EP1180600A2 - 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
EP1180600A2
EP1180600A2 EP01117988A EP01117988A EP1180600A2 EP 1180600 A2 EP1180600 A2 EP 1180600A2 EP 01117988 A EP01117988 A EP 01117988A EP 01117988 A EP01117988 A EP 01117988A EP 1180600 A2 EP1180600 A2 EP 1180600A2
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EP
European Patent Office
Prior art keywords
pressure
impeller
pump
centrifugal pump
delivery
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EP01117988A
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German (de)
French (fr)
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EP1180600B1 (en
EP1180600A3 (en
Inventor
Jürgen Gröschel
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KSB AG
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KSB AG
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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 by an impeller delivered volume of a centrifugal pump integrated in a conveyor system, wherein pressure measurements made within the conveyor system by a Evaluation logic in each case corresponding, determined in an original measurement Production quantities can be assigned.
  • This type of delivery quantity determination is basically from US 4,821,580 known.
  • the device taught there measures the pressure in the area in front of the suction line of a centrifugal pump and in its pressure line performed.
  • the pressures recorded are stored in a computer and possibly together with other inputs for the determination of certain Data, such as the delivery rate, evaluated.
  • the kind used here the measurement is comparable to determining the pump characteristic on a Test bench.
  • the invention has for its object a method of the aforementioned Kind and to create a device using this method, which when fulfilled the basic requirement of low effort also one unstable or flat pump characteristics, accurate determination of the delivery rate provide.
  • the task is solved in that for determining the delivery rate that of influences of the pump housing and any control devices Impaired pressure build-up of the impeller is used.
  • the solution according to the invention takes advantage of the fact that the impeller in comparison only slight losses to a pump housing or a control device caused. So there is no interference with the measurement Formation of an unstable characteristic.
  • the suction-side system pressure changes with the removal. Therefore this pressure must be taken into account when determining the delivery rate become. This can be done using known system data or using one on the Pump suction side arranged pressure sensor happen.
  • One for carrying out the method according to the invention in one closed circuit suitable device can with the help of an pressure side wheel side space of the centrifugal pump arranged pressure sensor, which with an evaluation device for determining the delivery rate connected, can be realized.
  • the method according to the invention works reliably and with good accuracy, since the static pressure measured in the pressure-side wheel side space is approximately results in a steadily falling straight line across the entire flow rate. It is thus a clear connection between the measured pressure and the Delivery rate given.
  • the method according to the invention requires only a comparatively small one Effort for determining the delivery rate. Still, it stands out compared to the known methods by a higher accuracy. this applies both changing compared to the complex differential pressure measurement Cross-sections as well as compared to the other methods described, since due to the elimination of main loss paths, no unstable course of the Characteristic results.
  • the housing 1 of the centrifugal pump shown in FIG. 1 has an inlet 2 and an outlet 3.
  • An impeller 5 attached to a shaft 4 is in the Housing 1 arranged.
  • a pressure sensor 7 is located in the pressure-side wheel side space 6 of the housing 1 provided, which is connected via a line 8 to an evaluation device 9.
  • a pressure sensor 10 is in front of the inlet 2 of the Housing 1 arranged. Via a line - also shown in dashed lines 11, the pressure sensor 10 is connected to the evaluation device 9.
  • the pressure sensor 10 is arranged in a pipeline 12, which to one - not here illustrated - tank leads. So this is an open system.
  • the liquid in the tank promoted via the outlet 3 to a - not shown - mouth. Since the decreasing liquid levels in the tank to a corresponding continued Pressure reduction in front of the inlet 2 of the centrifugal pump must be through the Impeller 5 causes pressure increase due to a differential pressure formation of the values of sensors 7 and 10 are determined.
  • One of the different flow rates attributable pressure increase of the impeller 5 is in an original measurement determined and stored in the evaluation device 9. The saved Information is used to determine the delivery rate.
  • FIG. 2 shows the relationship between the delivery rate and the Pressure build-up of the pump and the impeller can be seen.
  • the characteristic curves of FIG. 2 are centrifugal pumps with an impeller of two different ones Calibration diameter. So the characteristics 13 and 14 refer to the first impeller and the characteristic curves 15 and 16 on the second impeller.
  • the characteristic curves 13 and 15 are pump characteristic curves, which are determined by a differential pressure measurement determined between the suction and pressure ports of the centrifugal pumps were.
  • the characteristic curves 13 and 15 have an unstable course and are therefore unsuitable for determining the delivery rate.
  • the characteristic curves 14 and 16 are impeller characteristic curves which are represented by a Pressure transducers 7 were determined. Their course is clearly stable. Therefore are these characteristics are suitable for a precise determination of the delivery 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 by an impeller delivered volume of a centrifugal pump integrated in a conveyor system, wherein pressure measurements made within the conveyor system by a Evaluation logic in each case corresponding, determined in an original measurement Production quantities can be assigned.

