EP0733805B1 - Faserabweisende Wandflächengestaltung - Google Patents
Faserabweisende Wandflächengestaltung Download PDFInfo
- Publication number
- EP0733805B1 EP0733805B1 EP96102053A EP96102053A EP0733805B1 EP 0733805 B1 EP0733805 B1 EP 0733805B1 EP 96102053 A EP96102053 A EP 96102053A EP 96102053 A EP96102053 A EP 96102053A EP 0733805 B1 EP0733805 B1 EP 0733805B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- recesses
- centrifugal pump
- recess
- pump according
- guide
- 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.)
- Expired - Lifetime
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
- F04D3/00—Axial-flow pumps
- F04D3/005—Axial-flow pumps with a conventional single stage rotor
-
- 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
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/528—Casings; Connections of working fluid for axial pumps 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/548—Specially 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
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
-
- 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
- Y10S415/914—Device to control boundary layer
Definitions
- the invention relates to a centrifugal pump according to the features in the preamble of Main claim.
- Centrifugal pumps equipped with a propeller mainly have an axial one Flow direction up, but partly also semi-axial propellers corresponding flow direction common.
- Such centrifugal pumps are susceptible to foreign substances in the medium, preferably foreign substances in the form of fibrous components. This problem was solved very early the DE-PS 501 662 tries to eliminate. This was done through stakes or by means of Grooves formed in the housing cutting edges. With their help, fibrous Components are stripped from the ends of the propeller blades.
- FR-A-2 279 954 shows a solution, the one special pump design required.
- the propeller shaft load-bearing hub passed through an intake manifold on the inlet side.
- the guide vanes downstream of the propeller are then attached as one-sided, free-standing ribs are formed.
- the leading edge of these free-standing guide ribs run inclined in the direction of flow and fibers catching on it are flushed into the free center of the flow cross-section and flow there unhindered.
- That kind of Buckets that use the principle of FR-A-2 279 954 constitute one additional blocking of the stator cross-section and can be unfavorable Operating conditions as a result of vibrational stress at breakage free-standing rib. In addition, they only partially offer security against constipation, since fibers continue to adhere to the actual guide vanes can accumulate.
- the invention is based on the problem of developing a stator design which when loaded with a conveying medium containing fibrous components Clogging of the stator is prevented.
- Deepening in the housing is achieved that on the inclined guide vane edges accumulating and sliding fibers along the free-standing blade part slide away and get into the recess. Above the stator leading edge the deepening creates a local vortex area by enlarging the cross-section, which has a lifting effect on the fibrous components. With help This vortex keeps the fibers in suspension in the well. The adjacent flow in the stator channel in the area of the wall surfaces of the blades then exerts a transporting effect on the fibers within the recess out. To a certain extent, the recess, which also acts as a kind of case pocket can be viewed, specifically produces a dead water that is local Backflow area represents. As a result of this local backflow area ensures that the usually pressing effect of the dynamic pressure on the Fibers in the area of the transition from the stator to the housing between Guide vane and housing is lifted.
- Claims 2 to 8 describe further advantageous refinements of Invention.
- the shape of a recess which also functions as a pocket can be viewed, which is described in claims 2 and 3, enables easy removal of the fiber along the leading edge of the vane and over the free-standing blade edge into the room of the Slide in the depression. From there they will be in the space between two Removed guide vanes. To reinforce this effect, the edges the depression in the suction-side flow space of the guide vane opposite the Sloping housing. As a result, there is no dead water area here removal effect is enhanced.
- An elongated course of the deepening and also the oblique course of the depression with respect to the plane of rotation of the Propellers cause fibers that get stuck in the recess flow is asymmetrical.
- the existing channel cross section Current in connection with the fiber-dissolving effect of dead water a removal of the fibers in the channel space between neighboring Guide vanes.
- rounded transitions prevent the area between guide vane, recess and / or housing wall surface the formation of sharp edges or corners. This will pinch fibrous Components prevented. Between the blades and the housing side walls there are smooth transitions, with corresponding transitions also in the area between the recess and the guide vane.
- a centrifugal pump is shown, in the housing 1, an impeller in Form of a propeller 2 rotates, with the pump flowing in the axial direction becomes.
- the invention is not limited to this direction of flow, it can also be used for a semi-axial flow direction.
- the hub 3 being supported by guide vanes 4 is positioned within the housing 1.
- the leading edges 5 of the guide vanes 4 are swept back or starting from the hub in the direction of flow leaning back.
- Guide vanes 4 protrude freely.
- stator leading edges adhering fibrous components Due to the inclination of the stator leading edges adhering fibrous components as a result of the flow acting on it slide along and over the free-standing stator leading edge 7 into the recess 6 slide.
- the inclination can vary according to the flow conditions in the stator also run in a different direction and shape than shown.
- the fibers At forward swept leading edges 5, the fibers would be guided to the hub 3.
- the Well would then be arranged in the hub 3.
