EP0864755B1 - Doppelpumpe mit Einzel- und Synchronbetrieb - Google Patents
Doppelpumpe mit Einzel- und Synchronbetrieb Download PDFInfo
- Publication number
- EP0864755B1 EP0864755B1 EP98104145A EP98104145A EP0864755B1 EP 0864755 B1 EP0864755 B1 EP 0864755B1 EP 98104145 A EP98104145 A EP 98104145A EP 98104145 A EP98104145 A EP 98104145A EP 0864755 B1 EP0864755 B1 EP 0864755B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- supply flow
- pumps
- speed
- procedure
- 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
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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
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
-
- 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
- F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
- F04D15/029—Stopping of pumps, or operating valves, on occurrence of unwanted conditions for pumps operating in parallel
Definitions
- the invention relates to a method for operating a double pump with a first pump for generating smaller flow rates Q kl at a predetermined differential pressure between the pump suction and the pump outlet side and a second pump that can be connected to the first pump to generate larger flow rates Q gr and one of the two pumps controlling pump control.
- Double pumps are well known from the prior art and are u.a. in Heating circuits are used to cover demand peaks of the pumped heating water to be able to. Modern double pumps are switched on by changing the speed constant or predetermined variable final pressure regulated.
- Two control concepts are used for the double pumps. At the first Control concept, the two pumps of the double pump over the entire Control area to cover the required flow synchronously, i.e. with the same Speed, operated. In the second concept, on the other hand, only one of the two is used first Pumps used to cover the required flow. Once this pump yours maximum speed has been reached, the second pump is switched on and is still covered larger flow rates continuously regulated, with the first pump still with maximum speed is running.
- the object of the invention is to improve the efficiency of a conventional double pump to improve without building the To change double pump.
- Figure 1 shows a head-flow diagram with drawn pumps and consumer characteristics for the two Control concepts known from the prior art.
- Figure 2 shows the for a certain constant head Power consumption of the two from the prior art known and explained control concepts for Double pump. It can be clearly seen that the required Performance to achieve a specific flow rate Q at small flow rates in synchronous operation (first Control concept) is larger than the load-dependent one Switch-on mode (second control concept), in which after The second pump reaches the maximum speed of the first pump Pump is switched on.
- the performance curves of the two Control concepts intersect as they grow Flow rates at flow rate Q *. With flow rates Q larger Q * is the power consumption of the synchronous operation of the Double pump significantly lower than that of the start-up mode The maximum speed of the first pump is reached.
- the Performance curves consequently coincide with very large ones Flow rates when both pumps are at maximum speed promote.
- Flow rate Q * is achieved that the power consumption P of Double pump up and down the lowest curve below the flow rate Q * of the two control concepts equivalent.
- the second pump is not switched on at the same flow rate as the switching off.
- the flow rate Q must be selected to generate a hysteresis greater than the shutdown flow rate Q ab .
- Figure 4 shows the power consumption of the first pump for a constant speed. It can be clearly seen that the Curve curve for flow rates Q greater than Q * flattened and at even larger flow rates is even falling. Anyn't external pressure sensor to determine the pressure difference between Pump suction and pump outlet side used, but would only the pump's internal speed parameters, power consumption and current consumption observed, so through the flat or falling up to the maximum flow Power consumption curve not determined with certainty when the maximum flow rate of the pump is reached.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Description
- Figur 1
- Ein Förderhöhe-Förderstrom-Diagramm für eine Doppelpumpe;
- Figur 2
- ein Leistungsaufnahme-Diagramm für eine Doppelpumpe im Synchron- sowie im lastabhängigen Zuschaltbetrieb;
- Figur 3
- ein Förderhöhe-Förderstrom-Diagramm für die erfindungsgemäße Doppelpumpe;
- Figur 4
- ein Leistungsaufnahme-Förderstrom-Diagramm für eine Pumpe der Doppelpumpe.
