Electromagnetic clutch reliability test device

Abstract

The invention discloses an electromagnetic clutch reliability test device, which overcomes the problem that the actual working conditions cannot be simulated at present. The device comprises an electromagnetic clutch test system, a loading system, a detection system and a control system; the electromagnetic clutch test system is installed in a closed box body at the upper left end of a temperature and humidity test box of the loading system, the left end of the electromagnetic clutch test system adopts a box hole bearing assembly to be installed in a through hole on the left box wall of the temperature and humidity test box and protrudes out of the left box wall, and the protruding end is connected with a magnetic powder dynamometer of a magnetic powder dynamometer assembly in the loading system; the bottom end of the electromagnetic clutch test system is bolted to a vibration table panel at the top of a vibration loading table of the loading system below through a simulation workbench therein, an operating table of the control system and an adjustable power supply box are placed on the right side of the temperature and humidity test box, a digital display voltmeter of the detection system is placed on the top of the operating table, other parts of the detection system are installed in the temperature and humidity test box, and the detection system is connected with a data acquisition card line in the operating table.

Description

Technical Field

[0001] The invention relates to a test device belonging to the technical field of clutch detection and testing, and more specifically, to a reliability test device for an electromagnetic clutch. Background Art

[0002] Electromagnetic clutch refers to a friction clutch that generates clamping force by electromagnetic force. It is one of the main actuators for realizing automatic control of equipment. It uses electromagnetic energy to transfer torque from the active end to the passive end to realize transmission switching and output. The electromagnetic clutch can control the working conversion of the transmission system while the input shaft keeps rotating, such as the start, stop, reversal and speed regulation state conversion of the machine tool's spindle. Because the electromagnetic clutch has the characteristics of small size, compact structure, fast response, remote control and low control energy, it is easy to realize machine tool automation and has also been widely used in modern industry.

[0003] Taking automobiles as an example, electromagnetic clutches are currently used in automobile hub motors, automobile air-conditioning compressors, and new energy vehicle clutches. As a key component for transmitting torque, electromagnetic clutches are often affected by the temperature, humidity, vibration, and external loads of the operating environment, causing failures in actual applications. The reliability test of the electromagnetic clutch can provide key data for electromagnetic clutch failure analysis, product structure optimization, and improving product reliability. Therefore, it is of great significance to research and develop electromagnetic clutch reliability test equipment and test methods;

[0004] At present, there are few tests on the reliability of electromagnetic clutch in China. The only ones are reliability tests conducted without loading or only loading torque. They do not have the function of simulated loading and lack the detection of reliability test of electromagnetic clutch under simulated working conditions. Therefore, an electromagnetic clutch reliability test device with simulated actual working condition loading is developed, and a complete electromagnetic clutch reliability test method is proposed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the problem that the current domestic electromagnetic clutch reliability test device and reliability test method cannot simulate actual working conditions, and provide a reliability test device that can perform temperature loading, humidity loading, vibration loading, torque loading and power supply voltage changes on the electromagnetic clutch.

[0006] In order to solve the above technical problems, the present invention is implemented by adopting the following technical solutions:

[0007] The electromagnetic clutch reliability test device comprises an electromagnetic clutch test system, a loading system, a detection system and a control system;

[0008] The electromagnetic clutch test system comprises a simulation workbench;

[0009] The loading system includes a vibration loading platform, a temperature and humidity test chamber and a magnetic powder dynamometer assembly;

[0010] The control system includes an adjustable power supply box and an operating table;

[0011] The temperature and humidity test chamber is installed on the foundation, the electromagnetic clutch test system is installed in the closed box at the upper left end of the temperature and humidity test chamber, the left end of the electromagnetic clutch test system is installed in the through hole on the left wall of the temperature and humidity test chamber using a box hole bearing assembly and extends out of the left wall, the vibration loading table is installed on the bed base at the lower left end of the temperature and humidity test chamber, the regular octagonal plate on the top of the vibration table panel is bolted to the bottom end of the simulation workbench, the bottom end of the cylinder at the bottom of the vibration table panel is threadedly connected to the vibration output shaft of the vibration loading table, and the left end of the electromagnetic clutch test system is keyed to the input shaft of the magnetic powder dynamometer in the magnetic powder dynamometer assembly installed on the left side of the temperature and humidity test chamber through a No. 1 coupling;

[0012] The operating table is placed on the right side of the temperature and humidity test box, the adjustable power box is placed on the top of the operating table, one end of the adjustable power box is connected to the programmable controller in the operating table, and the other end is connected to the electromagnetic clutch being tested; the digital display voltmeter in the detection system is placed on the top of the operating table, the displacement sensor assembly, the temperature sensor assembly, the torque sensor assembly and the vibration sensor are installed in the temperature and humidity test box, and the detection system and the data acquisition card in the operating table are connected by wire.

[0013] The electromagnetic clutch test system described in the technical solution also includes shaft 1, coupling No. 2, bearing support, shaft 2, coupling No. 3, torque sensor, coupling No. 4, servo motor, L-shaped motor bracket and 8 sets of T-bolts with the same structure; the right end of coupling No. 1 is connected to the left end of shaft 1 installed in the housing hole bearing assembly through a flat key, the right end of shaft 1 is connected to the left end of coupling No. 2 through a flat key, the right end of coupling No. 2 is connected to the left end of shaft 2 through a flat key, the right end of shaft 2 installed in the bearing support is connected to the left end of coupling No. 3 through a flat key, the right end of coupling No. 3 is connected to the left end of the torque sensor through a flat key, the right end of the torque sensor is connected to the left end of coupling No. 4 through a flat key, and the right end of coupling No. 4 is connected to the output shaft of the servo motor installed on the L-shaped motor bracket through a flat key; the bearing support, torque sensor and L-shaped motor bracket are installed on the top of the simulation workbench from left to right using T-bolts through the through holes at their bottom ends.

[0014] The housing hole bearing assembly described in the technical scheme includes a No. 3 end cover, two No. 2 felt rings of the same structure, a No. 2 cylindrical roller bearing, a No. 2 bearing seat, a No. 4 end cover, a No. 1 sleeve and a No. 2 sleeve; the No. 2 bearing seat is installed in the large diameter hole of the stepped through hole on the left wall of the temperature and humidity test box, the No. 2 cylindrical roller bearing is placed in the small diameter hole in the center stepped hole of the No. 2 bearing seat 45, the No. 1 sleeve is located on the left side of the No. 2 cylindrical roller bearing, the No. 2 sleeve is located on the right side of the No. 2 cylindrical roller bearing, the left end face of the No. 2 cylindrical roller bearing inner ring is in contact with the right end face of the No. 1 sleeve, the left end face of the No. 1 sleeve is in contact with the shoulder of the shaft, the right end face of the No. 2 cylindrical roller bearing inner ring is in contact with the left end face of the No. 2 sleeve, the right end face of the No. 2 sleeve is in contact with the left end face of the locking nut, the No. 1 sleeve, the No. 2 cylindrical roller bearing, and the No. 2 sleeve It is mounted on shaft one; end cover No. 3 is fixed to the large diameter hole on bearing seat No. 2 by using 4 hexagon socket screws and through 4 countersunk screw holes thereon, and at the same time, the left end face of the cylindrical boss at the center of the left end face of end cover No. 3 is in contact with the right end face of the outer ring of cylindrical roller bearing No. 2; end cover No. 4 is fixed to the outer box wall of the left box wall of the temperature and humidity test box by using 4 hexagon socket screws and through 4 countersunk screw holes thereon, and at the same time, the cylindrical boss at the center of the right end face of end cover No. 4 is installed in the small diameter hole of the two-stage center stepped hole of bearing seat No. 2, and the right end face of the cylindrical boss on end cover No. 4 is in contact with the left end face of the outer ring of cylindrical roller bearing No. 2; two No. 2 felt rings with the same structure are respectively installed in the sealing grooves on end cover No. 4 and end cover No. 3, and the inner hole surfaces of the two No. 2 felt rings with the same structure are in contact with the outer cylindrical surfaces of sleeve No. 1 and sleeve No. 2.

[0015] The bearing support described in the technical solution includes a No. 1 bearing seat, a No. 1 end cover, two No. 1 felt rings with the same structure, a No. 3 sleeve, a No. 4 sleeve, a No. 2 end cover and a No. 1 cylindrical roller bearing; the No. 1 end cover is installed in the right end hole of the annular body at the upper end of the No. 1 bearing seat, and then the No. 1 end cover is fixed by 4 hexagon socket bolts, and the No. 2 end cover is installed in the left end hole of the annular body, and then the No. 2 end cover is fixed by 4 hexagon socket bolts; the No. 1 cylindrical roller bearing is installed in the middle hole of the annular body, the left end face of the inner ring of the No. 1 cylindrical roller bearing is in contact with the right end face of the No. 3 sleeve, and the right end face of the inner ring of the No. 1 cylindrical roller bearing is in contact with the No. 4 sleeve. The left end face of the sleeve is in contact connection; the right cylindrical boss at the center of the right end face of the No. 2 end cover is installed into the left end of the middle hole of the annular body, and the right end face of the right cylindrical boss is in contact connection with the left end face of the outer ring of the No. 1 cylindrical roller bearing; the left cylindrical boss at the center of the left end face of the No. 1 end cover is installed into the right end of the middle hole of the annular body, and the left end face of the left cylindrical boss is in contact connection with the right end face of the outer ring of the No. 1 cylindrical roller bearing; two No. 1 felt rings with the same structure are respectively installed in the sealing ring grooves on the No. 2 end cover and the No. 1 end cover, and the inner hole surfaces of the two No. 1 felt rings with the same structure are in contact connection with the outer cylindrical surfaces of the No. 3 and No. 4 sleeves.

[0016] The magnetic powder dynamometer assembly described in the technical solution also includes a magnetic powder dynamometer fixing seat, a magnetic powder dynamometer support, a magnetic powder dynamometer controller and a dynamometer mounting stand;

[0017] The magnetic powder dynamometer adopts a GZF20 magnetic powder dynamometer, which is mounted on the upper end of a magnetic powder dynamometer support, and the two are rotatably connected, the rotation axis of the magnetic powder dynamometer is colinear with the rotation axis of the electromagnetic clutch test system, the magnetic powder dynamometer support is bolted to the magnetic powder dynamometer fixing seat, and the magnetic powder dynamometer fixing seat is mounted on the dynamometer workbench at the top of the dynamometer mounting stand by T-bolts;

[0018] The magnetic powder dynamometer controller is integrated and installed inside the magnetic powder dynamometer. One end of the magnetic powder dynamometer controller is connected to the magnetic powder dynamometer through an electrical line, and the other end is connected to the J5.3 interface of the programmable controller in the operating console through an electrical line.

