KR20180044516A - Impeller - Google Patents

Abstract

The present invention relates to an impeller. According to an embodiment of the present invention, the impeller comprises a hollow shaft (105), an inlet unit (110), a blade (120), a disk (140), and a discharge unit (150). According to the present invention, the impeller can increase stirring efficiency and can improve durability.

Description

Impeller {Impeller}

The present invention relates to an impeller, and more particularly, to an impeller capable of being driven with less power (1) when a blade rotates, (2) an impeller capable of being broken easily by a micro- .

Generally, an agitator means a device for mixing liquid and liquid, liquid and solid or powder, etc., and is a device widely used in the case where objects are mixed such as a chemical process or a wastewater treatment process.

Depending on the type of agitation, it is divided into a tank agitator and a liquid type agitator, and most of them are tank agitators at present.

The structure of the tank stirrer is a device in which a device for stirring is put in the tank, and it is classified into various types such as a propeller type, an ore type, a turbine type, and a spiral type, depending on the type of stirring blades.

(1) The propeller-type stirrer is also used for liquid stirring or liquid containing solid particles with low viscosity, (2) Oar stirrer is used for low viscosity and has the simplest structure.

(3) Turbine type stirrer is very efficient, using centrifugal force. (4) Spiral type stirrer is used for stirring of highly viscous object.

Such an agitator is essentially used with an impeller comprising a blade for mixing liquid and liquid, liquid and solid or powder, and the like.

On the other hand, a stirrer is used in the aeration apparatus or the coagulation apparatus of the wastewater purification treatment facility to perform an agitation process for inducing an active reaction between oxygen or the coagulant and the wastewater to be treated.

The prior art related to the stirrer is as follows.

First, a Korean Registered Utility Model No. 447,286 (hereinafter referred to as "Prior Art 1") is used to generate turbulence in the object to be stirred to generate fluid flow on the upper and lower surfaces of the impeller, A stirrer has been disclosed.

The stirrer disclosed in Prior Art 1 includes a motor for providing a rotational force; A shaft mounted on the motor and having a hollow portion formed therein; An impeller fixed to a lower end of the shaft, rotated by the rotational force, formed with a plurality of through holes through which fluids can pass, and having a generally conical shape; And a rib vertically protruding from the upper surface of the impeller toward the shaft.

In this prior art 1, an air injection device for injecting air into the liquid is added.

That is, the air injection device added in the prior art 1 has a disadvantage of supplying compressed air to the hollow portion of the shaft, including a compressor that generates compressed air to generate air pressure.

In order to overcome the disadvantage of the prior art 1, Japanese Patent No. 4,039,430 (hereinafter referred to as "Prior Art 2") draws gas from the outside by negative pressure (negative pressure) generated in a vane wheel rotating below the liquid level, And an impeller (bladed wheel) of an agitating self-priming aerating type aeration / agitation device is disclosed.

In the prior art 2, on the sides parallel to the hollow shaft of the air bladder, a plurality of gas discharge openings on the other radiation surface from the hollow shaft, and an end near the hollow shaft of each of the gas discharge openings, Wherein a swirling vane is formed on the hollow shaft of the gas discharge port in the vicinity of the reverse direction in the rotating direction of the vehicle and extends through a distal end to form an outer swelled curved surface, Is covered with a flat plate perpendicular to the hollow shaft.

In the case of the prior art 2, the air above the liquid surface is guided into the liquid by the negative pressure (negative pressure) generated in the hollow wing car attached to the rotating hollow shaft, without using an air pump, The structure is simplified and the manufacturing cost is reduced. Thus, the disadvantages of the prior art 1 are largely solved.

There is a need for a technology for separating air injected into a liquid as well as introducing the air above the liquid surface into the liquid by the negative pressure (negative pressure) generated in the hollow vane vehicle from the prior art 2, It has been raised.

According to this necessity, in Japanese Patent No. 3,919,262 (hereinafter referred to as " Prior Art 3 "), a pair of upper and lower blades are radially arranged around the rotating shaft, a gap is formed between the opposed surfaces of the pair of blades, Has been proposed to be narrowed toward the direction of rotation of the wing, or the gap is formed to widen toward the direction of rotation of the wing.

The stirring device to which the prior art 3 is applied has an advantage that the absorption efficiency of air (gas) is improved.

Korean Registered Utility Model No. 447,286 Japanese Patent No. 4,039,430 Japanese Patent No. 3,919,262

It is an object of the present invention to provide an impeller for guiding a gas discharged into a liquid into a finely divided form, that is, a micro bubble, as well as to induce a gas into a liquid with less power.

