Test device for dynamic characteristic loading of electromagnets

Abstract

The embodiment of the present application provides a test device for dynamic characteristic loading of an electromagnet. The test device comprises a shell, a connecting piece, a support frame, a cylinder, a stroke sensor, a magnetic conducting rod and a variable volume air cylinder. The shell has a first plate body and a second plate body oppositely arranged along a preset direction, and has a mounting cavity between the first plate body and the second plate body. The second plate body is used for placing a measured electromagnet. The support frame is arranged in the mounting cavity. One end of the connecting piece is connected with the support frame. The cylinder body of the cylinder is arranged on the support frame. The piston part of the cylinder is oppositely arranged with the measured electromagnet. The variable volume air cylinder is communicated with the cylinder through an air pipe. The magnetic conducting rod and the end of the piston part opposite to the cylinder body of the cylinder are detachably abutted. The magnetic conducting rod can be coupled with the measured electromagnet. Therefore, the test device according to the embodiment of the present application has the advantage of high accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnet performance research and application, and in particular to a testing device for loading dynamic characteristics of an electromagnet. Background Art

[0002] An electromagnet is an electrical device that, when energized, generates attraction on ferromagnetic materials, converting electromagnetic energy into mechanical energy. The electromagnetic attraction and mechanical reaction force of an electromagnet are a pair of contradictory forces necessary for its proper operation; neither is indispensable. The dynamic characteristics of an electromagnet primarily refer to its time-displacement characteristic curve, which changes with load size. A high-performance electromagnet must have a well-matched attraction and reaction curves. This matching relationship determines the electromagnet's efficiency and reliability. During the movement of an electromagnet, the coil current varies, and the dynamic attraction curve is correlated with the reaction force, making it difficult to measure.

[0003] In the related art, the invention, entitled "Testing Device for Dynamic Suction Characteristics of Electromagnets and Testing Method Based on the Device," is published under the authorization publication number CN112284591B. The device includes a pressure sensor, a bracket, and a spring for measurement. The magnitude of the elastic load is related to displacement, and the related testing device can only adjust the initial force of the elastic load by adjusting the spring compression. However, current methods cannot change the stiffness of the elastic load, resulting in significant deviations between the test results and actual operating conditions. Summary of the Invention

[0004] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0005] The present invention aims to solve, at least to some extent, one of the technical problems in the related art. To this end, an embodiment of the present invention provides a test device for dynamic characteristic loading of an electromagnet. The test device has the advantage of high test data accuracy.

[0006] The test device for dynamic characteristic loading of an electromagnet according to an embodiment of the present invention includes a housing, a connector, a support frame, a cylinder, a stroke sensor, a magnetic rod, and a variable volume air cylinder.

[0007] The housing includes a first plate and a second plate that are arranged opposite to each other along a preset direction. The first plate and the second plate are spaced apart along the preset direction. A mounting cavity is defined between the first plate and the second plate, and the second plate is used to place the electromagnet to be measured. The connecting member is movably connected to the first plate along the preset direction. The connecting member extends in the preset direction toward the second plate. The support frame is disposed in the mounting cavity. The cylinder body of the cylinder is disposed on the support frame. The piston portion of the cylinder extends in the preset direction toward the second plate. The piston portion of the cylinder is disposed opposite to the electromagnet to be measured. The stroke sensor is used to measure the stroke of the piston portion. The variable volume air cylinder is connected to the cylinder via an air pipe to adjust the initial air volume of the cylinder. The magnetic rod and the piston portion are detachably abutted at one end opposite to the cylinder body of the cylinder. The magnetic rod can be coupled to the electromagnet to be measured so that when the electromagnet to be measured is energized, a thrust is generated on the magnetic rod. The magnetic rod can move in the preset direction to abut against the sensor.

