Sand washing test bed

Abstract

The invention discloses a sand washing test bench which is used for a sand washing test of an impeller and is characterized in that the sand washing test bench comprises a sand outlet pipe, a casing and an air hood, sand grains in the sand outlet pipe are ejected from a sand outlet and hit the impeller in the casing through the air hood, and the impeller is driven by a rotating shaft to rotate, so that the sand washing test in the rotating process of the impeller is realized; and the casing and the gas hood are arranged, so that a better sand washing test effect can be achieved on the basis of ensuring that the impeller is well and stably mounted.

Description

Technical Field

[0001] The invention relates to a sand blasting test bench. 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 invention is to provide a sand blasting test bench capable of simulating a sand and dust environment.

[0004] In order to solve the above problems, the present invention provides a sand blasting test bench for an impeller sand blasting test, which is characterized by comprising:

[0005] A sand outlet pipe, wherein a first free end of the sand outlet pipe is provided with a sand outlet, and sand particles in the sand outlet pipe are ejected through the sand outlet under the action of high-pressure gas;

[0006] 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;

[0007] 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 parts of the first side wall and the second side wall located inside the air hood are provided with a plurality of through holes.

[0008] 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 at the end, and the sand outlet is a plurality of opening structures for leaking sand particles arranged in the circumferential direction of the second end.

[0009] 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 Laval pipes are provided and are symmetrically arranged up and down, and the sandblasting end is arranged on the hose.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] As a further improvement of the present invention, the driving device is a motor.

[0016] The beneficial effect of the present invention is that the sand particles in the sand outlet pipe are ejected from the sand outlet port, hit the impeller in the casing through the air cover, and the impeller is driven to rotate by the rotating shaft, thereby realizing the sand flushing test during the rotation of the impeller. In addition, the casing and the air cover are provided, which can achieve better sand flushing test results while ensuring that the impeller has a good and stable installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of the sandblasting end;

[0019] In the figure: 200-impeller; 202-sand outlet pipe; 204-sand outlet; 206-casing; 208-air cover; 210-first cover body; 214-sandblasting end; 216-second cover body; 218-sand discharge cover; 220-Laval tube; 222-hose; 230-coupling. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0021] like Figure 1-2 As shown, the sand outlet pipe 202 of the present invention has a sand outlet 204 disposed at the first free end thereof, and the sand particles in the sand outlet pipe 202 are ejected through the sand outlet 204 under the action of high-pressure gas;

[0022] 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;

[0023] 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 first side wall and the second side wall are located inside the gas hood 208 and are provided with a plurality of through holes.

[0024] In this embodiment, the sand in the sand outlet pipe 202 is ejected from the sand outlet port 204, and hits the impeller 200 in the casing 206 through the air hood 208. The impeller 200 is driven to rotate by the rotating shaft, thereby realizing the sand flushing test during the rotation of the impeller 200. In addition, the casing 206 and the air hood 208 are provided, and a better sand flushing test effect can be achieved on the basis of ensuring that the impeller 200 has a good and stable installation.

[0025] 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, and the second end is closed at the end, and the sand outlet 204 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 out sand particles.

[0026] 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.

[0027] As a further improvement of the present invention, the sand outlet pipe 202 includes a Laval pipe 220 and a hose 222 . The hose 222 is connected to the Laval pipe 220 . Two Laval pipes 220 are provided and are symmetrically arranged up and down. The sandblasting end 214 is provided on the hose 222 .

[0028] The structure of the Laval tube 220 and the hose 222 is provided to ensure that the ejected sand particles are more uniform.

[0029] 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.

[0030] 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.

[0031] The spoke-shaped structure can ensure that the rotating shaft is well installed and fixed, and can also ensure that the sand inlet and the sand outlet 204 are large enough.

[0032] 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 .

[0033] 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.

[0034] 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 .

[0035] 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.

[0036] 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.

[0037] The coupling 230 is used to prevent the rotating shaft and the driving shaft from entering the sand discharge cover 218, thereby reducing the contact between the rotating shaft and the driving shaft and the sand particles, and improving the movement stability and service life of the rotating shaft and the driving shaft.

[0038] As a further improvement of the present invention, the driving device is a motor.

[0039] An electric motor is used as the driving device, and the power output is stable and adjustable.

[0040] 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 sand blasting test bench, used for sand blasting test of an impeller (200), characterized in that: include: A sand outlet pipe (202), wherein a first free end of the sand outlet pipe (202) is provided with a sand outlet (204), and sand particles in the sand outlet pipe (202) are ejected through the 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 at their parts located inside the gas hood (208).

2. A sand blasting test bench 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, and the second end is closed at the end, and the 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 sand blasting test bench according to claim 2, characterized in that: The sand-discharging pipe (202) comprises a Laval pipe (220) and a hose (222). The hose (222) is connected to the Laval pipe (220), two of which are symmetrically arranged up and down. The sandblasting end (214) is arranged on the hose (222).

4. A sand blasting test bench 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 sand blasting test bench 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 sand blasting test bench 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 sand blasting test bench 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 sand blasting test bench according to claim 5, characterized in that: A coupling is arranged in the sand removal cover (218), and both ends of the coupling have extension ends which are respectively rotatably connected and extend out of 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 extension ends.

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

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