A motor load performance detection device and method

Abstract

The present invention discloses a motor load performance detection device and method, which relates to the technical field of motor detection; in order to solve the efficiency problem; specifically includes a load detection part and a station switching part. The station switching part includes a support disk supported on the ground by support legs and two groups of fixing components arranged on the top of the support disk. The load detection part includes a variable load supported on the ground by a support box and a quick connector for mating with the input of the motor to be tested. A torque sensor and a rotational speed sensor are arranged between the quick connector and the input end of the variable load; a linear guide groove and an arc guide groove are formed on the upper surface of the support disk. By setting two groups of fixing components, when one group is in the detection process, workers can disassemble and install the motor to be tested on the other group at the same time, so as to realize time coordination in the process and improve the efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of motor detection, and particularly to a motor load performance detection device and method. Background Art

[0002] Before the motor is calibrated and shipped from the factory, it needs to be subjected to load detection. Specifically, a load is provided to the output shaft of the motor by using damping, and then the motor is started to test its electrical parameters and the output performance of torque and speed.

[0003] After retrieval, a patent with the Chinese patent publication number CN212008858U discloses a motor load detection device, including a bottom plate. A positioning mechanism for restricting the position of the motor to be tested and a load detection mechanism for performing load detection on the motor to be tested are provided on the bottom plate. The load detection mechanism is located in front of the positioning mechanism. The positioning mechanism includes a movable plate slidably fitted on the bottom plate in the front-rear direction, a positioning block fixedly connected to the movable plate and restricting the left-right movement of the motor to be tested, and a rotary cylinder located on one side of the positioning block. The output shaft of the rotary cylinder is arranged vertically, and a connecting block arranged horizontally is fixedly connected to the upper end of the output shaft. A first fixing hole with a vertically downward opening is provided at one end of the connecting block deviating from the output shaft, and a threaded structure is provided on the inner surface of the first fixing hole and the outer surface of the pressing block for mutual cooperation.

[0004] The above patent has the following deficiencies: It needs to perform the operations of motor fixing - detection - motor blanking in sequence, and cannot realize the cross - simultaneous execution of multiple processes, which results in low detection efficiency.

[0005] Therefore, the present invention proposes a motor load performance detection device and method. Summary of the Invention

[0006] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to propose a motor load performance detection device and method.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A motor load performance detection device includes a load detection part and a station switching part.

[0009] The station switching part includes a support disk supported on the ground by support legs and two groups of fixing components arranged on the top of the support disk. The load detection part includes a variable load supported on the ground by a support box and a quick - connector for mating with the input of the motor to be tested. A torque sensor and a speed sensor are arranged between the quick - connector and the input end of the variable load.

[0010] A linear guide groove and an arc - shaped guide groove are provided on the upper surface of the support disk.

[0011] The fixed component includes a mounting frame for mounting the motor to be tested and a guiding component movably and limit-fitted to the linear guide groove and the arc-shaped guide groove. The guiding component includes a first roller, a second roller, and a third roller that are rollingly fitted to the inner walls of the linear guide groove and the arc-shaped guide groove. The tops of the first roller and the second roller are rotatably connected to the same second push frame. The tops of the second roller and the third roller are rotatably connected to the same first push frame. The top of the third roller is also rotatably connected to a connecting rod, and the other end of the connecting rod is fixedly connected to the same rotating frame. The rotating frame is rotatably connected to the support disc through a main shaft;

[0012] The mounting frame is fixed to the outer wall of the top of the second push frame;

[0013] The quick connector includes a hollow shaft and a flat key that is keyed to the output shaft key groove of the motor to be tested. The flat key is slidably connected to the radial direction of the hollow shaft, and one side of the flat key is provided with an inclined surface. The other side of the flat key is fixed with an end plate, and the end plate is connected to the outer wall of the hollow shaft through a first spring;

[0014] A first motor is fixed to the outer wall of the bottom of the support disc through a motor frame, and the output shaft of the first motor is connected to the end of the main shaft through a coupling.

