Testing device for testing comprehensive performance of gas compressor and turbine

Abstract

The invention belongs to the technical field of gas compressor and turbine performance testing, and particularly relates to a testing device for gas compressor and turbine comprehensive performance testing, which comprises a gas compressor, a turbine and a measurement and control system, and is characterized in that the gas compressor comprises a driving motor I, a coupler, an exhaust volute and an exhaust pipe I; an electric adjusting valve and a flow meter are installed in the first exhaust pipe, a first rapid air discharging pipe is connected to the lower portion of the first exhaust pipe, and a rapid air discharging valve is arranged in the first rapid air discharging pipe; the right end of the first exhaust pipe is connected with a switching valve, the right side of the switching valve is connected with a second exhaust pipe, an auxiliary pipeline is connected between the upper portion of the switching valve and the turbine, the turbine comprises a second driving motor and a cone blocking system, the right side of the cone blocking system is connected with a third exhaust pipe, and the upper portion of the turbine is connected with a fourth exhaust pipe. The device solves the problem that the current gas compressor and turbine characteristic test needs to be separated, so that the test cost is increased.

Description

Technical Field

[0001] The invention belongs to the technical field of compressor and turbine performance testing, and in particular relates to a test device for comprehensive performance testing of compressors and turbines. Background Art

[0002] At present, when universities or scientific research institutions conduct performance research on micro-sized aircraft engine compressor and turbine components, they lack targeted test equipment, or can only use large engine test benches to conduct relevant tests, resulting in slow progress in scientific research, distorted data, and increased costs of test equipment;

[0003] When switching between the two tests, attention should be paid to the leakage of compressed air, which will greatly reduce the test accuracy. This phenomenon has become a problem that needs to be solved urgently by people in this field. Summary of the invention

[0004] The object of the present invention is to provide a test device for testing the comprehensive performance of a compressor and a turbine to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a test device for comprehensive performance testing of compressors and turbines, comprising a compressor, a turbine and a measurement and control system, the compressor comprising a driving motor 1, a coupling, an exhaust volute and an exhaust pipe 1, an electric regulating valve and a flow meter are installed inside the exhaust pipe 1, a quick air release pipe 1 is connected to the bottom of the exhaust pipe 1, and a quick air release valve is arranged in the quick air release pipe 1; a switching valve is connected to the right end of the exhaust pipe 1, an exhaust pipe 2 is connected to the right side of the switching valve, a secondary pipeline is connected between the switching valve and the turbine, the turbine comprises a driving motor 2 and a blocking cone system, an exhaust pipe 3 is connected to the right side of the blocking cone system, an exhaust pipe 4 is connected to the top of the turbine, and a quick air release pipe 2 is connected to the top of the exhaust pipe 4; the measurement and control system comprises a measurement and control cabinet, a pressure sensor, a temperature sensor and a speed sensor, the measurement and control cabinet is respectively connected to the compressor and turbine signals, and the signals are divided into control signals and test signals.

[0006] The present invention further illustrates that the switching valve includes an electric motor, an output shaft, a disc, a slide rail, a slider, a connecting rod, a screw, a sleeve rod and a sealing plug; the electric motor is fixedly installed on the inner wall of the switching valve, the disc is fixedly connected to the output end of the motor through the output shaft, the slide rail is fixedly installed on the surface of the disc, the slider is slidably connected in the slide rail and is fixed by the connecting rod and the screw, a threaded hole is provided at one end of the sleeve rod, and the screw is threadedly connected in the threaded hole, the sealing plug is fixedly installed on the outer end of the sleeve rod, and the sealing plug is made of silicone; after the motor rotates forward, the sealing plug blocks the exhaust pipe two, and after the motor is reset and then rotated reversely, the exhaust pipe two is opened and the auxiliary air pipe is closed.

