WO2020091131A1

WO2020091131A1 - Air blowing device including impeller provided with dual-structured blade

Info

Publication number: WO2020091131A1
Application number: PCT/KR2018/014158
Authority: WO
Inventors: 김용남
Original assignee: (주)한국송풍기엔지니어링
Priority date: 2018-10-31
Filing date: 2018-11-19
Publication date: 2020-05-07
Also published as: KR101977871B1

Abstract

An air blowing device according to the present invention is characterized by comprising an impeller (100) which includes: a rotating central plate (110) coupled to a driveshaft; a blade part (200) having multiple blades which are disposed apart from each other on the central plate (110); and a cover plate (120) spaced apart from the central plate (110) and covering the blade part (200). The blade part (200) has a dual structure in which main blades (210), which are formed inward from the outer circumferential edge of the central plate (110), and auxiliary blades (220), which have inner portions (221) and outer portions (222) integrally formed in an outward direction from the inside of the central plate (110), are disposed apart from each other in the circumferential direction. The main blades (210) and the outer portions (222) of the auxiliary blades (220) are formed to overlap in the circumferential direction.

Description

Blower including impeller with double structure blade

The present invention relates to a blower device including an impeller. Specifically, it relates to a technology provided with a main blade and an auxiliary blade overlapping in a circumferential direction.

Blower is a type of air transport device that is mainly used in air conditioners, ventilators, or other ventilators, and is also used in air conditioners and coolers, and includes an impeller equipped with blades that generate wind. , It consists of a casing to guide the wind entering and exiting the impeller.

1a and 1b show an impeller and a blower according to the prior art. As an example of the impeller, as shown in Figure 1a, the drive shaft 20 is provided with a central plate 10, the center plate 10 and the cover plate 11, 12 and the center plate 10 is disposed spaced apart Between the cover plate 11 and 12, the blade 13 has a configuration. 1A is a configuration in which the blades 13 are arranged on both sides of the central plate 10. 1B shows the casing 30 in which the impeller of FIG. 1A is incorporated.

In the case of a blower used in a dusty environment such as a steel mill, a power plant, or a cement plant, inflow air (dust) often contains particles having high hardness. In this case, abrasion is generated in the blade due to collision or friction with particles, thereby reducing the life of the impeller and shortening the replacement cycle, resulting in a problem of increasing manufacturing and replacement costs.

In order to solve such a wear problem, the present applicant has proposed a double-structured blade in Korean Patent Registration No. 10-1599046. The present invention is a further improvement and development of the above invention.

Blower device comprising an impeller having a double structure blade according to the present invention has the following problems.

First, I would like to systematically present the principle of creating the dual structure of the main blade and the auxiliary blade.

Second, I would like to present the correlation between the main blade and the auxiliary blade.

Third, it is intended to present various shapes and heights of auxiliary blades.

Fourth, it is intended to increase the wear resistance through this, and to increase the blowing efficiency through smooth wind flow.

The problems of the present invention are not limited to those mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

The present invention is a blower having an impeller including a central plate that rotates in combination with a drive shaft, a blade portion in which a plurality of blades are spaced apart on the central plate, and a cover plate spaced apart from the central plate to cover the blade portion. As, the blade portion is a dual structure in which the main blade formed in the inner circumferential direction of the center plate and the secondary blade formed integrally with the inner and outer portions formed in the outer direction from the inner side of the center plate are arranged in a circumferential direction, It is characterized in that the outer portion of the auxiliary blade and the main blade are formed to overlap in a circumferential direction.

In the present invention, by setting a virtual boundary line (Line 1) connecting the inner ends of the main blades in a circle, the first and second areas (Aear 1) and the second area (Aear 2) are separated from the inside and outside of the boundary line. , In the first area (Aear 1), an inner part of the auxiliary blade may be disposed, and in the second area (Aear 2), an outer part of the auxiliary blade and the main blade may be arranged.

In the present invention, the flat cross-sectional shape of the main blade is provided in a straight shape, the flat cross-sectional shape of the inner portion of the auxiliary blade is provided in a curved shape, the flat cross-sectional shape of the outer portion of the auxiliary blade is the shape of the main blade It may be provided corresponding to.