[0015] Preferably: The variable load includes a stator coil, a rotor core, and a housing. The rotor core is rotatably connected to the inner wall of the housing through an input shaft. The stator coil is fixed to the inner wall of the housing, and the rotor core and the stator coil cooperate with each other.

[0016] Further: Multiple stator electrodes are led out from different positions of the coil of the stator coil, and the stator electrodes are fixed to the outer wall of the housing through an insulating plate.

[0017] Based on the foregoing solution: One end of the stator coil is connected to an energy storage device. A protective shell is fixed to the outer wall of the top of the support box through bolts. A plurality of electrode arms that cooperate with the stator electrodes are rotatably connected to the inside of the protective shell through a connecting shaft. One end of the electrode arm is connected to the inner wall of the protective shell through a second spring, and an electromagnet is fixed to the other end of the electrode arm. Another electromagnet that cooperates with this electromagnet is fixed to the inner wall of the protective shell.

[0018] A better solution in the foregoing solution is: A plurality of the electrode arms are connected to another terminal of the energy storage device.

[0019] As a further solution of the present invention: A ball storage cylinder is fixed inside the support box. A blanking component is provided at the discharge port of the ball storage cylinder. A Galton board is fixed to the bottom of the discharge port of the ball storage cylinder. A switch component is provided at the bottom of the Galton board. The ball storage cylinder is loaded with balls that cooperate with the Galton board.

[0020] Meanwhile, the blanking assembly includes a second motor and a blanking roller. The blanking roller is rotatably connected to the discharge port of the ball storage cylinder. A material storage groove for storing one ball is provided on the side wall of the blanking roller. The second motor is fixed to the side wall of the ball storage cylinder by bolts, and the output shaft of the second motor is fixed to the end of the blanking roller.

[0021] As a preferred embodiment of the present invention: The switch assembly includes a first switch housing and a second switch housing that are fixedly connected to each other. A plurality of ball dropping channels corresponding to the ball outlet of the Galton board and open on one side are provided on the inner wall of the second switch housing. A pressing plate is provided on the inner wall of the ball dropping channel. The pressing plate is slidably connected to the first switch housing through the switch assembly. A fourth spring is buckled on the outer wall of the opposite side of the Galton board and the first switch housing. A sliding frame is horizontally slidably connected to the inner wall of the first switch housing. The sliding frame is connected to the inner wall of the first switch housing through a third spring.

[0022] Meanwhile, a slope and a flat surface for cooperating with the buckle rod are provided on the inner wall of the sliding frame. An electrode sheet one is fixed to the bottom of the pressing plate. An electrode sheet two for cooperating with the electrode sheet one is fixed to the top of the first switch housing. A group of electrode sheet one and electrode sheet two are connected in series in the power supply circuit of a group of electromagnets.

[0023] A method for detecting the load performance of an electric motor includes the following steps:

[0024] S1: Load the motor to be tested on the mounting rack, then start the first motor to transport the mounting rack to the detection station. At the same time, disassemble the motor to be tested on the mounting rack that has been detected and install the remaining motors to be tested.

[0025] S2: Set the detection time period, and use the timing method to control the start period of the blanking assembly according to the detection time period to perform fluctuating load detection.

[0026] S3: During the fluctuating load detection process, collect electrical parameters through an ammeter, a voltmeter, a torque sensor, and a speed sensor to achieve detection.

[0027] The beneficial effects of the present invention are as follows:

[0028] 1. In the present invention, by setting two groups of fixing components, when one group is in the detection process, workers can disassemble and install the motor to be tested on the other group at the same time, so as to realize time coordination in the process and improve efficiency.

[0029] 2. In the present invention, by setting a quick connector, it can be quickly connected to and disconnected from the output shaft of the motor to be tested. In this process, no manual or electric control is required, which increases the convenience of use. And by setting a linear guide groove, an arc guide groove, and a guiding component, it can ensure that the rotation station is switched while reducing the space occupation, and at the same time, the process of cooperation and disconnection between the output shaft of the motor to be tested and the hollow shaft has only linear motion, which increases the docking accuracy.

