WO2024109950A1

WO2024109950A1 - Non-contact suction cup

Info

Publication number: WO2024109950A1
Application number: PCT/CN2023/134192
Authority: WO
Inventors: 贺建立
Original assignee: 贺建立
Priority date: 2022-08-26
Filing date: 2023-11-26
Publication date: 2024-05-30
Also published as: CN115648270A

Abstract

The present invention relates to the technical field of objects for mechanically suctioning up and placing articles and suctioning non-smooth, rough objects, and disclosed is a non-contact suction cup. The non-contact suction cup comprises a rotating source, an empty box body provided with an opening at the bottom, an auxiliary supporting device, an object formed by several thin sheets surrounding a center, and a thin sheet protection device. According to the non-contact suction cup of the present invention, the rotating source is used to rotate and drive the several thin sheets to rotate around the formed object at a high speed to generate negative pressure by centrifugation, and said cup does not come into contact with a suctioned object. The speed of rotation can be adjusted to flexibly adjust the suction force of the suction cup. The size of the empty box body can also be changed to obtain a large suction area. The non-contact suction cup has a simple structure, is lightweight, and has faster suctioning and placement response speed.

Description

A non-contact suction cup

Technical Field

The present invention relates to a suction cup, and in particular to a non-contact suction cup.

Background technique

The non-contact suction cup is suitable for adsorbing rough and uneven surfaces, hollow and breathable workpieces, thin thickness, high surface requirements, precision and fragile workpieces. It can adsorb without direct contact with the adsorbed object. It is usually used in conjunction with a robot arm. For example, it can be used to absorb small electronic components, relatively thin cards, masks, cloth pieces, sponge sheets, solar cells in the new energy industry, etc.

At present, most of the existing non-contact suction cups use compressed air and are connected to the suction cup through an air pipe. When used, they need to be equipped with an air compressor, air pipe, connecting valve, vacuum generator, etc. Most of them adopt a multi-component assembly structure and cannot be used as a single component. The functional application is not popular, not only does it consume a lot of air, but it also makes a lot of noise.

Summary of the invention

The purpose of the present invention is to provide a non-contact suction cup driven by a rotating source. The suction cup can work when the rotating source rotates, and does not need to be equipped with an air compressor or air pipe line separately. The airflow in the suction cup is evenly distributed, and the adsorption force is evenly distributed. The adsorption force can be achieved by adjusting the rotation speed or changing the size of the empty box according to the size of the workpiece. It has the advantages of energy saving, environmental protection, low noise and simple structure.

To achieve this purpose, the present invention adopts the following technical solutions:

The present invention includes a rotation source, a fixed bracket, the fixed bracket is connected to the rotation source; an empty box with an open end face, the interior of the empty box is a number of small spaces separated by a circle formed by a number of thin sheets with a width smaller than its height and length surrounding the center of the open end face of the empty box, or a number of thin sheets with a width smaller than its length and height surrounding the center of the open end face of the empty box to form a number of spaces inside the empty box, the empty box with an open end face is connected to the rotating part of the rotation source, the center surrounded by the thin sheets is concentric with the rotating part of the rotation source, and the empty box rotates freely around the rotation axis of the rotation source.

Further, it includes a rotation source and an empty box body with an open end face, the rotation source is connected to the outer wall of the end face opposite to the open end face of the empty box body with an open end face, the rotating part of the rotation source passes through the end face inside the empty box body or the rotation source is connected to the inner wall of the end face opposite to the open end face of the empty box body inside the empty box body; an object is formed by a surface composed of a plurality of thin sheets in the width direction and the height direction on one side of a circle around the center of a column with space between two adjacent thin sheets, the object is concentrically connected to the rotating part of the rotation source, and the object is inside the empty box body and rotates freely around the rotation axis of the rotation source.

Furthermore, the inner wall or outer shape of the hollow box is a regular shape or an irregular shape, and the regular shape includes at least one of the following: sphere, cylinder, polygon, and the irregular shape includes at least one of the following: cone, trapezoid, irregular polygon, arc, and the above shapes can be combined or superimposed.

Furthermore, the interior of the empty box is a closed space or the negative pressure generated by the open end surface of the empty box is proportional to the degree of sealing of the interior of the empty box.

Furthermore, the plane formed by the height and length directions of the thin film is perpendicular to the horizontal plane of the opening end face of the empty box, or the plane formed by the length and height directions of the thin film is respectively distributed at an acute angle to the horizontal plane of the opening end face of the empty box on one side and the outer side close to the center of the circle. The length direction of the thin film is regularly or irregularly distributed, and the plane formed by the length and height directions is perpendicular to the horizontal plane of the opening end face or at an acute angle, and negative pressure can be generated by rotating clockwise or counterclockwise.

Furthermore, it also includes a flow guiding device, which is connected to the open end surface of the empty box or the part of the non-contact suction cup that does not participate in the rotation, to guide the airflow to flow out horizontally or away, and isolate the adsorbed object.

Furthermore, the rotation source is a motor.

Furthermore, the surface adjacent to the open end face of the empty box body extends outward relative to the open end face to form a flow-guiding device. The open end face is the main inlet and outlet of the gas, and the gas inlet and outflow share the same open end face.

Furthermore, it also includes a thin film protection device, which is connected to the open end surface of the empty box body or the part of the non-contact suction cup that does not participate in the rotation.

Furthermore, it also includes an auxiliary supporting device, which is connected to the part of the non-contact suction cup that does not participate in the rotation, and assists the opening end surface of the empty box body to not contact the adsorbed object.

The beneficial effects of the present invention are:

The present invention utilizes rotation to accelerate the gas flow rate between two adjacent thin sheets inside the empty box to generate centrifugal force, so as to produce a low-pressure area inside the empty box, and generate high-speed flow of gas at the open end face of the empty box to form a local negative pressure and generate suction. The motor power or the size of the empty box can be adjusted. The present invention has a simple structure, is easy to control, and is easy to manufacture and install, which provides convenience for large-scale manufacturing and engineering applications.

Description of the attached drawings:

FIG1 is a schematic diagram of an explosion of a non-contact suction cup according to the present invention.

Figure 2 is a schematic diagram of the explosion of a non-contact suction cup of the present invention.

Figure 3 Schematic diagram of the regular or irregular shape of the inner wall of an empty box and the unenclosed space.

Figure 4 Schematic diagram of various diversion devices.

Figure 5 Schematic diagram of various distributions of thin slices.

Figure 6 Schematic diagram of a thin film protection device made of multi-layer heat pipes.

Figure 7 is a schematic diagram of a thin film protection device made of an empty box with a built-in motor and a heat pipe.

Figure 8 is a schematic diagram of a motor rotating in an empty box on one side of the open end face of the empty box.

Figure 9 is a schematic diagram of a motor indirectly connected to an empty box at one side of the opening end face of the empty box.

