Wheel drive system for five-belt mobile floor system
By using the wheel drive device of the five-belt moving floor system, and by matching the steel belt with the incoming flow velocity and moving components, the boundary layer is eliminated, solving the problem of the accuracy of simulating the ground effect on a fixed flat plate, and realizing a domestically produced high-efficiency wind tunnel test device.
Patent Information
- Application Number
- CN202511801829.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-02
- Publication Date
- 2026-01-20
AI Technical Summary
The fixed flat plate method used in existing automotive wind tunnels to simulate ground effects leads to an increase in boundary layer thickness, affecting the accuracy of test results. Furthermore, the cost of imported equipment is high, making it difficult to meet the needs of domestic production.
The system employs a five-belt moving floor system, including four sets of wheel drive units. By utilizing steel belts with the same velocity as the incoming flow, and through the coordinated action of tensioning and correction devices and air flotation adsorption devices, the boundary layer is eliminated. Combined with X-axis and Y-axis moving components, it adapts to different vehicle models and achieves high-precision ground effect simulation.
It improves the accuracy of wind tunnel ground effect simulation and the reliability of test results, reduces equipment costs, is applicable to various vehicle models, and realizes the localization of mobile floor technology.
Smart Images
Figure CN121364053A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of automobile wind tunnel technology, and particularly relates to a wheel driving system for a five-belt moving floor system. BACKGROUND
[0002] The existing moving belt floor devices of all the automobile wind tunnels built in China are all introduced from abroad, and the costs of equipment procurement, use and maintenance are extremely high. There are many limitations in the later improvement and upgrading. At present, the domestic automobile industry is in full swing, and the market urgently needs self-developed moving belt floor technology. From the product safety and model development, it is of great significance to carry out key technology research on the moving belt floor and complete the localization construction.
[0003] In the research of automobile aerodynamic performance and low-speed wind tunnel test of aviation, ground effect simulation is one of the key links. The traditional method of simulating the ground is to install a fixed flat plate in the wind tunnel to obtain the influence of the ground effect. At present, this method is still used for ground effect test in the low-speed wind tunnel of aviation in China. However, the surface of the fixed flat plate will form a boundary layer that does not exist in real flight and continuously thickens. This boundary layer will lead to inaccurate ground effect test results. For vehicles, if the thickness of the ground boundary layer is greater than 10% of the ground clearance of the vehicle being tested, the measured drag will decrease and the lift will increase. SUMMARY
[0004] The purpose of the present application is to overcome the above-mentioned problems, and to provide a wheel driving system for a five-belt moving floor system.
[0005] The technical scheme adopted by the present application to achieve the above-mentioned purpose is: The wheel driving system for the five-belt moving floor system comprises four groups of wheel driving units arranged opposite to each other, the wheel driving unit comprises a driving roller, a driven roller and a steel belt, the driving roller and the driven roller are installed on a support frame, the steel belt is sleeved between the driving roller and the driven roller, the driving roller drives the steel belt to move through a driving device, the driven roller is provided with a tensioning and correcting device, the bottom of the steel belt is provided with an air floating and adsorbing device, the wheel driving unit is installed on a Y-axis moving assembly through the support frame, the Y-axis moving assembly drives the wheel driving unit to move in the Y direction, two groups of wheel driving units on the same side are installed on the same X-axis moving assembly through corresponding Y-axis moving assemblies, the two groups of X-axis moving assemblies are arranged in parallel, and the X-axis moving assemblies drive the wheel driving unit to move in the X direction.
[0006] The tensioning and correcting device comprises a hydraulic cylinder installed on the support frame and a boundary measuring sensor, the hydraulic cylinder is connected with the bearing seat of the driven roller, the boundary sensor is installed on a running frame, the boundary sensor is located at the edge of the steel belt, and the hydraulic cylinder and the boundary sensor are connected with a hydraulic servo system.
[0007] The gas floating adsorption device is provided with a porous plate.
[0008] The application has the characteristics that: through the cooperation of the steel belt with the same speed as the incoming flow, the tensioning and deviation rectifying device and the gas floating adsorption device, the boundary layer is effectively eliminated, and the accuracy of the ground effect simulation of the wind tunnel and the reliability of the test results are improved, and the X-axis moving assembly and the Y-axis moving assembly are suitable for vehicle models with different wheelbase and track. BRIEF DESCRIPTION OF DRAWINGS
[0009] Fig. 1 is a structural schematic diagram of the application; Fig. 2 is a structural schematic diagram of the wheel driving unit of the application; Fig. 3 is a structural schematic diagram of the tensioning and deviation rectifying device of the application.
