EP3343032B1 - Dispositif d'entraînement pour une pompe à fluide - Google Patents

Dispositif d'entraînement pour une pompe à fluide Download PDF

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Publication number
EP3343032B1
EP3343032B1 EP17210615.5A EP17210615A EP3343032B1 EP 3343032 B1 EP3343032 B1 EP 3343032B1 EP 17210615 A EP17210615 A EP 17210615A EP 3343032 B1 EP3343032 B1 EP 3343032B1
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EP
European Patent Office
Prior art keywords
fluid pump
rotational speed
frequency converter
previous
technical data
Prior art date
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Active
Application number
EP17210615.5A
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German (de)
English (en)
Other versions
EP3343032A1 (fr
Inventor
Siegmund Alber
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.)
Hans Pregler Co KG GmbH
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Hans Pregler Co KG GmbH
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Publication of EP3343032A1 publication Critical patent/EP3343032A1/fr
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed

Definitions

  • the invention relates to a system with a fluid pump with a conveyor, which is designed to deliver a delivery volume with each revolution, and a method for operating a system with a fluid pump.
  • the system comprises a drive device with a drive motor for driving the conveyor at a speed.
  • variable-speed pumps Methods are known in which the energy efficiency of variable-speed pumps is improved.
  • the speed of the drive can be specified as a manipulated variable.
  • the control takes place on the pump itself.
  • External sensors e.g. to determine the volume flow or the delivery pressure.
  • DE 10 2012 016 780 A1 and DE 10 2011 050 017 A1 each describe a system with a fluid pump and a drive device according to the preamble of claim 1.
  • the fluid pump can in particular be an axial piston pump or radial piston pump.
  • the fluid pump can preferably be designed as a variable or control pump, i.e. the funding volume can be varied. In principle, however, the use of a constant pump is also conceivable.
  • the drive device comprises a frequency converter. While conventional pump arrangements are often operated by asynchronous motors operated directly on the network, in the present case a frequency converter is connected upstream of the drive motor.
  • frequency converter is to be understood broadly and includes any type of variable-speed control unit.
  • the drive device comprises a control device which is designed to determine a target speed without external sensors, ie without sensors, the target speed corresponding to a speed optimized for the overall efficiency of the drive device and the fluid pump.
  • the overall efficiency is considered according to the invention, i.e. from the energy supply at the inlet to the hydraulic power, e.g. Pressure and flow rate that is made available at the outlet.
  • the pressure can preferably always be maintained.
  • the pressure is in particular not adjusted.
  • target speed is to be understood broadly and includes, for example, a target speed range.
  • the target speed that is the speed at which the overall efficiency is high and energy is thus saved, can be achieved without external sensors such as sensors for determining the volume flow Delivery pressure or the swivel angle can be determined. Costs can be saved both in production and in maintenance.
  • the control device then controls the pump in particular with the determined target speed.
  • the possibility of the fluid pump in the control range is cut in order to achieve a high degree of efficiency.
  • the percentage energy saving is high, for example in hydraulic presses or individual units.
  • the target speed can only be determined on the basis of technical data of the drive motor, the frequency converter and / or the fluid pump. Alternatively or additionally, the target speed is stored in a memory.
  • the setpoint speed is consequently in particular calculated exclusively on the basis of technical data or determined on the basis of a data record stored in a memory. For example, measurements of the volume flow, the delivery pressure or the swivel angle are not provided for the calculation of the target speed.
  • the technical data include the output power of the drive motor, the operating pressure of the fluid pump, the delivery volume of the fluid pump, the actual speed from the frequency converter and / or the torque from the frequency converter to which regulation is taking place.
  • the optimal target speed can be calculated in each case by creating a control algorithm in the control device.
  • the swivel angle becomes almost full even in the partial load range, i.e. at least 80%, preferably at least 90%, particularly preferably at least 95%, pivoted out. This allows it to be kept at the best possible operating point.
  • the actual speed values provided by the frequency converter can also be used to calculate the target speed, for example.
  • the target speed is in particular proportional to the output power of the drive motor, preferably the power on the shaft, and the overall efficiency. Furthermore, the target speed is inversely proportional to the operating pressure and the delivery volume of the fluid pump per revolution.
  • the speed can be automatically adjusted by the control device for each partial load range.
  • the speed can e.g. can be reduced in order to optimally deflect a torkel disk or an inclined ring of a fluid pump and to improve the overall efficiency.
  • the drive motor is designed as a reluctance motor or as a synchronous servomotor.
  • a direct current, three-phase or asynchronous motor can also be provided.
  • the frequency converter has the control device. While conventional fluid pumps regulate themselves, the control device is not arranged in the fluid pump. Existing fluid pumps can also be retrofitted in a simple manner, since only a frequency converter with a corresponding control device has to be connected upstream. Alternatively, the control device can also be designed as a separate component.