In the present invention, the auxiliary blade is an intermediate point (P1) of one contact point (Pa) that the inner end of one main blade contacts with the other end of the boundary line (Line 1) and another contact (Pb) that the inner end of the other main blade contacts. It can be arranged to cross.

In the present invention, the auxiliary blade is the intermediate point (P1-a) of the intermediate point (P1) and the one contact (Pa) of the boundary line (Line 1), the intermediate point (P1) and the other contact ( It may be disposed between the intermediate points (P1-b) of Pb).

In the present invention, the outer portion of the auxiliary blade may be disposed at an angle θ equal to the angle θ where the main blade is disposed with respect to the boundary line 1.

In the present invention, the inner end of the auxiliary blade is an imaginary straight line (Line 2) extending the outer portion 220 of the auxiliary blade is horizontally moved to a virtual boundary line (Line 3) connecting the inner ends of the auxiliary blades in a circle. It is preferable that it is the point P2 in contact with.

In the present invention, it is preferable that the length of the outer portion of the auxiliary blade is 1/2 or less of the length of the main blade.

In the present invention, the height of the inner portion of the auxiliary blade may be provided in a structure in which the height increases from the inner end to the outside or a structure having the same height.

In the present invention, the height of the outer portion of the auxiliary blade is preferably one of the same structure as the height of the portion in contact with the inner portion or a structure in which the height increases toward the outside or a structure in which the height decreases toward the outside.

In the present invention, the height (H2) of the outer end of the outer portion of the auxiliary blade is preferably 30% to 100% of the height (H1) of the same position of the main blade.

In the present invention, the height (H2) of the outer end of the outer portion of the auxiliary blade is preferably 30% to 60% of the height (H1) of the same position of the main blade.

In the present invention, the front shape of the inner portion of the auxiliary blade is at least one of a flat shape, a bended shape, or a twisted shape. The front shape of the outer portion of the auxiliary blade is It is preferably at least one of a flat shape or a bended shape.

In the present invention, the curved shape is preferably a curved shape such that the direction in which the wind flows is convex.

In the present invention, the inner portion of the auxiliary blade is a bent shape or a twisted shape, and the outer portion may be provided in a flat shape.

The present invention is coupled to the drive shaft and the rotating central plate, the upper and lower blades of the central plate, the blade portion is spaced apart and the central plate is spaced apart from the central plate impeller including both cover plates provided to cover the blade portion As a blower having a, the blade portion is disposed in the circumferential direction of the main blade formed in the inner direction from the outer periphery of the central plate, and the inner and outer portions formed in the outer direction from the inner side of the central plate integrally It is a dual structure, characterized in that the outer portion of the auxiliary blade and the main blade are formed to overlap in the circumferential direction.

A blower device including an impeller having a double structure blade according to the present invention has the following effects.

First, there is an effect that a technical configuration for arranging an auxiliary blade based on the main blade is presented.

Second, the length and height of the auxiliary blade compared to the main blade are presented, thereby improving the wear resistance.

Third, there is an effect of improving abrasion resistance and increasing the blowing amount by the flat shape, curved shape, and twisted shape of the auxiliary blade.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned will become apparent to those skilled in the art from the following description.

1 shows an impeller and a blower according to the prior art.

2 shows several embodiments of the impeller according to the invention.

3 and 4 show an embodiment in which the main blade and the auxiliary blade according to the present invention are disposed.

5 is a plan view of an embodiment of the double structure blade unit according to the present invention.

6 to 9 show the principle of manufacturing the auxiliary blade according to the present invention.

10 to 12 show the shape and height of the auxiliary blade according to the present invention.

[Description of codes]

100: impeller 110: center plate

120: cover plate

200: blade unit

210: main blade 210a: inner end

220: auxiliary blade 220a: inner end

221: inner part 222: outer part

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains can easily practice. As those of ordinary skill in the art to which the present invention pertains can readily understand, the embodiments described below may be modified in various forms without departing from the concept and scope of the present invention. Where possible, the same or similar parts are indicated by the same reference numerals in the drawings.

