KR20220032333A - Impeller with double gadient blade - Google Patents

Abstract

The present invention relates to an impeller which comprises: a main plate having a rotational shaft; a plurality of blades spaced from one surface of the main plate in a circumferential direction, having a backward rear curved surface formed in an opposite direction to a rotating direction of the main plate, and having a backward front curved surface extended from the backward rear curved surface; a side plate spaced to face the main plate, connected to the plurality of blades, and having an inlet hole which allows fluid to be introduced thereinto and is formed in a center portion of the side plate; and an outer ring disposed between the main plate and the side plate and connected to outer diameter end parts of the plurality of blades. The blade having a double gradient shape is installed to improve an air volume and static pressure to reduce a size of the impeller, and the blade is reinforced to have sufficient rigidity to prevent the blade from being deformed.

Description

IMPELLER WITH DOUBLE GADIENT BLADE

The present invention relates to an impeller, and more particularly, it is possible to reduce the size by improving the air volume and static pressure by installing a blade having a double gradient shape, and to prevent the blade from being deformed by reinforcing the blade to have sufficient rigidity. It relates to a double-belt impeller that can be

In general, an impeller is a main part of a pump, blower, or compressor, and it rotates with several blades arranged at equal intervals on the circumference. Energy is created as it flows through the feathers.

And in general, the blade is divided into a centrifugal type and an axial flow type, the centrifugal blade flows perpendicular to the axis on which the fluid or gas is rotated, and in the axial flow type blade, the fluid or gas flows in the direction of the axis of rotation.

Here, the centrifugal impeller is a centrifugal impeller that generates pressure while air is transported in the radial direction, and is classified into a backward curved blade or a backward straight blade centrifugal impeller.

The backward curved blade centrifugal impeller is a centrifugal impeller in which the impeller blade is tilted backward with respect to the direction of rotation, and the blade has a simple arc-shaped convex surface with respect to the rotation direction. It is a centrifugal impeller which is inclined backward and is composed of blades with a flat surface with respect to the direction of rotation.

The backward curved blade centrifugal impeller is known to have superior efficiency and performance compared to the backward curved blade centrifugal impeller.

However, the conventional backward curved blade centrifugal impeller has a problem in that it is difficult to miniaturize the impeller because the required air volume is determined according to the type or performance of the blower used, and the minimum required length of the impeller blade is limited.

In addition, in the conventional centrifugal impeller, the upper and lower surfaces of the impeller blade formed between the main plate and the side plate are fixed to each of the main plate and the side plate without a separate support. There was a problem in that the impeller blades were deformed during transport or operation.

Republic of Korea Patent Registration No. 10-1985690 (Registered on May 29, 2019)

The present invention has been devised to solve the above problems, and the present invention is to provide an impeller capable of reducing the size by improving the air volume and static pressure compared to the existing shape by installing a blade having a double gradient shape.

In addition, the present invention is to provide an impeller capable of preventing the blade from being deformed by installing a reinforcing ring on the blade to have sufficient rigidity.

In order to solve the above problems, the double-beveled impeller of the present invention is an abacus having a rotating shaft, a backward curved surface and a backward curved surface that are spaced apart along the circumferential direction on one surface of the abacus and formed in the opposite direction to the rotation direction of the abacus A plurality of blades having a backward curved surface extending from, a side plate that is spaced apart from the main plate and disposed to face, is connected to the plurality of blades and has an inlet through which a fluid flows in the central part, and is disposed between the main plate and the side plate and of the plurality of blades It may include an outer ring connected to the outer diameter end.

In addition, the double draft impeller of the present invention may further include an inner ring disposed between the main plate and the side plate and connected to the inner diameter ends of the plurality of blades.

In addition, the plurality of blades further include a length adjusting part formed adjacent to the main plate or side plate, and the length adjusting part may include a wrinkle member extending from the blade and an outer skin material coupled to the outside of the blade to surround the wrinkle member. there is.

In addition, the double curved blade impeller of the present invention includes a plurality of double curved blades having a backward curved surface and a backward forward curved surface, and a plurality of linear blades arranged to be spaced apart from the double curved blade, and the double curved blades and the linear blades are alternately arranged. can be placed.

