Electromagnetic pump performance testing device

Abstract

The utility model relates to the technical field of electromagnetic pump, concretely is a kind of electromagnetic pump performance testing device, including the support of installation electromagnetic pump, the test tube of the non-magnetic conductive material of good electrically conductive material is inserted annular flow passage of electromagnetic pump;Test tube is coaxially arranged with annular flow passage through the support frame of both ends;Test tube tail end is fixedly connected with force sensor through adjusting bolt.Compared with prior art, through testing non-magnetic and good electrically conductive solid test tube, eddy current is induced to receive axial force, reflect the thrust size generated by electromagnetic pump core electromagnetic component, without high-temperature liquid metal, electromagnetic pump axial force performance parameter can be measured quickly and accurately, solve the problem of high test cost, long cycle caused by dependence on high-temperature liquid metal test bench, and low precision of measuring instrument under high-temperature environment, poor reliability, cannot accurately verify the accuracy of design calculation.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic pump technology, specifically to an electromagnetic pump performance testing device. Background Technology

[0002] Three-phase cylindrical induction electromagnetic pumps are special conveying devices that rely on the principle of electromagnetic induction to drive the medium. When the three-phase winding coils are energized, they generate an alternating magnetic field, which interacts with the induced electromagnetic field on the liquid metal, producing an axial thrust that propels the liquid metal to flow stably. Compared to traditional mechanically driven pumps, this type of electromagnetic pump has significant advantages due to the absence of moving mechanical parts, including high operational reliability, low vibration amplitude during long-term operation, low noise levels, and long maintenance cycles. However, to ensure that the conveying performance of the electromagnetic pump under actual working conditions matches the design calculations, comprehensive performance testing is required during the research and development phase and before delivery to verify the accuracy of the design parameters.

[0003] Chinese invention patent CN108361187A discloses a comprehensive performance testing system for electromagnetic pumps and its usage method. This system can test various parameters of the electromagnetic pump, including flow rate and head characteristics under different power levels and system resistances, allowable sodium temperature, heating power of the electromagnetic pump on liquid sodium at different power levels, and flow rate and head under long-term operating conditions. However, because liquid metals (such as sodium, potassium, lead-bismuth alloys, mercury, etc.) are solid at room temperature and require high temperatures to melt and remain liquid, verifying the performance of electromagnetic pumps often necessitates the construction of expensive, complex, and time-consuming high-temperature liquid metal test benches. This severely restricts the efficiency and cost of electromagnetic pump development. Furthermore, the instruments used for measuring high-temperature media often suffer from low accuracy and poor reliability, leading to inaccurate measurement data.

[0004] Therefore, there is an urgent need for an electromagnetic pump performance testing device that can circumvent the limitations of high-temperature operating conditions and achieve rapid and accurate acquisition of electromagnetic pump performance to verify the accuracy of design calculations. Utility Model Content

[0005] This invention provides an electromagnetic pump performance testing device that, without the need for high-temperature liquid metal, can quickly and accurately measure the axial force performance parameters of an electromagnetic pump. This achieves efficient verification of the related performance parameters, axial thrust, and material properties of the electromagnetic pump, providing reliable support for the design optimization and performance iteration of electromagnetic pumps. It addresses the problems of high testing costs and long testing cycles caused by relying on high-temperature liquid metal test benches in existing three-phase cylindrical induction electromagnetic pump performance testing, as well as the low accuracy and poor reliability of measuring instruments under high-temperature environments, which makes it impossible to accurately verify the accuracy of design calculations.

[0006] Another objective of this invention is to precisely solve the spatial interference problem of the connecting block of the electromagnetic pump groove by combining the circumferentially open groove of the test tube with an adjustable coaxial support. This design not only avoids obstacles from fixed structures, but also achieves coaxiality calibration between the aluminum tube and the pump groove through fine adjustment of the height of the supports at both ends, ensuring uniform magnetic field distribution.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: an electromagnetic pump performance testing device, comprising a support for mounting the electromagnetic pump, a test tube made of a non-magnetic, highly conductive material inserted into the annular flow channel of the electromagnetic pump; the test tube is coaxially arranged with the annular flow channel via support frames at both ends; the tail end of the test tube is fixedly connected to a force sensor via adjusting bolts. This structure creatively mounts a non-magnetic, highly conductive solid-state test tube coaxially with the electromagnetic pump flow channel, and directly couples the test tube to a high-precision force sensor via adjusting bolts in a rigid connection manner, successfully transforming the complex performance testing of liquid metal pumps into precise solid-state mechanical measurements. The overall structure balances installation stability, testing accuracy, and ease of operation, enabling low-cost, high-precision acquisition of electromagnetic pump axial force performance data.

