EP1180600B1 - Measurement and control procedure for the instantaneous flow of a centrifugal pump - Google Patents

Measurement and control procedure for the instantaneous flow of a centrifugal pump Download PDF

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Publication number
EP1180600B1
EP1180600B1 EP01117988A EP01117988A EP1180600B1 EP 1180600 B1 EP1180600 B1 EP 1180600B1 EP 01117988 A EP01117988 A EP 01117988A EP 01117988 A EP01117988 A EP 01117988A EP 1180600 B1 EP1180600 B1 EP 1180600B1
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EP
European Patent Office
Prior art keywords
pressure
impeller
pump
plant
suction
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Expired - Lifetime
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EP01117988A
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German (de)
French (fr)
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EP1180600A2 (en
EP1180600A3 (en
Inventor
Jürgen Gröschel
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KSB AG
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KSB AG
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Publication of EP1180600A3 publication Critical patent/EP1180600A3/en
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Publication of EP1180600B1 publication Critical patent/EP1180600B1/en
Priority to CY20101100697T priority Critical patent/CY1110707T1/en
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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
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0088—Testing machines

Definitions

  • the invention relates to a method for determining the delivered by an impeller flow rate of a conveyor system integrated in a centrifugal pump, wherein carried out within the conveyor system pressure measurements are assigned by a Ausretelogik respectively corresponding determined in an original measurement flow rates.
  • This type of flow rate determination is basically from the US 4,821,580 known.
  • the device taught In the device taught there measurements of the pressure in the area in front of the suction line of a centrifugal pump and in the pressure line are made.
  • the detected pressures are stored and optionally evaluated together with other inputs for the determination of certain data, such as the flow rate.
  • the type of measurement used here is comparable with a determination of the pump characteristic curve on a test bench.
  • the disadvantage of the fact that the influence of the pump housing is included in the measurement and thereby results in an unstable or flat characteristic. This leads due to lack of clarity to inaccuracies in the flow rate determination.
  • the invention has for its object to provide a method of the type mentioned above and a device using this method, which provide an accurate determination of the flow rate even with unstable or flat pump characteristics fulfillment of the basic requirement of low cost.
  • the stated object is achieved in that is used to determine the flow rate of not affected by influences of the pump housing and any guide pressure build-up of the impeller.
  • the solution according to the invention utilizes the fact that the impeller causes only small losses in comparison to a pump housing or a guide. So it does not come to a measurement impairing training an unstable characteristic.
  • suction-side system pressure as e.g. is given in a closed circuit, it is sufficient if measured in a source measurement the pressures at different flow rates measured on the impeller and an evaluation are available. The influence of the flow rate can be neglected here.
  • the suction-side system pressure changes with the removal. Therefore, this pressure must be taken into account when determining the flow rate. This can be done with the aid of known system data or by means of a pressure sensor arranged on the pump suction side.
  • a device suitable for carrying out the method according to the invention in a closed circuit can be realized with the aid of a pressure sensor arranged in the pressure-side wheel side space of the centrifugal pump, which pressure sensor is connected to an evaluation device for determining the delivery rate.
  • a pressure sensor arranged on the pump suction side and in the pressure-side wheel side space should each be connected to the evaluation device.
  • the inventive method works reliably and with good accuracy, since the static pressure measured in the pressure-side Radierraum results in approximately a steadily falling straight line over the entire flow rate history. It is thus given a clear relationship between the measured pressure and the flow rate.
  • the inventive method requires only a comparatively small effort for the determination of the flow rate. Nevertheless, it is distinguished from the known methods by a higher accuracy. This applies both to the complex differential pressure measurement in changing cross sections and compared to the other described methods, since eliminating an unstable course of the characteristic curve by eliminating main loss paths.
  • the housing 1 in the Fig. 1 shown centrifugal pump has an inlet 2 and an outlet 3.
  • a mounted on a shaft 4 impeller 5 is disposed in the housing 1.
  • a pressure sensor 7 is provided, which is connected via a line 8 with an evaluation device 9.
  • Another - shown in dashed lines - pressure sensor 10 is arranged in front of the inlet 2 of the housing 1.
  • the pressure sensor 10 is connected to the evaluation device 9.
  • the pressure sensor 10 is arranged in a pipeline 12, which leads to a - not shown here - tank. So this is an open system.
  • the liquid in the tank is conveyed via the outlet 3 to a - not shown - mouth. Since the decreasing liquid level in the tank leads to a corresponding continued pressure drop before the inlet 2 of the centrifugal pump, the pressure increase caused by the impeller 5 must be determined by a differential pressure formation of the values of the sensors 7 and 10. A pressure increase of the impeller 5 to be assigned to the different delivery quantities is determined in an original measurement and stored in the evaluation device 9. The stored information is used in the determination of the flow rate.
  • the characteristics of the Fig. 2 are based centrifugal pumps with an impeller of two different calibration diameters.
  • the characteristics 13 and 14 relate to the first impeller and the characteristics 15 and 16 to the second impeller.
  • the curves 13 and 15 are pump characteristics, which were determined by a differential pressure measurement between the suction and discharge nozzles of the centrifugal pumps.
  • the characteristics 13 and 15 have an unstable course and are therefore unsuitable for determining the flow rate.
  • the characteristic curves 14 and 16 are impeller characteristic curves, which were determined by a pressure sensor 7. Their course is clearly stable. Therefore, these characteristics are suitable for accurate determination of the flow rate.