Claims (6)
- Verfahren zum Betrieb einer Doppelpumpe mit einer ersten Pumpe zur Erzeugung von kleineren Förderströmen Qkl bei vorgebbarem Differenzdruck zwischen der Pumpenansaug- und der Pumpenauslaßseite und einer zur ersten Pumpe zuschaltbaren zweiten Pumpe zur Erzeugung von größeren Förderströmen Qgr, und einer die beiden Pumpen steuernden Pumpensteuerung,
dadurch gekennzeichnet, daßdie Pumpensteuerung die Drehzahl der ersten Pumpe bis zum Erreichen eines bestimmten Förderstroms Q* kontinuierlich erhöht, wobei bis zum Erreichen des bestimmten Förderstroms Q* die zweite Pumpe ausgeschaltet ist, unddaß die Pumpensteuerung bei Erreichen des Förderstroms Q* die zweite Pumpe zur ersten Pumpe zuschaltet, und für alle Förderströme Q >= Q* (Q größer gleich Q*) beide Pumpen mit der gleichen Drehzahl fördern. - Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß ausgehend von einem Förderstrom Q > Q* (Q größer Q*), bei sinkendem Bedarf die Pumpensteuerung die zweite Pumpe abschaltet, sobald der von beiden Pumpen erzeugte Förderstrom Q ungefähr gleich Q* ist.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die zweite Pumpe bei einem Förderstrom Q*zu zugeschaltet und bei einem Förderstrom Q*ab abgeschaltet wird, wobei Q*zu > Q*ab ist.
- Verfahren nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß beim Zuschalten die Pumpensteuerung die Drehzahl der ersten Pumpe auf die Drehzahl der zweiten Pumpe absenkt, derart, daß der vor dem Zuschalten der zweiten Pumpe von der ersten Pumpe allein geförderte Förderstrom Q*zu nach dem Zuschalten von beiden Pumpen gemeinsam zu gleichen Teilen gefördert wird.
- Verfahren nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß beim Abschalten der zweiten Pumpe die Pumpensteuerung die Drehzahl der ersten Pumpe erhöht, derart, daß der von der ersten Pumpe geförderte Förderstrom gleich dem vor dem Abschalten der zweiten Pumpe von beiden Pumpen gemeinsam geförderte Förderstrom ist.
- Verfahren nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß der von der Doppelpumpe geförderte Förderstrom Q mittels der pumpeninternen Parameter Drehzahl, Stromaufnahme und verbrauchte Leistung ermittelbar ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19710675 | 1997-03-14 | ||
DE19710675A DE19710675B8 (de) | 1997-03-14 | 1997-03-14 | Doppelpumpe mit Einzel- und Synchronbetrieb |
Publications (4)
Publication Number | Publication Date |
---|---|
EP0864755A2 EP0864755A2 (de) | 1998-09-16 |
EP0864755A3 EP0864755A3 (de) | 2000-11-29 |
EP0864755B1 true EP0864755B1 (de) | 2003-08-13 |
EP0864755B2 EP0864755B2 (de) | 2011-03-16 |
Family
ID=7823427
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98104145A Expired - Lifetime EP0864755B2 (de) | 1997-03-14 | 1998-03-09 | Doppelpumpe mit Einzel- und Synchronbetrieb |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0864755B2 (de) |
DE (2) | DE19710675B8 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2469094A2 (de) | 2010-12-23 | 2012-06-27 | Wilo Se | Verfahren zum Betrieb eines Doppelpumpen- oder Multipumpenaggregates |
USD834068S1 (en) | 2017-01-27 | 2018-11-20 | S.A. Armstrong Limited | Control pump |
RU2740387C1 (ru) * | 2017-12-19 | 2021-01-13 | Ксб Се & Ко. Кгаа | Многонасосная установка и способ ее эксплуатации |