In the figure: 1 rotating source, 2 fixed bracket, 3 cylindrical empty box with several spaces inside, 4 auxiliary support device, 5 guide device, 6-thin sheet protection device, 7 an empty box with an end opening, 8 an object formed by several thin sheets surrounding a column, 9 an empty box with a regular inner wall or outer shape, 10 an empty box with an irregular inner wall or outer shape, 11 an empty box close to a closed space, 12 an isolation guide device with an upper opening end face greater than or equal to the diameter of the arc tangent to the bottom surface, 13 a plane guide device, 14 an angle deflection guide device, 15 a conical guide device, 16 a cross-sectional view of a double-conical isolation guide device, 17 a cross-sectional view of an isolation guide device with an upper opening end face smaller than the diameter of the arc tangent to the bottom surface and greater than or equal to the inner wall of the empty box, 18 a cross-sectional view of a semicircular isolation guide device with an upper opening end face smaller than the diameter of the inner wall of the empty box, 19 a regular distribution diagram of the length, width and height of the thin sheets. 20 Regular distribution diagram of thin slice height, 21 Irregular distribution diagram of thin slice length, width and height, 22 Regular distribution diagram of length, width and height of small cavity made of thin slice alone, 23 Regular distribution diagram of height of small cavity made of thin slice alone, 24 Irregular distribution diagram of length, width and height of small cavity made of thin slice alone, 25 Diagram of interconnected fan-shaped small cavities in empty box, 26 Diagram of irregular fan-shaped small cavities in empty box, 27 Diagram of fan-shaped small cavities with regular width distribution in empty box, 28 Thin slice protection device made of double-layer heat pipe, 29 Diagram of thin slice protection device made of multi-layer heat pipe.

具体实施方式Detailed ways

In order to further explain the technical solution of the present invention and to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only embodiments of a part of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

The following embodiments can be applied to the above-mentioned industries as well as to industries that are expected to emerge in the future.

Example 1

As shown in Figure 1, the non-contact suction cup of the embodiment includes a rotation source 1, a fixed bracket 2, an empty box with an open end face, a plurality of spaces 3 formed by a plurality of thin sheets around the center of the open end face inside the empty box, an auxiliary support device 4, a guide device 5, and a thin sheet protection device 6; the rotation source 1 of the non-contact suction cup is connected to the fixed bracket 2, the rotating part of the rotation source 1 is connected to the empty box 3, the auxiliary support device 4 is connected to the fixed bracket 2, the rotating part of the rotation source 1 is concentrically connected to the empty box 3, the guide device 5 is connected to the open end face of the empty box 3, and the thin sheet protection net 6 is connected to the auxiliary support device 4.

The rotation source 1 rotates, driving the empty box body 3 to rotate. Under the action of centrifugal force, the gas between two adjacent thin sheets inside the empty box body 3 generates kinetic energy and moves in a circle with the empty box body 3. Negative pressure is generated between the thin sheets, and the air pressure difference causes external gas to enter between the thin sheets. The gas continuously generates kinetic energy and reaches the inner wall of the empty box body 3. The interior of the empty box body 3 is a closed space. The gas that has gained kinetic energy will diffuse and flow out from the open end face of the inner wall of the empty box body 3 through the guide device 5 at high speed, generating negative pressure. The empty box body 3 rotates at high speed, and the gas flow rate between the thin sheets is accelerated to form negative pressure, generating suction. The bottom surface of the auxiliary support device 4 is at a distance from the open end face of the empty box body 3, so it can adsorb objects without contacting the open end face of the empty box body.

Example 2

As shown in Figure 4, the non-contact suction cup of the embodiment includes a rotation source 1, an empty box body 7 with an open end face, an auxiliary support device 4, an object 8 formed by a surface composed of a plurality of thin sheets in the width direction and the height direction around the center of the columnar body with space between two adjacent thin sheets, a flow guide device 5, and a thin sheet protection device 6. The rotation source 1 of the non-contact suction cup is connected to the end face opposite to the open end face of the empty box body 7, the rotating part of the rotation source 1 is in the empty box body 7, the rotating part of the rotation source 1 is concentrically connected to the object 8 formed by the plurality of thin sheets, the object 8 formed by the plurality of thin sheets rotates freely inside the empty box body 7, the auxiliary support device 4 is connected to the empty box body 7, the flow guide device 5 is installed on the open end face of the empty box body 7, and the thin sheet protection net 6 is connected to the auxiliary support device 4.

The rotation source 1 rotates, driving the object 8 formed by the space between two adjacent thin sheets in the empty box body 7 around the center of the column formed by the surface composed of the width and height directions of one side of the several thin sheets. Under the action of centrifugal force, the gas between the two adjacent thin sheets of the object 8 generates kinetic energy and reaches the inner wall of the empty box body 7. The inner wall of the empty box body 7 makes a circular motion with the object 8. The two adjacent thin sheets of the object 8 generate negative pressure. The air pressure difference causes external gas to enter between the thin sheets, and the gas continuously generates kinetic energy and reaches the inner wall of the empty box body 7. The interior of the empty box body 7 is a closed space. The gas that obtains kinetic energy will diffuse and flow out from the guide device 5 on the open end face of the inner wall of the empty box body 7 at a high speed, generating negative pressure. The object 8 rotates at a high speed, and the gas flow rate between the thin sheets is accelerated to form negative pressure, generating suction. The bottom surface of the auxiliary support device 4 is at a distance from the open end face of the empty box body, so it can adsorb objects without contacting the open end face of the empty box body.

From the contents of the above embodiments, it can be seen that a rotation source that can provide continuous rotational motion, such as a motor, a combination of a motor and a speed transmission, an engine, a combination of an engine and a speed transmission, a hydraulic motor, etc., can provide a continuous rotation device, and an object surrounded by a rotating part connecting the thin sheet can generate negative pressure on the open end surface of the empty box under the action of centrifugal force.

In the first embodiment, the rotating part of the rotation source and the empty box body can be connected on the side of the end face opposite to the open end face of the empty box body, or on one side of the open end face. The connection method is selected according to the usage scenario. In the second embodiment, the rotation source can be installed on the outside of the end face opposite to the open end face of the empty box body, or on the inner end face of the empty box body, or on one side of the open end of the empty box body. The rotation source is indirectly connected to the empty box body, and the connection method is selected according to the usage scenario.

Whether the inside of the empty box is a closed space or a nearly closed space has a direct relationship to the size of the negative pressure generated and the distance at which the negative pressure is generated. The closer to a closed space, the greater the negative pressure generated. It has no direct relationship with the shape of the empty box. The shape of the inner wall of the empty box can also be changed to guide the airflow to flow out quickly. Empty boxes of various shapes are closed or nearly closed spaces, and negative pressure can be generated during operation.

The characteristics of air are that it is easy to compress, has mass, inertia, adhesion, and generates centrifugal force when it rotates. When the thin sheets are regularly distributed in the empty box, a regular fan-shaped space is formed. The area composed of the length and height of the thin sheet is the smallest. When it rotates, the entire front surface of the thin sheet in the direction of rotation compresses the air due to inertia, and the entire back surface of the thin sheet produces a vacuum area. The atmospheric pressure will instantly fill the air with the height of a thin sheet at the open end of the empty box to the back of the thin sheet. The air flows very fast, and its viscosity will pull the air around it to flow. The area of the thin sheet affects the speed of air flowing into the empty box. Under the premise of the same height and length, the spatial distribution increases the area of the front and back of the thin sheet as much as possible. The thin sheets are irregularly distributed in the fan-shaped space in three directions, without affecting the air flowing into the innermost end of the thin sheet and doing centrifugal motion, forming an irregular fan-shaped space. While ensuring the strength of the thin sheet, the surface area of the front and back of the thin sheet is increased to the maximum extent possible. The height and diameter of the thin sheet are the same, and the area of the irregular distribution is larger than that of the regular distribution. The vacuum area generated on the entire back of the thin sheet requires more air and can also pull more air flow.