[0008] The test device for dynamic characteristics loading of electromagnets according to the embodiment of the present invention is configured to connect a variable volume air cylinder with an air cylinder through an air pipe to form an elastic buffer. The elastic buffer has a stiffness of K = ΔF / ΔX, where ΔX is the change in distance, ΔF is the change in force, and ΔF = P·S, where S is the cross-sectional area of ​​the piston. Thus, K = P·S / ΔX. According to the ideal gas state equation, P 缸 V = P 缸 '(VS·ΔX), and then we get, (P 缸 '-P 缸 )·(V-S·ΔX)=P 缸 ·S·ΔX;ΔP= P 缸 ·S·ΔX / (VS·ΔX); furthermore, we know that K= P 缸 ·S 2 / V; Since S·ΔX is much smaller than V, K= P 缸 ·S 2 / V. It can be seen that through P 缸 The stiffness of the test device can be varied with V. Specifically, the test device for dynamic electromagnet loading according to the present invention replaces the spring used in related art by connecting a variable-volume air cylinder and an air cylinder via an air pipe. As the magnetic rod moves, its stiffness can be varied accordingly. This provides the advantage of high accuracy.

[0009] Therefore, the testing device for dynamic characteristic loading of an electromagnet according to the embodiment of the present invention has the advantage of high testing accuracy.

[0010] In some embodiments, the support frame includes a support frame and a center beam, the support frame and the center beam are both arranged in the installation cavity, the center beam is arranged on the support frame, the connecting member is connected to the support frame, and the cylinder body of the cylinder is arranged on the center beam.

[0011] In some embodiments, the support frame also includes a guide rod, a guide hole is provided on the first plate, one end of the guide rod is connected to the support frame, and the other end of the guide rod extends along a preset direction, and the guide rod is movably inserted into the guide hole.

[0012] In some embodiments, the test device for dynamic characteristic loading of electromagnets also includes a damping member and a force sensor, a portion of the damping member is arranged on the piston portion, and another portion of the damping member is connected to the support frame, and the force sensor is used to monitor the force acting on the damping member.

[0013] In some embodiments, the test device for dynamic characteristic loading of an electromagnet further includes a mass block, and the mass block is disposed on the piston portion of the cylinder.

[0014] In some embodiments, the piston portion of the cylinder includes a cylinder rod body and a movable beam, the movable beam is arranged on the cylinder rod body, the stroke sensor is arranged on the middle beam, the damping member includes a main body and a damping member, the main body of the damping member is arranged on the support frame, a part of the damping member is damped and fitted in the main body, and the part of the damping member is movable along the preset direction, another part of the damping member is connected to the movable beam, and the force sensor is arranged on the damping member.

[0015] In some embodiments, the piston portion of the cylinder includes a cylinder rod body and a movable beam, the movable beam is arranged on the cylinder rod body, the stroke sensor is arranged on the center beam, and the mass block is arranged on the movable beam.

[0016] In some embodiments, there are at least two damping members, and the at least two damping members are correspondingly disposed in areas of the movable beam located on both sides of the piston portion.

[0017] In some embodiments, there are at least two mass blocks, and the at least two mass blocks are correspondingly arranged in areas of the movable beam on both sides of the piston part.

[0018] In some embodiments, the damping member also includes a throttle valve, a portion of the damping portion is arranged in the main body so as to separate the main body into a first damping chamber and a second damping chamber, the first damping chambers of at least two of the damping members are connected to each other through a pipeline and are both connected to the inlet of the throttle valve, and the second damping chamber of each of the damping members is connected to the outlet of the throttle valve.

[0019] In some embodiments, the test device for dynamic characteristic loading of electromagnets also includes an adjustment control unit, which includes a solenoid valve and a proportional valve. A limiting portion is provided on the support frame, and the piston portion has a matching portion. One end of the piston portion passes through the support frame, and the piston portion has a matching portion and the limiting portion so that the piston portion and the support frame have a preset force. The proportional valve can be connected to an air source, and the air inlet of the proportional valve is connected to the variable volume air cylinder and the cylinder through an inflation pipe. The solenoid valve is arranged on the inflation pipe to adjust the preset force.

