Hollow electromagnetic coil performance testing device and method

Abstract

The invention belongs to the technical field of electromagnet application and testing, and particularly relates to a hollow electromagnetic coil performance testing device and method. The technical problem that an existing testing device cannot test the relative relation between electromagnetic force and displacement of an electromagnetic coil, the working voltage, the dynamic change of current and the like is solved. Comprising a base, a supporting ring, a supporting seat, a hollow static iron core, a hollow armature, a steel rope assembly, a loading platform, a bracket, a direct-current power supply, an ampere meter and a voltmeter, the hollow columnar boss on the base can provide an axial guide rail for the hollow armature; the inner diameter of a central through hole of the hollow armature is larger than the outer diameter of the hollow columnar boss of the base, the outer diameter of the hollow armature is smaller than the inner diameter of the hollow boss of the supporting base, and the hollow armature can freely shuttle between the hollow columnar boss of the base and the hollow columnar boss of the supporting base. The hollow columnar boss of the loading platform can downwards pass through the through hole of the hollow static iron core and is arranged outside the hollow columnar boss of the base in a sleeving mode, and the plane end of the loading platform faces upwards and is used for loading a certain object weight.

Description

Technical Field

[0001] The invention belongs to the technical field of electromagnet application and testing, and specifically relates to a hollow electromagnetic coil performance testing device and method. Background Art

[0002] The working principle of electromagnet is the magnetic effect of electric current. Its structure consists of an electromagnetic coil, a static iron core inserted in the center of the coil, and a movable armature. When the coil is energized, the static iron core and the movable armature are magnetized and become two magnets with opposite polarities. Electromagnetic attraction is generated between them. When the electromagnetic attraction is greater than the resistance, the two are attracted. Electromagnet is a device that generates electromagnetism when energized. It is widely used in mechanical assembly, train braking, electromagnetic clutch, electromagnetic valve, electromagnetic door lock and other fields. When electromagnets are used in special occasions with harsh environmental conditions, precise control and high reliability requirements, it is necessary to precisely test the electromagnetic force, stroke, current, voltage and other parameters.

[0003] In some special applications, due to the overall structural requirements, the center of the electromagnetic coil cannot be fully inserted into the static iron core. The static iron core needs to be designed as a hollow structure, and the movable armature is a special-shaped hollow structure. The performance data of the electromagnetic coil is an important parameter in the design of the electromagnet. When measuring the performance data of the electromagnetic coil, the main test is the relative relationship data between the electromagnetic force and the displacement of the movable armature, the working voltage, the dynamic change of the current, the appearance change of the static iron core, etc. However, the existing test device cannot complete the test of the relative relationship between the electromagnetic force, displacement, voltage, current, and static iron core changes. Summary of the invention

[0004] The present invention provides a hollow electromagnetic coil performance testing device and method to solve the technical problem that the existing testing device cannot complete the tests of the relative relationship between the electromagnetic force and displacement of the electromagnetic coil, the working voltage, the dynamic change of the current, etc.

[0005] The present invention is implemented by adopting the following technical scheme: a hollow electromagnetic coil performance testing device, including a base, a support ring, a support seat, a hollow static iron core, a hollow armature, a steel rope assembly, a load-bearing platform, a bracket, a DC power supply, and an ammeter and a voltmeter; the base is provided with a central through hole, and a hollow cylindrical boss with the same diameter as the central through hole is axially arranged on the upper surface, a first annular groove is arranged near the edge of the upper surface, and a plurality of long through holes are arranged on the base around the hollow cylindrical boss; the support ring is an open ring; the support seat includes a chassis with a central through hole, a second annular groove is arranged near the edge of the lower surface of the chassis, a hollow cylindrical boss with the same diameter as the central through hole is axially arranged on the upper surface of the chassis, the lower end face of the support ring can be embedded in the first annular groove of the base, and the upper The end face can be embedded in the second annular groove of the support seat, which is used to connect the base and the support seat; the hollow static iron core is provided with a central through hole, one end of the hollow static iron core is a plane, and the other end is axially provided with a hollow cylindrical boss that is equal to the diameter of the central through hole; the center of the hollow armature is a through hole, and the lower end face is evenly provided with a plurality of threaded holes around the through hole; the steel rope assembly includes a steel rope, a stainless steel lifting eye screw connected to one end of the steel rope, and a stainless steel hook connected to the other end of the steel rope; one end of the load-bearing platform is a plane, and the other end is provided with a hollow cylindrical boss; the bracket includes a support panel with a central hole and a leg surrounding the support panel and bearing the support surface; the DC power supply is used to provide power for the electromagnetic coil, and the ammeter and voltmeter are used to monitor the working voltage and working current of the electromagnetic coil in real time; The base, support ring, support seat, load-bearing platform and bracket are made of non-magnetic steel materials, and the hollow static iron core and hollow armature are made of carbon steel materials; the hollow cylindrical boss on the base can provide an axial guide track for the hollow armature; the outer diameter of the hollow cylindrical boss of the support seat is determined according to the inner diameter of the electromagnetic coil skeleton, and the outer diameter of the support seat chassis is determined according to the outer diameter of the electromagnetic coil skeleton, ensuring that the electromagnetic coil passes through the hollow cylindrical boss of the support seat and can be placed flat on the chassis of the support seat; the outer diameter of the hollow cylindrical boss of the hollow static iron core is smaller than the inner diameter of the hollow cylindrical boss of the support seat, and the hollow cylindrical boss of the hollow static iron core faces downward and can be inserted into the hollow cylindrical boss of the support seat, with the flat end placed flat on the end face of the hollow cylindrical boss of the support seat; The inner diameter of the central through hole of the hollow armature is larger than the outer diameter of the hollow cylindrical boss of the base, and the outer diameter of the hollow armature is smaller than the inner diameter of the hollow cylindrical boss of the support seat, so that the hollow armature can freely shuttle between the hollow cylindrical boss of the base and the hollow cylindrical boss of the support seat; the lower end surface of the hollow armature can be connected with the stainless steel eye screw of the steel rope assembly through the threaded hole; the steel rope can pass through the long through hole on the base; The inner diameter of the hollow cylindrical boss of the load-bearing platform is larger than the outer diameter of the hollow cylindrical boss of the base, and the outer diameter of the hollow cylindrical boss of the load-bearing platform is smaller than the inner diameter of the through hole of the hollow static iron core. The hollow cylindrical boss of the load-bearing platform can pass downward through the through hole of the hollow static iron core and be sleeved on the outside of the hollow cylindrical boss of the base, and the flat end of the load-bearing platform faces upward for loading a certain weight of items.