[0008] Preferably, the test tube has three circumferentially open slots to accommodate the connecting block within the annular flow channel. These slots prevent structural interference between the test tube and the connecting block when the test tube is inserted into the flow channel, ensuring smooth installation and maintaining coaxiality with the flow channel, and guaranteeing uniform magnetic field application to the test tube. They also prevent localized compression deformation or force displacement of the test tube due to interference, avoid radial force interference, and ensure lossless transmission of axial force to the force sensor. Simultaneously, they maximize the symmetry and stiffness uniformity of the tube structure.

[0009] Preferably, a low-friction bushing is provided between the test tube and the support frame; the support frame is fixed on the support, and an adjusting shim is provided between the support frame and the support. The low-friction bushing can reduce the frictional resistance when the test tube slides, avoiding thrust transmission loss; the adjusting shim can finely adjust the height of the support frame, accurately ensuring the coaxiality of the test tube and the annular flow channel. The two work together to ensure accurate axial force measurement.

[0010] Preferably, the adjusting bolt has a T-shaped cross-section with bolt holes on the shoulder for fixed connection to the test tube; the tail is an externally threaded screw that precisely engages with the force sensor via threads. The T-shaped structure provides a large contact surface between the adjusting bolt and the test tube, and the bolt connection provides a stable mounting reference surface and connection strength. The precise thread engagement ensures the rigidity of the force transmission path, and this structure provides a stable and repeatable zero-adjustment reference for the entire measurement system.

[0011] Preferably, the force sensor is fixed to the sensor support by bolts; a gap is left between the adjusting bolt and the sensor support. The force sensor is coaxially positioned with the test tube and the annular flow channel through the sensor support; the reserved gap can prevent the sensor support from exerting radial constraint on the adjusting bolt and prevent interference with the transmission of axial force.

[0012] Preferably, the force sensor has bidirectional tensile and compressive measurement capabilities and is connected to a secondary instrument. Bidirectional measurement can cover the different axial force testing requirements of the electromagnetic pump under forward and reverse operating conditions; connection to the secondary instrument enables real-time data display and recording, improving testing efficiency and data accuracy.

[0013] Preferably, a temperature sensor is installed on the surface of the test tube, and multiple temperature sensors are installed on the electromagnetic pump winding coil. The temperature sensors are connected to the secondary instrument. Temperature monitoring of the test tube can be used to analyze the influence of resistivity on thrust; temperature monitoring of the winding coil can provide timely warnings of equipment overheating risks; the secondary instrument enables simultaneous monitoring of multiple temperature points, ensuring test safety and data integrity. It can provide key parameters for performance analysis and provide timely warnings in case of abnormal temperatures, preventing equipment overheating damage.

[0014] Preferably, the upper surface of the support is horizontal, and the lower surface is welded and fixed to the ground; a safety baffle is provided on the side of the support away from the force sensor. The horizontal upper surface of the support provides a flat and stable installation reference for the upper components such as the electromagnetic pump and support frame, avoiding the deviation of the coaxiality between the test tube and the annular flow channel due to the tilt of the installation surface, and ensuring accurate transmission of axial force; the lower surface is welded and fixed to the ground, with strong connection rigidity and no risk of loosening, which can eliminate the displacement or vibration of the support during testing, ensure the stability of the overall device, and reduce the interference of vibration on the force sensor data; the safety baffle on the side away from the force sensor can form physical protection in case the test tube accidentally flies out, protecting the operator and surrounding equipment, and does not affect the zeroing and data reading operations on the sensor side, thus balancing testing safety and operational convenience.

[0015] Preferably, the electromagnetic pump is connected to a frequency converter via a cable, and the frequency converter is equipped with a multi-function meter. The frequency converter can flexibly adjust the supply voltage and frequency to simulate multiple working conditions; the multi-function meter can monitor electrical parameters such as voltage, current, and frequency in real time, facilitating the establishment of the correlation between axial force and electrical parameters, and supporting performance analysis.

