Tyre splashing test device

Abstract

The invention provides a tyre splashing test device. A swing rod rotation mechanism is mounted below the crossbeam of a low portal frame. A pre-rotating mechanism is mounted below the crossbeam of a high portal frame. A buffer mechanism is fixed on a ground rail outside the low portal frame. A water trough is arranged below the swing rod rotation mechanism. One end of a lifting cable is connected with an electric winch, and the other end is connected with a swing rod. A high-speed image camera is configured at the front surface of the swing rod for recording a splashing form and a splashing angle of the tire in the swinging direction of the swing rod. The other high-speed image camera is configured at the side surface of the swing rod so that the projection direction of the high-speed image camera is perpendicular with the movement plane of the swing rod. The optical axis of the high-speed image camera is level with a horizontal plane. The other high-speed image camera is used for recording the splashing state, the splashing angle and an initial splashing position. According to the tyre splashing test device, through adjusting a ratio between the rotating speed of the tire and a water entering velocity, tire splashing in different water slippage states can be simulated. Furthermore details in tire splashing are accurately acquired through the high-speed image cameras, wherein the details comprise the initial splashing position, the splashing form and the splashing angle.

Description

technical field [0001] The invention relates to the field of water splashing tests of the whole aircraft, in particular to a test device for indoor water splashing tests of tires and for measuring and evaluating the water splashing characteristics of tires. Background technique [0002] When a vehicle is driving on a wet road in rainy days, the water splashed by its tires will affect the visibility of the vehicles behind and on both sides, thereby seriously affecting driving safety. In addition, the splashing water will also affect pedestrians on both sides. [0003] When an aircraft takes off and lands on a flooded runway, the water splashed by the tires may enter the engine intake, which will have a very important impact on the aircraft structure and performance during takeoff and landing, and will cause serious flight accidents. [0004] However, the research on tire splashing is all carried out through large-scale outdoor real vehicle or aircraft full-machine tests. The...

AI Technical Summary

Problems solved by technology

[0002] When a vehicle is driving on a wet road in a rainy day, the water splashed by its tires will affect the visibility of the vehicles behind and on both sides, thereby seriously affecting driving safety. In addition, the splashing water will also affect pedestrians on both sides

[0003] When an aircraft takes off and lands on a flooded runway, the water splashed by the tires may enter the engine intake, which will have a very important impact on the aircraft structure and performance during takeoff and landing, and will cause serious flight accidents

[0004] However, the research on tire splashing is all carried out through large-scale outdoor real vehicle or aircraft full-machine tests.

The water splashing test of the real vehicle or the whole machine of the aircraft needs to be carried out outdoors. A test pool with a length of several meters to hundreds of meters is built on a straight test road, and the splashing of the vehicle or aircraft when driving in the test pool is observed and recorded by the camera. Water form, evaluating the water splash performance of tires requires a lot of manpower and material resources

[0005] The problems existing in the real vehicle or full-machine test are: 1. In the outdoor environment, the flatness of the runway, the test environment, and the wind direction and speed will seriously affect the test results

2. Due to the existence of tire hydroplaning when the tire is running on the water-logged road, the linear velocity and rotational speed of the tire in the hydroplaning state are not proportional. The water splashing of the tire in the hydroplaning state is difficult to control and measure through the actual vehicle or the whole machine test. It is also difficult to guarantee the safety of the splash test under the water state

3. Large-scale tests are not easy to control the water entry speed, tire speed and water accumulation depth of the tire, so it is difficult to carry out detailed measurement and research on tire splash water

[0006] At present, there is no test device and corresponding test method for indoor tire splash test. Patent No. 102072804A provides a high-precision wheel pre-rotation mechanism for aircraft landing gear drop test, which can make the tire in the drop test. Rotation at the predetermined speed, but the tire does not have a horizontal movement speed during the test, which does not meet the test requirements for tire splashing

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