KR102300564B1 - Vacuum ejector formed by 3d printing additive manufacturing technique - Google Patents

Abstract

In accordance with an embodiment of the present invention, a vacuum ejector comprises: an inlet port formed in a first side of a body; an outlet port formed in a second side of the body; and at least one suction port formed in a third side of the body. The interior of the body includes: a gas passage having an inflow passage through which the gas introduced from the inlet port moves, a nozzle connected to the inflow passage, and a gas passage including a diffuser for receiving the gas from the nozzle; and a vacuum forming line having a vacuum forming passage communicating with one side of the gas passage through at least one suction passage through which the gas suctioned from the at least one suction port passes. The vacuum ejector is formed by a 3D printing layered manufacturing technique. In the gas passage, the outer circumferential surface of the inflow passage and one end of the diffuser are connected to each other by a plurality of ribs. Therefore, productivity can be significantly improved.

Description

VACUUM EJECTOR FORMED BY 3D PRINTING ADDITIVE MANUFACTURING TECHNIQUE

The present invention relates to a vacuum ejector formed by 3D printing additive manufacturing techniques.

A vacuum ejector is a device (a device that forms a vacuum in an object by applying Bernoulli's theorem) to the suction port as the gas introduced through the inlet port is discharged through the discharge port. is a device that

The vacuum ejector is inevitably composed of a complicated line through which the gas (compressed air) flows inside the main body.

In addition, the conventional vacuum ejector is manufactured by cutting and bonding between parts, and there is a problem in durability, which is easily damaged by external impact with plastic material (ABS).

A vacuum ejector capable of overcoming the durability problem of the conventional vacuum ejector, reducing the weight of the product, and integrating the parts to improve and improve productivity is required, but it has not been specifically proposed yet.

Korea Registered Utility Model No. 20-0261384

Korean Patent Registration No. 10-1351768

The technical problem to be achieved in the present invention is to provide a vacuum ejector formed by 3D printing additive manufacturing technique.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be able

In order to achieve the above technical problem, a vacuum ejector according to a first embodiment of the present invention includes a main body; an inlet port formed on one side of the main body; a suction port formed on the other side of the main body on the same axis as the inlet port; and a plurality of discharge ports formed around the suction port on the other side of the main body, wherein the inside of the main body includes an inflow passage through which the gas introduced from the inlet port moves, a nozzle connected to the inflow passage, and a nozzle connected to the inlet. A gas passage comprising a gas passage including a diffuser supplied with gas, a first branch formed on the other side of the gas passage, and a plurality of branch passages that are in communication with the first branch and are respectively connected to the plurality of discharge ports line; and a second branch formed on one side of the suction port, a plurality of second branches communicating with the second branch, and a vacuum forming furnace communicating with each of the plurality of second branches and communicating with one side of the gas passageway and a vacuum forming line provided with, wherein the vacuum ejector is formed by a 3D printing additive manufacturing technique, and in the gas flow path, an outer circumferential surface of the inflow path and one end of the diffuser are connected by a plurality of ribs.

In the vacuum ejector, the nozzle is provided with a vortex member for enhancing the straightness of the gas flowing into the nozzle. In the vacuum ejector, the vacuum forming path communicates with the gas flow path on the side where the nozzle is located, and a plurality of protrusion-shaped backflow prevention parts are added on the outer peripheral surface of the diffuser in the vicinity of the vacuum forming path and the gas flow path are in communication. be prepared

In order to achieve the above technical problem, a vacuum ejector according to a second embodiment of the present invention includes a main body; an inlet port formed on the first side of the body part; a discharge port formed on the second side of the main body; and at least one suction port formed on a third side of the main body, wherein the inside of the main body includes an inflow passage through which the gas introduced from the inlet port moves, a nozzle connected to the inflow passage, and the gas from the nozzle. a gas flow line provided with a gas flow path including a supplied diffuser; and a vacuum forming line in which the at least one suction port is provided with a vacuum forming path communicating with one side of the gas moving path through at least one suction path through which the sucked gas passes, wherein the vacuum ejector is 3D printing additive manufacturing In the gas flow path, the outer circumferential surface of the inflow path and one end of the diffuser are connected to each other by a plurality of ribs.