In order to achieve the above-mentioned object, an impeller according to claim 1 of the present invention includes a hollow shaft; An inlet formed on one side of the hollow shaft and positioned above the liquid surface; A blade located on the other side of the hollow shaft and including a vertical blade and an inclined blade located below the liquid surface; A blade coupled to an edge of one side of the blade and having an upper surface coupled with the hollow shaft; And a discharging portion located at a side of the hollow shaft, wherein the inclined wing is positioned between one vertical wing and another vertical wing adjacent to the vertical wing.

In order to achieve the above-mentioned object, the impeller of claim 2 of the present invention is characterized in that the discharge part includes a hollow member communicating with a side surface of the hollow shaft.

In order to achieve the above-mentioned object, the impeller according to claim 3 of the present invention is characterized in that the hollow member is disposed on the upper surface or the lower surface of the disk, and the opening of the hollow member is located on the rear surface of the vertical blade.

In order to achieve the above object, the impeller of claim 4 of the present invention is characterized in that the inclined wing includes a first inclined wing and a second inclined wing, wherein a gap is formed between the first inclined wing and the second inclined wing .

In order to achieve the above-mentioned object, the impeller according to claim 5 of the present invention is further characterized in that the disk has a through hole penetrating the upper surface and the lower surface of the disk.

In order to achieve the above-mentioned object, the impeller according to claim 6 of the present invention is characterized in that the through-hole is located between one vertical blade and another adjacent blade.

In order to achieve the above-mentioned object, the impeller according to claim 7 of the present invention includes a hollow shaft; An inlet formed on one side of the hollow shaft and positioned above the liquid surface; A blade located on the other side of the hollow shaft and including a vertical blade and an inclined blade located below the liquid surface; A blade coupled to an edge of one side of the blade and having an upper surface coupled with the hollow shaft; And a discharging portion communicating with the hollow shaft is formed on a side surface of the disk, wherein the oblique blade is located between one vertical blade and another adjacent vertical blade.

In order to achieve the above object, an impeller according to claim 8 of the present invention comprises: a hub; And a blade comprising a vertical blade and an inclined blade which are coupled to a side surface of the hub and located below the liquid surface, wherein the inclined blade is located between one vertical blade and another adjacent vertical blade do.

In order to achieve the above object, the impeller of claim 9 of the present invention is characterized in that the inclined wing includes a first inclined wing and a second inclined wing, wherein a gap is formed between the first inclined wing and the second inclined wing .

To achieve the above-mentioned object, an impeller according to claim 10 of the present invention comprises: a hub; And a vertical blade and a nozzle coupled to the side surface of the hub and positioned below the liquid surface, wherein an inlet of the nozzle is formed to have a larger cross-sectional area than an outlet of the nozzle, And is located between the vertical wings.

In order to achieve the above-mentioned object, an impeller according to an eleventh aspect of the present invention further includes a support portion between the nozzle and the side surface of the hub, wherein one end of the support portion is engaged with a side surface of the hub, And the like.

The impeller of the present invention has the following advantages.

(1) It is possible to introduce gas or gas into the liquid at a low rotation speed and high efficiency compared to the prior art.

(2) Since the inclined wing has a strong shear breaking action, the gas or gas coming out through the discharge portion can be finely crushed.

(3) When the impeller is agitated, a strong shear fracture action is generated due to a variation in the pressure gradient, so that the gas or gas which has been crushed through the inclined wing becomes microbubbed, and the stirring efficiency can be increased.

On the other hand, microbubbing of the gas or gas by the strong shear fracture action due to the gradient of the pressure gradient is also achieved by rotating the vertical vanes.

(4) Since the discharge portion is located on the rear surface of the blade, the resistance with the liquid generated in the stirring process does not greatly affect the discharge portion, so that the durability of the impeller including the discharge portion is improved.

(5) The gap formed in the inclined wing serves to partially reduce the resistance between the stirring object and the impeller in the stirring action, thereby improving the durability of the impeller.

1 is a cross-sectional view of an agitation apparatus to which an impeller of the present invention is applied
2 is a perspective view of the first embodiment of the present invention.
3 is a partial perspective view of a case where the oblique vane is deformed in the first embodiment of the present invention.
4 is a perspective view of a second embodiment of the present invention
5 is a perspective view of another embodiment of the second embodiment of the present invention.
6 is a cross-
7 is a perspective view of another embodiment of the second embodiment of the present invention.
8 is a perspective view of another embodiment of the second embodiment of the present invention.
Figure 9 is a cross-
10 is a partial perspective view of a third embodiment of the present invention
11 is a partial perspective view of a case where the oblique vane is deformed in the third embodiment of the present invention
Fig. 12 is a sectional view of the oblique vane of Fig. 11
13 is a perspective view of a fourth embodiment of the present invention
14 is a sectional view of Fig. 12
15 is a partial perspective view of a fifth embodiment of the present invention
16 is a perspective view showing a part of the oblique vane according to the fifth embodiment of the present invention,
17 is a perspective view showing a part of the oblique vane according to the fifth embodiment of the present invention,
18 is a cross-sectional view of the oblique vane of Fig. 17
19 is a partial perspective view of a sixth embodiment of the present invention
20 is a graph showing the power comparison graph of the prior art and the present invention
FIG. 21 is a graph showing the bubble size comparison graph of the prior art and the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

