Contact line current-carrying friction and wear experimental device and control method thereof

Abstract

The present invention relates to a contact line current-carrying friction and wear experimental device and a control method thereof, and belongs to the technical field of experimental test equipment. It includes a bow-net current-carrying friction and wear experimental system and an environmental simulation system. The bow-net current-carrying friction and wear experimental system includes a support plate, a movable bracket, a rotating table, a clamping piece and a lifting mechanism, and can simulate rigidly suspended and flexibly suspended contact lines. The environmental simulation system includes a mounting frame, an experimental cabin, a temperature and humidity adjustment mechanism, a normal load detection mechanism, a particle concentration adjustment mechanism, an arc monitoring mechanism, a contact line wear monitoring mechanism and a contact line temperature monitoring mechanism, and the environmental temperature, humidity and particle concentration in the experimental cabin are adjusted and recorded, so that the collection of the research parameters of the current-carrying friction and wear performance between the bow and the catenary is more specific and comprehensive.

Description

Technical Field

[0001] The invention relates to a contact line current-carrying friction and wear experimental device and a control method thereof, belonging to the technical field of experimental testing equipment. Background Art

[0002] In recent years, with the vigorous development of rail transit construction in my country, the development of high-quality rail transit accessories is regarded as a key step. And with the development of high-speed railway systems and sophisticated urban rail transit, the requirements for high-current-carrying and high-wear-resistant pantograph-net systems are getting higher and higher. Since the current-carrying friction and wear between the pantograph and the net is a relatively complex friction process, the contact line and the pantograph will not only be subject to mechanical wear, but also electrical wear and chemical wear, and the wear operation mechanism also belongs to the coupling effect of stress field-electric field-temperature field. Therefore, in the process of studying the current-carrying friction and wear between the contact line and the pantograph, it is necessary to consider a variety of parameter variables, including current, relative sliding speed, normal load and environmental influence.

[0003] There are two practical ways to install the contact network, namely rigid suspension and flexible suspension. Compared with rigid suspension, due to the tension, the contact line of flexible suspension will have a certain displacement under the action of the pantograph lifting force. And at the joints of each anchor section, it is easy to be impacted by the pantograph to form hard points, resulting in hard point wear. Most of the existing designs of pantograph and contact line current-carrying friction and wear testing machines are open or single experimental environments, and the predetermined parameters only control the change of contact pressure and relative sliding speed between the pantograph and the catenary.

[0004] A Chinese patent with patent publication number CN112067485A discloses a multifunctional current-carrying friction and wear experimental device and an operating method thereof, which includes a frame arranged on a base, a rotating assembly arranged on the frame, a rotating bracket arranged at the bottom of the rotating assembly, and a contact wire arranged at the bottom of the rotating bracket; a lifting assembly, a pressure detection assembly arranged on the lifting assembly, a clamping member arranged at the top of the pressure assembly, and a pantograph slider arranged on the clamping member are arranged on the base, and the pantograph slider is located below the contact wire; a gas environment simulation cabin is arranged on the base, and a data acquisition mechanism, a humidity regulating device, a temperature regulating device, an experimental gas regulating device and a pressure regulating device are arranged in the gas environment simulation cabin, and the experimental gas regulating device is used to inject different types of experimental gases; a control mechanism and a power supply connected to the control mechanism are arranged on the base.

[0005] The above patent solves the problems of the unchanged gas component ratio in the existing experimental environment and the expensive existing experimental equipment, and provides diversified data support for the study of current-carrying friction and wear performance; however, when simulating the contact between the pantograph and the contact line, the flexibility of the contact network and the impact effect of the anchor section joint are not considered. Therefore, the pantograph will produce a large experimental deviation after the hanging network experiment, and it has no monitoring function for the operation process of the device, and cannot be used to deeply explore the influence mechanism of wear.

[0006] At the same time, the current-carrying friction and wear testing machines are currently mainly used to study the pantograph slide, and there are few studies on the current-carrying friction and wear of the contact line. As a result, it is impossible to analyze the wear law of the contact line under different conditions, and thus it is impossible to develop and optimize the contact line with high conductivity, high strength and wear-resistant contact line.

[0007] Therefore, in order to solve the above background problems, a current-carrying friction and wear testing machine is developed that is close to the actual environment, creates random impact contact, and can collect various parameters of the current-carrying friction and wear on the contact line. This has important practical significance for the development of high-conductivity, high-strength and wear-resistant contact lines. Summary of the invention

[0008] The purpose of the present invention is to solve the problems raised in the above background issues and to provide a contact line current-carrying friction and wear experimental device and a control method thereof, which can simulate the pantograph-net damage mechanism of the contact line under rigid suspension and flexible suspension under the impact of the pantograph, and at the same time analyze the wear state of the contact line.

