WO2019119244A1

WO2019119244A1 - Centrifugal swing disc, spraying device and unmanned aerial vehicle

Info

Publication number: WO2019119244A1
Application number: PCT/CN2017/117048
Authority: WO
Inventors: 周乐; 吴晓龙
Original assignee: 深圳市大疆创新科技有限公司
Priority date: 2017-12-18
Filing date: 2017-12-18
Publication date: 2019-06-27
Also published as: CN109641660A

Abstract

Disclosed are a centrifugal swing disc (100), a spraying device and an unmanned aerial vehicle. The centrifugal swing disc (100) is used for rotating and spraying a liquid pesticide, and comprises an upper swing disc (1) and a lower swing disc (2), which are arranged concentrically, wherein a channel for spaying the liquid pesticide is formed between the upper swing disc (1) and the lower swing disc (2), and a flow guide groove (11) is arranged on a side, facing the lower swing disc (2), of the upper swing disc (1). When the centrifugal swing disc (100) centrifugally sprays the liquid pesticide, the flow guide groove (11) serves as a block on an outer side of the top of a place where the liquid pesticide tends to gather, and can thus prevent the liquid pesticide splashing out from a gap between the flow guide groove (11) and a lower surface of the upper swing disc (1) from having an impact on the flow guide efficiency of the flow guide groove (11), thereby improving the atomization effect.

Description

Centrifugal discs, spray devices and unmanned aerial vehicles

Technical field

The invention relates to the field of agricultural work, in particular to a centrifugal disk, a spraying device and an unmanned aerial vehicle.

Background technique

With the continuous development of technology, more and more automatic control equipment is used in agricultural operations.

At present, in order to spray a chemical such as a pesticide to a crop, the medicament can be sprayed by an automatic nozzle. Specifically, the automatic nozzle includes a rotor shaft and a tray that can be rotated by the rotor shaft. After the medicine enters the tray through the internal passage, the mist can be dispersed outward under the centrifugal force of the high speed rotation of the tray. Pull out to achieve a uniform spray effect. At present, the tray is usually a split-up structure, and a drainage structure for facilitating the liquid discharge is provided on the lower tray.

However, since the liquid medicine is rotated and pulled out of the liquid medicine, the liquid medicine is concentrated in the upper portion of the tray under the action of centrifugal force, and may be lost from the gap between the flow guiding structure and the upper tray, causing the loss of the liquid medicine.

Summary of the invention

The invention provides a centrifugal disc, a spraying device and an unmanned aerial vehicle, which can reduce the loss of the liquid medicine.

In a first aspect, the present invention provides a centrifugal disc for rotating and spraying a liquid medicine, the centrifugal disc comprising a concentrically disposed upper and lower jaws, and a spray medicine formed between the upper and lower jaws The channel of the liquid, the side of the upper tray facing the lower jaw is provided with a guide groove.

In a second aspect, the present invention provides a spray device comprising a drive shaft rotatable about its own axis and a centrifugal disc as described above, the centrifugal disc being disposed at the bottom of the drive shaft for rotation by the drive shaft and Spray the liquid.

According to a third aspect, the present invention provides an unmanned aerial vehicle comprising a center body, a machine arm connected to the center body, a power system disposed on the arm, and at least one of the foregoing devices disposed under the power system Spray device as described.

The centrifugal boring disc, the spraying device and the unmanned aerial vehicle of the invention are used for rotating and spraying the liquid medicine, and the centrifugal boring plate comprises a concentric disk and a lower boring plate which are arranged concentrically, and a formation between the upper boring plate and the lower boring plate is formed. A channel for spraying the liquid medicine, and a side of the upper tray facing the lower tray is provided with a flow guiding groove. When the centrifugal disc is centrifugally sprayed, the diversion trough will be blocked on the outer side of the top where the liquid medicine is relatively easy to accumulate, so as to prevent the chemical liquid from flying out from the gap between the diversion trough and the lower surface of the upper disc. The flow guiding efficiency of the guide trough improves the atomization effect of the centrifugal crucible.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a schematic structural view of a centrifugal disk according to a first embodiment of the present invention;

2 is a schematic cross-sectional view of a centrifugal crucible provided in Embodiment 1 of the present invention;

3 is a schematic external view of a centrifugal disk provided by Embodiment 1 of the present invention;

4 is a schematic structural view of a guide groove in a centrifugal disk according to Embodiment 1 of the present invention;

5 is a schematic structural view of another type of flow guiding groove in a centrifugal disk according to Embodiment 1 of the present invention;

6 is a schematic view showing the shape of a guide groove of an upper jaw in a centrifugal disk according to a first embodiment of the present invention;

FIG. 7 is a schematic structural view of a spraying device according to Embodiment 2 of the present invention.

