EP0733808B1 - Kreiselpumpe - Google Patents
Kreiselpumpe Download PDFInfo
- Publication number
- EP0733808B1 EP0733808B1 EP96102054A EP96102054A EP0733808B1 EP 0733808 B1 EP0733808 B1 EP 0733808B1 EP 96102054 A EP96102054 A EP 96102054A EP 96102054 A EP96102054 A EP 96102054A EP 0733808 B1 EP0733808 B1 EP 0733808B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- flow
- centrifugal pump
- pump according
- wall projection
- 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
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
- F04D29/4273—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps suction eyes
-
- 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
- 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
- F04D29/448—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps bladed diffusers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/10—Stators
- F05B2240/12—Fluid guiding means, e.g. vanes
- F05B2240/121—Baffles or ribs
-
- 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
- F05D2250/00—Geometry
- F05D2250/50—Inlet or outlet
- F05D2250/51—Inlet
Definitions
- the invention relates to a centrifugal pump, in the housing of which one or more Impellers are arranged, being preceded by the impellers in the area Flow openings flow-carrying parts are arranged vlg. e.g. CH-A-259921.
- the aerodynamic advantages of these ribs also include manufacturing disadvantages. With cast pump housings they are Insert ribs as loose parts in a core box and provide an additional one Production effort. With a clever arrangement of a core division the ribs can also be provided as stationary elements. Then they are however exposed to increased wear during the molding processes. Farther the ribs are at risk of breakage. On the one hand, when molding a cast one Housing and on the other hand in unfavorable operating conditions, if Oscillations and vibrations can arise.
- ribs are exposed to cavitation erosion.
- a so-called partial load vortex forms in the impeller inlet rotates with the direction of rotation of the impeller.
- the part load vortex can be considered a Flow are considered that in the area of the impeller inlet diameter Leaves the impeller, flows against the medium, then on a smaller one Diameter to reenter the impeller. At the same time, it rotates Partial load vortex around the axis of rotation of the impeller in the area of Impeller inlet diameter.
- the invention is based on the problem of an impeller inflow to develop a streamlined solution with the simplest manufacturing technology Manufacturing avoids the disadvantages mentioned above.
- the solution to this problem takes place with the features of claim 1.
- the solution according to the invention results a flow-guiding part, which as a wall projection of the peripheral surface of the Flow opening is shaped. If a housing part forming the inlet as Sheet metal part is formed, then the flow-carrying part can be like a kind Bead to be pressed into the flow cross-section. When training as Single part can pass into the peripheral surface. Should the housing be cast be formed, then the contour of a core can be dispensed with insert parts be designed so that the peripheral surface of the flow opening is the above-mentioned Has shape.
- Embodiments of the invention provide that one of the wall surfaces Wall protrusion two surfaces run predominantly in the direction of flow and a surface opposite an impeller runs transversely to the direction of flow or that a wall projection by at least three in the peripheral surface of one Flow opening merging surfaces is formed.
- the ledge is in its shape comparable to a kind of corner or a pyramidal or truncated pyramidal body. This body is with his Base area on the circumferential surface of the flow opening and goes into the Circumferential surface over or develops from it. From the ledge run two surfaces in the direction of flow and exercise a guiding function on the Flow out.
- a third surface lies directly on the impeller cross section opposite and is large-scale.
- This also supports a further embodiment of the invention, according to which one of the in Surfaces extending approximately tangentially to the flow direction Circumferential component of an impeller runs. So that a course of the Wall projection ensures that a part-load vortex exits the Impeller blocked on the largest possible area.
- This wall surface course opens in the direction of rotation of the impeller first the inflow to the impeller and then the outlet a part load vortex from the impeller. So that the negative effects of a Partial load vortex can be significantly reduced, which makes the pump less Power consumption needed.
- a rib represents a part-load vortex only a slight resistance, so that it is turned away and after the Rib can have negative effects.
- the in Surfaces of the wall projection extending between them an opening angle that is in the range between 75 and 130 °.
- the transitions between the individual flows Areas and the transition into the peripheral surface of the housing wall corresponding rounding radii or chamfers.
- a centrifugal pump is shown, the housing 1 is designed as a casting and each has an integrated suction nozzle 2 and pressure nozzle 3.
- the Intake manifold 2 is designed here as an intake manifold, which is used for a deflection of a pumping medium flowing to a pump impeller 4.
- the suction nozzle 2 or suction manifold can also be designed as an independent component, which can be flange-mounted on the housing, for example.
- the inflow to the Housing 1 is also possible from the axial direction.
- the centrifugal pump itself can - as shown - single-stage or by further components arranged after the impeller 4 also be multi-level. With multi-stage design with single or multi-flow and opposing impeller arrangements can the inventive design also find use.
- the housing 1 or the suction nozzle 2 has in front of the first impeller 4 here a flow opening 5, through which a medium leaves a suction port 2 and enters an impeller 4.
- this flow opening 5 there are one or more Wall projections 6 are arranged, which have a flow-guiding function.