[0009] The object of the present invention is achieved as follows: a contact line current-carrying friction and wear test device, comprising a pantograph current-carrying friction and wear test system and an environmental simulation system;

[0010] The bow-net current-carrying friction and wear experimental system comprises a fixed truncated table, on which a plurality of movable brackets for contact line installation and adjustment are installed according to the law of vortex lines, a rotating table is also provided at the bottom of the fixed truncated table, and a lifting mechanism is also provided below the rotating table; the rotating table is installed concentrically with the fixed truncated table, and a clamping piece is also provided on the rotating table, and the clamping piece is connected to an electric converter through electric wires, and the electric converter serves as a current transfer device, and the other side of the electric converter is connected to a current controller through electric wires;

[0011] The environmental simulation system includes a mounting frame, an experimental chamber, a temperature and humidity adjustment mechanism, a normal load detection mechanism, a particle concentration adjustment mechanism, an arc monitoring mechanism, a contact wire wear monitoring mechanism and a contact wire temperature monitoring mechanism, and all the adjustment mechanisms and monitoring mechanisms are connected to a data conversion module and input into a terminal device.

[0012] The bottom of the rotating platform is connected to the rotating shaft of the variable frequency motor through a coupling;

[0013] The variable frequency motor is installed on the lifting mechanism;

[0014] The lifting mechanism includes electric push rods symmetrically arranged on both sides of the variable frequency motor, and a push plate is arranged between the two electric push rods; the two electric push rods are installed in parallel with the bottom of the push plate, and the change parameters of the two electric push rods are consistent, so as to keep the push plate horizontally moving up and down; the variable frequency motor is installed on the push plate and moves due to the up and down translation of the push plate; the rotating shaft of the variable frequency motor is connected to the rotating shaft of the rotating table through a coupling, and the rotation speed of the rotating table is changed by utilizing the different rotation speeds of the variable frequency motor.

[0015] The movable bracket includes a locking button, a fastening clamp, a support plate, a spring, a fastening plate, a feeding mechanism and a movable clamp;

[0016] The fastening plate is configured as a shell-type mechanism with a hollow interior, an opening at the top and a size of the opening smaller than the interior size; three springs are arranged in parallel inside the fastening plate, and the spring elasticity is selected according to the tension of the contact network;

[0017] The support plate is installed on the upper part of the spring and is restricted inside the fastening plate. A locking button for limiting the movement of the support plate is also provided on one side of the bottom of the support plate;

[0018] The fastening clamp is fixed on the support plate and changes as the support plate is subjected to spring bounce;

[0019] The movable clamping plate is connected to the feeding mechanism and is installed on the fastening clamping plate. In addition to being affected by the supporting plate, the gap between the two clamps can be changed according to the adjustment of the feeding mechanism.

[0020] The clamping member comprises a clamping plate, a pantograph slider, a locking bolt and a fastening plate;

[0021] The pantograph slider matches the shape set to the fixing position of the clamping plate and is placed in the clamping plate, and is provided with a fastening plate for fixing the pantograph slider;

[0022] The clamping member is fixedly mounted on the rotating platform by means of locking bolts.

[0023] The rotating table is also surrounded by high-transmittance tempered glass to prevent flying of debris during the wear test, so as to ensure the recovery and collection of the debris particles in the later stage. The high transparency ensures that the state changes during the bow-net matching process can be clearly understood from the outside.

[0024] The experimental cabin is set as a closed environment, including a cabin body, a sealing cover, quartz glass and an insulating sealing rubber ring;

[0025] The cabin is made of carbon steel, with hollow structures at both ends; the sealing cover is made of carbon steel, fastened to the front and rear ends of the cabin, with a small groove in the middle for placing a brass sealing ring; high-strength and high-transmittance quartz glass is sealed in the sealing cover to allow light to penetrate into the cabin;

[0026] The bottom of the cabin is also provided with an insulating sealing rubber ring for sealing the through hole through which the rotating shaft of the variable frequency motor passes; the small hole through which the rotating shaft of the variable frequency motor passes is sealed to ensure the sealing of the entire cabin as much as possible.

