Scaling rolling test bench

Abstract

The utility model discloses a scaling rolling test bench, and relates to the technical field of railway vehicle testing. In the scaling rolling test bed, a track wheel system comprises a track wheel driving module and track wheels connected to the track wheel driving module, and the track wheels comprise six-component wheels; the wheel system comprises a wheel driving module and a scaling wheel connected to the wheel driving module, and the scaling wheel is arranged above the track wheel; the vertical loading system is arranged above the scaled wheel so as to provide a vertical load for the scaled wheel. The rail wheel comprises a six-component wheel, the rail wheel can be directly measured to obtain three-dimensional force and torque, errors caused by indirect calculation by additionally arranging strain gauges on the rail wheel in the prior art are avoided, the testing precision of the wheel rail vibration boundary condition can be improved, meanwhile, the steps of arranging, designing and assembling the strain gauges in the prior art can be avoided, and the testing efficiency is improved. And the assembling convenience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to rail vehicle test technical field, especially relate to a scale rolling test bench. BACKGROUND

[0002] In order to accurately study the vibration characteristics generated in the process of high-speed train and its interaction with the track, it is particularly necessary to establish a wheel-rail vibration boundary condition test bench.

[0003] In the prior art, some research institutions mainly use scale wheel-rail vibration boundary condition test benches to simulate the interaction between scale wheel and rail and conduct experimental research. However, in the wheel-rail boundary condition test under the condition of high speed and light weight, strain gauges are arranged on the track wheel to detect the required force and torque, but the strain gauges usually need complex sheet design to partially restore three-dimensional force, which is easy to miss some force or torque components, and it is difficult to provide comprehensive data support. Moreover, since the force or torque needs to be indirectly calculated according to the detection value of the strain gauge, there is a large precision error.

[0004] Therefore, how to improve the test precision of wheel-rail vibration boundary condition is a technical problem to be solved by those skilled in the art at present. UTILITY MODEL CONTENT

[0005] Therefore, the utility model aims at providing a scale rolling test bench, which can improve the test precision of wheel-rail vibration boundary condition.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A scale rolling test bench, comprising a track wheel system, a wheel system and a vertical loading system; the track wheel system comprises a track wheel driving module and a track wheel connected to the track wheel driving module, wherein the track wheel comprises a six-component force wheel; the wheel system comprises a wheel driving module and a scale wheel connected to the wheel driving module, and the scale wheel is arranged above the track wheel; the vertical loading system is arranged above the scale wheel to provide vertical load to the scale wheel.

[0008] Exemplarily, the track wheel rim comprises a plurality of track wheel rims, and the outer periphery of the track wheel can be switchably provided with any track wheel rim.

[0009] Exemplarily, the track wheel driving module comprises a first torque meter, a first flywheel box, a first brake device, a first driving motor and a first driving motor mounting seat; the track wheel center is connected to a first wheel shaft, the first torque meter is arranged on the first wheel shaft, and the first wheel shaft is connected to the first flywheel box, the first brake device and the first driving motor; a first driving motor encoder is arranged on the output shaft of the first driving motor.

[0010] Exemplarily, the wheel driving module comprises a second gear box, a second clutch, a second driving motor, a second brake device and a second torque meter; the center of the scaled wheel is connected to a second wheel shaft, the second wheel shaft is connected to the second brake device and the second gear box, the second gear box is connected to the output shaft of the second driving motor through the second clutch, and the output shaft of the second driving motor is connected to the second torque meter.

[0011] Exemplarily, the wheel driving module further comprises a second rack, a damping device and an adjusting device; the vertical loading system is connected to the second rack, the scaled wheel is connected to the lower part of the damping device through a second bearing seat, and the vertical loading system is arranged above the damping device to load the scaled wheel through the damping device; and the adjusting device is connected to the second bearing seat to adjust the position of the scaled wheel.

[0012] Exemplarily, a wheel-rail environment adjusting system is further comprised, and the wheel-rail environment adjusting system comprises an environment bin with adjustable temperature, and the scaled wheel and the rail wheel are located in the environment bin.