- a surface C of the wall projection 6 directly opposite an impeller 4 hinders a part load vortex emerging from the impeller 4 in its Spread.
- the surfaces of the wall projection 6, of which the one visible here Area A has a flow-guiding function are shown in the following figures explained in more detail.
- Fig. 2 is a section of an axial for better understanding Suction port 2 shown, the flow opening 5 with two wall projections 6th is shown in perspective.
- the straight arrow corresponds to the Flow direction of an inflowing medium.
- the curved arrow symbolizes the direction of rotation of an adjacent, but not shown Impeller.
- the lower wall projection 6 here is only partially visible, while on here upper wall projection 6 with large letters A - C whose surfaces and with small letters a - c whose side lines are marked.
- Surface C lies directly opposite an impeller and runs across it Flow direction.
- the perpendicular course to the axis of rotation of the impeller is not imperative, slight inclinations towards a vertical are without influence.
- the two surfaces A and B are used to flow the fluid and run in the direction of flow.
- the areas A and B meet in the area of an edge c together and form an angle between them. This can be in the Range from 75 ° to 130 °.
- the course of the areas A - C does not have to as shown in the figures, be straight and flat. He can also do other things Example run slightly curved three-dimensional. Likewise, the areas tiered, slightly offset or similar.
- partial load vortex which rotates in the direction of rotation of the barrel.
- Partial load eddies are braked on surface A and by surface C in its Spread be hampered.
- Area B which is approximately tangential to Circumferential component of an impeller runs, the blocked cross section again release.
- the part-load vortex is known to have the property in the range of Circumferential surface of the flow opening 5 to emerge from the impeller and in Flow area of the axis of rotation back to the impeller.
- the size of the area C is determined by the ratio of the two side lines a, b determined to each other.
- the side line a is formed by the together adjacent areas A and C and the side line b is formed by the abutting surfaces C, B.
- the ratio of the side lines a to b is equal to or less than 1.
- the wall projection 6 shown in FIG its shape resembles an oblique pyramid.
- 3-6 are various cross-sectional shapes of a flow opening 5 shown. These correspond to a section as shown in FIG. 1 with III - VI is shown.
- Fig. 3 shows an example in which a suction nozzle 2 as Sheet metal part is formed.
- the wall projection 6 be pressed into the wall surface using suitable tools. Consequently the areas A, B develop directly from the wall surface or peripheral surface, the surrounds the flow opening 5.
- the curved arrow indicates the direction of rotation of the Impeller, which would be located above the drawing level.
- One from the Impeller escaping and rotating with this partial load vortex would on the rear the side line a and here perpendicular to the plane of the drawing Area A are braked.
- One of the side lines a, b and the circumference U limited area C prevents the part-load vortex from spreading.
- the areas C are shown only schematically in Fig. 3, because they are due to the Cutting line course are not visible.
- FIG. 4 an embodiment is shown in which the suction nozzle 2 as Cast construction can be formed.
- 5 shows a subject Embodiment in which a wall protrusion 6 by machining can be worked out and in Fig. 6 the wall projection 6 as separate item inserted into a suction port. You can attach it here done from outside by known means.
- 5 and 6 can also be seen that the side lines a, b and the adjacent surfaces A, B between them can include a different angle ⁇ . A bisector this angle ⁇ does not go through the axis of rotation of the impeller, but rather runs she clearly outside of it.
- the inclination of the Wall areas vary slightly.
- the one adjacent to the side line b Wall surface B is approximately tangential to the peripheral component of an impeller run so as to cause the formation of cavitation damage Dead space whirling, seen in the direction of rotation in the area behind the wall projection 6, to prevent.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
- Fig. 1
- einen Querschnitt durch eine Kreiselpumpe mit dem ersten Laufrad vorangestellten Einlaufkrümmer, die
- Fig. 2
- am Beispiel einer axialen Zuströmung eine perspektive Ansicht einer erfindungsgemäßen gestalteten Durchflußöffnung und die
- Fig. 3 - 6
- Varianten der Querschnittsform des Einlaufes.
Claims (8)
- Kreiselpumpe, in deren Gehäuse ein oder mehrere Laufräder angeordnet sind, wobei im Bereich von den Laufrädern vorangestellten Durchflußöffnungen strömungsführende Teile angeordnet sind, dadurch gekennzeichnet, daß ein strömungsführendes Teil als Wandvorsprung (6) ausgebildet ist, daß zwei in Strömungsrichtung verlaufende, in die Umfangsfläche einer Durchflußöffnung (5) übergehende Flächen (A, B) des Wandvorsprunges (6) zwischen sich einen Winkel (ε) einschließen, wobei Seitenlinien (a, b) der den Winkel (ε) einschließenden Flächen (A, B) ein Verhältnis von a / b ≤ 1 aufweisen und daß die Seitenlinien (a, b) in Verbindung mit einem Teil des Umfanges der Durchflußöffnung (5) eine Wandfläche (C) einschließen.