[0019] The other components in the detection system described in the technical solution are installed in the temperature and humidity test chamber: the other components in the detection system refer to the displacement sensor assembly, the temperature sensor assembly, the torque sensor assembly and the vibration sensor; wherein, the displacement sensor assembly includes a displacement sensor and a displacement sensor fixing seat, the temperature sensor assembly includes a temperature sensor and a temperature sensor fixing frame, and the torque sensor assembly includes a torque sensor and a torque sensor support seat; the displacement sensor is installed on the inner side of the left wall of the temperature and humidity test chamber using a displacement sensor fixing seat, the temperature sensor is installed on the upper part of the temperature sensor fixing frame, the temperature sensor fixing frame is fixed to the simulation workbench through its bottom end and with T-bolts, the torque sensor is installed on the simulation workbench through the torque sensor support seat and with T-bolts, and the vibration sensor is installed on the top of the bearing support using a threaded connection.

[0020] The detection system described in the technical solution and the data acquisition card line connection in the operating table refer to: the detection system also includes a displacement sensor, a temperature sensor, a torque sensor and a vibration sensor; the displacement sensor adopts a displacement sensor of model LJ-V7080, and the displacement sensor is connected to the acquisition interface line of the analog signal channel 4 of the data acquisition card in the operating table; the temperature sensor adopts an infrared thermometer of model YTDZAS, and the temperature measurement range is -30℃~500℃, and the temperature sensor is connected to the acquisition interface line of the analog signal channel 5 of the data acquisition card; the torque sensor adopts a speed sensor of model ZJ-20A, and the torque sensor is connected to the acquisition interface line of the analog signal channel 3 of the data acquisition card; the vibration sensor adopts a vibration sensor of model VB-451SCB, and the vibration sensor is connected to the acquisition interface line of the analog signal channel 2 of the data acquisition card; the digital display voltmeter is connected to the acquisition interface line of the analog signal channel 1 of the data acquisition card.

[0021] The operating table described in the technical solution includes a box, a system running light, a system running button, a system stop light, a system stop button, a keyboard and mouse, a display, a loading and running button, a loading and stopping button, a reset button, an emergency stop button, a computer, a data acquisition card, a programmable controller (with a multi-core plug; the keyboard and mouse are installed on the upper end surface of the extended part of the box, and its electrical wires are connected to the USB interface of the computer. The display adopts a liquid crystal display of model 275S1E, and the display is installed on the inclined surface of the upper part of the box. The display is connected to the display interface of the computer through an HDMI cable; the data acquisition card adopts a data acquisition card of model PCI-1255, and the data acquisition card is installed in the mainboard card slot of the computer; the programmable controller A programmable controller of the American brand Delta PMAC-Lite is used, and the programmable controller is installed inside the computer; a multi-core plug adopts a small multi-core plug of the Misumi brand Dsub series, and a 12-core multi-core plug is selected and installed inside the computer; the J4 interface of the programmable controller is connected to the 1394 interface of the computer motherboard; the J5.1 interface of the programmable controller is connected to the vibration loading table controller built into the vibration loading table, the J5.2 interface of the programmable controller is connected to the temperature and humidity test chamber controller built into the temperature and humidity test chamber, the J5.3 interface of the programmable controller is connected to the magnetic powder dynamometer controller built into the magnetic powder dynamometer, and the J5.4 interface of the programmable controller is connected to the built-in encoder of the servo motor;

[0022] One end of the electrical wire of the multi-core plug is connected to the J5 interface of the programmable controller, and the other end of the electrical wire is connected to each input end of the multi-core plug as an input device, and each input end of the multi-core plug is connected to each switch button:

[0023] The input terminal I0.0 interface of the multi-core plug is connected to the 1 interface of the system operation button by an electrical wire;

[0024] The input terminal I0.1 interface of the multi-core plug is connected to the 1 interface of the system stop button by an electrical wire;

[0025] The input terminal I0.2 interface of the multi-core plug is connected to the 1 interface of the load operation button by an electrical wire;

[0026] The input terminal I0.3 interface of the multi-core plug is connected to the 1 interface of the loading stop button by an electrical wire;

[0027] The input port I0.4 of the multi-core plug is connected to the port 1 of the reset button by an electrical wire.

[0028] The input terminal I0.5 interface of the multi-core plug is connected to the 1 interface of the emergency stop button by an electrical wire;

[0029] The output port O2.0 of the multi-core plug is connected to the X1 port of the system operation light by an electrical wire.

[0030] The output end O2.1 interface of the multi-core plug is connected to the X1 interface of the system stop light by an electrical wire.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. The electromagnetic clutch reliability test device of the present invention is arranged in a temperature and humidity test chamber. The temperature, humidity, vibration, torque of the electromagnetic clutch working environment and the change of the power supply voltage when the electromagnetic clutch is working can be simulated through the temperature and humidity test chamber, the vibration loading platform, the magnetic powder dynamometer and the adjustable power supply. The reliability test of the electromagnetic clutch simulating the actual working condition is carried out to stimulate the potential failure of the electromagnetic clutch under test and comprehensively evaluate the reliability level of the electromagnetic clutch.

[0033] 2. The electromagnetic clutch reliability test device described in the present invention is suitable for electromagnetic clutches of different models, and has universality and flexibility; the loading device can be adjusted according to the test requirements, including adjusting the test temperature and temperature change rate, humidity and humidity change rate of the temperature and humidity test box to simulate the temperature and humidity in various actual working environments; adjusting the vibration frequency and amplitude of the vibration loading platform to simulate different vibration types; adjusting the excitation current of the magnetic powder dynamometer to simulate different torque loads; adjusting the voltage value and disturbance value of the power supply to simulate the change of the power supply voltage of the electromagnetic clutch during operation;

[0034] 3. The electromagnetic clutch reliability test device of the present invention has an automatic control system, which can automatically record the armature stroke, friction plate temperature and working voltage of the electromagnetic clutch under program control, and automatically record failure data when the armature stroke increases, the temperature rise is too high or a fault occurs, and automatically calculate the reliability function and the mean trouble-free working time of the feed system;

[0035] 4. The electromagnetic clutch reliability test method described in the present invention is a complete set of electromagnetic clutch reliability test methods. First, the electromagnetic clutch to be tested is installed on the electromagnetic clutch reliability test device. Then, according to the actual working environment that needs to be simulated by the electromagnetic clutch to be tested, temperature and humidity simulation loading test, vibration loading test, torque loading test, and electromagnetic clutch power supply voltage change impact test on the electromagnetic clutch reliability can be carried out respectively. The control of a single variable can be realized; a multi-factor comprehensive impact test can also be realized, which makes the electromagnetic clutch reliability test more complete and improves the credibility of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described below in conjunction with the accompanying drawings:

[0037] Figure 1 It is a front view of the structure of the electromagnetic clutch test system in the electromagnetic clutch reliability test device of the present invention;

[0038] Figure 2 It is a front view of the structure of the electromagnetic clutch reliability test device of the present invention;

[0039] Figure 3 It is a cross-sectional view of the main view of the structural composition of the housing hole bearing component in the electromagnetic clutch reliability test device of the present invention;

[0040] Figure 4 It is a cross-sectional view of the structural composition of the bearing support component in the electromagnetic clutch reliability test device of the present invention;

[0041] Figure 5 It is an axonometric projection view of the displacement sensor component, temperature sensor and torque sensor structure of the detection system in the electromagnetic clutch reliability test device of the present invention;

[0042] Figure 6 It is an axonometric projection view of the operating table component in the electromagnetic clutch reliability test device of the present invention;

[0043] Figure 7 It is an axonometric projection view of the structure of the vibration loading platform in the electromagnetic clutch reliability test device of the present invention;

[0044] Figure 8It is a structural principle diagram of the control system in the electromagnetic clutch reliability test device of the present invention;

[0045] Fig. 9 It is a flowchart of the electromagnetic clutch reliability test method of the present invention;

[0046] In the figure: 1. Vibration loading table, 2. Temperature and humidity test chamber, 3. Support beam, 4. Ground feet, 5. Support legs, 6. Dynamometer workbench, 7. Magnetic powder dynamometer fixing seat, 8. Magnetic powder dynamometer, 9. No. 1 coupling, 10. Electromagnetic clutch test system, 11. Temperature and humidity test chamber interface, 12. Adjustable power box, 13. Digital voltmeter, 14. Operating table, 15. Temperature and humidity test chamber control panel, 16. Magnetic powder dynamometer base, 17. Torque sensor support seat, 18. Box body hole shaft Bearing assembly, 19. Axis 1, 20. No. 2 coupling, 21. Electromagnetic clutch, 22. Vibration sensor, 23. Bearing support, 24. Axis 2, 25. No. 3 coupling, 26. Torque sensor, 27. No. 4 coupling, 28. Servo motor, 29. Simulation workbench, 30. L-type motor bracket, 31. T-bolt, 32. Vibration table panel, 33. Temperature sensor assembly, 34. Displacement sensor assembly, 35. Bed base, 36. No. 1 bearing seat, 37. No. 1 end cover, No. 38.1 felt ring, No. 391.3 sleeve, No. 392.4 sleeve, No. 40.2 end cover, No. 41.1 cylindrical roller bearing, No. 42.3 end cover, No. 43.2 felt ring, No. 44.2 cylindrical roller bearing, No. 45.2 bearing seat, No. 46.4 end cover, No. 471.1 sleeve, No. 472.2 sleeve, 48. displacement sensor fixing seat, 49. displacement sensor, 50. temperature sensor, 51. temperature sensor fixing bracket, 52. system operation light, 53. system Run button, 54. System stop light, 55. System stop button, 56. Mouse and keyboard, 57. Display, 58. Load and run button, 59. Load and stop button, 60. Reset button, 61. Emergency stop button, 62. Computer, 63. Data acquisition card, 64. Programmable controller, 65. Built-in encoder, 66. Data processing program, 67. Multi-core plug, 68. Vibration loading table controller, 69. Temperature and humidity test chamber controller, 70. Magnetic powder dynamometer controller. DETAILED DESCRIPTION

[0047] The present invention is described in detail below in conjunction with the accompanying drawings:

[0048] The present invention simulates different working conditions and different load environments of the electromagnetic clutch in the actual working process, and performs reliability tests on the electromagnetic clutch under these environments, designs an electromagnetic clutch reliability test device, and proposes a complete set of electromagnetic clutch reliability test methods;

[0049] The electromagnetic clutch reliability test device and test method described in the present invention mainly consist of two parts, namely, the electromagnetic clutch reliability test device part and the electromagnetic clutch reliability test method part.

[0050] 1. Electromagnetic clutch reliability test device

[0051] See also Figure 1 and Figure 2 The electromagnetic clutch reliability test device of the present invention includes an electromagnetic clutch test system, a loading system, a detection system and a control system.