[0013] Exemplarily, the rail wheel is connected to the rail wheel driving module through a first wheel shaft, the scaled wheel is connected to the wheel driving module through a second wheel shaft, and the first wheel shaft and / or the second wheel shaft are preset wheel shafts; the preset wheel shafts pass through the environment bin through mounting holes on the bin body shell of the environment bin, and sealing pieces are arranged between the preset wheel shafts and the mounting holes.

[0014] Exemplarily, the environment bin is provided with a bin door and a visible observation window.

[0015] Exemplarily, a brake device is arranged in the wheel driving module and / or the rail wheel driving module, and a brake protector cover is arranged on the outer cover of the brake device.

[0016] Exemplarily, a shaft coupling is arranged in the wheel driving module and / or the rail wheel driving module, and a shaft coupling protector cover is arranged on the outer cover of the shaft coupling.

[0017] The scaled rolling test bench provided by the utility model, comprising a rail wheel system, a wheel system and a vertical loading system; the rail wheel system comprises a rail wheel driving module and a rail wheel connected to the rail wheel driving module, wherein the rail wheel comprises a six-component force wheel; the wheel system comprises a wheel driving module and a scaled wheel connected to the wheel driving module, and the scaled wheel is arranged above the rail wheel; and the vertical loading system is arranged above the scaled wheel to provide vertical load to the scaled wheel.

[0018] In the scaled rolling test bed, the track wheel comprises a six-component force wheel, three-dimensional force and torque of the track wheel can be directly measured, errors caused by indirectly calculating through additionally arranging strain gauges on the track wheel in the traditional technology can be avoided, the test precision of the wheel-rail vibration boundary condition can be improved, the scaled rolling test bed is suitable for more complex dynamic analysis of the track vehicle, such as wheel-rail contact force, multi-axis linkage dynamics analysis, etc., meanwhile, the design and assembly steps of the strain gauges in the traditional technology can be avoided, and the convenience of assembly is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0020] Figure 1 A structure schematic diagram of the test bed of the specific embodiment provided by the present application is shown in the figure.

[0021] Figure 2 A structure schematic diagram of the track wheel system of the specific embodiment provided by the present application is shown in the figure.

[0022] Figure 3 A structure schematic diagram of the track wheel of the specific embodiment provided by the present application is shown in the figure.

[0023] Figure 4 A structure schematic diagram of the wheel system of the specific embodiment provided by the present application is shown in the figure.

[0024] Figure 5 A structure schematic diagram of the vertical loading system of the specific embodiment provided by the present application is shown in the figure.

[0025] Figure 6 A structure schematic diagram of the lubricating system of the specific embodiment provided by the present application is shown in the figure.

[0026] Figure 7 A structure schematic diagram of the wheel-rail environment adjusting system of the specific embodiment provided by the present application is shown in the figure.

[0027] Figure 8 A structure schematic diagram of the brake guard of the specific embodiment provided by the present application is shown in the figure.

[0028] Figure 9 A structure schematic diagram of the coupling guard of the specific embodiment provided by the present application is shown in the figure.

[0029] Reference signs:

[0030] 1-Orbit wheel system, 11-Orbit wheel, 111-Six component wheel, 112-Three component sensor, 113-Orbit wheel rim, 12-First torque meter, 13-First flywheel box, 14-First brake device, 15-First drive motor, 16-First drive motor mounting seat, 17-First wheel shaft;

[0031] 2-Wheel system, 21-Reduced scale wheel, 22-Second gear box, 23-Second clutch, 24-Second drive motor, 25-Second brake device, 26-Second torque meter, 27-Second frame, 28-Damping device, 29-Adjusting device, 210-Second wheel shaft;

[0032] 3-Vertical loading system;

[0033] 4-Lubricating system;

[0034] 5-Wheel rail environment adjustment system, 51-Environment bin, 511-Bin body shell, 512-Assembly hole, 513-Mounting hole;

[0035] 6-Brake guard;

[0036] 7-Coupling guard;

[0037] 8-Test bed main body. DETAILED DESCRIPTION

[0038] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0039] The core of the utility model is to provide a reduced scale rolling test bed, which can improve the test precision of wheel rail vibration boundary conditions.

[0040] The specific embodiment one of the reduced scale rolling test bed provided by the utility model is described with reference to Figures 1 to 9 , including orbit wheel system 1, wheel system 2, vertical loading system 3, lubricating system 4, wheel rail environment adjustment system 5, safety protection accessory, test bed main body 8.