[0030] 3. In the present invention, by setting the variable load as a combination of a stator coil and a rotor core, and then combining with circuit design, different electrode arms can be controlled to contact the stator electrodes, thereby realizing the control of the number of turns of the stator coil connected to the circuit, and then using the number of turns to control the rotational damping of the rotor core to achieve load adjustment. At the same time, by setting an energy storage device, it can convert the damping into electrical energy for recycling again, thereby greatly reducing the energy consumption as a whole.

[0031] 4. In the present invention, on the basis of the adjustable variable load, by using a Galton board to achieve completely true random load fluctuations, and on the basis of randomness, it also shows a normal distribution. The high-probability ball outlet corresponds to the medium load, that is, the rated load of the motor to be tested, and the low-probability interval is the fluctuating load, so that it can better fit the actual working conditions and increase the rationality of the detection. Description of the Drawings

[0032] Figure 1 It is a schematic diagram of the overall structure of a motor load performance detection device proposed by the present invention;

[0033] Figure 2 It is a schematic diagram of the structure of the fixing component of a motor load performance detection device proposed by the present invention;

[0034] Figure 3 It is a schematic diagram of the structure of the quick connector of a motor load performance detection device proposed by the present invention;

[0035] Figure 4 It is a schematic diagram of the structure of the guiding component of a motor load performance detection device proposed by the present invention;

[0036] Figure 5 It is a schematic diagram of the partial structure of the variable load of a motor load performance detection device proposed by the present invention Figure 1 ;

[0037] Figure 6 It is a schematic diagram of the partial structure of the variable load of a motor load performance detection device proposed by the present invention Figure 2 ;

[0038] Figure 7 It is a schematic diagram of the internal structure of the support box of a motor load performance detection device proposed by the present invention;

[0039] Figure 8 It is a schematic diagram of the sectional structure of the blanking component of a motor load performance detection device proposed by the present invention;

[0040] Figure 9 It is a schematic diagram of the structure of the switch component of a motor load performance detection device proposed by the present invention;

[0041] Figure 10 Schematic diagram of the first electrode plate and the second electrode plate of a motor load performance detection device proposed by the present invention;

[0042] Figure 11 Schematic diagram of the stator coil circuit structure of a motor load performance detection device proposed by the present invention;

[0043] Figure 12 Schematic diagram of the electromagnet circuit structure of a motor load performance detection device proposed by the present invention.

[0044] In the figure: 1, support leg; 2, support disc; 3, fixing component; 4, quick connector; 5, torque sensor; 6, rotational speed sensor; 7, variable load; 8, support box; 9, linear guide groove; 10, mounting rack; 11, guiding component; 12, arc guide groove; 13, first motor; 14, motor frame; 15, hollow shaft; 16, first spring; 17, end plate; 18, flat key; 19, inclined plane; 20, main shaft; 21, rotating frame; 22, connecting rod; 23, first pushing frame; 24, second pushing frame; 25, first roller; 26, second roller; 27, third roller; 28, input shaft; 29, insulating plate; 30, stator electrode; 31, stator coil; 32, rotor core; 33, outer housing; 34, electrode arm; 35, second spring; 36, electromagnet; 37, protective housing; 38, connecting shaft; 39, blanking component; 40, ball storage cylinder; 41, Galton board; 42, switch component; 43, second motor; 44, blanking roller; 45, material receiving groove; 46, first switch housing; 47, third spring; 48, fourth spring; 49, second switch housing; 50, ball dropping channel; 51, pressing plate; 52, buckling rod; 53, slope; 54, flat surface; 55, sliding frame; 56, first electrode plate; 57, second electrode plate. Specific embodiments

[0045] The technical solutions of the present invention will be further described in detail below in conjunction with specific embodiments.

[0046] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0047] Embodiment 1:

[0048] A motor load performance detection device, as Figures 1 - 12As shown, it includes a load detection unit and a station switching unit. The station switching unit includes a support disk 2 supported on the ground by support legs 1 and two sets of fixed components 3 arranged on the top of the support disk 2. The load detection unit includes a variable load 7 supported on the ground by a support box 8 and a quick connector 4 for mating with the input of the motor to be tested. A torque sensor 5 and a rotational speed sensor 6 are arranged between the quick connector 4 and the input end of the variable load 7.