In addition, the plurality of blades may further include a first plane extending in a straight line from the front end of the backward curved surface and a second plane extending in a straight line from the rear end of the backward curved surface.

According to the present invention, the size of the blower can be reduced because the air volume and static pressure are improved compared to the existing shape by installing the blade of the double gradient shape, and the cost required for manufacturing, transportation, and installation can be reduced because the blower can be miniaturized.

In addition, the present invention can reduce the maintenance cost by preventing the blade from being deformed by installing a reinforcing ring on the blade to have sufficient rigidity.

1 is a plan view schematically showing a double-beveled impeller according to an embodiment of the present invention.
Figure 2 is a perspective view schematically showing a double draft impeller according to an embodiment of the present invention.
Figure 3 is a view showing a cross-section of the blade of the double draft impeller according to the second embodiment of the present invention.
4 is a plan view schematically showing a double-leaved blade impeller according to a third embodiment of the present invention.
5 is a partial enlarged view schematically showing a double-leaved blade impeller according to a fourth embodiment of the present invention.
Figure 6 is a partial enlarged view schematically showing a double-belt impeller according to a fifth embodiment of the present invention.

Advantages and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms.

Hereinafter, the technical features of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a plan view schematically showing a double-beveled impeller according to an embodiment of the present invention, Figure 2 is a perspective view schematically showing a double-leaved blade impeller according to an embodiment of the present invention.

The configuration and function of the double-leaved impeller 100 according to the present embodiment will be described with reference to FIGS. 1 and 2 .

The double sloped impeller 100 according to the present embodiment may include an abacus 10 , a plurality of blades 20 , a side plate 30 and an outer ring 40 .

The abacus 10 may be formed in a circular flat plate, and the rotation shaft 11 may be fixedly installed thereon.

Here, the rotating shaft 11 has one side fixed to the central part of the main plate 10, and the other side is installed inside a device such as a casing to transmit rotational force. It protrudes to the outside and is connected to a rotating device (not shown) such as a motor, and is rotated by the rotating device to transmit rotational force to the abacus 10 .

The main plate 10 may be rotated along the rotational direction R about the rotational shaft 11 .

A plurality of blades 20 are arranged to be spaced apart from each other in the circumferential direction on one surface of the abacus 10 , and the fluid is transferred to one side according to the rotation of the abacus 10 .

Here, the blade 20 may be formed in a curved shape having a cross-sectional shape of a double gradient in a rearward direction, and is spaced apart from the central portion to the edge side of the abacus 10 in a direction opposite to the rotation direction (R) of the abacus 10 It may have a back-to-back curved surface 20a formed to extend and a front-to-back curved surface 20b extending from the back-to-back curved surface 20a.

At this time, the blade 20 according to the present embodiment has a shape in which the backward curved surface 20a and the backward forward curved surface 20b are continuously arranged, so that the generated pressure and air volume can be increased compared to the conventional straight blade or curved blade. there will be That is, as the area of the blade 20 in contact with the fluid increases, the area corresponding to the flow of the fluid increases.

The side plate 30 is spaced apart to face the main plate 10 , and a suction port 31 through which a fluid is introduced may be formed in the central portion, and may be connected to the upper surface of the blade 20 .

This side plate 30 is connected to the blade 20 of the double gradient cross-sectional shape at the position opposite to the main plate 10 to reinforce the strength of the blade 20 and maintain the overall shape of the impeller, and the air is smoothly sucked and A feather passage will be provided for discharge. That is, the abacus 10 functions as a partition to block the upper portion so that a fluid flow path (not shown) is formed between the blade 20 and the blade 20 .

The outer ring 40 may be formed of a ring-shaped reinforcing member and may be positioned between the main plate 10 and the side plate 30 and connected to the outer diameter side end of the blade 20 .

The outer ring 40 may be attached to the end of the backward curved surface 20b of the blade 20 by welding or bonding.