[0041] Other structures in the test bed can be arranged on the test bed main body 8, so as to form a whole. The test bed main body 8 can be a cast iron platform. The track wheel system 1, the wheel system 2, the vertical loading system 3, the lubrication system 4 and the wheel-rail environment adjustment system 5 can be connected to the control system and be controlled by the control system.

[0042] The track wheel system 1 includes a track wheel driving module and a track wheel 11 connected to the track wheel driving module. The track wheel driving module is used to control the operation or braking of the track wheel 11.

[0043] The track wheel 11 includes a six-component force wheel 111. The six-component force wheel 111 includes a three-component sensor, which can measure the force or acceleration of an object in three orthogonal directions at the same time. Specifically, the three-component sensor adopts a three-component force sensor 112.

[0044] Based on the arrangement of the three-component sensor, the data that can be tested by the six-component force wheel 111 includes forces in three directions (such as X, Y and Z axes) and torques in three directions (such as torques around the X, Y and Z axes), specifically Fx, Fy, Fz, Mx, My and Mz. Specifically, the forces and torques in three directions correspond to: the longitudinal force Fy of the scaled wheel 21 in the driving direction, the overturning torque My around the axis of the driving direction; the lateral force Fx of the scaled wheel 21 in the lateral direction, the rolling resistance torque Mx around the axis of the lateral direction; the vertical force Fz of the scaled wheel 21 in the vertical direction, the return torque Mz around the axis of the vertical direction; the driving direction Y, the lateral direction X and the vertical direction Z are perpendicular to each other.

[0045] The wheel system 2 includes a wheel driving module and a scaled wheel 21 connected to the wheel driving module. The wheel driving module is used to control the operation or braking of the scaled wheel 21. The scaled wheel 21 is arranged above the track wheel 11 and can be attached or pressed to have a force action.

[0046] The vertical loading system 3 is arranged above the scaled wheel 21 to provide a vertical (which can correspond to the up-down direction in actual use) load to the scaled wheel 21. The load can be vibrated up and down at a set frequency to provide a vibration test condition.

[0047] In this embodiment, the track wheel 11 includes a six-component force wheel 111, which can directly measure the three-dimensional force and torque of the track wheel 11, avoiding the errors caused by indirectly calculating through additionally arranging strain gauges on the track wheel 11 in the traditional technology, and being suitable for more complex track vehicle dynamic analysis, such as wheel-rail contact force, multi-axis linkage dynamics analysis, etc. At the same time, the six-component force wheel 111 can accurately capture the transient changes of force and torque under high-frequency dynamic load conditions, and can overcome the problems of hysteresis or signal noise of strain gauges in the traditional technology under high-frequency response.

[0048] Further, please refer to Figure 2 and Figure 3 , the track wheel system 1 includes the track wheel 11 and the track wheel driving module.

[0049] For the track wheel 11, it includes the six-component force wheel 111, which transmits the signals of the three-component force sensor 112 through the slip ring. The six-component force wheel 111 includes the three-component force sensor 112, specifically including a plurality of parallel three-component force sensors 112, for example, 4. Each three-component force sensor 112 can measure the load in three orthogonal directions and calculate and output six-channel wheel center load. The six channels can specifically refer to six signal channels corresponding to three orthogonal directions of force and three orthogonal directions of torque. Among them, the six-component force wheel 111 can form a statically indeterminate structure, and can use coordinate transformation to calibrate and analyze the track wheel 11 with a parallel structure of 4 three-component force sensors 112. Among them, the six-component force wheel 111 can complete calibration in the factory, has a unified calibration curve, higher repeatability and reliability, and is not easily affected by environmental changes.

[0050] In some embodiments, the six-component force wheel 111 includes 4 measuring units, each of which includes a three-component force sensor 112, an outer fixed disc and an inner fixed ring, and the three-component force sensor 112 is arranged between the outer fixed disc and the inner fixed ring. At this time, the 4 three-component force sensors 112 are connected in parallel. In addition, the 4 three-component force sensors 112 are uniformly arranged in the circumferential direction around the axis of the first wheel shaft 17 which connects and drives the track wheel 11 to rotate.