The terminology used herein is for the purpose of referring only to specific embodiments and is not intended to limit the invention. The singular forms used herein include plural forms unless the phrases clearly indicate the opposite.

As used herein, the meaning of “comprising” embodies certain properties, regions, integers, steps, actions, elements and / or components, and other specific properties, regions, integers, steps, actions, elements, components and / or It does not exclude the presence or addition of military forces.

All terms including technical terms and scientific terms used in the present specification have the same meaning as those generally understood by those skilled in the art to which the present invention pertains. Terms defined in the dictionary are additionally interpreted as having a meaning consistent with the related technical literature and the presently disclosed content, and are not interpreted in an ideal or very formal sense unless defined.

In order to easily describe the features of the present invention, it is revealed that the drawings may be partially exaggerated, or only necessary parts may be extracted when necessary. That is, the drawings are merely means for easily expressing the technical constitutional features of the present invention, and the technical constitution of the present invention is not necessarily interpreted as illustrated in the drawings.

It is preferable that the standards of the directions of the up, down, left, and right directions and the front direction, the plane direction, etc. used in this specification are interpreted with reference to the drawings.

Hereinafter, the present invention will be described with reference to the drawings.

The main technical feature of the present invention is to arrange the auxiliary blades in the circumferential direction between the main blades. The overlapping arrangement is made on the central side of the main plate, not on the outer periphery of the main plate.

In a blower, a particle may be contained in air to be blown. In this case, according to the flow path of the blowing wind, particles collide with the main blade, causing the main blade to wear.

However, as in the present invention, when the auxiliary blade is installed, air flow is minimized to collide with the main blade, thereby preventing wear of the main blade as much as possible.

Furthermore, it is possible to prevent abnormal noise by smoothing the flow of air, reducing the abrasion of the blade to extend the service life, and enabling stable operation. It is preferable that the auxiliary blade is made of high-manganese steel, which is a wear-resistant material capable of increasing wear resistance.

The present invention is coupled to the drive shaft (see FIG. 1A) and rotates the central plate 110, a plurality of blades on the central plate 110 is spaced apart from the blade portion 200 and the central plate 110, the above It relates to a blower having an impeller 100 including a cover plate 120 provided to cover the blade unit 200.

In the present invention, the blade unit 200 is a main blade 210 formed in the inner direction from the outer periphery of the center plate 110, and the inner portion 221 formed in the outer direction from the inside of the center plate 110 and The outer blade 222 may be provided with a dual structure in which the auxiliary blades 220 integrally formed are spaced apart in the circumferential direction (see FIGS. 3 to 5).

FIG. 4B is a view in which parts of the main blade 210 and the auxiliary blade 220 provided in FIG. 4A are arbitrarily removed to express the relationship between the main blade 210 and the auxiliary blade 220 in more detail.

In the present invention, the outer portion 222 of the auxiliary blade 220 and the main blade 210 may be formed to overlap in the circumferential direction. That is, the present invention is a configuration in which the main blade and the auxiliary blade do not overlap at the outer periphery of the central plate 110, and corresponds to a configuration overlapping at the central side of the central plate.

In the first area (Aear 1), the inner part 221 of the auxiliary blade 220 may be disposed, and in the second area (Aear 2), the outer part 222 and the main blade 210 of the auxiliary blade 220 are circumferential. It can be placed in an overlapping direction.

In the present invention, as shown in FIG. 6, an imaginary boundary line 1 that circularly connects the inner ends 210a of the main blade 210 is set. In addition, the first area (Aear 1) and the second area (Aear 2) may be distinguished between the inside and outside of the boundary line.

In the present invention, the flat cross-sectional shape of the main blade 210 disposed in the second region may be provided in a straight shape. The flat cross-sectional shape of the inner portion 221 of the auxiliary blade 220 disposed in the first region is provided in a curved shape, and the flat cross-sectional shape of the outer portion 222 of the auxiliary blade 220 disposed in the second region is the main blade. It may be provided to correspond to the shape of (210).