Description of the reference signs:

1—upper tray; 2—lower tray; 11—diversion trough; 12—inlet port; 100—centrifugal disc; 101—drive shaft; 111—baffle; 200—spraying device; .

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

1 is a schematic structural view of a centrifugal crucible provided by Embodiment 1 of the present invention. 2 is a schematic cross-sectional view of a centrifugal crucible provided in Embodiment 1 of the present invention. FIG. 3 is a schematic view showing the outer shape of a centrifugal disk according to Embodiment 1 of the present invention. As shown in FIG. 1 to FIG. 3, the centrifugal disk provided in this embodiment is used for rotating and spraying a liquid medicine, and the centrifugal disk comprises a concentric disk 1 and a lower plate 2, a top plate 1 and a lower jaw. A passage for spraying the chemical liquid is formed between the disks 2, and a guide groove 11 is provided on a side of the upper tray 1 facing the lower tray 2.

Among them, the centrifugal disc is generally used in a spraying device or a spraying device, and the inside thereof is generally a hollow structure, so that the inside of the centrifugal disc can be filled with a liquid medicine, water or other liquid, and the liquid or other liquid can be centrifuged. Sprinkle out in the tray.

Generally, in order to facilitate the rotation of the centrifugal disk, the centrifugal disk is generally in the form of a rotating body, for example, the entire centrifugal disk has a disk-like structure.

In order to uniformly spray the liquid medicine and improve the effect of the liquid medicine, the centrifugal disk will rotate at a high speed with its own center as an axis, and the liquid medicine in the centrifugal disk will be thrown out by centrifugal force. In this way, the liquid medicine is dispersed into smaller droplets under the centrifugal force of the centrifugal disk, thereby expanding the contact area between the liquid and the outside, and at the same time ensuring a good diffusion range of the liquid, thereby achieving a better Spraying effect of liquid medicine.

In general, the rotational speed of the centrifugal disk can typically be as high as 16,000 r/min, and thus the diameter of the formed atomized droplets can generally be less than 100 μm. The smaller droplet size can effectively increase the interaction surface area of the liquid medicine with the outside, and ensure that the liquid solution produces a better effect.

In order to realize the transportation and spraying of the liquid medicine inside the centrifugal disc, the centrifugal disc can usually be a single-layer disc or a multi-layer disc structure, wherein in order to ensure the sedimentation of the liquid, the centrifugal disc is usually a multi-layered edge inclined downward. The disc structure, so that the liquid has a certain descending speed when it is thrown out, and can settle into a preset range in time without being easily dispersed. At this time, the centrifugal disk may include the upper tray 1 and the lower tray 2, and the upper tray 1 and the lower tray 2 are spaced or provided with a space therebetween, so that between the upper tray 1 and the lower tray 2 It is possible to form a passage for the liquid to enter and spray, so that after the liquid enters the centrifugal tray, it can enter the area between the upper tray 1 and the lower tray 2 and is pulled out from the area by centrifugal force.

Since the liquid entering the inside of the centrifugal disk needs to be pulled out by centrifugal force, in order to centrifugally guide the liquid when spraying the liquid, the liquid can be centrifugally sprayed and sprayed under the rotation of the centrifugal disk, and centrifuged. A guide groove 11 is provided inside the disk, and the flow guiding groove 11 is connected to the upper tray 1. The guide groove 11 can guide the liquid medicine to a specific centrifugal trajectory by the pressure of the groove wall when the centrifugal disk rotates, thereby naturally and smoothly spraying the periphery of the centrifugal disk.

