High-speed magnetic suspension generator performance test system

Abstract

The utility model provides a performance test system for a high-speed magnetic suspension generator, which comprises an impeller, a high-pressure air source for providing high-pressure air for the impeller to drive the impeller to rotate, and a control valve arranged on an air path between the high-pressure air source and the impeller and used for adjusting the air inflow of a turbine impeller, the impeller rotates to drive the generator rotor to rotate, and during testing, the rotating speeds of the impeller and the motor rotor can be adjusted by adjusting the air inflow of the impeller through the control valve; according to the utility model, high-pressure air is adopted to drive the impeller to rotate so as to drive the rotor of the magnetic suspension generator to rotate, such a driving mode effectively avoids the influence of mechanical contact on the control of a magnetic suspension bearing in a traditional motor twin trawling test, reduces the interference of mechanical vibration on the position of the rotor of the generator, and ensures the accuracy and stability of the test; moreover, the control valve can accurately adjust the air inflow of the turbine impeller, thereby achieving the continuous and stepless adjustment of the rotating speed of the generator, and meeting the requirements of the multi-characteristic test of the generator.

Description

TECHNICAL FIELD

[0001] The utility model relates to detection equipment technical field, especially a kind of high-speed magnetic suspension generator performance test system. BACKGROUND

[0002] With the continuous progress of science and technology, high-speed magnetic suspension generator, as an innovative motor technology, gradually emerges. Its unique lies in the precise control of rotor shaft center motion trajectory using electromagnetic force, realizing the contactless and frictionless operation mode, compared with traditional bearing motor, showing significant advantages, such as higher speed, lower power consumption and noise level. Therefore, high-speed magnetic suspension generator has wide application prospect in the field of turbine machinery, energy conversion, etc., especially can provide more stable and reliable operating environment for key equipment such as turboexpander.

[0003] Although some test systems and methods for magnetic suspension generator or motor have appeared in prior art, such as the test system and method of magnetic suspension blower disclosed by CN111734670B, and the performance test system of organic rankine cycle turboexpander generator set and the zero-leakage self-cooling magnetic suspension turboexpander generator and system and method disclosed by CN111206966A and CN107476833B, etc. Patents, but these technical solutions focus on performance test or power output in specific application scenarios, and do not fully solve the challenges faced by high-speed magnetic suspension generator in continuous test of output characteristics, no-load characteristics and external characteristics, etc.

[0004] Specifically, the existing test system often relies on mechanical counter-drag method, that is, another motor is connected with the motor to be tested for drag test. However, this method has significant defects when applied to magnetic suspension generator: the traditional motor counter-drag structure will adversely affect the precise control of magnetic suspension bearing, resulting in rotor out of control and even collision with auxiliary bearing, thereby damaging the equipment and affecting the accuracy of test results. In addition, the existing system is usually difficult to realize fine adjustment of generator speed, and cannot effectively match the speed and output power of generator, thereby limiting the feasibility and accuracy of test. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the technical problem that the traditional motor counter-drag structure in prior art will adversely affect the precise control of magnetic suspension bearing, resulting in rotor out of control and even collision with auxiliary bearing, thereby damaging the equipment and affecting the accuracy of test results.

[0006] To solve the above technical problems, the utility model provides a kind of high-speed magnetic suspension generator performance test system, it includes: impeller, the high-pressure air source for impeller provides high-pressure air to drive impeller rotation, control valve for adjusting turbine impeller intake size is arranged on the gas path between high-pressure air source and impeller, impeller is coaxially connected with generator rotor, impeller rotation can drive generator rotor rotation, when testing, the speed of impeller and motor rotor can be adjusted by adjusting the size of impeller intake through control valve.

[0007] Further, it further includes turbine expander, the high-pressure air of high-pressure air source is turbine expander working medium, and impeller is turbine impeller.

[0008] Further, the high-pressure air source includes compressor, and compressor is connected with turbine expander pipeline.

[0009] Further, it further includes gas storage tank, and gas storage tank is connected with the gas path pipeline between compressor and turbine expander.

[0010] Further, it further includes electric heater, and electric heater is arranged on the gas path between compressor and turbine expander, to make turbine expander inlet temperature stable.

[0011] Further, it further includes power test platform, and power test platform is electrically connected with generator, for real-time acquisition of current, voltage, electric power and other key parameters of generator in running state.

[0012] Further, it further includes PLC controller, control valve is electric control pneumatic valve, electric control pneumatic valve is electrically connected with PLC controller, and PLC controller adjusts the opening of electric control pneumatic valve according to the rotational speed and output power of the generator rotor to be measured, to adjust the rotational speed and power of generator.

[0013] Further, it further includes frequency converter electrically connected with PLC controller and motor to be measured, and PLC controller can issue test instruction to frequency converter to drive generator to work.

[0014] Further, the power test platform includes DC multifunction meter and AC multifunction meter, and DC multifunction meter and AC multifunction meter are electrically connected with PLC controller.