[0016] Preferably, the test tube is made of aluminum alloy. Aluminum alloy has the dual advantages of excellent electrical conductivity to ensure sufficient induced electromagnetic force to simulate induced eddy currents in liquid metal, and non-magnetic properties to avoid interfering with the magnetic field and ensure accurate axial force. It also has the engineering practicality of low cost and easy processing, making it easy to open circumferential openings to fit connecting blocks, significantly improving mechanical strength and durability. This allows the test tube to maintain structural stability under repeated installation and high-temperature testing conditions, thus balancing measurement accuracy and service life.

[0017] The beneficial effects of this utility model are as follows: This device ingeniously reflects the thrust performance of an electromagnetic pump by measuring the core mechanical quantity of "axial force". The device has a simple structure and is easy to operate. As a highly efficient R&D tool, it greatly improves R&D efficiency, reduces early trial and error costs, and has great commercial and engineering value.

[0018] The test tube, made of a non-magnetic conductive material at room temperature, replaces the high-temperature liquid metal, eliminating the need for a complex high-temperature liquid metal circulation system, shortening the test cycle, and significantly reducing test costs.

[0019] By employing high-precision force sensors and meters to directly measure core parameters at room temperature, the problem of low measurement accuracy and poor reliability of high-temperature pressure transmitters is avoided, thus improving data reliability.

[0020] There are no risks associated with high temperatures or flammable liquid metals. The system ensures operational safety through multiple protection systems, including safety barriers and electrical protection. Software-based control reduces human intervention, and operators can learn to use the system with simple training, making it safe and convenient to operate.

[0021] This device integrates electrical, mechanical, and thermal parameter measurements and can perform multi-dimensional testing by changing the phase sequence and tube thickness, providing comprehensive and accurate data support for the design verification of electromagnetic pumps. It boasts comprehensive functions and abundant measured data. By changing the phase sequence of the electromagnetic pump and the thickness of the test tube, multiple sets of experimental data can be obtained, enabling better verification of the design accuracy.

[0022] By replacing the test tubes with different outer diameters and thicknesses, it can be adapted to induction electromagnetic pumps with different inner diameters, eliminating the need to design separate test devices for different pump models, thus demonstrating strong adaptability. Attached Figure Description

[0023] Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 for Figure 2 A magnified view of a portion of the image; Figure 4 This is a structural diagram of the test tube of this utility model; In the diagram: 1. Electromagnetic pump; 11. Annular flow channel; 12. Connecting block; 2. Support; 3. Test tube; 31. Opening slot; 4. Support frame; 41. Bushing; 42. Adjusting shim; 5. Force sensor; 6. Sensor support; 7. Adjusting bolt; 8. Safety baffle; 9. Temperature sensor. Detailed Implementation

[0024] The essence of a three-phase induction cylindrical electromagnetic pump driving liquid metal is that the traveling wave magnetic field generated by the three-phase alternating current connected to the coil winding interacts with the induced current in the liquid metal fluid, producing a Lorentz force along the axial direction of the liquid metal flow channel, thereby driving the liquid metal fluid to flow axially. All the external output performance of the electromagnetic pump, such as head and flow rate, originates from the axial electromagnetic thrust generated internally; therefore, axial force is the fundamental indicator of electromagnetic pump performance. During the design phase of the electromagnetic pump, engineers calculate the expected axial force at specific voltages and frequencies using theoretical formulas and numerical simulations. To verify the accuracy of the calculations and provide clear diagnostic basis and direction for electromagnetic pump design optimization, axial force testing is usually required.

[0025] Because electromagnetic pumps transport liquid metal, high-temperature test benches are often required, leading to high testing costs and long testing cycles. However, the fluidity of liquid metal is a requirement of the transport scenario, not a necessary condition for thrust testing. This solution creatively recognizes that as long as a solid, non-magnetic, and highly conductive structure is placed in the same magnetic field, it will also experience axial force due to induced eddy currents. This force is of the same origin as the force driving the liquid metal. Therefore, measuring this force acting on the solid test tube can directly and accurately reflect the magnitude of the thrust generated by the core electromagnetic components of the electromagnetic pump.