[0027] The temperature and humidity adjustment mechanism includes a sprayer, a heating plate and a temperature and humidity sensor; the sprayer is arranged at the upper part of the experimental cabin and connected to the water pipe, the heating plate is installed on both sides of the bottom of the experimental cabin to evenly adjust the temperature and dryness of the experimental cabin, and the experimental cabin is also provided with a temperature and humidity sensor for detecting temperature and humidity;

[0028] The normal load detection mechanism includes a pressure sensor for sensing the change in load pressure applied by the pantograph slider to the contact line, and the pressure sensor is installed between the clamp and the rotating table, and is zeroed after being tightened;

[0029] The particle concentration regulating mechanism comprises an aerosol generator, an air inlet pipe, an air outlet pipeline and a particle sensor for detecting the particle concentration; the aerosol generator is arranged on the periphery of the mounting frame, one end of the air inlet pipe is connected to the aerosol generator, and the other end is installed at the vent of the experimental cabin, and the air outlet pipeline is installed on the air outlet on the other side of the experimental cabin to maintain gas circulation in the experimental cabin;

[0030] The arc monitoring mechanism includes an arc detection device, which is connected to the bow-net current loop to detect the current change between the bow and the net, and outputs the arc energy through signal calculation;

[0031] The contact line wear monitoring mechanism comprises a high-speed CCD camera; the high-speed CCD camera is installed at a side position parallel to the contact line installation position, and takes pictures of the pantograph and the catenary during the friction fit process, and after taking pictures, a data processing unit is used to perform comparative analysis to calculate the contact line wear amount at different times;

[0032] The contact line temperature monitoring mechanism includes an infrared temperature sensor; the infrared temperature sensor is installed at one end of the experimental cabin and converts the optical signal into a digital signal and transmits it to the terminal device.

[0033] A current controller for transmitting current between the bow and the catenary is arranged on the side of the experimental cabin, and a current monitor is matched and arranged in the loop.

[0034] The terminal device comprises an operation unit signal processing module, a signal output module and a data transmission module.

[0035] A control method for a contact line current-carrying friction and wear experimental device comprises the following steps:

[0036] Step 1: Clamp the contact wire onto the movable clamping plate according to the installation shape of the movable bracket. According to the experimental requirements, open the locking button in the flexible contact network mode and close the locking button in the rigid contact network mode. After fastening the contact wire, proceed to step 2.

[0037] Step 2: Close the test chamber, input air into the chamber through the aerosol generator, set the particle concentration coefficient, use the particle sensor to feedback the particle concentration in the test chamber, and adjust the air components input by the aerosol generator. At the same time, keep the air outlet and air filter unobstructed, and after maintaining the gas flow in the test chamber, proceed to step 3;

[0038] Step 3: Set the temperature and humidity in the test chamber, turn on the sprayer and heating plate, and control the heating plate power and sprayer flow rate through the data feedback from the temperature and humidity sensors. After the air temperature and humidity in the test chamber remain relatively stable, proceed to step 4;

[0039] Step 4: Set the normal pressure value between the pantograph slider and the contact wire, use the electric push rod to raise the height of the pantograph slider, and control the movement of the electric push rod by acting on the pressure sensor through the reverse force. After the normal contact force between the pantograph and the catenary is stable, the electric push rod stops moving and enters step 5;

[0040] Step 5: Determine the current form and size according to the experimental requirements, and control the current controller to output the corresponding current value. After keeping the current output relatively stable, the output current remains unchanged and proceed to step 6;

[0041] Step 6: Set the speed of the variable frequency motor to drive the slider to rotate at high speed. After the pantograph slider and the contact line 6 maintain stable operation, all components maintain stable operation, and enter step 7;

[0042] Step 7: During the stable friction process between the pantograph and the catenary, the current parameters between the pantograph and the catenary are collected through the real-time current changes on the current controller, and the arc generated between the pantograph and the catenary is determined based on the changes in current intensity; the high-speed CCD camera 18 takes photos of the relative friction process between the pantograph slider and the contact wire, and calculates the real-time wear of the pantograph slider and the contact wire through the background image processing algorithm; the infrared temperature sensor takes infrared pictures of the marked point position of the contact wire, and uses the background image algorithm to record the real-time temperature parameters;

[0043] Step 8: When the operating parameters need to be changed after the experiment, repeat steps 1 to 7, download and save the collected parameters, clear them and start recording again;

[0044] Step 9: Post-processing: clean the wear debris in the rotating table.

[0045] Compared with the prior art, the present invention has the following advantages:

[0046] The contact line current-carrying friction and wear test device of the present invention has a relatively closed and independent operating environment, and is uniformly controlled by external parameter settings. The coordination behavior between the bow and the catenary in a closed environment will not cause any accidental harm to the human body.