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 delivery quantity determination is basically from US 4,821,580 known. The device taught there measures the pressure in the area in front of the suction line of a centrifugal pump and in its pressure line performed. The pressures recorded are stored in a computer and possibly together with other inputs for the determination of certain Data, such as the delivery rate, evaluated. The kind used here the measurement is comparable to determining the pump characteristic on a Test bench. A disadvantage of the fact that the influence of the pump housing in the Measurement flows in and this results in an unstable or flat characteristic. Due to the lack of uniqueness, this leads to inaccuracies in the Flow 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 delivery quantity determination is known from US Pat. No. 5,129,264. There is a differential pressure measurement between the inlet and the outlet the pressure connection of the centrifugal pump. The is used here The fact that the pressure of the flowing medium with the cross section of the Flow path changed, the measured pressures a conclusion allow the respective flow rate. The determined value is thus together with a flow constant in an evaluation logic to determine the current Flow rate used. The specifically taught in US 5,129,264 Execution also requires a certain amount of effort, since the Pressure ports for attaching a variety of measuring points are pierced got to. But because the distance between the measuring points is relatively short and the Cross-sectional changes are small, there are large inaccuracies in the Determination of the delivery 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.A comparable device is known from EP 0 641 997 B1, in which however, the necessary effort was reduced by only two Pressure measuring points are necessary when using a volute are advantageously arranged on the spur. However, this too Execution the disadvantage that the influence of the pump housing in the measurement flows in, so that the pump characteristic curve is unstable or flat the respective delivery rate cannot be determined clearly or only imprecisely.

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 a method of the aforementioned Kind and to create a device using this method, which when fulfilled the basic requirement of low effort also one unstable or flat pump characteristics, accurate determination of the delivery rate provide.

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 task is solved in that for determining the delivery rate that of influences of the pump housing and any control devices Impaired pressure build-up of the impeller is used.

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 takes advantage of the fact that the impeller in comparison only slight losses to a pump housing or a control device caused. So there is no interference with the measurement Formation of 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 advisable to build up the pressure of the impeller on one of the Pump pressure side near the impeller outlet and before entering flow-measuring elements to be located measuring point. Such a measuring point is expediently located in the pressure-side wheel side space the centrifugal pump arranged.

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.With constant suction-side system pressure, e.g. in a closed Circulation is given, it is sufficient if in an original measurement the different pressures on the impeller and be made available to an evaluation device. The influence of Flow velocity 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 Tanks, the suction-side system pressure changes with the removal. Therefore this pressure must be taken into account when determining the delivery rate become. This can be done using known system data or using one on the Pump suction side arranged pressure sensor happen.

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.One for carrying out the method according to the invention in one closed circuit suitable device can with the help of an pressure side wheel side space of the centrifugal pump arranged pressure sensor, which with an evaluation device for determining the delivery rate connected, can be realized.

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, one on the pump suction side and one in the pressure-side wheel side space arranged pressure sensor with the Evaluation device to be connected.