[0052] 1. Electromagnetic clutch test system

[0053] See also Figure 1 and Figure 2 The electromagnetic clutch test system 10 includes a No. 1 coupling 9, a housing hole bearing assembly 18, a shaft 19, a No. 2 coupling 20, a bearing support 23, a shaft 24, a No. 3 coupling 25, a No. 4 coupling 27, a servo motor 28, a simulation workbench 29, an L-shaped motor bracket 30 and 8 sets of T-bolts 31 with the same structure for fixing;

[0054] The coupling No. 1 9, coupling No. 20, coupling No. 3 25, and coupling No. 4 27 are all elastic couplings. The present invention adopts the plum blossom-shaped elastic coupling of VMTT brand (wherein, the series number of coupling No. 1 9 and coupling No. 4 27 is VSMC-04; the series number of coupling No. 20 and coupling No. 3 25 is VSM-04). The plum blossom-shaped elastic coupling has a simple structure and a large torque transmission range. Coupling No. 1 9 and coupling No. 4 27 have good transmission synchronization and are specially used in precision occasions such as servo motors. Coupling No. 20 and coupling No. 3 25 have good buffering performance and are easy to disassemble. Keyways are provided at both ends of the elastic coupling. The inner hole shaft diameters of the coupling No. 1 9, coupling No. 20, coupling No. 3 25, and coupling No. 4 27 are different.

[0055] The left end of the No. 1 coupling 9 is connected to the input shaft of the magnetic powder dynamometer 8 through a flat key, the right end of the No. 1 coupling 9 is connected to the left end of the shaft 19 through a flat key, the right end of the shaft 19 is connected to the left end of the No. 2 coupling 20 through a flat key, and the right end of the No. 2 coupling 20 is connected to the left end of the shaft 2 24 through a flat key, wherein the shaft 24 is installed in the bearing support 23, the right end of the shaft 24 is connected to the left end of the No. 3 coupling 25 through a flat key, the right end of the No. 3 coupling 25 is connected to the left end of the torque sensor 26 through a flat key, the right end of the torque sensor 26 is connected to the left end of the No. 4 coupling 27 through a flat key, and the right end of the No. 4 coupling 27 is connected to the output shaft of the servo motor 28 through a flat key, wherein the servo motor 28 is installed on the L-shaped motor bracket 30; the bearing support 23, the torque sensor 26 and the L-shaped motor bracket 30 are installed on the top of the simulation workbench 29 through the long strip through hole at the bottom and the T-bolt 31.

[0056] See also Figure 3 The housing hole bearing assembly 18 includes a No. 3 end cover 42, two No. 2 felt rings 43 of the same structure, a No. 2 cylindrical roller bearing 44, a No. 2 bearing seat 45, a No. 4 end cover 46, a No. 1 shaft sleeve 471 and a No. 2 shaft sleeve 472; the housing hole bearing assembly 18 is used to support the shaft 19, and the shaft 19 is inserted into the temperature and humidity test box 2 through the housing hole bearing assembly 18; the left side box wall of the temperature and humidity test box 2 is provided with a through hole and four threaded holes evenly distributed around the through hole for fixing the housing hole bearing assembly 18, and the housing hole bearing assembly 18 is installed on a through hole;

[0057] The No. 3 end cover 42 is a disc-shaped structural member, and a cylindrical boss is arranged at the center of the left end face of the No. 3 end cover 42. The diameter of the cylindrical boss is equal to the diameter of the small diameter hole of the two-stage center stepped hole of the No. 2 bearing seat 45, and the two are connected by a sliding fit. A two-stage stepped through hole is arranged at the center of the No. 3 end cover 42, and a ring-shaped sealing groove with an isosceles trapezoidal cross section is arranged on the inner wall of the small diameter hole. The size of the groove is processed according to the felt ring groove size matching the No. 2 felt ring 43 under the standard JB / ZQ4606-1997. A No. 2 felt ring 43 is installed in this sealing groove. The diameter of the small diameter hole is larger than the outer diameter of the No. 2 shaft sleeve 472, and the diameter of the large diameter hole is larger than the inner diameter of the outer bearing ring of the No. 2 cylindrical roller bearing 44, and smaller than the outer diameter of the outer bearing ring of the No. 2 cylindrical roller bearing 44. Four countersunk screw holes with the same structure are evenly arranged around the No. 3 end cover 42.

[0058] The No. 4 end cover 46 is also a disc-shaped structural member. The diameter of the No. 4 end cover 46 is larger than the diameter of the housing hole. A cylindrical boss is provided at the center of the right end face of the No. 4 end cover 46. The diameter of the cylindrical boss is equal to the diameter of the small diameter hole of the two-stage central stepped hole of the No. 2 bearing seat 45. The two are connected in a sliding fit. A two-stage stepped through hole is provided at the center of the No. 4 end cover 46. A sealing groove with an isosceles trapezoidal cross section is provided on the inner wall of the small diameter hole. The groove The size of the groove is processed according to the felt ring groove size matching the No. 2 felt ring 43 under the standard JB / ZQ4606-1997. Another No. 2 felt ring 43 is installed in this sealing groove. The diameter of the small diameter hole is larger than the outer diameter of the No. 1 sleeve 471. The diameter of the large diameter hole is larger than the inner diameter of the outer bearing ring of the No. 2 cylindrical roller bearing 44 and smaller than the outer diameter of the outer bearing ring of the No. 2 cylindrical roller bearing 44. Four countersunk screw holes with the same structure are evenly arranged around the No. 4 end cover 46.

[0059] The No. 2 bearing seat 45 is a cylindrical annular structural member, and a two-stage central stepped through hole is arranged at the center of the No. 2 bearing seat 45. The small diameter hole section for installing the No. 2 cylindrical roller bearing 44 is located on the left, and the large diameter hole section for installing the No. 3 end cover 42 is located on the right. Four threaded blind holes for mounting bolts are axially arranged on the annular plane at the connection of the two-stage central stepped holes. The outer diameter of the No. 2 bearing seat 45 is equal to the diameter of the small diameter hole in the stepped through hole on the left wall of the temperature and humidity test box 2. The diameter of the small diameter hole section of the No. 2 bearing seat 45 is equal to the outer diameter of the No. 2 cylindrical roller bearing 44, and the axial length of the large diameter hole section of the No. 2 bearing seat 45 is greater than the thickness of the periphery of the No. 3 end cover 42.

[0060] The No. 2 felt ring 43 is a circular sealing ring with a rectangular cross section in accordance with the standard JB / ZQ4606-1997, and is a standard felt ring with an inner diameter of d=45 mm, and its inner diameter is equal to the outer diameter of the No. 1 sleeve 471;

[0061] The inner diameter of the No. 2 cylindrical roller bearing 44 of model NU2310E is equal to the diameter of the small diameter shaft of shaft 19, and the outer diameter is equal to the diameter of the small diameter hole of the No. 2 bearing seat 45. The No. 2 cylindrical roller bearing 44 is installed in the No. 2 bearing seat 45 and is sleeved on the small diameter shaft of shaft 19. The left and right end faces of the inner ring of the No. 2 cylindrical roller bearing 44 are in close contact with the right and left end faces of the No. 1 sleeve 471 and the No. 2 sleeve 472 respectively.

[0062] The No. 1 shaft sleeve 471 and the No. 2 shaft sleeve 472 are both annular structural parts with equal cross-sections. The inner diameters of the No. 1 shaft sleeve 471 and the No. 2 shaft sleeve 472 are equal to the diameter of the small diameter shaft of the shaft 19 on which they are mounted. The outer diameters of the No. 1 shaft sleeve 471 and the No. 2 shaft sleeve 472 are smaller than the diameters of the small diameter holes at the centers of the No. 4 and No. 3 end covers 46 and 42 and on the left wall of the temperature and humidity test chamber 2. The outer diameters of the No. 1 shaft sleeve 471 and the No. 2 shaft sleeve 472 are equal to the inner diameter of the No. 2 felt ring 43.

[0063] The No. 2 bearing seat 45 is installed in the large diameter hole of the stepped through hole on the left wall of the temperature and humidity test box 2, and the No. 2 cylindrical roller bearing 44 is placed in the small diameter hole in the central stepped hole of the No. 2 bearing seat 45. The No. 1 shaft sleeve 471 is located on the left side of the No. 2 cylindrical roller bearing 44, and the No. 2 shaft sleeve 472 is located on the right side of the No. 2 cylindrical roller bearing 44. The left end face of the inner ring of the No. 2 cylindrical roller bearing 44 is in contact with the right end face of the No. 1 shaft sleeve 471. The No. 1 shaft sleeve The left end face of 471 is in contact with the shoulder of shaft 19, the right end face of the inner ring of No. 2 cylindrical roller bearing 44 is in contact with the left end face of No. 2 shaft sleeve 472, the right end face of No. 2 shaft sleeve 472 is in contact with the left end face of the locking nut, No. 1 shaft sleeve 471, No. 2 cylindrical roller bearing 44, No. 2 shaft sleeve 472 are sleeved on shaft 19, and No. 1 shaft sleeve 471, No. 2 cylindrical roller bearing 44, No. 2 shaft sleeve 472 and shaft 19 are in contact with each other; End cover 42 No. 3 is fixed to the large diameter hole on bearing seat 45 No. 2 by using 4 hexagon socket screws and 4 countersunk screw holes thereon. At the same time, the left end face of the cylindrical boss at the center of the left end face of end cover 42 No. 3 is in contact with the right end face of the outer ring of cylindrical roller bearing 44 No. 2; end cover 46 No. 4 is fixed to the outer box wall of the left box wall of temperature and humidity test box 2 by using 4 hexagon socket screws and 4 countersunk screw holes thereon. At the same time, the center of the right end face of end cover 46 No. 4 is in contact with the right end face of cylindrical roller bearing 44 No. 2. The cylindrical boss at the center is installed in the small diameter hole of the two-stage center stepped hole of the No. 2 bearing seat 45, and the right end face of the cylindrical boss on the No. 4 end cover 46 is in contact and connected with the left end face of the outer ring of the No. 2 cylindrical roller bearing 44; two No. 2 felt rings 43 with the same structure are respectively installed in the sealing grooves on the No. 4 end cover 46 and the No. 3 end cover 42, and the inner hole surfaces of the two No. 2 felt rings 43 with the same structure are in contact and connected with the outer cylindrical surfaces of the No. 1 sleeve 471 and the No. 2 sleeve 472.

