Multifunctional turbine system comprehensive experiment table and method

Abstract

The invention provides a multifunctional turbine system comprehensive experiment table and method, the multifunctional turbine system comprehensive experiment table comprises a steam generation system, an electric control system, a turbine structure, a dynamic balance rotor structure, a damping unit, a sensor and a data acquisition system, the steam generation system is used for providing high-temperature and high-pressure gas; the electric control system is used for providing power; the turbine structure is used for converting kinetic energy of high-temperature and high-pressure gas provided by the steam generation system into mechanical energy; the dynamic balance rotor structure is used for carrying out dynamic balance calibration; the damping unit is used for providing damping for the dynamic balance rotor structure; according to the invention, various complex working conditions can be simulated, and synchronous monitoring and comprehensive analysis of different parts of the turbine system are realized, so that reliable technical support is provided for industrial production and equipment maintenance.

Description

Technical Field

[0001] The invention belongs to the field of turbine machinery, and in particular relates to a multifunctional turbine system comprehensive test bench and method. Background Art

[0002] As a core component of energy conversion equipment, turbine machinery plays an important role in many industrial fields such as energy, aviation, and machinery manufacturing. Turbine systems are widely used in key equipment such as power generation, steam turbines, gas turbines, and aircraft engines by converting thermal energy and kinetic energy into mechanical energy. With the continuous advancement of industrial technology, the operating conditions of turbine systems are becoming more and more complex, and their efficiency, stability, and safety have become particularly important. However, existing turbine test benches and test platforms have certain limitations in many aspects and cannot fully meet the needs of turbine system performance and fault analysis.

[0003] At present, the research on turbine system performance is mostly limited to single working condition simulation and static testing, lacking a comprehensive analysis of the complex operating status under actual working conditions. Especially under high temperature and high pressure conditions, bearing failure problems inside the turbine system are often difficult to accurately monitor and diagnose in a timely manner. This limitation not only affects the overall performance optimization of the turbine system, but also increases the potential safety hazards in the operation of the equipment. In addition, the traditional test bench has a low degree of integration in simulation, data acquisition and analysis, and cannot meet the comprehensive testing needs under multi-function and multi-working conditions.

[0004] During the operation of the turbine system, the bearing is a key rotating support component, and its state directly affects the overall performance of the system. Bearing wear, vibration and failure will not only cause equipment shutdown, but may also lead to serious safety accidents. Therefore, early detection and prediction of bearing failures are the key to improving equipment reliability and extending service life. However, the existing bearing fault diagnosis technology is mostly experiments under simple rotating structures, and there is no case to simulate bearing failures under turbine structures. It is impossible to monitor the coupling data of bearing vibration and flow field, resulting in high uncertainty in the diagnosis results. In traditional bearing fault diagnosis experiments, the test bench usually only simulates the operating state of the bearing under normal temperature and pressure and single working conditions. Although this type of experiment can capture the vibration characteristics of the bearing, it lacks the complex operating environment in the turbine system and cannot reflect the actual fault performance of the bearing under high temperature, high pressure and complex flow field. The bearings in the turbine system not only bear complex rotating loads, but also directly couple with high temperature and high pressure gas and flow field. The fluid kinetic energy and thermal energy have a significant impact on the operating condition of the bearing. Therefore, in the turbine system, the failure form of the bearing is more complex and changeable, and conventional fault diagnosis methods are difficult to deal with.

[0005] Especially in high-speed rotating turbine structures, bearing vibration is not only caused by mechanical factors, but also affected by fluid dynamics factors. The strong interaction between blades and bearings, as well as the impact of high-speed airflow on temperature, pressure and flow state in the turbine system, will lead to a coupling effect between bearing vibration and flow field. This complex dynamic coupling phenomenon cannot be simulated under traditional experimental conditions, and it is also an area that is difficult to study in depth with existing technologies. Due to the lack of research on this coupling relationship, existing bearing fault diagnosis technology is usually unable to accurately capture the vibration mode of the bearing under complex working conditions, resulting in uncertainty and risk of misjudgment in the diagnosis results.