Abstract

Pressure measurements taken in a feed system containing the pump are apportioned by an evaluator to capacities determined during initial measuring. Capacity is determined by using the pressure build-up of the pump rotor (5), which is not influenced by pump housing (1) and any guide devices. The build-up is measured at a point near the pump rotor outlet on the pump pressure side and in front of the entry into flow guidance parts. Pressure sensors (7,10) on pressure and suction sides of the rotor are connected to the evaluator (9).

Description

Die Erfindung bezieht sich auf ein Verfahren zur Ermittlung der durch ein Laufrad erbrachten Fördermenge einer in ein Fördersystem integrierten Kreiselpumpe, wobei innerhalb des Fördersystems vorgenommene Druckmessungen durch eine Auswertelogik jeweils entsprechenden, in einer Ursprungsmessung festgestellten Fördermengen zugeordnet werden.The invention relates to a method for determining the delivered by an impeller flow rate of a conveyor system integrated in a centrifugal pump, wherein carried out within the conveyor system pressure measurements are assigned by a Auswertelogik respectively corresponding determined in an original measurement flow rates.

Diese Art der Fördermengenermittlung ist grundsätzlich aus der US 4 821 580 bekannt. Bei der dort gelehrten Einrichtung werden Messungen des Druckes in dem Bereich vor der Saugleitung einer Kreiselpumpe und in deren Druckleitung vorgenommen. In einem Rechner werden die erfaßten Drücke gespeichert und gegebenenfalls zusammen mit anderen Eingaben für die Feststellung bestimmter Daten, beispielsweise der Fördermenge, ausgewertet. Die hier angewandte Art der Messung ist vergleichbar mit einer Ermittlung der Pumpenkennlinie auf einem Prüfstand. Nachteilig der Umstand, daß der Einfluß des Pumpengehäuses in die Messung mit einfließt und sich dadurch eine instabile oder flache Kennlinie ergibt. Diese führt wegen fehlender Eindeutigkeit zu Ungenauigkeiten in der Fördermengenbestimmung.This type of flow rate determination is basically from the US 4,821,580 known. In the device taught there measurements of the pressure in the area in front of the suction line of a centrifugal pump and in the pressure line are made. In a computer, the detected pressures are stored and optionally evaluated together with other inputs for the determination of certain data, such as the flow rate. The type of measurement used here is comparable with a determination of the pump characteristic curve on a test bench. The disadvantage of the fact that the influence of the pump housing is included in the measurement and thereby results in an unstable or flat characteristic. This leads due to lack of clarity to inaccuracies in the flow rate determination.