[0010] 1, wheel driving unit; 11, steel belt; 12, driving roller; 13, driven roller; 14, driving device; 15, support frame; 16, tensioning and deviation rectifying device; 161, hydraulic cylinder; 162, boundary sensor; 17, gas floating adsorption device; 2, Y-axis moving assembly; 3, X-axis moving assembly. DETAILED DESCRIPTION
[0011] As Figs. 1-3As shown, the present application is a kind of wheel drive system for five-belt moving floor system, mainly provides drive for wheel, simulates air flow near the wheel, which includes four groups of wheel drive unit 1 and is arranged oppositely two by two, the wheel drive unit 1 includes driving roller 12, driven roller 13, steel belt 11, the driving roller 12, driven roller 13 is installed on support frame 15, the steel belt 11 is sleeved between driving roller 12, driven roller 13, the driving roller 12 moves the steel belt 11 by driving device 14, the driving device 14 is installed on the axis of driving roller 12, adopts servo control, and is provided with brake device, the steel belt 11 forms moving belt floor, and the moving belt floor adopts limited length annular movable belt moving at the same speed as the incoming flow speed, the driven roller 13 is provided with tensioning and correcting device 16, the tensioning and correcting device 16 includes hydraulic cylinder 161 installed on support frame 15, boundary sensor 162, the hydraulic cylinder 161 is connected with the bearing seat of driven roller 13, and the boundary sensor 162 is installed on support frame 15, the boundary sensor 162 is located at the edge of steel belt 11, the hydraulic cylinder 161 and boundary sensor 162 are connected with hydraulic servo system, the driven roller 13 is tensioned by hydraulic cylinder 161 to the steel belt 11, the maximum moving speed of the steel belt 11 can reach 250Km / h, because the axis of driving roller 12 and driven roller 13 cannot be absolutely parallel during installation, so the steel belt 11 will appear offsetting or even separating at high speed, therefore, the boundary sensor 162 is used to measure the edge of steel belt 11 in real time and feed back to the hydraulic servo system to make rapid response, the hydraulic servo system controls hydraulic cylinder 161 to correct the steel belt 11, the bottom of the steel belt 11 is provided with air floating adsorption device 17, the air floating adsorption device 17 is provided with high-pressure-resistant porous plate, to ensure uniform air blowing and large output force, the air floating adsorption device 17 blows air to make the steel belt 11 float (the car wheel is pressed on the steel belt 11), so as to reduce the friction of the steel belt 11 during high-speed movement, reduce the jumping amount of the steel belt 11, ensure the stable operation of the steel belt 11, and cool the steel belt 11 by blowing air through the air floating adsorption device 17, the wheel drive unit 1 is installed on Y-axis moving assembly 2 through its support frame 15, the Y-axis moving assembly 2 drives the Y-direction movement of the wheel drive unit 1, the two groups of wheel drive unit 1 on the same side are installed on the same X-axis moving assembly 3 through corresponding Y-axis moving assembly 2, the two groups of X-axis moving assembly 3 are arranged in parallel, the X-direction movement of the wheel drive unit 1 is driven through X-axis moving assembly 3, and the system adapts to different wheelbase and track of different vehicle types through X-axis moving assembly 3 and Y-axis moving assembly 2.
[0012] The application adopts a high-speed movable moving belt floor to simulate ground effect, the moving belt floor adopts a limited length annular movable belt which moves at the same speed with the incoming flow, the effect of eliminating boundary layer can be achieved by accelerating the low-speed fluid near the wall surface, and then the accuracy of wind tunnel ground effect simulation and the reliability of test results are improved, the X-axis moving assembly 3 and the Y-axis moving assembly 2 are suitable for vehicle models with different wheelbase and track, the high-precision control of the vehicle wheels is realized through the real-time feedback of the boundary sensor 162, and the driving of the vehicle on the actual road surface is more truly restored.
[0013] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.
Claims
1. A wheel drive system for a five-belt moving floor system, characterized by: The application relates to a four-wheel driving unit, which comprises four sets of wheel driving units arranged oppositely in pairs, wherein the wheel driving unit comprises a driving roller, a driven roller and a steel belt, the driving roller and the driven roller are installed on a support frame, the steel belt is sleeved between the driving roller and the driven roller, the driving roller drives the steel belt to move through a driving device, the driven roller is provided with a tensioning and deviation rectifying device, the bottom of the steel belt is provided with an air floating and adsorbing device, the wheel driving unit is installed on a Y-axis moving assembly through the support frame, the Y-axis moving assembly drives the wheel driving unit to move in the Y direction, two sets of wheel driving units on the same side are installed on the same X-axis moving assembly through corresponding Y-axis moving assemblies, the two sets of X-axis moving assemblies are arranged in parallel, and the X-axis moving assemblies drive the wheel driving units to move in the X direction.
2. The wheel drive system for a five-belt movable floor system of claim 1, wherein: The tensioning and deviation rectifying device comprises a hydraulic cylinder and a boundary measuring sensor, the hydraulic cylinder is connected with a bearing seat of the driven roller, the boundary sensor is installed on a running frame, the boundary sensor is located at the edge of the steel belt, and the hydraulic cylinder and the boundary sensor are connected with a hydraulic servo system.
3. The wheel drive system for a five-belt movable floor system of claim 1, wherein: The air floating and adsorbing device is provided with a porous plate.