Each of the outer peripheral surfaces of the at least one suction passage is connected to the side surface of the first side by a plurality of ribs. When there are a plurality of suction ports, a plurality of ribs are connected between the outer peripheral surfaces of each suction passage connected to the plurality of suction ports.

In the vacuum ejector, the nozzle may include a vortex member for enhancing the straightness of the gas flowing into the nozzle. The vacuum ejector may further include a plurality of protrusion-shaped backflow prevention units on an outer circumferential surface of the diffuser in the vicinity of which the vacuum forming path and the gas flow path communicate.

The vacuum ejector according to an embodiment of the present invention is formed by a metal 3D printing additive manufacturing technique, so that the durability of the vacuum ejector is strong, and the productivity is significantly improved by reducing the number of parts and reducing the weight of the product.

The vacuum ejector according to an embodiment of the present invention is provided to enhance the straightness of the introduced compressed air and prevent backflow, thereby improving the performance of the vacuum ejector.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included as a part of the detailed description to help the understanding of the present invention, provide embodiments of the present invention, and together with the detailed description, explain the technical spirit of the present invention.
1 is an exemplary diagram for explaining the principle of a vacuum ejector.
2 is a view showing a vacuum ejector (E) according to the first embodiment of the present invention.
3 is a view showing only the shape of the line by projecting the main body 10 in order to express the line formed inside the main body 10 of the vacuum ejector E according to the first embodiment of the present invention.
4 is a view for explaining a line (a passage through which gas passes) formed in the main body 10 of the vacuum ejector according to the first embodiment of the present invention.
5 illustrates a cross-sectional view of the inside of the main body 10 of the vacuum ejector according to the first embodiment of the present invention projected.
6 is a view showing a vacuum ejector (E) according to a second embodiment of the present invention.
7 shows a 3D view in which the inside is projected from one side of the main body 10 , and FIG. 7 is a 3D view in which the inside is projected from the other side of the main body 10 .
8 is a 3D view viewed from the other side to specifically show the ribs 41, 42, and 43 inside the main body 10 of the vacuum ejector according to the second embodiment.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION The detailed description set forth below in conjunction with the appended drawings is intended to describe exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention may be practiced. The following detailed description includes specific details in order to provide a thorough understanding of the present invention. However, it will be apparent to one skilled in the art that the present invention may be practiced without these specific details.

In some cases, well-known structures and devices may be omitted or shown in block diagram form focusing on core functions of each structure and device in order to avoid obscuring the concept of the present invention. In addition, the same reference numerals are used to describe the same components throughout the present specification.

The objects, specific advantages and novel features of one embodiment of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In addition, terms such as "one side", "other side", "one side", "other side", "first", "second" are used to distinguish one component from another component, and the component is It is not limited by terms. Hereinafter, in describing an embodiment of the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the gist of an embodiment of the present invention will be omitted.

The terminology used herein is only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as comprises or consists of are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

In the vacuum ejector, the line through which the gas (compressed air) flows inside the main body is inevitably configured in a complicated manner. Accordingly, in the present invention, a vacuum ejector is manufactured using a 3D printer method. In particular, the present invention uses a metal 3D printing additive manufacturing (DfAM) technique to supplement the problems of the existing vacuum ejector. The present invention intends to propose a vacuum ejector that can be mass-produced with a process design technology that combines metal 3D printing and manufacturing methods (CNC machining, wire cutting) to manufacture a vacuum ejector by metal 3D printing.

Hereinafter, an additive manufacturing design technique will be briefly reviewed.