[0006] Furthermore, there are at least three long through holes, which are arranged at equal intervals around the hollow columnar boss of the base; and there are three steel rope assemblies.

[0007] Furthermore, there are three long through holes.

[0008] Furthermore, the long through hole is an arc-shaped through hole.

[0009] Furthermore, the notch angle of the support ring is 90-120 degrees.

[0010] Furthermore, the notch angle of the support ring is 120 degrees.

[0011] Furthermore, the legs of the bracket include a vertical section connected to the edge of the supporting panel and a horizontal section extending horizontally outward from the bottom of the vertical section.

[0012] A method for testing the performance of a hollow electromagnetic coil, including parameter measurement without a hollow static iron core: 1) The hollow armature passes through the hollow columnar boss of the base and is placed on the upper surface of the base. The lower end of the hollow armature is connected to the steel rope assembly. The stainless steel eye screw at one end of the steel rope assembly is fixed to the threaded hole at the lower end of the hollow armature. The stainless steel hook at the other end of the steel rope assembly passes through the long through hole on the base to ensure smooth shuttle. 2) The lower end surface of the support ring is embedded in the first annular groove on the upper surface of the base, and the second annular groove on the lower surface of the support seat is embedded in the upper end surface of the support ring to connect the base and the support seat; 3) Pass the electromagnetic coil through the hollow cylindrical boss of the support seat and place it flat on the upper surface of the support seat; 4) Use a vernier caliper to measure the distance L1 between the upper end surface of the hollow armature and the upper end surface of the hollow cylindrical boss of the support seat (the vernier caliper is used to measure the gap between the hollow cylindrical boss of the support seat and the base); 5) Power on the electromagnetic coil, and the hollow armature will be affected by the electromagnetic force, overcome its own gravity and move upward. After it reaches a balanced static state, read the voltage V1 and current I1 passing through the electromagnetic coil at this time; use a vernier caliper to measure the distance L2 between the upper end surface of the hollow armature and the upper end surface of the hollow cylindrical boss of the support seat; 6) The distance the hollow armature moves upward, i.e. the stroke S=L1-L2; 7) Use the hook of the dynamometer to connect the stainless steel hook of the steel rope assembly, pull evenly to make the hollow armature move from a static state, and read the tension value F1, coil voltage V2, and current I2 when the hollow armature starts to move from a static state. Repeat the test process 3 times, take the average value, and obtain the electromagnetic force, coil voltage, and current of the hollow armature.

