Digital intelligence on-load fatigue abrasion platform

Abstract

The invention relates to a digital intelligent on-load fatigue wear platform, which belongs to the technical field of testing devices and comprises a three-phase asynchronous variable-frequency motor electrically connected with a control cabinet. A gearbox body is provided with a grounding fixing flange, at least one connecting shaft is arranged in the gearbox body, the grounding fixing flange is arranged outside the connecting shaft in a sleeving mode, the connecting shaft is in transmission connection with the three-phase asynchronous variable frequency motor, and when the grounding device to be tested is fixedly connected to the grounding fixing flange, the end face of the connecting shaft and a friction conductive block of the grounding device to be tested are pressed tightly. The adjustable current source is electrically connected with the to-be-tested grounding device through the connecting shaft and is used for adjusting output current flowing through the to-be-tested grounding device; the touch screen is installed on one side of the outer portion of the trolley, electrically connected with the control cabinet and used for adjusting the input frequency of the three-phase asynchronous variable frequency motor, the functions of instruction sending, data real-time collecting and displaying, data copying and refreshing emptying are achieved through the touch screen, and the man-machine interaction function is well achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of testing devices, and in particular to a digitalized loaded fatigue wear platform. Background Art

[0002] The grounding device in the rail transit industry is installed at the end of the train bogie axle, and the rotation of the train bogie axle provides power to make the grounding device internally conductive through friction. Due to the large number of vehicle models in the industry and the diverse and complex working conditions, there is currently a lack of a fatigue grounding device wear test bench that can adapt to different vehicle models and realize digital control.

[0003] The existing test bench cannot realize digital control, cannot adjust the load current of the grounding device, and lacks human-computer interaction functions that can realize start and stop, command sending, real-time data acquisition and display, data copying and refresh and clearing. Summary of the invention

[0004] In view of the shortcomings existing in the relevant technologies, the purpose of the present invention is to provide a digital on-load fatigue wear platform to solve the technical problems that the prior art cannot realize digital control, cannot adjust the load current of the grounding device, and lacks human-computer interaction functions that can realize start and stop, command sending, real-time data acquisition and display, data copying and refresh and clearing.

[0005] The present invention provides a digitalized load-bearing fatigue wear platform, comprising:

[0006] Control cabinet;

[0007] A three-phase asynchronous variable frequency motor electrically connected to the control cabinet;

[0008] A gearbox, a grounding fixing flange is provided on the box body, at least one connecting shaft is provided inside the box body, the grounding fixing flange is sleeved outside the connecting shaft, the connecting shaft is drivingly connected to the three-phase asynchronous variable frequency motor, wherein when the grounding device to be tested is fixedly connected to the grounding fixing flange, the end face of the connecting shaft is pressed tightly against the friction conductive block of the grounding device to be tested;

[0009] A trolley, wherein the control cabinet and the three-phase asynchronous variable frequency motor are installed inside the trolley, and the gearbox is installed on the trolley and is located on the upper part of the three-phase asynchronous variable frequency motor;

[0010] An adjustable current source, electrically connected to the grounding device to be tested via a connecting shaft, and used to adjust the output current flowing through the grounding device to be tested by adjusting the current value of the adjustable current source;

[0011] A touch screen is installed on one side of the outside of the trolley and is electrically connected to the control cabinet, and includes a frequency converter control interface for adjusting the input frequency of the three-phase asynchronous variable frequency motor.

[0012] The embodiment of the present invention realizes the movement and various functions of the on-load fatigue wear equipment by setting up a complete set of mechanical transmission structure, electrical power supply and control logic. Through the technical application of the on-load fatigue wear equipment, a set of mechatronic equipment that can be controlled by a touch screen is developed. The friction between the friction conductive blocks of the connecting shaft end face and the grounding device is simulated to simulate the wear of the grounding device during the operation of the high-speed railway. The input frequency of the motor can be adjusted at any time on the inverter control interface of the touch screen, and different speed conditions can be simulated.