[0020] In some embodiments, the variable volume air cylinder includes a valve body, an air cylinder piston and an adjusting bolt, the adjusting bolt is threadedly engaged with the valve body, the air cylinder piston is connected to the adjusting bolt, and the valve cavity of the valve body is connected to the air pipe and the cylinder.

[0021] In some embodiments, the connecting member includes an electric cylinder body and an electric cylinder rod, the electric cylinder rod is movably connected to the electric cylinder body along the preset direction, the electric cylinder rod extends along the preset direction toward the direction close to the second plate body, and the electric cylinder rod is connected to the support frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of a testing device for dynamic characteristic loading of an electromagnet according to an embodiment of the present invention.

[0023] Figure 2 It is a cross-sectional view of a testing device for dynamic characteristic loading of an electromagnet according to an embodiment of the present invention.

[0024] Figure 3 yes Figure 2 Enlarged view at point A.

[0025] Figure 4 It is a cross-sectional view of a variable volume air cylinder according to an embodiment of the present invention.

[0026] Figure 5 It is a cross-sectional view of a testing device for dynamic characteristic loading of an electromagnet according to another embodiment of the present invention.

[0027] Figure 6 It is a cross-sectional view of a testing device for dynamic characteristic loading of an electromagnet according to another embodiment of the present invention.

[0028] Figure 7 It is a schematic diagram of the cylinder, stroke sensor, variable volume air cylinder and adjustment control unit according to an embodiment of the present invention.

[0029] Figure 8 4 is a schematic diagram of a damping member according to an embodiment of the present invention.

[0030] Reference numerals:

[0031] Testing device 100; electromagnet under test 200;

[0032] Housing 1; first plate 11; guide hole 111; second plate 12; mounting cavity 13;

[0033] Connecting part 2; electric cylinder body 21; electric cylinder rod 22;

[0034] Support frame 3; support frame 31; middle beam 32; guide rod 33;

[0035] Cylinder 4; cylinder body 41; cylinder piston portion 42; mating portion 421; cylinder rod body 421; movable beam 422;

[0036] Variable volume air cylinder 5; valve body 51; air cylinder piston 52; adjusting bolt 53;

[0037] Magnetic rod 6;

[0038] Damping member 7; main body 71; first damping chamber 711; second damping chamber 712; damping portion 72; throttle valve 73;

[0039] Mass 8;

[0040] Travel sensor 91; force sensor 92;

[0041] Control unit 10; solenoid valve 101; proportional valve 102. DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0043] Reference below Figures 1-8 A testing device 100 for dynamic characteristic loading of an electromagnet according to an embodiment of the present invention is described.

[0044] The testing device 100 for dynamic characteristic loading of an electromagnet according to an embodiment of the present invention includes a housing 1 , a connector 2 , a support frame 3 , a cylinder 4 , a stroke sensor 91 , a magnetic rod 6 and a variable volume air cylinder 5 .

[0045] The housing 1 has a predetermined direction (eg Figure 1 The first plate body 11 and the second plate body 12 are arranged relative to each other (in the up and down direction shown in the figure), and the first plate body 11 and the second plate body 12 are arranged spaced apart along a preset direction. A mounting cavity 13 is provided between the first plate body 11 and the second plate body 12, and the second plate body 12 is used to place the electromagnet 200 to be tested; the connecting member 2 is movably connected to the first plate body 11 along a preset direction, and the connecting member 2 extends in a preset direction toward the direction close to the second plate body 12, the support frame 3 is arranged in the mounting cavity 13, and the cylinder body 41 of the cylinder is arranged on the support frame 3. The piston portion 42 extends in a preset direction toward the direction close to the second plate body 12, the piston portion 42 of the cylinder is arranged opposite to the electromagnet 200 to be tested, the stroke sensor 91 is used to measure the stroke of the piston portion, and the variable volume air cylinder 5 is connected to the cylinder 4 through the air pipe; the magnetic rod 6 and the piston portion are detachably abutted at the end opposite to the cylinder body 41 of the cylinder, the magnetic rod 6 can be coupled with the electromagnet 200 to be tested so that when the electromagnet 200 to be tested is energized to generate thrust on the magnetic rod 6, and the magnetic rod 6 can move in a preset direction to abut against the sensor.

