CN111268424A - Concentric double-vortex non-contact vacuum suction device - Google Patents
Concentric double-vortex non-contact vacuum suction device Download PDFInfo
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- CN111268424A CN111268424A CN201911417251.9A CN201911417251A CN111268424A CN 111268424 A CN111268424 A CN 111268424A CN 201911417251 A CN201911417251 A CN 201911417251A CN 111268424 A CN111268424 A CN 111268424A
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- end cover
- middle end
- annular gap
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- vortex
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
- B65G47/90—Devices for picking-up and depositing articles or materials
- B65G47/91—Devices for picking-up and depositing articles or materials incorporating pneumatic, e.g. suction, grippers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2249/00—Aspects relating to conveying systems for the manufacture of fragile sheets
- B65G2249/04—Arrangements of vacuum systems or suction cups
- B65G2249/045—Details of suction cups suction cups
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention discloses a concentric double-vortex non-contact vacuum suction device, which comprises an upper end cover, a middle end cover and a lower end cover; the upper end cover, the middle end cover and the lower end cover are fixedly connected with each other; a first annular gap is arranged between the outer circle of the middle end cover and the inner circle of the upper end cover; a second annular gap is arranged between the outer circle of the lower end cover and the inner circle of the middle end cover; the middle end cover is provided with a first cylindrical structure and a second cylindrical structure; a first air inlet hole and a second air inlet hole are respectively arranged in the first cylindrical structure and the second cylindrical structure; a circle of first rotational flow cavity is arranged at the bottom of the middle end cover; a plurality of first tangential nozzles are arranged between the first annular gap and the first cyclone cavity at equal intervals; a circle of second rotational flow cavity is arranged on the bottom surface of the lower end cover; a plurality of second tangential nozzles are arranged between the second annular gap and the second cyclone cavity at equal intervals; the direction of rotation of the first tangential nozzle is opposite to the direction of rotation of the second tangential nozzle. The present invention can suppress rotation of the workpiece during suction while reducing the size of the apparatus.
Description
Technical Field
The invention belongs to the field of non-contact automatic conveying, and particularly relates to a concentric double-vortex non-contact vacuum suction device.
Background
Compared with the traditional contact type vacuum suction technology, the vortex type non-contact vacuum suction can suck the workpiece in a non-contact mode, the suction force can be adjusted according to the quality of the workpiece, the condition that the workpiece is deformed due to overlarge suction force cannot exist, a pneumatic circuit is simple, and the workpiece can be sucked without a vacuum generator. In addition, because a vacuum generator is not needed to generate vacuum, particles such as dust and the like in the air can not be sucked, the cleanness of components is ensured, and the maintenance cost of equipment is also reduced.
Although the scroll type vacuum suction technology realizes non-contact suction of a workpiece, the workpiece can rotate when being sucked due to the existence of rotating airflow, and the rotating speed is increased along with the increase of air supply pressure and flow, so that the stability of the non-contact suction process is greatly influenced. We applied a patent CN110525973A, which discloses a parallel double-vortex non-contact vacuum chuck for suppressing rotation of a workpiece, the chuck adopts a parallel double-vortex structure, the two rotational flows are opposite in rotation direction, so as to suppress rotation of the workpiece during the sucking process, but due to the parallel structure of the chuck, the overall size of the chuck is large, and the workpiece with a small size cannot be sucked, therefore, a vortex non-contact vacuum sucking device with a small size and capable of suppressing rotation of the workpiece is required.
Disclosure of Invention
The invention aims to provide a concentric double-vortex non-contact vacuum suction device to realize non-contact stable suction of a workpiece with a small size.