[0007] The present invention further illustrates that a hydraulic chamber is fixed on the left side of the inner wall of the switching valve, a hydraulic plate is slidably connected to the inner wall of the hydraulic chamber, a hydraulic rod is fixed on the right side of the hydraulic plate, and the left end of the hydraulic rod is spherical; an extrusion rod is fixed on the left side of the slider, the left end of the extrusion rod is spherical, and contacts with the hydraulic rod after rotation, and a spring is fixed between the slider and the left side of the inner wall of the slide rail.

[0008] The present invention further illustrates that the left side of the hydraulic chamber is connected to an external hydraulic pump pipeline, and the left side of the hydraulic plate is filled with magnetorheological fluid.

[0009] The present invention further illustrates that a pressure control module is disposed inside the external hydraulic pump, and the pressure control module is used to adjust the pressure applied by the external hydraulic pump to the magnetorheological fluid.

[0010] The present invention further illustrates that an elastic expansion joint is fixed to the bottom of the inner wall of the switching valve, a tooth plate is fixed to the upper end of the elastic expansion joint, a gear is fixed to the outer side of the sleeve rod, and after the elastic expansion joint is extended, the gear and the tooth plate are meshed with each other; the elastic expansion joint is connected to the right side of the hydraulic chamber by two pipes, and a pressure valve is arranged in one of the pipes, and an electric control valve is arranged in the other pipe, and the elastic expansion joint is connected to the external control valve pipe.

[0011] The present invention further illustrates that a support rod is fixed to the left side of the elastic expansion joint, and a magnetic block is fixed to the left end of the support rod.

[0012] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention tests the free switching of the turbine and the compressor, and the test accuracy is guaranteed. When the turbine characteristic test is performed, the slider drives the extrusion rod to rotate around the center of the disc until the extrusion rod and the hydraulic rod contact each other and squeeze the hydraulic rod. The spring is deformed by force, thereby generating a force, so that the pressure of the sealing plug on the right side of the switching valve is increased, thereby improving the sealing strength, further preventing the leakage of compressed air, and improving the test accuracy. By applying pressure to the magnetorheological fluid on the left side of the hydraulic plate, the pressure applied by the sealing plug on the right side of the switching valve is increased, and the sealing performance is further improved.

[0013] As the characteristic tests of the turbine and compressor are switched, the sealing plug will be worn after multiple operations. At this time, the pressure applied to the magnetorheological fluid can be freely adjusted. The more serious the wear, the greater the pressure applied to the magnetorheological fluid, to avoid the reduction of sealing due to wear, thereby ensuring the sealing and ensuring the accuracy of the characteristic test of the turbine. When the sealing plug is seriously worn, the sealing plug is screwed into the exhaust pipe 2, which greatly improves the sealing of the exhaust pipe 2, fully blocks the exhaust pipe 2, fully prevents the leakage of compressed air, and can fully utilize the sealing plug, reducing the replacement cost of the sealing plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the switching valve structure of the present invention;

[0017] Figure 3 is a diagram of the initial state of the internal structure of the switching valve of the present invention;

[0018] Figure 4 is a plan view of the switching valve of the present invention;

[0019] Figure 5 It is a schematic diagram of the connection relationship between the sleeve and the screw of the present invention;

[0020] Figure 6 It is a schematic diagram of the pipeline connection relationship between the hydraulic chamber and the expansion joint of the present invention;

[0021] Figure 7 It is a schematic diagram of the state of the switching valve when testing the compressor characteristics of the present invention;

[0022] Figure 8 is a schematic diagram of the switching valve state when testing turbine characteristics of the present invention;

[0023] In the figure: 1. compressor; 11. drive motor 1; 12. coupling; 13. exhaust volute; 14. exhaust pipe 1; 141. electric regulating valve; 15. quick exhaust pipe 1; 151. quick exhaust valve; 16. exhaust pipe 2; 17. auxiliary air pipe; 2. turbine; 21. plugging cone system; 22. exhaust pipe 3; 23. exhaust pipe 4; 24. quick exhaust pipe 2; 3. switching valve; 31. motor; 32. output shaft; 33. disc; 34. sealing plug; 35. slide rail; 351. slider; 352. connecting rod; 353. screw; 354. sleeve rod; 355. extrusion rod; 356. gear; 36. hydraulic chamber; 361. hydraulic plate; 362. hydraulic rod; 37. spring; 38. telescopic joint; 381. tooth plate; 382. support rod; 383. magnetic block; 5. measurement and control cabinet. DETAILED DESCRIPTION