[0013] In some embodiments of the present invention, the gearbox further includes: a synchronous pulley 1 fixedly connected to the connecting shaft, the synchronous pulley 1 is connected to a synchronous pulley 2 via a synchronous belt, the synchronous pulley 2 is connected to the three-phase asynchronous variable frequency motor, wherein the synchronous belt is tensioned by a tensioning pulley.

[0014] In some embodiments of the present invention, the box body includes: a gearbox bracket fixedly installed above the outside of the trolley, the gearbox bracket fixedly installed with a bearing vertical plate and a vertical plate, wherein the gearbox bracket has a through groove for connecting to the three-phase asynchronous frequency conversion motor from the inside of the box body through the synchronous belt.

[0015] In some embodiments of the present invention, the connecting shaft, the synchronous pulley 1 and the tensioning wheel are located in a containing space formed by the gearbox bracket, the bearing vertical plate and the vertical plate.

[0016] In some embodiments of the present invention, the gearbox further includes: a rotation speed sensor is installed on the vertical plate, and the rotation speed sensor is electrically connected to the touch screen for converting the rotation speed into an electrical signal and outputting it to the touch screen.

[0017] In some embodiments of the present invention, the gearbox further includes: a speed measuring gear fixedly mounted on the connecting shaft, the speed measuring gear being connected to the speed sensor and being used to measure the speed of the connecting shaft and transmit the speed to the speed sensor.

[0018] In some embodiments of the present invention, the touch screen further comprises: reading the electrical signal transmitted to the touch screen through a programmable logic control program, and converting the electrical signal into a digital signal for display.

[0019] In some embodiments of the present invention, a temperature sensor is provided in the grounding device, and the temperature sensor is electrically connected to the control cabinet and is used to read the temperature of the grounding device to be tested.

[0020] The embodiment of the present invention reads various wear state parameters in real time through touch screen control, and converts the electrical signals into digital signals through programmable logic control program software, thereby realizing data reading, storage and high temperature judgment and identification protection.

[0021] In some embodiments of the present invention, the touch screen further includes: a data curve interface for observing the temperature change trend of the grounding device to be tested under different rotation speeds and current conditions.

[0022] In some embodiments of the present invention, the control cabinet further includes: a cabinet body, a guide rail riveted on the cabinet body, and a frequency converter, a motor protector, a switch control device and a PLC controller are installed on the guide rail.

[0023] The beneficial effects of the present invention are:

[0024] 1. It can adapt to grounding devices with different interfaces, adapt to a variety of train models and speeds, simulate the load current working conditions of train grounding devices, and realize load fatigue wear tests of grounding devices of different specifications by replacing different tooling. It has high reliability and strong versatility.

[0025] 2. Real-time collection of the rotation speed, current and temperature of the grounding device during the wear process, and save the collected data in real time in units of minutes, and the test data can be exported after each test.

[0026] 3. The touch screen can be used to send commands, collect and display data in real time, copy data, and refresh and clear data, thus realizing the human-computer interaction function.

[0027] 4. It has the function of over-temperature shutdown, which can effectively avoid excessive temperature caused by abnormal wear and tear, and burnt equipment or products. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic diagram of the structure of a digitalized load-bearing fatigue wear platform provided by an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the structure of a gearbox provided by an embodiment of the present invention;

[0031] Figure 3 A cross-sectional view of a gearbox provided in an embodiment of the present invention;

[0032] Figure 4A schematic diagram of the structure of a control cabinet provided in an embodiment of the present invention;

[0033] Figure 5 A circuit diagram of an adjustable current source, a connecting shaft and a grounding device provided in an embodiment of the present invention;

[0034] Figure 6 A display diagram of a touch screen provided in an embodiment of the present invention.