[0049] A linear guide groove 9 and an arc guide groove 12 are formed on the upper surface of the support disk 2.

[0050] The fixed component 3 includes a mounting frame 10 for mounting the motor to be tested and a guiding component 11 movably and limit-fitted to the linear guide groove 9 and the arc guide groove 12. The guiding component 11 includes a roller one 25, a roller two 26, and a roller three 27 that are rollingly fitted to the inner walls of the linear guide groove 9 and the arc guide groove 12. The same push frame two 24 is rotatably connected to the tops of the roller one 25 and the roller two 26. The same push frame one 23 is rotatably connected to the tops of the roller two 26 and the roller three 27. A connecting rod 22 is also rotatably connected to the top of the roller three 27. The other end of the connecting rod 22 is fixedly connected to the same rotating frame 21. The rotating frame 21 is rotatably connected to the support disk 2 through a main shaft 20.

[0051] The mounting frame 10 is fixed to the outer wall of the top of the push frame two 24.

[0052] The quick connector 4 includes a hollow shaft 15 and a flat key 18 that is keyway-fitted to the output shaft of the motor to be tested. The flat key 18 is slidably connected to the radial direction of the hollow shaft 15. One side of the flat key 18 is provided with an inclined surface 19. The other side of the flat key 18 is fixed with an end plate 17. The end plate 17 is connected to the outer wall of the hollow shaft 15 through a spring one 16.

[0053] A motor one 13 is fixed to the outer wall of the bottom of the support disk 2 through a motor frame 14. The output shaft of the motor one 13 is connected to the end of the main shaft 20 through a coupling.

[0054] When this device is in use, the motor to be tested can be fixed on the mounting bracket 10. Then, the main shaft 20 is driven to rotate by the first motor 13. The main shaft 20 drives the rotating frame 21 to rotate, thereby driving the connecting rod 22 to rotate. The third roller 27 rolls along the arc-shaped guide groove 12, so as to push the first roller 25 and the second roller 26 to roll through the first pushing frame 23 and the second pushing frame 24. Until the first roller 25 rolls to the junction of the straight guide groove 9 and the arc-shaped guide groove 12, it will roll into the straight guide groove 9 and then roll along the straight guide groove 9. Subsequently, the second roller 26 rolls into the straight guide groove 9, making the second pushing frame 24 parallel to the straight guide groove 9. At this time, the output shaft of the motor to be tested is coaxial with the hollow shaft 15. As the third roller 27 continues to roll, the first roller 25 and the second roller 26 are pushed forward together until the output shaft of the motor to be tested is inserted into the hollow shaft 15. The flat key 18 is limited to move outward by the output shaft of the motor to be tested through the inclined surface 19. During the above process, another mounting bracket 10 rotates from the test station to the loading and unloading station. Then, the motor to be tested is started. The motor to be tested starts to rotate until the output shaft rotates to a position where the keyway matches the flat key 18. The flat key 18 is clamped into the keyway by the pulling force of the first spring 16 to achieve transmission with the hollow shaft 15. At this time, a voltmeter and an ammeter can be arranged in the power supply circuit of the motor to be tested. The gear of the variable load 7 is continuously changed. During this process, the input and output parameters of the motor to be tested are detected by the torque sensor 5, the speed sensor 6, the voltmeter and the ammeter.

[0055] In this device, by setting two groups of fixing components 3, when one group is in the detection process, workers can disassemble and install the motor to be tested on the other group at the same time, so as to realize the time coordination of the process and improve the efficiency.

[0056] In addition, in this device, by setting the quick connector 4, it can be quickly connected to and disconnected from the output shaft of the motor to be tested. This process does not require manual or electric control, which increases the convenience of use. And by setting the straight guide groove 9, the arc-shaped guide groove 12 and the guiding component 11, it can ensure that the rotation station is switched while reducing the space occupation, and at the same time, the matching and disconnection process between the output shaft of the motor to be tested and the hollow shaft 15 has only linear motion, which increases the docking accuracy.