[0024] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 8 The present invention provides a technical solution: a test device for comprehensive performance testing of a compressor and a turbine, comprising a compressor 1, a turbine 2 and a measurement and control system, wherein the compressor 1 comprises a driving motor 11, a coupling 12, an exhaust volute 13 and an exhaust pipe 14, wherein an electric regulating valve 141 and a flow meter 142 are installed inside the exhaust pipe 14, a quick air release pipe 15 is connected below the exhaust pipe 14, and a quick air release valve 151 is arranged inside the quick air release pipe 15;

[0026] The right end of the exhaust pipe 14 is connected to the switching valve 3, the right side of the switching valve 3 is connected to the exhaust pipe 2 16, the upper part of the switching valve 3 is connected to the turbine 2 with a secondary pipe 17, the turbine 2 includes a driving motor 2 and a blocking cone system 21, the right side of the blocking cone system 21 is connected to the exhaust pipe 3 22, the upper part of the turbine 2 is connected to the exhaust pipe 4 23, and the upper part of the exhaust pipe 4 23 is connected to the quick exhaust pipe 2 24;

[0027] The measurement and control system includes a measurement and control cabinet 5, a pressure sensor, a temperature sensor and a speed sensor. The measurement and control cabinet 5 is respectively connected to the compressor 1 and the turbine 2, and the signals are divided into control signals and test signals.

[0028] The compressor 1 can work alone and is used for the characteristic test of the compressor 1. Turn on the power of the measurement and control cabinet 5. After the equipment is powered on, set the relevant parameters on the touch screen interface and start the drive motor 11. The drive motor 11 transmits torque to the motor shaft through the coupling 12 to drive the tested compressor 1 to rotate. The compressed air enters the exhaust pipe 14 through the exhaust volute 13. The flow rate of the pipeline is changed by adjusting the opening of the electric regulating valve 141, so as to measure the flow rate, temperature, pressure, speed and other parameters of the compressor 1 under different opening conditions. Then, the relevant parameters are calculated by the software, and different images are generated, so as to finally obtain the performance of the tested compressor 1. At the same time, the working characteristics of the compressor 1 are obtained by measuring the inlet and outlet aerodynamic parameters of the test compressor 1 and the output power of the drive motor 11.

[0029] The compressor 1 can also work together with the turbine 2, serving as the air supply source of the test turbine to drive the turbine to operate. The test turbine drives the compressor 1 to perform a turbine characteristic test, and the turbine operating characteristics are obtained by measuring the inlet and outlet aerodynamic parameters of the test turbine and the compressor 1; the measurement and control system is used to adjust and control the test operating conditions of the test impeller and measure the aerodynamic parameters during the test to obtain the operating characteristics of the test impeller. When the compressor 1 is working, by opening the switching valve 3, the compressed air of the compressor 1 enters the switching valve 3 through the exhaust pipe 1 14. At this time, the exhaust pipe 2 16 is blocked, and the gas enters the turbine 2 through the auxiliary pipeline 17, driving the turbine to rotate. At the same time, by driving the second motor to adjust the axial position of the blocking cone in the blocking cone system 21, the turbine rotor operating condition can be changed quickly and conveniently. When the turbine 2 is working, various sensors are used to collect temperature, pressure, speed and other data, and then the relevant parameters are calculated by the software, and different images are generated to finally obtain the performance of the tested turbine;

[0030] 1. Targeted to small engines, the data is more accurate;

[0031] 2. A complete set of dedicated testing, data processing, control and display software has been developed for the research of micro-engines. The software is programmed using LabVIEW and displays the collected data in both numerical and image channels;

[0032] 3. The structure and function are modularly designed, and the control adopts an integrated design. The compressor module can work alone or as a power source for the turbine module, which has high economic benefits;

[0033] 4. The operation, display and test device main body are separated to ensure the safety of operators and observers;

[0034] 5. Safety design is carried out for possible surge during the test to ensure the safety of the test bench;

[0035] 6. The control is designed with software and hardware dual channels to ensure safety;

[0036] 7. Noise reduction and heat insulation design are carried out in the heat source part;

[0037] 8. A precise transmission design with a motor as the power source is designed under high temperature environment above 700℃, which can convert the rotation of the motor into precise displacement of the plugging cone.