[0013] Furthermore, it also includes the measurement of parameters of the hollow static iron core 1) The through hole of the hollow armature passes through the hollow columnar boss of the base and is placed on the upper surface of the base. The lower end of the hollow armature is connected to the steel rope assembly. The stainless steel eye screw at one end of the steel rope assembly is fixed to the threaded hole at the lower end of the hollow armature. The stainless steel hook at the other end of the steel rope passes through the long through hole on the base to ensure smooth shuttle. 2) The lower end surface of the support ring is embedded in the first annular groove on the upper surface of the base, and the second annular groove on the lower surface of the support seat is embedded in the upper end surface of the support ring to connect the base and the support seat; 3) Pass the hollow electromagnetic coil through the hollow cylindrical boss of the support base and place it flat on the upper surface of the chassis of the support base; 4) Insert the hollow cylindrical boss of the hollow static iron core downward into the hollow cylindrical boss of the support seat, with the flat end placed flat on the end surface of the hollow cylindrical boss of the support seat; 5) Use a vernier caliper to measure the distance L3 between the upper end surface of the hollow armature and the upper end surface of the hollow cylindrical boss of the support seat (the vernier caliper is used to measure the gap between the support seat, the base and the hollow cylindrical boss of the hollow armature); 6) Power on the electromagnetic coil, and the hollow armature will be affected by the electromagnetic force, overcome its own gravity and move upward. After it reaches a balanced static state, read the voltage V3 and current I3 passing through the electromagnetic coil at this time; use a vernier caliper to measure the distance L4 between the upper end surface of the hollow armature and the upper end surface of the hollow cylindrical boss of the support seat; 7) The distance the hollow armature moves upward, i.e. the stroke S=L3-L4; 8) Use a dynamometer to hook the stainless steel hook of the steel rope assembly, pull evenly to make the hollow armature move from a stationary state, and read the tension value F2, coil voltage V4, and current I4 when the hollow armature starts to move from a stationary state. Repeat the test process 3 times and take the average value to obtain the electromagnetic force, coil voltage, and current of the hollow armature.

[0014] Furthermore, it also includes using a load-bearing platform to perform magnetic testing 1) The through hole of the hollow armature passes through the hollow cylindrical boss of the base and is placed on the upper surface of the base; 2) The lower end surface of the support ring is embedded in the first annular groove on the upper surface of the base, and the second annular groove on the lower surface of the support seat is embedded in the upper end surface of the support ring to connect the base and the support seat; 3) Pass the hollow electromagnetic coil through the hollow cylindrical boss of the support base and place it flat on the upper surface of the chassis of the support base; 4) Insert the hollow cylindrical boss of the hollow static iron core downward into the hollow cylindrical boss of the support seat, with the flat end placed flat on the end surface of the hollow cylindrical boss of the support seat; 5) Insert the hollow cylindrical boss of the load platform into the hollow cylindrical boss of the base downward. The hollow cylindrical boss of the load platform is long enough to ensure reliable contact with the upper end surface of the hollow armature, and the flat end of the load platform faces upward; 6) Power on the electromagnetic coil, and the hollow armature will be affected by the electromagnetic force, overcoming its own gravity and the gravity of the load-bearing platform and moving upward. After it reaches a balanced static state, use a vernier caliper to measure the distance L5 between the plane end of the load-bearing platform and the lower surface of the base, and keep monitoring the distance; 7) Apply a weight block to the flat end of the load-bearing platform. When the load-bearing platform starts to move downward from a stationary state, that is, when the hollow armature starts to move downward from a stationary state, weigh the load-bearing platform and the weight block on it, and convert it into the electromagnetic force exerted on the hollow armature. Repeat this test process 3 times and take the average value; The calculation formula is as follows: F=(m1+m2)×g Where: F represents the electromagnetic force exerted on the hollow armature 5; m1 represents the weight of the load-carrying platform 7 itself, in kg; m2 represents the weight of the weight block, in kg; g represents the acceleration due to gravity, with the unit of N / Kg.

[0015] The technical features of the present invention are as follows: 1. The present invention adopts a modular design concept. Each component of the test device is independent and can be flexibly configured according to specific requirements to achieve measurement of relevant parameters of the electromagnetic coil.

[0016] 2. The present invention conducts comparative tests on parameters such as electromagnetic force, armature stroke, voltage, and current under two test conditions: installing a hollow static iron core and not installing a hollow static iron core.

[0017] 3. The load-bearing platform of the present invention can be used to place weights and weight blocks to test the magnitude of the magnetic force on the armature. The plane size of the load-bearing platform can be designed according to actual needs. In particular, when the armature is adsorbed by a large electromagnetic force, using the load-bearing platform to load a weight block for electromagnetic force testing is a relatively simple method.

[0018] 4. The support ring described in the present invention can be designed with different height sizes according to actual needs to establish test conditions with different distances between the upper end face of the armature and the upper end face of the hollow boss of the support seat, and to verify that when the same armature is at different distances from the lower end face of the electromagnetic coil, parameters such as the armature stroke and the initial electromagnetic force are compared and tested.

[0019] 5. The hollow armature of the present invention can be designed into various special-shaped appearances according to actual application requirements.

[0020] 6. The size of each component described in the present invention can be flexibly designed according to actual test requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of the base from above according to the present invention.

[0022] Figure 2 for Figure 1 AA section view in .

[0023] Figure 3 Schematic diagram of the top view of the support ring of the present invention.

[0024] Figure 4 for Figure 3 Side view of.

[0025] Figure 5 A schematic diagram of the structure of the support seat from top view according to the present invention.

[0026] Figure 6 for Figure 5 BB cross-sectional view in .

[0027] Figure 7 Schematic diagram of the top view of the structure of the hollow static iron core of the present invention.

[0028] Figure 8 for Figure 7 Schematic diagram of CC cross-section in .