[0035] In the figure:

[0036] 1. Trolley; 2. Touch screen; 3. Gearbox; 4. Three-phase asynchronous variable frequency motor; 5. Control cabinet; 6. Adjustable current source; 7. Grounding fixing flange; 8. High-speed rail shaft transition plate; 9. Synchronous belt; 10. Tensioner; 11. Connecting shaft; 12. Bearing vertical plate; 13. Vertical plate; 14. Deep groove ball bearing; 15. Speed ​​sensor; 16. Gearbox bracket; 17. Bearing cover; 18. Synchronous pulley one; 19. Speed ​​measuring gear; 20. Control cabinet; 21. Cabinet door; 22. Frequency converter; 23. Guide rail; 24. Motor protector; 25. Fuse; 26. Circuit breaker; 27. Contactor; 28. Power module; 29. ​​CPU module; 30. Analog input module; 31. Hinge; 32. Synchronous pulley two. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0038] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0039] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0040] The technical solution of the present invention is described in detail below in conjunction with specific embodiments and the accompanying drawings.

[0041] As attached Figure 1 As shown, in a schematic embodiment of a digital on-load fatigue wear platform of the present invention, it includes: a trolley 1, a control cabinet 5 and a three-phase asynchronous variable frequency motor 4 are installed inside the trolley 1, the three-phase asynchronous variable frequency motor 4 is electrically connected to the control cabinet 5, and a gearbox 3 is installed on the trolley and located on the upper part of the three-phase asynchronous variable frequency motor 4; a touch screen 2 is also installed on one side of the outside of the trolley 1, the touch screen 2 is electrically connected to the control cabinet 5, and an adjustable current source 6 is independently placed next to the trolley 1.

[0042] Combined with reference Figure 2 As shown, the adjustable current source 6 is electrically connected to the grounding device to be tested through the connecting shaft 11, and is used to adjust the output current flowing through the grounding device to be tested by adjusting the current value of the adjustable current source 6;

[0043] A grounding fixing flange 7 is provided on the box body of the gearbox 3, and at least one connecting shaft 11 is provided inside the box body. The grounding fixing flange 7 is sleeved on the outside of the connecting shaft 11, and the connecting shaft 11 is drivingly connected to the three-phase asynchronous variable frequency motor 4. When the grounding device to be tested is fixedly connected to the grounding fixing flange 7, the end face of the connecting shaft 11 is pressed against the friction conductive block of the grounding device to be tested, and a high-speed rail shaft transition plate 8 is also fixed on the connecting shaft 11, which is used to fix the friction plate in the grounding device to be tested when the end face of the connecting shaft 11 is pressed against the friction conductive block of the grounding device to be tested;

[0044] A synchronous pulley 18 is fixedly connected to the connecting shaft 11, and the synchronous pulley 18 is connected to the synchronous pulley 2 32 through the synchronous belt 9, and the synchronous pulley 2 32 is connected to the three-phase asynchronous variable frequency motor 4, wherein the synchronous belt 9 is tensioned by the tensioning wheel 10;

[0045] Furthermore, a gearbox bracket 16 is fixedly installed on the upper part of the outside of the trolley 1, and a bearing vertical plate 12 and a vertical plate 13 are fixedly installed on the gearbox bracket 16. The gearbox bracket 16 has a through groove, which is used to be connected to the three-phase asynchronous variable frequency motor 4 from the inside of the box through a synchronous belt 9, wherein the connecting shaft 11, a synchronous pulley 18 and a tensioning wheel 10 are located in the accommodating space formed by the gearbox bracket 16, the bearing vertical plate 12 and the vertical plate 13, and a speed sensor 15 is installed on the vertical plate 13. The speed sensor 15 is electrically connected to the touch screen 2 and is used to convert the speed into an electrical signal and output it to the touch screen 2. A speed measuring gear 19 is also fixedly installed on the connecting shaft 11, and the speed measuring gear 19 is connected to the speed sensor 15, and is used to measure the speed of the connecting shaft 11 and transmit the speed to the speed sensor 15;

[0046] When the wear platform device is started, the synchronous pulley 2 32 on the output shaft of the three-phase asynchronous variable frequency motor 4 distributes power to the synchronous pulley 18 and the connecting shaft 11 at a transmission ratio of 1:1 through the synchronous belt 9. The end face of the connecting shaft 11 rubs against the friction conductive block of the grounding device to be tested, simulating the wear of the grounding device during the operation of the high-speed railway.