Eine andere Art der Fördermengenermittlung ist aus der US 5 129 264 bekannt. Dort wird eine Differenzdruckmessung zwischen dem Eingang und dem Ausgang des Druckstutzens der Kreiselpumpe vorgenommen. Genutzt wird hier der Umstand, daß sich der Druck des fließenden Mediums mit dem Querschnitt des Strömungsweges verändert, wobei die gemessenen Drücke einen Rückschluß auf die jeweilige Fördermenge zulassen. Somit wird der ermittelte Wert zusammen mit einer Strömungskonstanten in einer Auswertelogik zur Bestimmung der aktuellen Durchflußmenge herangezogen. Die in der US 5 129 264 konkret gelehrte Ausführung bedarf aber auch noch eines gewissen Aufwandes, da der Druckstutzen zur Anbringung einer Vielzahl von Meßstellen durchbohrt werden muß. Weil aber die Strecke zwischen den Meßpunkten relativ kurz ist und die Querschnittsänderungen klein sind, ergeben sich große Ungenauigkeiten bei der Bestimmung der Fördermenge.Another type of flow rate determination is from the US 5,129,264 known. There, a differential pressure measurement between the input and the output of the pressure port of the centrifugal pump is made. Used here is the fact that the pressure of the flowing medium changes with the cross section of the flow path, the measured pressures allow a conclusion on the respective flow rate. Thus, the determined value is used together with a flow constant in a Auswertelogik to determine the current flow rate. The in the US 5,129,264 However, concretely learned execution also requires a certain effort, since the discharge nozzle to be pierced for attaching a variety of measuring points got to. But because the distance between the measuring points is relatively short and the cross-sectional changes are small, there are great inaccuracies in the determination of the flow rate.

Aus der EP 0 641 997 B1 ist eine vergleichbare Einrichtung bekannt, bei der allerdings der notwendige Aufwand dadurch verringert wurde, daß lediglich zwei Druckmeßstellen notwendig sind, die bei Verwendung eines Spiralgehäuses vorteilhafterweise an dessen Sporn anzuordnen sind. Allerdings hat auch diese Ausführung den Nachteil, daß der Einfluß des Pumpengehäuses in die Messung einfließt, so daß bei einem instabilen oder flachen Verlauf der Pumpenkennlinie die jeweilige Fördermenge nicht eindeutig oder nur ungenau zu ermitteln ist.From the EP 0 641 997 B1 a comparable device is known in which, however, the necessary effort has been reduced by the fact that only two pressure measuring points are necessary, which are advantageously to be arranged at the spur when using a spiral housing. However, this embodiment also has the disadvantage that the influence of the pump housing flows into the measurement, so that in the case of an unstable or flat course of the pump characteristic, the respective delivery rate can not be determined unequivocally or only in an imprecise manner.

Die Druckschrift EP 0 774 583 , die als nächstliegender Stand der Technik angesehen wird, offenbart die Merkmale des Oberbegriffs des Anspruchs 1.The publication EP 0 774 583 , which is considered to be the closest prior art, discloses the features of the preamble of claim 1.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art und eine dieses Verfahren nutzende Vorrichtung zu schaffen, die bei Erfüllung der grundsätzlichen Voraussetzung eines geringen Aufwandes eine auch bei instabilen oder flachen Pumpenkennlinien genaue Ermittlung der Fördermenge erbringen.The invention has for its object to provide a method of the type mentioned above and a device using this method, which provide an accurate determination of the flow rate even with unstable or flat pump characteristics fulfillment of the basic requirement of low cost.

Die gestellte Aufgabe wird dadurch gelöst, daß zur Bestimmung der Fördermenge der von Einflüssen des Pumpengehäuses und etwaiger Leiteinrichtungen nicht beeinträchtigte Druckaufbau des Laufrades herangezogen wird.The stated object is achieved in that is used to determine the flow rate of not affected by influences of the pump housing and any guide pressure build-up of the impeller.