[0038] The switching valve 3 includes a motor 31, an output shaft 32, a disc 33, a slide rail 35, a slider 351, a connecting rod 352, a screw rod 353, a sleeve rod 354 and a sealing plug 34;

[0039] The motor 31 is fixedly mounted on the inner wall of the switching valve 3, the disc 33 is fixedly connected to the output end of the motor 31 through the output shaft 32, the slide rail 35 is fixedly mounted on the surface of the disc 33, the slider 351 is slidably connected in the slide rail 35, and is fixed to the screw 353 through the connecting rod 352, a threaded hole is opened at one end of the sleeve rod 354, and the screw 353 is threadedly connected in the threaded hole, and the sealing plug 34 is fixedly mounted on the outer end of the sleeve rod 354, and the sealing plug 34 is made of silicone;

[0040] After the motor 31 rotates forward, the sealing plug 34 blocks the exhaust pipe 2 16. After the motor 31 is reset and then rotates reversely, the exhaust pipe 2 16 is opened and the auxiliary air pipe 17 is closed.

[0041] During the characteristic test of the compressor 1, the driving motor 31 rotates counterclockwise by 45 degrees, and the disc 33 is driven to rotate through the output shaft 32, and the disc 33 drives the slide rail 35 to rotate around its center, and the screw 353 is driven to rotate through the connecting rod 352, and the screw 353 drives the sealing plug 34 to rotate around the center of the disc 33 through the sleeve rod 354, so that the sealing plug 34 blocks the auxiliary air pipe 17. At this time, the compressed air in the exhaust pipe 14 enters the switching valve 3, and is then discharged through the exhaust pipe 2 16, and the auxiliary air pipe 17 is blocked by the sealing plug 34;

[0042] During the turbine characteristic test, the driving motor 31 rotates 45 degrees clockwise, so that the sealing plug 34 blocks the exhaust pipe 16. The compressed air in the exhaust pipe 14 enters the auxiliary air pipe 17 through the switching valve 3, and then enters the turbine 2 through the auxiliary air pipe 17. By blocking the exhaust pipe 16, a sealing effect is achieved to prevent the compressed air from leaking from the exhaust pipe 16, thereby improving the data accuracy of the turbine characteristic test and improving the test quality.

[0043] The test turbine 2 and compressor 1 can be switched freely, and the test accuracy is guaranteed.

[0044] A hydraulic chamber 36 is fixed to the left side of the inner wall of the switching valve 3, a hydraulic plate 361 is slidably connected to the inner wall of the hydraulic chamber 36, a hydraulic rod 362 is fixed to the right side of the hydraulic plate 361, and the left end of the hydraulic rod 362 is spherical;

[0045] A squeezing rod 355 is fixed to the left side of the slider 351. The left end of the squeezing rod 355 is spherical and contacts the hydraulic rod 362 after rotation. A spring 37 is fixed between the slider 351 and the left side of the inner wall of the slide rail 35.

[0046] When conducting a turbine characteristic test, the slider 351 drives the extrusion rod 355 to rotate around the center of the disk 33 until the extrusion rod 355 contacts the hydraulic rod 362 and squeezes the hydraulic rod 362. The spring 37 is deformed by the force, thereby generating a force, which increases the pressure of the sealing plug 34 on the right side of the switching valve 3, thereby improving the sealing strength and further preventing the leakage of compressed air to improve the test accuracy.