[0015] Further, it further includes first valve and second valve, and the gas path between compressor and turbine expander is first gas path, the gas path of gas storage tank to first gas path is second gas path, second gas path can converge into first gas path, first valve is arranged on first gas path and located between gas path intersection and turbine expander, and second valve is arranged on second gas path.

[0016] The utility model discloses the beneficial effect is: the utility model discloses high pressure air drive impeller rotation, and further drive the magnetic suspension generator rotor rotation, this drive mode effectively avoided the influence of traditional motor to the mechanical contact of the test to the magnetic suspension bearing control, reduced the mechanical vibration to the interference of generator rotor position, guaranteed the accuracy and stability of test, and control valve can accurate regulation turbine impeller's air intake, and further realize the continuous, stepless regulation of generator rotating speed, can satisfy the demand of generator's multiple characteristic test. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the schematic diagram of high speed magnetic suspension generator performance test system provided by the application. DETAILED DESCRIPTION

[0018] The typical embodiment embodying the features and advantages of the utility model will be described in detail in the following description. It should be understood that the utility model can have various changes on different embodiments, which are all within the scope of the utility model, and the description and drawings in the utility model are essentially used for description, not for limiting the utility model.

[0019] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0020] In order to further illustrate the principle and structure of the utility model, the preferred embodiments of the utility model will be described in detail in combination with the drawings.

[0021] Please refer to Figure 1The performance test system for the high-speed magnetic suspension generator provided by the embodiment comprises an impeller, a high-pressure air source, a generator (a magnetic suspension generator to be tested) and a power test table, the impeller is coaxially connected with a rotor of the generator, the high-pressure air source provides high-pressure air for the impeller to drive the impeller to rotate, the rotation of the impeller can drive the rotor of the generator to rotate, the power test table is electrically connected with the generator and is used for collecting key parameters such as current, voltage and electric power generated by the rotation of the rotor of the generator in real time; compared with the existing mode of dragging the rotor of the generator to rotate, the mode of driving the rotor of the generator to rotate by means of the high-speed airflow blowing the impeller can reduce the vibration acting on the rotor of the generator during the test, the reduced vibration can be controlled and offset by the magnetic bearing of the magnetic suspension generator, the rotor of the generator can be maintained at the central position, the adverse effects caused by the mechanical contact between the rotor and the magnetic suspension bearing are avoided, the influence of the vibration on the test result is reduced, and the feasibility and accuracy of the experiment are enhanced.

[0022] Further, the turbine expander is connected with the high-pressure air source, the impeller is a turbine impeller, the turbine impeller can maintain stability under high-speed rotation, and the smooth test and the accuracy of the result can be ensured.

[0023] The magnetic suspension generator has complex output characteristics, no-load characteristics and external characteristics, and needs to be continuously tested in a wide speed range.

[0024] Further, in order to realize stepless speed regulation of the generator to meet the multi-characteristic test requirement, the control valve CV-3 is arranged on the air path between the high-pressure air source and the impeller and is used for adjusting the air intake amount of the turbine impeller, so as to control the rotation speed of the turbine impeller and the rotor of the generator. The control valve CV-3 can be manually adjusted by an operator or automatically adjusted by the PLC controller described below. The rotation speed of the rotor of the generator is adjusted by adjusting the air intake amount, stepless speed regulation of the rotor of the generator is realized, the speed regulation mode is more flexible than the traditional drag mode, the rotation speed change can be more accurately controlled, and the test requirement under different working conditions can be met.

[0025] Further, the high-pressure air source is a compressor, the compressor is connected with the turbine expander pipeline, the compressor compresses low-pressure air outside into high-pressure air, and the requirement of the turbine expander for air intake pressure is met.

[0026] Further, the gas storage tank is connected with the air path pipeline between the compressor and the turbine expander, and high-pressure gas is stored in the gas storage tank. This helps to ensure that the turbine expander can stably operate during the test and avoid affecting the test result due to air pressure fluctuation.

[0027] The gas path between the compressor and the turbine expander is a first gas path, and the gas path between the gas tank and the first gas path is a second gas path.

[0028] Further, the first valve CV-1 and the second valve CV-2 are further included, the first valve CV-1 is arranged on the first gas path and located between the gas path intersection and the turbine expander, and the second valve CV-2 is arranged on the second gas path. Before testing, the first valve CV-1 needs to be closed and the second valve CV-2 needs to be opened, so that the compressor compresses the gas and stores the high-pressure gas in the high-pressure gas tank, thereby ensuring stable supply of the test gas source. During testing, the first valve CV-1 and the second valve CV-2 need to be opened.

[0029] In a low-temperature environment, water vapor in high-pressure gas is easy to condense and freeze, which will adversely affect the normal operation of the turbine expander.

[0030] Further, the electric heater is arranged on the gas path between the compressor and the turbine expander, and the electric heater can adjust the temperature of the gas entering the turbine expander to ensure that it can be kept within a stable temperature range under different working conditions. By increasing the temperature of the gas, the electric heater can effectively prevent water vapor from freezing and ensure the normal operation of the turbine expander in a low-temperature environment, which helps to more accurately evaluate the performance parameters of the magnetic suspension generator, and can also reduce the thermal stress of the equipment caused by temperature changes, thereby prolonging the service life of the turbine expander and its related components.

