Novel sand washing test mechanism

Abstract

The invention discloses a novel sand washing test mechanism, which is used for carrying out a sand washing test on an impeller of an unmanned aerial vehicle, and is characterized by comprising a sand storage tank for storing sand grains, the feeding mechanism is communicated with the first sand outlet; the top end of the sand discharging channel is communicated with the feeding barrel; and a sand outlet pipe, a casing and a gas hood. According to the sand washing device, sand grains in the sand storage tank sequentially pass through the feeding barrel and the sand discharging channel, then enter the sand outlet pipe and are sprayed to the rotating impeller in the casing through the sand outlet pipe, so that the sand washing test on the impeller in the rotating process of the impeller is realized, and the problems in the prior art are solved.

Description

Technical Field

[0001] The invention relates to a sand blasting test mechanism. Background Art

[0002] UAVs may encounter dusty environments during flight, so it is necessary to determine the tolerance of UAVs, especially impellers, to sand particles carried by wind or airflow during flight. The existing technology lacks corresponding test equipment. Summary of the invention

[0003] The purpose of the present invention is to provide a method for performing a sand flushing test on an impeller of a drone.

[0004] In order to solve the above problems, the present invention provides a new sand blasting test mechanism for performing sand blasting test on the impeller of a UAV, which is characterized by comprising:

[0005] A sand storage tank storing sand particles, wherein a first sand outlet is provided at the bottom of the sand storage tank;

[0006] A feeding mechanism connected to the first sand outlet, the feeding mechanism comprising a cylindrical, horizontally arranged feeding cylinder, and a feeding shaft located in the feeding cylinder, the feeding shaft is provided with an external thread, the sand grains are transmitted between the thread line and the inside of the feeding cylinder, and the feeding shaft is also provided with a driving mechanism for driving the feeding shaft to rotate;

[0007] A sand discharging channel connected to the feeding tube at the top, wherein the sand discharging channel is a pipe-like structure and is vertically arranged;

[0008] A sand outlet pipe, the sand outlet pipe is connected to the bottom end of the sand discharge channel, and a second sand outlet is provided at a first free end thereof, and sand particles in the sand outlet pipe are ejected through the second sand outlet under the action of high-pressure gas;

[0009] A casing, the casing is a hollow shell-like structure, comprising a first side wall and a second side wall which are oppositely and vertically arranged, the rotating shaft of the impeller being rotatably mounted on the second side wall and at least partially passing through the second side wall to be connected with a driving device outside the casing;

[0010] The air hood is a cylindrical structure provided with a hollow cavity structure. The air hood is composed of at least two parts, including a first hood body located inside the casing and a second hood body located outside the casing. Both ends of the first hood body are mounted on the inner walls of the first side wall and the second side wall. The second hood body is located outside the casing, one end of which is closed and the other end is mounted on the outer wall of the first side wall. The first free end of the sand outlet pipe at least partially extends into the second hood body. The first side wall and the second side wall are located inside the air hood and are provided with a plurality of through holes.

[0011] As a further improvement of the present invention, the sand outlet pipe has a sandblasting end extending into the second cover body, and the sandblasting end is provided with a first end and a second end in sequence from front to back, the first end is vertically arranged, and the second end is horizontally arranged, and both are tubular structures, the second end is closed, and the second sand outlet is a structure in which the second end is provided with a plurality of openings in the circumferential direction of the second end for leaking sand particles.

[0012] As a further improvement of the present invention, the sand outlet pipe includes a Laval pipe and a hose, the hose is connected to the Laval pipe, two of the hoses are provided and are symmetrically arranged up and down, and the sandblasting end is provided on the hose.

[0013] As a further improvement of the present invention, both ends of the rotating shaft of the impeller are rotatably connected to the first side wall and the second side wall respectively, and the through hole divides the first side wall and / or the second side wall into a circle of spoke-like structures arranged along the circumferential direction.

[0014] As a further improvement of the present invention, it also includes a sand removal cover, which is a semi-closed shell structure with an opening at one end, and the open end is installed on the second side wall. The part of the second side wall located inside the sand removal cover is provided with the through hole, and the through hole divides the second side wall into a circle of spoke-shaped structures arranged along the circumferential direction.

[0015] As a further improvement of the present invention, the impeller rotating shaft passes through the side wall of the sand discharge cover in a rotatable manner and is connected to a driving device outside the sand discharge cover.

