An adjustable snowing device applied to a low-speed wind tunnel

Abstract

The application belongs to the field of wind tunnel test, and particularly relates to an adjustable snow scattering device applied to a low-speed wind tunnel. The device comprises a frame beam support, a snow scattering mechanism and a snow containing vehicle. The frame beam support is provided with a transverse track. The snow containing vehicle comprises a vehicle body frame and a snow containing groove. The bottom of the vehicle body frame is provided with a guide wheel which is located on the track and enables the snow containing vehicle to move transversely along the track. The bottom of the snow containing groove is provided with a plurality of sieve holes arranged in an array. The upper ends of the two side walls of the snow containing groove are hingedly connected to the upper two sides of the vehicle body frame. The snow scattering mechanism is fixedly connected to the side of the vehicle body frame, and the driving end of the snow scattering mechanism is hingedly connected to the snow containing groove. The snow scattering mechanism reciprocatingly vibrates the snow containing groove at a certain rate to realize snow scattering. The device has a simple structure, can realize snowfall simulation environment with different intensities, coverage areas and areas in the low-speed wind tunnel, meets the requirements of low-speed wind tunnel snowfall test, and improves the test efficiency.

Description

Technical Field

[0001] The invention belongs to the field of wind tunnel testing, and in particular relates to an adjustable snow spreading device used in a low-speed wind tunnel. Background Art

[0002] During their use, various equipment and products inevitably encounter complex environments, such as climate and mechanics. These environments can alter the physical or chemical properties of the materials they contain, degrading their performance, limiting their functionality, and threatening their safety. Snow, a particularly harsh and complex climate, can severely impact the normal operation of equipment. Therefore, it is essential to conduct snowfall simulation tests in low-speed wind tunnels to obtain simulation data for relevant design.

[0003] Currently, wind tunnel snowfall simulations often rely on snow guns or water jets. These methods place significant demands on wind tunnel dimensions and temperature and humidity, such as jet height, internal temperature and humidity, and spray water temperature, leading to high investment and operating costs. Furthermore, snowfall simulations often require varying snowfall coverage, area, and intensity, depending on test requirements. This places significant demands on the adjustable snowfall device. Summary of the Invention

[0004] In response to the above problems, the purpose of the present invention is to provide an adjustable snow spreading device for use in low-speed wind tunnels, which can achieve snowfall simulation environments with different intensities, coverage areas and areas in low-speed wind tunnels, and meet the requirements of low-speed wind tunnel snowfall tests.

[0005] The technical solution adopted by the present invention is as follows: an adjustable snow-spreading device for use in a low-speed wind tunnel, comprising a frame beam bracket, a snow-spreading mechanism and a snow-collecting vehicle, wherein a transverse track is installed on the frame beam bracket, and the snow-collecting vehicle comprises a vehicle body frame and a snow-collecting trough, a guide wheel is installed at the bottom of the vehicle body frame, the guide wheel is located on the track, and the snow-collecting vehicle moves laterally along the track, a plurality of sieve holes arranged in an array are provided at the bottom of the snow-collecting trough, the upper ends of the two side walls of the snow-collecting trough are hinged to the upper sides of the vehicle body frame, the snow-spreading mechanism is fixedly connected to the side of the vehicle body frame, the driving end of the snow-spreading mechanism is hinged to the snow-collecting trough, and the snow-spreading mechanism causes the snow-collecting trough to vibrate back and forth at a certain rate to achieve snow-spreading.

[0006] Furthermore, the size of the simulated snowflakes can be adjusted by replacing screens with various diameters of mesh, the width of snowfall can be adjusted by covering the meshes of different widths at corresponding positions on the bottom of the snow-collecting trough, and the position of snowfall can be adjusted by moving the position of the snow-collecting vehicle on the track.

[0007] Furthermore, the snow spreading mechanism comprises two groups symmetrically located on both sides of the snow containing trough and fixedly connected to the vehicle body frame, and the lower ends of both sides of the snow containing trough are respectively hinged to the driving ends of the two groups of snow spreading mechanisms.

[0008] Furthermore, the snow-spreading mechanism includes a motor, a reducer, an eccentric slider mechanism and a connecting rod. The motor housing is fixedly connected to one side of the vehicle body frame, the output shaft of the motor is connected to the eccentric slider mechanism through the reducer, the eccentric slider mechanism is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the lower end of the snow trough on this side, driving the snow trough to vibrate reciprocatingly to achieve snow spreading, and the vibration frequency is adjusted by adjusting the frequency of the motor, thereby adjusting the snowfall intensity.