Additive Manufacturing (Machining) Design (DfAM)

DfAM (Design for Additive Manufacturing) is a design concept for maximizing the advantages of 3D printing and is a design for additive manufacturing. Existing cutting processing, which is made by cutting iron, has severe limitations in shape, and it is impossible to produce complex drawings. There are various cutting methods such as 4-axis and 5-axis, but there is a limit to the production of complex and precise parts due to the nature of the cutting tool that cuts iron while rotating at high speed. Additive manufacturing has the advantage of not having to worry about impossible parts when designing because there are no restrictions on the shape as long as there is a supporter because additive manufacturing creates a shape by stacking materials in contrast to cutting processing.

The main purpose of 3D printing is optimized for prototyping and customized multi-variety production, which is necessary to create products that cannot be manufactured using conventional production methods and special fields such as high value-added industries such as medical, aviation, automobile, mold, and material fields. At this time, DfAM technology use the In this way, by using the additive manufacturing method, not only can various materials be added at the same time, but even complex shapes can be created regardless of location or direction (of course, the type of material adopted and the shape implemented depending on the method of use can be created. restrictions exist). In short, DFAM is a way to make the most of the advantages of 3D printing technology to manufacture products or systems.

3D printing is a 3D printing technology that 1) realizes ultra-light and high-rigidity structure through optimal design, 2) produces 'one-stop' production of complex products, and 3) enables simultaneous application of composite materials. It is leading the production and application of innovative design methods.

By using DfAM technology, a vacuum ejector module with complex functions or shapes can be made integrally without a separate assembly process. Not only can complex parts be integrated into design and production, but also the burden on the process can be greatly reduced.

The value/benefit of design using metal 3D printing (DfAM) technology is as follows.

ⅰ) Product weight can be reduced by reducing the number of parts from 8 to 1

ii) No consumable parts such as O-rings

iii) Improved durability and reliability with metal material

iv) Reduced A/S cost as parts that were damaged 1-2 times a year on average.

1 is an exemplary diagram for explaining the principle of a vacuum ejector.

Referring to FIG. 1 , compressed air (or gas) flows into the inlet port 11 and communicates with the nozzle 16 . When the high-pressure gas introduced into the suction port 14 passes through the nozzle 16 , passes through the diffuser 18 and exits to the discharge port 12 , the surrounding air is sucked and transported together according to Bernoulli's principle. The vacuum ejector (E) is a device that sucks and transfers the suction fluid by using the pressure energy of the high-pressure fluid. The vacuum ejector (E) is a device that can create a vacuum only with pneumatic pressure. When pneumatic (compressed air) flows into the inlet port 12, a vacuum is applied, and when a suction plate is placed on this part, the object can be adsorbed and transferred.

2 is a view showing a vacuum ejector (E) according to the first embodiment of the present invention.

The vacuum ejector (E) is a device that generates a negative pressure in the suction port 14 while the gas introduced through the inlet port 11 is discharged through the discharge port 12, and forms a vacuum in the object by applying the Bernoulli theorem. As a device, in particular, it is a device that makes it possible to create a vacuum only with pneumatics.

As shown in Figure 2, the vacuum ejector (E) is made of a main body portion 10, the main body portion 10 is provided with an inlet port 11, an outlet port 12, and a suction port 14 on both sides of the and the inlet port 11 and the suction port 14 are formed on the same axis on both sides of the main body 10, respectively. A plurality of discharge ports 12 are provided around the suction ports 14 . Coaxial line in the present specification means that the center of the inlet port 11 and the center of the suction port 14 are at the same position when the side of the main body 10 is viewed from the front, more preferably It is preferable that the inlet port 11, the suction port 14, and the side surfaces of the main body portion 10 have the same center.

In order to miniaturize the main body 10 of the vacuum ejector E according to the first embodiment of the present invention, the suction port 14 and the inlet port 11 are formed on the same axis on both sides of the main body 10, In order to provide the discharge port 12 around the suction port 14, the line through which the internal gas flows is inevitably configured to be complicated, and the problem that it is difficult to manufacture it is solved by using a 3D printer method. As such, the vacuum ejector (E) according to FIG. 2 is formed of an integral body portion 10 by a metal 3D printing additive manufacturing technique.

3 is a view showing only the shape of the line by projecting the main body 10 in order to express the line formed inside the main body 10 of the vacuum ejector E according to the first embodiment of the present invention.