In the stirring apparatus 10 using the impeller 100 of the present invention, the motor 20, which is coupled to one end of the hollow shaft, is positioned on the upper portion of the impeller 100.

The stirring apparatus 10 includes a tank 30 for receiving an object (or liquid) to be stirred.

The impeller 100 is accommodated in the tank and a part of the impeller 100 is submerged below the surface of the stirring object while the rest of the impeller 100 is positioned above the surface of the stirring object. Lt; / RTI >

Hereinafter, the impeller 100 will be described in detail, and a description of the first embodiment of the present invention will be given below.

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The first embodiment will be described with reference to Fig. 2 and Fig.

First, the impeller 100 includes a hollow shaft 105.

One side 106 of the hollow shaft is provided with an inlet 110 and the inlet 110 is located above the liquid surface.

The inlet 110 communicates with the hollow shaft 105.

Accordingly, when the impeller 100 rotates, the air (air) on the liquid water surface is guided into the hollow shaft 105 through the inlet portion 110, and the induced air (air) is discharged through the discharge portion 150 Can be introduced into the liquid.

That is, the inflow section 110 may be referred to as a gas inflow section.

In the first embodiment of the present invention, the inlet 110 may include a hole 111 formed in the side surface 108 of the hollow shaft, and the number of the holes 111 may be increased or decreased.

The blade 120 is located on the other side 107 of the hollow shaft.

The blade 120 is located below the liquid surface and can stir the object to be stirred when the hollow shaft 105 rotates.

In the first embodiment, the blade 120 comprises a vertical wing 125 and an inclined wing 130 located below the liquid surface.

The structure in which the blade 120 is fixed to the impeller 100 is as follows.

That is, a disc 140 is placed between the blade 120 and the hollow shaft 105.

The upper surface 141 of the original plate is joined to the hollow shaft 105 by welding or the like.

Specifically, the other end 109 of the hollow shaft engages with the upper surface 141 of the disk.

The edge 145 of the disc engages one side 121 of the blade.

The coupling relationship between the disk 140, the blade 120, and the hollow shaft 105 is summarized as follows.

(1) One side 121 of the blade is fixed to the edge 145 of the disk by fitting or welding or the like. (2) The hollow shaft 105 is fixed to the upper surface 141 of the disk by a method such as welding The hollow shaft 105 and the circular plate 140 can be fixed to each other.

On the other hand, a discharge portion 150 formed on the side surface 108 of the hollow shaft is located below the liquid surface.

In the first embodiment, the discharge portion 150 refers to a hole 151 formed in the side surface 108 of the hollow shaft, and the position and the number of the hole 151 depend on the position of the vertical blades 125 to be described later.

Specifically, the hole 151 is located adjacent to the rear surface 126 of the vertical wing.

The shape of the inclined wings 130 can be deformed as shown in Fig.

That is, the gap 135 may not be formed between the first inclined wing 131 and the second inclined wing 132, and the end face of the inclined wing 130 may be formed to form a parabola.

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Hereinafter, the second embodiment of the impeller 200 of the present invention will be described.

The second embodiment will be described with reference to Figs. 4 to 9. Fig.

The discharging unit 250 may further include a hollow member 255 communicating with the side surface 208 of the hollow shaft.

That is, it further includes a hollow member 255 that communicates with the discharge hole 251 described above.

Specifically, one end 256 of the hollow member engages with the side surface 208 of the hollow shaft so as to communicate with the discharge portion hole 251.

The lower surface 258 of the hollow member is in contact with the upper surface 241 of the disk and fixed by welding or the like.

The hollow member 255 is disposed adjacent to the rear face 226 of the vertical wing.

The lower surface 258 of the hollow member 255 can be fixed to the upper surface 241 of the disk by welding or the like.

On the other hand, the side surface 259 of the hollow member contacts the rear surface 226 of the vertical blade and can be fixed to the vertical blade 25 by welding or the like.