When the flat cross-sectional shape of the inner portion 221 of the auxiliary blade 220 is provided in a curved shape, the air is naturally moved and distributed to the main blade 210 while following the flow of air flowing in the vortex form at the inlet air inlet. It is for the purpose.

In the case of the outer portion 222 of the auxiliary blade 220, since the flat cross-sectional shape of the adjacent main blade 210 is a straight shape, it is provided in a straight shape corresponding thereto, thereby preventing the overall air flow by the main blade 210. It is intended to follow without doing.

6 to 9 show the principle of manufacturing the auxiliary blade according to the present invention. Hereinafter, the principle of manufacturing the auxiliary blade will be described.

First, the principle of manufacturing the outer portion 222 of the auxiliary blade 220 will be described. As illustrated in FIG. 6, the auxiliary blade 220 includes one contact point Pa contacting the inner end 210a of the main blade 210 of the boundary line 1 and an inner end of the other main blade 210 ( It is preferable that 210a) is arranged to intersect the intermediate point P1 of the other contact point Pb.

Next, the intermediate point P1 corresponds to the most preferred embodiment, and other possible arrangement ranges are as follows. As illustrated in FIG. 7, the auxiliary blade 220 has an intermediate point P1 and an intermediate point P1-a of the boundary line Line 1 and one contact point Pa, and an intermediate point P1 and the other contact point ( It is possible to be disposed between the intermediate points (P1-b) of Pb).

The auxiliary blade 220 is intended to prevent the incoming air and particles contained therein from colliding with the main blade 210. When the auxiliary blade 220 approaches the main blade 210 too closely, the accessed main blade ( Since the possibility of particle collision increases to 210), it is preferable to be disposed within the above-described arrangement range.

Next, the arrangement angle of the outer portion 222 of the auxiliary blade 220 will be described. 6, the outer portion 222 of the auxiliary blade 220 is preferably disposed at an angle θ equal to the angle θ where the main blade 210 is disposed with respect to the boundary line 1 Do. This is as described above, is provided with the arrangement angle of the linear shape of the adjacent main blade 210, is intended to follow without disturbing the overall air flow by the main blade 210 as much as possible.

Next, the length of the outer portion 222 of the auxiliary blade 220 is preferably provided with a length of 1/2 or less of the length of the main blade 210. The outer portion 222 of the auxiliary blade 220 is disposed to overlap the main blade 210 in the circumferential direction. As the length of the outer portion 222 of the auxiliary blade 220 exceeds 1/2 of the length of the main blade 210 and becomes similar to the length of the main blade, an effect of adding the main blade may be generated. In this case, only the gap between the main blades is narrowed, and thus the air flow is not smooth, so that problems such as collision or friction of particles may occur in the main blade.

Next, the principle of manufacturing the inner portion 221 of the auxiliary blade 220 will be described. As shown in FIG. 8, the inner end 220a of the auxiliary blade 220 is horizontally moved by an imaginary straight line 2 extending the outer part 220 of the auxiliary blade 220, so that the inside end of the auxiliary blade 220 It is preferable that the point P2 is in contact with the virtual boundary line (Line 3) connecting the (220a) in a circle.

As illustrated in FIG. 9, the inner portion 221 may be formed as a curve connecting the points P1 and P2, and the flat cross-sectional shape of the inner portion 221 of the auxiliary blade 220 is curved. It is intended to move and distribute air naturally to the main blade 210 while following the flow of air flowing in the vortex form from the inlet air inlet. Therefore, the curvature of the curve can be variously applied according to the state of the inflowing air.

Next, the height of the inner portion 221 of the auxiliary blade 220 may be provided in a structure in which the height increases from the inner end 220a toward the outside or a structure having the same height.

Next, the height of the outer portion 222 of the auxiliary blade 220 is either the same structure as the height of the portion in contact with the inner portion 221 or a structure in which the height increases toward the outside or a structure in which the height decreases toward the outside. It is preferred.

10A shows the same embodiment in which the height of the inner portion 221 of the auxiliary blade 220 is the same, and the height of the outer portion 222 is also the height of the portion in contact with the inner portion 221.

