EP1055071A1 - Dispositif de reglage d'une pompe a membrane - Google Patents

Dispositif de reglage d'une pompe a membrane

Info

Publication number
EP1055071A1
EP1055071A1 EP99950623A EP99950623A EP1055071A1 EP 1055071 A1 EP1055071 A1 EP 1055071A1 EP 99950623 A EP99950623 A EP 99950623A EP 99950623 A EP99950623 A EP 99950623A EP 1055071 A1 EP1055071 A1 EP 1055071A1
Authority
EP
European Patent Office
Prior art keywords
speed
curve
actual signal
pump
frequency
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
EP99950623A
Other languages
German (de)
English (en)
Other versions
EP1055071B1 (fr
Inventor
Goerdt Abel
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.)
Abel GmbH and Co KG
Original Assignee
Abel GmbH and Co KG
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 Abel GmbH and Co KG filed Critical Abel GmbH and Co KG
Publication of EP1055071A1 publication Critical patent/EP1055071A1/fr
Application granted granted Critical
Publication of EP1055071B1 publication Critical patent/EP1055071B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • F04B2203/00—Motor parameters
    • F04B2203/02—Motor parameters of rotating electric motors
    • F04B2203/0207—Torque
    • 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
    • F04B2207/00—External parameters
    • F04B2207/04—Settings
    • F04B2207/044—Settings of the rotational speed of the driving motor

Definitions

  • the invention relates to a control device for a diaphragm pump according to claim 1.
  • Diaphragm pumps are used in a variety of ways. They are operated either mechanically or hydraulically. They are used to load filter presses or similar consumers, such as. B. spray tower loads and the like.
  • a pressure transmitter is assigned to the line between the pump and filter press, the output signal of which is sent to a programmable logic controller.
  • a programmable logic controller This creates according to a predetermined program, the corresponding control signal for the frequency converter for adapting the speed of the drive motor to the pressure conditions by changing the output frequency of the converter.
  • Programmable logic controllers as are required for such speed controls, are relatively complex.
  • the invention has for its object to provide a control device for a diaphragm pump, which works with minimal equipment.
  • An electric drive motor in particular a three-phase asynchronous motor, drives the diaphragm pump.
  • the drive motor is supplied via a frequency converter which is variable in frequency and which in turn is connected to the network, for example a 50 or 60 Hz network.
  • the frequency converter has an analog output at which a signal is present, for example a current that is representative of the respective motor torque.
  • a speed setpoint generator which does not specify a constant speed value, but rather a setpoint curve which is stored in the speed setpoint generator.
  • the curve consists of a constant branch, which corresponds to a maximum speed. Since the If the output of the frequency converter is passed to the input of the speed setpoint generator via an inverter, a small signal (motor torque) at the output leads to a large signal (motor speed) at the input of the speed setpoint generator. In other words, for relatively small torques, the speed setpoint generator specifies a maximum speed value. This may well be higher than, for example, such as is achieved at 50 or 60 Hertz. You can even specify a speed value that corresponds to a frequency of 130 Hz, for example.
  • Such a speed setpoint is continued until the torque reaches a critical value. This corresponds to an operating phase in which the consumer pressure has reached the process's cut-off pressure. From this point on, the speed setpoint is moved along a predefined, falling curve, preferably along a straight line. The course of the falling curve or straight line is such that a desired consumer pressure or pressure curve is obtained. As is known, this depends on the respective operating state of the consumer, for example a filter press.
  • the falling curve is followed to a minimum speed, which is then kept constant, for example at a value at which the electric motor is still running smoothly. This corresponds to a speed of 2.0 rpm, for example.
  • the device according to the invention also contains an attenuator. This ensures that the periodic fluctuations in the actual signal which inevitably occur in a diaphragm pump are damped to such an extent that a processable signal is obtained.
  • the device according to the invention has the advantage that it can use a conventional frequency converter which can only be minimally supplemented by corresponding circuit parts. External control and regulating devices are not required. In particular, a pressure transducer can be completely eliminated for control purposes. In practice it has been found that it is readily possible with the invention to react proportionally to the sludge pressure building up in the filter press via the torque of the motor.
  • Fig. 1 shows schematically a block diagram according to the invention.
  • FIG. 2 shows a diagram of the pressure and speed curve for a filter press feed with a device according to FIG. 1.
  • the 1 shows a diaphragm pump 18 which is driven by a three-phase motor 16.
  • the three-phase motor 16 is connected to the mains via a frequency converter 21.
  • the frequency of the motor can be changed between 2 Hz and 130 Hz.
  • the motor currents determined in an inverter 20 are ascertained and appear at an analog output 22 as actual signals for the torque of the motor 16.
  • the signal is a current signal which moves between 0 and 21 mA. Current 0 means infinitely small torque and maximum current means maximum torque.
  • the signal at output 22 swells accordingly.
  • An attenuator 23 ensures a speaking equalization of the actual signal.
  • the damping of the actual signal is preferably carried out with a filter time constant, for example 8 seconds. At the same time, an adjustment to the respective pump size can be achieved with this constant.
  • the actual signal is sent from the output 22 via a line 24 to the input of an inverter 28, which in turn is connected to a speed setpoint generator 30.
  • a speed controller is integrated in the frequency converter 21, which regulates the speed in accordance with the speed setpoint, so that the pump is driven at the required speed.
  • a controller is, for example, a PID controller.