[0026] like Figure 1 and Figure 2 As shown, an electromagnetic pump performance testing device includes a support 2 for mounting an electromagnetic pump 1. During installation, the upper surface of the support 2 is first adjusted to a horizontal position, and then the lower surface is welded and fixed to the ground. The electromagnetic pump 1 to be measured is mounted on the support 2 with bolts. Adjusting shims are provided at the bottom of the bolts to adjust the horizontal position of the electromagnetic pump 1. Support frames 4 are provided at both ends of the electromagnetic pump 1 to support a test tube 3. After the test tube 3, made of non-magnetic conductive material, is inserted into the annular flow channel 11 of the electromagnetic pump 1, its horizontal position is adjusted by the support frames 4 at both ends to ensure that the test tube 3 and the annular flow channel 11 are coaxial. A safety baffle 8 is provided on the outer side of one end of the support frame 4 to prevent the test tube 3 from flying out due to excessive axial force during testing, causing a safety hazard. A sensor support 6 is provided on the outer side of the other end of the support frame 4 to fix a force sensor 5. Each support frame has a triangular support reinforcement on one side to prevent deformation of the support frame under external force, ensuring that each support frame remains perpendicular to the support 2, thus maintaining the coaxial arrangement of the electromagnetic pump 1, the test tube 3, and the force sensor 5.

[0027] like Figure 1As shown, the electromagnetic pump 1 is connected to a frequency converter via a cable, and is powered by the frequency converter. The frequency converter is equipped with a multi-function meter that can display parameters such as frequency, voltage, current, and power in real time. By adjusting the output voltage and frequency of the frequency converter, the axial force of the force sensor 5 is collected at different output voltages and frequencies to obtain the relationship curves between different frequencies and axial forces, and between different voltages and axial forces. Furthermore, by swapping the phase sequence of any two phases of the electromagnetic pump, the reverse axial force can be obtained.

[0028] During the experiment, electromagnetic pump 1 generates a large amount of eddy current losses that accumulate on the winding coil and test tube 3. To prevent the test tube 3 from overheating and being damaged, a temperature sensor 9 is installed on the surface of the test tube 3. This sensor monitors the temperature of the test tube 3 in real time, preventing it from melting due to excessive temperature during testing, and obtaining different resistivity parameters of the test tube 3 under temperature changes. Simultaneously, multiple temperature sensors 9 are also installed on the electromagnetic pump winding coil to monitor the coil temperature and prevent the coil from operating beyond its heat resistance temperature, which could lead to damage. The temperature sensors 9 are connected to a secondary instrument in the field for real-time display of test data and to facilitate the acquisition of resistivity parameters of the test material at different temperatures.

[0029] Figure 3 for Figure 2 A magnified view of a portion, such as Figure 2 and Figure 3 As shown, support frames 4 are provided at both ends of the test tube 3. A low-friction coefficient polytetrafluoroethylene (PTFE) bushing is provided between the support frame 4 and the test tube 3. This significantly reduces the resistance that the test tube 3 needs to overcome during initial and continuous movement, allowing most of the axial electromagnetic force to be transmitted to the force sensor 5 without loss, thus ensuring the accuracy and reliability of the axial force measurement data. The PTFE bushing provides a smooth axial sliding interface for the test tube 3, allowing it to slide freely axially when thermally expanded due to induced eddy currents, thereby releasing thermal stress and preventing the test tube 3 from jamming or deforming under pressure. Simultaneously, the relatively soft PTFE material, as a bushing, protects the surface finish of the test tube 3, preventing surface damage after repeated assembly, disassembly, and testing from affecting its electrical performance or mechanical precision, and extending the service life of the test tube 3.

[0030] The support frame 4 is bolted to the support 2, with an adjusting shim 42 between them, allowing for precise adjustment of the height of the support frame 4. Since the axis of the annular flow channel 11 of the electromagnetic pump 1 is fixed after manufacturing and installation, and although the initially installed test tube 3 is roughly positioned by the support frame 4, its central axis may still have slight height and angular deviations in three-dimensional space. These deviations are sufficient to disrupt the ideal coaxial state. By using the adjusting shim 42 at the bottom of the support frame 4, the height and tilt angle of the test tube 3 at the top of the support frame 4 in the vertical and horizontal directions can be adjusted with extreme precision, achieving the purpose of adapting to tests of test tubes 3 of different specifications. Simultaneously, since tolerances exist in any machining and assembly, the electromagnetic pump 1, support 2, support frame 4, and test tube 3 themselves all have dimensional deviations. The adjusting shim 42 can act as a universal error compensator, absorbing and offsetting the accumulated dimensional errors of these components.

