EP2831345A1 - Procédé pour commander un groupe pompe - Google Patents

Procédé pour commander un groupe pompe

Info

Publication number
EP2831345A1
EP2831345A1 EP13719012.0A EP13719012A EP2831345A1 EP 2831345 A1 EP2831345 A1 EP 2831345A1 EP 13719012 A EP13719012 A EP 13719012A EP 2831345 A1 EP2831345 A1 EP 2831345A1
Authority
EP
European Patent Office
Prior art keywords
speed
pump unit
value
volume flow
qsoii
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
EP13719012.0A
Other languages
German (de)
English (en)
Other versions
EP2831345B1 (fr
Inventor
Ulrich Diekmann
Olaf Klare
Frank Kleine-Benne
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 SE
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
Application filed by Wilo SE filed Critical Wilo SE
Publication of EP2831345A1 publication Critical patent/EP2831345A1/fr
Application granted granted Critical
Publication of EP2831345B1 publication Critical patent/EP2831345B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/22—Adaptations of pumping plants for lifting sewage
    • 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
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • F04D15/0236—Lack of liquid level being detected by analysing the parameters of the electric drive, e.g. current or power consumption

Definitions

  • the invention relates to a pump unit for a
  • the lifting system works automatically depending on the degree of filling of the collecting container, in which case a level detection, for example with a float, can activate the system and optionally also deactivate it. This means that the pump unit of the lifting system is turned on now and then and operated for a comparatively short time, namely, until the collecting tank is emptied to a structurally related, remaining residual volume.
  • Pump unit must have at least the power unit is selected according to its performance and installed in the system.
  • Wastewater lifting plants are not used because the waste water collection line, in which the wastewater is to be pumped, part of an open system and thus is pressureless.
  • Flow rate results.
  • the diameter is the expert in the Installation known.
  • the pump set then keeps the given volume flow constant. Problems caused by incorrect operating points, such as cavitating operation, flap impacts, flow noise and / or premature failure of the system, are thereby effectively avoided.
  • volume flow setpoint value may be carried out by a person skilled in the art preferably via an input means on the pump unit, for example via a
  • the pump unit may have a control to which the desired volume flow is then predefinable or predetermined, and which adjusts the target volume flow accordingly.
  • the input means may then be correspondingly present on this controller.
  • the control can structurally form a unit with the pump unit, in particular with the electric motor of the
  • Each value of said pump unit size together with the respective speed value defines a specific operating point of the pump unit in the HQ diagram.
  • the table according to the invention is factory in the
  • the pump unit in particular the controller thus compares the determined, in particular measured value of the size with the value expected at the set speed and increases the speed of the pump set, if this value is less than the expected, ie assigned value. Operation of the
  • Target reference value to be approached This has the advantage that the target volume flow can be set directly. A time-consuming and computational comparison of values can then be completely eliminated. Furthermore, this variant has the advantage that the set target operating point in each operation is the same, regardless of the media consistency or density of the liquid to be pumped, which can vary considerably, especially in domestic wastewater in a lifting plant. The pump unit is therefore also capable of learning in this respect and optimizes its operation automatically.
  • the corner speed can thus be determined at a startup of the pump unit such that it is checked at each set speed, whether the value of the size corresponds to that value at the set speed the Volume flow zero is assigned, that should be present at a flow rate of zero. This is the case below the corner speed. Will be the first one
  • Switching off the pump unit in conventional lifting systems is usually level controlled, i. depending on the level of in the
  • the determined volume flow over time can be integrated.
  • the correspondingly run operating points of the pump set are determined from the table and from this a system curve is determined, which is displayed on a display.
  • the display can also be the aforementioned display. This idea is based on the knowledge that the system loss curve is determined by a quadratic mathematical relationship between total delivery and volume flow. Already two points are enough to clearly define this curve, however, several operating points, i. corresponding size values are used for the determination of the system loss curve,
  • a pump unit for conveying a fluid via a pressure line into a collecting line is furthermore proposed, which is set up to carry out the method according to the invention.
  • the pump unit can be specified by him to be conveyed desired volume flow. It is arranged to automatically adjust its volume flow according to the specification on the basis of a physical size of the pump set, the size being the current taken up by the pump set or a variable dependent thereon. Again, a dependent of the absorbed electric current size as explained above, for example, the electrical or mechanical power of the pump unit, the winding temperature or the gradient of
  • Collecting container for collecting liquid and the pump unit by means of which the liquid in the collecting container can be raised via the pressure line into the manifold, wherein at least the highest point of the pressure line is higher in geodetical than the collecting container.
  • the pump unit may further comprise a frequency converter to which the controller for setting a certain speed, a specific frequency can be predetermined. Furthermore, the pump unit can have a pump and an electronically commutated synchronous motor or an asynchronous motor that drives the pump. Electric motor and pumps form structurally a unit.
  • the electronically commutated Synchronmotbr has a permanent magnetic rotor. It can also be powered by a frequency converter. In this
  • the controller can be set up in such a way that it increases the frequency if the current consumed is less than the current assigned to the predetermined volume flow according to the control characteristic or according to the table. Further, the controller may be configured to reduce the frequency when the current consumed is greater than that
  • predetermined volume flow according to the table associated current value.
  • FIG. 6a-6d flowcharts according to variants of the invention
  • the pump unit 4, 7 comprises an electric motor 7 and a pump 4 driven by it.
  • the electric motor 7 is commutated electronically
  • Total head and / or the system loss curve can be displayed.
  • Pulse width modulated (PWM) signal of a certain frequency f the electronic switches, such as transistors or thyristors, of the
  • Lifting plant 1 Shown are 21 exemplary speed characteristics on which the speed ni to n 2 i is constant.
  • the speed differences An n_i + 1 - n_i are equidistant.
  • Pump unit 4, 7 be specified differently in the table. If no current value is specified, this can be regarded as "nan" (not a number). Alternatively, negative current values, for example -1, may be included. In this way, it can be determined by a simple If query whether a current value at Qs 0 ii at the set speed nj is present. If not, the count variable i is incremented by one. For the case according to the table in FIG. 5a, a plausible current value is present only at the speed with the index 7. This is also understood with reference to FIG. 4, from which it is clear that at least this speed would have to be set in order to achieve a volume flow of 12 m 3 / h at a delivery height of 0 m. Then, this minimum speed n_7 is used as the first speed and set in the pump unit 4, 7, see step 28.
  • the measured current consumption for the first five rotational speed values corresponds to a volume flow rate of 0 m 3 / h.
  • a current value is present, which is no longer associated with a current value at zero flow, ie, which is associated with a volume flow Q greater than zero.
  • the point at which the volume flow is for the first time greater than zero is thus between n5 and n6 (corner speed).
  • the delivery height at this point corresponds to the geodetic head.
  • the speed n6 can be taken as the corner speed, because the system loss curve at low volume flows is flat. At this operating point corresponds to the
  • the duration T H L of the run-up is determined by the speed of the electronics, which must measure the current and compare it with the stored current value. If this happens quickly, the next speed levels can be set quickly one after the other.
  • the shorter ramp-up time in FIG. 7b is due to the fact that the
  • Start-up phase and holding phase can correspond. If this operating time is known, the start of the phase-out phase can be determined in dependence on it.
  • the minimum volume flow Q out or the switch-off speed n_7 can be specified manually or be determined on the basis of the known og corner speed, for example, as the 1, 1 to 1, 5 times this corner speed.
  • the known og corner speed for example, as the 1, 1 to 1, 5 times this corner speed.
  • Speed characteristic of speed n 7 ends with the system loss curve. At the latest, however, the pump set can start at or after reaching the corner speed be turned off, because then no flow is present anyway and the closing member of the backflow preventer, ie the check valve is closed.
  • the pump unit 4, 7 set a predetermined volume flow QSOLL regardless of the height difference between the sump 2 and the sewer manifold 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)