[0006] Furthermore, the coupling effect of the flow field on the bearing not only affects the vibration, but also changes the load distribution, temperature field and lubrication state of the bearing. These factors work together to accelerate the wear and failure process of the bearing, and even cause the bearing to fail prematurely. However, current diagnostic technologies usually only focus on the mechanical vibration characteristics of the bearing, fail to consider the interference of flow field factors, and ignore the impact of bearing vibration and flow field coupling on the development of faults. This severely limits the application of traditional vibration monitoring methods in complex turbine systems, making it difficult to achieve early warning and accurate diagnosis of faults.

[0007] In addition, in turbine machinery systems, the mixed flow of different working fluids (such as gas-liquid, gas-gas mixture) will lead to complex flow and thermal field distribution in the system. This complexity is reflected in the interacting mechanical and thermodynamic properties, which leads to vibration and instability of the system and even affects the operating efficiency and reliability of the turbine. Studying the vibration-induced characteristics of mixed working fluids can better understand and predict the sources of these vibration phenomena and effectively control the stability of the system. Therefore, how to study the dynamic characteristics of turbine systems under various working conditions and compare and analyze experimental data with simulation results has become an important research topic in this field. Summary of the invention

[0008] The purpose of the present invention is to provide a multifunctional turbine system comprehensive test bench and method, which solves the defects of the existing test benches for turbine systems in terms of simulation, data acquisition and analysis, which have low integration and cannot meet the comprehensive testing requirements under multi-functions and multiple working conditions.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is: The present invention provides a multifunctional turbine system comprehensive test bench, comprising a steam generation system, an electric control system, a turbine structure, a dynamic balance rotor structure, a damping unit, a sensor and a data acquisition system, wherein: The steam generation system is used to provide high-temperature and high-pressure gas; The electronic control system is used to provide power; The turbine structure is used to convert the kinetic energy of the high-temperature and high-pressure gas provided by the steam generation system into mechanical energy; The dynamic balancing rotor structure is used for dynamic balancing calibration; The damping unit is used to provide damping to the dynamically balanced rotor structure.

[0010] Preferably, the electric control system comprises a motor bracket, a motor base is arranged on the motor bracket, a motor is arranged on the motor base, and an output shaft of the motor is connected to the turbine structure via a coupling.

[0011] Preferably, the turbine structure includes moving blades, stationary blades, a turbine structure shaft, a casing, a side cover and a turbine structure bracket, wherein: A shell is installed on the turbine structure bracket, a turbine structure shaft is installed in the inner cavity of the shell, and a stationary blade and a moving blade are mounted on the turbine structure shaft; The stationary blades are arranged on a side away from the electric control system, and the moving blades are arranged on a side close to the electric control system; An air outlet is provided on the side cover of the housing close to the electronic control system; An air inlet is provided on the side cover of the housing away from the electronic control system, and the air inlet is connected to the steam generating system; A horizontal bearing seat is installed on the side cover of the housing away from the electronic control system, and the rotating shaft of the turbine structure passes through the horizontal bearing seat and is connected with the dynamic balance rotor structure through a coupling.

[0012] Preferably, the stator blade has a bearing mounted on the rotating shaft on one side away from the electronic control system and fixed by a retaining spring, the retaining spring is sleeved on the rotating shaft of the turbine structure and fixed by a shaft shoulder on the other side; The moving blade is fixed by a locking nut on one side close to the electronic control system, and is fixed by a shaft shoulder on the other side.

[0013] Preferably, the dynamically balanced rotor structure comprises a rotor structure bracket, on which two parallel vertical bearing seats are fixedly mounted by bolts; the two vertical bearing seats are connected by a rotor structure shaft; A dynamic balancing disc is mounted on the rotor structure shaft; One end of the rotor structure shaft is connected to the damping unit through a coupling.

[0014] Preferably, the dynamic balancing disc is axially fixed to the shaft shoulder by a locking nut. Preferably, the damping unit comprises a damper bracket, a magnetic powder damper is mounted on the damper bracket, and the magnetic powder damper is connected to the dynamic balancing rotor structure through a coupling.

[0015] Preferably, the sensor and data acquisition system includes a vibration sensor, a temperature sensor and a torque sensor, wherein: The vibration sensors are provided with two, and the two vibration sensors are respectively installed on the horizontal bearing seat and the vertical bearing seat to collect the vibration signal of the bearing seat; The torque sensor is mounted on a torque sensor bracket, and both ends are connected to the damping unit and the dynamic balancing rotor structure through couplings, respectively, for collecting rotation speed and output torque.