[0057] To solve the load problem; as Figure 5 shown, the variable load 7 includes a stator coil 31, a rotor core 32 and a housing 33. The rotor core 32 is rotatably connected to the inner wall of the housing 33 through an input shaft 28. The stator coil 31 is fixed to the inner wall of the housing 33, and the rotor core 32 and the stator coil 31 cooperate with each other. Multiple stator electrodes 30 are led out from different positions of the coil of the stator coil 31, and the stator electrodes 30 are fixed to the outer wall of the housing 33 through an insulating plate 29.

[0058] One end of the stator coil 31 is connected to an energy storage device. A protective shell 37 is fixed to the outer wall of the top of the support box 8 by bolts. A plurality of electrode arms 34 that cooperate with the stator electrodes 30 are rotatably connected to the inner side of the protective shell 37 through a connecting shaft 38. One end of the electrode arm 34 is connected to the inner wall of the protective shell 37 through a second spring 35. An electromagnet 36 is fixed to the other end of the electrode arm 34. Another electromagnet 36 that cooperates with the electromagnet 36 is fixed to the inner wall of the protective shell 37. And a plurality of the electrode arms 34 are connected to another terminal of the energy storage device.

[0059] In this embodiment, the energy storage device can use a battery pack for energy storage.

[0060] In this device, by setting the variable load 7 as a combination of the stator coil 31 and the rotor core 32, and then combining with the circuit design, different electrode arms 34 can be controlled to contact the stator electrodes 30, so as to control the number of turns of the stator coil 31 connected to the circuit, thereby using the number of turns to control the rotation damping of the rotor core 32 to achieve load regulation. At the same time, by setting the energy storage device, it can convert the damping into electric energy and recycle it again, so as to greatly reduce the energy consumption as a whole.

[0061] Since when the motor is actually working, the load cannot be completely consistent within one rotation period, especially for the motor used in stamping operations, the load fluctuates greatly within one rotation period, and for the motor that has not left the factory, the load fluctuation under the rated load is random. Therefore, in order to make the detection better match the actual working conditions, the load also needs to randomly fluctuate during the detection.

[0062] To solve the problem of random load fluctuation; as Figures 7 - 12 As shown in the figure, a ball storage cylinder 40 is fixed inside the support box 8. A blanking assembly 39 is arranged at the discharge port of the ball storage cylinder 40. A Galton board 41 is fixed to the bottom of the discharge port of the ball storage cylinder 40. A switch assembly 42 is arranged at the bottom of the Galton board 41. The ball storage cylinder 40 is loaded with balls that cooperate with the Galton board 41.

[0063] The blanking assembly 39 includes a second motor 43 and a blanking roller 44. The blanking roller 44 is rotatably connected to the discharge port of the ball storage cylinder 40. A material storage groove 45 for storing one ball is formed on the side wall of the blanking roller 44. The second motor 43 is fixed to the side wall of the ball storage cylinder 40 by bolts, and the output shaft of the second motor 43 is fixed to the end of the blanking roller 44.

[0064] The switch assembly 42 includes a first switch housing 46 and a second switch housing 49 that are fixedly connected to each other. A plurality of ball-drop channels 50 that correspond to the ball outlets of the Galton board 41 and are open on one side are provided on the inner wall of the second switch housing 49. A pressing plate 51 is provided on the inner wall of the ball-drop channel 50. The pressing plate 51 is slidably connected to the first switch housing 46 through the switch assembly 42. A fourth spring 48 is buckled to the outer walls of the opposite sides of the Galton board 41 and the first switch housing 46. A carriage 55 is horizontally slidably connected to the inner wall of the first switch housing 46. The carriage 55 is connected to the inner wall of the first switch housing 46 through a third spring 47. A slope 53 and a flat surface 54 that cooperate with the latch rod 52 are provided on the inner wall of the carriage 55.

[0065] A first electrode piece 56 is fixed to the bottom of the pressing plate 51. A second electrode piece 57 that cooperates with the first electrode piece 56 is fixed to the top of the first switch housing 46. A set of the first electrode piece 56 and the second electrode piece 57 are connected in series to the power supply circuit of a set of electromagnets 36.