As shown in the drawings, the main body 10 may be formed of a cylindrical member, or may be formed in the shape of a polyhedron having a predetermined length in one direction, which should not be interpreted as limiting the scope of rights.

An inlet port 11 is formed on one side of the main body 10, and a first screw thread 111 is formed on the inner circumferential surface of the inlet port 11, so that the pump D for supplying gas is screwed. It is made to be possible, but it is also possible to further provide a detachable block unit 70 to be described later to enable one-touch coupling, which will be described in more detail below.

A suction port 14 is formed on the other side of the main body 10 at a position coaxial with the inlet port 11 , and the suction port 14 has an inner circumferential surface similar to the inlet port 11 . It is preferable that a second screw thread 141 is formed on the ridge so that a member or a suction plate to form a vacuum can be fastened.

Coaxial line in the present specification means that the center of the inlet port 11 and the center of the suction port 14 are at the same position when the side of the main body 10 is viewed from the front, more preferably It is preferable that the inlet port 11, the suction port 14, and the side surfaces of the main body 10 are formed at the same center of each other.

Referring to FIG. 3 , the inlet port 11 formed on one side of the main body 10 is formed, and the suction port 14 is formed on the other side of the main body 10 on the same axis as the inlet port 11 . and a plurality of discharge ports 12 formed around the suction port 14 on the other side of the main body 10 are formed. The discharge port 12 is formed on the other side of the main body 10, and may be formed in various shapes such as a circle, a square, and the like. In addition, a silencer 40 is provided in each discharge port 12 to prevent noise from occurring when the gas is discharged.

The interior of the main body 10 is a gas movement including an inflow passage through which the gas introduced from the inlet port moves, a nozzle (not shown) connected to the inflow passage, and a diffuser (not shown) receiving compressed air (gas) from the nozzle. The furnace 22, the first branching portion 24 formed on the other side of the gas passage 22, and a plurality of branch passages 25 communicating with the first branching portion 24 and respectively connected to the plurality of discharge ports 12 ) is provided with a gas transfer line 20 made of.

In addition, in the interior of the main body 10, a second branch portion 34 formed on one side of the suction port 14, a plurality of second branch passages 35 communicating with the second branch portion 34, a plurality of A vacuum forming line 30 is provided in communication with each of the second branches 35 and consisting of a vacuum forming path 32 communicating with one side of the gas moving path 22 . The vacuum forming path 32 refers to a flow path in which a vacuum is formed while passing through the suction flow path by sucking gas from the suction port 14 .

Inside the body portion 10, the nozzle is manufactured by laminating to include a vortex member for enhancing the straightness of the compressed air flowing into the nozzle. In order to improve the straightness (or straightness) of the introduced compressed air by forcibly swirling the air in the outermost part when the compressed air passes through the nozzle and enclosing the air passing through the center, the nozzle may have a vortex member. .

In addition, the plurality of second branch passages 35 communicate with the gas passage 22 on the side where the nozzle is located, and in the vicinity where the plurality of second branch passages 35 and the gas passage 22 communicate with each other, the diffuser A plurality of protrusion-shaped inner walls are further provided on the outer circumferential surface. The plurality of protrusion-shaped inner walls do not flow backward when the compressed air passed from the nozzle hits the inner wall of the diffuser when it whirls, or when the intake air enters the plurality of second branch passages 35, respectively, but does not flow back through the diffuser. 22) serves as a backflow prevention unit to pass through.

4 is a view for explaining a line (a passage through which gas passes) formed in the body portion 10 of the vacuum ejector according to the first embodiment of the present invention.

A gas transfer line 20 connecting the inlet port 11 and the outlet port 12 is formed inside the main body 10, and a vacuum forming line 30 that forms a vacuum and is connected to the suction port 14 is formed. have.

Described sequentially in the direction in which the gas (compressed air) flows in and out, first, the inlet port 11 is formed on one surface (or one side) of the main body 10 , and the end of the inlet port 11, that is, A gas passage 22 is communicated to the other side.