As the liquid is sprayed by the pan, the liquid will fly out under the centrifugal force. At this time, the liquid medicine in the centrifugal disk has a tendency to continuously move outward due to the centrifugal force. Further, since the centrifugal disk is usually a structure in which the edge is inclined downward, the chemical liquid is more likely to accumulate at the top position of the flow guiding groove 11, that is, the side close to the upper tray 1. Therefore, by connecting the guide groove 11 and the upper tray 1, the flow guiding groove 11 can be blocked from the outer side of the liquid medicine, and the gap between the liquid guiding groove 11 and the lower surface of the upper tray 1 can be avoided. The flying out affects the flow guiding efficiency of the guiding groove 11, thereby improving the atomization effect of the centrifugal disk.

As an alternative embodiment, in order to allow the chemical solution to pass into the interior of the centrifugal disk, the top center portion of the upper tray 1 is provided with a liquid inlet port 12 communicating with the passage. Thus, the liquid medicine can be introduced from the liquid inlet 12 at the top of the upper tray 1 and flow downward into the passage between the upper tray 1 and the lower tray 2, and then pulled out by the rotation of the centrifugal disk. spray. The liquid inlet port 12 is located at the center of the upper jaw plate 1, so that the chemical liquid enters the central region of the centrifugal disk and moves to the edge region of the centrifugal disk to move out.

In order to provide centrifugal flow guiding action to the drug solution, the flow guiding groove 11 can have various specific embodiments. The structure of the flow guiding groove 11 will be further specifically described below.

As an alternative structure, the flow guiding groove 11 may extend from a side close to the center of the upper jaw 1 to a side close to the edge of the upper tray 1. Thus, the flow guiding groove 11 forms a flow guiding passage extending from the central region of the upper cymbal disk 1 to the edge region of the upper cymbal disk 1, and after the chemical liquid enters the space between the upper and lower cymbals, it can be in the guiding groove 11 Under the restriction of the groove wall, the outer side of the centrifugal disk is gradually moved in the direction of the flow guiding groove 11 until it is misted outward from the edge region of the upper tray 1.

Wherein, the guide groove 11 can have a plurality of different extension lengths in the upper tray 1 . For example, one end of the guide groove 11 may be located at the center of the upper jaw 1 and the other end may extend to the edge of the upper tray 1; or the guide groove 11 may be located at a distance from the center of the upper tray 1 And extending to a position at a certain distance from the edge of the upper tray 1, and the like. Thus, the guide grooves 11 are arranged in different lengths in the upper jaw 1 to form different droplet atomization effects or different spray ranges, thereby adapting to different spraying and use occasions.

In order to improve the dispersion and guiding effect of the guiding tank 11 on the chemical liquid, the liquid medicine can be dispersed and uniformly sprayed from the circumferential direction of the centrifugal disk. Alternatively, the guiding groove 11 can be A plurality of the plurality of flow guiding grooves 11 are arranged radially above the center of the disk 1 .

Thus, the flow guiding groove 11 radially arranged around the center of the upper cymbal disk 1 can surround the liquid inlet of the upper cymbal disk 1. When the liquid medicine enters the upper tray 1 from the liquid inlet port 12, under the centrifugal action of the centrifugal disk, it will move to the periphery of the center position of the centrifugal disk and separate into a plurality of guides located outside the centrifugal disk. In the flow cell 11. At this time, the plurality of flow guiding grooves 11 arranged radially on the periphery of the liquid inlet port can be rotated at a high speed of the centrifugal disk to move the liquid medicine along the extending direction of the flow guiding groove 11 and from the circumferential direction of the centrifugal disk. The edges are sprinkled in a mist.

The flow guiding groove 11 can have a plurality of different composition structures. 4 is a schematic structural view of a flow guiding groove in a centrifugal disk according to Embodiment 1 of the present invention. As shown in FIG. 4, as a common structural form, each of the guide channels 11 may include at least two baffles 111 spaced apart from each other, and the baffle 111 is disposed on the bottom surface of the upper tray 1 and The upper jaws 1 together form the wall of the guide groove 11. At this time, since there is a space between the different baffles, a space for flowing and scooping the liquid medicine can be formed between the at least two baffles. The side and the bottom surface of the space are surrounded by the deflector 111 and the bottom surface of the upper jaw 1 respectively. Thus, the baffles 111 and the bottom surface of the upper cymbal disk 1 can collectively serve as the groove walls to form the flow guiding grooves 11.