Landscapes

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

Abstract

L'invention concerne un dispositif de réglage d'une pompe à membrane destiné à l'alimentation du filtre-presse ou à des consommateurs équivalents. Ce dispositif comprend un moteur triphasé électrique qui est destiné à l'entraînement de la pompe et qui est relié au réseau d'alimentation par un convertisseur de fréquence de fréquence variable, lequel présente une sortie analogique où apparaît un signal réel correspondant au couple moteur respectif. Ce dispositif comprend également un capteur de consigne de vitesse de rotation à l'entrée duquel un signal réel est appliqué via un inverseur et dans lequel une courbe établissant une relation entre le couple moteur et le régime est mémorisée, de telle façon que pour de faibles valeurs réelles, la courbe de vitesse de rotation suit une valeur constante maximale et, après avoir atteint une valeur prédéterminée du signal réel, elle chute progressivement à une valeur minimale. Ce dispositif comprend enfin un étage d'amortissement pour le signal réel.
EP99950623A 1998-12-09 1999-10-05 Dispositif de reglage d'une pompe a membrane Expired - Lifetime EP1055071B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29821910U 1998-12-09
DE29821910U DE29821910U1 (de) 1998-12-09 1998-12-09 Regelvorrichtung für eine Membranpumpe
PCT/EP1999/007399 WO2000034659A1 (fr) 1998-12-09 1999-10-05 Dispositif de reglage d'une pompe a membrane

Publications (2)

Publication Number Publication Date
EP1055071A1 true EP1055071A1 (fr) 2000-11-29
EP1055071B1 EP1055071B1 (fr) 2004-09-15

Family

ID=8066385

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99950623A Expired - Lifetime EP1055071B1 (fr) 1998-12-09 1999-10-05 Dispositif de reglage d'une pompe a membrane

Country Status (6)

Country Link
US (1) US6344722B1 (fr)
EP (1) EP1055071B1 (fr)
JP (1) JP2002531774A (fr)
DE (2) DE29821910U1 (fr)
ES (1) ES2226450T3 (fr)
WO (1) WO2000034659A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7273904B2 (en) * 2002-10-03 2007-09-25 The Board Of Trustees Of The University Of Arkansas Nanocrystals in ligand boxes exhibiting enhanced chemical, photochemical, and thermal stability, and methods of making the same
US8017409B2 (en) 2009-05-29 2011-09-13 Ecolab Usa Inc. Microflow analytical system
DE102010003218A1 (de) * 2010-03-24 2011-09-29 Prominent Dosiertechnik Gmbh Verfahren zum Steuern und/oder Regeln einer Dosierpumpe
GB2549045B (en) * 2015-02-27 2021-01-20 Halliburton Energy Services Inc Ultrasound color flow imaging for oil field applications
US10351488B2 (en) 2016-08-02 2019-07-16 Exxonmobil Chemical Patents Inc. Unsaturated polyalpha-olefin materials
US11767840B2 (en) 2021-01-25 2023-09-26 Ingersoll-Rand Industrial U.S. Diaphragm pump

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4063140A (en) * 1976-02-05 1977-12-13 Rockwell International Corporation Method and apparatus for limiting position servo authority
GB2101355B (en) * 1981-04-30 1985-01-16 Rotork Controls Control of valve actuator
JPH0210796U (fr) * 1988-06-28 1990-01-23
US4971522A (en) 1989-05-11 1990-11-20 Butlin Duncan M Control system and method for AC motor driven cyclic load
DE4032876A1 (de) 1990-10-17 1992-04-23 Teves Gmbh Alfred Elektromotorisch angetriebene hydraulische pumpe
US5155422A (en) * 1991-03-28 1992-10-13 Digital Equipment Corporation Self-tuning adaptive bandwidth regulator
WO1995009305A1 (fr) 1993-09-27 1995-04-06 Diversey Corporation Systeme de pompage a debit mesure dote d'un systeme de compensation de charge et procede prevu a cet effet
DE4335403C1 (de) * 1993-10-18 1994-12-15 Karl Hehl Hydraulikeinrichtung
US5668457A (en) * 1995-06-30 1997-09-16 Martin Marietta Corporation Variable-frequency AC induction motor controller
US5883489A (en) * 1996-09-27 1999-03-16 General Electric Company High speed deep well pump for residential use
JP3997318B2 (ja) * 1998-02-16 2007-10-24 株式会社サタコ ポンプの制御方法及び制御装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0034659A1 *

Also Published As

Publication number Publication date
WO2000034659A1 (fr) 2000-06-15
JP2002531774A (ja) 2002-09-24
EP1055071B1 (fr) 2004-09-15
US6344722B1 (en) 2002-02-05
DE29821910U1 (de) 1999-02-04
ES2226450T3 (es) 2005-03-16
DE59910519D1 (de) 2004-10-21

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