[0046] The test device 100 for dynamic characteristics loading of electromagnets according to the embodiment of the present invention is configured to connect the variable volume air cylinder 5 and the air cylinder 4 through an air pipe to form an elastic buffer. The elastic buffer has a stiffness K = ΔF / ΔX, where ΔX is the change in distance, ΔF is the change in force, and ΔF = P·S, where S is the cross-sectional area of ​​the piston. Thus, K = P·S / ΔX. According to the ideal gas state equation, P 缸 V = P 缸 '(VS·ΔX), and then we get, (P 缸 '-P 缸 )·(V-S·ΔX)=P 缸 ·S·ΔX;ΔP= P 缸 ·S·ΔX / (VS·ΔX); furthermore, we know that K= P 缸 ·S 2 / V; Since S·ΔX is much smaller than V, K= P 缸 ·S 2 / V. It can be seen that through P 缸 The stiffness of the test device 100 can be varied with V. In other words, the test device 100 for dynamic electromagnet loading according to the present invention replaces the spring used in related art by connecting the variable-volume air cylinder 5 and the air cylinder 4 via an air pipe. The stiffness of the magnetic rod 6 can be varied simultaneously during its movement, resulting in a high degree of accuracy.

[0047] Therefore, the testing device 100 for dynamic characteristic loading of an electromagnet according to the embodiment of the present invention has the advantage of high testing accuracy.

[0048] Specifically, the housing 1 includes a base and a U-shaped frame, and the U-shaped frame is upside down on the base.

[0049] Furthermore, the U-shaped frame has a flange portion, which is detachably connected to the base, the second plate 12 is formed on the base, and the first plate 11 is formed on the U-shaped frame. For example, the flange portion and the base are fixed by screws.

[0050] Specifically, the connecting member 2 is connected to the first plate body 11 , and the connecting member 2 passes through the first plate body 11 along a preset direction and extends toward a direction close to the second plate body 12 .

[0051] During the test, the electromagnet 200 to be tested is placed directly on the second plate 12, and a portion of the magnetic rod 6 is passed through the electromagnet 200 to be tested. When the power supply of the electromagnet 200 to be tested is turned on, the electromagnet 200 to be tested will generate a repulsive force on the magnetic rod 6, and the magnetic rod 6 will push the piston part 42 of the cylinder to move. The stroke sensor 91 can measure the moving stroke of the piston part 42 of the cylinder, thereby changing the volume and overall stiffness of the cylinder 4.

[0052] For ease of description, the following Figure 1 The up and down direction in the figure is the height direction of the housing 1. Figure 1 The in-and-out directions in the figure are taken as the in-and-out directions of the shell 1 .

[0053] like Figure 1 and Figure 2 As shown, the support frame 3 includes a support frame 31 and a center beam 32. The support frame 31 and the center beam 32 are both arranged in the installation cavity 13. The center beam 32 is arranged on the support frame 31. The connecting member 2 is connected to the support frame 31, and the cylinder body 41 of the cylinder is arranged on the center beam 32.

[0054] The test device 100 for dynamic characteristic loading of an electromagnet according to an embodiment of the present invention comprises a support frame 3 divided into a support frame 31 and a center beam 32, a connector 2 connected to the support frame 31, and a cylinder body 41 disposed on the center beam 32, thereby avoiding interference between the connector 2 and the cylinder body 41. This facilitates installation.