[0064] See also Figure 3 , Figure 4, the shaft 19 and the shaft 24 are both stepped shafts, and their small diameter ends are provided with shaft shoulders and threads for axial positioning, and both ends of each shaft are provided with keyways for installing flat keys, and the shaft 19 and the shaft 24 are connected with keys and elastic couplings, wherein the shaft 19 is inserted into the No. 2 cylindrical roller bearing 44 installed in the stepped through hole on the left wall of the temperature and humidity test box 2, and the shoulder side of the shaft 19 is in contact with the No. 1 sleeve 471 in the box hole bearing 18, and two nuts are installed on the other side of the shaft 19 to achieve axial fixation; the shaft 24 is inserted into the bearing support 23, and the shoulder side of the shaft 24 is in contact with the No. 3 sleeve 391 of the bearing support 23, and two nuts are installed on the other side of the shaft 24 to achieve axial fixation;

[0065] The tested electromagnetic clutch 21 (the present invention takes the VMTT brand electromagnetic clutch as an example, selects flange type-3, and the product code is VM3-10) is installed on the second shaft 24 and is axially fixed by the shoulder and the elastic retaining ring, so that the electromagnetic clutch 21 is stably installed during the reliability test without affecting the detection accuracy.

[0066] See also Figure 1 and Figure 4 The bearing support 23 is used to support the right side of the shaft 24. The bearing support 23 includes a No. 1 bearing seat 36, a No. 1 end cover 37, two No. 1 felt rings 38, a No. 3 shaft sleeve 391, a No. 4 shaft sleeve 392, a No. 2 end cover 40 and a No. 1 cylindrical roller bearing 41;

[0067] The upper end of the No. 1 bearing seat 36 is a circular ring body with a horizontally placed rotation axis. A three-section stepped through hole is arranged at the center of the circular ring body. The rotation axis of the three-section stepped through hole is collinear with the rotation axis of the circular ring body. The diameters of the left and right end holes are equal, and the lengths of the left and right end holes are also equal. The diameter of the middle section hole between the left and right end holes is smaller than the diameters of the left and right end holes. The diameter of the middle section hole is equal to the outer diameter of the No. 1 cylindrical roller bearing 41, and the diameters of the left and right end holes are greater than or equal to the outer diameters of the No. 1 end cover 37 and the No. 2 end cover 40; threaded blind holes are evenly arranged along the axial direction on the annular end faces at the connection between the left and right end holes and the two ends of the middle section hole, and the number of threaded blind holes is equal to the number of bolt through holes arranged around the No. 1 end cover 37 and the No. 2 end cover 40 and is aligned with each other; No. 1 bearing seat 36 The lower end is a plate-type L-shaped support seat, which is composed of a vertical wall and a mounting base. The vertical wall is a semicircular groove set at one end of the rectangular plate, the diameter of the semicircle is equal to the outer diameter of the annular body, the width of the rectangular plate is equal to the diameter of the semicircular plate, the mounting base is a rectangular plate, the length of the mounting base is equal to the width of the rectangular plate in the vertical wall, and two long strip through holes for installing T-bolts 31 are symmetrically arranged on the mounting base. The vertical wall is vertically connected to one end of the annular body through the end of the semicircular groove, the semicircular plate groove is colinear with the rotation axis of the annular body, the bottom end of the vertical wall is vertically connected to one end of the mounting base, and the mounting base is located directly below the annular body; support ribs are arranged between the annular body at the upper end and the mounting base located below;

[0068] The No. 1 bearing seat 36 is fixed on the simulation workbench 29 by two sets of T-bolts 31; the inner hole wall of the center hole of the No. 1 end cover 37 is provided with a ring-shaped sealing ring groove with an isosceles trapezoidal cross section. The size of the groove is processed according to the felt ring groove size matching the No. 1 felt ring 38 under the standard JB / ZQ4606-1997. A No. 1 felt ring 38 is placed in the sealing ring groove, and the No. 1 end cover 37 is installed in the right end hole on the annular body, and then the No. 1 end cover 37 is fixed to the right end hole of the No. 1 bearing seat 36 by four hexagon socket bolts.

[0069] The inner wall of the center hole of the No. 2 end cover 40 is provided with a sealing ring groove with an isosceles trapezoidal cross section. The size of the groove is processed according to the felt ring groove size matching the No. 1 felt ring 38 under the standard JB / ZQ4606-1997. Another No. 1 felt ring 38 is placed in the sealing ring groove. The No. 2 end cover 40 is installed in the left end hole on the annular body, and then fixed in the left end hole of the No. 1 bearing seat 36 with 4 hexagon socket bolts; the No. 1 cylindrical roller bearing 41 is installed in the No. 1 In the middle hole of the annular body at the upper end of the bearing seat 36, the left end face of the inner ring of the No. 1 cylindrical roller bearing 41 is in contact with the right end face of the No. 3 shaft sleeve 391, and the right end face of the inner ring of the No. 1 cylindrical roller bearing 41 is in contact with the left end face of the No. 4 shaft sleeve 392. The No. 1 cylindrical roller bearing 41 is fixed in the middle hole of the annular body at the upper end of the No. 1 bearing seat 36 through the contact connection of the No. 2 end cover 40 with the No. 1 end cover 37 and the left and right end faces of the outer ring of the No. 1 cylindrical roller bearing 41.

[0070] The No. 1 felt ring 38 is a circular ring seal ring with a rectangular cross section in accordance with the standard JB / ZQ4606-1997, and a standard felt ring with an inner diameter of d=50 mm is selected, and its inner diameter is equal to the outer diameter of the No. 3 sleeve 391;

[0071] The inner diameter of the No. 1 cylindrical roller bearing 41 of model NU1011 is equal to the diameter of the small diameter shaft of the second shaft 24, and the outer diameter is equal to the diameter of the small diameter through hole of the No. 1 bearing seat 36. The No. 1 cylindrical roller bearing 41 is installed in the No. 1 bearing seat 36 and sleeved on the small diameter shaft of the second shaft 24, and its left and right ends are respectively in contact with the right and left end surfaces of the No. 3 shaft sleeve 391 and the No. 4 shaft sleeve 392;

[0072] The vibration sensor 22 is installed on the No. 1 bearing seat 36, wherein the upper end of the No. 1 bearing seat 36 is provided with a plane and a threaded blind hole, and the vibration sensor 22 is installed at the center of the top plane of the No. 1 bearing seat 36 through its own thread;

[0073] The housing hole bearing assembly 18 and the bearing support 23 ensure the smooth operation of the electromagnetic clutch test system, effectively reduce the frequency of unstable factors such as radial runout, and the structure of the housing hole bearing assembly 18 has little effect on the working effect of the temperature and humidity test chamber 2, and does not affect the temperature and humidity loading process and the credibility of the test;

[0074] See also Figure 1The servo motor 28 is a Kollmorgen DC servo motor of model AKM2G4x. The servo motor 28 provides a driving force for the rotary motion of the electromagnetic clutch 21 under test. The servo motor 28 is provided with a built-in encoder 65 to achieve the purpose of controlling the speed. One end of the built-in encoder 65 is connected to the servo motor 28 through an electrical line, and the other end is connected to the J5.4 interface of the programmable controller 64 through an electrical line. The servo motor 28 is fixed to the L-shaped motor bracket 30 by four sets of bolts and nuts.

[0075] The L-shaped motor bracket 30 includes a horizontal base and a vertical support wall. Both the base and the support wall are rectangular plate-type structural members. The base is provided with symmetrical long strip through holes. A circular central through hole for inserting the power supply shaft is provided in the middle of the support wall. Four circular through holes with the same structure for installing bolts are provided around the central through hole. The length of the base is equal to the width of the support wall. The left end of the base and the bottom end of the support wall are vertically connected to form a whole. The length of the base and the width of the support wall are relatively positive.

[0076] The electromagnetic clutch test system 10 is placed inside the box body of the upper left half of the temperature and humidity test box 2. A stepped through hole is provided on the left wall of the temperature and humidity test box 2, and the box hole bearing assembly 18 is installed on the stepped through hole; the No. 1 coupling 9, the box hole bearing assembly 18, the shaft 19, the No. 2 coupling 20, the bearing support 23, the shaft 24, the No. 3 coupling 25, the torque sensor 26, the No. 4 coupling 27 and the servo motor 28 in the electromagnetic clutch test system 10. The rotation axes are collinear and are sequentially installed from left to right on the simulation workbench 29, wherein the housing hole bearing assembly 18 is installed on the stepped through hole of the left wall of the temperature and humidity test chamber 2, the shaft 19 is inserted into the housing hole bearing assembly 18 and extends into the temperature and humidity test chamber, the extended end of the shaft 24 after being inserted into the bearing support 23 is key-connected with the left end of the No. 3 coupling 25, the bearing support 23, the torque sensor assembly, and the L-shaped motor bracket 30 are all installed on the simulation workbench 29 by T-bolts 31;

[0077] The simulation workbench 29 is a rectangular plate casting structure with sufficient strength and rigidity to carry the electromagnetic clutch test system 10. The top of the simulation workbench 29 is provided with a plurality of mutually parallel T-slots of the same structure, which are used to fix the L-shaped motor bracket 30, the torque sensor support seat 17, the bearing support seat 23 and the temperature sensor fixing frame 51. The surface of the simulation workbench 29 adopts a scraping process to ensure the surface accuracy; the bottom end of the simulation workbench 29 is the base of the simulation workbench 29, and a regular octagonal groove is provided in the middle position of the bottom end of the simulation workbench 29, and 8 threaded holes are evenly arranged in the groove. The bottom end of the simulation workbench 29 is fixed to the vibration table panel 32 by 8 bolts;

[0078] The T-bolt assembly includes a T-bolt 31, a flat washer, a spring washer and a nut, wherein the T-bolt is a high-strength bolt that has been heat-treated and passivated. When the T-bolt 31 is working, the lower part is placed in the T-shaped slide groove, and the upper part protrudes out of the slide groove surface and is inserted into the elongated through hole or the circular through hole. Subsequently, the flat washer, the spring washer and the nut are installed in sequence to form a set of T-bolt assemblies.

[0079] 2. Loading system

[0080] See also Figure 1 and Figure 2 , the loading system includes a vibration loading platform 1, a temperature and humidity test chamber 2, and a magnetic powder dynamometer assembly;

[0081] The vibration loading table 1 described in the present invention adopts the Donlim electric vibration series test bench, and the electric vibration test bench model ES-2-230 is selected. This series of test benches has a wide loading frequency, excellent indicators, and high reliability; it can realistically simulate the vibration environment during the actual use of the electromagnetic clutch, improve the over- and under-testing degree of complex specimens, and greatly shorten the test time; the vibration loading reliability test of the tested electromagnetic clutch in a simulated working environment can be carried out.