10B shows the same embodiment as the height of the inner portion 221 of the auxiliary blade 220 increases from the inner end 220a toward the outside, and the height of the outer portion 222 is the height of the portion in contact with the inner portion 221. .

10C shows an embodiment in which the height of the inner portion 221 of the auxiliary blade 220 is the same, and the height of the outer portion 222 decreases toward the outside from a portion in contact with the inner portion 221.

10D shows an embodiment in which the height of the inner portion 221 of the blade 220 increases toward the outside, and the height of the outer portion 222 increases toward the outside.

Next, the height H2 of the outer end 220b of the outer portion 222 of the auxiliary blade 220 is preferably 30% to 100% of the height H1 of the same position of the main blade 210 (FIG. 11). Furthermore, it is more preferable that the height H2 of the outer end 220b of the outer portion 222 of the auxiliary blade 220 is 30% to 60% of the height H1 of the same position of the main blade 210.

When the height H2 of the outer portion 222 of the auxiliary blade 220 becomes less than 30% of the height H1 of the main blade 210, the width (height) of the blade controlling the air is too narrow. Therefore, there is a problem that the air direction cannot be controlled. Length (H2) is at least 30% of the length compared to the length (H1) should be secured to control the air direction to the main blade 210 is effective to prevent particles from colliding with the main blade.

Next, the shape of the auxiliary blade 220 will be described. The front shape of the inner portion 221 of the auxiliary blade 220 may be at least one of a flat shape, a bended shape, or a twisted shape. The front shape of the outer portion 222 of the auxiliary blade 220 may be at least one of a flat shape and a bended shape.

12A to 12C are examples of a bended shape, and FIG. 12D is an example of a twisted shape.

In this embodiment, the curved shape is preferably a curved shape such that the direction in which the wind flows is convex (see FIGS. 12A to 12C).

In the present invention, an embodiment in which the inner portion 221 of the auxiliary blade 220 is a bent shape or a twisted shape, and the outer portion 222 is provided in a flat shape is possible.

On the other hand, the above description is an embodiment in which the blade is provided on one side of the center plate. The present invention, as shown in Figures 2 and 3, an embodiment in which the blades are spaced apart on both sides of the center plate is also possible.

The present invention is coupled to the drive shaft and rotates the central plate 110, the blade portion 200 and the center plate 110 is spaced apart a plurality of blades on the upper and lower sides of the central plate 110 is spaced apart from the blade As a blower having an impeller 100 including both cover

plates

120a and 120b provided to cover the portion 200, the blade portion 200 is inward direction from the outer periphery of the center plate 110 A dual structure in which the main blade 210 formed by, and the auxiliary blade 220 formed integrally with the inner portion 221 and the outer portion 222 formed from the inner side to the outer side of the center plate 110 are spaced apart in the circumferential direction And, the outer portion 222 of the auxiliary blade 220 and the main blade 210 may be an embodiment formed to overlap in the circumferential direction.

The embodiments described in the present specification and the accompanying drawings are merely illustrative of some of the technical spirit included in the present invention. Therefore, the embodiments disclosed in the present specification are not intended to limit the technical spirit of the present invention, but to explain the scope of the technical spirit of the present invention. Within the scope of the technical spirit included in the specification and drawings of the present invention, modifications and specific embodiments that can be easily inferred by those skilled in the art should be interpreted as being included in the scope of the present invention.

Claims

A blower having an impeller including a central plate that rotates in combination with a drive shaft, a blade portion in which a plurality of blades are spaced apart on the central plate, and a cover plate spaced apart from the central plate to cover the blade portion,

The blade portion is a dual structure in which a main blade formed in an inner direction from an outer circumference of the central plate, and an auxiliary blade integrally formed with an inner portion and an outer portion formed in an outer direction from the center plate are arranged in a circumferential direction,

Blowing device including an impeller having a double structure blade, characterized in that the outer portion of the auxiliary blade and the main blade are formed to overlap in the circumferential direction.
The method according to claim 1,

By setting a virtual boundary line (Line 1) connecting the inner ends of the main blades in a circle, the first area (Aear 1) and the second area (Aear 2) are separated from the inside and outside of the boundary line,