[0055] like Figure 1 and Figure 2 As shown, the support frame 3 also includes a guide rod 33, a guide hole 111 is provided on the first plate body 11, one end of the guide rod 33 is connected to the support frame 31, and the other end of the guide rod 33 extends along a preset direction. The guide rod 33 is movably arranged in the guide hole 111.

[0056] The test device 100 for dynamic characteristics loading of an electromagnet according to an embodiment of the present invention guides the guide rod 33 of the support frame 3 into the guide hole 111 of the first plate 11. As a result, the support frame 3 can only reciprocate along a predetermined direction. This improves the overall structural stability of the test device 100 and reduces the effects of external interference.

[0057] For example, Figure 1 As shown, the guide rod 33 is a cylindrical structure, the lower end of the guide rod 33 is connected to the upper end surface of the support frame 31 , and a portion of the guide rod 33 is inserted into the guide hole 111 on the first plate 11 .

[0058] like Figure 6 As shown, the test device 100 for dynamic characteristic loading of an electromagnet according to an embodiment of the present invention further includes a damping member 7 and a force sensor 92. A portion of the damping member 7 is connected to the piston portion, and another portion of the damping member 7 is connected to the support frame 3. The force sensor 92 is used to monitor the force acting on the damping member 7.

[0059] The test device 100 for loading the dynamic characteristics of an electromagnet according to the embodiment of the present invention can simulate the dynamic characteristics of the electromagnet more realistically by adding a damping load to the test device 100, thereby improving the accuracy of the electromagnet dynamic characteristics test.

[0060] Further, if Figure 1 and Figure 2 As shown, the piston portion 42 of the cylinder includes a cylinder rod body 421 and a movable beam 422, the movable beam 422 is arranged on the cylinder rod body 421, the stroke sensor 91 is arranged on the middle beam 32, the damping member 7 includes a main body 71 and a damping portion 72, the main body 71 of the damping member 7 is arranged on the support frame 3, a part of the damping portion 72 is damped and fitted in the main body 71, and a part of the damping portion 72 is movable along a preset direction, the other part of the damping portion 72 is connected to the movable beam 422, and the force sensor 92 is arranged on the damping portion 72.

[0061] The test device 100 for dynamic characteristics loading of an electromagnet according to an embodiment of the present invention comprises a damping member 7 having a main body 71 disposed on a support frame 3. A portion of a damping member 72 is fitted within the main body 71, and a portion of the damping member 72 is movable in a predetermined direction. The damping member 72 is connected to the piston portion 42 of the cylinder via the damping member 72. This allows the damping load to synergize with the elastic load to produce more realistic simulation data. Furthermore, the damping member 72 forms a damping barrier between the main body 71, providing the advantage of a simple structure.

[0062] The embodiment of the present invention is not limited thereto. For example, in other embodiments, Figure 5As shown, the test device 100 for dynamic characteristic loading of an electromagnet according to an embodiment of the present invention further includes a mass block 8 , which is disposed on the piston portion 42 of the cylinder.

[0063] The electromagnet dynamic characteristics testing device 100 of the present invention provides a resistance load by attaching a mass block 8 to the piston portion 42 of the cylinder, thereby more realistically simulating the electromagnet's dynamic characteristics. This improves the accuracy of the electromagnet dynamic characteristics test.

[0064] Furthermore, the piston portion 42 of the cylinder includes a cylinder rod body 421 and a movable beam 422. The movable beam 422 is arranged on the cylinder rod body 421, the stroke sensor 91 is arranged on the center beam 32, and the mass block 8 is arranged on the movable beam 422. Thus, the force balance of the piston portion is improved.

[0065] The embodiment of the present invention is not limited thereto. For example, in other embodiments, Figure 1 and Figure 2 As shown, the test device 100 for dynamic characteristic loading of an electromagnet according to an embodiment of the present invention further includes a mass block 8, a damping member 7 and a force sensor 92, the stroke sensor 91 is arranged on the middle beam 32, the movable beam 422 is arranged on the piston portion 42 of the cylinder, the mass block 8 is arranged on the movable beam 422, the damping member 7 includes a main body 71 and a damping portion 72, the main body 71 of the damping member 7 is arranged on the support frame 3, a part of the damping portion 72 is arranged in the main body 71, and a part of the damping portion 72 is movable along a preset direction, the other part of the damping portion 72 is connected to the movable beam 422, and the force sensor 92 is arranged on the damping portion 72.