[0029] Fig. 9 Schematic diagram of the top view of the hollow armature structure of the present invention.

[0030] Fig.10 for Fig. 9 DD cross-sectional diagram.

[0031] Fig.11 This is a schematic diagram of the structure of the steel rope assembly of the present invention.

[0032] Fig.12 Schematic diagram of the structure of the load-bearing platform of the present invention from a top view.

[0033] Fig.13 for Fig.12 EE cross-sectional diagram.

[0034] Fig.14 Schematic diagram of the front view structure of the bracket of the present invention.

[0035] Fig.15 A schematic diagram of the structure of the bracket according to the present invention from a top view.

[0036] Fig.16 Schematic diagram of the wiring when measuring the electromagnetic coil.

[0037] Fig.17 Schematic diagram of the test structure without a hollow static iron core.

[0038] Fig.18 Schematic diagram of the hollow static core test structure.

[0039] Fig.19 Schematic diagram of the magnetic test structure of the load-bearing platform.

[0040] 1-base, 2-support ring, 3-support seat, 4-hollow static iron core, 5-hollow armature, 6-steel rope assembly, 7-load-carrying platform, 8-bracket, 9-electromagnetic coil, 10-tensile gauge; 11-first annular groove, 12-arc-shaped through hole; 31 - second annular groove; 51 - threaded hole. DETAILED DESCRIPTION

[0041] The main technical problems solved by the present invention are: 1) The present invention aims to solve the problem that the existing testing devices cannot complete the tests of the relative relationship between the electromagnetic force and displacement of the electromagnetic coil, the working voltage, the dynamic change of the current, etc., and provides a hollow electromagnetic coil performance testing device.

[0042] 2) The present invention provides a method for solving the performance test of a hollow electromagnetic coil, including the magnetic force size of the electromagnetic coil, the displacement of the movable armature, the working voltage, the current change, etc.

[0043] The present invention is further described below in conjunction with the accompanying drawings.

[0044] The testing device of the present invention comprises: 1) The present invention comprises a base 1, a support ring 2, a support seat 3, a hollow static iron core 4, a hollow armature 5, a steel rope assembly 6, a load-carrying platform 7, a bracket 8, a DC power supply, and an ammeter and a voltmeter. The upper surface of the base 1 is provided with a first annular groove 11, and a hollow columnar boss is axially provided on the upper surface. At the same time, an arc-shaped through hole 12 is provided on the base 1, such as Figure 1 , 2 As shown; the lower end surface of the support ring 2 can be embedded in the first annular groove 11 of the base, and the upper end surface can be embedded in the second annular groove 31 on the lower surface of the support seat 3, which is used to connect the base 1 and the support seat 3, and is an open ring, such as Figure 3 , 4 As shown; the support seat 3 is a component having a second annular groove 31 disposed on the lower surface of the chassis, and a hollow cylindrical boss disposed axially on the upper surface of the chassis, such as Figure 5 , 6The hollow static core 4 is flat at one end and has a hollow cylindrical boss at the other end, as shown. Figure 7 , 8 The center of the hollow armature 5 is a through hole, and the lower end surface is evenly provided with threaded holes 51, as shown Fig. 9 , 10 As shown; the steel rope assembly 6 is a steel rope with a stainless steel eye screw connected to one end and a stainless steel hook ring connected to the other end of the steel rope. Fig.11 The load-bearing platform 7 is a component having a flat surface at one end and a hollow cylindrical boss at the other end, as shown in FIG. Fig.12 , 13 The bracket 8 is used to provide support for the entire test system, and is also convenient for the dynamometer to test the magnetic force of the hollow armature, such as Fig.14 , 15 As shown; the DC power supply is used to provide power to the electromagnetic coil, and the ammeter and voltmeter are used to monitor the working voltage and working current of the electromagnetic coil in real time. The electrical wiring relationship is as shown Fig.16 shown.

[0045] 2) The base of the present invention is made of non-magnetic steel material, and the hollow cylindrical boss thereon serves to provide an axial guide track for the hollow armature. The base is an independent component.

[0046] 3) The support ring of the present invention is made of non-magnetic steel material, and its main function is to provide support for the electromagnetic coil on the support seat and the external force from the load-bearing platform, and to provide an initial position for the hollow armature. The support ring is an independent part.

[0047] 4) The support seat of the present invention is made of non-magnetic steel material, wherein the outer diameter of the hollow cylindrical boss is determined according to the inner diameter of the electromagnetic coil frame, and the outer diameter of the support seat chassis is determined according to the outer diameter of the electromagnetic coil frame. Its main function is to pass the electromagnetic coil through the support seat boss and place it securely and flatly on the support seat, and it is an independent component.

[0048] 5) The hollow static iron core of the present invention is made of carbon steel, wherein the outer diameter of the hollow cylindrical boss is slightly smaller than the inner diameter of the hollow cylindrical boss of the support seat, and the boss end faces downward and can be inserted into the hollow cylindrical boss of the support seat, with the flat end placed flat on the end face of the boss of the support seat. It is used as a static iron core in the test system. When the coil is energized, the hollow static iron core is magnetized and becomes a magnet. This hollow static iron core is an independent component.