When the flow guiding groove 11 is composed of at least two baffles 111 which are spaced apart from each other, the plurality of baffles 111 constituting the flow guiding groove 11 can generally maintain an equal interval between the two to keep the guiding groove 11 Consistent width. In addition, the distance between the baffles 111 constituting the flow guiding groove 11 may be changed back and forth, for example, the flow guiding groove 11 may be large in front of the liquid flow direction or small in front or small and large in front, thereby changing the chemical liquid. The speed of the exit.

FIG. 5 is a schematic structural view of another type of flow guiding groove in a centrifugal disk according to Embodiment 1 of the present invention. As shown in FIG. 5, in another type of guide groove structure, the flow guiding groove 11 may also be a groove formed on the bottom surface of the upper jaw 1. At this time, the opening of the groove is flush with the bottom surface of the upper tray 1, and the groove is entirely located inside the bottom surface of the upper tray 1. Thus, the bottom surface of the upper tray 1 and the lower tray 2 can be assembled to each other such that the lower tray 2 covers the opening of the groove and closes the groove to constitute the flow guiding groove 11.

In addition, the guide groove 11 of the upper tray 1 can also adopt other groove structures and forms commonly used by those skilled in the art, and details are not described herein again.

Since the liquid medicine is scooped out by the centrifugal force in the internal passage of the centrifugal disc, the diversion tank 11 can generally have a shape that closely matches the scooping path of the chemical liquid. Figure 6 is the invention The schematic diagram of the shape of the guide groove of the upper jaw in the centrifugal tray provided in the first embodiment. As shown in FIG. 6, for example, the flow guiding groove 11 may be an arcuate groove. The streamlined curved groove can play a good centrifugal guiding effect for the chemical liquid, and at the same time, the guiding groove 11 can reduce the liquid wall of the liquid medicine and the guiding groove 11 through the arc of the groove wall when guiding the liquid medicine. The frontal collision between the liquid allows the liquid to pass smoothly through the inside of the flow guiding groove 11, thereby minimizing the speed decay of the liquid medicine, and ensuring that the liquid medicine has a sufficient ejection speed when the spray is poured out. In addition, the curved guide groove 11 can also make the liquid medicine have a better direction of the ejection and the angle of the ejection, ensuring that the chemical solution has a normal spraying range.

When the guide groove 11 is an arc groove, in order to further improve the discharge direction and the discharge speed of the chemical liquid, the arc of the flow guide groove 11 may be an Archimedes arc. Among them, the Archimedes arc can also be called the Archimedes spiral or the constant velocity spiral, which specifically indicates that a point is rotated at a fixed angular velocity while rotating at a fixed angular velocity while moving away from a fixed point at a constant angular velocity. Track. In the centrifugal disk of the embodiment, since the centrifugal disk rotates at the same rate while rotating, and the flow rate of the liquid into the centrifugal disk is approximately constant, when the centrifugal disk is sprayed by the centrifugal force, the liquid is sprayed by the centrifugal force. The liquid droplets of the liquid medicine also approach the center of the centrifugal disk at a constant rate, and at the same time, under the driving of the centrifugal disk, the rotation of the center of the centrifugal disk is performed at a fixed angular velocity, that is, the movement trajectory of the liquid medicine is similarly followed. Archimedes arc. Thus, when the arc of the flow guiding groove 11 is an Archimedes arc, the arc shape of the guiding groove 11 can be better matched with the trajectory of the liquid droplet when the liquid medicine is centrifuged, thereby The liquid is naturally and smoothly exported from the centrifugal pan and sprinkled around the centrifugal pan to make the liquid spray better.

When the centrifugal disk is sprayed with a mist-like liquid to the surroundings, the entire centrifugal disk has a downwardly inclined shape in order to allow the liquid to settle smoothly. At this time, the center portion of the centrifugal disk is higher than the edge portion of the centrifugal disk. Since the liquid in the centrifugal disk is usually sprayed from the center of the centrifugal disk to the peripheral edge of the centrifugal disk, when the central portion of the centrifugal disk is higher than the edge of the centrifugal disk, the channel in the centrifugal disk is centrifuged. It will also gradually descend from the center of the centrifugal disk to the edge of the centrifugal disk, and the liquid in the channel will also move downward under the restriction of the channel. Therefore, when the liquid is sprayed by centrifugation, it will gradually move downward under the shape limitation of the centrifugal disk, and will also have a downward velocity component when it is pulled out from the edge portion of the centrifugal disk. Therefore, even if the liquid medicine is dispersed into a mist-like droplet, it will move downward under the action of inertia and realize the sedimentation of the chemical solution, so that the chemical liquid is spilled to the area to be sprayed without the liquid medicine being large in the air. The situation of scattered areas.

