Test platform for testing interaction between aircraft tire and snow pavement

Abstract

The invention discloses a test platform for testing interaction between an aircraft tire and a snow pavement. The device comprises a roller shaft, a chain transmission assembly, a motor, a low-temperature LED lamp, trundles, a pavement simulation box support, a pavement simulation box, a mechanism rack, a hook, a steel wire rope, a bearing seat, a loading rack, aircraft tires, a low-temperature control box, a speed reducer, a sliding rail, a sliding block, a displacement sensor, a speed sensor and a pressure sensor. According to the invention, the interaction between the aircraft tires and the snow-polluted runway can be conveniently and quickly researched, various data parameters of the aircraft tires detected by various sensors are integrated, and the snow behavior is observed through the transparent pavement simulation box, so that the interaction between the aircraft tires and the snow-polluted runway can be reflected, and therefore, the working efficiency can be improved, and the cost can be reduced. The structural design is reasonable, the operation is convenient, the functions are complete, and the use requirements in different application scenes can be met.

Description

Technical Field

[0001] The invention belongs to the technical field of airport contaminated runway condition assessment and management, and in particular relates to a test platform for testing the interaction between aircraft tires and snow-covered road surfaces. Background Art

[0002] With the rapid development of the global aviation industry, the safety management of airport runways has become an important part of ensuring the safety of air transportation. Winter operations face unique challenges, one of the most important of which is snow and frozen pavement. During taxiing, takeoff and landing, the aircraft needs to use the friction between the aircraft tires and the pavement to achieve deceleration and directional control. However, when the airport pavement is covered with pollutants such as ice and snow, the bonding coefficient between the aircraft tires and the pavement will be greatly reduced, thereby reducing the stability of the aircraft during takeoff, landing and taxiing. Survey data shows that the risk of aircraft runoff on a flooded or snowy runway is 8 times that of a dry runway, and snowy runways account for more than 20% of contaminated runway accidents. Based on this, it is crucial to study the interaction between aircraft tires and snowy pavement.

[0003] However, the existing technology is mainly aimed at simulation and theoretical research on aircraft tires and contaminated pavement, lacking experimental research equipment and benches. Although some existing studies use the entire aircraft for testing, these methods cause problems such as excessive test costs and difficulty in conducting tests. In addition, it is difficult for simulation to accurately simulate the runway state under actual snow-covered conditions, especially in a complex environment where multiple pollutants are mixed, and the physical properties of snow have a huge impact on contaminated runways due to changes in environmental factors such as temperature and humidity. In addition, the existing runway assessment methods are mostly based on experiments under idealized or simple conditions, lacking effective simulation of contaminated snow pavement, resulting in the assessment results being difficult to reflect the risks in real operation, and therefore cannot meet the current research on aircraft tires and snow-contaminated pavement.

[0004] Therefore, there is an urgent need for an experimental platform that can accurately simulate snow-covered contaminated runways and study the interaction between aircraft tires and snowy pavement, so as to study the evolution behavior of snow and the impact of the interaction between tires and snowy runways, and provide a scientific basis for the safe management of airport contaminated runways and snow removal. Summary of the invention

[0005] In order to solve the above problems, the object of the present invention is to provide a test platform for testing the interaction between aircraft tires and snow-covered road surfaces.