[0047] The left side of the hydraulic chamber 36 is connected to an external hydraulic pump pipeline, and the left side of the hydraulic plate 361 is filled with magnetorheological fluid;

[0048] When conducting a turbine characteristic test, the extrusion rod 355 and the hydraulic rod 362 contact and squeeze each other. At this time, the external hydraulic pump runs to apply pressure to the magnetorheological fluid on the left side of the hydraulic plate 361, thereby increasing the pressure applied by the sealing plug 34 to the right side of the switching valve 3, further improving the sealing performance.

[0049] A pressure control module is provided inside the external hydraulic pump, and the pressure control module is used to adjust the pressure applied by the external hydraulic pump to the magnetorheological fluid;

[0050] As the characteristic tests of the turbine 2 and the compressor 1 are switched, the sealing plug 34 is worn after multiple operations. At this time, the pressure applied to the magnetorheological fluid can be freely adjusted. The more severe the wear, the greater the pressure applied to the magnetorheological fluid, to avoid a reduction in sealing due to wear, thereby ensuring sealing and ensuring the accuracy of the characteristic test of the turbine 2.

[0051] An elastic expansion joint 38 is fixed to the bottom of the inner wall of the switching valve 3, a tooth plate 381 is fixed to the upper end of the elastic expansion joint 38, a gear 356 is fixed to the outer side of the sleeve rod 354, and after the elastic expansion joint 38 is extended, the gear 356 and the tooth plate 381 are meshed with each other;

[0052] The elastic expansion joint 38 is connected to the right side of the hydraulic chamber 36 by two pipes, one of which is provided with a pressure valve, the other is provided with an electric control valve, and the elastic expansion joint 38 is connected to the external control valve pipe;

[0053] When the sealing plug 34 is seriously worn, the applied pressure on the magnetorheological fluid is relatively large, so that the hydraulic plate 361 slides to the right along the inner wall of the hydraulic chamber 36 to increase, so that the gas pressure on the right side of the hydraulic plate 361 increases, until the pressure valve opens, and the electric control valve is closed at the same time, the external control valve is closed, and air enters the elastic expansion joint 38 through the pipeline, causing it to stretch, drive the toothed plate 381 to move upward, and mesh with the gear 356, driving the gear 356 to rotate slightly, and the gear 356 drives the sleeve rod 354 to rotate through the bearing, and the sleeve rod 354 rotates and moves to the right side in the direction of the screw 353 through the threaded hole, so that the sealing plug 34 is screwed into the exhaust pipe 16, greatly improving the sealing of the exhaust pipe 16, fully blocking the exhaust pipe 16, and fully preventing the leakage of compressed air. In addition, the sealing plug 34 can be fully utilized, and the replacement cost of the sealing plug 34 is reduced;

[0054] When the compressor 1 characteristic test is performed, the electric control valve and the external control valve are opened, the internal pressure of the elastic expansion joint 38 returns to normal, the elastic expansion joint 38 is reset, and the sealing plug 34 releases the exhaust pipe 2 16 .

[0055] A support rod 382 is fixed to the left side of the elastic expansion joint 38, and a magnetic block 383 is fixed to the left end of the support rod 382;

[0056] After the elastic expansion joint 38 is extended, the support rod 382 drives the magnet block 383 to move upward, and the distance between the magnet block 383 and the magnetorheological fluid is shortened, thereby exerting a magnetic force on the magnetorheological fluid. When an external magnetic field is applied, the magnetic particles are rapidly magnetized and form a chain structure along the direction of the magnetic field, causing the fluid to change from a liquid state to a Bingham fluid state with high viscosity and low fluidity, providing support force for the hydraulic plate 361. At this time, the external hydraulic pump can be turned off to reduce energy consumption, thereby reducing operating costs without affecting the sealing.