[0031] The PTFE low-friction bushing 41 and the adjusting shim 42 at the bottom of the support frame together form a coordinated precision positioning and force transmission system. This low-friction, high-coaxiality structure ensures the accuracy of axial force testing, while also improving the flexibility and versatility of the device by adjusting it to fit different specifications of test tubes 3.

[0032] The tail end of the test tube 3 is fixedly connected to the force sensor 5 via an adjusting bolt 7. The adjusting bolt 7 has a T-shaped cross-section and a bolt hole on its shoulder, which allows for tight fixing to the tail end of the test tube 3. The tail end is an externally threaded screw that passes through the gap in the sensor support 6 and is precisely fitted to the force sensor 5 via the thread. The force sensor 5 is then fixed to the sensor support 6 by bolts.

[0033] The adjusting bolt 7 acts as an axial position calibrator, ensuring precise force transmission while also serving as a zero-point adjustment. Through its precise threaded drive, it quickly and accurately unifies test pieces with different dimensional tolerances to a fixed measurement reference position, ensuring that all axial force-displacement test data originate from the same zero point. This fundamentally guarantees the consistency and accuracy of test results, significantly improving experimental efficiency. Because different test pieces have inherent dimensional tolerances during manufacturing, direct installation would result in different initial positions for each piece. Without this adjusting bolt 7, the reference point of the displacement measurement system would drift after each replacement of the test tube 3, making direct comparison of measurement data impossible and introducing systematic errors.

[0034] After mechanical assembly, the system is unloaded and the electromagnetic pump 1 is not powered, resulting in zero axial electromagnetic force. The entire mechanical system is in a stable, static equilibrium position, free from external forces, which is the physical "zero-point reference." Under this mechanical reference state, although the system is not subject to external forces, the readings of the connected secondary instruments typically do not show zero due to the initial offset of the sensor itself, the weight of the connecting parts, and the slight installation prestress. At this point, the operator simply needs to press the "zeroing" function key on the secondary instrument. The microprocessor inside the instrument will collect the current output voltage value of the sensor, lock it, and record it as the "zero-point reference value" for subsequent measurements. This structure allows for zeroing with a single button press without any external tools and automatically deducts all static initial loads present after installation, including bolt preload and the weight component of the test tube 3, ensuring the purity of the measurement results.

[0035] The rigid connection structure established by the adjusting bolt 7 provides a stable and reliable physical reference state for the zeroing function of the force sensor 5. Even when replacing test tubes 3 with different thicknesses or sizes, the bolt's fine zeroing capability can adapt to the initial state of different test tubes 3, avoiding the complex process of recalibrating the sensor after replacing the test tube in traditional designs. Integrating the transmission and zeroing functions into a single part eliminates multiple connection interfaces, gaskets, or additional zeroing mechanisms that may exist in traditional designs, reducing the total number of parts, lowering manufacturing costs and assembly complexity, avoiding the cumulative errors and assembly stress caused by using multiple independent parts, and improving the consistency and repeatability of test results between different devices.

[0036] like Figure 4 As shown, the test tube 3 is a thin-walled circular tubular component with an outer diameter that matches the inner diameter of the pump channel of the target electromagnetic pump. It is arranged horizontally along the axis and coaxially inserted into the annular flow channel 11 of the electromagnetic pump 1. The test tube 3 is made of a non-magnetic, highly conductive material, which is one of the two indispensable and interrelated basic prerequisites for accurately simulating the force on liquid metal and precisely measuring the axial force.

[0037] Magnetic materials can disrupt the traveling wave magnetic field in an electromagnetic pump, altering its distribution and completely destroying its shape. This prevents the traveling wave from advancing properly, resulting in a magnetic field distribution within the annular flow channel 11 that is entirely different from the design conditions, extremely uneven, and unpredictable. Consequently, any data measured under this distorted magnetic field cannot accurately reflect the performance of the electromagnetic pump when driving actual liquid metal, rendering the test ineffective and worthless. Furthermore, the core concept of this invention is to replace liquid metal with a solid conductor; therefore, the test tube must be a good conductor with excellent processing properties, easily molded into the desired shape, such as aluminum or copper. Only in this way can it induce strong eddy currents when placed in the traveling wave magnetic field of the electromagnetic pump. Since aluminum is more advantageous than copper in terms of cost and weight reduction, it is the preferred material for the test tube.