[0047] The contact line current-carrying friction and wear test device of the present invention can realize the rapid transformation of the contact line installation mode, obtain the current-carrying friction and wear state data between the rigid contact network and the flexible contact network and the carbon slide plate, and can simulate the load impact change when the contact network between different anchor sections intersects during the relative sliding process of the vortex-shaped contact line and the pantograph slider, so as to provide parameter basis for the diversified current-carrying friction performance;

[0048] A contact wire current-carrying friction and wear experimental device of the present invention is provided with a variety of data acquisition units, which record the ambient temperature, humidity and particle concentration in the experimental cabin and make corresponding adjustments, and record the change of the current between the bow and the catenary, so as to monitor the generation of electric arc in the process of bow-catenary coordination; and compared with the existing patented device, the present invention can realize the real-time calculation of the wear of the contact wire and the slider and the contact network temperature, and provide data basis for the current-carrying friction and wear mechanism of the bow and the catenary; at the same time, the high-transmittance tempered glass can block the flying of wear debris, retain the wear debris particles in the carrying process, and provide data reference for the damage mechanism in the process of current-carrying friction and wear of the bow and the catenary. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 The present invention is a schematic diagram of the overall structure of a contact line current-carrying friction and wear experimental device.

[0050] Figure 2 The present invention is a schematic diagram of the structure of an experimental chamber of a contact line current-carrying friction and wear experimental device.

[0051] Figure 3 The present invention is a component assembly diagram of a contact wire installation fixture of a contact wire current-carrying friction and wear test device.

[0052] Figure 4 The present invention is a top view of the cooperation between the pantograph slider and the contact wire of a contact wire current-carrying friction and wear test device.

[0053] Figure 5 The present invention is a flow chart of a control method of a current-carrying friction and wear testing machine of a contact line current-carrying friction and wear testing device.

[0054] The following are: 1. Mounting frame; 2. Experimental cabin; 201. Cabin body; 202. Sealing cover; 203. Quartz glass; 204. Insulating sealing rubber ring; 3. Locking device; 4. Fixed round table; 5. Movable bracket; 501. Locking button; 502. Fastening clamp; 503. Support plate; 504. Spring; 505. Fastening plate; 506. Feed mechanism; 507. Movable clamp; 6. Contact wire; 7. Push plate; 8. Frequency conversion motor; 9. Electric push rod; 10. Rotating table; 11. Coupling; 12. Clamping piece; 1201. Clamping plate; 1202. Pantograph slider; 1203. Locking bolt; 1204. Fastening plate; 13. High-transmittance tempered glass; 14. Aerosol generator; 15. Current controller; 16. Air inlet duct; 17. Temperature and humidity sensor; 18. High-speed CCD camera; 19. Electric wires; 20. Sprayer; 21. Pressure sensor; 22. Infrared temperature sensor; 23. Electric converter; 24. Particle sensor; 25. Heating plate; 26. Air outlet; 27. Terminal device; 271. Operating unit; 272. Signal processing module; 273. Signal output module; 274. Data transmission module. DETAILED DESCRIPTION

[0055] The present invention is described below in conjunction with the accompanying drawings and specific embodiments:

[0056] like Figures 1 to 5 As shown, a contact line current-carrying friction and wear experimental device includes a bow-cattenary current-carrying friction and wear experimental system and an environmental simulation system;

[0057] The bow-cat current-carrying friction and wear experimental system comprises a fixed truncated table 4, on which a plurality of movable brackets 5 are installed according to the law of vortex lines, for installation and adjustment of the contact line 6;

[0058] A rotating platform 10 is also provided at the bottom of the fixed truncated table 4, and a lifting mechanism is also provided below the rotating platform 10; the rotating platform 10 is installed concentrically with the fixed truncated table 4, and a clamping member 12 is also provided on the rotating platform 10, and the clamping member 12 is connected to an electric converter 23 through an electric wire 19, and the electric converter 23 is used as a current transfer device, and the other side of the electric converter 23 is connected to a current controller 15 through an electric wire 19;

[0059] The environmental simulation system includes a mounting frame 1, an experimental chamber 2, a temperature and humidity adjustment mechanism, a normal load detection mechanism, a particle concentration adjustment mechanism, an arc monitoring mechanism, a contact wire wear monitoring mechanism and a contact wire temperature monitoring mechanism, and all the adjustment mechanisms and monitoring mechanisms are connected to a data conversion module and input into a terminal device.