[0051] In addition, the outer periphery of the track wheel 11 is provided with a track wheel rim 113, which can be specifically provided at the outer periphery of the finished six-component force wheel 111, or a part at the outermost side in the radial direction of the six-component force wheel 111 is divided as the track wheel rim 113. In order to provide various test conditions, the test bench includes various track wheel rims 113, and the outer periphery of the track wheel 11 can be switchably provided with any track wheel rim 113.

[0052] It should be noted that the wheel flanges 113 of different types of track wheels are provided with different structures, specifically including the structure of the outer circumferential surface of the wheel flange 113, to provide different track test conditions and meet different test requirements. Specifically, the wheel flanges 113 can be replaced according to test requirements before the test.

[0053] In some embodiments, the outer circumferential surface of the plurality of wheel flanges 113 is an irregular circular surface, and the irregularity (which can specifically refer to the radial jump value) is different to simulate different vibration conditions. The irregularity can be selected within a range according to the set rotational speed of the track wheel 11. For example, in some track wheels 11, the standard diameter of the track wheel 11 is 400 mm, and the irregularity is set based on this. At a rotational speed of 3265 rpm, the corresponding linear speed is about 246 km / h. At this time, the irregularity of the wheel flange is in a range of 1 mm, and the value is selected within 1 mm, which can simulate different vibration effects within 1 mm.

[0054] For the track wheel driving module, as shown in Figure 2 , it includes a first torque meter 12, a first flywheel box 13, a first brake device 14, a first driving motor 15, a first driving motor mounting seat 16, and a first driving motor encoder.

[0055] The center of the track wheel 11 is connected to the first wheel shaft 17, and the track wheel 11 is connected to the track wheel driving module through the first wheel shaft 17 to realize transmission. When selecting the first wheel shaft 17, in a specific test condition, the maximum vertical loading force on the track wheel 11 is 1 KN, and the strength of the first wheel shaft 17 needs to be checked to obtain the safety factor of the shaft under the action of bending moment, and a shaft meeting the requirements is selected as the first wheel shaft 17 to ensure the use strength requirement of the first wheel shaft 17.

[0056] The first torque meter 12 is arranged on the first wheel shaft 17, and the first torque meter 12 has a torque measurement function and can measure the torque in the rotation process of the track wheel 11.

[0057] The first wheel shaft 17 is connected to the first flywheel box 13, the first brake device 14, and the first driving motor 15. The first flywheel box 13 can store and release energy by means of its own moment of inertia to ensure the stability and continuity of the track wheel system. Optionally, the first flywheel box 13 includes a single flywheel structure with an inertia of 5.5 kg·m 2 . The first brake device 14 is composed of a brake disc and a pneumatic brake. The first driving motor 15 can be connected to the first flywheel box 13 through a first clutch. Optionally, the first driving motor 15 is arranged on the first driving motor mounting seat 16, and a first driving motor encoder can also be arranged on the output shaft of the first driving motor 15 to detect the rotational speed of the first driving motor 15.

[0058] Further, please refer toFigure 4 The wheel system 2 comprises a scaled wheel 21 and a wheel driving module. The wheel driving module is used to realize the driving or braking of the scaled wheel 21.

[0059] For the scaled wheel 21, it is smaller than the actual wheel. Optionally, a scaled wheel 21, with a scale of 1:5 to the actual wheel, has a maximum running linear speed of 250 km / h. For example, the actual wheel has a diameter of 920 mm, the scaled wheel 21 has a diameter of 184 mm, the maximum rotating speed is 7100 rpm, and the corresponding linear speed is about 246 km / h. The test bed is a single-wheel rolling test bed.

[0060] For the wheel driving module, as shown in FIG. 2, it comprises a second gear box 22, a second clutch 23, a second driving motor 24, a second braking device 25, a second torque meter 26, a second frame 27, a ball cage universal joint, a damping device 28, and an adjusting device 29. Figure 4 The center of the scaled wheel 21 is connected to the second wheel shaft 210, so as to connect the wheel driving module through the second wheel shaft 210. The second wheel shaft 210 is connected to the second braking device 25 and the second gear box 22. The second gear box 22 can be used as a speed increasing adjusting mechanism. Optionally, the variable ratio is initially designed to be 1:2.8. For example, the second driving motor 24 reaches a maximum rotating speed of 2533 rpm, so that the rotating speed of the scaled wheel 21 reaches about 7100 rpm at the maximum. The second gear box 22 is connected to the output shaft of the second driving motor 24 through the second clutch 23. The second clutch 23 is used to realize the engagement or disengagement of the scaled wheel 21 and the second driving motor 24. The output shaft of the second driving motor 24 is connected to the second torque meter 26, which has a torque measuring function. In addition, a torque meter can also be arranged on the second wheel shaft 210.

