KR20180039548A - Centrifugal impeller having backward blades using dual gradient sectional shape type - Google Patents
Centrifugal impeller having backward blades using dual gradient sectional shape type Download PDFInfo
- Publication number
- KR20180039548A KR20180039548A KR1020170046446A KR20170046446A KR20180039548A KR 20180039548 A KR20180039548 A KR 20180039548A KR 1020170046446 A KR1020170046446 A KR 1020170046446A KR 20170046446 A KR20170046446 A KR 20170046446A KR 20180039548 A KR20180039548 A KR 20180039548A
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- KR
- South Korea
- Prior art keywords
- main plate
- impeller
- vane
- centrifugal impeller
- dividing point
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2216—Shape, geometry
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
- F04D29/242—Geometry, shape
- F04D29/245—Geometry, shape for special effects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a backward double-gentle-shaped vane centrifugal impeller, and more particularly, to a vane impeller having a double-edged cross- Thereby reducing the impact loss, improving the flow characteristics in the jet passageway, increasing the air volume to be generated, increasing the pressure at the impeller outlet, thereby improving the performance and reducing the noise A double backward-sloping cross-sectional shape feather-centrifugal impeller capable of reducing impeller construction cost and time due to a strong impeller structure due to the embossing effect of the feather section, .
Description
The present invention relates to a backwardly directed double-edged vane centrifugal impeller. More particularly, the present invention relates to a vane centrifugal impeller which is formed in a backward shape having a double gradient cross section with respect to a center line of a main plate, To improve the flow characteristics in the paddle passage, to increase the pressure at the outlet of the impeller, to improve the performance, thereby reducing the noise, and in the low airflow region, the surging phenomenon The present invention relates to a backwardly double-cross-section-shaped vane centrifugal impeller capable of reducing impeller manufacturing cost and time due to a strong impeller structure due to the embossing effect of the feather section,
Generally, an impeller is a main part of a pump, a blower or a compressor. The impeller is rotated with several pulleys arranged at equal intervals on a circumference, and a gas or fluid such as air, water or oil is connected to a shaft Energy is created when flowing through the feathers.
Normally, the feathers are divided into a centrifugal type and an axial flow type, and the centrifugal type feathers flow perpendicularly to the axis of rotation of the fluid or gas, and the axial flow of the fluid or gas flows in the direction of the rotation axis.
Here, the centrifugal impeller generates pressure while air is radially conveyed. Generally, as shown in Fig. 1, a backward-feather
The backward curved vane centrifugal impeller is a centrifugal impeller consisting of a vane having an impeller vane tilted backward with respect to the direction of rotation and having a convex surface in the form of a simple arc with respect to the direction of rotation:
The backward straight vane centrifugal impeller is a centrifugal impeller composed of a vane having an impeller vane tilted backward with respect to the rotational direction and having a flat plate surface with respect to the rotational direction,
The backward curve vane centrifugal impeller (a) is known to have superior efficiency and performance as compared to the backward straight vane centrifugal impeller (b).
The shape of the arc of the backward curved feather is determined by the outer diameter D2 of the impeller outlet, the inner diameter D1 of the impeller inlet, the impeller inlet feather angle? 1 and the impeller outlet feather angle? 2, (D1 / D2). When the ratio is small, the arc becomes convex, and when the ratio is large, the arc is flattened close to the linear shape.
However, in the case of a backward curved centrifugal impeller used for air conditioning, since the diameter ratio (D1 / D2) is large, the arcuate shape of the feather is not kept convex, .
Therefore, centrifugal impellers (a) and (b) with a backward feather are disadvantageous in that they are difficult to use in the case of a centrifugal blower for air conditioning, which requires a large amount of air, and therefore the forward and backward centrifugal impellers .
However, due to the low efficiency and the low number of revolutions of the impeller, the pressure and air flow generated by the forward full throttle centrifugal impeller are increased compared to the backward thrust. And a surging phenomenon occurs in a low air volume region. Here, the surging phenomenon may cause the impeller to vibrate, resulting in the breakage of the rotating shaft.
SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a double- To reduce the impact loss at the entrance of the centrifugal impeller, to improve the flow characteristics in the jet passageway, and to increase the jet angle at the outlet of the impeller to generate a large pressure, The noise is reduced, the surging phenomenon does not occur in the low airflow region, the number of the floats is small and the cost and time for manufacturing the impeller can be saved. By adopting the direct coupling type and simplifying the power transmitting device, The present invention relates to a centrifugal centrifugal impeller, and more particularly,
In addition, the impeller structure is strong due to the embossing effect of the feather section compared with the conventional backward-facing flap having a flat cross-section, the high speed rotation is possible, the cost and time required for manufacturing the centrifugal impeller are not added, Another object of the present invention is to provide a backward double-edged cross-sectional centrifugal impeller capable of reducing the manufacturing cost and time of a centrifugal blower or a pump by simplifying a power transmitting device.
In order to solve the above-mentioned problems, the present invention provides a method of manufacturing a semiconductor device, comprising: a main plate (20) having a rotation shaft (10) fixed to the center thereof and rotated about the rotation axis; A plurality of circumferentially spaced apart grooves are formed on one surface of the
As described above, the present invention is characterized in that a collar provided on the main plate is curved in the same direction as the rotation direction of the
In addition, due to the embossing effect of the feather section, the impeller structure is strong and the number of floats is small, which can save the cost and time of impeller manufacturing. By adopting the direct coupling type and simplifying the power transmission device, There is an effect that time can be saved.
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view of a conventional backward curved vane centrifugal impeller and a backward vane centrifugal impeller.
2 is a schematic view of a backward dual gradient, cross-shaped vane centrifugal impeller according to an embodiment of the present invention.
Figure 3 is an enlarged view of a backward dual-gradient cross-sectional vane centrifugal impeller according to an embodiment of the present invention.
FIG. 4 is an exemplary view showing the formation of a feather with multiple center-points in a backward-directed dual-gradient cross-sectional centrifugal impeller according to an embodiment of the present invention; FIG.
FIG. 5 is a graph showing the pressure coefficient of a backward double-edged cross-sectional centrifugal impeller according to an embodiment of the present invention. FIG.
FIG. 6 is a graph illustrating the efficiency of a backward dual-gradient cross-sectional vane centrifugal impeller according to an embodiment of the present invention.
Before describing in detail several embodiments of the invention, it will be appreciated that the application is not limited to the details of construction and arrangement of components set forth in the following detailed description or illustrated in the drawings. The invention may be embodied and carried out in other embodiments and carried out in various ways. It should also be noted that the device or element orientation (e.g., "front," "back," "up," "down," "top," "bottom, Expressions and predicates used herein for terms such as "left," " right, "" lateral, " and the like are used merely to simplify the description of the present invention, Or that the element has to have a particular orientation. Also, terms such as " first "and" second "are used herein for the purpose of the description and the appended claims, and are not intended to indicate or imply their relative importance or purpose.
The present invention has the following features in order to achieve the above object.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.
Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.
According to an embodiment of the present invention,
A
The
The
The
The
The shape of the
The
In addition, the shape of the curve of the
The dividing point D extends from the one end A of the
It is also characterized in that it is used for a blower or a pump.
Hereinafter, a backward double-gentle-shaped cross-sectional centrifugal impeller according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 2 to 6. FIG.
The backward double gradient cross-sectional vane centrifugal impeller according to the present invention is as follows.
FIG. 2 is a schematic view showing a backward double-gentle-shaped cross-sectional centrifugal impeller according to an embodiment of the present invention, FIG. 3 is an enlarged view showing a backward double- 4 is a view illustrating an example in which a feather is formed with multiple center points in a backward dual gradient cross-sectional centrifugal impeller according to an embodiment of the present invention, and FIG. 5 is a cross- FIG. 6 is a graph showing the efficiency of a backward dual-gradient cross-sectional vane centrifugal impeller according to an embodiment of the present invention.