More specifically, a width reduction passage 21 is formed on the other side of the inlet port 11 to increase the speed of the inflowing gas and lower the pressure to pass through the gas movement passage 22, and the width reduction passage 21 ), when the gas is introduced into the gas passage 22, a suction power capable of sucking the air of the vacuum forming furnace, which will be described later, is secured.

As described above, the gas introduced into the gas passage 22 is discharged through the discharge port 12. At this time, as a plurality of discharge ports 12 are provided around the suction port 14, the first The gas is branched into a plurality of curved first branch passages 25 through the branch portion 24 . At this time, each of the first branch passages 25 is configured to communicate with each discharge port 12 .

As shown in FIG. 4 , the first branch unit 24 may branch gas into four first branch passages 25 , and thus four discharge ports 12 may be provided. The reason for branching the gas is to increase the amount of gas to be discharged so that the gas is discharged at a high speed.

Also, the gas passage 22 is formed in the longitudinal direction of the body 10 on the same axis as the inlet port 11 and the outlet port 12 . When describing the vacuum forming line 30 based on the direction in which air is sucked, a second branch portion 34 is formed on one side of the suction port 14, and the second branch portion 34 has a plurality of curved shapes. It is connected to the second branch passage 35 of the, and the second branch passage 35 has a structure in communication with the vacuum forming furnace (32).

At this time, it is preferable that the second branch part 34 also branch into four second branch passages 35 , and thus the vacuum forming furnace 32 may also be formed of four.

The reason for branching by the second branching part 34 is that the suction power is higher when the suction power is transmitted to one suction port 14 through a plurality of pipes rather than suction from a single pipe. In addition, the second branch passage 35 and the first branch passage 25 are formed to be arranged at positions shifted from each other to prevent interference between the pipelines, and the first branch passage 25 and the second branch passage 25 are As four furnaces 35 are provided, it is possible to cross-arrange with each other. That is, one second branch passage 35 is arranged between the plurality of first branch passages 25 , respectively.

That is, when using the actual injection molding or assembly method, this configuration is difficult to manufacture as each conduit is cross-arranged with each other with the fear of gas leaking. There are advantages to being able to do this.

The second branch path 35 is provided to communicate with the vacuum forming path 32 , and the vacuum forming path 32 is parallel to the gas moving path 22 in the longitudinal direction of the body 10 . It is formed up to the inlet port (11).

The vacuum forming furnace 32 is in communication with the gas moving path 22, and a vacuum must be formed by the pressure difference generated when the gas moves, and accordingly, one side of the gas moving path 22 communicates with the vacuum forming furnace 32 It is characterized in that the communication path 221 is further provided in which the communication hole 223 is formed.

More specifically, the communication path 221 is provided in a shape in which the diameter spreads radially from one side of the gas flow path 22 , and is formed in a double tube type around the width reduction path 21 .

In addition, the communication passage 221 is provided on one side of the boundary between the width reduction passage 21 and the gas movement passage 22, which is located at the rear with respect to the movement direction of the gas. Accordingly, the air in the vacuum forming furnace 32 is sucked and moved together with the gas through the communication hole 223 , and accordingly, the suction force is transmitted to the suction port 14 .

Furthermore, as the air of the vacuum forming path 32 can be introduced from the diagonal rearward from the direction in which it flows into the gas passage 22 through the width reduction passage 21, the inflow gas flows back into the communication passage 221 . It also has the effect of preventing it from happening.

Again, the discharge port 12 is a place where the introduced gas is discharged, and noise may occur when the gas at a high speed is discharged, and a separate silencer 40 is further provided to solve this problem.

More specifically, the silencer 40 can be mounted as a separate member, but the present invention can manufacture the silencer 40 using a 3D printer.

5 illustrates a cross-sectional view of the inside of the main body 10 of the vacuum ejector according to the first embodiment of the present invention projected.