Between two adjacent thin sheets, there is a vacuum surface and a compression surface. The air is compressed and pressed in almost simultaneously. Assume that the rotation of the thin sheet is regarded as a gradual rotation of one microsecond at a time, just like a brushless motor, the magnetic field is switched to continue rotating. Then the air begins to make centrifugal motion on the entire surface of the compression surface. Under ideal conditions, due to the existence of viscosity, the pressure of the air layer directly contacting the compression surface of the thin sheet will be relatively small during the air flow. The air makes centrifugal motion on the entire compression surface and reaches the inner wall of the empty box during the gradual rotation. Assuming that turbulence occurs during the air flow, the turbulence is also negative pressure and continues to rotate with the thin sheet. The existence of viscosity continues to compress the inner wall of the empty box, forming an annular compression layer. The pressure continues to increase and finally expands and flows out.

The airflow that flows out due to high-speed rotation and expansion will have a small amount of downward pressure, which will affect the adsorption effect. A guide device is installed on the open end face. The inner wall of the guide device is equal to the inner wall of the empty box. The inner wall to the bottom end face of the guide device is tangent or deflected at an angle. The gas has a certain adhesion force. The gas that obtains kinetic energy will flow out along the arc or angle deflection to change direction, thereby improving the adsorption effect. In Example 1, when the guide device rotates synchronously with the empty box, the air on the bottom surface of the guide device will have a pulling force from the inside to the outside along the bottom surface under the action of centrifugal force due to adhesion. The thin sheets are regularly or irregularly distributed, and the inner wall of the guide device is tangent to the arc of the bottom surface or deflected at an angle. Even if the angle is deflected only once, the empty box will be diverted when it rotates forward or reversely. In Example 2, the length, width and height of the thin sheets are irregularly distributed. When the thin sheets rotate forward, the guide device will divert the flow to the bottom end face. When the thin sheets are reversed, the outflowing air will form a circulating turbulent flow in front of the opening of the empty box. When the length, width and height of the thin sheets are regularly distributed or the height is regularly distributed, forward or reverse rotation Circulating turbulence will be generated. In the first embodiment, the guide device does not rotate with the empty box, and the guide effect is consistent with that of the second embodiment. Isolation guide devices 17 and 18 are used, and the thin sheets are regularly or irregularly distributed. Both positive and reverse installations can achieve isolation and diversion. When the thin sheet protection device is connected to the upper end face of the isolation device, the diameter of the upper end face of the isolation guide device will be reduced, so that the isolation guide devices 12 and 16 that generate circulating turbulence can regain the isolation function.

When the isolation and diversion duct is too long, it may cause the chimney effect to enhance the effect when adsorbing hot gas. When adsorbing normal temperature gas or dust particles, it can cooperate with the fan to improve efficiency.

In the model test experiment, under the same power, the hand is placed in front of the open end face of the empty box. When the distance is far, the air can be felt to flow slightly. It slowly approaches the open end face of the empty box. When it reaches a distance, you can clearly feel that the hand is being pulled over. It can also be understood as the distance for generating negative pressure. The distance for generating negative pressure by the guide devices 13, 14, and 15 is greater than that by the isolation guide devices 12 and 16. The distance for generating negative pressure by the isolation guide devices 12 and 16 is greater than that by the isolation guide devices 17 and 18. The distance for generating negative pressure is large. When adsorbing sheet objects, the former is used as much as possible to achieve non-contact adsorption in the air. When adsorbing gases, the isolation guide device is preferred.

The outflow speed of the air flow inside the empty box affects the negative pressure on the open end face. The thin film is deflected at a certain angle relative to the horizontal to accelerate the flow rate. The gas obtains an upward or downward force while gaining centrifugal force. The action and reaction forces cause the gas on the inner wall to flow out at high speed, or the balance point is measured between the closed and nearly closed empty box to reduce the annular compression layer and improve the negative pressure efficiency.

The thin slices are distributed vertically, and the gas that obtains centrifugal force continuously gathers and reaches the inner wall of the empty box. The increased pressure of the gas causes the gas to flow upward or downward or reach the internal end face, and the action and reaction force finally causes it to flow out of the open end face.

For thicker hollow boxes, the inner wall of the hollow box can be tangent to the open end face or deflected at an angle to change the direction of gas outflow.

For an empty box that is relatively thin and has good toughness, the end faces adjacent to the opening end faces can extend outward to act as flow-guiding devices, such as a bell mouth.

The thin sheet inside the empty box rotates at high speed. When adsorbing solid or flexible objects smaller than the opening end surface of the empty box, they are easily sucked into them and may damage the thin sheet. Solids larger than the opening end surface of the empty box will be adsorbed on the opening end surface of the empty box, which is not easy to damage the thin sheet. You can choose whether to install a thin sheet protection device according to the adsorption object and usage scenario.

When adsorbing solid flakes that are larger than the open end face of the empty box, the gas flow rate inside the empty box slows down, but the flakes still rotate at high speed, creating a certain degree of vacuum and significantly increasing the noise. In situations where noise is restricted, you can choose whether to install auxiliary support devices based on usage needs, calculate the object weight and adsorption force, and keep the adsorbed object at a suitable distance from the open end face of the empty box, leaving space so that the gas inside the empty box can flow in and out smoothly, significantly reducing noise.

When adsorbing gas, you can choose whether to install a guide device and an auxiliary support device according to requirements to change the outflow direction of the outflowing gas. When the guide device is not installed, the gas mainly flows in from the middle of the open end face of the empty box body, and flows out from the surrounding of the open end face of the empty box body in a rotating cone-shaped diffusion. The gas has adhesion and kinetic energy generated by centrifugal force. The guide device can change the direction of the outflowing gas. When the rotating part of the rotating source is connected to the object surrounded by the thin sheet on one side of the opening end, the rotating part of the rotating source can be used as an auxiliary support device.

The optimal distribution method of the slices can be selected according to the difficulty of processing technology, materials, cost, etc.

If the sheet protection device is made of heating material or heat-conducting material, it can be combined with a flow guide device or an isolation flow guide device to absorb the gas on its surface, and the heating material or heat-conducting material can be equipped with heat-conducting fins to increase the contact area with the air, such as electric heating wire, heat pipe, copper pipe, silver pipe, etc. Or it can be combined with an isolation flow guide device to absorb the heat-generating object on the hollow breathable surface, and the heat-generating object can be used as a sheet protection device.

In the experimental test, the guide device was not installed and the guide devices 13 and 14 were installed. The gas that expanded and flowed out at a high speed would give a force to the empty box. When the isolation guide device was installed, the expanded gas that flowed out would give a force to the isolation guide devices 12, 16, 17, and 18 after passing through the isolation guide and the final outlet. The guide cone 15 was installed, and the angle between the cone and the horizontal plane was about 8 degrees. When the cone area was larger than twice the end surface area of the empty box opening, a critical point would appear. Before the critical point, a reaction force was given to the box. After exceeding the critical point, the force was just the opposite, and the force generated by the positive rotation of the sheet was smaller than the force generated by the reverse rotation of the sheet.

A guide device 13 is installed on the open end face of the empty box body. The inner wall of the guide device is the same as the inner wall of the empty box body. There is an arc transition with a radius of 5mm from the inner wall to the bottom plane of the guide device. When the power is turned on for testing, the airflow rotates horizontally along the bottom plane of the guide device and flows out at high speed.