[0009] The beneficial effects of the present invention are as follows: the present invention has a simple structure and can realize snowfall simulation environments of different intensities, coverage areas and areas in a low-speed wind tunnel, meet the requirements of low-speed wind tunnel snowfall tests, and improve test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic front view of the structure of the device proposed in the present invention;

[0011] Figure 2 This is a left side view schematically showing the structure of the device proposed in the present invention;

[0012] Figure 3 A schematic top view of the structure of the device proposed in the present invention;

[0013] Figure 4 for Figure 1 AA section view;

[0014] Figure 5 for Figure 3 BB cross-sectional view;

[0015] Figure 6 for Figure 3 C-direction view;

[0016] Figure 7 for Figure 3 A partial enlarged view of

[0017] Figure 8 for Figure 6 D-section view. DETAILED DESCRIPTION

[0018] A specific implementation manner is given below in conjunction with the accompanying drawings, and the technical solution of the present invention is further illustrated through the description of this implementation manner.

[0019] Example 1

[0020] An adjustable snow spreading device for low-speed wind tunnels includes a frame beam support 1, a snow spreading mechanism 2, and a snow collecting vehicle 3. A transverse track 4 is installed on the frame beam support 1. The snow collecting vehicle 3 includes a vehicle frame 5 and a snow collecting trough 6. A guide wheel 7 is installed at the bottom of the vehicle frame 5. The guide wheel 7 is located on the track 4. The snow collecting vehicle 3 moves laterally along the track 4. A plurality of sieve holes arranged in an array are opened at the bottom of the snow collecting trough 6. The size of the simulated snowflakes can be adjusted by replacing sieves with sieve holes of various diameters. The width of snowfall can be adjusted by covering the sieve holes of corresponding positions of different widths at the bottom of the snow collecting trough. The snowfall position can be adjusted by moving the position of the snow collecting vehicle on the track. The upper ends of the two side walls 8 of 6 are hinged to the upper sides of the vehicle body frame 5. The snow-spreading mechanism 2 includes two groups of motors 9, two groups of reducers 10, two groups of eccentric slider mechanisms 11 and two groups of connecting rods 12. The outer casings of the two groups of motors 9 are fixedly connected to the two sides of the vehicle body frame 5 respectively. The output shaft of each group of motors 9 is connected to the eccentric slider mechanism 11 on that side through a group of reducers 10. The eccentric slider mechanism 11 on that side is hinged to one end of the connecting rod 12 on that side, and the other end of the connecting rod 12 on this side is hinged to the lower end of the snow-containing trough 6 on this side. The two groups of motors 9 drive the snow-containing trough 6 to vibrate reciprocatingly to achieve snow spreading, and the vibration frequency is adjusted by adjusting the frequency of the two groups of motors 9, thereby adjusting the snowfall intensity.

[0021] The use process of this snow spreading device mainly includes the following steps:

[0022] Step 1: Load the prepared snow into the snow collecting vehicle 3, and adjust the amount of snowfall by adjusting the size of the sieve holes at the bottom of the snow collecting trough, and adjust the width of snowfall by covering the sieve holes at corresponding positions of different widths at the bottom of the snow collecting trough;

[0023] Step 2: Adjust the snowfall position by moving the snow transport vehicle on the track.

[0024] Step 3: Adjust the motor operating frequency to adjust the vibration frequency and then adjust the snowfall intensity.

Claims

1. An adjustable snow spreading device for use in a low-speed wind tunnel, comprising a frame beam support, a snow spreading mechanism, and a snow collecting vehicle, characterized in that: The snow-spreading mechanism is fixedly connected to the side surface of the vehicle body frame, and the driving end of the snow-spreading mechanism is hinged to the snow-collecting trough. The snow-spreading mechanism causes the snow-collecting trough to vibrate back and forth at a certain rate to achieve snow-spreading. The snow-spreading mechanism includes a motor, a reducer, an eccentric slider mechanism and a connecting rod. The motor housing is fixedly connected to one side of the vehicle body frame, the output shaft of the motor is connected to the eccentric slider mechanism through the reducer, the eccentric slider mechanism is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the lower end of the snow-collecting trough on this side, driving the snow-collecting trough to vibrate reciprocally to achieve snow-spreading, and adjusting the vibration frequency by adjusting the frequency of the motor, thereby adjusting the snowfall intensity.

2. The adjustable snow spreading device for use in a low-speed wind tunnel according to claim 1, characterized in that: The size of the simulated snowflakes is adjusted by adjusting the size of the sieve holes at the bottom of the snow-containing trough, the width of the snowfall is adjusted by covering the sieve holes at corresponding positions of different widths at the bottom of the snow-containing trough, and the position of the snowfall is adjusted by moving the position of the snow-containing vehicle on the track.

3. The adjustable snow spreading device for use in a low-speed wind tunnel according to claim 2, characterized in that: The snow spreading mechanism comprises two groups symmetrically located on both sides of the snow holding trough and fixedly connected to the vehicle frame. The lower ends of both sides of the snow holding trough are respectively hinged to the driving ends of the two groups of snow spreading mechanisms.

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