[0066] The test device 100 for loading the dynamic characteristics of an electromagnet according to an embodiment of the present invention can have elastic load, mass load and damping load by setting the mass block 8 on the piston part 42 of the cylinder, thereby further improving the authenticity of simulating the dynamic characteristics of the electromagnet.

[0067] The force sensor 92 connected to the damper can measure the value of the resistive load; the force sensor 92 connected to the limit rod can measure the thrust of the electromagnet, that is, the combined force of the resistive load, inductive load and inertial load; the stroke sensor 91 can measure the time-displacement characteristic curve of the electromagnet push rod.

[0068] Specifically, the main body 71 is a cylindrical portion, and the outer peripheral wall of the damping portion 72 and the inner wall surface of the cylindrical portion damp sliding. The damping portion 72 is connected to the cylinder rod body 421 through the movable beam 422 to transmit the force exerted on the damping portion 72 to the piston portion 42 of the cylinder.

[0069] like Figure 1 and Figure 2 As shown, there are at least two damping members 7, which are correspondingly arranged in the areas on both sides of the piston portion of the movable beam 422. This improves the balance of the force applied to the movable beam 422, thereby improving the authenticity of the simulation data.

[0070] Specifically, there are two damping members 7 , which are symmetrically arranged on the movable beam 422 on both sides of the piston part.

[0071] like Figure 1 and Figure 2 As shown, there are at least two mass blocks 8, which are correspondingly arranged in the areas on both sides of the piston portion of the movable beam 422. Similarly, the force balance of the movable beam 422 is improved, thereby improving the authenticity of the simulation data.

[0072] like Figure 1 and Figure 2 As shown, the damping member 7 also includes a throttle valve 73, and a portion of the damping portion 72 is arranged in the main body 71 so as to separate the main body 71 into a first damping chamber 711 and a second damping chamber 712. The first damping chambers 711 of at least two damping members 7 are connected to each other through a pipeline and are both connected to the inlet of the throttle valve 73, and the second damping chamber 712 of each damping member 7 is connected to the outlet of the throttle valve 73.

[0073] In the test device 100 for dynamic loading of electromagnets according to an embodiment of the present invention, a throttle valve 73 is provided. The first damping chambers 711 of at least two damping elements 7 are connected to each other through a pipe and are both connected to the inlet of the throttle valve 73. The second damping chamber 712 of each damping element 7 is also connected to the outlet of the throttle valve 73. Specifically, the gas in the first damping chamber 711 is transferred to the second damping chamber 712. This generates a resistive load. By adjusting the opening size of the throttle valve 73, the damping coefficient of the damper can be adjusted.

[0074] In addition, the first damping chambers 711 of at least two damping members 7 are connected to each other through a pipeline, which is conducive to ensuring the consistency of loads of multiple damping members 7.

[0075] The test device 100 for loading the dynamic characteristics of an electromagnet in an embodiment of the present invention also includes an adjustment control unit 10, which includes a solenoid valve 101 and a proportional valve 102. A limiting portion is provided on the support frame 3, and the piston portion has a matching portion 421. One end of the piston portion passes through the support frame 3, and the piston portion has a matching portion 421 and a limiting portion so that the piston portion and the support frame 3 have a preset force. The proportional valve 102 can be connected to the air source, and the air inlet of the proportional valve 102 is connected to the variable volume air cylinder 5 and the cylinder 4 through the inflation pipe. The solenoid valve 101 is arranged on the inflation pipe to adjust the preset force.