[0047] Based on the above structure, the digital on-load fatigue wear platform of the embodiment of the present application realizes the movement and various functions of the on-load fatigue wear equipment by setting up a complete set of mechanical transmission structure, electrical power supply and control logic. Through the technical application of the on-load fatigue wear equipment, a set of mechatronic equipment that can be controlled by a touch screen is developed.

[0048] Reference Figure 3 As shown, it should be noted that the bearing cover 17 is connected to the bearing vertical plate 12 , and the connecting shaft 11 is installed on the bearing vertical plate 12 through a deep groove ball bearing 14 .

[0049] In some embodiments of the present invention, a temperature sensor is provided in the grounding device to be tested. The temperature sensor is electrically connected to the control cabinet 5 and is used to read the temperature of the grounding device to be tested.

[0050] Reference Figure 4 As shown, the control cabinet includes: a cabinet body 20, a cabinet door 21 is connected to the cabinet body 20 through a hinge 31, a guide rail 23 is riveted to the cabinet body 20, and a frequency converter 22, a motor protector 24, a switch control device and a PLC controller are installed on the guide rail 23, wherein the switch control device includes a fuse 25, a circuit breaker 26 and a contactor 27; the PLC controller includes a power module 28, a CPU module 29 and an analog input module 30.

[0051] Reference Figure 5 As shown, the current conducted in the grounding device to be tested is provided by the adjustable current source 6. The adjustable current source 6, the connecting shaft 11 and the grounding device to be tested form a complete electrical circuit. By adjusting the current value on the operating panel of the adjustable current source 6, the output current flowing through the grounding device to be tested can be adjusted.

[0052] It should be noted that the current adjustment range of the adjustable current source 6 is 0-800A.

[0053] Combined with reference Figure 6 As shown, the touch screen 2 includes a frequency converter control interface, a data acquisition interface and a data curve interface. The touch screen 2 reads the electrical signal transmitted to the touch screen 2 through a programmable logic control program, and converts the electrical signal into a digital signal for display, thereby realizing data reading, storage and high temperature judgment and identification protection.

[0054] Among them, the three-phase asynchronous variable frequency motor 4 adopts a 2-level variable frequency motor, the AC frequency is 50Hz, and the rated speed is 2950rpm. The input frequency of the three-phase asynchronous variable frequency motor 4 can be adjusted at any time on the inverter control interface of the touch screen 2 to simulate different speed conditions. On the data curve interface of the touch screen 2, the temperature change trend of the grounding device to be tested under different speeds and current conditions can be observed.

[0055] Furthermore, the touch screen 2 is also provided with a USB interface, and the storage device is connected to the USB interface. By clicking data copy on the inverter control interface, the temperature, speed and current data can be saved in the storage device in the form of a data table.

[0056] It should be noted that the above is a reference method for the digitalized load-bearing fatigue wear platform, and the present invention is not limited thereto.

[0057] The embodiments of the present invention realize a grounding device that can adapt to different interfaces, adapt to a variety of train models and speeds, simulate the load current working conditions of the train grounding device, and realize load fatigue wear tests of grounding devices of different specifications by replacing different tooling. It has high reliability and strong versatility, and can collect the speed, current and temperature of the grounding device in real time during the wear process, and save the collected data in real time in units of minutes. The test data can be exported after each test. The touch screen can realize command sending, real-time data collection and display, data copying and refresh and clearing functions, and well realizes the human-computer interaction function. It has a temperature over-temperature shutdown function, which can effectively avoid excessive temperature caused by abnormal wear and burnt equipment or products, and solves the technical problems that the prior art cannot realize digital control, cannot adjust the load current of the grounding device, and lacks the human-computer interaction functions that can realize start and stop, command sending, real-time data collection and display, data copying and refresh and clearing.