When the central portion of the entire centrifugal disk is higher than the edge of the centrifugal disk, correspondingly, The pan 1 and the lower pan 2 can also have a shape in which the central portion is higher than the edge portion, so that the lower surface of the upper disc 1 and the upper surface of the lower disc 2 can form a passage which gradually descends from the inner side to the outer side. Let the liquid flowing through the channel have a downward ejection speed.

Among them, the upper tray 1 and the lower tray 2 can also have a variety of different specific shapes and structures. For example, the upper and lower surfaces of the upper and

lower jaws

1 and 2 can be the same or similar downwardly inclined shape as the entire centrifugal disk. At this time, the upper tray 1 is taken as an example, and the lower surface and the upper surface of the upper tray 1 are used. It may be a shape in which the central portion is higher and the edge portion is lower, and the upper and lower surfaces of the upper jaw 1 are generally nearly parallel or have a similar downtilt angle. Similarly, the lower jaw 2 can also have a shape similar to that of the upper tray 1, and will not be described again here.

As another embodiment, since only the lower surface of the upper tray 1 and the upper surface of the lower tray 2 are formed for the passage for drawing the liquid medicine, the other portions of the upper tray 1 and the lower tray 2 are Can be other shapes. For example, the lower surface of the lower jaw 2 may be a horizontally or approximately horizontal plane, such that the shape of the bottom surface of the centrifugal disk is relatively regular and the shape is relatively beautiful.

Further, in order to ensure that the mist droplets sprayed by the centrifugal disk have better sedimentation effect and suitable coverage, optionally, the connection between the central portion of the centrifugal disk and the edge portion of the centrifugal disk There may be an angle a with the horizontal plane, and the angle a is usually in the range of 10 to 40 degrees.

Wherein, since the height of the central portion of the centrifugal disk is higher than the height of the edge portion, the connection between the central portion of the centrifugal disk and the edge portion of the centrifugal disk is obliquely downward. At this time, the larger the angle a between the line and the horizontal plane, the more the velocity component of the droplet downwards when the centrifugal disk is pulled out. In general, in order to allow the droplets to settle smoothly, and to ensure that the droplets sprayed by the centrifugal disk have a sufficiently large coverage, the range of the angle a is maintained between 10° and 40°, and the angle is larger. The higher the downward velocity of the droplet, the easier it is for the droplet to settle.

Generally, in order to have a larger spray range for the centrifugal disk, the angle a between the line connecting the central portion of the centrifugal disk to the edge portion of the centrifugal disk and the horizontal plane is usually about 10°. At this time, the droplets of the liquid medicine which are thrown out during the rotation of the centrifugal disk can form a large coverage, and the droplets have a good sedimentation effect.

In addition, in order to achieve a reliable connection between the guide groove 11 and the upper cymbal disk 1, a gap between the flow guiding groove 11 and the upper cymbal disk 1 for leaking the chemical liquid is avoided, and the flow guiding groove 11 and the upper cymbal disk 1 are The space can be an integral structure. Upper jaw 1 formed by integrally formed structure, root of guide groove 11 There is no gap or gap between the portion and the lower surface of the upper tray 1, so that the chemical liquid does not leak from the root portion of the flow guiding groove 11 to the outside of the flow guiding groove 11, and the centrifugal disk has a high spraying efficiency for the chemical liquid.

Specifically, when the flow guiding groove 11 and the upper jaw 1 are integrally formed, the specific manner of integral molding may be differently changed according to different materials used in the centrifugal disk. For example, when the upper tray 1 in the centrifugal disk is made of a metal material such as aluminum alloy, the flow guiding groove 11 can be formed on the lower side of the upper tray 1 by metal cutting or forging, molding, or the like. When the upper tray 1 is a plastic member or a resin member, the entire upper tray 1 and the guide groove 11 can be formed by injection molding and constitute a unified whole.