The airflow of the empty box is sucked in from the middle, diffuses and flows out from the open end face of the inner wall of the empty box at a high speed, and enters and exits on the same plane. When the guide device 15 is installed, the bottom end face has a certain angle deflection to assist the high-speed outflowing airflow, isolates and keeps it away from the adsorbed objects. The high-speed outflowing gas has a certain sealing property, and the gas enters from the middle of the circular ring disk of the guide device.

The guide device can be installed on the open end face of the empty box body, or on the non-rotating part of the non-contact suction cup. In the embodiment, when the box body rotates and the guide device has a large mass, it is installed on the open end face and rotates with the box body to increase the motor power. The function of the guide device is to change the direction of the outflowing airflow. A small gap can be left with the open end face of the empty box body and connected to other non-rotating parts. Whether to install it depends on the process occasion and what kind of guide device to install depends on the need.

The function of the thin film protection device is to protect the thin film on the open end face of the empty box. It can be installed on the open end face, or it can be connected to other parts that do not participate in the rotation, or it can keep a distance from the open end face. It can protect the thin film and serve as auxiliary support. Whether to install the protection device depends on the process situation.

If auxiliary support needs to be installed, the auxiliary support is in direct contact with the adsorbed object and can also play an anti-slip role. The connection method should be connected to the non-rotating part of the non-contact suction cup.

According to the action and reaction forces, when the negative pressure generated by the open end face of the empty box is greater than its weight, it can also be adsorbed on objects.

The test was conducted on a box with a built-in motor installed. Eight through holes with a diameter of 3mm were left on the end face of the box for fixing with screws. In the test without closed through holes, it was found that the negative pressure was not significantly different from that in the test with closed through holes. The same was true when several through holes were opened around the empty box. The angled sheet rotated forward, and the small through holes on the end face inhaled air, and the small through holes on the reversed end face exhausted air. The sheet without an angle rotated forward, reversed, and the small through holes exhausted air.

Model test example 1:

It uses a 2205 outer rotor brushless motor, 2300KV. The object surrounded by the thin film has a diameter of 58mm, a height of 20mm, and a width of 1.8mm. The object uses 15 thin films. The angle between the thin film and the horizontal plane on the side close to the center of the circle is 75 degrees, and the angle between the thin film and the horizontal plane on the outside is 45 degrees. The inner diameter of the empty box is 62mm, the outer diameter of the empty box is 66mm, and the height of the empty box is 40mm. The motor is built into the inner end surface of the box.

Assemble and install, power on for testing, the motor rotates forward, under the condition of voltage 12.1V, current 1A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 110g, the highest air flow rate at the open end face is about 14 meters per second, the lifting distance is about 15mm, the weighing pan reads about negative 60g, continue to lift to about 100mm, the weighing pan reads 0.

The motor reverses. When the voltage is 12.1V and the current is 1A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 120g. The highest air flow rate at the open end face is about 18 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 60g. Continue to lift it to about 100mm, and the weighing pan reads 0.

When the motor rotates forward, the guide device 13 is installed at a position 1mm away from the weighing pan. The weighing pan reads about negative 140g. The highest air flow velocity at the measured opening end face is about 12 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 70g. It continues to be lifted to about 100mm, and the weighing pan reads 0.

The motor is reversed to install the guide device 13 at a distance of 1mm from the weighing pan. The weighing pan reads about negative 145g. The highest air flow rate at the measured opening end face is about 17 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 70g. Continue to lift it to about 100mm, and the weighing pan reads 0.

When the motor rotates forward, the voltage is 12.1V and the current is 2A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 190g, the highest air flow rate at the open end face is about 18 meters per second, the lifting distance is about 15mm, the weighing pan reads about negative 90g, continue to lift to about 100 mm, the weighing pan reads 0.

When the motor reverses, the voltage is 12.1V, and the current is 2A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 210g, the highest air flow rate at the open end face is about 18 meters per second, the lifting distance is about 15mm, the weighing pan reads about negative 100g, continue to lift to about 100mm, the weighing pan reads 0.

The motor rotates forward, and the guide device 13 is installed 1mm away from the weighing pan. The weighing pan reads about negative 245g. The highest air flow velocity at the measured opening end face is about 16 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 125g. Continue to lift it to about 100mm, and the weighing pan reads 0.

The motor reverses and the guide device 13 is installed 1mm away from the weighing pan. The weighing pan reads about negative 275g. The highest air flow rate at the open end face is about 22 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 125g. Continue to lift it to about 100mm, and the weighing pan reads 0.

Model test example 2:

It uses 2205 outer rotor brushless motor, 2300KV, the object surrounded by the thin slices has a diameter of 58mm, a height of 20mm, and a width of 1.8mm. The object uses 15 thin slices, which are perpendicular to the horizontal plane and are regularly distributed in a fan shape in the length direction. The rotation direction is not affected. The inner diameter of the empty box is 62mm, the outer diameter of the empty box is 66mm, and the height of the empty box is 40mm. The motor is built into the inner end surface of the box.

Assemble and install, power on test, under the condition of voltage 12.1V, current 1A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 110g, the highest air flow rate at the open end face is about 14 meters per second, the lifting distance is about 15mm, the weighing pan reads about negative 60g, continue to lift to about 100mm, the weighing pan reads 0.

Install the guide device 13 at a distance of 1mm from the weighing pan. The weighing pan reads about negative 140g. The highest air velocity at the open end face is about 12 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 70g. Continue to lift it to about 100mm, and the weighing pan reads 0.

Under the condition of voltage of 12.1V and current of 2A, hold the empty box with the opening facing downwards, 1mm away from the weighing pan, the weighing pan reads about negative 190g, the highest air flow rate at the open end face is about 18 meters per second, the lifting distance is about 15mm, the weighing pan reads about negative 90g, continue to lift to about 100mm, the weighing pan reads 0.

Install the guide device 13 at a distance of 1mm from the weighing pan. The weighing pan reads about negative 240g. The highest air velocity at the open end face is about 16 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 120g. Continue to lift it to about 100mm, and the weighing pan reads 0.

Model test example 3:

There are 8 screw holes with a diameter of 3mm on the upper end face of the empty box, and 140 through holes with a diameter of 2mm around the empty box. It uses a 2205 outer rotor brushless motor, 2300KV, the object surrounded by the thin sheet has a diameter of 58mm, a height of 20mm, and a width of 1.8mm. The object uses 15 thin sheets, and the angle between the thin sheet and the horizontal plane on the side close to the center of the circle is 75 degrees, and the angle between the outer measure of the thin sheet and the horizontal plane is 45 degrees. The inner diameter of the empty box is 62mm, the outer diameter of the empty box is 66mm, and the height of the empty box is 40mm. The motor is built into the inner end face of the box.

Assemble and install, power on for testing, the motor rotates forward, under the condition of voltage 12.1V, current 1A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 120g, the highest air flow rate at the open end face is about 14 meters per second, the lifting distance is about 10mm, the weighing pan reads about negative 60g, continue to lift to about 80mm, the weighing pan reads 0.

The motor reverses. When the voltage is 12.1V and the current is 1A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 160g. The highest air flow rate at the open end face is about 17 meters per second. The lifting distance is about 10mm, and the weighing pan reads about negative 80g. Continue to lift it to about 80mm, and the weighing pan reads 0.