  • control device is designed to determine a target speed for each partial load range.
  • the speed can thus be automatically adjusted for each partial load range, which means that the best overall efficiency is achieved for the respective partial load range.
  • control device comprises a memory or has access to a memory in which a data record is stored.
  • the data record can preferably be stored, for example, in the form of a table, a polyline or a map.
  • the data set includes target speeds in Dependency on torques from the frequency converter to which the regulation takes place.
  • the start and end are measured or determined empirically.
  • the system can be operated at a minimum speed and an excessive speed. Interpolation can be carried out between the measured or empirically determined data.
  • the control device selects from the data set the torque from the frequency converter to which it is regulated and determines in the data set the corresponding target speed at which the fluid pump is to be operated.
  • the invention also relates to a system with a drive device according to the invention and a fluid pump.
  • a drive device according to the invention
  • a fluid pump On the one hand, existing fluid pumps can be retrofitted with a drive device and, on the other hand, new overall systems can be manufactured.
  • the fluid pump is designed as an axial piston pump or a radial piston pump.
  • the invention relates to a method for operating a fluid pump with a drive device according to the invention, in which a target speed is determined without external sensors, that is to say without sensors, the target speed corresponding to a speed optimized for the overall efficiency of the drive device and the fluid pump.
  • the fluid pump is then operated at the corresponding target speed.
  • the speed can be reduced by determining the load profile to such an extent that the swivel angle of the fluid pump is operated at the optimal swivel angle with the maximum quantity delivered. This can be achieved, for example, by a set target speed, for example 950 revolutions per minute. This alone can increase the overall efficiency at this operating point by around 9%.
  • the speed can also be adjusted automatically.
  • the speed can be adjusted accordingly to automatically obtain the best overall efficiency in the respective partial load range.
  • a control algorithm can be used. This makes it possible to increase the overall efficiency by around 10%.
  • Fig. 1 shows a fluid pump 10, for example an axial piston or radial piston pump, and a drive motor 12, for example a reluctance or synchronous servo motor, which drives the fluid pump 10 at a specific speed.
  • a fluid pump for example an axial piston or radial piston pump
  • a drive motor 12 for example a reluctance or synchronous servo motor, which drives the fluid pump 10 at a specific speed.
  • the speed at which the fluid pump 10 is controlled is basically arbitrary. This can e.g. are in the range from 300 to 3,000 revolutions per minute, in particular 500 to 1,500 revolutions per minute.
  • a target speed can be determined via a frequency converter 14, which comprises a control device 16.
  • the drive motor 12 can be operated at the desired speed in order to increase an overall efficiency ⁇ of the arrangement.
  • Fig. 2 the overall efficiency ⁇ is shown as a function of the volume flow V in liters per minute.
  • Curve A shows the course of a conventional arrangement with an asynchronous motor which is operated directly from the network, ie without a frequency converter 14.
  • the overall efficiency ⁇ can increase by up to approx. 6% compared to a conventional arrangement.
  • Fig. 3 the overall efficiency ⁇ is shown as a function of the volume flow V in liters per minute. Curves A and S are shown again as a reference.
  • the rotational speed can be reduced by determining the load profile to such an extent that the swivel angle of the fluid pump 10 is operated at the optimal swivel angle with a maximum quantity delivered.
  • This can be achieved, for example, by a set target speed, e.g. 950 revolutions per minute. This means that the overall efficiency ⁇ can be increased by around 9% at this operating point.
  • the curves shown represent the course for different target speeds.
  • the curve S500 thus represents a target speed of 500 revolutions per minute.
  • the overall efficiency ⁇ is significantly increased, especially at low volume flows.
  • S600 corresponds to a target speed of 600 revolutions per minute, S700 to a target speed of 700 revolutions per minute, S800 to a target speed of 800 revolutions per minute, S900 to a target speed of 900 revolutions per minute and S1000 to a target speed of 1,000 revolutions per minute.
  • Fig. 4 the overall efficiency ⁇ is shown as a function of the volume flow V in liters per minute. Curves A and S are shown again as a reference.
  • the curve R corresponds to the course of the overall efficiency ⁇ , the setpoint speed being determined automatically with the aid of a control algorithm in the control device 16.
  • the actual speed values provided by the frequency converter can also be used to calculate the target speed, for example.
  • data from external sensors are not used to determine the respective target speed.
  • the target speed is particularly proportional to the output power of the drive motor 12 and the overall efficiency ⁇ . Furthermore, the target speed is inversely proportional to the operating pressure and the delivery volume of the fluid pump 10 per revolution.
  • the control device 16 can determine the optimal target rotational speed for each partial load range and automatically adapt it for the corresponding volume flow V.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Claims (15)