Die erfindungsgemäße Lösung nutzt den Umstand, daß das Laufrad im Vergleich zu einem Pumpengehäuse oder einer Leiteinrichtung nur geringe Verluste verursacht. Es kommt also nicht zu einer die Messung beeinträchtigenden Ausbildung einer instabil verlaufenden Kennlinie.The solution according to the invention utilizes the fact that the impeller causes only small losses in comparison to a pump housing or a guide. So it does not come to a measurement impairing training an unstable characteristic.

Es empfiehlt sich, den Druckaufbau des Laufrades an einem auf der Pumpendruckseite in der Nähe des Laufradaustrittes und vor dem Eintritt in strömungsleitende Elemente gelegenen Meßpunkt zu erfassen. Zweckmäßigerweise wird ein solcher Meßpunkt im druckseitigen Radseitenraum der Kreiselpumpe angeordnet.It is recommended to detect the pressure build-up of the impeller at a located on the pump pressure side in the vicinity of the impeller outlet and before entering flow-conducting elements measuring point. Appropriately, such a measuring point is arranged in the pressure side Radseitenraum the centrifugal pump.

Bei konstantem saugseitigen Anlagendruck, wie er z.B. in einem geschlossenen Kreislauf gegeben ist, genügt es, wenn in einer Ursprungsmessung die sich bei verschiedenen Fördermengen einstellenden Drücke am Laufrad gemessen und einer Auswerteeinrichtung zur Verfügung gestellt werden. Der Einfluß der Strömungsgeschwindigkeit kann hierbei vernachlässigt werden.At constant suction-side system pressure, as e.g. is given in a closed circuit, it is sufficient if measured in a source measurement the pressures at different flow rates measured on the impeller and an evaluation are available. The influence of the flow rate can be neglected here.

In einer offenen Anlage, also beispielsweise in einem System zur Entleerung eines Tanks, verändert sich der saugseitige Anlagendruck mit der Entnahme. Daher muß bei einer Bestimmung der Fördermenge dieser Druck jeweils berücksichtigt werden. Dies kann mit Hilfe bekannter Anlagendaten oder mittels eines auf der Pumpensaugseite angeordneten Drucksensors geschehen.In an open system, for example in a system for emptying a tank, the suction-side system pressure changes with the removal. Therefore, this pressure must be taken into account when determining the flow rate. This can be done with the aid of known system data or by means of a pressure sensor arranged on the pump suction side.

Eine zur Durchführung des erfindungsgemäßen Verfahrens in einem geschlossenen Kreislauf geeignete Vorrichtung kann mit Hilfe eines im druckseitigen Radseitenraum der Kreiselpumpe angeordneten Drucksensors, welcher mit einer Auswerteeinrichtung zur Bestimmung der Fördermenge verbunden ist, verwirklicht werden.A device suitable for carrying out the method according to the invention in a closed circuit can be realized with the aid of a pressure sensor arranged in the pressure-side wheel side space of the centrifugal pump, which pressure sensor is connected to an evaluation device for determining the delivery rate.

Bei einer offenen Anlage sollten jeweils ein auf der Pumpensaugseite und im druckseitigen Radseitenraum angeordneter Drucksensor mit der Auswerteeinrichtung verbunden sein.In an open system, a pressure sensor arranged on the pump suction side and in the pressure-side wheel side space should each be connected to the evaluation device.

Das erfindungsgemäße Verfahren arbeitet zuverlässig und mit guter Genauigkeit, da der im druckseitigen Radseitenraum gemessene statische Druck annähernd eine stetig fallende Gerade über den gesamten Fördermengenverlauf ergibt. Es ist somit ein eindeutiger Zusammenhang zwischen dem gemessenen Druck und der Fördermenge gegeben.The inventive method works reliably and with good accuracy, since the static pressure measured in the pressure-side Radseitenraum results in approximately a steadily falling straight line over the entire flow rate history. It is thus given a clear relationship between the measured pressure and the flow rate.