[0016] Preferably, it also includes a sensor and a data acquisition system, wherein the sensor and the data acquisition system are used to collect vibration information of the bearing seat, temperature change signal of the turbine system and torque of the rotor.

[0017] A multifunctional turbine system comprehensive experimental method, based on the experimental platform, can carry out axial flow characteristic experiments, mixed working fluid induced vibration characteristic experiments, turbine dynamic performance test experiments and bearing fault simulation experiments.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a multifunctional turbine system comprehensive test bench, which is formed by a steam generation system, an electric control system, a turbine structure, a dynamic balance rotor structure and a damping unit. By controlling the fluid flow and pressure of the steam generation system, the rotation speed of the electric control system and the resistance of the damping unit, it is possible to carry out axial flow characteristic experiments, mixed working fluid induced vibration characteristic experiments, turbine dynamic performance test experiments, and bearing fault simulation experiments. Multi-dimensional data collection and analysis can not only fill the gap in the prior art, but also provide an important test bench and research tool for performance optimization and fault diagnosis of the turbine system. This multifunctional test bench can simulate a variety of complex working conditions, realize synchronous monitoring and comprehensive analysis of different components of the turbine system, and thus provide reliable technical support for industrial production and equipment maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of an embodiment of the present invention; Among them, 1. platform, 2. damper bracket; 3. magnetic powder damper; 4. coupling; 5. torque sensor bracket; 6. torque sensor; 7. coupling; 8. bolt; 9. vertical bearing seat, 10. dynamic balancing rotor structure shaft, 11. locking nut, 12. dynamic balancing disk, 13. dynamic balancing rotor bracket, 14. coupling, 15. horizontal bearing seat bolt, 16. horizontal bearing seat, 17. M8 bolt, 18. M8 nut, 19. turbine structure bracket, 20. retaining spring, 21. static pressure plate, 22. moving blade, 23. locking nut, 24. turbine structure shaft, 25. casing, 26. side cover, 27. coupling, 28. motor seat, 29. motor, 30. motor bracket, 31. motor starter. DETAILED DESCRIPTION

[0020] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0021] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0022] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0023] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0024] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0025] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0026] Example 1 This embodiment provides a multifunctional turbine system comprehensive test bench, which can study the dynamic characteristics of turbine machinery, simulate turbine system bearing failures, and study the impact of complex working conditions on rolling bearings.

[0027] Specifically, it includes the steam generation system, electronic control system, turbine structure, dynamic balance rotor structure, sensor and data acquisition system, and damping unit. Each part plays a key role in providing support for the smooth progress of the experiment, including: The steam generation system is the core power source for providing different working conditions. It is used to provide high-temperature and high-pressure gas, provide a stable supply for turbine experiments, and ensure that the test bench operates under different working conditions, thereby simulating various real working environments.

[0028] The electronic control system is the power source for the bearing fault simulation experiment, and is mainly composed of a voltage-stabilized power supply, a motor driver, and a motor. The electronic control system precisely controls the speed of the motor to ensure that the turbine system can operate stably at the set speed. By adjusting the speed of the motor, the turbine performance under different load and speed conditions can be simulated, and its impact on bearing vibration can be studied. At the same time, the electronic control system also has a voltage stabilization function to ensure voltage stability during the experiment to avoid interference with the experimental results due to voltage fluctuations.

[0029] The turbine structure is a key part of the test bench, and is mainly composed of positioning structures such as the first-stage moving blades, stationary blades, a rotating shaft, and a casing. The stationary blades are mainly used to guide and control the flow direction of the gas, and accelerate the airflow by adjusting the shape and area of ​​the flow channel so that the airflow can impact the moving blades at the optimal angle and optimal flow rate, thereby improving the energy conversion efficiency of the moving blades. The moving blades are key components in the turbine system. Their main function is to convert the kinetic energy of the steam or gas guided by the stationary blades into mechanical energy, thereby driving the rotor to rotate and drive the operation of the entire steam turbine. This structure simulates the operating state of the actual turbine system. The rotating shaft is supported by bearings and can generate axial flow motion in order to study the dynamic characteristics of the axial flow turbine. The casing is used to close the experimental environment to ensure the safety of the experiment and the accuracy of data acquisition.