[0057] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0058] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A test device for comprehensive performance testing of a compressor and a turbine, comprising a compressor (1), a turbine (2) and a measurement and control system, characterized in that: The compressor (1) comprises a driving motor (11), a coupling (12), an exhaust volute (13) and an exhaust pipe (14); an electric regulating valve (141) and a flow meter (142) are installed inside the exhaust pipe (14); a quick air release pipe (15) is connected below the exhaust pipe (14), and a quick air release valve (151) is arranged inside the quick air release pipe (15); The right end of the exhaust pipe 1 (14) is connected to a switching valve (3), the right side of the switching valve (3) is connected to an exhaust pipe 2 (16), a secondary pipe (17) is connected between the top of the switching valve (3) and the turbine (2), the turbine (2) comprises a driving motor 2 and a blocking cone system (21), the right side of the blocking cone system (21) is connected to an exhaust pipe 3 (22), the top of the turbine (2) is connected to an exhaust pipe 4 (23), and the top of the exhaust pipe 4 (23) is connected to a quick exhaust pipe 2 (24); The measurement and control system comprises a measurement and control cabinet (5), a pressure sensor, a temperature sensor and a rotation speed sensor. The measurement and control cabinet (5) is respectively connected to the compressor (1) and the turbine (2) by signals, and the signals are divided into control signals and test signals.

2. A test device for comprehensive performance testing of compressor and turbine according to claim 1, characterized in that: The switching valve (3) comprises a motor (31), an output shaft (32), a disc (33), a slide rail (35), a slider (351), a connecting rod (352), a screw rod (353), a sleeve rod (354) and a sealing plug (34); The motor (31) is fixedly mounted on the inner wall of the switching valve (3); the disc (33) is fixedly connected to the output end of the motor (31) via the output shaft (32); the slide rail (35) is fixedly mounted on the surface of the disc (33); the slider (351) is slidably connected to the slide rail (35) and is fixed to the screw rod (353) via the connecting rod (352); a threaded hole is formed at one end of the sleeve rod (354), and the screw rod (353) is threadedly connected to the threaded hole; the sealing plug (34) is fixedly mounted on the outer end of the sleeve rod (354); and the sealing plug (34) is made of silicone; When the motor (31) rotates forward, the sealing plug (34) blocks the second exhaust pipe (16); when the motor (31) is reset and then rotated reversely, the second exhaust pipe (16) is opened and the auxiliary air pipe (17) is closed.

3. A test device for comprehensive performance testing of compressor and turbine according to claim 2, characterized in that: A hydraulic chamber (36) is fixed on the left side of the inner wall of the switching valve (3), a hydraulic plate (361) is slidably connected to the inner wall of the hydraulic chamber (36), a hydraulic rod (362) is fixed on the right side of the hydraulic plate (361), and the left end of the hydraulic rod (362) is spherical; A squeezing rod (355) is fixed on the left side of the slider (351). The left end of the squeezing rod (355) is spherical and contacts the hydraulic rod (362) after rotation. A spring (37) is fixed between the slider (351) and the left side of the inner wall of the slide rail (35).

4. A test device for comprehensive performance testing of compressor and turbine according to claim 3, characterized in that: The left side of the hydraulic chamber (36) is connected to an external hydraulic pump pipeline, and the left side of the hydraulic plate (361) is filled with magnetorheological fluid.

5. A test device for comprehensive performance testing of compressor and turbine according to claim 4, characterized in that: A pressure control module is arranged inside the external hydraulic pump, and the pressure control module is used to adjust the pressure applied by the external hydraulic pump to the magnetorheological fluid.

6. A test device for comprehensive performance testing of compressor and turbine according to claim 5, characterized in that: An elastic expansion joint (38) is fixed to the bottom of the inner wall of the switching valve (3), a toothed plate (381) is fixed to the upper end of the elastic expansion joint (38), a gear (356) is fixed to the outer side of the sleeve rod (354), and after the elastic expansion joint (38) is extended, the gear (356) and the toothed plate (381) are meshed with each other; The elastic expansion joint (38) is connected to the right side of the hydraulic chamber (36) via two pipelines, one of which is provided with a pressure valve, and the other is provided with an electric control valve. The elastic expansion joint (38) is connected to an external control valve pipeline.

7. A test device for comprehensive performance testing of compressor and turbine according to claim 6, characterized in that: A support rod (382) is fixed to the left side of the elastic expansion joint (38), and a magnetic block (383) is fixed to the left end of the support rod (382).

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