EP0618368B1 - Radial centrifugal pump - Google Patents
Radial centrifugal pump Download PDFInfo
- Publication number
- EP0618368B1 EP0618368B1 EP94102697A EP94102697A EP0618368B1 EP 0618368 B1 EP0618368 B1 EP 0618368B1 EP 94102697 A EP94102697 A EP 94102697A EP 94102697 A EP94102697 A EP 94102697A EP 0618368 B1 EP0618368 B1 EP 0618368B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- distance
- wheel
- impeller
- centrifugal pump
- pump
- 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
- 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
- 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
- F05D2250/52—Outlet
Definitions
- the invention relates to a radial centrifugal pump with an impeller, in particular with blades, which is surrounded on its circumference by fixed guide vanes.
- the object of the invention is to provide a centrifugal pump of the type mentioned, which is self-priming with low noise.
- This object is achieved in that one or two guide vanes with the front inner blade edge are close to the impeller and the distance between the front inner blade edge and the impeller is up to 4 mm, preferably 2 mm, and in that the distance between the front blade edges of the rest Guide vanes and the impeller circumference is at least twice the distance of the nearby guide vane (s).
- the pump runs very quietly. Nevertheless, the pump is self-priming, since this is ensured by the fixed guide vane arranged at the top, which is arranged with its front inner vane edge close to the circumference of the impeller. This creates a centrifugal pump with little design effort, which, despite its self-priming properties, generates only little noise.
- the upper guide vane thus improves the suction behavior of the pump with regard to the suction height and suction time, while the remaining stationary guide vanes reduce the noise level of the pump.
- the impeller 1 is fixed on a shaft 2 and has a diameter D2.
- the impeller carries four blades 3.
- the impeller is surrounded on its circumference 4 by fixed guide vanes 5.
- the dimensions of the distances a and b can be designed differently than mentioned in this exemplary embodiment. It is important that the distance b is always smaller than the distance a, it having been found to be advantageous that the distance a is at least twice as large as the distance b.
Description
Die Erfindung betrifft eine Radialkreiselpumpe mit einem, insbesondere Schaufeln aufweisenden Laufrad, das an seinem Umfang von feststehenden Leitschaufeln umgeben ist.The invention relates to a radial centrifugal pump with an impeller, in particular with blades, which is surrounded on its circumference by fixed guide vanes.
Es ist bekannt, das Laufrad einer Kreiselpumpe ringsum von feststehenden Leitschaufeln umgeben zu lassen. Soll eine solche Kreiselpumpe selbstansaugend sein, so ist bekannt, die vorderen inneren Kanten der Leitschaufeln sehr nahe am Umfang des Laufrades anzuordnen, siehe z.B. das Dokument GB-A-976 114. Dies fuhrt aber zu einer verhältnismaßig großen Geräuschentwicklung. Soll dagegen eine Kreiselpumpe mit geringen Geräuschen geschaffen werden, so haben die feststehenden Leitschaufeln einen größeren Abstand zum Laufradumfang. In diesem Fall ist aber die Pumpe nicht mehr selbstansaugend. Aufgabe der Erfindung ist es, eine Kreiselpumpe der eingangs genannten Art zu schaffen, die bei geringer Geräuschentwicklung selbstansaugend ist.It is known to have the impeller of a centrifugal pump all around surrounded by fixed guide vanes. If such a centrifugal pump is to be self-priming, it is known to arrange the front inner edges of the guide vanes very close to the circumference of the impeller, see for example document GB-A-976 114. However, this leads to a comparatively large amount of noise. If, on the other hand, a centrifugal pump with low noise is to be created, the fixed guide vanes are at a greater distance from the circumference of the impeller. In this case, however, the pump is no longer self-priming. The object of the invention is to provide a centrifugal pump of the type mentioned, which is self-priming with low noise.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß eine oder zwei Leitschaufeln mit der vorderen inneren Schaufelkante nahe am Laufrad liegen und der Abstand zwischen der vorderen inneren Schaufelkante und dem Laufrad bis 4 mm, vorzugsweise 2 mm beträgt und daß der Abstand zwischen den vorderen Schaufelkanten der übrigen Leitschaufeln und dem Laufradumfang mindestens das Zweifache des Abstandes der nahen Leitschaufel(n) ist.This object is achieved in that one or two guide vanes with the front inner blade edge are close to the impeller and the distance between the front inner blade edge and the impeller is up to 4 mm, preferably 2 mm, and in that the distance between the front blade edges of the rest Guide vanes and the impeller circumference is at least twice the distance of the nearby guide vane (s).
Da die meisten feststehenden Leitschaufeln in einem großen feststehenden Abstand zum Laufradumfang angeordnet sind, läuft die Pumpe sehr leise. Dennoch ist die Pumpe selbstansaugend, da hierfür die oben angeordnete feststehende Leitschaufel sorgt, die mit ihrer vorderen inneren Schaufelkante nahe am Laufradumfang angeordnet ist. Damit wird bei geringem konstruktiven Aufwand eine Kreiselpumpe geschaffen, die trotz ihrer selbstansaugenden Eigenschaft nur geringe Geräusche entwickelt. Die obere Leitschaufel verbessert somit das Ansaugverhalten der Pumpe bezüglich Ansaughöhe und Ansaugzeit, während die übrigen feststehenden zurückliegenden Leitschaufeln die Geräuschentwicklung der Pumpe reduzieren.Since most of the stationary guide vanes are arranged at a large fixed distance from the circumference of the impeller, the pump runs very quietly. Nevertheless, the pump is self-priming, since this is ensured by the fixed guide vane arranged at the top, which is arranged with its front inner vane edge close to the circumference of the impeller. This creates a centrifugal pump with little design effort, which, despite its self-priming properties, generates only little noise. The upper guide vane thus improves the suction behavior of the pump with regard to the suction height and suction time, while the remaining stationary guide vanes reduce the noise level of the pump.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung in einem Schnitt senkrecht zur Laufradachse dargestellt und wird im folgenden näher beschrieben.An embodiment of the invention is shown in the drawing in a section perpendicular to the impeller axis and is described in more detail below.