[0049] 6) The hollow armature of the present invention is made of carbon steel, the inner diameter of the central through hole is slightly larger than the outer diameter of the base boss, and the outer diameter is slightly smaller than the inner diameter of the hollow cylindrical boss of the support seat, and can freely shuttle between the hollow cylindrical boss of the base and the hollow cylindrical boss of the support seat. The lower end surface of the hollow armature can be connected to the steel rope assembly. The hollow armature is an independent component.

[0050] 7) The load-bearing platform of the present invention is made of non-magnetic steel material, and the size of its plane end can be estimated based on the expected magnetic force. When the expected magnetic force is large, the outer diameter of its plane end can be appropriately increased to accommodate larger heavy blocks. The inner diameter of the hollow cylindrical boss is slightly larger than the outer diameter of the base boss, and the outer diameter is slightly smaller than the inner diameter of the hollow static iron core boss. When in use, the hollow boss is inserted downward into the base cylindrical boss with the plane end facing upward. The upper surface of the plane end of the load-bearing platform can be loaded with a certain weight of items, and is mainly used to test the large magnetic force generated after the hollow armature and the hollow static iron core are attracted. This load-bearing platform is an independent component.

[0051] 8) The bracket of the present invention is made of non-magnetic steel material, the size of its plane end can be designed according to the size of the base, and the height is designed according to the overall length of the steel rope assembly and the dynamometer. The through hole of its plane end is not less than the outer diameter of the hollow armature.

[0052] The measuring method of the present invention is as follows: 1. Parameter measurement (without hollow static core): (1) The hollow armature passes through the hollow cylindrical boss of the base and is placed on the upper surface of the base. The lower end of the hollow armature is connected to three steel rope assemblies. The stainless steel eye screw at one end of the steel rope assembly is fixed to the threaded hole at the lower end of the hollow armature. Three hooks are set at the other end of the steel rope. The hooks pass through the three arc-shaped through holes on the base to ensure smooth shuttle.

[0053] (2) The lower end surface of the support ring is embedded in the first annular groove on the upper surface of the base, and the second annular groove on the lower surface of the support seat is embedded in the upper end surface of the support ring to connect the base and the support seat.

[0054] (3) Pass the electromagnetic coil through the hollow cylindrical boss of the support base and place it flat on the upper surface of the support base.

[0055] (4) Use a vernier caliper to measure the distance L1 between the upper end surface of the hollow armature and the upper end surface of the hollow cylindrical boss of the support seat.

[0056] (5) When the electromagnetic coil is energized, the armature is acted upon by the electromagnetic force and overcomes its own gravity to move upward. After it reaches a balanced static state, read the voltage V1 and current I1 passing through the electromagnetic coil at this time; use a vernier caliper to measure the distance L2 between the upper end surface of the hollow armature and the upper end surface of the hollow boss of the support seat.

[0057] (6) The distance the armature moves upward, that is, the stroke S = L1-L2.

[0058] (7) Use a dynamometer to hook the three hooks of the steel rope assembly and pull evenly to make the hollow armature move from a stationary state. Read the tension value F1, coil voltage V2, and current I2 when the hollow armature starts to move from a stationary state. Repeat this test process three times and take the average value to obtain the electromagnetic force, coil voltage, and current of the hollow armature.

[0059] For specific tests, see Fig.17 shown.

[0060] 2. Parameter measurement (including hollow static iron core) (1) The hollow armature through hole passes through the hollow cylindrical boss of the base and is placed on the upper surface of the base. The lower end of the hollow armature is connected to three steel rope assemblies. The stainless steel eye screw at one end of the steel rope assembly is fixed to the threaded hole at the lower end of the hollow armature. Three hooks are set at the other end of the steel rope. The hooks pass through the three arc-shaped through holes on the base to ensure smooth shuttle.

[0061] (2) The lower end surface of the support ring is embedded in the annular groove on the upper surface of the base, and the annular groove on the lower surface of the support seat is embedded in the upper end surface of the support ring to connect the base and the support seat.

[0062] (3) Pass the hollow electromagnetic coil through the hollow cylindrical boss of the support seat and place it flat on the upper surface of the support seat.

[0063] (4) Insert the hollow cylindrical boss of the hollow static iron core downward into the hollow cylindrical boss of the support seat, with the flat end placed flat on the end face of the boss of the support seat.

[0064] (5) Use a vernier caliper to measure the distance L3 between the upper end surface of the hollow armature and the upper end surface of the hollow cylindrical boss of the support seat.

[0065] (6) When the electromagnetic coil is energized, the hollow armature is acted upon by the electromagnetic force and overcomes its own gravity to move upward. After it reaches a balanced static state, read the voltage V3 and current I3 passing through the electromagnetic coil at this time; use a vernier caliper to measure the distance L4 between the upper end surface of the hollow armature and the upper end surface of the hollow boss of the support seat.