[0038] The core component of a three-phase cylindrical induction electromagnetic pump, the stator outside the pump groove, typically consists of three independent winding coils. These three coils are symmetrically distributed at 120 degrees in space. To fix these three coils and form a complete magnetic circuit, the pump body shell usually has three corresponding connecting blocks 12, which are evenly distributed circumferentially. To avoid interference between the wall of the test tube 3 and the connecting blocks 12, which could affect the movement of the test tube 3 and lead to inaccurate test data, three axially open slots 31 are precisely machined in the tube body of the test tube 3. The axial width of these slots is slightly larger than the size of the inherent connecting blocks 12 on the electromagnetic pump 1, leaving a certain gap between them to ensure that the tube wall of the test tube 3 can effectively avoid the connecting blocks 12 and slide after insertion, achieving interference-free installation.

[0039] By creating three evenly distributed slots, the stiffness reduction is effectively distributed uniformly across the entire circumference. This ensures that the stiffness and deformation of the test tube 3 remain axisymmetric under stress, avoiding measurement deviations or vibrations caused by uneven stiffness. The width of the slots only needs to be slightly larger than the size of the connecting block 12, resulting in a smaller total area of ​​the three narrow slots. This means that the effective conductive area on the test tube 3 that can be cut by the magnetic field and generate induced eddy currents is larger, resulting in an axial force closer to the theoretical value, a stronger measurement signal, and more accurate results.

[0040] The test tubes can be quickly replaced with different thicknesses to simulate different conductive cross-sectional areas of liquid metal; different opening groove designs can be adapted to different annular flow channel structures, efficiently completing a variety of different variable tests, thereby quickly screening the optimal parameters, which can significantly shorten the R&D cycle and reduce the overall testing cost.

Claims

1. A performance testing device for an electromagnetic pump, characterized in that: Includes a support (2) for mounting the electromagnetic pump (1), and a test tube (3) made of a non-magnetic, highly conductive material inserted into the annular flow channel (11) of the electromagnetic pump (1). The test tube (3) is coaxially arranged with the annular flow channel (11) through the support frames (4) at both ends; The end of the test tube (3) is fixedly connected to the force sensor (5) by an adjusting bolt (7).

2. The electromagnetic pump performance testing device according to claim 1, characterized in that: The test tube (3) is provided with three circumferentially open grooves (31) to accommodate the connecting block (12) in the annular flow channel (11).

3. The electromagnetic pump performance testing device according to claim 1, characterized in that: A bushing (41) with a low coefficient of friction is provided between the test tube (3) and the support frame (4); the support frame (4) is fixed to the support (2) by bolts, and an adjusting shim (42) is provided between the support frame (4) and the support (2).

4. The electromagnetic pump performance testing device according to claim 1, characterized in that: The cross-section of the adjusting bolt (7) is T-shaped, with bolt holes on the shoulder, and is fixedly connected to the test tube (3); the tail is an external threaded screw, which is precisely fitted with the force sensor (5) through threads.

5. The electromagnetic pump performance testing device according to claim 1 or 4, characterized in that: The force sensor (5) is fixed to the sensor support (6) by bolts; there is a gap between the adjusting bolt (7) and the sensor support (6).

6. The electromagnetic pump performance testing device according to claim 5, characterized in that: The force sensor (5) has a bidirectional measurement function of tension and compression and is connected to a secondary instrument.

7. The electromagnetic pump performance testing device according to claim 1, characterized in that: The test tube (3) is provided with a temperature sensor (9) on its surface; the electromagnetic pump (1) winding coil is provided with multiple temperature sensors (9); the temperature sensor (9) is connected to a secondary instrument.

8. The electromagnetic pump performance testing device according to claim 1, characterized in that: The upper surface of the support (2) is horizontal, and the lower surface is welded and fixed to the ground; a safety baffle (8) is provided on the side of the support (2) away from the force sensor (5).

9. An electromagnetic pump performance testing device according to claim 1 or 7, characterized in that: The electromagnetic pump (1) is connected to the frequency converter via a cable, and the frequency converter is equipped with a multi-function meter.

10. An electromagnetic pump performance testing device according to claim 1, 2, or 3, characterized in that: The test tube (3) is an aluminum alloy tube.

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