[0030] The dynamic balancing rotor structure is composed of a coupling, a dynamic balancing rotor disc, a shaft, a bearing seat, etc. The dynamic balancing rotor disc is the core component of the rotor structure and plays a role in adjusting the mass distribution. By performing dynamic balancing calibration on the rotor disc, the centrifugal force and vibration generated during the rotation process can be effectively reduced to ensure the smooth operation of the system.

[0031] Sensors and data acquisition systems: 1.) Siemens LMS monitoring system, the acceleration sensor collects the vibration signal of the bearing seat, and the temperature sensor monitors the temperature change signal of the turbine system; 2.) Torque and speed sensor: the torsional torque and speed on the rotating shaft.

[0032] The damping unit is used to provide damping to the dynamically balanced rotor structure.

[0033] Example 2 On the basis of Example 1, this example provides a multifunctional turbine system comprehensive test bench, wherein the electric control system includes a motor bracket 30, a motor base 28 is provided on the motor bracket 30, a motor 29 is provided on the motor base 28, and the output shaft of the motor 29 is connected to the turbine structure via a coupling 27.

[0034] A motor controller 31 is disposed in front of the motor seat 30 , and the motor controller 31 is control-connected to the motor 29 .

[0035] Example 3 On the basis of Example 1, this embodiment provides a multifunctional turbine system comprehensive test bench, wherein the turbine structure includes a moving blade 22, a stationary blade 21, a turbine structure shaft 24, a casing 25, a side cover 26 and a turbine structure bracket 19, wherein: A shell 25 is installed on the turbine structure support 19 , a turbine structure shaft 24 is installed in the inner cavity of the shell 25 , and a stationary blade 21 and a moving blade 22 are mounted on the turbine structure shaft 24 .

[0036] The stationary blades 21 are arranged away from the electric control system, and the moving blades 22 are arranged close to the electric control system.

[0037] The stator blade 21 has a bearing installed inside and is fixed by a retaining spring 20 on one side of the rotating shaft away from the electronic control system. The retaining spring 20 is sleeved on the rotating shaft 24 of the turbine structure and is fixed by a shaft shoulder on the other side.

[0038] The moving blade 22 is fixed by a locking nut 23 on one side close to the electronic control system, and is fixed by a shaft shoulder on the other side.

[0039] A gas outlet is provided on the side cover 26 of the housing 25 close to the electric control system and connected to a gas collecting device.

[0040] An air inlet is provided on the side cover of the housing 25 away from the electronic control system, and the air inlet is connected to the steam generating system; at the same time, the air inlet is also connected to a gas cylinder. In this embodiment, the gas cylinder contains carbon dioxide gas.

[0041] A horizontal bearing seat is installed on the side cover of the housing 25 away from the electronic control system. The turbine structure shaft 24 passes through the horizontal bearing seat 16 and is connected to the dynamic balance rotor structure through the coupling 14.

[0042] Example 4 On the basis of Example 1, this example provides a multifunctional turbine system comprehensive test bench, wherein the dynamically balanced rotor structure includes a rotor structure bracket 13 , and two parallel vertical bearing seats 9 are fixedly mounted on the rotor structure bracket 13 by bolts 8 .

[0043] The two vertical bearing seats 9 are connected via a rotor structure shaft 10 .

[0044] The rotor structure shaft 12 is provided with a dynamic balancing disc 7 , and the dynamic balancing disc 12 is axially fixed to the shaft shoulder via a locking nut 11 .

[0045] One end of the rotor structure shaft 12 is connected to the damping unit via a coupling 8 .

[0046] Example 5 On the basis of Example 1, this example provides a multifunctional turbine system comprehensive test bench, wherein the damping unit includes a damper bracket 2, a magnetic powder damper 3 is mounted on the damper bracket 2, and the magnetic powder damper 3 is connected to the dynamically balanced rotor structure through a coupling.

[0047] Example 6 On the basis of Example 1, this embodiment provides a multifunctional turbine system comprehensive test bench, wherein the sensor and data acquisition system include a vibration sensor, a temperature sensor and a torque sensor, wherein: There are two vibration sensors, which are respectively mounted on the horizontal bearing seat 16 and the vertical bearing seat 9 to collect vibration signals of the bearing seats.