  1. Système comportant une pompe à fluide (10) pourvue d'un mécanisme de convoyage qui est réalisé pour convoyer un certain volume de refoulement à chaque tour, et comportant un dispositif d'entraînement pour la pompe à fluide (10), comprenant un moteur d'entraînement (12) pour entraîner le mécanisme de convoyage à une vitesse de rotation et un convertisseur de fréquence (14),
    caractérisé en ce que
    le dispositif d'entraînement comprend un dispositif de commande (16) qui est réalisé pour déterminer une vitesse de rotation de consigne sans capteurs, la vitesse de rotation de consigne correspondant à une vitesse de rotation optimisée par rapport au rendement global du dispositif d'entraînement et de la pompe à fluide (10), la vitesse de rotation de consigne pouvant être déterminée sur la base des seules données techniques du moteur d'entraînement (12), du convertisseur de fréquence (14) et/ou de la pompe à fluide (10), et/ou étant mémorisée dans une mémoire.
  2. Système selon la revendication 1,
    caractérisé en ce que
    la pompe à fluide (10) est réalisée sous forme de pompe à pistons axiaux ou de pompe à pistons radiaux.
  3. Système selon la revendication 1 ou 2,
    caractérisé en ce que
    les données techniques comprennent la puissance de sortie du moteur d'entraînement (12).
  4. Système selon l'une des revendications précédentes,
    caractérisé en ce que
    les données techniques comprennent la pression de service de la pompe à fluide (10).
  5. Système selon l'une des revendications précédentes,
    caractérisé en ce que
    les données techniques comprennent le volume de refoulement de la pompe à fluide (10).
  6. Système selon l'une des revendications précédentes,
    caractérisé en ce que
    les données techniques comprennent la vitesse de rotation réelle du convertisseur de fréquence (14).
  7. Système selon l'une des revendications précédentes,
    caractérisé en ce que
    les données techniques comprennent le couple de rotation du convertisseur de fréquence (14), couple par rapport auquel la régulation est effectuée.
  8. Système selon l'une des revendications précédentes,
    caractérisé en ce que
    le moteur d'entraînement (12) est réalisé sous forme de moteur à réluctance ou de servomoteur synchrone.
  9. Système selon l'une des revendications précédentes,
    caractérisé en ce que
    le convertisseur de fréquence (14) comprend le dispositif de commande (16).
  10. Système selon l'une des revendications précédentes,
    caractérisé en ce que
    le dispositif de commande (16) est réalisé pour déterminer une vitesse de rotation de consigne pour chaque plage de charge partielle.
  11. Système selon l'une des revendications précédentes,
    caractérisé en ce que
    le dispositif de commande (16) comprend une mémoire ou bien a accès à une mémoire dans laquelle est mémorisé un ensemble de données qui comprend les vitesses de rotation de consigne en fonction des couples de rotation du convertisseur de fréquence (14), couples par rapport auxquels la régulation est effectuée.
  12. Système selon la revendication 11,
    caractérisé en ce que
    l'ensemble de données est mémorisé sous la forme d'une ligne polygonale.
  13. Système selon la revendication 11,
    caractérisé en ce que
    l'ensemble de données est mémorisé sous la forme d'un tableau ou d'un champ caractéristique.
  14. Procédé pour faire fonctionner une pompe à fluide (10) pourvue d'un dispositif d'entraînement d'un système selon l'une des revendications 1 à 13, dans lequel
    une vitesse de rotation de consigne est déterminée sans capteurs, la vitesse de rotation de consigne correspondant à une vitesse de rotation optimisée par rapport au rendement global du dispositif d'entraînement et de la pompe à fluide (10),
    la vitesse de rotation de consigne est déterminée sur la base des seules données techniques du moteur d'entraînement (12), du convertisseur de fréquence (14) et/ou de la pompe à fluide (10), et/ou est mémorisée dans une mémoire.
  15. Procédé selon la revendication 14,
    caractérisé en ce que
    l'on n'adapte pas la pression.
EP17210615.5A 2016-12-29 2017-12-27 Dispositif d'entraînement pour une pompe à fluide Active EP3343032B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016125837.7A DE102016125837A1 (de) 2016-12-29 2016-12-29 Antriebsvorrichtung für eine Fluidpumpe

Publications (2)

Publication Number Publication Date
EP3343032A1 EP3343032A1 (fr) 2018-07-04
EP3343032B1 true EP3343032B1 (fr) 2020-04-01

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EP17210615.5A Active EP3343032B1 (fr) 2016-12-29 2017-12-27 Dispositif d'entraînement pour une pompe à fluide

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EP (1) EP3343032B1 (fr)
DE (1) DE102016125837A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19630384A1 (de) * 1996-07-29 1998-04-23 Becker Kg Gebr Verfahren zur Steuerung oder Regelung eines Aggregats und Frequenzumwandler
CN101033748B (zh) * 2006-03-08 2013-07-24 Itt制造企业公司 不使用传统传感器的确定泵流量的方法
DE102011050017A1 (de) * 2011-04-29 2012-10-31 Allweiler Gmbh Steuermittel zum Ansteuern eines Frequenzumrichters sowie Ansteuerverfahren
DE102012016780B4 (de) * 2012-06-01 2021-07-22 Robert Bosch Gmbh Verfahren zum Betreiben einer Fluidpumpe
DE102014004336A1 (de) * 2014-03-26 2015-10-01 Wilo Se Verfahren zur Bestimmung des hydraulischen Arbeitspunktes eines Pumpenaggregats

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
DE102016125837A1 (de) 2018-07-05
EP3343032A1 (fr) 2018-07-04

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