The hollow member 255 may be disposed on the lower surface 242 of the disk as well as the upper surface 241 of the disk.

Will be described with reference to FIG. 5 and FIG.

Unlike the case where the hollow member 255 is disposed on the upper surface 241 of the circular plate, the hollow shaft 205 penetrates the circular plate 240.

More specifically, the other end 209 of the hollow shaft passes through the disk 240.

A hole 244 is formed in the circular plate 240 so that the other end 209 of the hollow shaft can pass through the circular plate 240.

The disk hole 244 is located at the center of the disk 240 and the other end 209 of the hollow shaft is partially projected downward from the lower surface 242 of the disk through the disk hole 244.

The hollow member 255 disposed on the lower surface 242 of the disk communicates with the side surface 208 of the hollow shaft.

Concretely, the hollow member 255 communicates with the side of the other end 209 of the hollow shaft projecting partly from the lower surface 242 of the disk through the disk hole 244.

A hole 210 is formed in a side of the other end 209 of the hollow shaft so that the side of the other end 209 of the hollow shaft communicates with the hollow member 255. The other end side hole 210 and the hollow 255 of the hollow shaft Communicate.

The structure in which the hollow member 255 disposed on the lower surface 242 of the disk is coupled to the disk 240 or the vertical blade 225 is the same as the structure in which the hollow member 255 is disposed on the upper surface 241 of the disk Therefore, a detailed description thereof will be omitted.

The air (air) is discharged into the liquid surface through the discharge hole 251.

Since the hollow member 255 is located on the rear face 226 of the vertical wing, the opening 257 of the hollow member is also located on the rear face 226 of the vertical wing.

As described above, since the opening 257 of the hollow member is located on the rear surface 226 of the vertical blade, it is possible to induce dispersion of the gas (air) on the liquid water surface into the liquid water surface by the following principle.

A negative pressure (negative pressure) is generated on the rear surface 226 of the vertical blade according to the rotation of the hollow shaft 205.

(1) The negative pressure (negative pressure) generated in the rear surface 226 of the vertical blade induces the air (air) on the liquid water surface to the inside of the hollow shaft 205a.

(2) The base body (air) guided to the inside of the hollow shaft 205a is dispersed below the liquid surface via the discharge hole 251.

Accordingly, in the present invention, unlike the prior art, there is no need for a separate injection device for discharging the gas (air) into the liquid water surface, and only the rotation of the hollow shaft 205 induces the air (Dispersion) is possible.

The second embodiment can be implemented in other forms as shown in Fig.

That is, the hollow member 255 may be arranged to be inclined obliquely from the side surface 208 of the hollow shaft toward the upper surface 241 of the disk.

At this time, one end 256 of the hollow member that engages with the side surface 208 of the hollow shaft is located at a position spaced apart from the upper surface 241 of the disk by a predetermined distance.

In this case also, the opening 257 of the hollow member formed at the other end of the hollow member 255 is located on the rear face 226 of the vertical wing.

The second embodiment can be implemented in other forms as shown in Fig.

On the other hand, Fig. 8 shows a dual shaft structure in another form of the second embodiment.

A center shaft 206 is inserted into the hollow shaft 205.

The air (air) guided into the hollow shaft 205 can be guided into the liquid through the discharge part 250 through the space 207 between the hollow shaft and the central shaft.

The center shaft 206 passes through the other end 209 of the hollow shaft, and then the other end 206b of the center shaft 206 is fixedly coupled to the upper surface 241 of the disk.

A space is formed between the inner diameter of the hollow shaft 205 and the outer diameter of the central shaft 206.

Accordingly, the air (air) can be introduced into the hollow shaft 205 through the inflow portion 110 formed on the side 106 of the hollow shaft as described above in the first embodiment.

A hole 210 is formed in a side of the other end 209 of the hollow shaft so that the side of the other end 209 of the hollow shaft communicates with the hollow member 255. The other end side hole 210 and the hollow 255 of the hollow shaft Communicate.

The hollow member 255 is disposed so as to incline obliquely toward the upper surface 241 of the disk from the side surface 208 of the hollow shaft.

At this time, the opening 257 of the hollow member is located on the rear surface 226 of the vertical blade.

In the first and second embodiments described above, the blades 120 and 220 include the vertical blades 125 and 225 and the inclined blades 130 and 230, respectively.

Hereinafter, the oblique vanes 130 and 230 constituting the blades 120 and 220 will be described with reference to FIG. 2, and the oblique vanes 130 will be described with reference to FIG.

The beveled wings 130 are positioned between the vertical blades 125 and the adjacent adjacent vertical blades 125.

That is, the vertical blade 125 and the oblique blade 130 are alternately arranged in the circular plate 140.