Referring to FIG. 5 , the interior of the main body 10 includes an inflow passage through which the compressed air introduced from the inlet port 11 moves, a nozzle connected to the inflow passage, and a diffuser receiving compressed air from the nozzle. The furnace 22, the first branch 24 formed on the other side of the gas passage 22, and the gas transfer line 20 communicated with the first branch 24 and provided with a plurality of discharge ports 12 This is provided. In FIG. 5, arrows other than arrows indicating each component indicate the direction of movement of the aircraft.

In addition, the second branch portion 34 (not shown) formed on one side of the suction port 14 in the inside of the body portion 10 is made of a vacuum forming passage 32 communicating with one side of the gas passage passage 22 . A vacuum forming line 30 is provided. The vacuum forming path 32 refers to a flow path in which a vacuum is formed while passing through the suction flow path by sucking gas from the suction port 14 .

The inside of the main body 10 is manufactured by laminating to include a vortex member 48 for enhancing the straightness of the compressed air flowing into the nozzle when the compressed air (gas) introduced into the inlet port 11 passes through the nozzle. . When compressed air passes through the nozzle, the nozzle is provided with a vortex member (48) to forcibly swirl the air in the outermost part and wrap the air passing through the center to improve the straightness (or straightness) of the introduced compressed air. can do.

In addition, the vacuum forming path 32 (or the suction flow path) further includes a plurality of protrusion-shaped inner walls 49 on the outer peripheral surface of the diffuser in the vicinity of the gas flow path 22 is communicated. The plurality of protrusion-shaped inner walls do not flow backwards when the compressed air passing from the nozzles comes in a whirlwind (indicated by a curved arrow in Fig. 6) or when the suction air enters the vacuum forming furnace (or suction passage) when it hits the inner wall of the diffuser. It passes through the diffuser to the gas flow path 22 and serves as a backflow prevention unit to be discharged to the discharge port 12 . Accordingly, the plurality of protrusion-shaped inner walls may be referred to as a backflow prevention part 49 . The plurality of protrusion-shaped backflow prevention units 49 temporarily trap the vortex of the compressed air that has passed through the nozzles so that they are discharged through the diffuser together with the air sucked through the vacuum forming path 32 (or suction path). Prevents backflow and improves the performance of the vacuum ejector.

6 is a view showing a vacuum ejector (E) according to a second embodiment of the present invention.

Referring to FIG. 6 , the vacuum ejector E includes an inlet port 11 , a suction port 14 , and an exhaust port 12 . The vacuum ejector according to the second embodiment of the present invention includes at least one suction port 14 . In Figure 6, as an example, it has been illustrated as having four suction ports (14). Unlike the vacuum ejector according to the first embodiment, in the vacuum ejector according to the second embodiment, the inlet port 11 and the suction port 14 are not formed on the same axis, and the suction port 14 is the inlet port 11 . may be formed in the vertical direction of

An inlet passage (not shown) through which compressed air is introduced from the inlet port 11 and passes through, and a suction passage (not shown) through which the air sucked from the suction port 11 passes is provided in the body portion 10 .

7 and 8 each illustrate a 3D view in which the body part 10 is projected to represent a line formed inside the body part 10 of the vacuum ejector E according to the second embodiment of the present invention. .

7 shows a 3D view in which the inside is projected from one side of the main body 10 , and FIG. 7 is a 3D view in which the inside is projected from the other side of the main body 10 .

6 and 7 , the vacuum ejector according to the second embodiment includes a body portion 10 , an inlet port 11 , a suction port 14 , and an exhaust port 12 . The inlet port 11 is formed on the first side of the body portion 10, and the discharge port 12 is formed on the second side (eg, opposite to the first side) direction of the body portion 10, The suction port 12 is formed in the third side (eg, the side corresponding to the first side and perpendicular to the side) of the main body portion 10, at least one is formed. That is, it can be said that the inlet port 11 and the outlet port 12 are located on the same axis. 6 and 7, it is illustrated that four suction ports 12 are provided.