Abstract

L'invention concerne un procédé pour commander un groupe pompe, en particulier pour une installation de levage (1), destiné à propulser un liquide, par l'intermédiaire d'une conduite de pression (5), dans une conduite collectrice (6), procédé dans lequel le groupe pompe (4, 7) règle automatiquement un débit volumique de consigne prédéterminé (QSOLL) parmi une pluralité de débits volumiques de consigne pouvant être prédéterminés, sur la base d'une grandeur physique (I_ist) du groupe pompe (4, 7), la grandeur (I_ist) étant le courant (I_ist) absorbé par le groupe pompe (4, 7) et/ou une grandeur qui en dépend. Dans le groupe pompe (4, 7), est mémorisé un tableau dans lequel, pour chaque débit volumique de consigne (Qsoll) pouvant être prédéterminé, à chacun de plusieurs nombres de tours discrets (n_i), est associée une valeur (l(n_i, Q)) de la grandeur qui correspond à un point de fonctionnement (HIST, QIST) prédéterminé du groupe pompe (4, 7) qui est déterminé par le nombre de tours correspondant (n_i) et par le débit volumique de consigne correspondant (Qsoll). Le débit volumique (QIST) du groupe pompe (4, 7) est réglé sur la base de ce tableau en ce sens que le nombre de tours est réglé de telle sorte que la grandeur (I_ist) correspond essentiellement à une valeur (l(n_i, Qsoll)) déterminée, associée au débit volumique de consigne prédéterminé (QSOLL). Par ailleurs, l'invention concerne un groupe pompe et une installation de levage qui sont agencés chacun pour la conduite du procédé.
EP13719012.0A 2012-03-30 2013-03-28 Procédé pour actionner un dispositif de pompage Active EP2831345B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012006444A DE102012006444A1 (de) 2012-03-30 2012-03-30 Verfahren zum Betreiben eines Pumpenaggregats
PCT/EP2013/000945 WO2013143702A1 (fr) 2012-03-30 2013-03-28 Procédé pour commander un groupe pompe