The inner portion of the auxiliary blade is disposed in the first area (Aear 1),

In the second area (Aear 2), an air blower including an impeller having a double structure blade portion, characterized in that an outer portion of the auxiliary blade and the main blade are disposed.
The method according to claim 2,

The flat cross-sectional shape of the main blade is provided in a straight shape,

The flat cross-sectional shape of the inner portion of the auxiliary blade is provided in a curved shape,

Blowing device including an impeller having a double-structured blade portion, characterized in that the flat section of the outer portion of the auxiliary blade is provided to correspond to the shape of the main blade.
The method according to claim 3,

The auxiliary blade is disposed so as to intersect the midpoint (P1) of one contact point (Pa) of the boundary line (Line 1), which is in contact with the inner end of one main blade and the other contact (Pb), which is in contact with the inner end of the other main blade. Blower including an impeller having a double structure blade portion characterized in that.
The method according to claim 4,

The auxiliary blade is among the boundary lines (Line 1)

Characterized in that it is disposed between the intermediate point (P1) and the intermediate point (P1-a) of the one contact (Pa), and the intermediate point (P1) of the intermediate point (P1) and the other contact point (Pb) Blower comprising an impeller having a double structure blade portion.
The method according to claim 3,

Blowing device including an impeller having a double structure blade characterized in that the outer portion of the auxiliary blade is disposed at the same angle (θ) as the main blade is disposed with respect to the boundary line (Line 1).
The method according to claim 6,

The inner end of the auxiliary blade

A double characterized in that the virtual straight line (Line 2) extending the outer portion 220 of the auxiliary blade is a point (P2) that moves horizontally to abut a virtual boundary line (Line 3) connecting the inner ends of the auxiliary blade circularly. Blower including an impeller having a structural blade.
The method according to claim 1,

The length of the outer portion of the auxiliary blade is

Blower including an impeller having a double structure blade portion, characterized in that the length of less than 1/2 of the length of the main blade.
The method according to claim 1,

The height of the inner portion of the auxiliary blade

A blower comprising an impeller having a double structure blade, characterized in that the structure increases in height or increases in height from the inner end to the outside.
The method according to claim 1,

The height of the outer portion of the auxiliary blade

Blowing including an impeller having a double structure blade, characterized in that either the same structure as the height of the portion in contact with the inner portion 221 or a structure in which the height increases toward the outside or a structure in which the height decreases toward the outside. Device.
The method according to claim 1,

The height (H2) of the outer end of the outer portion of the auxiliary blade is

Blower comprising an impeller having a double structure blade portion, characterized in that 30% to 100% of the height (H1) of the same position of the main blade.
The method according to claim 11,

The height (H2) of the outer end of the outer portion of the auxiliary blade is

Blower comprising an impeller having a double structure blade portion, characterized in that 30% to 60% of the height (H1) of the same position of the main blade.
The method according to claim 1,

The front shape of the inner portion of the auxiliary blade is

At least one of a flat shape, a bended shape, or a twisted shape,

The front shape of the outer portion of the auxiliary blade is

Blower comprising an impeller having a double structure blade, characterized in that at least one of a flat shape (flat shape) or a curved shape (bended shape).
The method according to claim 13,

The bent shape is a blower including an impeller having a double structure blade, characterized in that the curved shape is convex so that the direction in which the wind flows.
The method according to claim 13,

Blowing device including an impeller having a double structure blade, characterized in that the inner portion of the auxiliary blade is a bent shape or a twisted shape, and the outer portion is provided in a flat shape.
A central plate that is rotated in combination with a drive shaft, a blade portion in which a plurality of blades are spaced apart on the upper and lower sides of the central plate, and both cover plates 120a and 120b provided to cover the blade portion spaced apart from the central plate. As a blower having an impeller containing,

The blade portion is a dual structure in which a main blade formed in an inner direction from an outer circumference of the central plate, and an auxiliary blade integrally formed with an inner portion and an outer portion formed in an outer direction from the center plate are arranged in a circumferential direction,

Blowing device including an impeller having a double structure blade, characterized in that the outer portion of the auxiliary blade and the main blade are formed to overlap in the circumferential direction.