As shown in Figs. 2 to 6, the backward double-gradient cross-sectional impeller of the present invention comprises a
2, one side of the
As shown in FIGS. 2 and 3, the
3, the inner circumferential
That is, the inner circumferential
As shown in Figs. 2 to 3, the
3, the
One end portion A of the
As shown in FIG. 3, the
Of course, according to one embodiment, the one end A of the
As shown in FIG. 3, the shape of such a feather is a curved shape between an 'A' point and a dividing point 'D' which is one end of the
In addition, the
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various changes and modifications may be made without departing from the scope of the appended claims.
10: rotating shaft 20: abacus
21: inner diameter abacus plate 22: outer diameter abacus plate
30: collar 40: shroud
50: Centrifugal impeller
Claims (10)
A plurality of circumferentially spaced apart main plates 20 are formed on one surface of the main plate 20 so as to rotate the main plate 20 and transfer the fluid to one side,
And one side in the longitudinal direction is bent in the same direction as the rotation direction of the main plate 20 and is formed as a back curve in the future, while the other side in the longitudinal direction is rotated (30) having a rearwardly directed double-curved cross-sectional shape in which a rearward full-bending curve is bent continuously in a direction opposite to a direction of the backward bending;
The one end A of the main plate 20 is connected and fixed to the outer circumference of the main plate 20 so that the shape of the centrifugal impeller can be maintained A side plate (40);
And a backwardly directed double-edged cross-section vane centrifugal impeller.
The collar (30)
Is formed to be inclined backward in a direction opposite to the rotation of the main plate (20) with reference to a center line (L) connecting the center of the rotation axis (10) of the main plate (20) Cross section impeller centrifugal impeller.
The main plate (20)
An inner circumferential main plate (21) located inside the side plate (40) to which one end (A) of the collar (30) is connected;
An outer circumferential main plate 22 contacting one longitudinal side surface of the vowel 30 and extending to the other end B of the vowel 30;
And a backwardly directed double-edged cross-section vane centrifugal impeller.
The collar (30)
The one end portion A and the other end portion B are connected by a straight line L1 so that the straight line L1 is set to the length of the vowel 30, By setting the point D,
A curve is formed in which an opposite gradient is formed between the one end A and the dividing point D and between the dividing point D and the other end B with respect to the dividing point D Wherein the backwardly directed double-edged cross-sectional vane centrifugal impeller.
The collar (30)
Depending on the position of the other end B positioned so as to coincide with the outermost circumference of the outer circumferential main plate 22,
An impeller outlet angle? 2 formed by a straight line L1, a vertically extending line of the other end B of the vane 30 and an outermost tangent of the outer circumferential main plate 22, a tangent of the impeller 30, And the impeller inlet feather angle beta 1 formed by the vertical extension line of the one end portion A of the impeller inlet edge portion A is changed.
The shape of the vane 30
Depending on the position of the other end B and the position of the dividing point D,
An impeller outlet feather angle? 2 formed by the length of the vanes 30, the vertical extension line of the other end portion B of the vane 30 and the outermost tangent line of the outer diameter main plate 22, the tangent of the side plate 40, (1) formed by a vertical extension line of one end portion (A) of the rotor (30) is changed, and the performance of the centrifugal impeller is changed.
The collar (30)
According to the shape of the curve formed at one end A and the dividing point D and in the section between the dividing point D and the other end B with respect to the dividing point D,
An impeller exit edge angle? 2 formed by a vertical extension line of the other end portion B of the collar 30 and an outermost tangent line of the outer diameter main plate 22, a tangent of the side plate 40 and one end portion A) an impeller inlet jet angle (? 1) formed by a vertical extension line is changed, and the performance of the centrifugal impeller is changed.
The shape of the curve of the vane 30
A curved line with a single center point, or a curve with multiple center points.