[0066] (7) The distance the hollow armature moves upward, that is, the stroke S = L3-L4.

[0067] (8) Use a dynamometer to hook the three hooks of the steel rope assembly and pull evenly to make the hollow armature move from a stationary state. Read the tension value F2, coil voltage V4, and current I4 when the hollow armature starts to move from a stationary state. Repeat this test process three times and take the average value to obtain the electromagnetic force, coil voltage, and current of the hollow armature.

[0068] For specific tests, see Fig.18 shown.

[0069] 3. Use the load-bearing platform to perform magnetic testing (1) The hollow armature through hole passes through the hollow cylindrical boss of the base and is placed on the upper surface of the base.

[0070] (2) The lower end surface of the support ring is embedded in the first annular groove on the upper surface of the base, and the second annular groove on the lower surface of the support seat is embedded in the upper end surface of the support ring to connect the base and the support seat.

[0071] (3) Pass the hollow electromagnetic coil through the hollow cylindrical boss of the support seat and place it flat on the upper surface of the support seat.

[0072] (4) Insert the hollow cylindrical boss of the hollow static iron core downward into the hollow cylindrical boss of the support seat, with the flat end placed flat on the end face of the boss of the support seat.

[0073] (5) Insert the hollow cylindrical boss of the load platform into the hollow cylindrical boss of the base with the boss facing downward. The cylindrical boss of the load platform should be long enough to ensure reliable contact with the upper end surface of the hollow armature, and the flat end of the load platform should face upward.

[0074] (6) When the electromagnetic coil is energized, the hollow armature is acted upon by the electromagnetic force, overcoming its own gravity and the gravity of the load-bearing platform and moving upward. After it reaches a balanced static state, use a vernier caliper to measure the distance L5 between the flat end of the load-bearing platform and the bottom surface of the base, and keep monitoring this distance.

[0075] (7) Apply a weight block (weight) to the flat end of the load-bearing platform. When the load-bearing platform starts to move downward from a stationary state, that is, when the hollow armature starts to move downward from a stationary state, weigh the load-bearing platform and the weight block on it (in kg) and convert it into the magnetic force exerted on the hollow armature. Repeat the test process 3 times and take the average value.

[0076] F=(m1+m2)×g Where: F represents the electromagnetic force on the hollow armature; m1 represents the weight of the load platform itself, in kg; m2 represents the weight of the weight block, in kg; g represents the acceleration due to gravity, with the unit of N / Kg.

[0077] For specific tests, see Fig.19 shown.

Claims

1. A hollow electromagnetic coil performance testing device, characterized in that: The invention comprises a base (1), a support ring (2), a support seat (3), a hollow static iron core (4), a hollow armature (5), a steel rope assembly (6), a load-bearing platform (7), a bracket (8), a DC power supply, an ammeter, and a voltmeter; the base (1) is provided with a central through hole, a hollow cylindrical boss is axially arranged on the upper surface and is in communication with the central through hole in equal diameter, a first annular groove (11) is arranged near the edge of the upper surface, and a plurality of long through holes are arranged on the base (1) around the hollow cylindrical boss; the support ring (2) is an open ring; the support seat (3) comprises a chassis with a central through hole, a second annular groove (31) is arranged near the edge of the lower surface of the chassis, a hollow cylindrical boss is axially arranged on the upper surface of the chassis and is in communication with the central through hole in equal diameter, the lower end surface of the support ring (2) can be embedded in the first annular groove (11) of the base (1), and the upper end surface can be embedded in the support ring (2). The second annular groove (31) of the seat (3) is used to connect the base (1) and the support seat (3); the hollow static iron core (4) is provided with a central through hole, one end of the hollow static iron core (4) is a plane, and the other end is axially provided with a hollow cylindrical boss that is equal to the diameter of the central through hole; the center of the hollow armature (5) is a through hole, and a plurality of threaded holes (51) are evenly arranged around the through hole on the lower end surface; the steel rope assembly (6) includes a steel rope, a stainless steel eye screw connected to one end of the steel rope, and a stainless steel hook connected to the other end of the steel rope; one end of the load-bearing platform (7) is a plane, and the other end is provided with a hollow cylindrical boss; the bracket (8) includes a support panel with a central hole and a leg surrounding the support panel and bearing the support surface; the DC power supply is used to provide power to the electromagnetic coil (9), and the ammeter and voltmeter are used to monitor the working voltage and working current of the electromagnetic coil (9) in real time; The base (1), support ring (2), support seat (3), load-bearing platform (7), and bracket (8) are made of non-magnetic steel material, and the hollow static iron core (4) and hollow armature (5) are made of carbon steel material; the hollow columnar boss on the base (1) can provide an axial guide track for the hollow armature (5); the outer diameter size of the hollow columnar boss of the support seat (3) is determined according to the inner diameter size of the frame of the electromagnetic coil (9), and the outer diameter size of the chassis of the support seat (3) is determined according to The outer diameter of the electromagnetic coil (9) skeleton is determined to ensure that the electromagnetic coil (9) passes through the hollow cylindrical boss of the support seat (3) and can be placed flat on the chassis of the support seat (3); the outer diameter of the hollow cylindrical boss of the hollow static iron core (4) is smaller than the inner diameter of the hollow cylindrical boss of the support seat (3); the hollow cylindrical boss of the hollow static iron core (4) faces downward and can be inserted into the hollow cylindrical boss of the support seat (3), and the flat end is placed flat on the end surface of the hollow cylindrical boss of the support seat (3); The inner diameter of the central through hole of the hollow armature (5) is larger than the outer diameter of the hollow cylindrical boss of the base (1), and the outer diameter of the hollow armature (5) is smaller than the inner diameter of the hollow cylindrical boss of the support seat (3), so that the hollow armature (5) can freely shuttle between the hollow cylindrical boss of the base (1) and the hollow cylindrical boss of the support seat (3); the lower end surface of the hollow armature (5) can be connected to the stainless steel eye screw of the steel rope assembly (6) through the threaded hole (51); the steel rope can pass through the long through hole on the base (1); The inner diameter of the hollow cylindrical boss of the load-bearing platform (7) is larger than the outer diameter of the hollow cylindrical boss of the base (1), and the outer diameter of the hollow cylindrical boss of the load-bearing platform (7) is smaller than the inner diameter of the through hole of the hollow static iron core (4). The hollow cylindrical boss of the load-bearing platform (7) can pass downward through the through hole of the hollow static iron core (4) and be sleeved on the outside of the hollow cylindrical boss of the base (1). The flat end of the load-bearing platform (7) faces upward for loading a certain weight of objects.