When the motor rotates forward, the guide device 13 is installed at a position 1mm away from the weighing pan. The weighing pan reads about negative 125g. The highest air flow velocity at the measured opening end face is about 13 meters per second. The lifting distance is about 10mm, and the weighing pan reads about negative 60g. It continues to be lifted to about 80mm, and the weighing pan reads 0.

The motor is reversed to install the guide device 13 at a position 1mm away from the weighing pan. The weighing pan reads about negative 190g. The highest air flow rate at the measured opening end face is about 16 meters per second. The lifting distance is about 10mm, and the weighing pan reads about negative 80g. Continue to lift it to about 80mm, and the weighing pan reads 0.

When the motor rotates forward, the voltage is 12.1V and the current is 2A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 210g, the highest air flow rate at the open end face is about 19 meters per second, the lifting distance is about 10mm, the weighing pan reads about negative 100g, continue to lift to about 80mm, the weighing pan reads 0.

When the motor reverses, the voltage is 12.1V, and the current is 2A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 270g, the highest air flow rate at the open end face is about 23 meters per second, the lifting distance is about 10mm, the weighing pan reads about negative 140g, continue to lift to about 80mm, the weighing pan reads 0.

The motor rotates forward, and the guide device 13 is installed 1mm away from the weighing pan. The weighing pan reads about negative 200g. The highest air flow velocity at the measured opening end face is about 18 meters per second. The lifting distance is about 10mm, and the weighing pan reads about negative 100g. Continue to lift it to about 80mm, and the weighing pan reads 0.

The motor reverses and the guide device 13 is installed at a position 1mm away from the weighing pan. The weighing pan reads about negative 290g. The highest air flow rate at the measured opening end face is about 21 meters per second. The lifting distance is about 10mm, and the weighing pan reads about negative 145g. Continue to lift it to about 80mm, and the weighing pan reads 0.

Model test example 4:

There are 8 screw holes with a diameter of 3mm on the upper end face of the empty box, and 140 through holes with a diameter of 2mm around the empty box. It uses a 2205 outer rotor brushless motor, 2300KV, and the object surrounded by the thin slices has a diameter of 58mm, a height of 20mm, and a width of 1.8mm. The object uses 15 thin slices, which are perpendicular to the horizontal plane and are regularly distributed in a fan-shaped pattern in the length direction. The rotation direction is not affected. The inner diameter of the empty box is 62mm, the outer diameter of the empty box is 66mm, and the height of the empty box is 40mm. The motor is built into the inner end face of the box.

Assemble and install, power on test, under the condition of voltage 12.1V, current 1A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 140g, the highest air flow rate at the open end face is about 16 meters per second, the lifting distance is about 10mm, the weighing pan reads about negative 70g, continue to lift to about 80mm, the weighing pan reads 0.

Install the guide device 13 at a distance of 1mm from the weighing pan. The weighing pan reads about negative 170g. The highest air velocity at the open end face is about 15 meters per second. The lifting distance is about 10mm, and the weighing pan reads about negative 80g. Continue to lift it to about 80mm, and the weighing pan reads 0.

Under the condition of voltage of 12.1V and current of 2A, hold the empty box with the opening facing downwards, 1mm away from the weighing pan, the weighing pan reads about negative 240g, the highest air flow rate at the open end face is about 21 meters per second, the lifting distance is about 10mm, the weighing pan reads about negative 120g, continue to lift to about 80mm, the weighing pan reads 0.

Install the guide device 13 at a distance of 1mm from the weighing pan. The weighing pan reads about negative 260g. The highest air velocity at the open end face is about 18 meters per second. The lifting distance is about 10mm, and the weighing pan reads about negative 130g. Continue to lift it to about 80mm, and the weighing pan reads 0.

Model test example 5:

There are 8 screw holes with a diameter of 3mm on the upper end face of the empty box, and 140 through holes with a diameter of 3mm around the empty box. It uses a 2205 outer rotor brushless motor, 2300KV, the object surrounded by the thin film has a diameter of 58mm, a height of 20mm, and a width of 1.8mm. The object uses 15 thin films, and the angle between the thin film and the horizontal plane on the side close to the center of the circle is 75 degrees, and the angle between the thin film and the horizontal plane is 45 degrees. The inner diameter of the empty box is 62mm, the outer diameter of the empty box is 66mm, and the height of the empty box is 40mm. The motor is built into the inner end face of the box.

Assemble and install, power on for testing, the motor rotates forward, under the condition of voltage 12.1V, current 1A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 65g, the highest air flow rate at the open end face is about 12 meters per second, the lifting distance is about 10mm, the weighing pan reads about negative 35g, continue to lift to about 70mm, the weighing pan reads 0.

The motor reverses. When the voltage is 12.1V and the current is 1A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 120g. The highest air flow rate at the open end face is about 15 meters per second. The lifting distance is about 10mm, and the weighing pan reads about negative 60g. Continue to lift it to about 70mm, and the weighing pan reads 0.

When the motor rotates forward, the guide device 13 is installed at a position 1mm away from the weighing pan. The weighing pan reads about negative 80g. The highest air flow velocity at the measured opening end face is about 10 meters per second. The lifting distance is about 10mm, and the weighing pan reads about negative 40g. It continues to be lifted to about 70mm, and the weighing pan reads 0.

The motor is reversed to install the guide device 13 at a position 1mm away from the weighing pan. The weighing pan reads about negative 140g. The highest air flow rate at the measured opening end face is about 14 meters per second. The lifting distance is about 10mm, and the weighing pan reads about negative 70g. Continue to lift it to about 70mm, and the weighing pan reads 0.

When the motor rotates forward, the voltage is 12.1V and the current is 2A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 110g, the highest air flow rate at the open end face is about 15 meters per second, the lifting distance is about 10mm, the weighing pan reads about negative 60g, continue to lift to about 80mm, the weighing pan reads 0.

When the motor reverses, the voltage is 12.1V, and the current is 2A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 210g, the highest air flow rate at the open end face is about 21 meters per second, the lifting distance is about 10mm, the weighing pan reads about negative 100g, continue to lift to about 70mm, the weighing pan reads 0.

The motor rotates forward, and the guide device 13 is installed 1mm away from the weighing pan. The weighing pan reads about negative 125g. The highest air flow velocity at the measured opening end face is about 15 meters per second. The lifting distance is about 10mm, and the weighing pan reads about negative 65g. Continue to lift it to about 70mm, and the weighing pan reads 0.

The motor reverses and the guide device 13 is installed at a position 1mm away from the weighing pan. The weighing pan reads about negative 230g. The highest air flow rate at the measured opening end face is about 19 meters per second. The lifting distance is about 10mm, and the weighing pan reads about negative 110g. It continues to lift to about 70mm, and the weighing pan reads 0.

Model test example 6:

There are 8 screw holes with a diameter of 3mm on the upper end face of the empty box, and 140 through holes with a diameter of 3mm around the empty box. It uses a 2205 outer rotor brushless motor, 2300KV, and the object surrounded by the thin slices has a diameter of 58mm, a height of 20mm, and a width of 1.8mm. The object uses 15 thin slices, which are perpendicular to the horizontal plane and are regularly distributed in a fan-shaped pattern in the length direction. The rotation direction is not affected. The inner diameter of the empty box is 62mm, the outer diameter of the empty box is 66mm, and the height of the empty box is 40mm. The motor is built into the inner end face of the box.