- the recesses 6 form, so to speak, dead water, with those located therein Backflows cause turbulence, due to which the fibrous Components are kept in suspension within a recess 6. That area of the guide vanes 4 that is behind one in the flow direction Recess 6 is located, has transitions 8, which are thickened profiles are to be seen. This creates sharp-edged transitions between guide vane 4 and housing 1 avoided. In the worst case, sharp-edged transitions could sticking of the fibrous components.
- FIG. 3 corresponds to section B-B shown in FIG. 1. It contains one further cutting line C-C, the bottom surface 12 of the recess 6 to a certain extent cuts off. Due to this course of the cut, the depression is shown in FIG Opening can be shown.
- the inclination of the side walls 11 of the recess 6 are executed according to the flow direction of the medium. This allows a targeted influence on the removal of fibrous components from the Recess 6. Thus, backflow vortices can form within the depression their lifting effect on the fibrous in the recess Exercise components and enable trouble-free pump operation.
- Fig. 4 shows a section of a stator and corresponds to section C-C of Fig. 3. It is a top view of one equipped with a recess Guide vane 4 shown. The selected course of the cut provides a look through the Indentation 6 possible on the associated guide vane.
- the housing 1 and the hub 3 are only shown as cutouts. Show the arrows the course of the flow on both sides of the blade 4, above the free-standing Stator leading edge 7, on the thickenings 8, 9 and in the region of the recess 6 on. An overflow from the pressure side to takes place within the depression 6 Suction side of the guide vane instead.
- a spatial representation using grid surfaces is the Course of a recess 6 and its position relative to a leading-edge leading edge 5, 7 recognizable.
- the deepening 6 was analogous to Section C-C is open and the rounding is omitted.
- the slant or the asymmetrical assignment of recess 6 and guide vane 4 favors the lifting effect for the fibers in the region of the recess 6.
- the Guide blades are optimally designed in hydraulic terms and do not need more, as is also known, with flow-poor thickening in the area their leading edges 5 are designed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Laminated Bodies (AREA)
Description
- Fig. 1
- einen Meridianschnitt mit Meridionalprojektion der Schaufeln, die
- Fig. 2
- einen Schnitt gemäß Linie AA aus Fig. 1, die
- Fig. 3
- einen Schnitt gemäß Linie BB von Fig. 1, die
- Fig. 4
- einen Schnitt gemäß Linie CC von Fig. 3 und die
- Fig. 5
- eine räumliche Darstellung mit Hilfe von Gitternetzlinien.
Claims (9)
- Kreiselpumpe, mit einem innerhalb eines Gehäuses angeordneten Propeller sowie dem Propeller nachgeordneten Leitschaufeln, wobei die Leitschaufeln mit faserabweisenden Formgebungen versehen sind, dadurch gekennzeichnet, daß im Bereich der Leitschaufel-Anströmkanten (5) Vertiefungen (6) angeordnet sind, und daß die Vertiefungen (6) eine Verbindung zwischen den Räumen (14, 15) beiderseits einer Leitschaufel (4) herstellen.
- Kreiselpumpe nach Anspruch 1, dadurch gekennzeichnet, daß die Vertiefungen (6) einen länglichen Verlauf aufweisen.
- Kreiselpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß sich die Vertiefungen (6) im Winkel zur Rotationsebene eines Propellers (2) erstrecken.
- Kreiselpumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß im Bereich der Vertiefungen (6) die Schaufeln (4) mit einer Kante (7) freistehend ausgebildet sind.
- Kreiselpumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Vertiefungen (6) zu den Schaufeln asymmetrisch angeordnet sind.
- Kreiselpumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Seitenwände (10, 11) der Vertiefungen (6) unterschiedlich geneigt sind.
- Kreiselpumpe nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die geneigten Seitenwände (10, 11) überwiegend in demjenigen Vertiefungsteil angeordnet sind, der in Bezug auf die Leitkanäle (14, 15) eine größere Fläche aufweist.
- Kreiselpumpe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Vertiefungen (6) im Gehäuse- (1) und/oder Nabenteil (3) angeordnet ist.
