EP0864755A2 - Double pompe à fonctionnement séquentiel ou synchrone - Google Patents

Double pompe à fonctionnement séquentiel ou synchrone Download PDF

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Publication number
EP0864755A2
EP0864755A2 EP98104145A EP98104145A EP0864755A2 EP 0864755 A2 EP0864755 A2 EP 0864755A2 EP 98104145 A EP98104145 A EP 98104145A EP 98104145 A EP98104145 A EP 98104145A EP 0864755 A2 EP0864755 A2 EP 0864755A2
Authority
EP
European Patent Office
Prior art keywords
pump
double
flow rate
switched
pumps
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.)
Granted
Application number
EP98104145A
Other languages
German (de)
English (en)
Other versions
EP0864755B1 (fr
EP0864755B2 (fr
EP0864755A3 (fr
Inventor
Jürgen Resch
Jürgen Hübner
Hunnekuhl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wilo SE
Original Assignee
Wilo GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7823427&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0864755(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Wilo GmbH filed Critical Wilo GmbH
Publication of EP0864755A2 publication Critical patent/EP0864755A2/fr
Publication of EP0864755A3 publication Critical patent/EP0864755A3/fr
Publication of EP0864755B1 publication Critical patent/EP0864755B1/fr
Application granted granted Critical
Publication of EP0864755B2 publication Critical patent/EP0864755B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 double pump with a first pump for generating smaller flow rates Q kl at a predeterminable differential pressure between the pump suction and the pump outlet side and a second pump that can be connected to the first pump for generating larger flow rates Q gr and a pump control that controls the two pumps.
  • Double pumps are well known from the prior art and are among others used in heating circuits to Cover demand peaks of the pumped heating water can. Modern double pumps are made by changing the Speed at constant or predetermined variable final pressure regulated.
  • Two control concepts are used for the double pumps Commitment.
  • the two pumps the double pump covering the entire control range of the required flow rate synchronously, i.e. with the same Speed, operated.
  • the second concept is first only one of the two pumps to cover the required Flow used. Once this pump reaches its maximum Speed has reached, the second pump is switched on and continuously to cover even larger flows up-regulated, the first pump still with maximum Speed 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.
  • Such a control has the advantage that the two pumps the double pump is closer to yours in almost the entire delivery area Promote each efficiency optimum, so that this the overall efficiency of the double pump according to the invention elevated.
  • Such operation of the double pump still has the Advantage that without a separate pressure sensor, only by Acquisition and evaluation of the pump's internal speed parameters, Current and power consumed, good control accuracy can be reached.
  • This control accuracy is therefore guaranteed because the activation of the second pump in one Area in which the power consumption falls with increasing Flow rate of the first pump rises steep enough so that a change in performance can be determined with sufficient accuracy and thus when the flow rate Q * is reached, the second pump is switched on can be.
  • This is the case with known double pumps, which are not operated by means of the second control concept guaranteed because in the range of the maximum speed Performance curve is flat or falling and through the Observation of the power consumption of the first pump of the Switch-on point of the second pump is not sufficiently precise can be determined.
  • Figure 1 shows a delivery head-flow rate 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 pumps. 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 that of the load-dependent one Switch-on operation (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 are consistent 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 corresponds.
  • 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 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 of the pump is reached.
EP98104145A 1997-03-14 1998-03-09 Double pompe à fonctionnement séquentiel ou synchrone Expired - Lifetime EP0864755B2 (fr)

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 true EP0864755A2 (fr) 1998-09-16
EP0864755A3 EP0864755A3 (fr) 2000-11-29
EP0864755B1 EP0864755B1 (fr) 2003-08-13
EP0864755B2 EP0864755B2 (fr) 2011-03-16

Family

ID=7823427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98104145A Expired - Lifetime EP0864755B2 (fr) 1997-03-14 1998-03-09 Double pompe à fonctionnement séquentiel ou synchrone

Country Status (2)

Country Link
EP (1) EP0864755B2 (fr)
DE (2) DE19710675B8 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1984628A1 (fr) * 2006-02-13 2008-10-29 Ingersoll-Rand Company Systeme de compression a plusieurs etages et son procede d'actionnement
EP3421805A1 (fr) * 2017-06-30 2019-01-02 Taco, Inc. Pompes de commande parallèle à auto-détection

Families Citing this family (6)

* Cited by examiner, † Cited by third party
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
DE102010055841A1 (de) 2010-12-23 2012-06-28 Wilo Se Verfahren zum Betrieb eines Doppelpumpen- oder Multipumpenaggregates
DE102014222962A1 (de) 2014-11-11 2016-05-12 Ksb Aktiengesellschaft Effizienter Betrieb von Mehrpumpenanlagen
WO2018137019A1 (fr) 2017-01-27 2018-08-02 S. A. Armstrong Limited Ensemble pompe d'optimisation de rendement à service variable et à double corps
CA172776S (en) 2017-01-27 2017-10-23 S A Armstrong Ltd Control pump
DE102017223189A1 (de) 2017-12-19 2019-06-19 KSB SE & Co. KGaA Mehrpumpenanlage und Verfahren zu deren Betrieb

Family Cites Families (8)

* Cited by examiner, † Cited by third party
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1984628A1 (fr) * 2006-02-13 2008-10-29 Ingersoll-Rand Company Systeme de compression a plusieurs etages et son procede d'actionnement
EP1984628B1 (fr) * 2006-02-13 2014-12-17 Ingersoll-Rand Company Systeme de compression a plusieurs etages et son procede d'actionnement
EP3421805A1 (fr) * 2017-06-30 2019-01-02 Taco, Inc. Pompes de commande parallèle à auto-détection
US10844862B2 (en) 2017-06-30 2020-11-24 Taco, Inc. Self-sensing parallel control of pumps

Also Published As

Publication number Publication date
DE19710675B8 (de) 2012-03-29
EP0864755B1 (fr) 2003-08-13
EP0864755B2 (fr) 2011-03-16
EP0864755A3 (fr) 2000-11-29
DE19710675B4 (de) 2012-01-12
DE59809242D1 (de) 2003-10-02
DE19710675A1 (de) 1998-09-17

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