Das Laufrad 1 ist auf einer Welle 2 befestigt und besitzt einen Druchmesser D2. Das Laufrad trägt im Ausführungsbeispiel vier Schaufeln 3.The impeller 1 is fixed on a
Das Laufrad ist an seinem Umfang 4 von feststehenden Leitschaufeln 5 umgeben. Der Abstand a der feststehenden Leitschaufeln 5, d.h. der Abstand der vorderen (inneren) Schaufelkante zum Außendurchmesser des Laufrades 1 ist so groß gewählt, daß die Pumpe leise läuft. Im Ausführungsbeispiel beträgt der Abstand a 6 mm.The impeller is surrounded on its
Im oberen Bereich der Pumpenkammer ist eine feststehende Letischaufel näher an den Laufradumfang 4 herangeführt als die übrigen feststehenden Leitschaufeln. Die innere vordere Schaufelkante 6 dieser oberen Leitschaufel 5a weist einen Abstand b von 2 mm zum Laufradumfang 4 auf. Diese wesentlich näher an den Laufradumfang 4 herangeführte Leitschaufel 5a verbessert das Ansaugverhalten der Pumpe bezüglich Ansaughöhe und Ansaugzeit.In the upper region of the pump chamber, a fixed let blade is brought closer to the
Die Maße der Abstände a und b können anders als in diesem Ausführungsbeispiel erwähnt ausgeführt sein. Wichtig ist, daß der Abstand b stets kleiner ist als der Abstand a, wobei es sich als vorteilhaft herausgestellt hat, daß der Abstand a mindestens doppelt so groß ist wie der Abstand b.The dimensions of the distances a and b can be designed differently than mentioned in this exemplary embodiment. It is important that the distance b is always smaller than the distance a, it having been found to be advantageous that the distance a is at least twice as large as the distance b.
Claims (2)
- A radial centrifuaal pump having a wheel (1) which has blades and whose periphery is surrounded by fixed guide blades (5), characterized in that- one or two guide blades (5a) are disposed with their leading inner blade edge (6) adjacent the wheel (1) and the distance (b) between the leading inner blade edge (6) and the wheel (1) is up to 4 mm, preferably 2 mm,- and the distance (8a) between the leading edges of the remaining guide blades and the wheel periphery (4) is at least twice the distance (b) of the adjacent guide blade(s) (5a).
- A radial centrifugal pump according to claim 1, characterized in that when the wheel shaft (2) is substantially horizontal the adjacent blade (5a) is disposed closer to the wheel (1) in the upper zone.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4309479A DE4309479A1 (en) | 1993-03-24 | 1993-03-24 | Radial centrifugal pump |
| DE4309479 | 1993-03-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0618368A1 EP0618368A1 (en) | 1994-10-05 |
| EP0618368B1 true EP0618368B1 (en) | 1996-04-24 |
Family
ID=6483668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94102697A Expired - Lifetime EP0618368B1 (en) | 1993-03-24 | 1994-02-23 | Radial centrifugal pump |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0618368B1 (en) |
| DE (2) | DE4309479A1 (en) |
| ES (1) | ES2086974T3 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6017187A (en) * | 1994-03-19 | 2000-01-25 | Ksb Aktiengesellschaft | Device for reducing noise in centrifugal pumps |
| WO1999061801A1 (en) * | 1998-05-28 | 1999-12-02 | Ebara Corporation | Turbomachinery |
| DE102013218410B4 (en) * | 2013-09-13 | 2022-07-14 | Technochem Im- Und Export Gmbh | centrifugal pump |
| DE102016201256A1 (en) * | 2016-01-28 | 2017-08-03 | Siemens Aktiengesellschaft | Turbomachine with bladed diffuser |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR899637A (en) * | 1942-09-11 | 1945-06-06 | Daimler Benz Ag | Guide vane crown for centrifugal compressor |
| US2653546A (en) * | 1949-11-03 | 1953-09-29 | Jr Alfred S Marlow | Self-priming pump |
| US3103177A (en) * | 1961-07-20 | 1963-09-10 | Bell & Gossett Co | Self-priming centrifugal pump |
| US3873231A (en) * | 1972-08-11 | 1975-03-25 | Allis Chalmers | Centrifugal pump diffuser |
| DE3539883A1 (en) * | 1985-09-18 | 1987-03-26 | Hermetic Pumpen Gmbh | Self-priming centrifugal pump |
| DE3712916A1 (en) * | 1987-04-16 | 1988-11-03 | Korthaus Ernst | SELF-SUCTIONING CENTRIFUGAL PUMP |
-
1993
- 1993-03-24 DE DE4309479A patent/DE4309479A1/en not_active Withdrawn
-
1994
- 1994-02-23 ES ES94102697T patent/ES2086974T3/en not_active Expired - Lifetime
- 1994-02-23 DE DE59400226T patent/DE59400226D1/en not_active Expired - Lifetime
- 1994-02-23 EP EP94102697A patent/EP0618368B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0618368A1 (en) | 1994-10-05 |
| ES2086974T3 (en) | 1996-07-01 |
| DE4309479A1 (en) | 1994-09-29 |
| DE59400226D1 (en) | 1996-05-30 |
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