The technical solution for realizing the purpose of the invention is as follows:
a concentric double-vortex non-contact vacuum suction device comprises an upper end cover, a middle end cover and a lower end cover; the upper end cover, the middle end cover and the lower end cover are fixedly connected with each other; the bottom of the lower end cover is flush with the bottom of the middle end cover; the middle end cover is arranged in the mounting cavity of the upper end cover; a first annular gap is formed between the outer circle of the middle end cover and the inner circle of the upper end cover; the lower end cover is arranged in the mounting cavity of the middle end cover; a second annular gap is formed between the outer circle of the lower end cover and the inner circle of the middle end cover; the middle end cover is provided with a first cylindrical structure and a second cylindrical structure; a first air inlet hole and a second air inlet hole are respectively arranged in the first cylindrical structure and the second cylindrical structure; a plurality of first vent holes are formed in the bottom of the first air inlet hole at equal intervals along the radial direction of the middle end cover; the first vent hole communicates the air inlet with the first annular gap; a circle of first rotational flow cavity is arranged at the bottom of the middle end cover; a plurality of first tangential nozzles are arranged between the first annular gap and the first cyclone cavity at equal intervals, and the first tangential nozzles are axially tangent to the outer wall surface of the first cyclone cavity; the second air inlet hole penetrates through the middle end cover and enters the lower end cover, and a plurality of second air through holes are formed in the bottom of the second air inlet hole at equal intervals along the radial direction of the lower end cover; the second air vent is used for communicating the second air inlet hole with the second annular gap; a circle of second rotational flow cavity is formed in the bottom surface of the lower end cover; a plurality of second tangential nozzles are arranged between the second annular gap and the second cyclone cavity at equal intervals; the axial direction of the second tangential nozzle is tangent to the outer wall surface of the second cyclone cavity; the rotary direction of the first tangential nozzle is opposite to that of the second tangential nozzle; the first rotational flow cavity is coaxial with the second rotational flow cavity; and the contact surface between the upper end cover and the middle end cover and the contact surface between the middle end cover and the lower end cover are sealed.
Compared with the prior art, the invention has the following remarkable advantages:
(1) the invention adopts a concentric structure for the internal and external rotary cavities and a space layout mode for the air supply flow passage, and reduces the whole size of the device under the same condition, thereby being capable of sucking workpieces with smaller size.
(2) The invention adopts a double-vortex structure, and the centers of the two vortex cavities are superposed, so that under the condition of introducing different air supply pressures of the inner vortex, the rotation moment on the workpiece can be balanced by adjusting the air supply pressure of the outer vortex, and the rotation of the workpiece after being sucked is inhibited.
Drawings
Fig. 1 is a schematic view of an assembly structure of a concentric double-vortex non-contact vacuum suction device of the present invention.
Fig. 2 and 3 are schematic top and bottom views of the upper end cap of the concentric double-vortex non-contact vacuum suction device of the present invention.
Fig. 4 and 5 are schematic top and bottom views of an end cap of the concentric double-vortex non-contact vacuum suction device of the present invention.
Fig. 6 and 7 are schematic top and bottom views of the lower end cap of the concentric double-vortex non-contact vacuum suction device of the present invention.
Detailed Description
The invention is further described with reference to the following figures and embodiments.
The invention relates to a concentric double-vortex non-contact vacuum suction device, which comprises an upper end cover 1, a middle end cover 2 and a lower end cover 3; the upper end cover 1, the middle end cover 2 and the lower end cover 3 are fixedly connected with each other; the bottom of the lower end cover 3 is flush with the bottom of the middle end cover 2; the middle end cover 2 is arranged in the mounting cavity of the upper end cover 1; a first annular gap 16 is arranged between the outer circle of the middle end cover 2 and the inner circle of the upper end cover 1; the lower end cover 3 is arranged in the mounting cavity of the middle end cover 2; a second annular gap 14 is formed between the outer circle of the lower end cover 3 and the inner circle of the middle end cover 2; the middle end cover 2 is provided with a first cylindrical structure 2-1 and a second cylindrical structure 2-2; a first air inlet hole 6 and a second air inlet hole 7 are respectively arranged in the first cylindrical structure 2-1 and the second cylindrical structure 2-2; a plurality of first vent holes 5 are arranged at the bottom of the first air inlet hole 6 at equal intervals along the radial direction of the middle end cover 2; the first vent hole 5 communicates the inlet hole 6 with the first annular gap 16; the bottom of the middle end cover 2 is provided with a circle of first rotational flow cavity 15; a plurality of first tangential nozzles 9 are arranged between the first annular gap 16 and the first rotational flow cavity 15 at equal intervals, and the axial direction of each first tangential nozzle 9 is tangential to the outer wall surface of the first rotational flow cavity 15; the second air inlet hole 7 penetrates through the middle end cover 2 and enters the lower end cover 3, and a plurality of second air through holes 12 are formed in the bottom of the second air inlet hole 7 at equal intervals along the radial direction of the lower end cover 3; the second vent hole 12 communicates the second inlet hole 7 with the second annular gap 14; a circle of second rotational flow cavity 13 is formed in the bottom surface of the lower end cover 3; a plurality of second tangential nozzles 11 are arranged between the second annular gap 14 and the second vortex cavity 13 at equal intervals; the axial direction of the second tangential nozzle 11 is tangent to the outer wall surface of the second rotational flow cavity 13; the direction of rotation of the first tangential nozzle 9 is opposite to the direction of rotation of the second tangential nozzle 11; the first vortex cavity 15 is coaxial with the second vortex cavity 13; the contact surface between the upper end cover 1 and the middle end cover 2 and the contact surface between the middle end cover 2 and the lower end cover 3 are sealed, and the first annular gap 16 and the second annular gap 14 are prevented from leaking gas from the contact surfaces of the upper end cover 1 and the middle end cover 2 and the contact surfaces of the middle end cover 2 and the lower end cover 3 respectively.