Assemble and install, power on test, under the condition of voltage 12.1V, current 1A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 105g, the highest air flow rate at the open end face is about 13 meters per second, the lifting distance is about 10mm, the weighing pan reads about negative 60g, continue to lift to about 70mm, the weighing pan reads 0.

Install the guide device 13 at a distance of 1mm from the weighing pan. The weighing pan reads about negative 120g. The highest air velocity at the open end face is about 12 meters per second. The lifting distance is about 10mm, and the weighing pan reads about negative 60g. Continue to lift it to about 70mm, and the weighing pan reads 0.

Under the conditions of voltage of 12.1V and current of 2A, hold the empty box with the opening facing downwards, 1mm away from the weighing pan, the weighing pan reads about negative 195g, the highest air velocity at the open end face is about 17 meters per second, the lifting distance is about 10mm, the weighing pan reads about negative 90g, continue to lift to about 70mm, the weighing pan reads 0.

Install the guide device 13 at a distance of 1mm from the weighing pan. The weighing pan reads about negative 210g. The highest air velocity at the open end face is about 16 meters per second. The lifting distance is about 10mm, and the weighing pan reads about negative 100g. Continue to lift it to about 70mm, and the weighing pan reads 0.

Model test example 7:

It uses a 2205 outer rotor brushless motor, 2300KV. The object surrounded by the thin film has a diameter of 80mm, a height of 30mm, and a width of 2mm. The object uses 15 thin films. The angle between the thin film and the horizontal plane on the side close to the center of the circle is 75 degrees, and the angle between the thin film and the horizontal plane on the outside is 45 degrees. The inner diameter of the empty box is 82mm, the outer diameter of the empty box is 86mm, and the height of the empty box is 55mm. The motor is built into the inner end surface of the box.

Assemble and install, power on for testing, the motor rotates forward, under the condition of voltage 12.1V, current 1A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 190g, the highest air flow rate at the open end face is about 11 meters per second, the lifting distance is about 15mm, the weighing pan reads about negative 100g, continue to lift to about 100mm, the weighing pan reads 0.

The motor reverses. When the voltage is 12.1V and the current is 1A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 220g. The highest air flow rate at the open end face is about 15 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 110g. Continue to lift it to about 100mm, and the weighing pan reads 0.

When the motor rotates forward, the guide device 13 is installed at a position 1mm away from the weighing pan. The weighing pan reads about negative 220g. The highest air flow velocity at the measured opening end face is about 10 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 110g. It continues to be lifted to about 100mm, and the weighing pan reads 0.

When the motor is reversed, the guide device 13 is installed at a position 1mm away from the weighing pan. The weighing pan reads about negative 230g. The highest air flow velocity at the measured opening end face is about 14 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 110g. It continues to be lifted to about 100mm, and the weighing pan reads 0.

When the motor rotates forward, the voltage is 12.1V and the current is 2A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 320g, the highest air flow rate at the open end face is about 15 meters per second, the lifting distance is about 15mm, the weighing pan reads about negative 160g, continue to lift to about 100mm, the weighing pan reads 0.

When the motor reverses, the voltage is 12.1V, and the current is 2A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 340g, the highest air flow rate at the open end face is about 18 meters per second, the lifting distance is about 15mm, the weighing pan reads about negative 170g, continue to lift to about 100mm, the weighing pan reads 0.

The motor rotates forward, and the guide device 13 is installed 1mm away from the weighing pan. The weighing pan reads about negative 360g. The highest air flow velocity at the measured opening end face is about 13 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 180g. Continue to lift it to about 100mm, and the weighing pan reads 0.

The motor reverses and the guide device 13 is installed 1mm away from the weighing pan. The weighing pan reads about negative 350g. The highest air flow rate at the measured opening end face is about 17 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 170g. Continue to lift it to about 100mm, and the weighing pan reads 0.

Model test example 8:

It uses 2205 outer rotor brushless motor, 2300KV, the object surrounded by the thin film has a diameter of 80mm, a height of 30mm, and a width of 2mm. The object uses 15 thin films, which are perpendicular to the horizontal plane and are regularly distributed in a fan shape in the length direction. The rotation direction is not affected. The inner diameter of the empty box is 82mm, the outer diameter of the empty box is 86mm, and the height of the empty box is 55mm. The motor is built into the inner end surface of the box.

Assemble and install, power on test, under the condition of voltage 12.1V, current 1A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 200g, the highest air flow rate at the open end face is about 14 meters per second, the lifting distance is about 10mm, the weighing pan reads about negative 100g, continue to lift to about 100mm, the weighing pan reads 0.

Install the guide device 13 at a distance of 1mm from the weighing pan. The weighing pan reads about negative 220g. The highest air velocity at the open end face is about 9 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 110g. Continue to lift it to about 100mm, and the weighing pan reads 0.

Under the conditions of voltage of 12.1V and current of 2A, hold the empty box with the opening facing downwards, 1mm away from the weighing pan, the weighing pan reads about negative 340g, the highest air velocity at the open end face is about 13 meters per second, the lifting distance is about 15mm, the weighing pan reads about negative 170g, continue to lift to about 100mm, the weighing pan reads 0.

Install the guide device 13 at a distance of 1mm from the weighing pan. The weighing pan reads about negative 360g. The highest air velocity at the open end face is about 12 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 180g. Continue to lift it to about 100mm, and the weighing pan reads 0.

Model test example 9:

It adopts 2205 outer rotor brushless motor, 2300KV, the object surrounded by the thin film has a diameter of 58mm, a height of 20mm, and a width of 1.8mm. The object uses 15 thin films, which are perpendicular to the horizontal plane and are regularly distributed in a fan shape in the length direction. The rotation direction is not affected. The inner diameter of the empty box is 82mm, the outer diameter of the empty box is 86mm, and the height of the empty box is 55mm. The motor is built into the inner end surface of the box.

Assemble and install, power on test, under the condition of voltage 12.1V, current 1A, hold the empty box with the opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 210g, the highest air flow rate at the open end face is about 14 meters per second, the lifting distance is about 10mm, the weighing pan reads about negative 100g, continue to lift to about 100mm, the weighing pan reads 0.

Install the guide device 13 at a distance of 1mm from the weighing pan. The weighing pan reads about negative 220g. The highest air velocity at the open end face is about 12 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 110g. Continue to lift it to about 100mm, and the weighing pan reads 0.

Under the conditions of voltage of 12.1V and current of 2A, hold the empty box with the opening facing downwards, 1mm away from the weighing pan, the weighing pan reads about negative 340g, the highest air flow rate at the open end face is about 18 meters per second, the lifting distance is about 15mm, the weighing pan reads about negative 170g, continue to lift to about 100mm, the weighing pan reads 0.

Install the guide device 13 at a distance of 1mm from the weighing pan. The weighing pan reads about negative 360g. The highest air velocity at the open end face is about 18 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 180g. Continue to lift it to about 100mm, and the weighing pan reads 0.

Model test example 10:

It uses 2204 outer rotor brushless motor, 2850KV, empty box diameter 66mm, empty box inner wall 62mm. The height of the object surrounded by the thin sheet in the empty box is 20mm, the width is 1.8mm, the angle between the thin sheet and the horizontal plane on the side close to the center of the circle is 75 degrees, and the angle between the outer side of the thin sheet and the horizontal plane is 45 degrees, dividing the empty box into 15 irregular fan-shaped small spaces.