[0016] As a further improvement of the present invention, a labyrinth seal is used at the rotation connection portion between the rotating shaft of the impeller and the first side wall, the second side wall and the side wall of the sand discharge cover.

[0017] As a further improvement of the present invention, a coupling is arranged in the sand removal cover, and both ends of the coupling have protruding ends which are rotatably connected and extend out of the side wall of the sand removal cover, and the rotating shaft and the driving shaft of the driving device are respectively transmission-connected to the two protruding ends.

[0018] As a further improvement of the present invention, the driving device is a motor.

[0019] As a further improvement of the present invention, the blowing device includes an air pump and a blowing pipe, the blowing pipe is connected to the sand outlet pipe, the blowing pipe is connected to the sand storage tank through a bypass pipe, and a balancing valve and a pressure gauge close to the sand storage tank are provided on the coil, and the pressure gauge can control the opening and closing of the balancing valve, thereby adjusting the gas pressure value flowing into the sand storage tank.

[0020] The beneficial effect of the present invention lies in that, in the present invention, the sand particles in the sand storage tank pass through the feeding barrel and the sand discharge channel in sequence and then enter the sand outlet pipe, and are sprayed onto the impeller rotating in the casing through the sand outlet pipe, thereby realizing the sand flushing test of the impeller during the rotation of the impeller, and solving the problems encountered in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the sandblasting end;

[0023] In the figure: 102-sand storage tank; 104-feeding barrel; 106-feeding shaft; 108-sand discharge channel; 112-blowing device; 200-impeller; 202-sand outlet pipe; 204-sand outlet; 206-casing; 208-air hood; 210-first hood body; 214-sandblasting end; 216-second hood body; 218-sand discharge hood; 220-Laval tube; 222-hose. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0025] like Figure 1-2 As shown, the present invention includes a sand storage tank 102 storing sand particles, and a first sand outlet is provided at the bottom of the sand storage tank 102;

[0026] A feeding mechanism connected to the first sand outlet, the feeding mechanism comprising a cylindrical, horizontally arranged feeding cylinder 104, and a feeding shaft 106 located in the feeding cylinder 104, the feeding shaft 106 is provided with an external thread, the sand grains are transmitted between the thread line and the inside of the feeding cylinder 104, and the feeding shaft 106 is also provided with a driving mechanism for driving the rotation thereof;

[0027] A sand discharging channel 108 connected to the feeding tube 104 at the top, wherein the sand discharging channel 108 is a pipe-like structure and is vertically arranged;

[0028] A sand outlet pipe 202, wherein the sand outlet pipe 202 is connected to the bottom end of the sand outlet channel 108, and a second sand outlet is provided at a first free end thereof, and sand particles in the sand outlet pipe 202 are ejected through the second sand outlet under the action of high-pressure gas;

[0029] The casing 206 is a hollow shell-like structure, which includes a first side wall and a second side wall that are oppositely and vertically arranged. The rotating shaft of the impeller 200 is rotatably mounted on the second side wall and at least partially passes through the second side wall to be connected to a driving device outside the casing 206;

[0030] The gas hood 208 is a cylindrical structure provided with a hollow cavity structure. The gas hood 208 is composed of at least two parts, including a first cover body 210 located inside the casing 206 and a second cover body 216 located outside the casing 206. Both ends of the first cover body 210 are installed on the inner walls of the first side wall and the second side wall. The second cover body 216 is located outside the casing 206, one end of which is closed and the other end is installed on the outer wall of the first side wall. The first free end of the sand outlet pipe 202 at least partially extends into the second cover body 216. The parts of the first side wall and the second side wall located inside the gas hood 208 are provided with a plurality of through holes.

[0031] In the present invention, the sand in the sand storage tank 102 passes through the feeding tube 104 and the sand discharge channel 108 in sequence and then enters the sand outlet pipe 202, and is sprayed onto the impeller 200 rotating in the casing 206 through the sand outlet pipe 202, thereby realizing the sand flushing test of the impeller 200 during the rotation of the impeller 200, and solving the problems encountered in the prior art.

[0032] As a further improvement of the present invention, the sand outlet pipe 202 has a sandblasting end 214 extending into the second cover body 216, and the sandblasting end 214 is provided with a first end and a second end in sequence from front to back, the first end is vertically arranged, and the second end is horizontally arranged, and both are tubular structures, the second end is closed, and the second sand outlet is a structure in which the second end is provided with a plurality of openings in the circumferential direction of the second end for leaking sand particles.