As an implementation mode, a circle of sealing groove 4 is arranged at the upper end of the middle end cover 2 and used for arranging a sealing ring, a circle of sealing groove 8 is arranged at the lower end of the upper end cover 1, and a sealing ring is arranged in the sealing groove and used for sealing a first annular gap 16 between the upper end cover 1 and the middle end cover 2; the lower end of the middle end cover 2 is provided with a circle of sealing groove 10, and a sealing ring is arranged in the sealing groove and used for sealing a second annular gap 14 between the middle end cover 2 and the lower end cover 3.
Further, a chamfer structure 3-1 is arranged on the inner side of the second vortex cavity 13, so that the inner side of the second vortex cavity 13 is of a downward opening expansion structure, and the suction force of the concentric double-vortex non-contact vacuum suction device is improved.
Furthermore, the outer sides of the first vortex cavity 15 and the second vortex cavity 13 are respectively provided with a first step chamfer structure 2-3 and a second step chamfer structure 3-2, so that the outer sides of the first vortex cavity 15 and the second vortex cavity 13 are both structures with downward opening expansion, and the oscillation of workpieces during the working of the device is reduced.
Preferably, the upper ends of the first air inlet holes 6 and the second air inlet holes 7 are both internally threaded holes, so that the threaded pipe joint can be conveniently connected to supply air to the device, and the threaded connection also has certain sealing performance.
The working process of the concentric double-vortex non-contact vacuum suction device comprises the following steps: compressed air enters the annular gap 14 through the second air inlet hole 7, then enters the annular gap 14 through the second air vent hole 12, and then is ejected through the second tangential nozzle 11 to rotate at a high speed in the second vortex cavity 13, due to the action of centrifugal force, the air at the center of the vortex cavity is thrown to the wall surface of the vortex cavity to do high-speed whirling motion together with the vortex, negative pressure is generated at the center of the vortex cavity, a workpiece is sucked in a non-contact mode through the action of pressure difference between the upper surface and the lower surface of the workpiece, and then the vortex is discharged from the gap between the device and the workpiece. On the other hand, after entering from the first air inlet 6, the compressed air flows to the first annular gap 16, and is ejected by the first tangential nozzle 9, and then rotates at a high speed in the external rotation cavity, because the rotation direction of the tangential nozzle of the external rotation cavity is opposite to that of the tangential nozzle of the internal rotation cavity, the directions of friction torque generated by the external rotation flow and the internal rotation flow on the workpiece are opposite, different air supply pressures and flows of the internal rotation flow can generate different rotating torques on the workpiece, and through independent adjustment of the air supply pressure and the flow of the external rotation flow, the rotating torques generated by the internal rotation flow and the external rotation flow on the workpiece can be balanced, so that the rotation of the workpiece with a smaller size in the process of being sucked is inhibited, and the stability of non-contact.