[0048] The torque sensor 6 is mounted on the torque sensor bracket 5, and both ends are connected to the damping unit and the dynamic balancing rotor structure through couplings, so as to collect the rotation speed and output torque.

[0049] Example 7 This embodiment provides a comprehensive experimental method for a multifunctional turbine system, comprising the following steps: 1. Axial flow characteristics experiment: By precisely controlling the flow and pressure of steam, the test bench can simulate the axial flow characteristics of the turbine system under various operating conditions.

[0050] Step 1: Connect the motor 22 to the turbine structure, connect the steam generation system to the turbine structure through the inlet and outlet pipes, and pass gas to perform a sealing test to ensure the sealing of the structure, install flow meters, speed, pressure and other sensors and test systems; Step 2: Start the motor and gradually adjust its speed, start the steam generation system to introduce high-temperature and high-pressure gas into the turbine structure, measure the flow rate and flow velocity of the fluid flowing through the equipment, record the static pressure at the inlet and outlet, and record the temperature changes of the fluid before and after the equipment and during operation.

[0051] Step 3: Use the steam generation system to adjust the inlet pressure and temperature, and adjust the motor speed to repeat the experiment multiple times under different working conditions.

[0052] Step 4: Analyze the experimental data and process the results.

[0053] (II) Experiment on vibration-induced characteristics of mixed working fluid: The mixed working fluid is introduced into the turbine system, and the induced vibration behavior under different working conditions (such as temperature, pressure, and vibration excitation) is tested. The experimental results under different temperature, pressure, induced vibration frequency and other conditions are compared to determine the factors that significantly affect the induced vibration characteristics.

[0054] Step 1: Connect the motor 22 to the turbine structure, connect the steam generation system to the turbine structure through the inlet and outlet pipes, and pass gas to perform a sealing test to ensure the sealing of the structure, install flow meters, speed, pressure and other sensors and test systems; Step 2: Introduce a certain proportion of CO2 and water vapor mixed working fluid to apply induced vibration disturbance to simulate external interference in the actual working environment.

[0055] Step 3: Measure the pressure, flow rate, temperature and vibration response of the mixed working fluid under different vibration-inducing conditions. The flow-induced vibration characteristics can be monitored by spectrum analysis equipment.

[0056] Step 4: Data analysis and result processing.

[0057] (III) Turbine power performance test experiment: High-temperature and high-pressure gas passes through the turbine system. By installing a torque sensor on the turbine shaft, the torque changes are monitored and recorded in real time. The performance of the turbine is evaluated by analyzing the relationship between the measured torque and other parameters.

[0058] Step 1: Connect the motor 22 to the turbine structure, connect the steam generation system to the turbine structure through the inlet and outlet pipes, and pass gas to perform a sealing test to ensure the structural sealing. Connect the torque speed sensor after the turbine system. Install flow meters, speed, pressure and other sensors and test systems; Step 2: Introduce high-temperature and high-pressure gas through the steam generation system and use the torque sensor to monitor the output torque Step 3: Adjust the turbine speed and flow rate in sequence, and repeat the measurement and recording process to obtain performance data under different operating conditions.

[0059] Step 4: Data analysis and result processing.

[0060] (IV) Bearing failure simulation experiment: The test bench can operate in an environment that simulates bearing failures and monitor bearing vibration changes in real time through sensors, providing a data set of experimental conditions that is more in line with actual working conditions for the study of bearing fault diagnosis methods and the analysis of the impact of fluids on bearing vibration signals.

[0061] Step 1: Connect the test bench as shown in the attached figure, connect the steam generating system to the turbine structure through the inlet and outlet pipes, and pass gas to perform a sealing test to ensure the sealing of the structure.

[0062] Step 2: Replace the bearing of the bearing seat of the turbine structure with a faulty bearing to simulate a fault, and replace the bearing of one side of the bearing seat of the dynamic balancing structure with a faulty bearing to simulate a fault. Install acceleration sensors and test system monitoring on the bearing seats with simulated faults to obtain vibration signals.

[0063] Step 3: Turn on the motor and steam generation system. Simulate various bearing failure conditions and record vibration data.