Assemble and install, power on for testing, the empty box rotates forward, under the condition of voltage 12.1V and current 1A, hold the fixed bracket with the empty box opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 200g, the highest air flow rate at the open end face is about 14 meters per second, the lifting distance is about 15mm, the weighing pan reads about negative 120g, continue to lift to about 100mm, the weighing pan reads 0.

The empty box is reversed. Under the conditions of voltage of 12.1V and current of 1A, the opening of the empty box is facing downwards by holding the fixed bracket. The distance from the weighing pan to the bracket is 1mm, and the reading on the weighing pan is about negative 230g. The highest air flow rate at the open end face is about 12 meters per second. The lifting distance is about 15mm, and the reading on the weighing pan is about negative 110g. It continues to be lifted to about 100mm, and the reading on the weighing pan is 0.

The empty box is rotated forward and the guide device 13 is installed at a position 1mm away from the weighing pan. The weighing pan reads about negative 240g. The highest air flow velocity at the open end face is about 10 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 120g. It continues to be lifted to about 100mm, and the weighing pan reads 0.

The empty box is reversed and the guide device 13 is installed at a position 1mm away from the weighing pan. The weighing pan reads about negative 250g. The highest air flow velocity at the open end face is about 9 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 120g. It continues to be lifted to about 100mm, and the weighing pan reads 0.

When the empty box body rotates forward, the voltage is 12.1V and the current is 2A, hold the fixed bracket with the empty box opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 380g, the highest air flow rate at the open end face is about 18 meters per second, the lifting distance is about 15mm, the weighing pan reads about negative 190g, continue to lift to about 100mm, the weighing pan reads 0.

When the empty box is reversed, the voltage is 12.1V, and the current is 2A, the opening of the empty box is facing downwards with a handheld fixed bracket, and the scale reads about negative 400g at a distance of 1mm from the weighing pan. The highest air flow rate at the open end face is about 16 meters per second. The lifting distance is about 15mm, and the scale reads about negative 200g. Continue to lift it to about 100mm, and the scale reads 0.

The empty box rotates forward, and the guide device 13 is installed at a distance of 1mm from the weighing pan. The weighing pan reads about negative 400g. The highest air flow velocity at the measured opening end face is about 15 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 200g. It continues to be lifted to about 100mm, and the weighing pan reads 0.

The empty box is reversed, and the guide device 13 is installed at a distance of 1mm from the weighing pan. The weighing pan reads about negative 410g. The highest air flow rate at the open end face is about 12 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 200g. It continues to be lifted to about 100mm, and the weighing pan reads 0.

Model test example 11:

Adopt 2204 outer rotor brushless motor, 2850KV, empty box diameter 66mm, empty box inner wall 62mm. The height of the object surrounded by the thin sheet in the empty box is 20mm, and the width is 1.8mm. The thin sheet is perpendicular to the horizontal plane and divides the empty box into 15 regular fan-shaped small spaces. The negative pressure generated by the positive and negative rotation of the empty box is consistent.

[0060] Assemble and install, power on test, empty box body rotates forward, under the condition of voltage 12.1V, current 1A, hold the fixed bracket with the empty box body opening facing downward, 1mm away from the weighing pan, the weighing pan reading is about negative 200g, the highest air flow rate at the measured opening end face is about 11 meters per second, the lifting distance is about 15mm, the weighing pan reading is about negative 100g, continue to lift to about 100mm, the weighing pan reading is 0.

The guide device 13 is installed on the empty box body at a position 1mm away from the weighing pan when it rotates forward. The weighing pan reads about negative 220g. The highest air flow rate at the open end face is about 9 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 110g. It continues to be lifted to about 100mm, and the weighing pan reads 0.

When the empty box body rotates forward, the voltage is 12.1V and the current is 2A, hold the fixed bracket with the empty box opening facing downward, 1mm away from the weighing pan, the weighing pan reads about negative 370g, the highest air flow rate at the measured open end face is about 18 meters per second, the lifting distance is about 15mm, the weighing pan reads about negative 180g, continue to lift to about 100mm, the weighing pan reads 0.

The empty box rotates forward, and the guide device 13 is installed at a distance of 1mm from the weighing pan. The weighing pan reads about negative 380g. The highest air flow velocity at the measured opening end face is about 12 meters per second. The lifting distance is about 15mm, and the weighing pan reads about negative 190g. It continues to be lifted to about 100mm, and the weighing pan reads 0.

Model test example 12:

Adopt 2204 outer rotor brushless motor, 2850KV, empty box diameter 80mm, empty box inner wall 78mm. The height of the object surrounded by the thin sheet in the empty box is 30mm, the width is 2mm, the angle between the thin sheet and the horizontal plane is 75 degrees near the center of the circle, and the angle between the thin sheet and the horizontal plane is 45 degrees, dividing the empty box into 15 irregular fan-shaped small spaces.

[0060] Assemble and install, power on test, empty box body rotates forward, under the condition of voltage 12.1V, current 1A, hold the fixed bracket with the empty box body opening facing downward, 1mm away from the weighing pan, the weighing pan reading is about negative 270g, the highest air flow rate at the measured opening end face is about 10 meters per second, the lifting distance is about 15 mm, the weighing pan reading is about negative 130g, continue to lift to about 100mm, the weighing pan reading is 0.

The empty box is reversed. Under the conditions of voltage of 12.1V and current of 1A, the opening of the empty box is facing downwards by holding the fixed bracket. The distance from the weighing pan to the bracket is 1mm, and the reading on the weighing pan is about negative 260g. The highest air flow rate at the open end face is about 12 meters per second. The lifting distance is about 15mm, and the reading on the weighing pan is about negative 130g. It continues to be lifted to about 100mm, and the reading on the weighing pan is 0.

Adopt 2204 outer rotor brushless motor, 2850KV, empty box diameter 80mm, empty box inner wall 78mm. The height of the object surrounded by the thin slice in the empty box is 30mm, and the width is 2mm. The thin slice is vertically distributed in the empty box, dividing the empty box into 15 regular fan-shaped small spaces. The positive and negative pressure of the empty box is consistent

[0060] Assemble and install, power on test, empty box body rotates forward, under the condition of voltage 12.1V, current 1A, hold the fixed bracket with the empty box body opening facing downward, 1mm away from the weighing pan, the weighing pan reading is about negative 260g, the highest air flow rate at the measured opening end face is about 10 meters per second, the lifting distance is about 15mm, the weighing pan reading is about negative 130g, continue to lift to about 100mm, the weighing pan reading is 0.

The rotation of the empty box will generate great centrifugal force, which requires the strength and toughness of the materials used. The test model was printed using a light-curing 3D printer and the material was ordinary photosensitive resin. The strength and toughness of the material are unknown. For safety reasons, the negative pressure at a higher speed was not tested.

Physical test example 12:

The protective mask weighs 3g. When the voltage is 12.1V and the current is 0.1A, the open end of the empty box is about 5mm away from the mask, and the mask can be directly sucked up with a power of 1.21 watts.

The protective mask weighs 3g. When the voltage is 12.1V and the current is 1A, the opening end of the closed empty box is about 95mm away from the mask, and the mask can be directly sucked up with a power of 12.1 watts.

The protective mask weighs 3g. Under the conditions of voltage of 12.1V and current of 1A, the open end face of the empty box surrounded by 2mm diameter through holes in the above model test example is about 75mm away from the mask, and the mask can be directly sucked up with a power of 12.1 watts.