[0076] The testing device 100 for dynamic loading of electromagnets according to the present invention connects the air inlet of a proportional valve 102 to both the variable-volume air cylinder 5 and the air cylinder 4 via an air pipe. A solenoid valve 101, mounted on the air pipe, adjusts the volume of the variable-volume air cylinder 5. This allows for adjusting the initial force of the elastic load. Consequently, the device is suitable for measuring the dynamic characteristics of various electromagnets, offering a wide range of applications.

[0077] Further, if Figure 1 and Figure 2 As shown, the variable volume air cylinder 5 includes a valve body 51, an air cylinder piston 52 and an adjusting bolt 53. The adjusting bolt 53 is threadedly engaged with the valve body 51. The air cylinder piston 52 is connected to the adjusting bolt 53. The valve cavity of the valve body 51 is connected to the air cylinder 4 through the air pipe.

[0078] The test device 100 for dynamic characteristics loading of an electromagnet according to an embodiment of the present invention divides a variable volume air cylinder 5 into a valve body 51, an air cylinder piston 52, and an adjustment bolt 53. By adjusting the position of the bolt, the pressure between the valve body 51 and the cylinder 4 is changed. This has the advantages of a simple structure and easy adjustment.

[0079] Specifically, the valve body 51 has a sealed cavity, and the air cylinder piston 52 can move as the adjusting bolt 53 moves, so that the upper air cylinder piston 52 separates the sealed cavity into an upper sealed cavity and a lower sealed cavity, wherein the upper sealed cavity is connected to the cylinder body 41 of the cylinder. When working, the upper sealed cavity is filled with high-pressure gas.

[0080] Before testing, the required gas volume is calculated based on the ideal gas state equation and the required elastic load stiffness. The position of adjustment bolt 53 is then adjusted based on the required volume. After adjusting variable-volume air cylinder 5, solenoid valve 101 is energized, regulating the pressure in air cylinder 4 via proportional valve 102, thereby adjusting the output force of air cylinder 4. After adjustment is complete, solenoid valve 101 is de-energized, disconnecting variable-volume air cylinder 5 and air cylinder 4 from the gas source, thereby achieving elastic load adjustment.

[0081] like Figure 1 and Figure 2 As shown, the connecting member 2 includes an electric cylinder body 21 and an electric cylinder rod 22. The electric cylinder rod 22 is movably connected to the electric cylinder body 21 along a preset direction. The electric cylinder rod 22 extends along the preset direction toward the direction close to the second plate body 12. The electric cylinder rod 22 is connected to the support frame 3.

[0082] The test device 100 for dynamic characteristics loading of an electromagnet according to an embodiment of the present invention comprises a connecting member 2 divided into an electric cylinder body 21 and an electric cylinder rod 22. The electric cylinder rod 22 is movably connected to the electric cylinder body 21 along a predetermined direction. During testing, the electric cylinder rod 22 can be used to adjust the distance between the support frame 3 and the electromagnet 200 under test. This facilitates the installation and removal of the magnetic rod 6.

[0083] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0084] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0085] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0086] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0087] In the present invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification, as well as features of different embodiments or examples, unless they are mutually inconsistent.

[0088] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A test device for dynamic characteristic loading of electromagnets, characterized in that: include: A housing and a connecting member, wherein the housing has a first plate and a second plate arranged opposite to each other in a preset direction, a mounting cavity is defined between the first plate and the second plate, the second plate is used to place the electromagnet to be tested, and the connecting member is provided on the first plate; A support frame, the support frame is arranged in the installation cavity, and one end of the connecting member is connected to the support frame; A cylinder, a stroke sensor, and a variable volume air cylinder, wherein the cylinder body of the cylinder is disposed on the support frame, the piston portion of the cylinder extends along the preset direction toward the second plate body, the piston portion of the cylinder is disposed opposite to the electromagnet to be measured, the stroke sensor is used to measure the stroke of the piston portion, and the variable volume air cylinder is connected to the cylinder via an air pipe to form an elastic buffer; a magnetic rod, wherein the magnetic rod and the piston portion are detachably abutted against one end opposite to the cylinder body of the cylinder, and the magnetic rod is capable of being coupled to the electromagnet under test so as to generate a thrust P on the magnetic rod when the electromagnet under test is energized; The variable volume air cylinder includes a valve body, an air cylinder piston and an adjusting bolt. The adjusting bolt is threadedly engaged with the valve body. The air cylinder piston is connected to the adjusting bolt. The valve cavity of the valve body is connected to the cylinder through an air pipe. The pressure between the valve body and the cylinder is changed by adjusting the position of the bolt.