[0061] The second frame 27 can be used to connect the vertical loading system 3 and the wheel system 2. Specifically, the vertical loading system 3 is connected to the second frame 27. The scaled wheel 21 is connected to the lower part of the damping device 28 through the second bearing seat. The damping device 28 is used to reduce the impact of vibration on the scaled wheel 21 and the upper mechanism. The vertical loading system 3 is arranged above the damping device 28, so as to load the scaled wheel 21 through the damping device 28 and provide vertical load.

[0062] The adjusting device 29 is connected to the second bearing seat, so as to adjust the position of the scaled wheel 21. Optionally, the adjusting device 29 adjusts the relative position of the scaled wheel 21 and the track wheel 11 manually. For example, the X direction and the Y direction can be adjusted. The X direction and the Y direction are specifically perpendicular to the vertical direction of the vertical load of the vertical loading system 3.

[0063]

[0064] ​The track wheel system 1 and the wheel system 2 in the embodiment, the track wheel 11 and the scaled wheel 21 are respectively driven by the motor (the first driving motor 15, the second driving motor 24), the relative speed difference of the scaled wheel 21 and the track wheel 11 can be realized in the motor pair dragging form, and the three-way load is calculated by accurately measuring the six-component force wheel 111. The track wheel 11 and the scaled wheel 21 of the scaled ratio can realize the verification of the real-time adhesion control of the traction / braking state by dragging, realize the relative slip between the wheel and the rail, and can accurately measure the contact force and the relative slip speed, and can control the construction, use and maintenance cost of the test bed, and can simulate more wheel-rail vibration boundary conditions under the working condition scene.

[0065] Further, please refer to Figure 4 and Figure 5 The vertical loading system 3 includes a vertical actuator, specifically a hydraulic actuator. The vertical loading system 3 is used to apply vertical load to the scaled wheel 21, specifically by accurately loading the hydraulic actuator. Exemplarily, the vertical loading system 3 provides a maximum load of 1KN to simulate the axle load. The hydraulic actuator is provided with a special hydraulic station to provide the oil source.

[0066] Specifically, the vertical loading system 3 mainly functions to provide vertical loading force when studying wheel-rail adhesion and creep, and to generate wheel-rail contact. In addition to simulating axle load, it can also simulate the vibration transmission above the primary suspension to a certain extent. In addition, by simulating the unloading condition, together with the out-of-roundness on the track wheel rim 113, the scaled wheel 21 can be made to jump.

[0067] In order to control the hydraulic actuator, the test bed also includes a hydraulic loading device, specifically including a hydraulic oil supply system and a hydraulic driving device.

[0068] The hydraulic oil supply system is connected between the main hard pipe and the hydraulic actuator, including an oil distributor seat, an accumulator, an oil distributor system and the like. The main function of the hydraulic oil supply system is to independently input the hydraulic oil output by the main hard pipe to each hydraulic driving device through the oil distributor, and the accumulator ensures that the hydraulic oil has enough pressure when entering the hydraulic actuator.

[0069] The hydraulic driving device includes a base, a fixed tool, a servo valve, a force and displacement sensor. The inlet and outlet pipes of the hydraulic actuator are connected with the oil distribution system providing hydraulic oil with a certain pressure, which provides the power source of the hydraulic actuator. The base and the fixed tool are mainly used for the fixation of components. The servo valve controls the cylinder flow rate entering the hydraulic actuator to control the piston movement of the hydraulic actuator. The force and displacement sensor is used to collect the force and displacement of the hydraulic actuator during the test. Optionally, the rated pressure of the hydraulic actuator is 16Mpa, and the load is 1KN. This load does not consider the influence of the self weight and vibration of the scaled wheel 21 and the scaled wheel 21 installation tool on the loading force.