US11732719B2 (en) | 2017-01-27 | 2023-08-22 | S.A. Armstrong Limited | Dual body variable duty performance optimizing pump unit |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19958829C1 (de) * | 1999-11-30 | 2001-08-02 | Mannesmann Ag | Brennstoffzellensystem mit einer Vorrichtung zum Zuleiten von Brennstoff |
WO2007095537A1 (en) * | 2006-02-13 | 2007-08-23 | Ingersoll-Rand Company | Multi-stage compression system and method of operating the same |
DE102014222962A1 (de) | 2014-11-11 | 2016-05-12 | Ksb Aktiengesellschaft | Effizienter Betrieb von Mehrpumpenanlagen |
EP3421805A1 (de) * | 2017-06-30 | 2019-01-02 | Taco, Inc. | Selbstsensorische parallelsteuerung von pumpen |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3726606A (en) * | 1971-11-19 | 1973-04-10 | A Peters | Sump apparatus |
US3970413A (en) * | 1972-01-24 | 1976-07-20 | Francois Duveau | Fluid distribution apparatus and method |
US3775025A (en) * | 1972-02-02 | 1973-11-27 | Maher Corp | Constant pressure pumping unit |
DE3225141C2 (de) † | 1982-07-06 | 1984-12-20 | Grundfos A/S, Bjerringbro | Drehzahlgeregeltes Pumpenaggregat |
DE3238020A1 (de) * | 1982-10-13 | 1984-04-19 | Linde Ag, 6200 Wiesbaden | Vorrichtung zum foerdern einer fluessigkeit |
DE3918246A1 (de) * | 1989-06-05 | 1990-12-06 | Eggs Elektrotechnik | Druckerhoehungseinrichtung |
GB2253245B (en) * | 1991-02-28 | 1994-10-19 | Hamworthy Heating Ltd | Flow related control means for a pump |
DE4128390C1 (en) * | 1991-08-27 | 1992-12-24 | Loewe Pumpenfabrik Gmbh, 2120 Lueneburg, De | Rapid control appts. for fluid supply installation - has controller connected via digital communication line to pump motor regulators which provide setting signals for frequency converters |
-
1997
- 1997-03-14 DE DE19710675A patent/DE19710675B8/de not_active Revoked
-
1998
- 1998-03-09 EP EP98104145A patent/EP0864755B2/de not_active Expired - Lifetime
- 1998-03-09 DE DE59809242T patent/DE59809242D1/de not_active Expired - Lifetime
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2469094A2 (de) | 2010-12-23 | 2012-06-27 | Wilo Se | Verfahren zum Betrieb eines Doppelpumpen- oder Multipumpenaggregates |
DE102010055841A1 (de) | 2010-12-23 | 2012-06-28 | Wilo Se | Verfahren zum Betrieb eines Doppelpumpen- oder Multipumpenaggregates |
EP2469094A3 (de) * | 2010-12-23 | 2015-05-06 | Wilo Se | Verfahren zum Betrieb eines Doppelpumpen- oder Multipumpenaggregates |
USD834068S1 (en) | 2017-01-27 | 2018-11-20 | S.A. Armstrong Limited | Control pump |
USD839314S1 (en) | 2017-01-27 | 2019-01-29 | S.A. Armstrong Limited | Control pump |
USD839313S1 (en) | 2017-01-27 | 2019-01-29 | S.A. Armstrong Limited | Control pump |
USD839922S1 (en) | 2017-01-27 | 2019-02-05 | S.A. Armstrong Limited | Control pump |
US11732719B2 (en) | 2017-01-27 | 2023-08-22 | S.A. Armstrong Limited | Dual body variable duty performance optimizing pump unit |
US11965512B2 (en) | 2017-01-27 | 2024-04-23 | S.A. Armstrong Limited | Dual body variable duty performance optimizing pump unit |
RU2740387C1 (ru) * | 2017-12-19 | 2021-01-13 | Ксб Се & Ко. Кгаа | Многонасосная установка и способ ее эксплуатации |
Also Published As
Publication number | Publication date |
---|---|
EP0864755A2 (de) | 1998-09-16 |
DE19710675B4 (de) | 2012-01-12 |
EP0864755A3 (de) | 2000-11-29 |
DE19710675A1 (de) | 1998-09-17 |
EP0864755B2 (de) | 2011-03-16 |
DE19710675B8 (de) | 2012-03-29 |
DE59809242D1 (de) | 2003-10-02 |
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