In addition, the 3D printing rapid prototyping technology, or other integrally formed structures for forming the flow guiding groove and the upper boring plate, which are well known to those skilled in the art, may be used, and will not be described in detail in this embodiment.

In this embodiment, the centrifugal disk is used for rotating and spraying the liquid medicine, and the centrifugal disk comprises a concentric disk and a lower plate, and a channel for spraying the liquid medicine is formed between the upper plate and the lower plate. A guide groove is provided on one side of the tray facing the lower tray. When the centrifugal disc is centrifugally sprayed, the diversion trough will be blocked on the outer side of the top where the liquid medicine is relatively easy to accumulate, so as to prevent the chemical liquid from flying out from the gap between the diversion trough and the lower surface of the upper disc. The flow guiding efficiency of the guide trough improves the atomization effect of the centrifugal crucible.

FIG. 7 is a schematic structural view of a spraying device according to Embodiment 2 of the present invention. As shown in FIG. 7, the spraying device 200 in this embodiment specifically includes a driving shaft 101 rotatable about its own axis and a centrifugal disk 100 in the first embodiment. The centrifugal disk 100 is disposed at the bottom of the driving shaft 101. It is used to rotate and spray the liquid medicine under the driving of the drive shaft 101. The specific structure, function, and working principle of the centrifugal disk 100 have been described in detail in the foregoing first embodiment, and are not described herein again.

Specifically, the driving shaft 101 of the spraying device 200 can be rotated about its own axis by a motor or other driving device, and the centrifugal disk 100 and the driving shaft 101 are concentrically arranged and can be rotated by the driving shaft 101, thereby The liquid medicine or other liquid in the centrifugal disk 100 can be pulled out from the side of the centrifugal disk 100 by the centrifugal force during rotation, thereby achieving the purpose of uniformly spraying the liquid.

Wherein, in order to facilitate the maintenance and repair of the spray device 200, the drive shaft 101 in the spray device 200 is generally detachably connected with the centrifugal disk 100, for example, by screwing The firmware is connected, or it is stuck by a snap structure. When the snap-fit structure is used for snapping, the drive shaft 101 and the centrifugal disk 100 may also be a quick-release connection.

In order to supply the liquid medicine to the centrifugal disk 100, the spraying device 200 can adopt a plurality of different liquid feeding methods. Specifically, in a liquid feeding mode, the spraying device 200 can adopt an inlet passage that is disposed on the driving shaft 101 and communicates with the inside of the centrifugal disk 100, and passes through the liquid inlet passage inside the driving shaft 101 to the inside of the centrifugal disk 100. Achieve liquid supply.

In addition, in another liquid feeding mode, the spraying device 200 can also realize the liquid supply to the centrifugal disk 100 by using an independent liquid inlet pipe disposed on the side of the driving shaft 101, so that the centrifugal disk 100 can be continuously sprayed to the periphery. Liquid medicine.

In this embodiment, the spraying device specifically includes a driving shaft and a centrifugal boring disk rotatable about an axis thereof, and the centrifugal boring disk is disposed at a bottom of the driving shaft for rotating and spraying the liquid medicine under the driving of the driving shaft; wherein, the centrifugal The tray is used for rotating and spraying the liquid medicine. The centrifugal tray comprises concentrically arranged upper and lower jaws, and a channel for spraying the liquid medicine is formed between the upper and lower jaws, and the upper tray is facing downward. A guide groove is provided on one side of the disc. When the spraying device centrifugally sprays the liquid, the guiding trough will be blocked outside the top of the centrifugal disk which is easy to accumulate, so as to avoid the liquid from the gap between the centrifugal groove and the lower surface of the upper plate. Flying out affects the flow guiding efficiency of the diversion trough, thereby improving the atomization effect of the centrifugal crucible.

Based on the foregoing embodiments, the present invention also provides an unmanned aerial vehicle. The unmanned aerial vehicle provided in this embodiment specifically includes a center body, an arm connected to the center body, a power system disposed on the arm, and at least one spraying device disposed under the power system. The specific structure, function and working principle of the spraying device have been described in detail in the foregoing second embodiment, and are not described herein again.