[0066] When the second motor 43 is started, it can drive the blanking roller 44 to rotate, so that the balls in the ball storage cylinder 40 can be individually conveyed. The balls enter from the top of the Galton board 41, and then after passing through the Galton board 41, they leak out from one of the ball outlets of the Galton board 41 and enter the ball-drop channel 50, and then hit the pressing plate 51, causing the pressing plate 51 to descend. The pressing plate 51 drives the latch rod 52 to descend. The latch rod 52 first cooperates with the slope 53, causing the carriage 55 to move horizontally. When moving to the maximum position horizontally, the other latch rods 52 rebound after leaving the flat surface 54, and the latch rod 52 continues to descend, causing the latch rod 52 to be buckled to the flat surface 54. The first electrode piece 56 contacts the second electrode piece 57, and one set of electromagnets 36 is turned on. One of the electrode arms 34 rotates to contact the stator electrode 30. At this time, it is a load condition.

[0067] Specifically, since the balls enter from the top of the Galton board 41 and are discharged from the ball outlets of the Galton board 41 randomly, and from the middle to both sides, the ball outlet probabilities of each ball outlet follow a normal distribution. Therefore, specifically, the number of electrode arms 34 and stator electrodes 30, the number of ball outlets of the Galton board 41, and the number of sets of the first electrode piece 56 and the second electrode piece 57 are the same, and their linear arrangement connection methods are also the same, that is, they are all numbered from 1 to n, and the first electrode piece 56 and the second electrode piece 57 with the same number are connected to the electromagnets 36 with the same number.

[0068] In this device, on the basis of the adjustable variable load 7, by using the Galton board 41, a completely true random load fluctuation is realized. And on the basis of randomness, it also follows a normal distribution. The high-probability ball outlets correspond to medium loads, that is, the rated load of the motor to be tested, and the low-probability interval is the fluctuating load, so that it can better fit the actual working conditions and increase the rationality of the detection.

[0069] When this embodiment is in use, the motor to be tested can be fixed on the mounting frame 10, and then the main shaft 20 is driven to rotate by the first motor 13. The main shaft 20 drives the rotary frame 21 to rotate, thereby driving the connecting rod 22 to rotate. The third roller 27 rolls along the arc-shaped guide groove 12, so as to push the first roller 25 and the second roller 26 to roll through the first pushing frame 23 and the second pushing frame 24. Until the first roller 25 rolls to the junction of the linear guide groove 9 and the arc-shaped guide groove 12, it will roll into the linear guide groove 9 and then roll along the linear guide groove 9. Subsequently, the second roller 26 rolls into the linear guide groove 9, making the second pushing frame 24 parallel to the linear guide groove 9. At this time, the output shaft of the motor to be tested is coaxial with the hollow shaft 15. As the third roller 27 continues to roll, the first roller 25 and the second roller 26 are pushed forward together until the output shaft of the motor to be tested is inserted into the hollow shaft 15. The flat key 18 is limited and moves outward by the output shaft of the motor to be tested through the inclined surface 19. During the above process, another mounting frame 10 rotates from the test station to the loading and unloading station. Then, the motor to be tested is started. The motor to be tested starts to rotate until the output shaft rotates to a position where the keyway matches the flat key 18. The flat key 18 is clamped into the keyway under the pulling force of the first spring 16 to achieve transmission with the hollow shaft 15. At this time, a voltmeter and an ammeter can be arranged in the power supply circuit of the motor to be tested, and the gear of the variable load 7 is continuously changed. During this process, the input and output parameters of the motor to be tested are detected by the torque sensor 5, the speed sensor 6, the voltmeter and the ammeter. Since when the motor is actually working, the load cannot be completely consistent within one rotation period, especially for the motor used in stamping operations, the load fluctuates greatly within one rotation period, and for the motors that have not left the factory, the load fluctuation under the rated load is random. Therefore, in order to make the detection better fit the actual working conditions, it is also necessary to randomly fluctuate the load during the detection. So when the second motor 43 is started, it can drive the blanking roller 44 to rotate, so as to convey the balls in the ball storage cylinder 40 one by one. The balls enter from the top of the Galton board 41, and then after passing through the Galton board 41, they leak out from one of the ball outlets of the Galton board 41 and enter the falling ball channel 50, and then hit the pressing plate 51, causing the pressing plate 51 to descend. The pressing plate 51 drives the buckling rod 52 to descend. The slope surface 53 first cooperates with the slope surface 53, causing the sliding frame 55 to move horizontally. When moving horizontally to the maximum position, the other buckling rods 52 rebound after separating from the plane 54, and the buckling rod 52 continues to descend so that the buckling rod 52 is buckled to the plane 54. The first electrode plate 56 contacts the second electrode plate 57, and one group of electromagnets 36 is turned on. One of the electrode arms 34 rotates and contacts the stator electrode 30. At this time, it is a load condition.