2. The test device for dynamic characteristic loading of electromagnet according to claim 1, characterized in that: The support frame includes a support frame and a center beam, both of which are arranged in the installation cavity, the center beam is arranged on the support frame, the connecting member is connected to the support frame, and the cylinder body of the cylinder is arranged on the center beam.

3. The test device for dynamic characteristic loading of electromagnet according to claim 2, characterized in that: The support frame also includes a guide rod, a guide hole is provided on the first plate, one end of the guide rod is connected to the support frame, the other end of the guide rod extends along a preset direction, and the guide rod is movably inserted into the guide hole.

4. The test device for dynamic characteristic loading of electromagnet according to claim 2, characterized in that: It also includes a damping member and a force sensor, wherein a portion of the damping member is disposed on the piston portion, and another portion of the damping member is connected to the support frame, and the force sensor is used to monitor the force applied to the damping member; The invention also includes a mass block, which is arranged on the piston portion of the cylinder.

5. The test device for dynamic characteristic loading of electromagnet according to claim 4, characterized in that: The piston portion of the cylinder includes a cylinder rod body and a movable beam, the movable beam is arranged on the cylinder rod body, and the stroke sensor is arranged on the center beam; The damping member includes a main body and a damping portion, the main body of the damping member is disposed on the support frame, a portion of the damping portion is dampingly fitted within the main body, and the portion of the damping portion is movable along the preset direction, another portion of the damping portion is connected to the movable beam, and the force sensor is disposed on the damping portion; The mass block is arranged on the movable beam.

6. The test device for dynamic characteristic loading of electromagnet according to claim 5, characterized in that: There are at least two damping members, and the at least two damping members are correspondingly arranged in areas of the movable beam located on both sides of the piston part; There are at least two mass blocks, and the at least two mass blocks are correspondingly arranged in areas of the movable beam located on both sides of the piston part.

7. The test device for dynamic characteristic loading of electromagnet according to claim 5, characterized in that: The damping member also includes a throttle valve, a portion of the damping portion is arranged in the main body so as to separate the main body into a first damping chamber and a second damping chamber, the first damping chambers of at least two of the damping members are connected to each other through a pipeline and are both connected to the inlet of the throttle valve, and the second damping chamber of each of the damping members is connected to the outlet of the throttle valve.

8. The test device for dynamic characteristic loading of electromagnets according to any one of claims 1 to 7, characterized in that: It also includes an adjustment control unit, which includes a solenoid valve and a proportional valve. A limiting portion is provided on the support frame, and the piston portion has a matching portion. One end of the piston portion passes through the support frame, and the piston portion has a matching portion and the limiting portion so that the piston portion and the support frame have a preset force. The proportional valve can be connected to the air source, and the air inlet of the proportional valve is connected to the variable volume air cylinder and the cylinder through an inflation pipe. The solenoid valve is arranged on the inflation pipe to adjust the preset force.

9. The test device for dynamic characteristic loading of electromagnets according to any one of claims 1 to 7, characterized in that: The connecting member includes an electric cylinder body and an electric cylinder rod. The electric cylinder rod is movably connected to the electric cylinder body along the preset direction. The electric cylinder rod extends along the preset direction toward the second plate body, and the electric cylinder rod is connected to the support frame.

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