2. A hollow electromagnetic coil performance testing device as claimed in claim 1, characterized in that: There are at least three long through holes, which are arranged at equal intervals around the hollow columnar boss of the base (1); and there are three steel rope assemblies (6).

3. A hollow electromagnetic coil performance testing device as claimed in claim 2, characterized in that: There are three long through holes.

4. A hollow electromagnetic coil performance testing device as described in claims 1-3, characterized in that: The long through hole is an arc-shaped through hole (12).

5. A hollow electromagnetic coil performance testing device as described in any one of claims 1 to 3, characterized in that: The notch angle of the support ring (2) is 90-120 degrees.

6. A hollow electromagnetic coil performance testing device as claimed in claim 5, characterized in that: The notch angle of the support ring (2) is 120 degrees.

7. A hollow electromagnetic coil performance testing device as described in any one of claims 1 to 3, characterized in that: The legs of the bracket (8) comprise a vertical section connected to the edge of the supporting panel and a horizontal section extending horizontally outward from the bottom of the vertical section.

8. A hollow electromagnetic coil performance testing device as claimed in claim 4, characterized in that: The legs of the bracket (8) comprise a vertical section connected to the edge of the supporting panel and a horizontal section extending horizontally outward from the bottom of the vertical section.

9. A hollow electromagnetic coil performance testing device as claimed in claim 5, characterized in that: The legs of the bracket (8) comprise a vertical section connected to the edge of the supporting panel and a horizontal section extending horizontally outward from the bottom of the vertical section.

10. A hollow electromagnetic coil performance test method according to claim 1, implemented by a hollow electromagnetic coil performance test device according to any one of claims 1 to 9, characterized in that: Including parameter measurement without hollow static iron core: 1) The hollow armature (5) passes through the hollow columnar boss of the base (1) and is placed on the upper surface of the base (1). The lower end surface of the hollow armature (5) is connected to the steel rope assembly (6). The stainless steel eye screw at one end of the steel rope assembly (6) is fixed to the threaded hole (51) at the lower end surface of the hollow armature (5). The stainless steel hook ring at the other end of the steel rope assembly (6) passes through the long through hole on the base to ensure smooth shuttle movement. 2) The lower end surface of the support ring (2) is embedded in the first annular groove (11) on the upper surface of the base (1), and the second annular groove (31) on the lower surface of the support seat (3) is embedded in the upper end surface of the support ring (2), so as to connect the base (1) and the support seat (3); 3) passing the electromagnetic coil (9) through the hollow cylindrical boss of the support seat (3) and placing it flat on the upper surface of the support seat (3); 4) Using a vernier caliper, measure the distance L1 between the upper end surface of the hollow armature (5) and the upper end surface of the hollow cylindrical boss of the support seat (3); 5) The electromagnetic coil (9) is energized, and the hollow armature (5) is subjected to the electromagnetic force to overcome its own gravity and move upward. After it reaches a balanced static state, the voltage V1 and the current I1 passing through the electromagnetic coil (9) are read; and the distance L2 between the upper end surface of the hollow armature (5) and the upper end surface of the hollow cylindrical boss of the support seat (3) is measured with a vernier caliper; 6) The distance the hollow armature (5) moves upward, i.e. the stroke S = L1-L2; 7) Use the hook of the tension meter (10) to connect the stainless steel hook of the steel rope assembly (6), and evenly pull the hollow armature (5) to move from a stationary state. Read the tension value F1, coil voltage V2, and current I2 when the hollow armature (5) starts to move from a stationary state. Repeat this test process 3 times, take the average value, and obtain the electromagnetic force, coil voltage, and current of the hollow armature (5).