As will be described later, one side 121 of the blade is engaged with the edge 145 of the disk by fitting or welding.

In order to facilitate the coupling of the blade 120 and the disk 140, a groove 122 is preferably formed on one side 121 of the blade.

The edge 145 of the circular plate is fitted in the groove 122 formed in one side 121 of the blade and the blade 120 is fixedly coupled to the circular plate 140 by welding or the like.

The inclined wing 130 includes a first inclined wing 131 and a second inclined wing 132.

Specifically, the first portion 131a of the first inclined wing is as follows.

The first portion 131a of the first inclined wing has an oblique inclination with respect to the upper surface of the original plate.

The second portion 131b of the first inclined wing integrally formed with the first inclined wing 131a is as follows.

The lower surface 131c of the second section 131b of the first oblique vanes is in contact with the upper surface 141 of the disk and is fixed by welding or the like.

The width of the second portion 131b of the first inclined wing is smaller than the width of the first inclined wing 131a.

That is, one end 131d of the second part of the first inclined wing is positioned on an imaginary line extending vertically from the edge 145 of the disk.

The other end 131e of the second section of the first oblique vane is located at a position spaced from the one end 131d of the second section of the first oblique vane to the inside of the disk 140.

The other end 131e of the second portion of the first inclined wing is positioned on the same line as the other end 131f of the first portion of the first inclined wing.

As shown in the drawing, a first portion 131a of the first inclined wing is formed so that a part of the first inclined wing protrudes from the edge 145 of the disc to the outside of the disc 140, and the remainder is positioned on the disc 140 .

This means that the width of the first portion 131a of the first inclined wing is greater than the width of the second portion 131b of the first inclined wing.

The structure of the first inclined wing 131a and the second inclined wing 131b is the same in the second inclined wing 132 located on the lower surface 142 of the disk.

Therefore, a difference occurs between the width of the first section 131a of the first ramp and the width of the second section 131b of the first ramp.

On the other hand, a difference between the width of the first portion (not shown) of the second inclined wing and the width of the second portion of the second inclined wing also occurs.

The gap 135 is formed between the first inclined wing 131 and the second inclined wing 132 due to the difference in width described above.

The gap 135 formed between the first inclined wing 131 and the second inclined wing 132 may also reduce the resistance between the stirring object and the impeller 100 in the stirring operation.

The first inclined wing 131 and the second inclined wing 132 employed in the impeller 100 of the present invention concentrate the flow by the lift force and generate a strong shear fracture using the gradient of the pressure in the gas discharge region .

The gas (air) bubbles induced into the liquid water surface by the vertical blades 125 by the shear breaking action are finely crushed through the inclined blades 130.

That is, the inclined wing 130 breaks up the gas (air) bubbles induced into the liquid water surface to induce microbubbing.

Since the surface area of the microbubbed gas (air) is much larger, not only the efficiency of the mass transfer rate stirring operation is increased, Material shear rate can be increased.

(1) The inclined wings 130 can be deformed into various shapes.

The gap of reference numeral 135 in FIG. 10 may not be formed between the first inclined blade 131 and the second inclined blade 132.

That is, as shown in Fig. 11, the end face of the inclined wing 330 has a parabolic shape.

12, the angular point 330a of the oblique vane 330 is located closest to the front surface of the vertical vane 325. As shown in Fig.

The portion indicated by reference numeral 330b in the inclined wing 330 means the portion closest to the rear surface of the vertical wing 325 positioned behind one inclined wing 330. [

Meanwhile, between the reference numerals 330b and 330c, a plane is formed, and between the reference numerals 330a and 330c, a curve is formed.

When the inclined wing 330 is a parabola, the combination of the disc 140 and the inclined wing 130 is as follows.

After the edge 345 of the circular plate is inserted into the groove 333 formed at one side of the inclined wing 330, the inclined wing 330 is fixed to the circular plate 340 by welding or the like.

(2) In another embodiment of the inclined wing, the cross section of the inclined wing has a semicircle shape.

For reference, the oblique vane 530 shown in Fig. 18 can replace the oblique vane 330 shown in Fig.

As shown in Fig. 18, the oblique vanes 530 have a semicircular shape.

In the inclined wing 530, the vertex 530a of the inclined wing is located closest to the front surface of the adjacent vertical wing 525. [

The portion indicated by reference numeral 530b in the inclined wing 530 means the portion closest to the rear surface of the vertical wing 525 located behind one inclined wing 530. [

After the groove formed on one side of the inclined wing is inserted into the edge of the original plate, the inclined wing is fixed to the original plate by welding or the like.