Publications (2)

Publication Number Publication Date
EP2831345A1 true EP2831345A1 (fr) 2015-02-04
EP2831345B1 EP2831345B1 (fr) 2020-06-03

Family

ID=48190896

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13719012.0A Active EP2831345B1 (fr) 2012-03-30 2013-03-28 Procédé pour actionner un dispositif de pompage

Country Status (3)

Country Link
EP (1) EP2831345B1 (fr)
DE (1) DE102012006444A1 (fr)
WO (1) WO2013143702A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016109907A1 (de) * 2016-05-27 2017-11-30 Bilfinger Water Technologies Gmbh Verfahren zum Betrieb einer Vakuumpumpe sowie Vakuumpumpenanordnung
DE102019118314A1 (de) * 2019-06-11 2020-12-17 Kessel Ag Abscheidervorrichtung mit sensorisch gesteuerter Dosiervorrichtung
DE102020105670A1 (de) 2020-03-03 2021-09-09 KSB SE & Co. KGaA Druckerhöhungsanlage zur Erhöhung des Versorgungsdrucks in der Wasserversorgung wenigstens einer Entnahmestelle oder eines hydraulischen Verbrauchers
DE102020133760A1 (de) 2020-12-16 2022-06-23 Leistritz Pumpen Gmbh Verfahren zur Förderung eines Fluids durch eine Schraubenspindelpumpe und Schraubenspindelpumpe
CN114320867B (zh) * 2022-03-15 2022-05-24 河北建投水务投资有限公司 一种供水泵组变频调速智能化运行方法及系统
DE102022113913A1 (de) 2022-06-02 2023-12-07 Liebherr-Aerospace Lindenberg Gmbh Vorrichtung und Verfahren zur Zustandsüberwachung einer Elektromotorpumpe

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DE3225141C2 (de) * 1982-07-06 1984-12-20 Grundfos A/S, Bjerringbro Drehzahlgeregeltes Pumpenaggregat
DE3402120A1 (de) * 1984-01-23 1985-07-25 Rheinhütte vorm. Ludwig Beck GmbH & Co, 6200 Wiesbaden Verfahren und vorrichtung zur regelung verschiedener betriebsparameter bei pumpen und verdichtern
DE3824057A1 (de) * 1988-07-15 1990-01-25 Loewe Pumpenfabrik Gmbh Verfahren zur regelung des betriebes von pumpen
AT405996B (de) * 1993-07-09 2000-01-25 Rudin Franz Verfahren zur regelung der drehzahl eines elektromotors und vorrichtung zur durchführung des verfahrens
DE19525887C2 (de) * 1995-07-15 2002-06-27 Grundfos As Verfahren zur Anpassung des hydraulischen Leistungsfeldes eines Kreiselpumpenaggregates an die Erfordernisse einer Heizungsanlage
JP3922760B2 (ja) * 1997-04-25 2007-05-30 株式会社荏原製作所 流体機械
EP1286458A1 (fr) * 2001-08-22 2003-02-26 Pumpenfabrik Ernst Vogel Gesellschaft m.b.H. Méthode et dispositif pour commander une machine rotative
US8602745B2 (en) * 2004-08-26 2013-12-10 Pentair Water Pool And Spa, Inc. Anti-entrapment and anti-dead head function
DE102005027091A1 (de) * 2005-06-11 2006-12-14 Ksb Ag Betriebsverfahren für eine Abwasserhebeanlage und mit diesem Verfahren betriebene Anlage
DE102009050083B4 (de) * 2009-10-20 2016-08-18 Viessmann Werke Gmbh & Co Kg Verfahren zur Bestimmung eines Volumenstroms in einer mit einer Strömungsmaschine und mit einer Regelungseinheit versehenen, geschlossenen Strömungsanlage

Non-Patent Citations (1)

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See references of WO2013143702A1 *

Also Published As

Publication number Publication date
EP2831345B1 (fr) 2020-06-03
WO2013143702A1 (fr) 2013-10-03
DE102012006444A1 (de) 2013-10-02

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