One end (A) of the vane 30 and a section of the dividing point (D)
And the dividing point (D) extends to the other end (B) of the feather.
Characterized in that it is used for blowers or pumps.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR20160130776 | 2016-10-10 | ||
KR1020160130776 | 2016-10-10 |
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KR20180039548A true KR20180039548A (en) | 2018-04-18 |
KR101913147B1 KR101913147B1 (en) | 2018-10-30 |
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KR1020170046446A KR101913147B1 (en) | 2016-10-10 | 2017-04-11 | Centrifugal impeller having backward blades using dual gradient sectional shape type |
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KR (1) | KR101913147B1 (en) |
WO (1) | WO2018070643A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20210105653A (en) * | 2020-02-19 | 2021-08-27 | 소애연 | Turbo type airfoil section blade having forward curved vane |
KR20220032333A (en) * | 2020-09-07 | 2022-03-15 | 대륜산업 주식회사 | Impeller with double gadient blade |
CN114810660A (en) * | 2022-04-15 | 2022-07-29 | 祁华意 | Environment-friendly energy-saving ventilation/air exchange device |
KR102671477B1 (en) * | 2023-09-06 | 2024-05-31 | 주식회사 한성시스코 | Turbo fan for air conditioner |
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EP3748236A1 (en) * | 2019-06-07 | 2020-12-09 | Esse 3 S.r.l. | Fan apparatus suitable for being used in a domestic extractor |
IT201900010632A1 (en) * | 2019-07-02 | 2021-01-02 | Dab Pumps Spa | IMPELLER PERFECTED FOR CENTRIFUGAL PUMP, ESPECIALLY FOR PUMP WITH RETRACTABLE IMPELLER TYPE, AND PUMP WITH A SIMILAR IMPELLER |
CN113738693A (en) * | 2021-10-11 | 2021-12-03 | 东莞市深鹏电子有限公司 | Water pump impeller and drainage pump using same |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR200276584Y1 (en) * | 2002-02-21 | 2002-05-24 | 경진부로아 주식회사 | Impeller having blades of an improved shape for a centrifugal blower |
US20040156717A1 (en) * | 2002-12-02 | 2004-08-12 | Volvo Lastvagnar Ab | Centrifugal pump |
KR100588806B1 (en) * | 2004-05-11 | 2006-06-09 | 정성규 | An impeller for a blower |
JP4670285B2 (en) * | 2004-09-02 | 2011-04-13 | パナソニック株式会社 | Impeller and blower fan having the same |
KR20150137483A (en) * | 2014-05-29 | 2015-12-09 | 한국에너지기술연구원 | Centrifugal impeller having backward airfoil suction surface type |
KR101672260B1 (en) * | 2014-09-12 | 2016-11-03 | 한국에너지기술연구원 | Centrifugal impeller having backward twisted blades |
-
2017
- 2017-04-11 KR KR1020170046446A patent/KR101913147B1/en active IP Right Grant
- 2017-07-06 WO PCT/KR2017/007243 patent/WO2018070643A1/en active Application Filing
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20210105653A (en) * | 2020-02-19 | 2021-08-27 | 소애연 | Turbo type airfoil section blade having forward curved vane |
KR20220032333A (en) * | 2020-09-07 | 2022-03-15 | 대륜산업 주식회사 | Impeller with double gadient blade |
CN114810660A (en) * | 2022-04-15 | 2022-07-29 | 祁华意 | Environment-friendly energy-saving ventilation/air exchange device |
CN114810660B (en) * | 2022-04-15 | 2024-04-30 | 深圳市卓尔智能技术有限公司 | Environment-friendly energy-saving ventilation device |
KR102671477B1 (en) * | 2023-09-06 | 2024-05-31 | 주식회사 한성시스코 | Turbo fan for air conditioner |
Also Published As
Publication number | Publication date |
---|---|
WO2018070643A1 (en) | 2018-04-19 |
KR101913147B1 (en) | 2018-10-30 |
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