The inside of the main body 10 supplies compressed air from the inlet passage 44 through which the compressed air introduced from the inlet port 11 moves, the nozzle 16 connected to the inlet passage (not shown), and the nozzle 16 . A gas transfer line 20 (not shown) comprising a gas transfer path 22 (not shown) including a receiving diffuser 18 is provided. In addition, the inside of the main body 10, at least one suction passage 45 through which the gas sucked from the at least one suction port 14 passes is in communication with one side of the gas passage 22 and a vacuum forming passage 32 ) (not shown) is provided with a vacuum forming line (not shown).

The vacuum ejector according to the second embodiment is formed by 3D printing additive manufacturing technique, and the outer peripheral surface of the inflow passage 44 in the gas passage 22 and one end of the diffuser 18 are connected by a plurality of ribs 41 is formed Preferably, one end of the diffuser 18 and the outer peripheral surface of the width reducing passage 21, the width of which is also reduced on the outer peripheral surface of the inflow passage 44, may be connected by a plurality of ribs (41).

In order to continuously form a structure for the 3D printing additive manufacturing technique, the outer peripheral surface 44 of the inflow passage and one end of the diffuser 18 must be connected with a plurality of ribs 41, and the strength of the additively manufactured vacuum ejector is increased give. In addition, it may be desirable to be connected with a thin rib in order to reduce the weight of the product.

In addition, each of the outer circumferential surfaces of the at least one suction passage 45 is provided in connection with a side surface on which the inlet port 11 is formed inside the main body 10 and a plurality of ribs 42 . The plurality of ribs 42 further enhance the strength of the vacuum ejector as a continuous structure for 3D printing additive manufacturing. In order to reduce the weight of the product, it is preferable that the plurality of ribs 42 are formed of thin ribs.

As shown in FIG. 7 , when a plurality of suction ports 14 are formed, a plurality of ribs 43 are connected between the outer peripheral surfaces of each suction passage 45 connected to the plurality of suction ports 14 . . Similarly, the plurality of ribs 42 formed between the outer circumferential surfaces of each of the suction passages 45 increase the strength of the vacuum ejector as a continuous structure for 3D printing additive manufacturing. In order to reduce the weight of the product, it is preferable that the plurality of ribs 43 are formed of thin ribs.

The nozzle 16 may include a vortex member 48 for enhancing the straightness of the compressed air flowing into the nozzle 16 . At least one suction flow path 45 communicates with the gas flow path 22 on the side where the nozzle 16 is located, and a diffuser ( 18) may further include a plurality of protrusion-shaped backflow prevention portions 49 on the outer circumferential surface.

8 is a 3D view viewed from the other side to specifically show the ribs 41, 42, and 43 inside the main body 10 of the vacuum ejector according to the second embodiment.

Referring to FIG. 8 , the inside of the main body 10 includes an inflow passage 44 through which the compressed air introduced from the inlet port 11 moves, a nozzle 16 connected to the inflow passage (not shown), and a nozzle 16 . ) is provided with a gas transfer line 20 (not shown) including a diffuser 18 receiving compressed air from the gas transfer path 22 (not shown). In addition, the inside of the main body 10, at least one suction passage 45 through which the gas sucked from the at least one suction port 14 passes is in communication with one side of the gas passage 22 and a vacuum forming passage 32 ) (not shown) is provided with a vacuum forming line (not shown).

The vacuum ejector according to the second embodiment is formed by 3D printing additive manufacturing technique, and the outer peripheral surface of the inflow passage 44 in the gas passage 22 and one end of the diffuser 18 are connected by a plurality of ribs 41. is formed Preferably, one end of the diffuser 18 and the outer peripheral surface of the width reducing passage 21, the width of which is also reduced on the outer peripheral surface of the inflow passage 44, may be connected by a plurality of ribs (41).

In order to continuously form a structure for the 3D printing additive manufacturing technique, the outer circumferential surface of the inflow passage 44 and one end of the diffuser 18 must be connected with a plurality of ribs 41, and the strength of the vacuum ejector manufactured by the additive manufacturing process is increased. elevate it In addition, it may be desirable to be connected with a thin rib in order to reduce the weight of the product.