11. A hollow electromagnetic coil performance testing method as claimed in claim 10, characterized in that: Also includes parameter measurement of hollow static iron core 1) The through hole of the hollow armature (5) passes through the hollow columnar boss of the base (1) and is placed on the upper surface of the base (1); the lower end surface of the hollow armature (5) is connected to the steel rope assembly (6); the stainless steel eye screw at one end of the steel rope assembly (6) is fixed to the threaded hole (51) at the lower end surface of the hollow armature (5); the stainless steel hook ring at the other end of the steel rope passes through the long through hole on the base (1) to ensure smooth shuttle; 2) the lower end surface of the support ring (2) is embedded in the first annular groove (11) on the upper surface of the base (1), and the second annular groove (31) on the lower surface of the support seat (3) is embedded in the upper end surface of the support ring (2), so as to connect the base (1) and the support seat (3); 3) passing the hollow electromagnetic coil (9) through the hollow columnar boss of the support base (3) and placing it flat on the upper surface of the bottom plate of the support base (3); 4) inserting the hollow cylindrical boss of the hollow static iron core (4) downward into the hollow cylindrical boss of the support seat (3), with the flat end placed flat on the end surface of the hollow cylindrical boss of the support seat (3); 5) Use a vernier caliper to measure the distance L3 between the upper end surface of the hollow armature (5) and the upper end surface of the hollow cylindrical boss of the support seat (3); 6) The electromagnetic coil (9) is energized, and the hollow armature (5) is subjected to the electromagnetic force to overcome its own gravity and move upward. After it reaches a balanced static state, the voltage V3 and the current I3 passing through the electromagnetic coil (9) are read; and the distance L4 between the upper end surface of the hollow armature (5) and the upper end surface of the hollow cylindrical boss of the support seat (3) is measured with a vernier caliper; 7) The distance the hollow armature (5) moves upward, i.e. the stroke S = L3-L4; 8) Use a dynamometer (10) to hook the stainless steel hook of the steel rope assembly (6), and evenly pull the hollow armature (5) to move from a stationary state. Read the tension value F2, coil voltage V4, and current I4 when the hollow armature (5) starts to move from a stationary state. Repeat this test process 3 times, take the average value, and obtain the electromagnetic force, coil voltage, and current of the hollow armature 5.

12. A method for testing the performance of a hollow electromagnetic coil according to claim 10 or 11, characterized in that: Also includes using the load platform (7) to perform magnetic testing 1) The through hole of the hollow armature (5) passes through the hollow columnar boss of the base (1) and is placed on the upper surface of the base (1); 2) the lower end surface of the support ring (2) is embedded in the first annular groove (11) on the upper surface of the base (1), and the second annular groove (31) on the lower surface of the support seat (3) is embedded in the upper end surface of the support ring (2), so as to connect the base (1) and the support seat (3); 3) passing the hollow electromagnetic coil (9) through the hollow columnar boss of the support base (3) and placing it flat on the upper surface of the bottom plate of the support base (3); 4) inserting the hollow cylindrical boss of the hollow static iron core (4) downward into the hollow cylindrical boss of the support seat (3), with the flat end placed flat on the end surface of the hollow cylindrical boss of the support seat (3); 5) Insert the hollow cylindrical boss of the load-bearing platform (7) downward into the hollow cylindrical boss of the base (1), the hollow cylindrical boss of the load-bearing platform (7) is long enough to ensure reliable contact with the upper end surface of the hollow armature (5), and the flat end of the load-bearing platform (7) faces upward; 6) The electromagnetic coil (9) is energized, and the hollow armature (5) is acted upon by the electromagnetic force to overcome its own weight and the weight of the load-carrying platform (7) and move upward. After it reaches a balanced static state, a vernier caliper is used to measure the distance L5 between the plane end of the load-carrying platform (7) and the lower surface of the base (1), and the distance is monitored; 7) applying a weight block to the plane end of the load-bearing platform (7), and when the load-bearing platform (7) starts to move downward from a stationary state, that is, when the hollow armature (5) starts to move downward from a stationary state, the load-bearing platform (7) and the weight block thereon are weighed and converted into the electromagnetic force exerted on the hollow armature (5). The test process is repeated 3 times and the average value is taken; The calculation formula is as follows: F=(m1+m2)×g Where: F represents the electromagnetic force exerted on the hollow armature 5; m1 represents the weight of the load-carrying platform 7 itself, in kg; m2 represents the weight of the weight block, in kg; g represents the acceleration due to gravity, with the unit of N / Kg.

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