[0070] Please refer to Figure 6 , the lubrication system 4 is used to ensure the normal operation of the clutch and the gear box, for example, the first clutch, the second clutch 23, the second gear box. According to the needs, the internal gears and bearings of the corresponding equipment can be forced lubricated. Among them, the gear box lubricating oil amount is ≥25L / min, and the clutch lubricating oil amount is 15L / min.

[0071] Further, as shown in Figure 1 and Figure 7 , the wheel-rail environment adjustment system 5 includes an adjustable temperature environment bin 51, which can simulate the wheel-rail vibration boundary conditions under more working condition scenarios. Specifically, it can simulate working conditions at different temperatures, provide data support for the wheelset design and material selection of the rail vehicle, improve the multi-working condition testing capability of the test bench, and reproduce the real running environment to improve the reliability of the test results. It can also study the influence of environmental temperature on the rolling vibration response of the scaled wheel 21 to improve and perfect the testing accuracy of the wheel-rail vibration boundary conditions and the test working condition scenarios.

[0072] Optionally, the environment bin 51 adopts PID temperature adjustment, and specifically, a compressor can be used for refrigeration. The temperature adjustable range can be -20℃ to +55℃.

[0073] In addition, the environment bin 51 has a protective effect, and the scaled wheel 21 and the rail wheel 11 are built-in the environment bin 51, which can prevent the rotating parts from flying out and causing harm to the surrounding people or facilities.

[0074] Optionally, the environment bin 51 is a sealed chamber, which seals the rail wheel 11 and the scaled wheel 21. Specifically, the environment bin 51 includes a bin body shell 511, which includes a thermal insulation layer, which is externally located on the bin body shell 511 or located in the shell wall of the bin body shell 511. At this time, since the environment bin 51 has good sealing and thermal insulation properties, the stability of the temperature field during the test process is ensured.

[0075] Optionally, as shown in Figure 1 , the wheel system 2 and the rail wheel system 1 are arranged in sequence along the first direction. On the side of the rail wheel 11, the rail wheel 11 is located in the environment bin 51, and the first wheel shaft 17 of the rail wheel 11 penetrates out of the bin body shell 511 of the environment bin 51 from one side of the first direction, and is connected with the rail wheel driving module, specifically connected with the first flywheel box 13. The bin body shell 511 is provided with a mounting hole 513, and the first wheel shaft 17 penetrates out of the environment bin 51 through the mounting hole 513, and a sealing element is arranged between the first wheel shaft 17 and the mounting hole 513 to ensure the sealing effect. Exemplarily, the sealing element includes a temperature-resistant thickened cloth, and the temperature-resistant thickened cloth is internally provided with thermal insulation cotton. The sealing element is fixed around the rotating shaft by a semicircular flange sewing method for sealing.

[0076] In addition, as shown in Figure 1 The scaled wheel 21 is located in the environmental cabin 51, and the second wheel shaft 210 of the scaled wheel 21 penetrates out of the cabin body shell 511 of the environmental cabin 51 from the other side in the first direction, and is connected with the wheel driving module, specifically the second gear box 22. In addition, the side of the environmental cabin 51 opposite to the mounting hole 513 is provided with an assembly hole 512, which is matched with the second rack 27, and the assembly hole 512 is covered on the second rack 27, and specifically can be attached to the top surface and two side surfaces of the second rack 27. In addition, the assembly hole 512 can be sealingly matched with the second rack 27.

[0077] Optionally, the environmental cabin 51 is an open-bottom structure, and the open bottom is sealed by the test bench main body 8. At this time, the environmental cabin 51 has the function of overall hoisting, and the environmental cabin 51 can be installed in the test bench in a hoisting manner, and can be hoisted away during the replacement of the rail wheel rim 113. In addition, the mounting hole 513 and the assembly hole 512 are provided at both ends of the cabin body shell 511 in the first direction, and can be downwardly penetrated, so as to be directly sleeved above the first wheel shaft 17 and the second rack 27 during hoisting.

[0078] Optionally, a water collector is further arranged in the environmental cabin 51, and a drain pipe of the water collector penetrates through the outside of the cabin body shell 511 to guide the condensed water out. Exemplarily, the water collector is a stainless steel annular water disc collector, and the condensed water is guided out through the annular water disc collector.