As described above, in the present invention, in forming the lines for vacuum forming inside the body portion 10, manufacturing convenience is increased by using a 3D printer as an integral part, and complex lines can be easily formed inside the body. A vacuum ejector with Furthermore, by further providing a silencer in the exhaust port, it is possible to suppress the generation of noise when gas is discharged, and to improve manufacturing convenience by configuring the silencer to be integrally molded with a 3D printer.

In the vacuum ejector according to the first embodiment of the present invention, in order to form the inlet port 11 and the suction port 14 on the same axis, each line must be formed at a position displaced from each other inside the body, and it is physically molded Although it is difficult to manufacture it through a 3D printer, it has become possible to manufacture it easily by using a 3D printer. The vacuum ejector is further provided with a silencer, and the silencer is also made to be manufactured by a 3D printer, and it is possible to prevent noise from occurring when gas is discharged by the silencer.

The vacuum ejector according to the first and second embodiments of the present invention further increases the strength of the vacuum ejector, improves productivity by reducing the weight of the product, and improves the performance of the vacuum ejector by strengthening the straightness of the introduced gas and preventing backflow.

The embodiments described above are those in which elements and features of the present invention are combined in a predetermined form. Each component or feature should be considered optional unless explicitly stated otherwise. Each component or feature may be implemented in a form that is not combined with other components or features. It is also possible to configure embodiments of the present invention by combining some elements and/or features. The order of operations described in the embodiments of the present invention may be changed. Some features or features of one embodiment may be included in another embodiment, or may be replaced with corresponding features or features of another embodiment. It is obvious that claims that are not explicitly cited in the claims can be combined to form an embodiment or included as a new claim by amendment after filing.

It is apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the essential characteristics of the present invention. Accordingly, the above detailed description should not be construed as restrictive in all respects but as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

E: vacuum ejector
10: body 11: inlet port
111: first thread 12: discharge port
14: suction port 141: second thread
16: nozzle 18: diffuser
20: gas movement line 21: width reduction
22: gas transfer path 221: communication path
223: communication hole 24: first branch part
25: first branch furnace 30: vacuum forming line
34: second branch 35: second branch
32: vacuum forming furnace 40: silencer
41: rib 42: rib
43: rib 44: inflow passage
45: suction flow path 70: detachable block unit

Claims (8)

In the vacuum ejector,
body part;
an inlet port formed on one side of the main body;
a suction port formed on the same axis as the inlet port on the other side of the main body so that the center is at the same position as the center of the inlet port when the other side of the main body is viewed from one side of the main body from the front; and
A plurality of discharge ports formed in a direction surrounding the outer peripheral surface of the suction port from the other side of the body part,
The body portion, the inlet port, the suction port and the plurality of outlet ports are integrally formed by 3D printing additive manufacturing technique,
The inside of the body part,
an inflow passage through which the gas introduced from the inlet port moves, a gas passage including a nozzle connected to the inflow passage, and a diffuser receiving the gas from the nozzle, a first branch formed on the other side of the gas passage, the a gas transfer line communicating with the first branch and having a plurality of first branch passages respectively connected to the plurality of discharge ports; and
A second branch formed at one side of the suction port, a plurality of second branches communicating with the second branch, and a vacuum forming path communicating with each of the plurality of second branches and communicating with one side of the gas passage A vacuum ejector comprising a vacuum forming line provided. The method of claim 1,
The nozzle is provided with a vortex member for enhancing the straightness of the gas flowing into the nozzle, a vacuum ejector. 3. The method of claim 2,
The vacuum forming path communicates with the gas flow path on the side where the nozzle is located,
A vacuum ejector further comprising a plurality of protrusion-shaped backflow prevention units on an outer peripheral surface of the diffuser at a position near where the vacuum forming path and the gas flow path start to communicate. delete The method of claim 1,
The plurality of discharge ports are provided in four, a vacuum ejector. The method of claim 1,
The plurality of discharge ports are each formed in a circular shape, a vacuum ejector. delete delete

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