[0033] In this embodiment, the sand particles are not directly rushed into the air hood 208, but the second end of the sand outlet pipe 202 is closed, and the sand particles hit the second end and then ejected through the opening in the circumferential direction of the second end, thereby making the sand particles more uniform and simulating the natural environment.

[0034] As a further improvement of the present invention, the sand outlet pipe 202 includes a Laval tube 220 and a hose 222 . The hose 222 is connected to the Laval tube, two of which are symmetrically arranged up and down, and the sandblasting end 214 is arranged on the hose 222 .

[0035] The structure of the Laval tube 220 and the hose 222 is provided to ensure that the ejected sand particles are more uniform.

[0036] As a further improvement of the present invention, both ends of the rotating shaft of the impeller 200 are rotatably connected to the first side wall and the second side wall respectively, and the through hole divides the first side wall and / or the second side wall into a circle of spoke-like structures arranged along the circumferential direction.

[0037] As a further improvement of the present invention, it also includes a sand removal cover 218, which is a semi-closed shell structure with an opening at one end, and the open end is installed on the second side wall. The part of the second side wall located inside the sand removal cover 218 is provided with the through hole, and the through hole divides the second side wall into a circle of spoke-like structures arranged along the circumferential direction.

[0038] The spoke-shaped structure can ensure that the rotating shaft is well installed and fixed, and that the sand inlet and outlet are large enough.

[0039] As a further improvement of the present invention, the rotating shaft of the impeller 200 rotatably passes through the side wall of the sand removal cover 218 and is connected to a driving device outside the sand removal cover 218 .

[0040] In this embodiment of the present invention, the rotation of the rotating shaft is achieved by connecting the rotating shaft to an external driving device.

[0041] As a further improvement of the present invention, a labyrinth seal is used at the rotation connection portion between the rotating shaft of the impeller 200 and the first side wall, the second side wall and the side wall of the sand discharge cover 218 .

[0042] In this embodiment, a labyrinth seal is used to ensure the sealing of the rotating shaft and prevent sand particles from affecting the rotation of the rotating shaft.

[0043] As a further improvement of the present invention, a coupling 230 is provided in the sand removal cover 218, and both ends of the coupling 230 have protruding ends that are rotatably connected and extend out of the side walls of the sand removal cover 218, and the rotating shaft and the driving shaft of the driving device are respectively transmission-connected to the two protruding ends.

[0044] The coupling is used to prevent the rotating shaft and the driving shaft from entering the sand discharge cover 218, reduce the contact between the two and the sand particles, and improve the movement stability and service life of the rotating shaft and the driving shaft.

[0045] As a further improvement of the present invention, the driving device is a motor.

[0046] An electric motor is used as the driving device, and the power output is stable and adjustable.

[0047] As a further improvement of the present invention, it also includes a blowing device 112, which includes an air pump and a blowing pipe. The blowing pipe is connected to the sand outlet pipe 202, and the blowing pipe is connected to the sand storage tank 102 through a bypass pipe. A balancing valve and a pressure gauge close to the sand storage tank 102 are provided on the bypass pipe. The pressure gauge can control the opening and closing of the balancing valve, thereby adjusting the gas pressure value flowing into the sand storage tank 102.

[0048] The purpose of setting a bypass pipe is to ensure that the air pressure in the sand storage tank 102 is not less than the air pressure in the sand outlet pipe 202. When the pressure gauge identifies that its pressure is less than the air pressure in the sand pipe, the balancing valve is controlled to adjust the valve core to make the valve core air outlet smaller, thereby increasing the air pressure in the bypass pipe, so that the sand storage tank 102 can discharge sand normally.