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 method according to the invention works reliably and with good accuracy, since the static pressure measured in the pressure-side wheel side space is approximately results in a steadily falling straight line across the entire flow rate. It is thus a clear connection between the measured pressure and the Delivery rate given.

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 method according to the invention requires only a comparatively small one Effort for determining the delivery rate. Still, it stands out compared to the known methods by a higher accuracy. this applies both changing compared to the complex differential pressure measurement Cross-sections as well as compared to the other methods described, since due to the elimination of main loss paths, no unstable course of the Characteristic results.

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 is explained in more detail using an exemplary embodiment. The drawing shows in
Fig.1
a meridian section through a centrifugal pump and through parts of a system in which the inventive method is used;
Fig. 2
the characteristics of two centrifugal pumps and the associated pressure profiles of the respective impellers.

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 of the centrifugal pump shown in FIG. 1 has an inlet 2 and an outlet 3. An impeller 5 attached to a shaft 4 is in the Housing 1 arranged.

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.A pressure sensor 7 is located in the pressure-side wheel side space 6 of the housing 1 provided, which is connected via a line 8 to an evaluation device 9. On another - shown in dashed lines - pressure sensor 10 is in front of the inlet 2 of the Housing 1 arranged. Via a line - also shown in dashed lines 11, the pressure sensor 10 is connected to the evaluation device 9. The pressure sensor 10 is arranged in a pipeline 12, which to one - not here illustrated - tank leads. 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 promoted via the outlet 3 to a - not shown - mouth. Since the decreasing liquid levels in the tank to a corresponding continued Pressure reduction in front of the inlet 2 of the centrifugal pump must be through the Impeller 5 causes pressure increase due to a differential pressure formation of the values of sensors 7 and 10 are determined. One of the different flow rates attributable pressure increase of the impeller 5 is in an original measurement determined and stored in the evaluation device 9. The saved Information is used to determine the delivery 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 cycle, the current finding of the before the Inlet of the centrifugal pump prevailing pressure, since this is only slightly changed during operation. The pressure is enough here to be determined once in order to then be permanently available to the evaluation device to deliver.

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.2 shows the relationship between the delivery rate and the Pressure build-up of the pump and the impeller can be seen. The characteristic curves of FIG. 2 are centrifugal pumps with an impeller of two different ones Calibration diameter. So the characteristics 13 and 14 refer to the first impeller and the characteristic curves 15 and 16 on 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 characteristic curves 13 and 15 are pump characteristic curves, which are determined by a differential pressure measurement determined between the suction and pressure ports of the centrifugal pumps were. The characteristic curves 13 and 15 have an unstable course and are therefore unsuitable for determining the delivery 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 are represented by a Pressure transducers 7 were determined. Their course is clearly stable. Therefore are these characteristics are suitable for a precise determination of the delivery rate.

Claims (7)