[0060] In this embodiment, the bottom of the rotating table 10 is connected to the rotating shaft of the variable frequency motor 8 through a coupling 11; the variable frequency motor 8 is installed on the lifting mechanism; the lifting mechanism includes electric push rods 9 symmetrically arranged on both sides of the variable frequency motor 8, and a push plate 7 is arranged between the two electric push rods 9; an electric converter 22 is installed at the rotating shaft position of the variable frequency motor 8, which is connected to the wire 19 as a current transfer device, and stably transmits the current to the clamping member 12 during the rotation process;

[0061] Two electric push rods 9 are installed parallel to the bottom of the push plate 7, and the change parameters of the two electric push rods 9 are consistent, so as to keep the push plate 7 horizontally moving up and down; the frequency conversion motor 8 is installed on the push plate and moves due to the up and down translation of the push plate 7; the rotating shaft of the frequency conversion motor 8 is connected to the rotating shaft of the rotating table 10 through a coupling, and the speed of the rotating table is changed by rotating the frequency conversion motor at different speeds.

[0062] In this embodiment, the top of the fixed truncated table 4 is connected to the locker 3 via a connecting rod, and the locker 3 can be used to further control the start and stop of the rotation of the fixed truncated table 4.

[0063] In this embodiment, the rotating table 10 is also surrounded by high-transmittance tempered glass 13 to prevent the flying of wear debris during the wear test to ensure the recovery and collection of wear debris particles in the later stage. The high transmittance ensures that the state changes during the bow-net matching process can be clearly understood from the outside.

[0064] like Figure 2 As shown, in this embodiment, the experimental chamber 2 is set as a closed environment, including a chamber body 201, a sealing cover 202, quartz glass 203 and an insulating sealing rubber ring 204;

[0065] The cabin 201 is made of carbon steel, with hollow structures at both ends; the sealing cover is made of carbon steel, the sealing cover 202 is fastened to the front and rear ends of the cabin 201, and a small groove for placing a brass sealing ring is opened in the middle; high-strength and high-transmittance quartz glass 203 is sealed in the sealing cover to allow light to penetrate into the cabin;

[0066] The bottom of the cabin 201 is also provided with an insulating sealing rubber ring 204 for sealing the through hole through which the rotating shaft of the variable frequency motor 8 passes, so as to seal the small hole through which the rotating shaft of the variable frequency motor passes, thereby ensuring the sealing of the entire cabin as much as possible.

[0067] like Figure 3 As shown, in this embodiment, the movable bracket 5 includes a locking button 501, a fastening clamping plate 502, a support plate 503, a spring 504, a fastening plate 505, a feeding mechanism 506 and a movable clamping plate 507;

[0068] The fastening plate 505 is a shell-type mechanism with a hollow interior, an opening at the top and the size of the opening is slightly smaller than the internal size; three springs 504 are arranged in parallel inside the fastening plate, and the elasticity of the springs 504 is selected according to the tension of the contact network; the support plate 503 is installed on the upper part of the springs and is restricted by the interior of the fastening plate 505; the locking button 501 can be adjusted according to needs, and can be pressed to limit the movement of the support plate 503, and can be pulled out to restore the free movement of the support plate 503; the fastening clamp 502 is fixed on the support plate 503, and can only change with the support plate 503 being affected by the spring 504; the movable clamp 507 is connected to the feeding mechanism and installed on the fastening clamp 502. In addition to being affected by the support plate 503, the gap between the two clamps can be changed according to the adjustment of the feeding mechanism 506.

[0069] like Figure 4 As shown, in this embodiment, the clamping member 12 includes a clamping plate 1201, a pantograph slider 1202, a locking bolt 1203 and a fastening plate 1204;

[0070] The pantograph slider 1202 matches the shape of the fixing position of the clamping plate 1201 and is placed in the clamping plate 1201 , and is provided with a fastening plate 1204 for fixing the pantograph slider 1202 ; the clamping member 12 is fixedly mounted on the rotating platform by a locking bolt 1204 .

[0071] In this embodiment, the temperature and humidity adjustment mechanism includes a sprayer 20, a heating plate 25 and a temperature and humidity sensor 17; the sprayer 20 is arranged on the upper part of the experimental cabin 2 and is connected to the water pipe, and the heating plate 25 is installed on both sides of the bottom of the experimental cabin 2 to evenly adjust the temperature and dryness of the experimental cabin. The experimental cabin 2 is also provided with a temperature and humidity sensor 17 for detecting temperature and humidity; four sprayers 20 are installed on the upper part of the experimental cabin 2, and the humidity changes in the experimental environment simulation cabin 2 are controlled according to the requirements of the experimental environment and the combined action of the temperature and humidity sensor 17.

[0072] In this embodiment, the normal load detection mechanism includes a pressure sensor 21, which is installed between the clamp 12 and the rotating table 10, and is used to sense the load pressure change applied to the contact line 6 by the pantograph slider 1202, and is zeroed after tightening.