Specifically, the center body of the UAV can be used as the main structural body of the UAV, and is used to carry controllers and various types of work loads, such as cameras and liquid tanks. The arm is usually located on the outer side of the center body, and one end of the arm is connected to the center body, and the other end of the arm is provided with a power system for the UAV to fly. In this way, the UAV can perform operations such as take-off, hover and air flight under the driving of the power system.

Among them, the power unit may generally include a structure such as a motor and a propeller. Specifically, the motor is fixed at the end of the arm, and the output shaft of the motor is coupled with the hub of the propeller to drive the propeller blade to rotate and generate lift. At this time, the unmanned aircraft can be realized under the lift of the propeller. Take off and land and fly.

Generally, the propeller is usually located above the motor, and at least one of the spraying devices of the foregoing second embodiment may be disposed under the motor, and the spraying device can spray the liquid medicine or other liquid to the lower area of the unmanned aerial vehicle to enable the unmanned aerial vehicle to perform painting. , watering or plant protection operations. The UAV can supply liquid to the spraying device through a load such as a liquid supply tank, so that the spraying device can continue the spraying operation.

In general, in order to achieve a larger spray range, the spray devices are generally plural, and are usually disposed under the power unit in a one-to-one correspondence.

Specifically, the spraying device comprises a driving shaft rotatable about its own axis and the centrifugal boring disc of the first embodiment. The centrifugal boring disc is disposed at the bottom of the driving shaft for rotating and spraying the liquid medicine under the driving of the driving shaft. In this way, the spraying device can use the centrifugal force to uniformly spray the mist of the liquid medicine into a large area under the unmanned aerial vehicle.

In this embodiment, the unmanned aerial vehicle specifically includes a central body, a connecting arm connected to the central body, a power system disposed on the arm, and at least one spraying device disposed under the power system; the spraying device specifically includes an axis that can be wound around the axis a rotating drive shaft and a centrifugal disc, the centrifugal disc is disposed at the bottom of the drive shaft for rotating and spraying the liquid medicine under the driving of the driving shaft; wherein the centrifugal disc is used for rotating and spraying the liquid medicine, and the centrifugal disc includes Concentrically disposed upper and lower jaws, a passage for spraying the liquid medicine is formed between the upper and lower jaws, and a guide groove is provided on a side of the upper tray facing the lower tray. In this way, when the UAV is centrifugally sprayed, the diversion trough will be blocked on the outer side of the top of the centrifugal disc which is easy to accumulate, so as to avoid the liquid medicine from between the centrifugal chute and the lower surface of the upper disc. Flying out in the gap affects the flow guiding efficiency of the guiding trough, thereby improving the atomization effect when spraying the liquid medicine.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A centrifugal disk for rotating and spraying a liquid medicine, the centrifugal disk comprising an upper tray and a lower jaw, and a gap between the upper tray and the lower tray for spraying the liquid medicine is formed The passage is characterized in that a side of the upper jaw facing the lower jaw is provided with a flow guiding groove.
A centrifugal disk according to claim 1, wherein a top center portion of said upper jaw is provided with a liquid inlet communicating with said passage.
The centrifugal disk according to claim 2, wherein said flow guiding groove extends from a side close to a center of said upper jaw to a side close to an edge of said upper tray.
The centrifugal disk according to claim 3, wherein the plurality of flow guiding grooves are plural, and the plurality of flow guiding grooves are radially arranged around a center of the upper cymbal disk.
The centrifugal disk according to claim 4, wherein each of the flow guiding grooves comprises at least two mutually spaced baffles, and the baffles are disposed on a bottom surface of the upper plate. And together with the upper tray, the wall of the guide groove is formed.
The centrifugal disk according to any one of claims 1 to 5, wherein a central portion of the centrifugal disk is higher than an edge portion of the centrifugal disk.
The centrifugal disk according to claim 6, wherein a line connecting the central portion of the centrifugal disk to an edge portion of the centrifugal disk has an angle with a horizontal plane, and the angle is The range is from 10° to 40°.
The centrifugal disk according to claim 7, wherein at least one of an upper surface of said upper jaw and a lower surface of said lower tray has said angle with a horizontal plane.
A centrifugal disk according to any one of claims 1 to 5, wherein the flow guiding groove is an arcuate groove.
The centrifugal disk according to claim 9, wherein the arc of the flow guiding groove is an Archimedes arc.
The centrifugal disk according to any one of claims 1 to 5, wherein the flow guiding groove and the upper cymbal disk are integrally formed.
A spraying device, comprising: a driving shaft rotatable about an axis thereof and a centrifugal crucible, the centrifugal crucible being disposed at a bottom of the driving shaft for rotating and spraying under the driving of the driving shaft Liquid medicine