Das erfindungsgemäße Verfahren bedarf nur eines vergleichsweise geringen Aufwandes für die Bestimmung der Fördermenge. Dennoch zeichnet es sich gegenüber den bekannten Verfahren durch eine höhere Genauigkeit aus. Dies gilt sowohl gegenüber der aufwendigen Differenzdruckmessung in sich ändernden Querschnitten als auch gegenüber den anderen geschilderten Verfahren, da sich durch eine Eliminierung von Hauptverluststrecken kein instabiler Verlauf der Kennlinie ergibt.The inventive method requires only a comparatively small effort for the determination of the flow rate. Nevertheless, it is distinguished from the known methods by a higher accuracy. This applies both to the complex differential pressure measurement in changing cross sections and compared to the other described methods, since eliminating an unstable course of the characteristic curve by eliminating main loss paths.

Die Erfindung wird anhand eines Ausführungsbeispiels näher erläutert. Die Zeichnung zeigt in

Fig.1
einen Meridianschnitt durch eine Kreiselpumpe und durch Teile einer Anlage, bei denen das erfindungsgemäße Verfahren benutzt wird;
Fig. 2
die Kennlinien zweier Kreiselpumpen und die zugehörigen Druckverläufe der jeweiligen Laufräder.
The invention will be explained in more detail with reference to an embodiment. The drawing shows in
Fig.1
a meridian section through a centrifugal pump and through parts of a plant in which the inventive method is used;
Fig. 2
the characteristics of two centrifugal pumps and the associated pressure profiles of the respective wheels.

Das Gehäuse 1 der in der Fig. 1 dargestellten Kreiselpumpe besitzt einen Einlaß 2 und einen Auslaß 3. Ein auf einer Welle 4 befestigtes Laufrad 5 ist in dem Gehäuse 1 angeordnet.The housing 1 in the Fig. 1 shown centrifugal pump has an inlet 2 and an outlet 3. A mounted on a shaft 4 impeller 5 is disposed in the housing 1. Die Welle 2 ist über eine Welle 4 an dem Gehäuse 1 angeordnet.

Im druckseitigen Radseitenraum 6 des Gehäuses 1 ist ein Drucksensor 7 vorgesehen, der über eine Leitung 8 mit einem Auswertegerät 9 verbunden ist. Ein weiterer - gestrichelt dargestellter - Drucksensor 10 ist vor dem Einlaß 2 des Gehäuses 1 angeordnet. Über eine - ebenfalls gestrichelt dargestellte - Leitung 11 ist der Drucksensor 10 mit dem Auswertegerät 9 verbunden. Der Drucksensor 10 ist in einer Rohrleitung 12 angeordnet, welche zu einem - hier nicht dargestellten - Tank führt. Es handelt sich hier also um ein offenes System.In the pressure-side Radseitenraum 6 of the housing 1, a pressure sensor 7 is provided, which is connected via a line 8 with an evaluation device 9. Another - shown in dashed lines - pressure sensor 10 is arranged in front of the inlet 2 of the housing 1. About a - also shown in dashed lines - line 11, the pressure sensor 10 is connected to the evaluation device 9. The pressure sensor 10 is arranged in a pipeline 12, which leads to a - not shown here - tank. So this is an open system.

Während des Laufs der Kreiselpumpe wird die in dem Tank befindliche Flüssigkeit über den Auslaß 3 zu einer - nicht dargestellten - Mündung gefördert. Da der abnehmende Flüssigkeitsspiegel im Tank zu einer entsprechenden fortgesetzten Druckabsenkung vor dem Einlaß 2 der Kreiselpumpe führt, muß die durch das Laufrad 5 verursachte Druckerhöhung durch eine Differenzdruckbildung der Werte der Sensoren 7 und 10 ermittelt werden. Eine den verschiedenen Fördermengen zuzuordnende Druckerhöhung des Laufrades 5 wird in einer Ursprungsmessung ermittelt und in dem Auswertegerät 9 gespeichert. Die gespeicherten Informationen werden bei der Bestimmung der Fördermenge herangezogen.During the run of the centrifugal pump, the liquid in the tank is conveyed via the outlet 3 to a - not shown - mouth. Since the decreasing liquid level in the tank leads to a corresponding continued pressure drop before the inlet 2 of the centrifugal pump, the pressure increase caused by the impeller 5 must be determined by a differential pressure formation of the values of the sensors 7 and 10. A pressure increase of the impeller 5 to be assigned to the different delivery quantities is determined in an original measurement and stored in the evaluation device 9. The stored information is used in the determination of the flow rate.