[0049] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A novel sand flushing test mechanism, used for performing a sand flushing test on an impeller (200) of a drone, characterized in that: include A sand storage tank (102) storing sand particles, wherein a first sand outlet is provided at the bottom of the sand storage tank (102); A feeding mechanism connected to the first sand outlet, the feeding mechanism comprising a cylindrical, horizontally arranged feeding cylinder (104), and a feeding shaft (106) located in the feeding cylinder (104), the feeding shaft (106) being provided with an external thread, the sand grains being transmitted between the thread line and the inside of the feeding cylinder (104), and the feeding shaft (106) being further provided with a driving mechanism for driving the feeding shaft (106) to rotate; A sand discharging channel (108) connected to the feeding tube (104) at the top, wherein the sand discharging channel (108) is a pipe-like structure and is vertically arranged; A sand outlet pipe (202), the sand outlet pipe (202) being connected to the bottom end of the sand outlet channel (108), and having a second sand outlet (204) disposed at a first free end thereof, and sand particles in the sand outlet pipe (202) being ejected through the second sand outlet (204) under the action of high-pressure gas; A casing (206), the casing (206) being a hollow shell-like structure, comprising a first side wall and a second side wall which are arranged oppositely and vertically, the rotating shaft of the impeller (200) being rotatably mounted on the second side wall, and at least partially passing through the second side wall to be connected to a driving device outside the casing (206); The gas hood (208) is a cylindrical structure provided with a hollow cavity structure. The gas hood (208) is composed of at least two parts, including a first hood body (210) located inside the casing (206) and a second hood body (216) located outside the casing (206). Both ends of the first hood body (210) are mounted on the inner walls of the first side wall and the second side wall. The second hood body (216) is located outside the casing (206), one end of which is closed and the other end is mounted on the outer wall of the first side wall. The first free end of the sand outlet pipe (202) at least partially extends into the second hood body (216). The first side wall and the second side wall are provided with a plurality of through holes on the parts located inside the gas hood (208).

2. A novel sand blasting test mechanism according to claim 1, characterized in that: The sand outlet pipe (202) has a sandblasting end (214) extending into the second cover body (216), and the sandblasting end (214) is provided with a first end and a second end in sequence from front to back, the first end is vertically arranged, and the second end is horizontally arranged, and both are tubular structures, the second end is closed at the end, and the second sand outlet (204) is a structure in which a plurality of openings for sand particles to leak out are arranged in the circumferential direction of the second end.

3. A novel sand blasting test mechanism according to claim 2, characterized in that: The sand outlet pipe (202) comprises a Laval pipe (220) and a hose (222). The hose (222) is connected to the Laval pipe (220). Two hoses (222) are provided and are symmetrically arranged up and down. The sand blasting end (214) is provided on the hose (222).

4. A novel sand blasting test mechanism according to claim 3, characterized in that: The two ends of the rotating shaft of the impeller (200) are rotatably connected to the first side wall and the second side wall respectively, and the through hole divides the first side wall and / or the second side wall into a circle of spoke-shaped structures arranged along the circumferential direction.

5. A novel sand blasting test mechanism according to claim 4, characterized in that: The sand removal cover (218) is a semi-enclosed shell structure with an opening at one end, and the open end is mounted on the second side wall. The portion of the second side wall located inside the sand removal cover (218) is provided with the through hole, and the through hole divides the second side wall into a circle of spoke-shaped structures arranged along the circumferential direction.

6. A novel sand blasting test mechanism according to claim 5, characterized in that: The rotating shaft of the impeller (200) rotatably passes through the side wall of the sand removal cover (218) and is connected to a driving device outside the sand removal cover (218).

7. A novel sand blasting test mechanism according to claim 6, characterized in that: The rotating connection parts between the rotating shaft of the impeller (200) and the first side wall, the second side wall and the side wall of the sand discharge cover (218) adopt a labyrinth seal.

8. A novel sand blasting test mechanism according to claim 5, characterized in that: A coupling (230) is arranged in the sand removal cover (218), and both ends of the coupling (230) have protruding ends which are respectively rotatably connected and protrude from the side wall of the sand removal cover (218), and the rotating shaft and the driving shaft of the driving device are respectively transmission-connected to the two protruding ends.

9. A novel sand blasting test mechanism according to claim 7 or 8, characterized in that: The driving device is a motor.

10. A novel sand blasting test mechanism according to claim 9, characterized in that: The invention also comprises an air blowing device (112), wherein the air blowing device (112) comprises an air pump and an air blowing pipe, wherein the air blowing pipe is connected to the sand outlet pipe (202), and the air blowing pipe is connected to the sand storage tank (102) via a bypass pipe (30). The coil (30) is provided with a balancing valve (32) and a pressure gauge (34) close to the sand storage tank (102), wherein the pressure gauge (34) can control the opening and closing of the balancing valve (32), thereby adjusting the pressure value of the gas flowing into the sand storage tank (102).

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