[0070] Embodiment 2:

[0071] A method for detecting the load performance of a motor, as Figures 1 - 12 shown, which includes the following steps:

[0072] S1: Load the motor to be tested on the mounting bracket 10, then start the first motor 13 to convey the mounting bracket 10 to the detection station. Meanwhile, disassemble the motor to be tested on the detected mounting bracket 10 and load the remaining motors to be tested.

[0073] S2: Set the detection time period, and use the timing method to control the start period of the blanking component 39 according to the detection time period to conduct fluctuating load detection.

[0074] S3: During the fluctuating load detection, collect electrical parameters through the ammeter, voltmeter, torque sensor 5 and speed sensor 6 to achieve detection.

[0075] As mentioned above, it is only the preferred specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent replacements or changes, and should be covered within the protection scope of the present invention.

Claims

1. A motor load performance detection device, comprising a load detection unit and a work station switching unit, characterized in that the work station switching unit includes a support disk (2) supported on the ground by support legs (1) and two groups of fixed components (3) arranged on the top of the support disk (2), the load detection unit includes a variable load (7) supported on the ground by a support box (8) and a quick connector (4) for mating with the input of the motor to be tested, and a torque sensor (5) and a rotational speed sensor (6) are arranged between the quick connector (4) and the input end of the variable load (7); a linear guide groove (9) and an arc guide groove (12) are formed on the upper surface of the support disk (2); the fixed component (3) includes a mounting bracket (10) for mounting the motor to be tested and a guiding component (11) movably and limit-fitted in the linear guide groove (9) and the arc guide groove (12), the guiding component (11) includes a first roller (25), a second roller (26), and a third roller (27) that are rollingly fitted on the inner walls of the linear guide groove (9) and the arc guide groove (12), the same push frame two (24) is rotatably connected to the tops of the first roller (25) and the second roller (26), the same push frame one (23) is rotatably connected to the tops of the second roller (26) and the third roller (27), a connecting rod (22) is further rotatably connected to the top of the third roller (27), the other end of the connecting rod (22) is fixedly connected to the same rotating frame (21), and the rotating frame (21) is rotatably connected to the support disk (2) through a main shaft (20); the mounting bracket (10) is fixed to the outer wall of the top of the push frame two (24); the quick connector (4) includes a hollow shaft (15) and a flat key (18) that is keyway-fitted with the output shaft of the motor to be tested, the flat key (18) is slidably connected to the radial direction of the hollow shaft (15), and a bevel surface (19) is arranged on one side of the flat key (18), an end plate (17) is fixed to the other side of the flat key (18), and the end plate (17) is connected to the outer wall of the hollow shaft (15) through a first spring (16); a first motor (13) is fixed to the outer wall of the bottom of the support disk (2) through a motor bracket (14), and the output shaft of the first motor (13) is connected to the end of the main shaft (20) through a coupling; 2. The motor load performance detection device according to claim 1, wherein the variable load (7) includes a stator coil (31), a rotor core (32), and a housing (33), the rotor core (32) is rotatably connected to the inner wall of the housing (33) through an input shaft (28), the stator coil (31) is fixed to the inner wall of the housing (33), and the rotor core (32) and the stator coil (31) cooperate with each other; 3. The motor load performance detection device according to claim 2, wherein, a plurality of stator electrodes (30) are led out from different positions of the coil of the stator coil (31), and the stator electrodes (30) are fixed to the outer wall of the housing (33) through an insulating plate (29).