As such, the outer ring 40 according to this embodiment connects the plurality of blades 20 by circumscribing and thus increases the rigidity of the blade 20 connecting between the main plate 10 and the side plate 30, and the blade ( 20) can be prevented.

Here, the outer ring 40 may include a first ring member 41 and a second ring member 42 .

The first ring member 41 and the second ring member 42 may be disposed to be spaced apart from each other, and since the blade 20 can be reinforced at each of the upper and lower positions, the rigidity of the blade 20 is further increased. (20) is prevented from being deformed.

Therefore, according to the double sloping blade impeller 100 according to the present embodiment, the generated air volume and pressure are improved compared to the existing shape formed with the same size, so even if it is manufactured with a smaller size, the same performance can be achieved miniaturization is possible, and the cost required for manufacturing, transportation, and installation can be reduced due to the miniaturization.

In addition, according to the double sloped impeller 100 according to the present embodiment, since the reinforcing member connecting the blade 20 is installed, it is possible to prevent deformation of the blade 20, thereby increasing the life of the impeller, maintenance and repair cost can be reduced.

In particular, the abacus 10 and the upper plate 30 are supported only by the blades 20 installed to cross the abacus 10 and the upper plate 30, and the double inclined blade impeller 100 according to the present embodiment is outside Since the rigidity of the blade 20 can be reinforced by the ring 40, it is possible to minimize the occurrence of deformation of the blade 20 during transportation or operation.

Referring back to FIG. 2 , the double-belt impeller 100 according to the present embodiment may include an inner ring 50 .

The inner ring 50 may be formed of a ring-shaped reinforcing member, is positioned between the main plate 10 and the side plate 30 , and may be connected to the inner diameter side end of the blade 20 .

The inner ring 50 may be attached to the end of the backward curved surface 20a of the blade 20 by welding or bonding.

Since the inner ring 50 according to this embodiment connects the plurality of blades 20 in inscribedly, the blade 20 connecting the main plate 10 and the side plate 30 together with the outer ring 40 which is externally circumscribed. ) to further increase the rigidity, and to induce stable rotation when the blade 20 is rotated, thereby preventing deformation and the like occurring in the blade 20 .

3 is a view showing a cross-section of the blade of the double-slope impeller according to the second embodiment of the present invention, and is an enlarged view of the cross-section of a portion B of the double-slope impeller of FIG. 2 .

With reference to FIG. 3, the configuration and function of the double-edged blade impeller 200 according to the present embodiment will be described.

The double-deflected impeller 200 according to the third embodiment of the present invention has the same configuration as the double-slope impeller 100 according to the first embodiment except for the configuration of the blade 220 .

Therefore, hereinafter, a detailed description of the same configuration as that of the double draft impeller 100 according to the first embodiment of the present invention will be omitted.

Referring to FIG. 3 , the double sloped impeller 200 according to the present embodiment may include a length adjusting unit (not shown) formed on the upper or lower portion of the blade 220 .

The length adjusting part is for adjusting the height direction length of the blade 220 and may be formed in at least one position of a part connected to the main plate 210 or a part connected to the side plate 230 . In addition, the length adjusting unit may be formed over the entire area of the blade 220 .

For example, as shown in FIG. 3 , the length adjusting unit includes a pleated member 221 formed at the end of the blade 220 and an outer skin material formed on the outside of the blade 220 to surround the pleated member 221 . (222). The figure shows a length adjusting part formed in a portion connected to the abacus 210 .

The wrinkle member 221 may be formed to extend in a bellows shape, and its length may be extended or reduced at the end of the blade 220 .

The outer skin material 222 may be formed to surround the outer surface of the blade 220 together with the wrinkle member 221 , and may be formed of a material that can expand or contract in response to the shape deformation of the wrinkle member 221 . As an example, the outer skin material 222 may be an engineering plastic such as carbon reinforced fiber.

The length adjusting unit can extend or reduce the length in the height direction of the blade 220 , and by adjusting the length of the blade 220 connecting the main plate 210 and the side plate 230 , the total area of the blade 220 . can be enlarged or reduced.

As a result, since the double sloped impeller 200 according to this embodiment can configure the length of the blade 220 to be variable by the length adjusting unit, the air volume and pressure of the impeller can be adjusted.

