WO2012115452A2 - 원통형 베인을 포함하는 임펠러 - Google Patents
원통형 베인을 포함하는 임펠러 Download PDFInfo
- Publication number
- WO2012115452A2 WO2012115452A2 PCT/KR2012/001362 KR2012001362W WO2012115452A2 WO 2012115452 A2 WO2012115452 A2 WO 2012115452A2 KR 2012001362 W KR2012001362 W KR 2012001362W WO 2012115452 A2 WO2012115452 A2 WO 2012115452A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- impeller
- vanes
- base plate
- vane
- inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- 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
- F04D29/2238—Special flow patterns
- F04D29/225—Channel wheels, e.g. one blade or one flow channel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/04—Helico-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
- F04D29/007—Details, component parts, or accessories especially adapted for liquid 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
- F04D29/2238—Special flow patterns
- F04D29/2255—Special flow patterns flow-channels with a special cross-section contour, e.g. ejecting, throttling or diffusing effect
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2210/00—Working fluids
- F05D2210/10—Kind or type
- F05D2210/11—Kind or type liquid, i.e. incompressible
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S415/00—Rotary kinetic fluid motors or pumps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S416/00—Fluid reaction surfaces, i.e. impellers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S417/00—Pumps
Definitions
- the present invention relates to an impeller, and more particularly, a plurality of hollow vanes are formed spirally in one direction from the center of the base plate, and the fluid flowing into the hollow housing is introduced into the inlet by rotation of the impeller.
- the introduced fluid flows into the inlets of the plurality of vanes formed at the center of the base plate and is discharged to the outlets, thereby minimizing friction with the fluid, and at the same time, the impeller including the cylindrical vanes capable of maximizing pump lift and efficiency.
- the inlet and outlet angles of the vanes are mainly determined by the shape or empirical aspect of the meandering surface, and the sweep angle related to the vane length is designed by smoothly connecting the defined inlet / outlet angles. It is mainly included in the values determined rather than the important variables of the design.
- the impeller shape can be expressed by the vane development using information on the meridian surface and the front surface.
- the design variables of the meridion plane and wing development chart representing the impeller three-dimensional shape are very numerous, and analyzing how these design variables affect the centrifugal pump performance establishes the pump design technology. This is a very important process.
- Conventional impeller is composed of a base plate, a side plate, a vane and a rotating shaft, by rotating the rotating shaft is the fluid is sucked into the inlet, discharged to the impeller outlet through a passage formed by the base plate, the side plate and the vane to apply energy to the fluid.
- the vanes of the impeller are connected between the base plate and the side plate and the vanes of the plurality of impellers are arranged radially and the vanes of each impeller are formed while bending at a constant angle.
- the vanes of the curved impeller have concave surfaces curved inwardly and convexly curved outwards.
- the concave concave surface is formed with a lower pressure of the fluid than the convex surface.
- the impeller Since the impeller has a limited number of vanes and the fluid is viscous, the relative velocity at the impeller exit varies due to friction in the vane passage, separation of the flow, and so on. As the number of silver vanes decreases, there is a big difference from the vane exit angle.
- the sliding speed is generated at the impeller exit, and the sliding speed is generated in the opposite direction to the impeller rotation direction, which causes a decrease in the pressure head of the impeller, and as the sliding speed increases, the main speed is generated to generate the same pressure. Because of the increase in the performance and utility of the impeller is reduced.
- Impairment of the impeller results in an increase in the axial force for driving the impeller and a decrease in the utility.
- the removal of some of these factors provides the possibility of improving the performance of the impeller.
- the flow in the vane passage is generally reduced even if the static pressure decreases at the side plate inlet because the difference between the radius of curvature of the side plate and the radius of curvature of the base plate is small and the vane passage is long. This is accelerated without occurrence, so that despite the pressure gradient in the vane passage where the reverse pressure gradient is largely formed, the flow does not peel off at the side plate inlet.
- the accelerated flow at the side plate inlet is greatly decelerated when reaching the impeller outlet because the difference between the radius of curvature of the side plate and the radius of curvature of the abacus is large and the vane passage is short.
- the velocity distribution at is discharged with the side plate inlet increased significantly compared to the base plate inlet.
- the impeller 1 shown in FIG. 1 has a boss 2 serving as a passage through which fluid is first introduced, an upper plate 3 integrally formed with the lower part of the boss 2 to support the lower part of the boss 2, A base plate 4 positioned below the upper plate 3 and a plurality of vanes 5 spirally formed on the upper surface of the upper plate 3 are included.