[0006] In order to achieve the above-mentioned purpose, the test platform for testing the interaction between aircraft tires and snow-covered road surfaces provided by the present invention includes a roller shaft, a chain transmission assembly, a motor, a low-temperature LED lamp, a caster, a road surface simulation box support, a road surface simulation box, a mechanism stand, a hook, a wire rope, a bearing seat, a loading stand, an aircraft tire, a low-temperature control box, a reducer, a slide rail, a slider, a displacement sensor, a speed sensor and a pressure sensor; wherein the mechanism stand is a cubic frame structure, a motor support frame is provided on the outside of one side, a caster is provided at each of the four corners of the lower end, a slide rail is installed in the middle of each of the two side surfaces in a vertical direction, and a bearing seat is installed in the middle of each of the two upper side surfaces; the two ends of the roller shaft are supported by two bearing seats respectively; the motor is arranged on the motor support frame, and the output end is connected to the reducer; the chain transmission assembly includes a driven sprocket, a driving chain The invention relates to a wheel and a chain sleeved on the driven sprocket and the driving sprocket; the output end of the reducer is connected to the axle of the driving sprocket, and the axle of the driven sprocket is connected to one end of the drum shaft; the low-temperature control box is arranged at the inner lower part of the mechanism stand, the upper end of which is open, and a low-temperature LED lamp and a pavement simulation box support are arranged inside; the pavement simulation box is fixed on the pavement simulation box support, and the upper end is open; the upper end of the steel wire rope is fixed to the middle part of the drum shaft, and the lower end is connected to the loading stand through a hook; the aircraft tire is fixed on the loading stand, and corresponds to the position of the pavement simulation box up and down; a slider that slides with the slide rail is respectively installed on the upper part of the two side surfaces of the loading stand; the displacement sensor is installed at the upper end of the mechanism stand to detect the displacement of the aircraft tire; the speed sensor is installed at the lower part of the mechanism stand to detect the falling speed of the aircraft tire; the pressure sensor is embedded in the inside of the aircraft tire.

[0007] The test platform for testing the interaction between aircraft tires and snow-covered road surfaces also includes two stoppers respectively installed at the upper and lower ends of the slide rail.

[0008] The bottom surface of the pavement simulation box adopts a concrete casting plate with the same material as the airport runway as a simulated runway, and the other four sides adopt transparent acrylic plates.

[0009] The low-temperature control box is made of a transparent acrylic plate, with refrigeration brass tubes laid on the two side surfaces, the back surface and the bottom surface, a transparent observation window on the front surface, and a low-temperature LED lamp installed on the bottom.

[0010] The caster is provided with a brake device.

[0011] The force sensors are embedded in the tread and shoulder parts of the aircraft tire.

[0012] The test platform provided by the present invention for testing the interaction between aircraft tires and snow-covered road surfaces has the following features:

[0013] Beneficial effects:

[0014] 1. It can conveniently and quickly study the interaction between aircraft tires and snow-contaminated runways, integrate various sensors to detect various data parameters of aircraft tires, and observe the properties of snow through a transparent pavement simulation box to reflect the interaction between aircraft tires and snow-contaminated pavements, thereby improving work efficiency and reducing costs.

[0015] 2. It can simulate the conditions of different types of snow pollutants on the runway surface, and consider factors such as different temperatures and humidity, to study the various types of snow and the evolution characteristics of snow properties.

[0016] 3. The structure is designed reasonably, the operation is convenient, and the functions are complete, which can meet the use requirements in different application scenarios.

[0017] 4. It eliminates the high cost, cumbersome test and the disadvantage of snow retention in direct tire snow-covered road test, and can comprehensively test the interaction between aircraft tires and snow pollutants and the evolution characteristics of snow properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A front view of a test platform provided by the present invention for testing the interaction between aircraft tires and snow-covered road surfaces;

[0019] Figure 2 A side view of a test platform provided by the present invention for testing the interaction between aircraft tires and snow-covered road surfaces;

[0020] Figure 3 A top view of a test platform provided by the present invention for testing the interaction between aircraft tires and snow-covered road surfaces;

[0021] Figure 4 A three-dimensional diagram of a test platform provided by the present invention for testing the interaction between aircraft tires and snow-covered road surfaces;

[0022] Figure 5 A working flow chart of a test platform for testing the interaction between aircraft tires and snow-covered road surfaces provided by the present invention. DETAILED DESCRIPTION