In einem geschlossenen Kreislauf kann auf die laufende Feststellung des vor dem Einlauf der Kreiselpumpe herrschenden Druckes verzichtet werden, da dieser sich während des Betriebes nur unwesentlich verändert. Hier genügt es, den Druck einmal zu bestimmen, um ihn dann dem Auswertegerät dauerhaft zur Verfügung zu stellen.In a closed circuit can be dispensed with the ongoing determination of the pressure prevailing before the inlet of the centrifugal pump pressure, since this changes only insignificantly during operation. Here it is sufficient to determine the pressure once, in order to make it permanently available to the evaluation device.

Aus der Fig. 2 ist der Zusammenhang zwischen der Fördermenge und dem Druckaufbau der Pumpe und des Laufrades zu ersehen. Den Kennlinien der Fig. 2 liegen Kreiselpumpen mit einem Laufrad zweier unterschiedlicher Abdrehdurchmesser zugrunde. So beziehen sich die Kennlinien 13 und 14 auf das erste Laufrad und die Kennlinien 15 und 16 auf das zweite Laufrad.From the Fig. 2 the relationship between the flow rate and the pressure build-up of the pump and the impeller can be seen. The characteristics of the Fig. 2 are based centrifugal pumps with an impeller of two different calibration diameters. Thus, the characteristics 13 and 14 relate to the first impeller and the characteristics 15 and 16 to the second impeller.

Die Kennlinien 13 und 15 sind Pumpenkennlinien, welche durch eine Differenzdruckmessung zwischen Saug- und Druckstutzen der Kreiselpumpen ermittelt wurden. Die Kennlinien 13 und 15 weisen einen instabilen Verlauf auf und sind daher für die Ermittlung der Fördermenge ungeeignet.The curves 13 and 15 are pump characteristics, which were determined by a differential pressure measurement between the suction and discharge nozzles of the centrifugal pumps. The characteristics 13 and 15 have an unstable course and are therefore unsuitable for determining the flow rate.

Die Kennlinien 14 und 16 sind Laufradkennlinien, welche durch einen Druckaufnehmer 7 ermittelt wurden. Ihr Verlauf ist eindeutig stabil. Daher sind diese Kennlinien für eine genaue Ermittlung der Fördermenge geeignet.The characteristic curves 14 and 16 are impeller characteristic curves, which were determined by a pressure sensor 7. Their course is clearly stable. Therefore, these characteristics are suitable for accurate determination of the flow rate.

Claims (7)

  1. Method for determining the delivery rate, furnished by an impeller, of a rotatory pump integrated into a conveying system, pressure measurements carried out within the conveying system being assigned in each case by means of evaluation logics to corresponding delivery rates established in an original measurement, characterized in that the pressure build-up, not impaired by influences of the pump casing (1), and of any guide devices, of the impeller (5) at a measuring point (7) located upstream of the inlet into flow-guiding elements is used in order to determine the delivery rate.
  2. Method according to Claim 1, characterized in that the pressure build-up of the impeller (5) is detected at a measuring point (7) located in the vicinity of the impeller outlet on the pump pressure side.
  3. Method according to Claim 1 or 2, characterized in that the pressure build-up of the impeller (5) is detected at a measuring point (7) located in the pressure-side impeller side space (6) of the rotatory pump.
  4. Method according to one of Claims 1 to 3 to be carried out in a plant having a constant suction-side plant pressure, characterized in that, in an original measurement, the pressures at the impeller (5) which are established in the case of various delivery rates are measured and are made available to an evaluation device (9).
  5. Method according to one of Claims 1 to 3 to be carried out in a plant having a variable suction-side plant pressure, characterized in that, in an original measurement, the pressures at the impeller (5) which are established in the case of various delivery rates are measured and are made available to an evaluation device (9), while the suction-side plant pressure is obtained from the plant data or is measured by means of a sensor (10).
  6. Device for carrying out a method according to one of Claims 1 to 4, characterized by a pressure sensor (7) which is arranged in the pressure-side impeller side space (6) of the rotatory pump and which is connected to an evaluation device (9) for determining the delivery rate.
  7. Device for carrying out a method according to one of Claims 1 to 3 and 5, characterized by in each case a pressure sensor (10, 7) which is arranged on the suction side and in the pressure-side impeller side space (6) of the rotatory pump and which is connected to an evaluation device (9) for determining the delivery rate.
EP01117988A 2000-08-16 2001-07-25 Measurement and control procedure for the instantaneous flow of a centrifugal pump Expired - Lifetime EP1180600B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CY20101100697T CY1110707T1 (en) 2000-08-16 2010-07-26 METHOD AND DEVICE FOR DETERMINING THE CENTRAL PUMP PROVIDER