- Kreiselpumpe nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß zwischen Leitschaufel, Vertiefung (6) und/oder Gehäuse (1) abgerundete Übergänge (8, 9) angeordnet sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19510811 | 1995-03-24 | ||
DE19510811A DE19510811A1 (de) | 1995-03-24 | 1995-03-24 | Faser abweisende Wandflächengestaltung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0733805A1 EP0733805A1 (de) | 1996-09-25 |
EP0733805B1 true EP0733805B1 (de) | 1998-09-23 |
Family
ID=7757631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96102053A Expired - Lifetime EP0733805B1 (de) | 1995-03-24 | 1996-02-13 | Faserabweisende Wandflächengestaltung |
Country Status (5)
Country | Link |
---|---|
US (1) | US5785495A (de) |
EP (1) | EP0733805B1 (de) |
CN (1) | CN1070583C (de) |
AT (1) | ATE171517T1 (de) |
DE (2) | DE19510811A1 (de) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5429409A (en) * | 1993-01-04 | 1995-07-04 | Asc Incorporated | Convertible top |
US6083849A (en) | 1995-11-13 | 2000-07-04 | Micron Technology, Inc. | Methods of forming hemispherical grain polysilicon |
US6435832B1 (en) | 2000-04-27 | 2002-08-20 | Chemineer, Inc. | Hub assembly |
JP3862137B2 (ja) * | 2000-09-20 | 2006-12-27 | 淳一 黒川 | ターボ形水力機械 |
US6386830B1 (en) * | 2001-03-13 | 2002-05-14 | The United States Of America As Represented By The Secretary Of The Navy | Quiet and efficient high-pressure fan assembly |
FR2825142B1 (fr) * | 2001-05-22 | 2003-08-29 | Conseils Etudes Et Recherches En Gestion De Lair Cerga | Ventilateur destine a etre associe a un conduit d'evacuation d'air hors d'au moins un local |
DE10258922A1 (de) * | 2002-12-17 | 2004-07-01 | Ksb Aktiengesellschaft | Saugkanal |
FR2902813B1 (fr) * | 2006-06-23 | 2010-06-11 | Jean-Claude Perdriel | Ensemble broyeur-pompe pour installation de wc |
US20090263238A1 (en) * | 2008-04-17 | 2009-10-22 | Minebea Co., Ltd. | Ducted fan with inlet vanes and deswirl vanes |
CA2736952C (en) | 2008-09-10 | 2016-11-29 | Pentair Pump Group, Inc. | High-efficiency, multi-stage centrifugal pump and method of assembly |
US8124019B2 (en) * | 2009-08-21 | 2012-02-28 | Exxonmobil Chemical Patents Inc. | Clog-resistant pump assembly for slurry loop reactor |
NL2003467C2 (nl) | 2009-09-10 | 2011-03-14 | Nijhuis Pompen B V | Visvriendelijke pomp- of turbineinrichting. |
CA2729368C (en) | 2010-12-31 | 2019-04-16 | Ke Imports Ltd. | Men's garment with pouch and supporting flap |
CN104612977B (zh) * | 2014-12-15 | 2017-08-04 | 武汉船用机械有限责任公司 | 一种高效大流量高扬程液货泵水力元件的设计方法 |
GB2545412B (en) | 2015-12-11 | 2018-06-06 | Dyson Technology Ltd | A hair care appliance comprising a motor |
TW202133751A (zh) | 2020-02-25 | 2021-09-16 | 加拿大商0912139不列顛哥倫比亞有限公司 | 男服 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA562851A (en) * | 1958-09-02 | F. Hausmann George | Boundary layer control apparatus for compressors | |
DE501662C (de) * | 1930-07-05 | Koester Friedrich | Schrauben- oder Propellerpumpe | |
US2202790A (en) * | 1938-02-23 | 1940-05-28 | Allis Chalmers Mfg Co | Waste paper stock pump |
GB619722A (en) * | 1946-12-20 | 1949-03-14 | English Electric Co Ltd | Improvements in and relating to boundary layer control in fluid conduits |
GB877976A (en) * | 1959-03-11 | 1961-09-20 | Power Jets Res & Dev Ltd | Multistage axial flow compressors |
US3168048A (en) * | 1962-11-14 | 1965-02-02 | Dengyosha Mach Works | Full range operable high specific speed pumps |
SE384070B (sv) * | 1974-07-23 | 1976-04-12 | Stenberg Flygt Ab | Propellerpump |
GB2245312B (en) * | 1984-06-19 | 1992-03-25 | Rolls Royce Plc | Axial flow compressor surge margin improvement |
SE466767B (sv) * | 1990-04-02 | 1992-03-30 | Flygt Ab Itt | Igensaettningsfri pump |
SE466768B (sv) * | 1990-09-12 | 1992-03-30 | Flygt Ab Itt | Igensaettningsfri pump av axialtyp |
JPH04132899A (ja) * | 1990-09-25 | 1992-05-07 | Mitsubishi Heavy Ind Ltd | 軸流送風機 |
DE4314477A1 (de) * | 1993-05-03 | 1994-11-10 | Klein Schanzlin & Becker Ag | Kreiselpumpe axialer Bauart |
US5397215A (en) * | 1993-06-14 | 1995-03-14 | United Technologies Corporation | Flow directing assembly for the compression section of a rotary machine |
-
1995
- 1995-03-24 DE DE19510811A patent/DE19510811A1/de not_active Withdrawn
-
1996
- 1996-02-13 DE DE59600588T patent/DE59600588D1/de not_active Expired - Fee Related
- 1996-02-13 AT AT96102053T patent/ATE171517T1/de not_active IP Right Cessation
- 1996-02-13 EP EP96102053A patent/EP0733805B1/de not_active Expired - Lifetime
- 1996-03-22 CN CN96105951A patent/CN1070583C/zh not_active Expired - Fee Related
- 1996-03-25 US US08/624,694 patent/US5785495A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ATE171517T1 (de) | 1998-10-15 |
CN1136644A (zh) | 1996-11-27 |
DE59600588D1 (de) | 1998-10-29 |
CN1070583C (zh) | 2001-09-05 |
EP0733805A1 (de) | 1996-09-25 |
US5785495A (en) | 1998-07-28 |
DE19510811A1 (de) | 1996-09-26 |
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