[0064] Step 4: Adjust the inlet pressure, temperature and motor speed, conduct multiple experiments under different working conditions, and record multiple sets of experimental data to create a data set.

[0065] In addition to the above experiments, this test bench can also perform dynamic balancing, rotor misalignment and other experiments.

[0066] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such 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 application, and should all be included in the protection scope of the present application.

Claims

1. A multifunctional turbine system comprehensive test bench, characterized in that: It includes a steam generation system, an electric control system, a turbine structure, a dynamically balanced rotor structure and a damping unit, wherein: The steam generation system is used to provide high-temperature and high-pressure gas; The electronic control system is used to provide power; The turbine structure is used to convert the kinetic energy of the high-temperature and high-pressure gas provided by the steam generation system into mechanical energy; The dynamic balancing rotor structure is used for dynamic balancing calibration; The damping unit is used to provide damping to the dynamically balanced rotor structure.

2. A multifunctional turbine system comprehensive test bench according to claim 1, characterized in that: The electric control system comprises a motor support, a motor seat is arranged on the motor support, a motor is arranged on the motor seat, and an output shaft of the motor is connected to a turbine structure through a coupling.

3. The multifunctional turbine system comprehensive test bench according to claim 1 is characterized in that: The turbine structure includes moving blades, stationary blades, a turbine structure shaft, a casing, a side cover and a turbine structure bracket, wherein: A shell is installed on the turbine structure bracket, a turbine structure shaft is installed in the inner cavity of the shell, and a stationary blade and a moving blade are mounted on the turbine structure shaft; The stationary blades are arranged on a side away from the electric control system, and the moving blades are arranged on a side close to the electric control system; An air outlet is provided on the side cover of the housing close to the electronic control system; An air inlet is provided on the side cover of the housing away from the electronic control system, and the air inlet is connected to the steam generating system; A horizontal bearing seat is installed on the side cover of the housing away from the electronic control system, and the rotating shaft of the turbine structure passes through the horizontal bearing seat and is connected with the dynamic balance rotor structure through a coupling.

4. A multifunctional turbine system comprehensive test bench according to claim 3, characterized in that: The stator blade has a bearing installed on the rotating shaft away from the electronic control system and is fixed by a retaining spring. The retaining spring is sleeved on the rotating shaft of the turbine structure and is fixed by a shaft shoulder on the other side. The moving blade is fixed by a locking nut on one side close to the electronic control system, and is fixed by a shaft shoulder on the other side.

5. The multifunctional turbine system comprehensive test bench according to claim 1 is characterized in that: The dynamically balanced rotor structure comprises a rotor structure bracket, on which two parallel vertical bearing seats are fixedly mounted by bolts; the two vertical bearing seats are connected by a rotor structure shaft; A dynamic balancing disc is mounted on the rotor structure shaft; One end of the rotor structure shaft is connected to the damping unit through a coupling.

6. A multifunctional turbine system comprehensive test bench according to claim 5, characterized in that: The dynamic balancing disc is axially fixed to the shaft shoulder via a locking nut.

7. The multifunctional turbine system comprehensive test bench according to claim 1 is characterized in that: The damping unit comprises a damper bracket, a magnetic powder damper is mounted on the damper bracket, and the magnetic powder damper is connected to the dynamic balancing rotor structure through a coupling.

8. The multifunctional turbine system comprehensive test bench according to claim 1 is characterized in that: The sensor and data acquisition system includes a vibration sensor, a temperature sensor and a torque sensor, wherein: The vibration sensors are provided with two, and the two vibration sensors are respectively installed on the horizontal bearing seat and the vertical bearing seat to collect the vibration signal of the bearing seat; The torque sensor is mounted on a torque sensor bracket, and both ends are connected to the damping unit and the dynamic balancing rotor structure through couplings, respectively, for collecting rotation speed and output torque.

9. The multifunctional turbine system comprehensive test bench according to claim 1 is characterized in that: It also includes sensors and a data acquisition system, which are used to collect vibration information of the bearing seat, temperature change signals of the turbine system and torque of the rotor.

10. A comprehensive experimental method for a multifunctional turbine system, characterized in that: The test bench according to any one of claims 1 to 9 can carry out axial flow characteristic experiments, mixed medium induced vibration characteristic experiments, turbine dynamic performance test experiments and bearing fault simulation experiments.

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