[0023] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1 to 4As shown, the test platform for testing the interaction between aircraft tires and snow-covered road surfaces provided by the present invention includes a roller shaft 1, a chain transmission assembly, a motor 3, a low-temperature LED lamp 4, a caster 5, a road surface simulation box support 6, a road surface simulation box 7, a mechanism stand 8, a hook 9, a wire rope 10, a bearing seat 11, a loading stand 14, an aircraft tire 15, a low-temperature control box 16, a reducer 17, a slide rail 18, a slider 19, a displacement sensor, a speed sensor and a pressure sensor; wherein the mechanism stand 8 is a cubic frame structure, a motor support frame is provided on the outside of one side, a caster 5 is provided at the four corners of the lower end, a slide rail 18 is installed in the middle of the two side surfaces in the vertical direction, and a bearing seat 11 is installed in the middle of the two upper side surfaces; the two ends of the roller shaft 1 are supported by two bearing seats 11 respectively; the motor 3 is arranged on the motor support frame, and the output end is connected to the reducer 17; the chain transmission assembly includes a driven sprocket 12, a driving sprocket 13 and a driven sprocket 14 sleeved on the driven sprocket 12, a driving sprocket 13 and a driven sprocket 14 sleeved on the driven sprocket 12. The chain 2 on the driving sprocket 12 and the driving sprocket 13; the output end of the reducer 17 is connected to the axle of the driving sprocket 13, and the axle of the driven sprocket 12 is connected to one end of the drum shaft 1; the low-temperature control box 16 is arranged at the inner lower part of the mechanism stand 8, the upper end is open, and a low-temperature LED lamp 4 and a pavement simulation box support 6 are arranged inside; the pavement simulation box 7 is fixed on the pavement simulation box support 6, and the upper end is open; the upper end of the wire rope 10 is fixed to the middle of the drum shaft 1, and the lower end is connected to the loading stand 14 through the hook 9; the aircraft tire 15 is fixed on the loading stand 14 and corresponds to the position of the pavement simulation box 7 up and down; a slider 19 that slides with the slide rail 18 is respectively installed on the upper side of the two side surfaces of the loading stand 14; the displacement sensor is installed at the upper end of the mechanism stand 8 to detect the displacement size of the aircraft tire 15; the speed sensor is installed at the lower part of the mechanism stand 8 to detect the falling speed of the aircraft tire 15; the pressure sensor is embedded in the inside of the aircraft tire 15.

[0025] The test platform for testing the interaction between aircraft tires and snow-covered road surfaces further comprises two stoppers respectively installed at the upper and lower ends of the slide rail 18 to prevent the slider 19 and its upper components from falling off the slide rail 18 .

[0026] The bottom surface of the pavement simulation box 7 uses a concrete cast plate with the same material as the airport runway as a simulated runway, and the other four sides use transparent acrylic plates to facilitate experimenters to observe the interaction between tires and snow. It can be used to simulate the adhesion of snow pollutants, the distribution of snow on the runway surface, including the uniformity and unevenness of snow, which is closer to the actual state of snow on the runway, and can also simulate the different types of snow states under different weather conditions as time evolves and the temperature changes inside the low-temperature control box 16.

[0027] The low-temperature control box 16 is made of a transparent acrylic plate, with refrigeration brass tubes laid on the two side surfaces, the back surface and the bottom surface, a transparent observation window on the front surface, and a low-temperature LED lamp 4 installed at the bottom to illuminate the entire low-temperature control box 16.

[0028] The caster 5 is provided with a brake device. When it is not necessary to move or when conducting experiments, the brake device on the caster 5 is placed in a brake state to ensure the stability of the entire platform.

[0029] The force sensors are embedded in the tread and shoulder portions of the aircraft tire 15 .

[0030] The working principle of the test platform for testing the interaction between aircraft tires and snow-covered road surfaces provided by the present invention is described as follows:

[0031] like Figure 5 As shown, firstly, the caster 5 is in a braking state, the low temperature control box 16 and the low temperature LED lamp 4 are turned on, the temperature in the low temperature control box 16 is adjusted to the required temperature, and then the snow is placed in the pavement simulation box 7, and then the motor 3 is turned on, and the motor 3 is adjusted to the required speed through the reducer 17, and then the power is transmitted from the driving sprocket 13 to the driven sprocket 12 through the chain 2, and the driven sprocket 12 transmits the power to the roller shaft 1, and the roller shaft 1 moves the aircraft tire 15 up and down by winding or releasing the wire rope 19. The displacement sensor on the upper part of the mechanism stand 8 measures the displacement change of the aircraft tire 15, the speed sensor on the lower part of the mechanism stand 8 detects the falling speed of the aircraft tire 15, and the pressure sensor embedded in the aircraft tire 15 measures the numerical change of the pressure.