Therefore, according to the double sloped impeller 200 according to this embodiment, the air volume and pressure can be adjusted as needed due to the variable length blade 220, so that various performances can be exhibited from the impeller of the same size without replacing the impeller. be able to

On the other hand, according to the double sloped impeller 200 according to the second embodiment of the present invention, as another example, the length adjustment part is not a configuration of the wrinkle member 221, but a sliding movement that moves in the upper or lower inner direction of the blade 220 It may include a blade (not shown).

The sliding blade is inserted into the blade 220 and can be moved forward and backward at the end of the blade 220 .

The effect of this sliding blade can be varied as needed and the air volume and pressure can be adjusted as needed, similarly to the length adjusting part composed of the above-mentioned corrugated member 221, so that various performances can be exhibited from the impeller of the same size without replacing the impeller. there will be

4 is a plan view schematically illustrating a double-leaved blade impeller according to a third embodiment of the present invention.

With reference to FIG. 4, the configuration and function of the double-edged blade impeller 300 according to the present embodiment will be described.

The double-slope impeller 300 according to the third embodiment of the present invention has the same configuration as the double-slope impeller 100 according to the first embodiment except for the configuration of the blade 320 .

Therefore, hereinafter, a detailed description of the same configuration as that of the double draft impeller 100 according to the first embodiment of the present invention will be omitted.

Referring to FIG. 4 , in the blade 320 of the double inclined blade impeller 300 according to the present embodiment, a plurality of double curved blades 321 and a plurality of linear blades 322 may be alternately arranged.

That is, the blade 320 may include a double curved blade 321 having a backward curved surface 321a and a backward forward curved surface 321b, and a linear blade 322 disposed spaced apart from the double curved blade 321. there is.

Here, the plurality of linear feathers 322 may be provided to have a single backward curved surface or a backward forward curved surface, unlike the double curved blade 321, for example, the backward backward curved surface 322a is formed from the inside as shown in the drawing. It may be formed and have a shape having a flat surface 322b extending in a straight line from the backward curved surface 322a. Alternatively, the linear blade 322 may have a straight plane without a curved surface.

As such, the blade 300 according to this embodiment increases the air volume and pressure by the double curved blade 321 as the double curved blade 321 and the linear blade 322 are alternately arranged, and the linear blade 322 ), the straightness of the fluid flow can be maintained.

Therefore, according to the double-edged blade impeller 300 according to the present embodiment, it is possible to improve the performance of the impeller while maintaining the stable rotational operation of the impeller.

FIG. 5 is a partially enlarged view schematically showing a double-slope impeller according to a fourth embodiment of the present invention, and is an enlarged view of part A of the double-slope impeller of FIG. 1 .

With reference to FIG. 5, the configuration and function of the double-edged blade impeller 400 according to the present embodiment will be described.

The double slanted impeller 400 according to the fourth embodiment of the present invention has the same configuration as the double slanted impeller 100 according to the first embodiment except for the configuration of the blade 420 .

Therefore, hereinafter, a detailed description of the same configuration as that of the double draft impeller 100 according to the first embodiment of the present invention will be omitted.

Referring to FIG. 5 , the blade 420 of the double-beveled impeller 400 according to the present embodiment has a first plane 421 , a backward curved surface 422 , a backward forward curved surface 423 , and a second plane 424 . ) can be included.

The first plane 421 may extend in a straight line from the edge side of the main plate 410 .

The backward curved surface 422 may be formed to extend in a direction opposite to the rotation direction of the main plate 410 from the rear end of the first plane 421 .

The forward-backward curved surface 423 may be formed to extend from the backward-backward curved surface 422 .

The second plane 424 may be formed to extend in a straight line from the rear end of the backward curved surface 423 , and the end may be positioned on the outer periphery of the main plate 410 .

As a result, since the blade 420 according to this embodiment has a plane in which one end and the other end respectively extend in a straight line, the fluid enters and exits in a straight straight flow to guide the flow of the fluid stably. Since a curved surface of a double gradient is formed between the two planes, it is possible to increase the air volume and pressure.