[0079] Optionally, two cabin doors are arranged on the environmental cabin 51, and specifically can be arranged on both sides in a direction perpendicular to the first direction and the up-down direction. In addition, the environmental cabin 51 is further provided with a visible observation window, which facilitates observation of the inside of the environmental cabin 51. In addition, a lighting device can be further arranged in the environmental cabin 51, which has a lighting function to ensure sufficient brightness in the cabin.

[0080] It should be noted that in the low-temperature environment, the torque instrument, the force sensor, the three-component sensor and the oil circuit system and other components located in the environmental cabin 51 need to meet the low-temperature working requirements and are specifically selected and designed, wherein the torque instrument can be selected to support a working temperature range of-20~85℃, the three-component sensor in the six-component wheel 111 can be selected to support a working temperature range of-20~60℃, the force sensor can be selected to support a working temperature range of-30~85℃, and the bearing can be selected to be safe under the condition of-20℃ or above.

[0081] In addition, when the temperature of the hydraulic oil is too low, the viscosity of the hydraulic oil increases, the flowability is poor, the resistance is large, the working efficiency is low, and when the oil temperature is lower than 15 degrees, the hydraulic motor, valve, pipeline and the like are easily damaged. Therefore, the working temperature of the hydraulic system is generally controlled between 15-65℃. For the vertical loading system 3 in the embodiment, since it is applied to hydraulic oil, the hydraulic actuator is specifically suspended outside the environment bin 51 to eliminate the adverse effects of low temperature on the oil circuit and the hydraulic actuator. In view of the above.

[0082] Further, as shown in Figure 8 and Figure 9 , the safety protection accessories include a brake guard 6 and a coupling guard 7.

[0083] Specifically, the brake guard 6 has two, which are respectively arranged on the first brake device 14 and the second brake device 25. The brake guard 6 prevents the parts on the corresponding brake from flying out, thereby avoiding harm to the surrounding people or facilities. Optionally, the brake guard 6 adopts a section steel with a carbon steel material as a skeleton, and a 2mm-thick carbon steel plate as a panel, so as to ensure that the brake guard 6 has sufficient rigidity.

[0084] Specifically, the coupling guard 7 has two, which are specifically arranged in the wheel driving module and are respectively arranged on the couplings between the second gear box 22 and the scaled wheel 21 and between the second gear box 22 and the second driving motor 24. The coupling guard 7 prevents the parts on the couplings from flying out, thereby avoiding harm to the surrounding people or facilities. The stand of the coupling guard 7 is composed of an H-shaped steel and a 10mm-thick steel plate, and an arc-shaped cover made of a 2mm-thick steel plate is arranged, so as to ensure that the coupling guard 7 has sufficient rigidity.

[0085] The scaled rolling test bench provided by the embodiment can be used for testing the wheel-rail vibration boundary condition, has a small footprint, greatly reduces the track rolling wheel curvature radius, enhances the reliability of the test bench data, and can ensure the test precision of the wheel-rail vibration boundary condition. Since the rolling component has a small mass, the actuator can easily realize curve experiments in a high-speed rotating state of the rolling component. The running cost and energy consumption are greatly reduced, the energy consumption is low in long-term wheel-rail adhesion creep and rolling contact tests, and an economical solution is realized.

[0086] In addition, after the overall weight of the vehicle is reduced, the component vibration develops to a high frequency, and the wheel-rail creep theory needs to be researched and corrected in a targeted manner. After the scaled wheel 21 adopts a new type of material, the contact surface state of the new wheel-rail material needs to be analyzed. The vehicle adopts a new type of guide system and driving system and adopts real-time control of the guide and adhesion, and the basic technology needs to be tested in principle. Research on digital and physical fusion tests to replace the whole vehicle rolling vibration / track test is needed.

[0087] The test table in the embodiment has higher test speed, provides slippage with wheel-rail pair, has higher precision for test data of wheel-rail vibration boundary conditions under high-speed conditions, can accurately measure and obtain a large amount of wheel-rail contact state data, and can normally operate under long-time, high-speed and strong impact conditions, can adjust and set track surface conditions, has higher speed grade, realizes wheel-rail load reduction bounce, and has the test capability of wheel-rail vibration boundary condition indexes of next-generation high-speed, lightweight and intelligent scaled train wheels.