- the impeller 1 is formed with a wall at regular intervals in the vertical direction of the upper plate 3 and the base plate 4 so that the fluid introduced into the boss 2 is discharged into the space between the wall and the wall.
- the cross-sectional area of the space formed between the upper plate 3, the base plate 4 and the wall is formed in a square shape, there is a problem that a vortex phenomenon occurs at an angled corner portion.
- the conventional impeller 1 has a loss of energy due to the friction loss caused by the fluid that does not enter the boss 2 when the fluid is introduced into the impeller 1 hits the top plate (3) Will lead to
- An object of the present invention for solving the above problems is formed a plurality of hollow vanes are formed spirally in one direction from the center of the base plate is the fluid flowing into the hollow housing is introduced into the inlet by the rotation of the impeller Inflow fluid is introduced into the inlet of the plurality of vanes formed in the center of the base plate is discharged to the outlet to minimize the friction with the fluid and at the same time pump impeller including a cylindrical vane that can maximize the lift and efficiency of the pump To provide.
- an object of the present invention is a cylindrical that can minimize the friction loss between the fluid flowing outside the inlet as the outer peripheral surface of any one of the plurality of vanes and the outer peripheral surface of the other vanes adjacent to any one vane is spaced apart It is to provide an impeller containing a vane.
- Impeller including a cylindrical vane according to the present invention for solving the above problems is inlet; And a vane having a hollow shape, wherein the inlet of the vane communicates with the inlet, and the fluid passing through the inlet flows out through the outlet of the vane, and the cross section of the vane is circular or elliptical and the outlet at the inlet. It is characterized by a gradual increase towards.
- the impeller further comprises a base plate integral with the vane, and the base plate is characterized in that for supporting one surface of the outer peripheral surface of the vane.
- the base plate, the vane and the inlet is characterized in that formed integrally.
- the outer circumferential surface of any one of the plurality of vanes is spaced apart from the outer circumferential surface of the other vane adjacent to the any one vane.
- the base plate is characterized in that it further comprises a vertex formed on top of the base plate.
- the present invention has a plurality of hollow vanes which are formed spirally in one direction from the center of the base plate, so that fluid flows therein to minimize friction with the fluid and at the same time maximize pump lift and efficiency. The effect may occur.
- the base plate supports the one surface of the outer circumferential surface of the vane.
- the present invention is the base plate, the vane and the inlet is formed integrally there is an effect that can give a structural stability.
- the present invention has the effect of smoothing the flow of the fluid flowing into the inlet as the vertex is formed on the upper portion of the base plate.
- FIG. 1 is a perspective view in one direction of a conventional impeller
- Figure 2 is a cross-sectional view in one direction of the pump for aiding the understanding of the impeller including a cylindrical vane according to an embodiment of the present invention
- FIG 3 is a perspective view in one direction of an impeller including a cylindrical vane according to an embodiment of the present invention.
- the above-described field of application of the present invention relates to a pump (particularly, a centrifugal pump), which is a representative fluid machine that converts mechanical energy into pressure and kinetic energy of a fluid through an impeller rotating under external power.
- a centrifugal pump has a great effect on pump performance, such as pump lift, efficiency, and axial power, depending on the number of impeller vanes, shape changes, and rotational speeds.
- cross-sectional cross-sectional area' in the present invention means the cross-sectional area in the vertical direction of the advancing direction of the fluid flowing into the vane throughout the specification.
- longitudinal cross-sectional area means the cross-sectional area of the flow direction of the fluid flowing into the vane throughout the specification.
- Essential components for helping and understanding the impeller 100 including the cylindrical vane according to an embodiment of the present invention are as follows.
- the housing 10 forms an external shape of the pump, and allows the pump-type impeller 100 including the cylinder vane according to the present invention to be located inside one side of the housing 10.
- a housing 10 should be able to withstand even if the pump-type impeller 100 including the cylinder vane rotates quickly by the operation of the motor 30 to be described later, it is preferable to use a material having a high strength, the cylinder vane It is preferable to use a material having high corrosion resistance and abrasion resistance to withstand the friction caused by the hydraulic pressure and fluid movement caused by the rotation of the pump-type impeller 100 including.
- the rotating shaft 20 is fastened to the lower center of the impeller 100 including the cylindrical vanes.
- the rotating shaft 20 serves to transmit the rotational force of the motor 30 to be described later to the impeller 100.
- the motor 30 transmits a rotational force to the rotation shaft 20 to allow the impeller 100 including the cylindrical vanes to rotate.