Therefore, according to the double sloping blade impeller 400 according to the present embodiment, it is possible to induce a stable flow of the fluid while increasing the air volume and pressure, thereby improving performance and maintaining stable rotation.

Figure 6 is a partial enlarged view schematically showing a double draft impeller according to a fifth embodiment of the present invention.

With reference to FIG. 6, the configuration and function of the double-edged blade impeller 500 according to the present embodiment will be described.

The double slanted impeller 500 according to the fifth embodiment of the present invention has the same configuration as the double slanted impeller 100 according to the first embodiment except for the configuration of the blade 520 .

Therefore, hereinafter, a detailed description of the same configuration as that of the double draft impeller 100 according to the first embodiment of the present invention will be omitted.

Referring to FIG. 6 , the blade 520 of the double draft impeller 500 according to the present embodiment may include a protrusion 521 formed to extend from the outer diameter end.

The protrusion 521 may be formed to extend outside the outer periphery of the main plate 510 or the side plate 530 from the outside of the blade 520 , and may extend in a straight line from the blade 520 .

The length at which the protrusion 521 deviates from the outer diameter of the main plate 510 or the side plate 530 may be set to a length of 1/50 to 1/200 of the total length of the blade 520, preferably approximately the total length. It can be set at a level of about 0.7 to 1.2%.

After all, according to the present embodiment, the blade 520 guides the flow of fluid so that the fluid guided through the blade 520 from the center according to the rotation of the impeller is kept straight at the end through the protrusion 521 and discharged. can do.

Therefore, according to the double sloping blade impeller 500 according to the present embodiment, it is possible to induce stable rotation of the impeller through the protrusion 521 of the blade 520 .

As described above, according to the impeller according to the present invention, the air volume and static pressure can be improved by 20% or more compared to the centrifugal blower using the conventional impeller made of a backward curved blade. This means that the double-slope centrifugal impeller shows the same performance even when the diameter, i.e. size, of the impeller is reduced compared to the conventional reverse curved blade centrifugal impeller. show that it can be produced. When the diameter of the impeller is reduced, all sizes of the centrifugal blower including the casing are reduced, so that the cost associated with manufacturing, transportation, or installation can be reduced, and thus excellent price competitiveness can be secured.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Accordingly, the embodiments disclosed in the present invention are for explanation rather than limiting the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments.

Therefore, the protection scope of the present invention should be interpreted by the following claims rather than being limited by the above-described embodiments, and all technical ideas within the equivalent range should be interpreted as being included in the scope of the present invention.

100: double-belt impeller
10: abacus 20: blade
30: side plate 40: inner ring
50: outer ring

Claims (5)

abacus having a rotating shaft;
a plurality of blades arranged to be spaced apart along the circumferential direction on one surface of the abacus and having a backward curved surface formed in a direction opposite to the rotational direction of the abacus and a backward forward curved surface extending from the backward curved surface;
a side plate spaced apart from the main plate and connected to the plurality of blades to form a suction port through which a fluid flows in a central portion; and
An outer ring disposed between the main plate and the side plate and connected to the outer diameter ends of the plurality of blades. According to claim 1,
The double inclined blade impeller further comprising an inner ring disposed between the main plate and the side plate and connected to the inner diameter ends of the plurality of blades. According to claim 1,
The plurality of blades,
Further comprising a length adjusting portion formed adjacent to the main plate or the side plate,
The length adjustment unit,
a pleated member extending from the blade; and
A double sloped impeller comprising a; an outer skin material coupled to the outside of the blade so as to surround the wrinkle member. According to claim 1,
a plurality of double curved feathers having the backward curved surface and the backward forward curved surface, and a plurality of linear feathers disposed to be spaced apart from the double curved blade,
A double-angled blade impeller in which the double curved blade and the linear blade are alternately arranged. According to claim 1,
The plurality of blades,
a first plane extending in a straight line from the front end of the backward curved surface; and
A double sloped blade impeller further comprising a; a second plane extending in a straight line from the rear end of the forward curved surface.

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