The protective mask weighs 3g. Under the conditions of voltage of 12.1V and current of 1A, the open end face of the empty box surrounded by 3mm diameter through holes in the above model test example is about 65mm away from the mask, and the mask can be directly sucked up with a power of 12.1 watts.

The direction of the air flow field in front of the open end face of the dense smoke test, the diameter of the empty box is 66mm, the thin slices are irregularly distributed at an acute angle to the horizontal plane, and the flow diversion of all the diversion devices in Figure 4 is stable. Reverse, the diversion of diversion devices 17.18 is stable, and the thin slices are irregularly distributed at an acute angle to the horizontal plane. When the reversal is consistent, the installation of the remaining diversion devices will generate a circulating turbulent flow in front of the open end face of the empty box. The diameter of the empty box is 86mm, and the circulating turbulent flow generated is smaller than that of the empty box with a diameter of 66mm.

Combining the above model implementation examples, it can be seen that the empty box is a closed space. The difference in negative pressure on the open end face of the empty box when the motor rotates forward and reverse is not much. For a non-closed empty box, the difference in negative pressure between the forward and reverse rotations of the motor is large, and the distance for generating negative pressure also increases with the degree of closure. The greater the degree of closure, the greater the distance for generating negative pressure, until it reaches the same distance as the distance for generating negative pressure on the open end face of a completely closed empty box. The adsorption force of an empty box with a flow guide device is increased by about 10% compared to an empty box without a flow guide device.

The thin sheets are distributed at acute angles. When the motor rotates forward and looks toward the open end face from the inside of the empty box, you can see the vacuum surface on the back of the thin sheet, and the thin sheet forms an acute angle with the horizontal plane. When looking toward the inside of the empty box from the open end face, you can see the compression surface on the front of the thin sheet, which forms an acute angle with the horizontal plane of the open end face. The reverse rotation of the motor is just the opposite, which affects the degree of internal negative pressure. In the model test case, the unclosed empty box has a greater impact on the negative pressure when it is rotated forward or reversely. In the test case, the wall thickness of the empty box is 2mm, and the gas has adhesion. Independent small through holes are used. Smaller through holes also affect the inlet and outlet of the airflow. The open end face is the main inlet and outlet of the gas. As the diameter of the opening increases, the negative pressure generated also decreases significantly.

Under the same power, the negative pressure generated by the rotation of the empty box is greater than the negative pressure generated by the rotation of the thin sheets inside the empty box. A gap must be left when installing the thin sheets in the empty box so that the objects surrounded by the thin sheets can rotate in the empty box. For empty boxes of the same size, the negative pressure generated by objects composed of thin sheets with large diameters and thin sheets with small diameters when installed in the empty box is roughly the same. In the test, only the air flow rate is different. The negative pressure generated by the regular fan-shaped distribution inside the box is smaller than the negative pressure generated by the angled deflection distribution.

An instrument for measuring wind speed is used. The open end face of the empty box is a negative pressure area. The surface area of the instrument affects the flow rate of the gas at the open end face of the empty box, making the open end face of the empty box smaller and the flow rate faster. The wind speed in the test case is larger than the actual wind speed at the open end face of the empty box. The gas flowing out of the empty box with a high-speed rotation without a guide device installed will form a conical closed area in front of the open end face of the empty box. The gas flows in from the middle of the empty box. The direction of the airflow flowing out of the empty box with a guide device installed changes. The wind speed in the test case without the guide device installed is larger than the wind speed at the open end face of the empty box with the guide device installed.

Under the same power, the negative pressure generated by a motor with a higher speed will be slightly higher than that generated by a motor with a lower speed. In the embodiment, two types of motors are used, and the difference in negative pressure is about 5%.

In the model test example, a gram scale is used for testing. The gram scale is light and easy to pick up. A heavy object is placed on it and the reading is reset to zero. The motor and multimeter are connected in series to measure the current. The voltage is fixed. During the test, the current changes continuously as the open end face of the empty box approaches the position of the scale pan. It is adjusted to a similar current. Visual inspection and hand-held testing are used. The area of the counterweight and the room temperature also affect the tested value. It is not an accurate value and there will be a deviation of about 10%. It is for reference only.

The above implementation of the present invention is only an example for clearly illustrating the invention, and is not a limitation on the implementation of the present invention. For ordinary technicians in the field, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

A non-contact suction cup, characterized in that: it comprises a rotation source, a fixed bracket, the fixed bracket is connected to the rotation source; an empty box with an open end face, a plurality of thin sheets with a width smaller than its length and height are connected to a plurality of small spaces formed inside the empty box in a circle around the center of the open end face of the empty box, the empty box with an open end face is connected to the rotating part of the rotation source, a flow guide device is provided on the open end face of the empty box, the center surrounded by the thin sheets is concentric with the rotating part of the rotation source, and the empty box rotates freely around the rotation axis of the rotation source.
A non-contact suction cup, characterized in that: it includes a rotation source, an empty box with an open end face, the rotation source is connected to the end face opposite to the open end face of the empty box with an open end face, a surface composed of a plurality of thin sheets on one side in the width direction and the height direction is connected around the center of a column to form an object, the object is concentrically connected to the rotating part of the rotation source, the object is in the empty box and can rotate freely around the rotation axis of the rotation source, and a guide device is provided on the open end face of the empty box.
The non-contact suction cup according to claim 1 or 2 is characterized in that the inner wall or the outer shape of the hollow box is a regular shape or an irregular shape, the regular shape includes at least one of the following: sphere, cylinder, polygon, the irregular shape includes at least one of the following: cone, trapezoid, irregular polygon, arc, the above shapes can be combined and superimposed.
The non-contact suction cup according to claim 1 or 2 is characterized in that the interior of the empty box is a closed space or the negative pressure generated by the open end surface of the empty box is proportional to the degree of sealing of the interior of the empty box.
The non-contact suction cup according to claim 1 or 2 is characterized in that: the plane formed by the height and length directions of the thin film is perpendicular to the horizontal plane of the opening end face of the empty box body, or the plane formed by the length and height directions of the thin film are respectively distributed at acute angles to the horizontal plane of the opening end face of the empty box body on one side and the outer side close to the center of the circle; the length direction of the thin film is regularly or irregularly distributed, and the plane formed by the length and height directions is perpendicular to or at an acute angle to the horizontal plane of the opening end face, and negative pressure can be generated by rotating clockwise or counterclockwise.
The non-contact suction cup according to claim 1 or 2 is characterized in that the rotation source is a motor.
The non-contact suction cup according to claim 1 or 2 is characterized in that: the guide device is connected to the open end surface of the empty box body or the non-rotating part of the non-contact suction cup to guide the airflow to flow out horizontally or away to isolate the adsorbed object.
The non-contact suction cup according to claim 1 or 2 is characterized in that: the surface adjacent to the opening end face of the empty box body extends outward relative to the opening end face to form a flow guide device, the opening end face is the main inlet and outlet of the gas, and the gas entry and outflow share the same opening end face.
The non-contact suction cup according to claim 1 or 2 is characterized in that it also includes a thin film protection device, and the thin film protection device is connected to the opening end surface of the empty box body or the non-rotating part of the non-contact suction cup.
The non-contact suction cup according to claim 1 or 2 is characterized in that it also includes an auxiliary supporting device, which is connected to the non-rotating part of the non-contact suction cup to assist the opening end surface of the empty box body to avoid contact with the adsorbed object.