- Kreiselpumpe nach Anspruch 1, dadurch gekennzeichnet, daß von den Flächen (A, B, C) eines Wandvorsprunges (6) zwei Flächen (A, B) überwiegend in Strömungsrichtung verlaufen und eine einem Laufrad (4) gegenüberliegende Fläche (C) quer zur Strömungsrichtung verläuft.
- Kreiselpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß ein Wandvorsprung (6) durch mindestens drei in die Umfangsfläche einer Durchflußöffnung (5) übergehende Flächen (A, B, C) gebildet ist.
- Kreiselpumpe nach Anspruch 3, dadurch gekennzeichnet, daß eine der sich Strömungsrichtung erstreckenden und in die Umfangsfläche einer Durchflußöffnung (5) übergehende Fläche (B) deren Seitenlinie (b) annähernd tangential zur Umfangskomponentes eines Laufrades (4) verläuft.
- Kreiselpumpe nach Anspruch 3, dadurch gekennzeichnet, daß eine der sich in Strömungsrichtung erstreckenden Fläche (A) und deren Seitenlinie (a) auf der Umfangsfläche der Durchflußöffnung (5) stehen.
- Kreiselpumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die in Strömungsrichtung verlaufenden Flächen (A, B) des Wandvorsprunges (6) zwischen sich einen Winkel (ε) einschließen, der im Bereich zwischen 75° und 130 ° liegt.
- Kreiselpumpe nach Anspruch 6, dadurch gekennzeichnet, daß eine Winkelhalbierende des Winkels (ε) außerhalb der Drehachse des Laufrades verläuft.
- Kreiselpumpe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Seitenlinien (a - c) einen flächenförmigen Verlauf aufweisen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19510812 | 1995-03-24 | ||
DE19510812A DE19510812A1 (de) | 1995-03-24 | 1995-03-24 | Kreiselpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0733808A1 EP0733808A1 (de) | 1996-09-25 |
EP0733808B1 true EP0733808B1 (de) | 2000-01-12 |
Family
ID=7757632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96102054A Expired - Lifetime EP0733808B1 (de) | 1995-03-24 | 1996-02-13 | Kreiselpumpe |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0733808B1 (de) |
DE (2) | DE19510812A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007048019A1 (de) * | 2007-10-06 | 2009-04-09 | Bayerische Motoren Werke Aktiengesellschaft | Pumpe |
DE102010054084B4 (de) * | 2010-12-10 | 2023-04-06 | Volkswagen Aktiengesellschaft | Kühlmittelpumpe |
CN104235070A (zh) * | 2013-06-13 | 2014-12-24 | 德昌电机(深圳)有限公司 | 泵壳及具有该泵壳的泵 |
AT517125B1 (de) * | 2015-05-07 | 2019-07-15 | Avl List Gmbh | Kühlmittelpumpe für eine brennkraftmaschine |
DE102021105727A1 (de) | 2021-03-10 | 2022-09-15 | KSB SE & Co. KGaA | Kreiselpumpe mit Einlaufrippen |
DE102022129987B3 (de) | 2022-11-14 | 2024-03-14 | Bayerische Motoren Werke Aktiengesellschaft | Strömungsmaschine, insbesondere für ein Kraftfahrzeug, sowie Kraftfahrzeug mit einer solchen Strömungsmaschine |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB180823A (en) * | 1921-03-31 | 1922-06-08 | George Ure Reid | Improvements in centrifugal pumps |
US2219390A (en) * | 1938-09-12 | 1940-10-29 | Duriron Co | Centrifugal pump with dual impeller |
CH259921A (de) * | 1946-01-31 | 1949-02-15 | Ford Motor Co | Zentrifugalpumpe. |
DE1653786B2 (de) * | 1968-02-15 | 1972-03-02 | J M Voith GmbH, 7920 Heidenheim | Saugkruemmer fuer kreiselpumpen |
DE2243365C3 (de) * | 1972-09-02 | 1979-02-22 | Klein, Schanzlin & Becker Ag, 6710 Frankenthal | Selbsttätige Sicherheitsregelung für einen Reaktorkühlkreislauf |
DE2933904C2 (de) * | 1979-08-22 | 1985-03-14 | Klein, Schanzlin & Becker Ag, 6710 Frankenthal | Einlaufkrümmer |
EP0391352B1 (de) * | 1989-04-06 | 1995-03-08 | Ebara Corporation | Tauchmotorpumpe |
DE4121600A1 (de) * | 1991-06-29 | 1993-01-07 | Grundfos Int | Tauchpumpenaggregat |
-
1995
- 1995-03-24 DE DE19510812A patent/DE19510812A1/de not_active Withdrawn
-
1996
- 1996-02-13 DE DE59604148T patent/DE59604148D1/de not_active Expired - Lifetime
- 1996-02-13 EP EP96102054A patent/EP0733808B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0733808A1 (de) | 1996-09-25 |
DE19510812A1 (de) | 1996-09-26 |
DE59604148D1 (de) | 2000-02-17 |
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