Claims (5)
1. A concentric double-vortex non-contact vacuum suction device is characterized by comprising an upper end cover (1), a middle end cover (2) and a lower end cover (3); the upper end cover (1), the middle end cover (2) and the lower end cover (3) are fixedly connected with each other; the bottom of the lower end cover (3) is flush with the bottom of the middle end cover (2); the middle end cover (2) is arranged in the mounting cavity of the upper end cover (1); a first annular gap (16) is arranged between the outer circle of the middle end cover (2) and the inner circle of the upper end cover 1; the lower end cover (3) is arranged in the mounting cavity of the middle end cover (2); a second annular gap (14) is arranged between the excircle of the lower end cover (3) and the inner circle of the middle end cover (2); the middle end cover (2) is provided with a first cylindrical structure (2-1) and a second cylindrical structure (2-2); a first air inlet hole (6) and a second air inlet hole (7) are respectively arranged in the first cylindrical structure (2-1) and the second cylindrical structure (2-2); a plurality of first vent holes (5) are formed in the bottom of the first air inlet hole (6) at equal intervals along the radial direction of the middle end cover (2); the first vent hole (5) communicates the first air inlet hole (6) with the first annular gap (16); a circle of first rotational flow cavity (15) is arranged at the bottom of the middle end cover (2); a plurality of first tangential nozzles (9) are arranged between the first annular gap (16) and the first rotational flow cavity (15) at equal intervals, and the axial direction of each first tangential nozzle (9) is tangential to the outer wall surface of the first rotational flow cavity (15); the second air inlet holes (7) penetrate through the middle end cover (2) and enter the lower end cover (3), and a plurality of second air through holes (12) are formed in the bottom of the second air inlet holes (7) at equal intervals along the radial direction of the lower end cover (3); the second vent hole (12) communicates the second air inlet hole (7) with the second annular gap (14); a circle of second rotational flow cavity (13) is formed in the bottom surface of the lower end cover (3); a plurality of second tangential nozzles (11) are arranged between the second annular gap (14) and the second rotational flow cavity (11) at equal intervals; the axial direction of the second tangential nozzle (11) is tangent to the outer wall surface of the second rotational flow cavity (13); the direction of rotation of the first tangential nozzle 9 is opposite to the direction of rotation of the second tangential nozzle (11); the first rotational flow cavity (15) is coaxial with the second rotational flow cavity (13); the contact surface between the upper end cover (1) and the middle end cover (2) and the contact surface between the middle end cover (2) and the lower end cover (3) are sealed.
2. The concentric double-vortex non-contact vacuum suction device as claimed in claim 1, wherein the upper end of the middle end cover (2) is provided with a circle of sealing groove, and the lower end of the upper end cover (1) is provided with a circle of sealing groove; for sealing a first annular gap (16) between the upper end cover (1) and the middle end cover (2); the lower end of the middle end cover (2) is provided with a circle of sealing groove (10) which is used for sealing a second annular gap (14) between the middle end cover (2) and the lower end cover (3).
3. The concentric double-scroll non-contact vacuum suction device according to claim 1, wherein the inside of the second spiral chamber (13) is provided with a chamfer structure (3-1) so that the inside of the second spiral chamber (13) is in an open expanding structure downwards.
4. The concentric double-vortex non-contact vacuum suction device as claimed in claim 1, wherein a first step chamfer structure (2-3) and a second step chamfer structure (3-2) are respectively arranged on the outer sides of the first vortex cavity (15) and the second vortex cavity (13), so that the outer sides of the first vortex cavity (15) and the second vortex cavity (13) are both structures with downward opening expansion.
5. The concentric double scroll non-contact vacuum suction device according to claim 1, wherein the upper ends of the first and second air inlet holes (6, 7) are internally threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911417251.9A CN111268424B (en) | 2019-12-31 | 2019-12-31 | Concentric double-vortex non-contact vacuum suction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911417251.9A CN111268424B (en) | 2019-12-31 | 2019-12-31 | Concentric double-vortex non-contact vacuum suction device |
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| Publication Number | Publication Date |
|---|---|
| CN111268424A true CN111268424A (en) | 2020-06-12 |
| CN111268424B CN111268424B (en) | 2021-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911417251.9A Active CN111268424B (en) | 2019-12-31 | 2019-12-31 | Concentric double-vortex non-contact vacuum suction device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114524270A (en) * | 2022-02-24 | 2022-05-24 | 南京理工大学 | Single-inlet double-vortex non-contact vacuum sucker with needle valve |
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| CN110525973A (en) * | 2019-08-20 | 2019-12-03 | 南京理工大学 | A kind of block form binary vortices Non-contact vacuum sucker inhibiting workpiece rotation |
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2019
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| JP2008007319A (en) * | 2006-06-30 | 2008-01-17 | Myotoku Ltd | Floating conveying unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114524270A (en) * | 2022-02-24 | 2022-05-24 | 南京理工大学 | Single-inlet double-vortex non-contact vacuum sucker with needle valve |
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| CN111268424B (en) | 2021-04-16 |
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