[0073] In this embodiment, the particle concentration regulating mechanism includes an aerosol generator 14, an air inlet pipe 16, an air outlet pipeline and a particle sensor 24 for detecting the particle concentration; the aerosol generator 14 is arranged on the periphery of the mounting frame 1, one end of the air inlet pipe 16 is connected to the aerosol generator 14, and the other end is installed at the ventilation port of the experimental cabin 2, and the air outlet pipeline is installed on the air outlet 26 on the other side of the experimental cabin 2 to maintain gas circulation in the experimental cabin; the air outlet end of the aerosol generator 14 is connected to the air inlet pipe 16, and the other end of the air inlet pipe 16 is installed at the air inlet at the upper end of the experimental cabin 2 to transport air containing particulate matter. At the same time, the position of the air inlet pipe 16 at the rear upper end can ensure that the particulate air can be evenly distributed throughout the experimental environment simulation cabin 2, and will not float in only a part of the area due to sedimentation.

[0074] In this embodiment, the arc monitoring mechanism includes an arc detection device, and an arc detection device for detecting current changes between the bow and the catenary is connected to the bow-catenary current loop, and the magnitude of the arc energy is output through signal calculation;

[0075] In this embodiment, the contact line wear monitoring mechanism includes a high-speed CCD camera 18; the high-speed CCD camera 18 is installed at a side position parallel to the contact line installation position to take pictures of the pantograph and catenary during the friction fit process; a data processing unit is used to perform comparative analysis to calculate the contact line wear at different times;

[0076] In this embodiment, the contact line temperature monitoring mechanism includes an infrared temperature sensor 22 ; the infrared temperature sensor 22 is installed at one end of the experimental chamber 2 , and converts the optical signal into a digital signal and transmits it to the terminal device 27 .

[0077] In this embodiment, a current controller 15 for transmitting current between the bow and the catenary is arranged beside the experimental cabin 2, and a current monitor 28 is matched and arranged in the loop.

[0078] In this embodiment, the terminal device 27 includes an operation unit 271 , a signal processing module 272 , a signal output module 273 and a data transmission module 274 .

[0079] like Figure 5 As shown, a control method for a contact line current-carrying friction and wear experimental device comprises the following steps:

[0080] Step 1: Install the contact wire 6 according to the installation shape of the movable bracket 5, that is, according to the law of the vortex line, and clamp it on the movable clamping plate 507. According to the experimental requirements, open the locking button 501 in the flexible contact network mode and close the locking button 501 in the rigid contact network mode. After fastening the contact wire 6, proceed to step 2;

[0081] Step 2: Close the test chamber, input air into the test chamber 2 through the aerosol generator 14, set the particle concentration coefficient, use the particle sensor 24 to feedback the particle concentration in the test chamber 2, and adjust the air components input by the aerosol generator 14. At the same time, keep the air outlet and air filter unobstructed, and after maintaining the gas flow in the test chamber 2, proceed to step 3;

[0082] Step 3: Set the temperature and humidity in the experimental chamber 2, turn on the sprayer 20 and the heating plate 25, and control the power of the heating plate 25 and the flow rate of the sprayer 20 through the data feedback of the temperature and humidity sensor 17. After the air temperature and humidity in the experimental chamber remain relatively stable, proceed to step 4;

[0083] Step 4: Set the normal pressure value between the pantograph slider 1202 and the contact wire 6, use the electric push rod 9 to raise the height of the pantograph slider 1202, and control the movement of the electric push rod 9 by acting on the pressure sensor 21 through the reverse force. After the normal contact force between the pantograph and the catenary is stable, the electric push rod 9 stops moving and enters step 5;

[0084] Step 5: Determine the current form and size according to the experimental requirements, and control the current controller 15 to output the corresponding current value. After keeping the current output relatively stable, the output current remains unchanged, and proceed to step 6;

[0085] Step 6: Set the speed of the variable frequency motor to drive the slider to rotate at high speed. After the pantograph slider 1202 and the contact line 6 maintain stable operation, all components maintain stable operation, and enter step 7;

[0086] Step 7: During the stable friction process between the pantograph and the catenary, the current parameters between the pantograph and the catenary are collected through the real-time current changes on the current controller 15; the high-speed CCD camera 18 takes photos of the relative friction process between the pantograph slider 1202 and the contact wire 6, and calculates the real-time wear of the pantograph slider 1202 and the contact wire 6 through the background image processing algorithm; the infrared temperature sensor 22 takes infrared pictures of the marked point positions of the contact wire, and uses the background image algorithm to record the real-time temperature parameters;

[0087] Step 8: When the operating parameters need to be changed after the experiment, repeat steps 1 to 7, download and save the collected parameters, clear them and start recording again;

[0088] Step nine: Post-processing, cleaning the wear debris in the rotating table 10.

