracket is fixedly connected to the bottom of the exhaust volute.

8. The main structural layout of the high temperature turbine tester according to claim 7 is characterized in that: The side bracket includes a first side bracket and a second side bracket, the first side bracket is fixedly connected to the shell on the opposite side of the gas outlet side of the exhaust volute in the radial horizontal direction; the second side bracket is fixedly connected to the shell on the gas outlet side of the exhaust volute.

9. The main structural layout of the high temperature turbine tester according to claim 8, characterized in that: The exhaust volute support structure adopts a three-point unidirectional sliding support fixing method to fix and support the exhaust volute.

10. The main structural layout of the high temperature turbine tester according to claim 9, characterized in that: The exhaust volute can move in the radial horizontal direction along the first side bracket and the second side bracket, and the freedom in other directions is restricted; the exhaust volute can move in the radial vertical direction along the lower bracket, and the freedom in other directions is restricted, so that the exhaust volute can expand freely in all directions without changing its central position when it expands due to heat.

11. The main structural layout of the high temperature turbine tester according to claim 1, characterized in that: The heating device is a combustion heater, and the combustion heater is equipped with a fuel system.

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