[0082] The vibration loading platform 1 includes a vibration platform panel 32, a bed base 35, and a vibration loading platform controller 68;

[0083] See also Figure 7 The vibration table panel 32 is a vibration output platform of the vibration loading table 1, which is cone-shaped as a whole, and the top is a regular octagonal plate. The regular octagonal plate structure at the top of the vibration table panel 32 is the same as the regular octagonal groove structure at the bottom of the simulation workbench 29. Eight through holes are evenly arranged on the regular octagonal plate at the top of the vibration table panel 32. The 8 through holes on the vibration table panel 32 are aligned with the 8 threaded holes at the bottom of the simulation workbench 29. The simulation workbench 29 is installed on the vibration table panel 32 with 8 bolts; the bottom of the vibration table panel 32 is a cylinder, and 8 ribs are evenly arranged around the circumference of the cylinder. The bottom end of the cylinder at the bottom of the vibration table panel 32 is provided with a A threaded hole for installing the vibration output shaft is provided, the bottom of the vibration table panel 32 is connected to the vibration output shaft, and the vibration output shaft extends from the top center of the vibration loading table 1. The vibration loading table controller 68 is built into the vibration loading table 1, and the thrust and movement speed in different directions can be adjusted to achieve the purpose of controlling the vibration loading; through the vibration loading table controller 68, the vibration output shaft realizes the composite movement of the workbench along the X, Y, and Z axis directions and the rotation around the X, Y, and Z directions, so as to realize the simulated vibration loading of the vibration table panel 32. The vibration loading table 1 is installed at the lower left end of the temperature and humidity test box 2 and is installed on the foundation through the bed base 35;

[0084] The bed base 35 is a rectangular plate-type casting structure, which has sufficient strength and rigidity to carry the vibration loading platform 1. The length and width of the bed base 35 are greater than the length and width of the vibration loading platform 1.

[0085] See also Figure 8 The vibration loading platform controller 68 is a sub-component of the Donlim electric vibration series test platform, which is integrated and installed inside the vibration loading platform 1. One side of the vibration loading platform controller 68 is connected to the electrical system in the vibration loading platform 1 through an electrical connection line, and the other side of the vibration loading platform controller 68 is connected to the J5 interface of the programmable controller 64 through an electrical connection line;

[0086] The temperature and humidity test box 2 described in the present invention adopts a temperature and humidity test box of Gaotian model GT-TH-S-225, adopts a fully enclosed compressor, and has a double-layer insulation observation window on the box door and a box door handle. The temperature and humidity test box 2 can simulate the temperature and humidity of the working environment of the electromagnetic clutch under test. The temperature and humidity test box 2 is divided into two parts, the left end of which is divided into two parts, the upper and lower parts, through a box bottom wall with a through hole. The upper part of the left end is a closed structure box, and an electromagnetic clutch test system 10 is installed in the box. When the box door is closed, the interior of the box is well sealed, and the lower part of the left end is a non-closed structure. A vibration loading platform 1 is installed at the lower left end, and a through hole is set at the center of the bottom of the closed box at the upper left end for the insertion of the output shaft of the vibration loading platform 1. A sealing device is installed between the output shaft and the inner wall of the through hole to ensure the accuracy of loading of the temperature and humidity test box 2. A stepped through hole is set on the left side wall of the temperature and humidity test box 2, and 4 evenly distributed threaded holes are set around the stepped through hole on the outside of the left side wall of the temperature and humidity test box 2; 4 threaded holes are set inside the left side wall and just below the stepped through hole, and these 4 threaded holes are aligned with the 4 through holes on the displacement sensor fixing seat 48 for the installation of the displacement sensor fixing seat 48.

[0087] See also Figure 2 and Figure 8 The right end of the temperature and humidity test box 2 is provided with a temperature and humidity test box interface 11 and a temperature and humidity test box control panel 15. The temperature and humidity test box interface 11 includes a network cable and a USB interface for data output. The electrical wire of the temperature and humidity test box control panel 15 is connected to the computer 62 in the operating console 14 of the control system;

[0088] See also Figure 8 The temperature and humidity test chamber controller 69 is an internal controller of the temperature and humidity test chamber 2, and is integrated and installed inside the temperature and humidity test chamber 2. One end of the temperature and humidity test chamber controller 69 is connected to the temperature and humidity test chamber 2 through an electrical line, and the other end is connected to the J5.2 interface of the programmable controller 64 through an electrical line;

[0089] The magnetic powder dynamometer assembly includes a magnetic powder dynamometer 8, a magnetic powder dynamometer fixing seat 7, a magnetic powder dynamometer base 16 and a dynamometer mounting stand;

[0090] The magnetic powder dynamometer 8 described in the present invention adopts a magnetic powder dynamometer model GZF20 produced by Guangzhong Electric, and is used in conjunction with a dynamometer mounting stand. The magnetic powder dynamometer 8 is internally integrated with a magnetic powder dynamometer controller 70. The load can be changed by adjusting the excitation current. The use is simple and has good control performance. The torque that the electromagnetic clutch 21 is subjected to in actual operation can be simulated, and a torque loading reliability test of a simulated working condition can be performed on the electromagnetic clutch 21 under test.

[0091] See also Figure 1 and Figure 2 The magnetic powder dynamometer fixing seat 7 is a rectangular plate casting structure, which is divided into two layers, the lower layer is larger in length and width than the upper layer, the upper layer is provided with four threaded holes for fixing the magnetic powder dynamometer base 16, and the dynamometer base 16 is fixed to the magnetic powder dynamometer fixing seat 7 by bolts; the lower layer is provided with four circular through holes, and four groups of T-bolt assemblies pass through the four through holes of the lower layer of the magnetic powder dynamometer fixing seat 7 to fix the magnetic powder dynamometer fixing seat 7 to the dynamometer mounting stand;

[0092] The magnetic powder dynamometer base 16 is a U-shaped structural member, which is divided into three sections: left, middle and right, including a horizontal base in the middle and vertical support walls at the left and right ends. The base and the left and right support walls are all rectangular plate-type structural members. Four circular through holes are provided on the base, and the four through holes are aligned with the four threaded holes on the magnetic powder dynamometer fixing seat 7. A circular through hole for installing the magnetic powder dynamometer 8 is provided in the middle position of the left and right support walls. The left and right through holes on the left and right support walls are collinear with the rotation axis of the output shaft of the magnetic powder dynamometer 8. The length of the base is equal to the width of the left and right support walls. The left and right ends of the base are vertically connected to the bottom ends of the left and right support walls into one body. The length of the base is relatively positive to the width of the left and right support walls. The magnetic powder dynamometer base 16 is mounted on the magnetic powder dynamometer fixing seat 7 by four bolts.

[0093] The dynamometer mounting frame includes 8 support beams 3 with the same structure, 4 footings 4 with the same structure, 4 support legs 5 with the same structure and a dynamometer workbench 6; a magnetic powder dynamometer fixing base 7 is mounted on the dynamometer workbench 6 through T-bolts 31, the dynamometer workbench 6 is mounted on the top of the support frame, and the support frame is mounted on the foundation;

[0094] The support beam 3 is a cuboid with a rectangular cross section, and rectangular bosses with a length and width smaller than the length and width of the cross section of the support beam 3 are arranged at both ends; the support leg 5 is a cuboid with a rectangular cross section, and among the four side surfaces of the support leg 5, two adjacent inner side surfaces are provided with two upper and lower rectangular grooves with the same length and width as the bosses at both ends of the support beam 3, that is, each support leg 5 has a total of four grooves for the support beam 3 to be assembled; the foot 4 is a hemispherical hollow structural member with a plane at the top, and a circular through hole is opened in the center of the plane at the top; 8 support beams 3 with the same structure and 4 support legs 5 are riveted to form a firm support frame, and a threaded hole is arranged at the bottom end of the support leg 5, and the bottom end of each support leg 5 is connected and installed with the foot 4 by bolts, and the bolts extend from one side of the hollow foot 4, pass through the through hole on one side of the plane and are locked with the locking nut, and are threadedly connected with the threaded hole arranged at the bottom end of the support leg 5; the dynamometer mounting stand is placed on the left side of the temperature and humidity test chamber 2 as a whole;

[0095] The dynamometer workbench 6 is a rectangular plate casting structure with sufficient strength and rigidity to carry the magnetic powder dynamometer assembly; the top of the dynamometer workbench 6 is provided with two T-shaped through slots of the same structure and parallel to each other, which are used to fix the magnetic powder dynamometer fixing seat 7; the surface of the dynamometer workbench 6 is scraped and ground to ensure the surface accuracy; the bottom end of the dynamometer workbench 6 is fixed to the top of the support frame by welding;

[0096] The dynamometer mounting stand and the magnetic powder dynamometer fixing seat 7 are both provided to enable the magnetic powder dynamometer 8 to operate normally, and the input shaft of the magnetic powder dynamometer 8 is colinear with the rotation center line of the shaft 19;

[0097] See also Figure 8 , one end of the magnetic powder dynamometer controller 70 is connected to the magnetic powder dynamometer 8 through an electrical line, and the other end is connected to the J5.3 interface of the programmable controller 64 through an electrical line;

[0098] 3. Detection system

[0099] See also Figure 1 , Figure 2 and Figure 5 , the detection system in the electromagnetic clutch reliability test device includes a displacement sensor assembly 34, a temperature sensor assembly 33, a torque sensor assembly, a vibration sensor 22, and a digital display voltmeter 13; wherein the displacement sensor assembly 34, the temperature sensor assembly 33, the torque sensor assembly, and the vibration sensor 22 are all arranged in the temperature and humidity test chamber 2, the displacement sensor assembly 34 includes a displacement sensor 49 and a displacement sensor fixing seat 48, the temperature sensor assembly 33 includes a temperature sensor 50 and a temperature sensor fixing bracket 51, and the torque sensor assembly includes a torque sensor 26 and a torque sensor support seat 17;

[0100] The displacement sensor 49 described in the present invention adopts the LJ-V7080 medium-distance displacement sensor. This series of laser displacement sensors can adapt to a variety of temperature and humidity environments, with moderate measurement distance and high accuracy. The displacement sensor 49 is installed on the inner side of the left wall of the temperature and humidity test box 2, and is not affected by the vibration table loading. It can effectively detect the displacement of the flange of the electromagnetic clutch 21 under test, thereby indirectly detecting the armature stroke of the electromagnetic clutch 21 under test when it is working, and recording relevant data. When the armature stroke of the electromagnetic clutch 21 under test exceeds a preset threshold, an alarm signal is issued, the test is stopped, and fault information of a test device is formed, thereby achieving the purpose of detecting the armature stroke of the electromagnetic clutch.