The cross section of the oblique vane 530 has a semicircular shape when the part denoted by reference numeral 530b and the other part denoted by reference numeral 530b and the vertex 530a of the oblique vane are viewed.

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A third embodiment of the present invention is as follows.

10, 11 and 12 for the third embodiment.

The blades 320 are made up, including the vertical blades 325 and the beveled blades 330.

The circular plate 340 may further include a through hole 344 passing through the upper surface 341 and the lower surface 342 of the circular plate.

A plurality of through holes 344 are formed in the disk 340.

The through hole 344 is not located at the center of the disk 340 and is located along the edge 345 of the disk.

One through hole 344 and adjacent through hole 344 may be arranged to be equally spaced from each other and one example may be a through hole 344 extending between vertical blades 325 and other adjacent beveled blades 330 Lt; / RTI >

As shown in FIG. 10, a gap 335 may be further formed in the inclined wing 330.

As shown in Figs. 11 and 12, the oblique vanes 330 may have a parabolic cross section.

Effects of the third embodiment of the present invention are as follows.

When the through hole 344 is formed in the disc 340, the stirring object stored in the tank 30 can be increased in the vertical direction inside the tank 30 through the through hole 344 of the disc.

Therefore, the durability of the impeller 300 can be increased since not only the stirring efficiency is improved but also the resistance generated between the impeller 300 and the stirring object during stirring can be reduced.

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A fourth embodiment of the impeller 400 of the present invention will be described with reference to Figs. 13 and 14. Fig.

First, the impeller 400 includes a hollow shaft 405.

The inlet 410 is formed on one side 406 of the hollow shaft and is positioned above the liquid surface of the water contained in the tank 30.

The blade 420 is positioned on the other side 407 of the hollow shaft.

The blade 420 includes a vertical blade 425 and an inclined blade 430 positioned below the liquid surface.

The impeller 400 includes a disk 440 and the edge 445 of the disk engages with one side 421 of the blade.

The upper surface 441 of the disk also engages with the hollow shaft 405.

The disk 440 of the fourth embodiment has a certain thickness different from the disk described in the first to third embodiments.

Unlike the discs 140, 240, and 340 described in the first to third embodiments, the disc 440 of the fourth embodiment has a space 456 formed therein .

The disk inner space 456 communicates with the inside 405a of the hollow shaft (see the cross-sectional view of FIG. 14).

And a discharge portion 450 communicating with the hollow shaft 405 is formed in the side surface 443 of the disk.

In the fourth embodiment, the discharge portion 450 means the disk side surface hole 451.

In the fourth embodiment, the discharge portion 450 communicates with the disk interior space 456.

Therefore, the base body (air) guided to the inside of the hollow shaft 405a moves to the inside of the disk internal space 456 communicating with the inside of the hollow shaft 405a via the inside of the hollow shaft 405a.

The air (air) that has moved to the disk inner space 456 can be dispersed and led into the liquid water surface through the disk side holes 451.

The blade 420 including the vertical blades 425 and the inclined blades 430 is also formed in the fourth embodiment in such a manner that the inclined blades 430 are disposed between one vertical blade 425 and another adjacent vertical blade 425 Located.

Since the shapes of the vertical blades 425 and the inclined blades 430 have been described above, detailed description thereof will be omitted in the fourth embodiment.

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Hereinafter, a fifth embodiment of the present invention will be described with reference to Figs. 15 to 18. Fig.

The impeller according to the fifth embodiment includes a hub 510.

A hub hole 515 is formed in the hub 510.

In the hub hole 515, a double shaft structure as shown in Fig. 8 is inserted.

That is, the center shaft 206 described in the other form of the second embodiment is inserted into the hub hole 515 and fixed to the hub 510 by welding or the like.

The central axis 206 is inserted into the hollow shaft 205.

In the fifth embodiment, the double shaft structure inserted and fixed to the hub 510, specifically, the hub hole 515 has already been described in the other embodiment of the second embodiment, and thus a detailed description thereof will be omitted.

For reference, a base (air) introduced into the hollow shaft through a space (reference numeral 207 shown in FIG. 8) between the hollow shaft and the central shaft has an opening of the hollow member arranged to be positioned on the rear surface of the vertical vanes 525 ≪ / RTI >

The gas (air) discharged through the opening of the hollow member is guided into the liquid.

The inner diameter of the hub hole 515 may be formed differently depending on the outer diameter of a hollow shaft (not shown) coupled thereto.

The blade 520 is coupled to the side 517 of the hub.

These blades 520 are located below the liquid surface.

The blade 520 includes a vertical blade 525 and an inclined blade 530.