[0089] In this embodiment, the practice of the above steps shows that the method of the present invention can realize the rapid transformation of the contact wire installation mode, obtain the current-carrying friction and wear state data between the rigid contact network and the flexible contact network and the carbon slide plate, and the vortex contact wire installation method can imitate the load impact change at the contact wire anchor section joint. For the experimental parameters, not only the technical parameters in the existing patents are collected, but also the changes in the current between the bow and the net can be recorded, the generation of arcs during the bow and net matching process can be monitored, and the wear of the contact wire and the slider and the contact network temperature can be calculated in real time. At the same time, the high-transmittance tempered glass can prevent the flying of the abrasive debris and retain the abrasive debris particles generated in the experiment.

[0090] The above are only specific application examples of the present invention and do not constitute any limitation on the protection scope of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the present invention.

Claims

1. A contact line current-carrying friction and wear test device, characterized in that: Including the pantograph-catenary current-carrying friction and wear test system and the environmental simulation system; The bow-net current-carrying friction and wear test system comprises a fixed truncated table (4), on which a plurality of movable brackets (5) for installing and adjusting the contact wire (6) are installed according to the law of the vortex line, a rotating table (10) is also arranged at the bottom of the fixed truncated table (4), and a lifting mechanism is also arranged below the rotating table (10); the rotating table (10) is installed concentrically with the fixed truncated table (4), and a clamping member (12) is also arranged on the rotating table (10), and the clamping member (12) is connected to an electric converter (23) via an electric wire (19), and the electric converter (23) serves as a current transfer device, and the other side of the electric converter (23) is connected to a current controller (15) via an electric wire (19); The environmental simulation system comprises a mounting frame (1), an experimental chamber (2), a temperature and humidity adjustment mechanism, a normal load detection mechanism, a particle concentration adjustment mechanism, an arc monitoring mechanism, a contact wire wear monitoring mechanism and a contact wire temperature monitoring mechanism, and all the adjustment mechanisms and monitoring mechanisms are connected to a data conversion module and input to a terminal device; The movable bracket (5) comprises a locking button (501), a fastening clamp (502), a support plate (503), a spring (504), a fastening plate (505), a feeding mechanism (506) and a movable clamp (507); The fastening plate (505) is configured as a shell-type structure with a hollow interior, an opening at the top and a size of the opening smaller than the interior size; three springs (504) are arranged in parallel inside the fastening plate (505); The support plate (503) is installed on the upper part of the spring (504) and is restricted inside the fastening plate (505). A locking button (501) for limiting the movement of the support plate (503) is also provided on one side of the bottom of the support plate (503); The fastening clamp (502) is fixed on the support plate (503) and changes as the support plate (503) is subjected to the vibration of the spring (504); The movable clamping plate (507) is connected to the feeding mechanism (506) and is installed on the fastening clamping plate (502).

2. A contact line current-carrying friction and wear test device according to claim 1, characterized in that: The bottom of the rotating platform (10) is connected to the rotating shaft of the variable frequency motor (8) via a coupling (11); The variable frequency motor (8) is installed on the lifting mechanism; The lifting mechanism comprises electric push rods (9) symmetrically arranged on both sides of the variable frequency motor (8), and a push plate (7) is arranged between the two electric push rods (9).

3. A contact line current-carrying friction and wear test device according to claim 1, characterized in that: The clamping member (12) comprises a clamping plate (1201), a pantograph slider (1202), a locking bolt (1203) and a fastening plate (1204); The pantograph slider (1202) matches the shape set to the fixed position of the clamping plate (1201) and is placed in the clamping plate (1201), and is provided with a fastening plate (1204) for fixing the pantograph slider (1202); The clamping member (12) is fixedly mounted on the rotating platform via a locking bolt (1204).

4. A contact line current-carrying friction and wear test device according to claim 1, characterized in that: The rotating platform (10) is also surrounded by a high-transmittance tempered glass (13) for preventing wear debris from flying out during the wear test.

5. A contact line current-carrying friction and wear test device according to claim 1, characterized in that: The experimental chamber (2) is configured as a sealed environment, comprising a chamber body (201), a sealing cover (202), quartz glass (203) and an insulating sealing rubber ring (204); The front and rear ends of the cabin body (201) are hollow structures; the sealing cover (202) is fastened to the front and rear ends of the cabin body (201), and a small groove for accommodating a brass sealing ring is provided in the middle; The quartz glass (203) is sealed and installed in the sealing cover; The bottom of the cabin (201) is also provided with an insulating sealing rubber ring (204) for sealing the through hole through which the rotating shaft of the variable frequency motor (8) passes.