[0058] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0059] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A digital load-bearing fatigue wear platform, characterized in that: include: Control cabinet; A three-phase asynchronous variable frequency motor electrically connected to the control cabinet; A gearbox, a grounding fixing flange is provided on the box body, at least one connecting shaft is provided inside the box body, the grounding fixing flange is sleeved outside the connecting shaft, the connecting shaft is drivingly connected to the three-phase asynchronous variable frequency motor, wherein when the grounding device to be tested is fixedly connected to the grounding fixing flange, the end face of the connecting shaft is pressed tightly against the friction conductive block of the grounding device to be tested; A trolley, wherein the control cabinet and the three-phase asynchronous variable frequency motor are installed inside the trolley, and the gearbox is installed on the trolley and is located on the upper part of the three-phase asynchronous variable frequency motor; An adjustable current source, electrically connected to the grounding device to be tested via a connecting shaft, and used to adjust the output current flowing through the grounding device to be tested by adjusting the current value of the adjustable current source; A touch screen is installed on one side of the outside of the trolley and is electrically connected to the control cabinet, and includes a frequency converter control interface for adjusting the input frequency of the three-phase asynchronous variable frequency motor.

2. The digitalized load-bearing fatigue wear platform according to claim 1 is characterized in that: The gearbox further includes: a synchronous pulley 1 fixedly connected to the connecting shaft, the synchronous pulley 1 is connected to a synchronous pulley 2 via a synchronous belt, the synchronous pulley 2 is connected to the three-phase asynchronous variable frequency motor, wherein the synchronous belt is tensioned by a tensioning pulley.

3. The digitalized load-bearing fatigue wear platform according to claim 2 is characterized in that: The box body includes: a gearbox bracket fixedly installed above the outside of the trolley, the gearbox bracket fixedly installed with a bearing vertical plate and a vertical plate, wherein the gearbox bracket has a through groove for connecting to the three-phase asynchronous frequency conversion motor from the inside of the box body through the synchronous belt.

4. The digitalized load-bearing fatigue wear platform according to claim 3 is characterized in that: The connecting shaft, the synchronous pulley 1 and the tensioning wheel are located in a containing space formed by the gearbox bracket, the bearing vertical plate and the vertical plate.

5. The digitalized load-bearing fatigue wear platform according to claim 3 is characterized in that: The gearbox further includes: a rotation speed sensor installed on the vertical plate, the rotation speed sensor is electrically connected to the touch screen, and is used to convert the rotation speed into an electrical signal and output it to the touch screen.

6. The digitalized load-bearing fatigue wear platform according to claim 5 is characterized in that: The gearbox further includes: a speed measuring gear fixedly mounted on the connecting shaft, the speed measuring gear being connected to the speed sensor and being used for measuring the speed of the connecting shaft and transmitting the speed to the speed sensor.

7. The digitalized load-bearing fatigue wear platform according to claim 5 is characterized in that: The touch screen further includes: a data acquisition interface, which is used to read the electrical signal transmitted to the touch screen through a programmable logic control program, and convert the electrical signal into a digital signal for display.

8. The digitalized load-bearing fatigue wear platform according to claim 1 is characterized in that: The grounding device to be tested is provided with a temperature sensor, which is electrically connected to the control cabinet and is used to read the temperature of the grounding device to be tested.

9. The digitalized load-bearing fatigue wear platform according to claim 8 is characterized in that: The touch screen further comprises: a data curve interface for observing the temperature variation trend of the grounding device to be tested under different rotation speeds and current conditions.

10. The digitalized load-bearing fatigue wear platform according to claim 1 is characterized in that: The control cabinet further comprises: a cabinet body, a guide rail is riveted on the cabinet body, and a frequency converter, a motor protector, a switch control device and a PLC controller are installed on the guide rail.

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