[0101] See also Figure 5 , the displacement sensor 49 is provided with two threaded holes at the rear, the displacement sensor fixing seat 48 is provided with two through holes in the middle, the displacement sensor 49 is mounted on the displacement sensor fixing seat 48 by two bolts, four through holes are provided on both sides of the displacement sensor fixing seat 48, and the inner side of the left side box wall of the corresponding temperature and humidity test box 2 is provided with four threaded holes, the displacement sensor fixing seat 48 is installed on the inner side of the left side box wall of the temperature and humidity test box 2 by four bolts, the electrical wire of the displacement sensor 49 is connected to the acquisition interface of the analog signal channel 4 of the data acquisition card 63, and the computer 62 calculates the difference between the displacement of the actual armature stroke of the electromagnetic clutch and the standard armature stroke;

[0102] The temperature sensor 50 described in the present invention adopts a YTDZAS high-precision infrared thermometer with a temperature measurement range of -30°C to 500°C, which meets the requirements for measuring the temperature of the electromagnetic clutch friction plate. The protection level is IP65, and it is not affected by the humidity in the temperature and humidity test box, and can accurately measure the temperature. It can effectively detect the temperature of the friction plate of the electromagnetic clutch 21 under test and record relevant data. When the temperature of the electromagnetic clutch friction plate rises too fast, an alarm signal is issued to stop the test process and form a fault information of the test device, thereby achieving the purpose of detecting the temperature of the electromagnetic clutch friction plate.

[0103] See also Figure 5 The temperature sensor 50 has a cylindrical head and a threaded tail. It is installed on the upper part of the temperature sensor fixing frame 51 through a nut and a thread. A through hole is provided at the lower part of the temperature sensor fixing frame 51 for inserting a T-bolt 31 and fixing it with a nut. The electrical wire of the temperature sensor 50 is connected to the acquisition interface of the analog signal channel 5 of the data acquisition card 63.

[0104] The torque sensor 26 of the present invention adopts the ZJ-A standard torque and speed sensor of Lanlink Technology, the specific model is ZJ-20A; the input shaft and the output shaft are short shafts with flat keys, and the electrical wire of the torque sensor 26 is connected to the acquisition interface of the analog signal channel 3 of the data acquisition card 63;

[0105] See also Figure 5 The torque sensor support seat 17 is a double-layer rectangular casting structure, the upper layer is provided with four threaded holes, the torque sensor 26 is fixed to the torque sensor support seat 17 by four bolts, the lower part of the torque sensor support seat 17 is provided with two symmetrical long strip through holes, and the torque sensor support seat 17 is installed on the simulation workbench 29 by T-bolts 31;

[0106] The vibration sensor 22 described in the present invention adopts the VB-451SCB vibration sensor of Yuanwulian, which detects the static and dynamic acceleration in the test system. By comparing the vibration information set by the vibration loading platform with the vibration information collected by the vibration sensor, the vibration detection of the electromagnetic clutch 21 can be realized. Its electrical wire is connected to the acquisition interface of the analog signal channel 2 of the data acquisition card 63. When the vibration data collected by the vibration sensor 22 is too large and exceeds the set threshold value, affecting the normal operation of the electromagnetic clutch 21, the test is stopped and the data is recorded to form a fault information.

[0107] See also Figure 4 The top of the bearing support 23 is provided with a plane and a threaded hole, and the vibration sensor 22 is installed on the top of the bearing support 23 through its own thread;

[0108] The digital voltmeter 13 is an independent detection component and can be placed on the top of the operating table 14. Its electrical line is connected to the acquisition interface of the analog signal channel 1 of the data acquisition card 63. The voltmeter is used to measure the working voltage of the electromagnetic clutch 21. When a sudden voltage change occurs and the electromagnetic clutch 21 cannot work normally, the test is stopped and the data is recorded to form a fault information.

[0109] 4. Control system

[0110] The control system in the electromagnetic clutch reliability test device includes an adjustable power supply box 12 and an operating table 14;

[0111] See also Figure 2 and Figure 6 The operating table 14 is placed on the right side of the temperature and humidity test chamber 2, and the adjustable power supply box 12 is placed on the top of the operating table 14. One side of the adjustable power supply box 12 is connected to the programmable controller 64 in the operating table 14, and the other side is connected to the electromagnetic clutch 21, receiving the control signal transmitted by the programmable controller 64, and making corresponding changes to the power supply voltage of the electromagnetic clutch 21;

[0112] The operating console 14 includes a system operation light 52, a system operation button 53, a system stop light 54, a system stop button 55, a keyboard and mouse 56, a display 57, a loading and running button 58, a loading and stopping button 59, a reset button 60, an emergency stop button 61, a computer 62, a data acquisition card 63, a programmable controller 64, and a multi-core plug 67; the computer 62 is the core of the control system and is installed inside a box at the bottom of the operating console 14, and the keyboard and mouse 56, the display 57, the programmable controller 64, and the data acquisition card 63 are respectively connected to the computer 62 installed with a data processing program 66;

[0113] The keyboard and mouse 56 are installed on the upper end surface of the extended part of the operating table 14, and the electrical wires thereof are connected to the USB interface of the computer 62. The display 57 is a liquid crystal display, installed on the inclined surface of the upper part of the operating table 14, and connected to the display interface of the computer 62 via an HDMI cable.

[0114] The data acquisition card 63 described in the present invention adopts the PCI-1250 series data acquisition card of the Smacq brand, and the model is PCI-1255, with a high sampling rate and a number of channels that meet the test requirements; it is installed inside the computer 62 and connected to the card slot of the mainboard of the computer 62. The data acquisition card 63 analog signal channel 1 to channel 5 acquisition interface is connected to the electrical wires of the digital display voltmeter 13, the vibration sensor 22, the torque sensor 26, the displacement sensor 49, and the temperature sensor 50 in sequence, and respectively collects the working voltage of the electromagnetic clutch 21, the vibration data of the vibration sensor 22, the torque data of the input and output of the electromagnetic clutch 21, the displacement data of the armature stroke, and the temperature data of the friction plate;

[0115] The programmable controller 64 is a PMAC-Lite programmable controller of the American Del tu brand, installed inside the computer 62, one end of the electrical connection line is connected to the J4 (RS-422) interface of the programmable controller 64, and the other end is connected to the 1394 interface of the computer 62 motherboard;

[0116] The multi-core plug 67 adopts a small multi-core plug of the Misumi brand Dsub series. A 12-core multi-core plug is selected and installed inside the computer 62. The electrical wire of the multi-core plug 67 is connected to the J5 interface of the programmable controller 64; the I0.0 interface of the input end of the multi-core plug 67 is connected to the 1 interface of the system operation button 53 by an electrical wire, the I0.1 interface of the input end is connected to the 1 interface of the system stop button 55 by an electrical wire, and the I0.2 interface of the input end is connected to the 1 interface of the load operation button 58 by an electrical wire. The I0.3 interface at the input end is connected to the 1 interface of the load stop button 59 by an electrical line, the I0.4 interface at the input end is connected to the 1 interface of the reset button 60 by an electrical line, and the I0.5 interface at the input end is connected to the 1 interface of the emergency stop button 61 by an electrical line; the O2.0 interface at the output end of the multi-core plug 67 is connected to the X1 interface of the system running light 52 by an electrical line, and the O2.1 interface at the output end is connected to the X1 interface of the system stop light 54 by an electrical line;

[0117] During the test, first press the system operation button 53, the system operation light 52 lights up, the electromagnetic clutch test system starts on the simulation workbench 29 according to the preset test program, the electromagnetic clutch 21 works, press the reset button 60 to ensure that the loading system is empty, determine the loading type according to the working environment, determine the loading parameters and failure threshold, and enter the loading parameters and failure threshold on the operating table 14. If loading is required, press the loading operation button 58 after setting the value. If the test needs to be paused during the test, short press the system stop button 55, the system stop light 54 flashes, if there is loading, the loading system will stop running at this time. If you need to continue the test, press the system operation button 53 again, the system operation light 52 lights up, if there is loading, the loading system will start to continue the test. Finally, after the program is executed, long press the system stop button 55, the system stop light 54 stays on, and the test ends;

[0118] The data processing program 66 is pre-installed in the computer 62. The data processing program includes three parts. The first part is the electromagnetic clutch test program set before the test and the loading program set during the test. The second part is to record and calculate the data collected during the entire test process. The third part is to count the continuous trouble-free working time T(i) of the electromagnetic clutch test system 10 under different loading conditions after the test, use mathematical analysis methods to determine the distribution law of the fault interval time, and calculate the reliability function R(t), failure rate function λ(t) and mean failure interval time MTBF of the electromagnetic clutch test system 10.

[0119] 2. Reliability test method of electromagnetic clutch

[0120] The electromagnetic clutch reliability test method of the present invention is a method based on the electromagnetic clutch reliability test device described above, and proposes a complete reliability test method for the electromagnetic clutch 21 under test;

[0121] See also Fig. 9 , the steps of the electromagnetic clutch reliability test method are as follows:

[0122] 1. Determine the model and working parameters of the electromagnetic clutch 21 under test, determine the starting voltage, armature stroke, temperature rise speed and no-load torque information of the electromagnetic clutch 21 when it works normally, and input them into the computer 62 in the operating table 14;

[0123] 2. Install the electromagnetic clutch 21. Install the electromagnetic clutch 21 on the simulation workbench 29. Check whether there is dust or oil on the friction plate, whether the coil is worn, and whether the installation is eccentric. After fixing, use a micrometer or other testing instruments to verify whether the installation of the electromagnetic clutch test system meets the installation requirements;

[0124] 3. Determine the test conditions and thresholds based on the working conditions, and determine the test conditions, loading system parameters and warning thresholds of the detection system based on the actual working conditions;

[0125] 4. Set loading parameters and conduct reliability tests, conduct temperature simulation loading, humidity simulation loading, vibration loading, power supply voltage change, torque loading on the electromagnetic clutch reliability test, determine the loading parameter range and loading form according to the requirements of the electromagnetic clutch 21 to simulate the loading condition, and input them into the computer 62 in the operating table 14; determine the test process and each step in the process of the reliability test according to the requirements of the electromagnetic clutch 21 simulated loading condition, and then start the reliability test of the electromagnetic clutch 21;

[0126] 5. Collect the test parameters of the electromagnetic clutch 21 under different working conditions, record the failure type and failure frequency of the electromagnetic clutch 21 under different loading conditions, the main failure forms of the electromagnetic clutch are: increased armature stroke, excessive temperature rise of the friction plate, excessive torque loading, impact during the engagement process and failure to start; for the above failure forms, collect the temperature value, humidity value and armature stroke change range of the electromagnetic clutch 21 under test, electromagnetic clutch 21 friction plate temperature, electromagnetic clutch 21 vibration frequency, electromagnetic clutch 21 input and output torque change and voltage change data information through the data acquisition card 63;

[0127] 6. Analyze and record test data, display test parameters and electromagnetic clutch failure forms in computer software and analyze failure causes, analyze causes of abnormal signal changes or possible faults, and record test data. After each test, classify and store each set of test data, including test time, detection signal data, fault data, and failure forms, for easy analysis;

[0128] The following are the steps for each test method:

[0129] (1) Temperature and humidity simulation loading test

[0130] 1) According to the working conditions that the electromagnetic clutch 21 under test needs to simulate loading, determine the test temperature and humidity range of the temperature and humidity simulation loading, the rate of temperature and humidity change and the corresponding test time, and formulate a periodic electromagnetic clutch 21 reliability test temperature and humidity loading plan;

[0131] 2) Inputting the specific parameters of the temperature and humidity loading scheme of the electromagnetic clutch 21 reliability test into the computer 62 in the operating console 14;

[0132] 3) Check the electrical and mechanical structures of the electromagnetic clutch reliability test device to ensure that the electromagnetic clutch 21 can operate normally and smoothly, adjust the distance between the components to a suitable position, and after standing for 12 hours, start the servo motor 28 and the magnetic powder dynamometer 8. At this time, the magnetic powder dynamometer 8 is unloaded, and observe and record the detection data of the electromagnetic clutch 21 under no-load conditions; after the operation is stable, start the temperature and humidity test box 2, and perform a loading test according to the pre-made loading temperature and humidity scheme;

[0133] 4) Display the test data in the human-computer interaction interface of the computer software, and compare the test data collected when only the temperature and humidity are loaded with the test data when not loaded; when the monitored signal is found to be abnormal during the test, an alarm is given in time and the machine is shut down, and the electromagnetic clutch 21 under test is checked according to the detection signal, and its failure mode is determined according to the warning threshold;

[0134] (2) Vibration loading test

[0135] 1) According to the working conditions that need to be simulated for the electromagnetic clutch 21 under test, the vibration mean, amplitude, frequency and test time in each of the three directions of X, Y and Z in the vibration loading test are determined, and a vibration loading plan for the periodic electromagnetic clutch reliability test device is formulated.

[0136] 2) Inputting the vibration loading scheme of the reliability test of the electromagnetic clutch 21 into the computer 62 of the operating console 14;

[0137] 3) Check the electrical and mechanical structures of the electromagnetic clutch reliability test device to ensure that the electromagnetic clutch 21 can operate normally and smoothly, adjust the distance between the components to a suitable position, and after standing for 12 hours, start the servo motor 28 and the magnetic powder dynamometer 8. At this time, the magnetic powder dynamometer 8 is unloaded, and observe and record the detection data of the electromagnetic clutch 21 under no-load conditions; after the operation is stable, start the vibration loading platform 1, and perform a loading test according to the prefabricated loading vibration scheme;

[0138] 4) Display the test data in the human-computer interaction interface of the computer software, and compare the test data collected when only the vibration is loaded with the test data when the vibration is not loaded; when the monitored signal is found to be abnormal during the test, an alarm is given in time and the machine is shut down, and the electromagnetic clutch 21 under test is checked according to the detection signal, and its failure mode is determined according to the warning threshold;

[0139] (3) Test on the influence of supply voltage change on the reliability of electromagnetic clutch

[0140] 1) According to the power supply voltage that needs to be simulated loaded by the tested electromagnetic clutch 21, determine the supply voltage amplitude change range, voltage change rate, voltage interference value and corresponding test time in the voltage loading test, and formulate a periodic voltage change plan;

[0141] 2) Inputting the power supply voltage variation loading scheme of the reliability test of the electromagnetic clutch 21 into the computer 62 of the operating console 14;

[0142] 3) Check the electrical and mechanical structures of the electromagnetic clutch reliability test device to ensure that the electromagnetic clutch 21 can operate normally and smoothly, adjust the distance between the components to a suitable position, and after standing for 12 hours, start the servo motor 28 and the magnetic powder dynamometer 8. At this time, the magnetic powder dynamometer 8 is unloaded, and observe and record the detection data of the electromagnetic clutch 21 under no-load conditions; after stable operation, adjust the power supply voltage of the electromagnetic clutch 21 according to the preset loading scheme to control the power supply voltage value of the electromagnetic clutch 21, and conduct the test according to the predetermined power supply voltage change scheme;

[0143] 4) Test and display the test data in the human-computer interaction interface of the computer software, and compare the test data collected only when the power supply voltage changes with the test data when the power supply voltage does not change; when the monitored signal is found to be abnormal during the test, the alarm is promptly sounded and the machine is shut down, and the electromagnetic clutch under test is checked according to the detection signal, and its failure mode is determined according to the parameters;

[0144] (4) Torque loading test

[0145] 1) According to the working conditions that the electromagnetic clutch 21 under test needs to simulate loading, determine the static loading and dynamic loading schemes in the torque loading test; formulate a torque loading scheme for the periodic electromagnetic clutch reliability test device;

[0146] 2) Inputting the torque loading scheme of the reliability test of the electromagnetic clutch 21 into the computer 62 of the operating console 14;

[0147] 3) Check the electrical and mechanical structures of the electromagnetic clutch reliability test device to ensure that the electromagnetic clutch 21 can operate normally and smoothly, adjust the distance between the components to a suitable position, and after standing for 12 hours, start the servo motor 28 and the magnetic powder dynamometer 8. At this time, the magnetic powder dynamometer 8 is unloaded, and observe and record the detection data of the electromagnetic clutch 21 under no-load conditions; after the operation is stable, start the magnetic powder dynamometer 8 and perform a loading test according to the pre-made loading torque scheme;

[0148] 4) Test and display the test data in the human-machine interaction interface of the computer software; compare the test data collected when only the torque is loaded with the test data when the torque is not loaded; when the monitored signal is found to be abnormal during the test, alarm and stop the machine in time, check the electromagnetic clutch 21 under test according to the detection signal, and determine its failure mode according to the parameters;

[0149] (5) Temperature, humidity and vibration loading test

[0150] 1) Formulate a temperature, humidity and vibration loading scheme for the electromagnetic clutch reliability test device according to the working conditions that the electromagnetic clutch 21 under test needs to simulate loading;

[0151] 2) Input the specific parameters of the temperature and humidity loading scheme of the electromagnetic clutch 21 reliability test into the temperature and humidity test chamber control panel 15, and input the vibration loading scheme into the computer 62 of the operating table 14;

[0152] 3) Check the electrical and mechanical structures of the electromagnetic clutch reliability test device, install the electromagnetic clutch 21 after confirming that it is correct, ensure that the electromagnetic clutch 21 can operate normally and smoothly, adjust the distance between the components to the appropriate position, start the servo motor 28 and the magnetic powder dynamometer 8. At this time, the magnetic powder dynamometer 8 is unloaded, observe and record the detection data of the electromagnetic clutch 21 under no-load conditions. After the operation is stable, start the temperature and humidity test box 2, and perform the loading test according to the pre-made loading temperature, humidity and vibration scheme;

[0153] 4) Test and display the test data in the human-computer interaction interface of the computer software, and compare the test data collected when the temperature, humidity and vibration are loaded with the test data when not loaded; during the test, if the monitored signal is found to be abnormal, alarm and stop the machine in time, check the electromagnetic clutch under test according to the detection signal, and determine its failure mode according to the parameters;

[0154] (6) The electromagnetic clutch reliability test can be carried out according to the requirements of the test simulation conditions, such as temperature and humidity simulation loading test (1), vibration loading test (2), test on the influence of power supply voltage change on the reliability of the electromagnetic clutch (3) and torque loading test (4). These four tests can also be carried out in a certain order, or the above tests can be combined. The order and time of the tests can be changed according to the requirements of the electromagnetic clutch 21 reliability test.

Claims

1. An electromagnetic clutch reliability test device, Features , the electromagnetic clutch reliability test device comprises an electromagnetic clutch test system (10), a loading system, a detection system and a control system; The electromagnetic clutch test system (10) comprises a simulation workbench (29); The loading system comprises a vibration loading platform (1), a temperature and humidity test chamber (2) and a magnetic powder dynamometer assembly; The control system comprises an adjustable power supply box (12) and an operating table (14); The temperature and humidity test box (2) is installed on the foundation, the electromagnetic clutch test system (10) is installed in a closed box body at the upper left end of the temperature and humidity test box (2), the left end of the electromagnetic clutch test system (10) is installed in a through hole on the left box wall of the temperature and humidity test box (2) using a box hole bearing assembly (18) and extends out of the left box wall, the vibration loading platform (1) is installed on a bed base (35) at the lower left end of the temperature and humidity test box (2), the regular octagonal plate on the top of the vibration platform panel (32) is bolted to the bottom end of the simulation workbench (29), the bottom end of the cylinder at the bottom of the vibration platform panel (32) is threadedly connected to the vibration output shaft of the vibration loading platform (1), and the left end of the electromagnetic clutch test system (10) is keyed to the input shaft of the magnetic powder dynamometer (8) in the magnetic powder dynamometer assembly installed on the left side of the temperature and humidity test box (2) through a No. 1 coupling (9); The operating table (14) is placed on the right side of the temperature and humidity test chamber (2); the adjustable power box (12) is placed on the top of the operating table (14); one end of the adjustable power box (12) is connected to a programmable controller (64) in the operating table (14); and the other end is connected to the electromagnetic clutch (21) to be tested; the digital display voltmeter (13) in the detection system is placed on the top of the operating table (14); the displacement sensor assembly (34), the temperature sensor assembly (33), the torque sensor assembly and the vibration sensor (22) are installed in the temperature and humidity test chamber; and the detection system is connected to a data acquisition card (63) in the operating table (14) by wire.

2. According to the electromagnetic clutch reliability test device of claim 1, Features The electromagnetic clutch test system (10) further comprises shaft 1 (19), No. 2 coupling (20), bearing support (23), shaft 2 (24), No. 3 coupling (25), torque sensor (26), No. 4 coupling (27), servo motor (28), L-shaped motor bracket (30) and 8 sets of T-shaped bolts (31) of the same structure; The right end of the No. 1 coupling (9) is connected to the left end of the shaft 1 (19) installed in the housing hole bearing assembly (18) through a flat key, the right end of the shaft 1 (19) is connected to the left end of the No. 2 coupling (20) through a flat key, the right end of the No. 2 coupling (20) is connected to the left end of the shaft 2 (24) through a flat key, the right end of the shaft 2 (24) installed in the bearing support (23) is connected to the left end of the No. 3 coupling (25) through a flat key, and the right end of the No. 3 coupling (25) is connected to the torque sensor The left end of the torque sensor (26) is connected to the left end of the No. 4 coupling (27) through a flat key, the right end of the No. 4 coupling (27) is connected to the output shaft of the servo motor (28) installed on the L-shaped motor bracket (30) through a flat key; the bearing support (23), the torque sensor (26) and the L-shaped motor bracket (30) are installed on the top of the simulation workbench (29) from left to right through the through holes at their bottom ends using T-bolts (31).