The centrifugal tray includes an upper tray and a lower tray, and the upper tray and the lower tray are shaped A passage for spraying the chemical liquid, and a side of the upper tray facing the lower jaw is provided with a flow guiding groove.
The spraying device according to claim 12, characterized in that the top central portion of the upper jaw is provided with a liquid inlet communicating with the passage.
A spraying device according to claim 13, wherein said flow guiding groove extends from a side close to a center of said upper jaw to a side close to an edge of said upper tray.
The spraying device according to claim 14, wherein the plurality of flow guiding grooves are plural, and the plurality of flow guiding grooves are radially arranged around a center of the upper jaw.
The spraying device according to claim 15, wherein each of said flow guiding grooves comprises at least two mutually spaced baffles, said baffles being disposed on a bottom surface of said upper cymbal disk, and Together with the upper jaw, the wall of the flow guiding groove is formed.
A spraying device according to any one of claims 12 to 16, wherein a central portion of the centrifugal disk is higher than an edge portion of the centrifugal disk.
The spraying device according to claim 17, wherein a line connecting the central portion of the centrifugal disk to an edge portion of the centrifugal disk has an angle with a horizontal plane, and the range of the angle It is 10° to 40°.
The spraying device according to claim 18, wherein at least one of an upper surface of the upper jaw and a lower surface of the lower tray has the included angle with a horizontal plane.
A spraying device according to any one of claims 12-16, wherein the flow guiding groove is an arcuate groove.
The spraying device according to claim 20, wherein the arc of the flow guiding groove is an Archimedes arc.
A spraying device according to any one of claims 12 to 16, wherein the flow guiding groove and the upper weir are in an integrally formed structure.
An unmanned aerial vehicle, comprising: a center body, a machine arm connected to the center body, a power system disposed on the arm and at least one spraying device disposed under the power system;

The spraying device includes a driving shaft and a centrifugal boring disk rotatable about an axis thereof, and the centrifugal boring disk is disposed at a bottom of the driving shaft for rotating and spraying the liquid medicine under the driving of the driving shaft;

The centrifugal tray includes an upper tray and a lower tray, and a passage for spraying the chemical liquid is formed between the upper tray and the lower tray, the upper tray facing the lower tray One side is provided with a guide groove.
The UAV according to claim 23, wherein a top center portion of said upper jaw is provided with a liquid inlet communicating with said passage.
The UAV according to claim 24, wherein said flow guiding groove extends from a side close to a center of said upper jaw to a side close to an edge of said upper tray.
The UAV according to claim 25, wherein the plurality of flow guiding grooves are plural, and the plurality of flow guiding grooves are radially arranged around a center of the upper winding disk.
The UAV according to claim 26, wherein each of said flow guiding grooves comprises at least two mutually spaced baffles, said baffles being disposed on a bottom surface of said upper cymbal disk. And together with the upper tray, the wall of the guide groove is formed.
The UAV according to any one of claims 23 to 27, characterized in that the central portion of the centrifugal disk is higher than the edge portion of the centrifugal disk.
The UAV according to claim 28, wherein a line between the central portion of the centrifugal disk and an edge portion of the centrifugal disk has an angle with a horizontal plane, and the angle is The range is from 10° to 40°.
The UAV according to claim 29, wherein at least one of an upper surface of said upper jaw and a lower surface of said lower jaw has said angle with a horizontal plane.
The UAV according to any one of claims 23 to 27, wherein the flow guiding groove is an arcuate groove.
The UAV according to claim 31, wherein the arc of the guide groove is an Archimedes arc.
The UAV according to any one of claims 23 to 27, wherein the flow guiding groove and the upper winding disk are integrally formed.