- the impeller 100 including the cylindrical vanes according to the present invention includes a base plate 101, a water inlet 102 through which fluid is first introduced, a plurality of vanes 104a, 104b, 104c, 104d, which are connected to the base plate 101. 104e), a plurality of vanes 104a, 104b, 104c, 104d, 104e and a plurality of inlets 105a, 105b, 105c, 105d, 105e and a plurality of vanes 104a, 104b, 104c, 104d, 104e And a plurality of outlets 106a, 106b, 106c, 106d, and 106e formed on the other side.
- the base plate 101 serves to support the plurality of vanes 104a, 104b, 104c, 104d, 104e, and the base plate 101 includes vertices 103.
- the inlet 102 is formed of a cylinder open in the vertical direction, the inlet 102 serves as a passage so that the fluid can be introduced for the first time.
- the vertex 103 is formed at the top center of the base plate 101. This vertex 103 serves to direct the fluid to the plurality of vanes 104a, 104b, 104c, 104d, 104e by minimizing frictional force with the fluid flowing through the inlet 102.
- a plurality of vanes (104a, 104b, 104c, 104d, 104e) is formed of a cylindrical tube, bent in one direction, in particular bent in the same direction as the rotation direction of the rotation shaft 20 and the motor 30 It may be desirable. This is because minimizing friction with the fluid results in an effect of increasing the efficiency of the pump.
- the cross-sections of the plurality of vanes 104a, 104b, 104c, 104d, 104e are formed in a circular or elliptical shape but gradually increase from the inlet toward the outlet.
- the cross-sectional area is formed in a square may cause a loss of axial force due to the vortex phenomenon in the angled portion, in the present invention as described above
- the plurality of vanes 104a, 104b, 104c, 104d, and 104e serve as a passage through which the fluid flowing through the inlet 102 passes, and the inlets 105a, 105b, 105c, 105d, and 105e and the outlet ( 106a, 106b, 106c, 106d, 106e).
- the plurality of inlets 105a, 105b, 105c, 105d, and 105e are positioned at the center of the base plate 101 and are formed at one side of the plurality of vanes 104a, 104b, 104c, 104d and 104e.
- the plurality of inlets 105a, 105b, 105c, 105d, and 105e allow the fluid flowing from the inlet 102 to enter the plurality of vanes 104a, 104b, 104c, 104d and 104e.
- the plurality of outlets 106a, 106b, 106c, 106d, and 106e are located at the outer side of the base plate 101, and are formed on the other side of the plurality of vanes 104a, 104b, 104c, 104d, and 104e.
- the plurality of outlets 106a, 106b, 106c, 106d, and 106e serve to discharge the fluid flowing into the plurality of inlets 105a, 105b, 105c, 105d, and 105e to the outside.
- the plurality of vanes 104a, 104b, 104c, 104d, 104e, the plurality of inlets 105a, 105b, 105c, 105d, 105e and the plurality of outlets 106a, 106b, 106c, 106d, 106e described above are As shown in FIG. 2, but each is formed of five, the discharge flow rate, head and pump efficiency may vary depending on the number of vanes, so the user can change the number of vanes to an appropriate number according to the purpose and application.
- the impeller 100 including the cylindrical vanes rotates together with the rotation shaft 20 by the operation of the motor 30.
- the fluid flowing through the inlet 102 is introduced into the plurality of inlets (105a, 105b, 105c, 105d, 105e) by rotating the impeller 100 including the cylindrical vanes, a plurality of vanes (104a, 104b, It passes through the 104c, 104d, 104e and is finally discharged to the outside through a plurality of outlets (106a, 106b, 106c, 106d, 106e).
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- 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
Description
Claims (5)
- 입수구(102); 및원통형의 관으로 형성되되, 일방향으로 구부러지게 형성되는 베인(104a, 104b, 104c, 104d, 104e);을 포함하고,상기 베인(104a, 104b, 104c, 104d, 104e)의 유입구(105a, 105b, 105c, 105d, 105e)가 상기 입수구(102)와 연통함으로써 상기 입수구(102)를 통과한 유체가 상기 베인(104a, 104b, 104c, 104d, 104e)의 유출구(106a, 106b, 106c, 106d, 106e)를 통해 유출되고, 그리고상기 베인(104a, 104b, 104c, 104d, 104e)의 단면은 원형 또는 타원형이며 상기 베인(104a, 104b, 104c, 104d, 104e)의 횡방향 단면적은 상기 유입구(105a, 105b, 105c, 105d, 105e)에서 상기 유출구(106a, 106b, 106c, 106d, 106e)를 향하여 점진적으로 증가하는 것을 특징으로 하는,임펠러(100).