[0032] The low-temperature LED lamp 4 can illuminate the entire low-temperature control box 16, and the experimenter can observe the interaction between the aircraft tire 15 and the simulated pavement through the pavement simulation box 7 made of a transparent acrylic plate.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A test platform for testing the interaction between aircraft tires and snowy road surfaces, characterized in that: The test platform comprises a roller shaft (1), a chain drive assembly, a motor (3), a low-temperature LED lamp (4), a caster (5), a pavement simulation box support (6), a pavement simulation box (7), a mechanism stand (8), a hook (9), a wire rope (10), a bearing seat (11), a loading stand (14), an aircraft tire (15), a low-temperature control box (16), a reducer (17), a slide rail (18), a slider (19), a displacement sensor, a speed sensor and a pressure sensor; wherein the mechanism stand (8) is a cubic frame The invention discloses a structure in which a motor support frame is arranged outside one side, a caster (5) is arranged at each of the four corners of the lower end, a slide rail (18) is arranged in the middle of each of the two side frames in a vertical direction, and a bearing seat (11) is arranged in the middle of each of the two upper side frames; the two ends of the roller shaft (1) are supported by the two bearing seats (11); the motor (3) is arranged on the motor support frame, and the output end is connected to the reducer (17); the chain transmission assembly comprises a driven sprocket (12), a driving sprocket (13) and a sprocket sleeved on the driven sprocket (12) and the driving sprocket (13); ) on the chain (2); the output end of the reducer (17) is connected to the axle of the driving sprocket (13), and the axle of the driven sprocket (12) is connected to one end of the drum shaft (1); the low temperature control box (16) is arranged in the lower inner part of the mechanism stand (8), the upper end is open, and a low temperature LED lamp (4) and a road surface simulation box support (6) are arranged inside; the road surface simulation box (7) is fixed on the road surface simulation box support (6), and the upper end is open; the upper end of the steel wire rope (10) is fixed to the middle part of the drum shaft (1), and the lower end is connected to the drum shaft (1) through a hook (9) A loading platform (14); an aircraft tire (15) is fixed on the loading platform (14) and corresponds to the position of a road surface simulation box (7) in the upper and lower parts; a slider (19) slidably matched with a slide rail (18) is respectively installed on the upper part of the two side surfaces of the loading platform (14); a displacement sensor is installed at the upper end of the mechanism platform (8) for detecting the displacement size of the aircraft tire (15); a speed sensor is installed at the lower part of the mechanism platform (8) for detecting the falling speed of the aircraft tire (15); and a pressure sensor is embedded in the interior of the aircraft tire (15).

2. The test platform for testing the interaction between aircraft tires and snowy road surfaces according to claim 1, characterized in that: The test platform for testing the interaction between aircraft tires and snow-covered road surfaces also includes two stoppers respectively installed at the upper and lower ends of the slide rail (18).

3. The test platform for testing the interaction between aircraft tires and snowy road surfaces according to claim 1, characterized in that: The bottom surface of the pavement simulation box (7) is made of a concrete casting plate with the same material as the airport runway as a simulated runway, and the other four side surfaces are made of transparent acrylic plates.

4. The test platform for testing the interaction between aircraft tires and snowy road surfaces according to claim 1, characterized in that: The low-temperature control box (16) is made of a transparent acrylic plate, and refrigeration brass tubes are laid on the two side surfaces, the back surface and the bottom surface. The front surface is a transparent observation window, and a low-temperature LED lamp (4) is installed at the bottom.

5. The test platform for testing the interaction between aircraft tires and snowy road surfaces according to claim 1, characterized in that: The caster (5) is provided with a brake device.

6. The test platform for testing the interaction between aircraft tires and snowy road surfaces according to claim 1, characterized in that: The force sensor is embedded in the tread and shoulder portion of the aircraft tire (15).

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