[0031] Further, the PLC controller is further included, the control valve CV-3 is preferably an electrically controlled pneumatic valve, the electrically controlled pneumatic valve is electrically connected with the PLC controller, the PLC controller adjusts the opening degree of the electrically controlled pneumatic valve according to the measured generator rotor speed and output power, thereby adjusting the generator speed and power. The operator can input the power to be tested to the PLC controller before testing, and the control system issues instructions to the electrically controlled pneumatic valve to control the gas flow entering the turbine expander, so that the turbine expander reaches the design speed of the generator, and the actual output power of the generator is measured through the power test platform. The test system can also test the generator power at different speeds, thereby obtaining the characteristic curve of the motor.

[0032] Further, the touch screen is further included, the touch screen is electrically connected with the PLC controller, and the operator can input the power to be tested in the touch screen interface of the touch screen.

[0033] Further, the power test platform comprises a direct current multifunction meter and an alternating current multifunction meter, both of which are electrically connected with the PLC controller; the direct current multifunction meter can be used to directly measure the direct current and voltage output by the generator, and further calculate the direct current output power; and the alternating current multifunction meter can measure the alternating current component of the output voltage and current of the generator, as well as the active power, reactive power and other parameters.

[0034] Further, the power test platform comprises a direct current multifunction meter and an alternating current multifunction meter, both of which are electrically connected with the PLC controller; the direct current multifunction meter can be used to directly measure the direct current and voltage output by the generator, and further calculate the direct current output power; and the alternating current multifunction meter can measure the alternating current component of the output voltage and current of the generator, as well as the active power, reactive power and other parameters.

[0035] Further, the power test platform comprises a direct current multifunction meter and an alternating current multifunction meter, both of which are electrically connected with the PLC controller; the direct current multifunction meter can be used to directly measure the direct current and voltage output by the generator, and further calculate the direct current output power; and the alternating current multifunction meter can measure the alternating current component of the output voltage and current of the generator, as well as the active power, reactive power and other parameters.

[0036] As an embodiment parallel to the present application, the test system provided by the present application can not only measure the performance of the magnetic suspension generator, but also can be used to measure the performance of the magnetic suspension motor. For example, to measure the performance of the magnetic suspension motor, the first valve CV-1 can be disconnected, the control valve CV-3 can be replaced by a flow meter, the turbo expander can be replaced by a centrifugal compressor, and a thermometer and a pressure gauge can be used to monitor the working medium state parameters at the inlet and outlet of the centrifugal compressor in real time. During the test, the PLC can issue a test instruction to the frequency converter to drive the motor to work, and the performance parameters of the motor can be obtained according to the consumed power and the working medium state parameters at the inlet and outlet of the compressor.

[0037] Although the present application has been described with reference to several exemplary embodiments, it will be understood that the terms used are intended to be illustrative and not limiting. As the present application can be embodied in many different forms, it will be understood that the embodiments described above are not limited to any one of the details of the foregoing description, but are to be interpreted in the broadest sense allowable by the appended claims and their equivalents, so that all changes and modifications coming within the scope of the claims or their equivalents are intended to be embraced therein.

Claims

1. A high speed maglev generator performance test system, characterized in that, The turbine wheel is coaxially connected with the generator rotor, and rotation of the turbine wheel can drive the generator rotor to rotate.

2. The high-speed maglev generator performance test system of claim 1, wherein, The turbine expander is driven by high-pressure air from the high-pressure air source.

3. The high-speed maglev generator performance test system of claim 2, wherein, The high-pressure air source comprises a compressor, which is connected with the turbine expander through a pipeline.

4. The high-speed maglev generator performance test system of claim 3, wherein, The gas tank is connected with the compressor and the turbine expander through a pipeline.

5. The high-speed maglev generator performance test system of claim 4, wherein, The electric heater is arranged on the pipeline between the compressor and the turbine expander, so as to stabilize the inlet temperature of the turbine expander.

6. The high-speed maglev generator performance test system of claim 1, wherein, The power test platform is electrically connected with the generator, and is used for collecting current, voltage and electric power of the generator in real time.

7. The high-speed maglev generator performance test system of claim 6, wherein, The control valve is an electrically-controlled pneumatic valve, which is electrically connected with the PLC controller.

8. The high-speed maglev generator performance test system of claim 7, wherein, The PLC controller can send test instructions to the frequency converter to drive the generator to work.

9. The high-speed maglev generator performance test system of claim 7, wherein, The power test platform comprises a DC multifunction meter and an AC multifunction meter, both of which are electrically connected with the PLC controller.

10. The high-speed maglev generator performance test system of claim 4, wherein, The first valve is arranged on the first pipeline and located between the pipeline intersection and the turbine expander, and the second valve is arranged on the second pipeline.

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