6. A contact line current-carrying friction and wear test device according to claim 1, characterized in that: The temperature and humidity adjustment mechanism comprises a sprayer (20), a heating plate (25) and a temperature and humidity sensor (17); the sprayer (20) is arranged at the upper part of the experimental chamber (2) and connected to a water pipe, the heating plate (25) is installed on both sides of the bottom of the experimental chamber (2), and the temperature and humidity sensor (17) for detecting temperature and humidity is also arranged in the experimental chamber (2); The normal load detection mechanism comprises a pressure sensor (21) for sensing a change in load pressure applied by the pantograph slider (502) to the contact wire (6), wherein the pressure sensor (21) is installed between the clamp (12) and the rotating table (10); The particle concentration regulating mechanism comprises an aerosol generator (14), an air inlet pipe (16), an air outlet pipeline and a particle sensor (24) for detecting the particle concentration; the aerosol generator (14) is arranged on the periphery of the mounting frame (1); one end of the air inlet pipe (16) is connected to the aerosol generator (14) and the other end is installed at the ventilation port of the experimental chamber (2); the air outlet pipeline is installed on the air outlet (26) on the other side of the experimental chamber (2); The arc monitoring mechanism comprises an arc detection device, and an arc detection device for detecting current changes between the bow and the catenary is connected to the bow-catenary current loop in the current controller (15); The contact wire wear monitoring mechanism comprises a high-speed CCD camera (18); the high-speed CCD camera (18) is installed at a side position parallel to the contact wire installation position, and takes pictures of the pantograph and the catenary during the friction fit process; The contact line temperature monitoring mechanism comprises an infrared temperature sensor (22); the infrared temperature sensor (22) is installed at one end of the experimental chamber (2) and converts an optical signal into a digital signal and transmits it to a terminal device (27).

7. A contact line current-carrying friction and wear test device according to claim 1, characterized in that: A current controller (15) for transmitting current between the pantograph and the catenary is arranged on the side of the experimental cabin (2), and a current monitor (28) is matched and arranged in the loop.

8. A control method for a contact line current-carrying friction and wear test device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: clamp the contact wire (6) on the movable clamping plate (507) according to the installation shape of the movable bracket (5). According to the experimental requirements, the locking button (501) is opened in the flexible contact network mode, and the locking button (501) is closed in the rigid contact network mode. After the contact wire (6) is fastened, proceed to step 2; Step 2: close the experimental chamber, input air into the experimental chamber (2) through the aerosol generator (14), set the particle concentration coefficient, use the particle sensor (24) to feedback the particle concentration in the experimental chamber (2), and adjust the air components input by the aerosol generator (14); at the same time, keep the air outlet and the air filter unobstructed, and after maintaining the gas flow in the experimental chamber (2), proceed to step 3; Step 3: Set the temperature and humidity in the experimental chamber (2), turn on the sprayer (20) and the heating plate (25), and control the power of the heating plate (25) and the flow rate of the sprayer (20) through data feedback from the temperature and humidity sensor (17); proceed to step 4 after the air temperature and humidity in the experimental chamber remain relatively stable; Step 4: setting the normal pressure value between the pantograph slider (1202) and the contact wire (6), raising the height of the pantograph slider (1202) by using the electric push rod (9), and controlling the movement of the electric push rod (9) by acting on the pressure sensor (21) through the reverse force; after the normal contact force between the pantograph and the catenary is stable, proceed to step 5; Step 5: Determine the current form and magnitude according to the experimental requirements, and control the current controller (15) to output the corresponding current value; after keeping the current output relatively stable, proceed to step 6; Step 6: Set the speed of the variable frequency motor to drive the slider to rotate at high speed; after the pantograph slider (1202) and the contact wire (6) maintain stable operation, all components maintain stable operation, and proceed to step 7; Step 7: During the stable friction process between the pantograph and the catenary, the current parameters between the pantograph and the catenary are collected through the real-time current changes on the current controller (15), and the arc generated between the pantograph and the catenary is determined based on the changes in the current intensity; a high-speed CCD camera (18) takes photos of the relative friction process between the pantograph slider (1202) and the contact wire (6), and the real-time wear of the pantograph slider (1202) and the contact wire (6) is calculated through the background image processing algorithm; the infrared temperature sensor (22) takes an infrared picture of the identification point position of the contact wire (6), and the real-time temperature parameters are recorded using the background image algorithm; Step 8: When the working parameters need to be changed, repeat steps 1 to 7, download and save the collected parameters, clear them and start recording again; Step 9: Post-processing: clean the wear debris in the rotating table (10).

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