[0088] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be intervening elements. When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can be present. In addition, in the description of the present application, unless otherwise specified, the meaning of "a plurality of", "a plurality of", "a plurality of" is two or more than two.

[0089] The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated.

[0090] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application.

[0091] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0092] The above provides a detailed introduction to the scaled rolling test table provided by the present application. In this paper, the principle and implementation of the present application are described by specific examples. The above description of the embodiments is only used to help understand the method and core idea of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the principle of the present application, the present application can be improved and modified. These improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A scaled-down rolling test bench, characterized in that, It includes a track wheel system (1), a wheel system (2), and a vertical loading system (3); The track wheel system (1) includes a track wheel drive module and a track wheel (11) connected to the track wheel drive module, wherein the track wheel (11) includes a six-component force wheel (111). The wheel system (2) includes a wheel drive module and a scaled-down wheel (21) connected to the wheel drive module, the scaled-down wheel (21) being located above the track wheel (11); The vertical loading system (3) is located above the scaled wheel (21) to provide a vertical load to the scaled wheel (21).

2. The scaled-down rolling test bench according to claim 1, characterized in that, It includes multiple track wheel rims (113), and any of the track wheel rims (113) can be switched on the outer periphery of the track wheel (11).

3. The scaled-down rolling test bench according to claim 1, characterized in that, The track wheel drive module includes a first torque meter (12), a first flywheel box (13), a first braking device (14), a first drive motor (15), and a first drive motor mounting base (16). The track wheel (11) is centrally connected to the first wheel axle (17), the first torque meter (12) is mounted on the first wheel axle (17), the first wheel axle (17) is connected to the first flywheel box (13), the first braking device (14) and the first drive motor (15); the first drive motor encoder is mounted on the output shaft of the first drive motor (15).

4. The scaled-down rolling test bench according to claim 1, characterized in that, The wheel drive module includes a second gearbox (22), a second clutch (23), a second drive motor (24), a second braking device (25), and a second torque meter (26). The center of the scaled wheel (21) is connected to the second axle (210), the second axle (210) is connected to the second braking device (25) and the second gearbox (22), the second gearbox (22) is connected to the output shaft of the second drive motor (24) through the second clutch (23), and the output shaft of the second drive motor (24) is connected to the second torque meter (26).

5. The scaled-down rolling test bench according to claim 4, characterized in that, The wheel drive module also includes a second frame (27), a vibration damping device (28), and an adjustment device (29); the vertical loading system (3) is connected to the second frame (27), the scaled wheel (21) is connected to the lower part of the vibration damping device (28) through the second bearing seat, the vertical loading system (3) is located above the vibration damping device (28) to load the scaled wheel (21) through the vibration damping device (28); the adjustment device (29) is connected to the second bearing seat to adjust the position of the scaled wheel (21).

6. The scaled-down rolling test bench according to any one of claims 1 to 5, characterized in that, It also includes a wheel-rail environment adjustment system (5), which includes an adjustable temperature environment chamber (51), and the scaled-down wheel (21) and the track wheel (11) are located in the environment chamber (51).

7. The scaled-down rolling test bench according to claim 6, characterized in that, The track wheel (11) is connected to the track wheel drive module via the first wheel axle (17), and the scaled wheel (21) is connected to the wheel drive module via the second wheel axle (210). The first wheel axle (17) and / or the second wheel axle (210) are preset wheel axles. The preset wheel axle passes through the mounting hole (513) on the outer shell (511) of the environmental chamber (51) and exits the environmental chamber (51). A sealing element is provided between the preset wheel axle and the mounting hole (513).

8. The scaled-down rolling test bench according to claim 7, characterized in that, The environmental chamber (51) has a door and a viewing window.

9. The scaled-down rolling test bench according to any one of claims 1 to 5, characterized in that, The wheel drive module and / or the track wheel drive module are equipped with a braking device, and the braking device is covered with a brake protective cover (6).

10. The scaled-down rolling test bench according to any one of claims 1 to 5, characterized in that, The wheel drive module and / or the track wheel drive module are provided with a coupling, and the coupling is covered with a coupling protective cover (7).

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