3. According to the electromagnetic clutch reliability test device as claimed in claim 2, Features The housing hole bearing assembly (18) comprises a No. 3 end cover (42), two No. 2 felt rings (43) of the same structure, a No. 2 cylindrical roller bearing (44), a No. 2 bearing seat (45), a No. 4 end cover (46), a No. 1 shaft sleeve (471) and a No. 2 shaft sleeve (472); The No. 2 bearing seat (45) is installed in the large diameter hole of the stepped through hole on the left wall of the temperature and humidity test box (2), the No. 2 cylindrical roller bearing (44) is placed in the small diameter hole in the central stepped hole of the No. 2 bearing seat 45, the No. 1 shaft sleeve (471) is located on the left side of the No. 2 cylindrical roller bearing (44), the No. 2 shaft sleeve (472) is located on the right side of the No. 2 cylindrical roller bearing (44), and the left end face of the inner ring of the No. 2 cylindrical roller bearing (44) is aligned with the right end face of the No. 1 shaft sleeve (471). The left end face of the No. 1 shaft sleeve (471) is in contact with the shaft shoulder of the shaft 1 (19), the right end face of the inner ring of the No. 2 cylindrical roller bearing (44) is in contact with the left end face of the No. 2 shaft sleeve (472), the right end face of the No. 2 shaft sleeve (472) is in contact with the left end face of the locking nut, and the No. 1 shaft sleeve (471), the No. 2 cylindrical roller bearing (44), and the No. 2 shaft sleeve (472) are sleeved on the shaft 1 (19); the No. 3 end cover (42) is fixed with four hexagon socket screws. The end cap (46) is fixed to the outer wall of the left wall of the temperature and humidity test chamber (2) by using four hexagon socket screws and four countersunk screw holes thereon, and the cylindrical boss at the center of the left end face of the end cap (42) is inserted into the outer wall of the left wall of the temperature and humidity test chamber (2) by using four hexagon socket screws and four countersunk screw holes thereon, and the cylindrical boss at the center of the right end face of the end cap (46) is inserted into the outer wall of the left wall of the temperature and humidity test chamber (2). The right end face of the cylindrical boss on the No. 4 end cover (46) is in contact with the left end face of the outer ring of the No. 2 cylindrical roller bearing (44) in the small diameter hole of the two-stage center stepped hole of the No. 4 bearing seat (45); the two No. 2 felt rings (43) with the same structure are respectively installed in the sealing grooves on the No. 4 end cover (46) and the No. 3 end cover (42); the inner hole surfaces of the two No. 2 felt rings (43) with the same structure are in contact with the outer cylindrical surfaces of the No. 1 shaft sleeve (471) and the No. 2 shaft sleeve (472).

4. According to the electromagnetic clutch reliability test device as claimed in claim 2, Features The bearing support (23) comprises a No. 1 bearing seat (36), a No. 1 end cover (37), two No. 1 felt rings (38) of the same structure, a No. 3 shaft sleeve (391), a No. 4 shaft sleeve (392), a No. 2 end cover (40) and a No. 1 cylindrical roller bearing (41); The No. 1 end cover (37) is installed in the right end hole of the annular body at the upper end of the No. 1 bearing seat (36), and then the No. 1 end cover (37) is fixed by four hexagon socket bolts. The No. 2 end cover (40) is installed in the left end hole of the annular body, and then the No. 2 end cover (40) is fixed by four hexagon socket bolts. The No. 1 cylindrical roller bearing (41) is installed in the middle hole of the annular body, and the left end face of the inner ring of the No. 1 cylindrical roller bearing (41) is in contact with the right end face of the No. 3 shaft sleeve (391), and the right end face of the inner ring of the No. 1 cylindrical roller bearing (41) is in contact with the left end face of the No. 4 shaft sleeve (392). The right cylindrical roller bearing (41) at the center of the right end face of the No. 2 end cover (40) is connected to the right end face of the No. 4 shaft sleeve (392). The boss is installed in the left end of the middle hole of the annular body, and the right end surface of the right cylindrical boss is in contact with the left end surface of the outer ring of the No. 1 cylindrical roller bearing (41). The left cylindrical boss at the center of the left end surface of the No. 1 end cover (37) is installed in the right end of the middle hole of the annular body, and the left end surface of the left cylindrical boss is in contact with the right end surface of the outer ring of the No. 1 cylindrical roller bearing (41); two No. 1 felt rings (38) with the same structure are respectively installed in the sealing ring grooves on the No. 2 end cover (40) and the No. 1 end cover (37), and the inner hole surfaces of the two No. 1 felt rings (38) with the same structure are in contact with the outer cylindrical surfaces of the No. 3 shaft sleeve (391) and the No. 4 shaft sleeve (392).

5. According to the electromagnetic clutch reliability test device of claim 1, Features The magnetic powder dynamometer assembly further comprises a magnetic powder dynamometer fixing seat (7), a magnetic powder dynamometer support (16), a magnetic powder dynamometer controller (70) and a dynamometer mounting stand; The magnetic powder dynamometer (8) is a GZF20 magnetic powder dynamometer. The magnetic powder dynamometer (8) is mounted on the upper end of a magnetic powder dynamometer support (16). The two are rotatably connected. The rotation axis of the magnetic powder dynamometer (8) is colinear with the rotation axis of the electromagnetic clutch test system (10). The magnetic powder dynamometer support (16) is mounted on the magnetic powder dynamometer fixing seat (7) by bolts. The magnetic powder dynamometer fixing seat (7) is mounted on the dynamometer workbench (6) at the top of the dynamometer mounting stand by T-bolts. The magnetic powder dynamometer controller (70) is integrated and installed inside the magnetic powder dynamometer (8); one end of the magnetic powder dynamometer controller (70) is connected to the magnetic powder dynamometer (8) via an electrical line, and the other end of the magnetic powder dynamometer controller (70) is connected to the J5.3 interface of the programmable controller (64) in the operating console (14) via an electrical line.

6. According to the electromagnetic clutch reliability test device of claim 1, Features The displacement sensor assembly (34) includes a displacement sensor (49) and a displacement sensor fixing seat (48), the temperature sensor assembly (33) includes a temperature sensor (50) and a temperature sensor fixing frame (51), and the torque sensor assembly includes a torque sensor (26) and a torque sensor supporting seat (17); The displacement sensor (49) is installed on the inner side of the left wall of the temperature and humidity test box (2) by using a displacement sensor fixing seat (48), the temperature sensor (50) is installed on the upper part of the temperature sensor fixing frame (51), the temperature sensor fixing frame (51) is fixed on the simulation workbench (29) through its bottom end and using T-shaped bolts (31), the torque sensor (26) is installed on the simulation workbench (29) through a torque sensor supporting seat (17) and using T-shaped bolts, and the vibration sensor (22) is installed on the top of the bearing support (23) by using a threaded connection.

7. According to the electromagnetic clutch reliability test device of claim 1, Features , the detection system and the data acquisition card (63) in the operating table (14) are connected by wire: The detection system further comprises a displacement sensor (49), a temperature sensor (50), a torque sensor (26) and a vibration sensor (22); The displacement sensor (49) is a displacement sensor of model LJ-V7080, and the displacement sensor (49) is connected to the acquisition interface line of the analog signal channel 4 of the data acquisition card (63) in the operating table (14); the temperature sensor (50) is an infrared thermometer of model YTDZAS, and the temperature measurement range is -30°C to 500°C, and the temperature sensor (50) is connected to the acquisition interface line of the analog signal channel 5 of the data acquisition card (63); the torque sensor (26) is a rotation speed sensor of model ZJ-20A, and the torque sensor (26) is connected to the acquisition interface line of the analog signal channel 3 of the data acquisition card (63); the vibration sensor (22) is a vibration sensor of model VB-451SCB, and the vibration sensor (22) is connected to the acquisition interface line of the analog signal channel 2 of the data acquisition card (63); the digital display voltmeter (13) is connected to the acquisition interface line of the analog signal channel 1 of the data acquisition card (63).

8. According to the electromagnetic clutch reliability test device of claim 1, Features The operating table (14) includes a box, a system operation light (52), a system operation button (53), a system stop light (54), a system stop button (55), a keyboard and a mouse (56), a display (57), a loading operation button (58), a loading stop button (59), a reset button (60), an emergency stop button (61), a computer (62), a data acquisition card (63), a programmable controller (64) and a multi-core plug (67); The keyboard and mouse (56) are installed on the upper end surface of the extended part of the box, and the electrical wires thereof are connected to the USB interface of the computer (62). The display (57) is a 275S1E liquid crystal display, and the display (57) is installed on the inclined surface of the upper part of the box. The display (57) is connected to the display interface of the computer (62) through an HDMI cable; the data acquisition card (63) is a PCI-1255 data acquisition card, and the data acquisition card (63) is installed in the mainboard card slot of the computer (62); the programmable controller (64) is a PMAC-Lite programmable controller of the American Deltu brand, and the programmable controller (64) is installed inside the computer; the multi-core plug (67) is a small multi-core plug of the Misumi brand Dsub series, and a 12-core multi-core plug is selected and installed inside the computer (62); The J4 interface of the programmable controller (64) is connected to the 1394 interface of the mainboard of the computer (62); the J5.1 interface of the programmable controller (64) is connected to the vibration loading platform controller (68) built into the vibration loading platform (1); the J5.2 interface of the programmable controller (64) is connected to the temperature and humidity test chamber controller (69) built into the temperature and humidity test chamber (2); the J5.3 interface of the programmable controller (64) is connected to the magnetic powder dynamometer controller (70) built into the magnetic powder dynamometer (8); and the J5.4 interface of the programmable controller (64) is connected to the built-in encoder (65) of the servo motor (28); One end of the electrical wire of the multi-core plug (67) is connected to the J5 interface of the programmable controller (64), and the other end of the electrical wire is connected to each input end of the multi-core plug (67) as an input device, and each input end of the multi-core plug (67) is connected to each switch button: The input end I0.0 interface of the multi-core plug (67) is connected to the 1 interface of the system operation button (53) by an electrical wire; The input end I0.1 interface of the multi-core plug (67) is connected to the 1 interface of the system stop button (55) by an electrical line; The input end I0.2 interface of the multi-core plug (67) is connected to the 1 interface of the load operation button (58) by an electrical wire; The input end I0.3 interface of the multi-core plug (67) is connected to the I interface of the loading stop button (59) by an electrical wire; The input terminal I0.4 interface of the multi-core plug (67) is connected to the I interface of the reset button (60) by an electrical wire. The input end I0.5 interface of the multi-core plug (67) is connected to the I interface of the emergency stop button (61) by an electrical wire; The output end O2.0 interface of the multi-core plug (67) is connected to the X1 interface of the system operation light (52) by an electrical wire. The output end O2.1 interface of the multi-core plug (67) is connected to the X1 interface of the system stop light (54) by an electrical line.

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