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10039917 2000-08-16
DE10039917A DE10039917A1 (en) 2000-08-16 2000-08-16 Method and device for determining the delivery rate of a centrifugal pump

Publications (3)

Publication Number Publication Date
EP1180600A2 EP1180600A2 (en) 2002-02-20
EP1180600A3 EP1180600A3 (en) 2006-12-13
EP1180600B1 true EP1180600B1 (en) 2010-04-28

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EP01117988A Expired - Lifetime EP1180600B1 (en) 2000-08-16 2001-07-25 Measurement and control procedure for the instantaneous flow of a centrifugal pump

Country Status (7)

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EP (1) EP1180600B1 (en)
AT (1) ATE466194T1 (en)
CY (1) CY1110707T1 (en)
DE (2) DE10039917A1 (en)
DK (1) DK1180600T3 (en)
ES (1) ES2342819T3 (en)
PT (1) PT1180600E (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10359726A1 (en) * 2003-12-19 2005-07-14 Ksb Aktiengesellschaft quantity measurement
DE102009022107A1 (en) 2009-05-20 2010-11-25 Ksb Ag Method and device for determining the operating point of a work machine
EP2626567B2 (en) * 2012-02-08 2019-10-16 Grundfos Holding A/S Pump casing
DE102014006556B3 (en) * 2014-05-06 2015-02-19 Thomas Magnete Gmbh Pump unit with electric motor
DE102015215466A1 (en) * 2015-08-13 2017-02-16 Ksb Aktiengesellschaft Adjustment of the flow rate of a consumer

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1009927B (en) * 1954-02-06 1957-06-06 Demag Ag Method for determining and obtaining the operating point of the best efficiency in a flow machine with flow of the conveying means through a spiral
US4821580A (en) * 1988-01-27 1989-04-18 Jorritsma Johannes N Method and apparatus for calculating flow rates through a pumping station
US5129264A (en) * 1990-12-07 1992-07-14 Goulds Pumps, Incorporated Centrifugal pump with flow measurement
DE4330097A1 (en) * 1993-09-06 1995-03-09 Klein Schanzlin & Becker Ag Centrifugal pump housing with delivery rate measuring device
DE19544173C1 (en) * 1995-11-14 1997-06-05 Grundfos As Housing for a centrifugal pump
DE19851523C1 (en) * 1998-11-09 2000-05-18 Gauting Gmbh Apparatebau Fan for compressible delivery medium has arrangement for deriving volume flow from pressure, temperature and rotor speed measurement values

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Publication number Publication date
CY1110707T1 (en) 2015-06-10
DE10039917A1 (en) 2002-02-28
DK1180600T3 (en) 2010-08-16
EP1180600A2 (en) 2002-02-20
EP1180600A3 (en) 2006-12-13
ES2342819T3 (en) 2010-07-15
PT1180600E (en) 2010-07-01
DE50115457D1 (en) 2010-06-10
ATE466194T1 (en) 2010-05-15

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