- 제 1 항에 있어서,상기 임펠러(100)는 상기 베인(104a, 104b, 104c, 104d, 104e)과 일체형인 베이스판(101)을 더 포함하고, 그리고상기 베이스판(101)은 상기 베인(104a, 104b, 104c, 104d, 104e)의 외주면의 일면을 지지하는 것을 특징으로 하는,임펠러(100).
- 제 2 항에 있어서,상기 베이스판(101), 상기 베인(104a, 104b, 104c, 104d, 104e) 및 상기 유입구(105a, 105b, 105c, 105d, 105e)는 일체로 형성되는 것을 특징으로 하는,임펠러(100).
- 제 1 항 내지 제 3 항 중 어느 한 항에 있어서,상기 다수의 베인(104a, 104b, 104c, 104d, 104e) 중 어느 하나의 베인의 외주면과 상기 어느 하나의 베인에 인접한 다른 하나의 베인의 외주면이 이격되는 것을 특징으로 하는,임펠러(100).
- 제 3 항에 있어서,상기 베이스판(101)은 상기 베이스판(101)의 상부에 형성되는 꼭지점(103)을 더 포함하는 것을 특징으로 하는,임펠러(100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2012221969A AU2012221969A1 (en) | 2011-02-22 | 2012-02-22 | Impeller having cylindrical vanes |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2011-0015498 | 2011-02-22 | ||
| KR1020110015498A KR101070136B1 (ko) | 2011-02-22 | 2011-02-22 | 원통형 베인을 포함하는 임펠러 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2012115452A2 true WO2012115452A2 (ko) | 2012-08-30 |
| WO2012115452A3 WO2012115452A3 (ko) | 2012-12-13 |
Family
ID=45032290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2012/001362 Ceased WO2012115452A2 (ko) | 2011-02-22 | 2012-02-22 | 원통형 베인을 포함하는 임펠러 |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR101070136B1 (ko) |
| AU (1) | AU2012221969A1 (ko) |
| WO (1) | WO2012115452A2 (ko) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2984348A4 (en) * | 2013-04-10 | 2016-11-16 | Weir Minerals Australia Ltd | PUMP ROTOR |
| EP2930367B1 (en) * | 2013-07-05 | 2020-05-27 | Ebara Corporation | Pump blade for submerged pump and submerged pump having same |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101257945B1 (ko) | 2011-11-03 | 2013-04-23 | 삼성테크윈 주식회사 | 베인 디퓨져를 구비한 원심 압축기 구조 |
| KR101826819B1 (ko) * | 2017-06-08 | 2018-02-07 | 이재웅 | 원심 슬러리 펌프 및 임펠러 |
| KR102041251B1 (ko) * | 2018-02-01 | 2019-11-06 | 이재웅 | 원심 펌프용 임펠러 및 원심 펌프 |
| EP3798453A1 (de) * | 2019-09-26 | 2021-03-31 | Siemens Aktiengesellschaft | Strömungsführung einer radialturbomaschine, rückführstufe, radialturbomaschine, verfahren zur herstellung |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3790101B2 (ja) * | 1998-04-24 | 2006-06-28 | 株式会社荏原製作所 | 斜流ポンプ |
| KR20090002529A (ko) * | 2007-06-30 | 2009-01-09 | 박철순 | 진동저감 및 흡입효과가 개선된 임펠러 구조 |
| DK2218917T3 (da) * | 2009-02-12 | 2013-07-08 | Ebm Papst Mulfingen Gmbh & Co | Radial- eller diagonal-ventilatorhjul |
-
2011
- 2011-02-22 KR KR1020110015498A patent/KR101070136B1/ko not_active Expired - Fee Related
-
2012
- 2012-02-22 WO PCT/KR2012/001362 patent/WO2012115452A2/ko not_active Ceased
- 2012-02-22 AU AU2012221969A patent/AU2012221969A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2984348A4 (en) * | 2013-04-10 | 2016-11-16 | Weir Minerals Australia Ltd | PUMP ROTOR |
| EP2930367B1 (en) * | 2013-07-05 | 2020-05-27 | Ebara Corporation | Pump blade for submerged pump and submerged pump having same |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101070136B1 (ko) | 2011-10-05 |
| AU2012221969A1 (en) | 2014-03-20 |
| WO2012115452A3 (ko) | 2012-12-13 |
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