First, the coupling between the vertical vane 520 and the hub 510 is performed as follows.

The vertical vane 525 is coupled to one side 526 of the vertical vane on the side 517 of the hub as described above.

The vertical vane 525 is similar to a rectangular plate.

Therefore, the thickness of the vertical blades 525 is very thin compared to the width in the lateral direction and the height in the longitudinal direction.

At this time, one side 526 of the vertical blade is fixedly coupled to the side surface 517 of the hub by welding or the like.

The combination of the inclined wing 530 and the hub 510 is as follows.

In the fifth embodiment, the oblique vanes 530 can be made to have various shapes.

The inclined wing 530 includes a first inclined wing 531 and a second inclined wing 532. A gap 535 is formed between the first inclined wing 531 and the second inclined wing 532, Is formed.

One side of the first inclined wing 531 engages with the side 517 of the hub and one side of the second inclined wing 532 also engages with the side 517 of the hub, The upper ends of the second inclined wings 532 are spaced apart from each other by a predetermined distance to form the gap 535 described above.

Unlike the vertical vane 525, the first inclined vane 531 and the second inclined vane 532 are coupled to each other with a height direction of the hub 510.

In another embodiment of the inclined wing 530, a gap may not be formed and the cross section of the inclined wing may have a parabolic shape.

In this case, the cross section of the oblique wing can be said to form a parabola when viewed from the cross section of the oblique wing.

The vertex of this parabola is the closest to the vertical vane 525 located behind one sloping vane 530.

On the other hand, the above-described gap is not formed in the inclined wing 530, and the cross section of the inclined wing 530 may have a semicircular shape.

At this time, the inclined wing 530 is also located between one vertical wing 525 and another adjacent vertical wing 525.

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A sixth embodiment of the impeller of the present invention is as follows.

The impeller 600 includes a hub 610.

A hub hole 615 is formed in the hub 610.

In the hub hole 615, a double shaft structure as shown in Fig. 8 is inserted.

That is, the center shaft 206 described in the other form of the second embodiment is inserted into the hub hole 615 and fixed to the hub 610 by welding or the like.

For reference, the center shaft 206 is inserted into the hollow shaft 205.

The inner diameter of the hub hole 615 may be formed differently depending on the outer diameter of the central axis (reference numeral 206 in FIG. 8) coupling therewith.

On the other hand, the vertical blade 620 and the nozzle 630 are coupled to the side surface 617 of the hub.

The vertical wing 620 and the nozzle 630 are of course located below the liquid surface.

The configuration of the vertical vanes 620 and the structure in which the vertical vanes 620 are coupled to the hub 610 is the same as that of the fifth embodiment described above, and thus a detailed description thereof will be omitted.

The opening of the hollow member (numeral 257 in Fig. 7) is located on the rear face 626 of the vertical vane, so that gas (air) can be introduced into the liquid.

Hereinafter, the nozzle 630 will be described in detail.

The nozzle 630 is positioned between one vertical vane 625 and another adjacent vertical vane 625, as in the case of the inclined vane 530 described above.

The shape of the nozzle 630 is generally similar to a funnel.

That is, the nozzle inlet 631 is formed to have a larger cross-sectional area than the nozzle outlet 632 and is formed so as to have a smaller cross-sectional area from the nozzle inlet 631 toward the nozzle outlet 632.

When the hollow shaft 605 is rotated, the nozzle inlet 631 is opened so that the stirring object can be inserted into the nozzle 630.

The stirring object which has entered the nozzle 630 is also discharged through the nozzle outlet 632 which is also opened.

In the sixth embodiment, the nozzle inlet 631 is formed to have a larger cross-sectional area than the nozzle outlet 632.

That is, the longitudinal end face of the nozzle 630 gradually decreases from the nozzle inlet 631 to the nozzle outlet 632 with respect to the side surface of the nozzle 630.

The combination of the nozzle 630 and the hub 610 is performed as follows.

A support portion 640 is further formed between the nozzle 630 and the side surface 617 of the hub.

In the sixth embodiment, the support portion 640 is a long member and has a shape similar to a rod.

One end (641) of the support portion is joined to the side surface (617) of the hub by welding or the like.

The other end 642 of the support part is joined to the side surface 633 of the nozzle by welding or the like.

The impeller 600 of the sixth embodiment rotates in the clockwise direction in the tank 30 that houses the object (or liquid) to be stirred.

The stirring object (or liquid) passing through the nozzle 630 is mixed with the air (gas) discharged from the rear surface 626 of the vertical blade described above.

The principle that microbubbles are generated while passing through the nozzle 630 is as follows.