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, dadurch gekennzeichnet, daß zur Bestimmung der Fördermenge der von Einflüssen des Pumpengehäuses (1) und etwaiger Leiteinrichtungen nicht beeinträchtigte Druckaufbau des Laufrades (5) herangezogen wird.Method for determining the delivery rate of an impeller of a centrifugal pump integrated in a delivery system, whereby pressure measurements carried out within the delivery system are assigned by an evaluation logic respectively corresponding delivery rates determined in an original measurement, characterized in that for determining the delivery rate the influences of the pump housing ( 1) and any guide devices that do not affect the pressure build-up of the impeller (5). Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Druckaufbau des Laufrades (5) an einem auf der Pumpendruckseite in der Nähe des Laufradaustrittes und vor dem Eintritt in strömungsleitende Elemente gelegenen Meßpunkt (7) erfaßt wird.Method according to claim 1, characterized in that the pressure build-up of the impeller (5) is recorded at a measuring point (7) located on the pump pressure side in the vicinity of the impeller outlet and before it enters flow-guiding elements. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Druckaufbau des Laufrades (5) an einem im druckseitigen Radseitenraum (6) der Kreiselpumpe gelegenen Meßpunkt (7) erfaßt wird.Method according to claim 1 or 2, characterized in that the pressure build-up of the impeller (5) is recorded at a measuring point (7) located in the pressure-side wheel side space (6) of the centrifugal pump. Verfahren nach einem der Ansprüche 1 bis 3 zur Durchführung bei einer Anlage mit konstantem saugseitigen Anlagendruck, dadurch gekennzeichnet, daß in einer Ursprungsmessung die sich bei verschiedenen Fördermengen einstellenden Drücke am Laufrad (5) gemessen und einer Auswerteeinrichtung (9) zur Verfügung gestellt werden.Method according to one of claims 1 to 3 for implementation in a system with constant suction-side system pressure, characterized in that in an original measurement the pressures which arise at different delivery quantities are measured on the impeller (5) and are made available to an evaluation device (9). Verfahren nach einem der Ansprüche 1 bis 3 zur Durchführung bei einer Anlage mit veränderlichem saugseitigen Anlagendruck, dadurch gekennzeichnet, daß in einer Ursprungsmessung die sich bei verschiedenen Fördermengen einstellenden Drücke am Laufrad (5) gemessen werden und einer Auswerteeinrichtung (9) zur Verfügung gestellt werden, während der saugseitige Anlagendruck aus den Anlagedaten entnommen oder mittels eines Sensors (10) gemessen wird. Method according to one of claims 1 to 3 for implementation in a system with variable suction-side system pressure, characterized in that in an original measurement the pressures which arise at different delivery quantities are measured on the impeller (5) and are made available to an evaluation device (9), while the suction-side system pressure is taken from the system data or measured using a sensor (10). Vorrichtung zur Durchführung eines Verfahrens gemäß einem der Ansprüche 1 bis 4, gekennzeichnet durch einen im druckseitigen Radseitenraum (6) der Kreiselpumpe angeordneten Drucksensor (7), welcher mit einer Auswerteeinrichtung (9) zur Bestimmung der Fördermenge verbunden ist.Device for carrying out a method according to one of claims 1 to 4, characterized by a pressure sensor (7) arranged in the pressure-side wheel side space (6) of the centrifugal pump, which is connected to an evaluation device (9) for determining the delivery rate. Vorrichtung zur Durchführung eines Verfahrens gemäß einem der Ansprüche 1 bis 3 und 5, gekennzeichnet durch jeweils einen auf der Saugseite und im druckseitigen Radseitenraum (6) der Kreiselpumpe angeordneten Drucksensor (10, 7), welche mit einer Auswerteeinrichtung (9) zur Bestimmung der Fördermenge verbunden sind.Device for carrying out a method according to one of claims 1 to 3 and 5, characterized in each case by a pressure sensor (10, 7) which is arranged on the suction side and in the pressure-side wheel side space (6) of the centrifugal pump and which has an evaluation device (9) for determining the delivery rate are connected.
EP01117988A 2000-08-16 2001-07-25 Measurement and control procedure for the instantaneous flow of a centrifugal pump Expired - Lifetime EP1180600B1 (en)

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CY20101100697T CY1110707T1 (en) 2000-08-16 2010-07-26 METHOD AND DEVICE FOR DETERMINING THE CENTRAL PUMP PROVIDER

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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

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

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AT (1) ATE466194T1 (en)
CY (1) CY1110707T1 (en)
DE (2) DE10039917A1 (en)
DK (1) DK1180600T3 (en)
ES (1) ES2342819T3 (en)
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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

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US5129264A (en) 1990-12-07 1992-07-14 Goulds Pumps, Incorporated Centrifugal pump with flow measurement
EP0641997B1 (en) 1993-09-06 1998-01-14 KSB Aktiengesellschaft Centrifugal pump casing with throughput gauge

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CN104114873B (en) * 2012-02-08 2016-08-17 格兰富控股联合股份公司 Pump case

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CY1110707T1 (en) 2015-06-10
EP1180600B1 (en) 2010-04-28
DE10039917A1 (en) 2002-02-28
DK1180600T3 (en) 2010-08-16
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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