4. An electric motor load performance detection device according to claim 3, characterized in that, One end of the stator coil (31) is connected to an energy storage device. A protective case (37) is fixed to the outer wall of the top of the support box (8) by bolts. A plurality of electrode arms (34) that cooperate with the stator electrodes (30) are rotatably connected to the inside of the protective case (37) through a connecting shaft (38). One end of the electrode arm (34) is connected to the inner wall of the protective case (37) through a second spring (35). An electromagnet (36) is fixed to the other end of the electrode arm (34). Another electromagnet (36) that cooperates with the electromagnet (36) is fixed to the inner wall of the protective case (37).

5. An electric machine load performance detection device according to claim 4, wherein A plurality of the electrode arms (34) are connected to another terminal of the energy storage device.

6. The motor load performance detection device according to claim 1, characterized in that, A ball storage cylinder (40) is fixed inside the support box (8). A blanking assembly (39) is arranged at the discharge port of the ball storage cylinder (40). A Galton board (41) is fixed to the bottom of the discharge port of the ball storage cylinder (40). A switch assembly (42) is arranged at the bottom of the Galton board (41). Balls that cooperate with the Galton board (41) are loaded inside the ball storage cylinder (40).

7. An electric motor load performance detection device according to claim 6, characterized in that, The blanking assembly (39) includes a second motor (43) and a blanking roller (44). The blanking roller (44) is rotatably connected to the discharge port of the ball storage cylinder (40). A material storage groove (45) for storing one ball is formed in the side wall of the blanking roller (44). The second motor (43) is fixed to the side wall of the ball storage cylinder (40) by bolts, and the output shaft of the second motor (43) is fixed to the end of the blanking roller (44).

8. An electric machine load performance detection device according to claim 7, characterized in that, The switch assembly (42) includes a first switch housing (46) and a second switch housing (49) that are fixed to each other. A plurality of ball dropping channels (50) that correspond to the ball outlets of the Galton board (41) and are open on one side are formed in the inner wall of the second switch housing (49). A pressing plate (51) is arranged on the inner wall of the ball dropping channel (50). The pressing plate (51) is slidably connected to the first switch housing (46) through the switch assembly (42). A fourth spring (48) is buckled to the outer walls of the opposite sides of the Galton board (41) and the first switch housing (46). A sliding frame (55) is horizontally slidably connected to the inner wall of the first switch housing (46). The sliding frame (55) is connected to the inner wall of the first switch housing (46) through a third spring (47).

9. An electric machine load performance detection device according to claim 8, characterized in that, A slope surface (53) and a flat surface (54) that cooperate with a buckle rod (52) are formed in the inner wall of the sliding frame (55). An electrode plate one (56) is fixed to the bottom of the pressing plate (51). An electrode plate two (57) that cooperates with the electrode plate one (56) is fixed to the top of the first switch housing (46). A set of the electrode plate one (56) and the electrode plate two (57) are connected in series to the power supply circuit of a set of electromagnets (36); When the second motor (43) starts, it can drive the blanking roller (44) to rotate, so that the balls in the ball storage cylinder (40) can be conveyed individually. The balls enter from the top of the Galton board (41), and then after passing through the Galton board (41), they leak out from one of the ball outlets of the Galton board (41) and enter the ball dropping channel (50), and then hit the pressing plate (51), causing the pressing plate (51) to descend. The pressing plate (51) drives the buckle rod (52) to descend. The buckle rod (52) first cooperates with the slope surface (53) to make the carriage (55) move horizontally. When moving horizontally to the maximum position, the other buckle rods (52) rebound after separating from the plane (54), and the buckle rod (52) continues to descend so that the buckle rod (52) is buckled to the plane (54). The first electrode plate (56) contacts the second electrode plate (57), and one group of electromagnets (36) is turned on. One of the electrode arms (34) rotates and contacts the stator electrode (30). At this time, it is a load condition.

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