The nozzle inlet 631 is formed to have a larger cross-sectional area than the nozzle outlet 632, as described above.

As the impeller 600 rotates, the air (gas) mixed with the stirring object (or liquid) flows into the nozzle inlet 631.

 The air (gas) mixed with the stirring object (or liquid) flowing into the nozzle inlet 631 is compressed in a process in which the cross-sectional area of the air (gas) mixed with the stirring object (or liquid) moves to the nozzle outlet 632 than the nozzle inlet 631 .

The compressed air (gas) exits the nozzle outlet 632 again and meets a low pressure region formed near the nozzle outlet 632.

This pressure gradient acts as a strong shear breaking action, and the air (gas) is split into microbubbles.

20 is a power comparison graph of the prior art and the present invention.

Comparing impellers with the same number of blades, the present invention requires lower power (W) compared to the prior art for maintaining the same rpm.

Therefore, it can be seen that the energy consumption is small in the case of the impeller of the present invention.

Fig. 21 is a bubble size graph of the prior art and the present invention.

As a result of comparing the impellers having the same number of blades (number of blades: 6) after making the same power, in the case of the present invention, the number of microbubbles (bubble size 1 mm or less) .

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. It goes without saying that such changes are within the scope of the claims.

The impeller of the present invention not only can induce the gas (gas) into the liquid at a low rotation speed as compared with the prior art, but also the gas (gas) guided in the liquid can be easily broken into micro bubbles through the oblique wing The stirring efficiency is improved.

10: stirring device 20: motor
30: tank 100: impeller
105: hollow shaft 106: one side of the hollow shaft
107: the other side of the hollow shaft 108: the side of the hollow shaft
109: the other end of the hollow shaft 110:
111: side hole of hollow shaft 120: blade
121: one side of the blade 122: groove of the blade
125: vertical wing 126: rear face of vertical wing
130: oblique blade 131: first oblique blade
131a: first part of first inclined wing 131b: second part of first inclined wing
131c: the lower surface of the second section of the first ramp
131d: one end of the second part of the first warp wing
131e: the other end of the second part of the first warp wing
131f: the other end of the first part of the first inclined wing 132: the second inclined wing
135: gap 140: disc
141: upper surface of the original plate 142: lower surface of the original plate
145: edge of the original plate 150:
151: discharging hole

Claims (11)

Hollow shaft;
An inlet formed on one side of the hollow shaft and positioned above the liquid surface;
A blade located on the other side of the hollow shaft and including a vertical blade and an inclined blade located below the liquid surface;
A blade coupled to an edge of one side of the blade and having an upper surface coupled with the hollow shaft;
And a discharge portion located on a side surface of the hollow shaft, wherein the inclined wing is positioned between one vertical wing and another vertical wing adjacent to the vertical wing, The impeller of claim 1, wherein the discharge portion includes a hollow member communicating with a side surface of the hollow shaft The method according to claim 1,
Wherein the hollow member is disposed on an upper surface or a lower surface of the disk, and an opening of the hollow member is located on a rear surface of the vertical blade. The method according to any one of claims 1 to 3,
Wherein the inclined wing includes a first inclined wing and a second inclined wing, wherein a gap is formed between the first inclined wing and the second inclined wing, 4. The impeller of claim 1, wherein the disk further comprises a through hole penetrating the upper surface and the lower surface of the disk, The method of claim 5,
Characterized in that the through-hole is located between one vertical wing and another adjacent wing blade Hollow shaft;
An inlet formed on one side of the hollow shaft and positioned above the liquid surface;
A blade located on the other side of the hollow shaft and including a vertical blade and an inclined blade located below the liquid surface;
A blade coupled to an edge of one side of the blade and having an upper surface coupled with the hollow shaft;
Wherein a discharge portion communicating with the hollow shaft is formed on a side surface of the disk, and the inclined blade is located between one vertical blade and another vertical blade adjacent to the vertical blade. Herb;
And a blade coupled to a side surface of the hub and including a vertical blade and an inclined blade positioned below the liquid surface,
Characterized in that the inclined wing is located between one vertical wing and another adjacent vertical wing. The impeller of claim 8, wherein the inclined wing comprises a first inclined wing and a second inclined wing, wherein a gap is further formed between the first inclined wing and the second inclined wing Herb;
And a vertical blade and a nozzle coupled to the side surface of the hub and positioned below the liquid surface, wherein an inlet of the nozzle is formed to have a larger cross-sectional area than an outlet of the nozzle, Characterized in that the impeller The method of claim 10,
A support portion is further formed between the nozzle and the side surface of the hub,
Wherein one end of the support engages a side of the hub and the other end engages a side of the nozzle.

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