EP1055071B1 - Regelvorrichtung für eine membranpumpe - Google Patents
Regelvorrichtung für eine membranpumpe Download PDFInfo
- Publication number
- EP1055071B1 EP1055071B1 EP99950623A EP99950623A EP1055071B1 EP 1055071 B1 EP1055071 B1 EP 1055071B1 EP 99950623 A EP99950623 A EP 99950623A EP 99950623 A EP99950623 A EP 99950623A EP 1055071 B1 EP1055071 B1 EP 1055071B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- frequency converter
- actual
- speed
- pump
- 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
Links
Images
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 either mechanical or operated hydraulically. They are used, for example, to feed filter presses or similar consumers, such as B. Spray tower loads and the same.
- the drive motor for example a three-phase motor, to operate via a frequency converter and the adaptation of the Flow rate and pump pressure depending on the measured Pressure.
- the line between the pump and filter press assigned a pressure transmitter, its output signal is given to a programmable logic controller.
- a programmable logic controller assigns the corresponding control signal for the Frequency converter for adapting the speed of the drive motor to the Pressure ratios by changing the output frequency of the converter.
- Programmable logic controllers such as those used for such speed controls are required are relatively expensive.
- the invention has for its object a control device for a To create diaphragm pump, which with a minimal apparatus Effort works.
- An electric drive motor in particular a three-phase asynchronous motor, drives the diaphragm pump.
- the drive motor is over one in its Frequency variable frequency converter supplied, which in turn with 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 is also provided, which is not specifies a constant speed value, but a setpoint curve, which in Speed setpoint generator is saved.
- the curve consists of a constant branch that corresponds to a maximum speed. Since the Output of the frequency converter via an inverter to the input of the Is given a small signal (engine torque) at the output to a large signal (engine speed) at the input of the speed setpoint generator. In other words, with relatively small ones
- the speed setpoint generator gives a maximum speed value in front. This may well be higher than, for example, one like it is reached at 50 or 60 Hertz. A speed value can even be specified which corresponds, for example, to a frequency of 130 Hz.
- the descending curve is followed to a minimum speed, the is then kept constant, for example at a value at which the Electric motor just runs smoothly. For example, this corresponds to one Speed of 2.0 rpm.
- the device according to the invention also contains an attenuator. This ensures that those that inevitably occur with a diaphragm pump periodic fluctuations of the actual signal are damped so far that a processable signal is obtained.
- the device according to the invention has the advantage that it is a conventional one Frequency converter can be used only minimally by appropriate Circuit parts must be supplemented. External control and regulating devices are not required. In particular, a pressure sensor completely cease to exist for regulatory purposes. In practice it has pointed out that it is easily possible with the invention, proportional to the sludge pressure building up in the filter press React torque of the engine.
- a diaphragm pump 18 is shown by a three-phase motor 16 is driven.
- the three-phase motor 16 is via a frequency converter 21 connected to the mains.
- the frequency of the Motors can be changed between 2 Hz and 130 Hz.
- the one in an inverter 20 determined motor currents are determined and appear an analog output 22 as actual signals for the torque of the motor 16.
- the signal is a current signal that ranges between 0 and 21 mA. Current 0 means infinitely small torque and maximum current means maximum torque.
- the signal Since the pump generates a swelling pressure, the signal is at the output 22 swelling accordingly.
- An attenuator 23 ensures a corresponding Uniformity of the actual signal.
- the attenuation of the actual signal is preferably done with a filter time constant, for example 8 Seconds. At the same time, this constant can be used to adapt to the respective pump size can be reached.
- the actual signal is sent from output 22 via line 24 to the input given an inverter 28, which in turn with a speed setpoint 30 is connected.
- a frequency converter 21 Speed controller is integrated, the speed according to the speed setpoint regulates so that the pump is driven at the required speed becomes.
- 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)
- Fluid-Driven Valves (AREA)
Abstract
Description
- Fig. 1
- zeigt schematisch ein Blockschaltbild nach der Erfindung.
- Fig. 2
- zeigt ein Diagramm über den Druck- und Drehzahlverlauf bei einer Filterpressenbeschickung mit einer Vorrichtung nach Fig. 1.
Claims (5)
- Regelvorrichtung für eine Membranpumpe zur Filterpressenbeschickung oder ähnlicher Verbraucher, miteinem Frequenzumrichter;einem elektrischen Drehstromantriebsmotor (16) für die Pumpe (18), der über dem in seiner Frequenz veränderlichen Frequenzumrichter (20) mit dem Versorgungsnetz verbunden ist, wobei der Frequenzumrichter einen analogen Ausgang (22) aufweist, an dem ein dem jeweiligen Motormoment entsprechendes Ist-Signal erscheint,einem Drehzahlsollwertgeber (30), auf dessen Eingang das Ist-Signal über einen Inverter (28) gegeben wird und in dem eine eine Abhängigkeit zwischen dem Motormoment und der Drehzahl herstellende Soll-Kurve gespeichert ist derart, daß bei Ist-Signalwerten unterhalb eines Grenzwerts die Drehzahl einen konstanten maximalen Wert (nmax) aufweist und bei Erreichen des Grenzwertes mit größer werdenden Ist-Signalwerten allmählich auf eine Mindestdrehzahl (nmin) abfällt, undeiner Dämpfungsstufe (23) für das Ist-Signal.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der abfallende Kurvenabschnitt (10) eine Gerade ist.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß im Drehzahlsollwertgeber (30) ein unterer Drehzahlwert (nmin) gespeichert ist und das Motormoment konstant bleibt, wenn der untere Drehzahlwert (nmin) erreicht.
- Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der obere Drehzahlwert (nmax) einer Ausgangsfrequenz des Frequenzumrichters (20) entspricht, die oberhalb der Netzfrequenz liegt.
- Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Kurve (9, 10) programmierbar ist und an den jeweiligen Verbraucher für die Pumpe angepaßt werden kann.
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 (de) | 1998-12-09 | 1999-10-05 | Regelvorrichtung für eine membranpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1055071A1 EP1055071A1 (de) | 2000-11-29 |
EP1055071B1 true EP1055071B1 (de) | 2004-09-15 |
Family
ID=8066385
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99950623A Expired - Lifetime EP1055071B1 (de) | 1998-12-09 | 1999-10-05 | Regelvorrichtung für eine membranpumpe |
Country Status (6)
Country | Link |
---|---|
US (1) | US6344722B1 (de) |
EP (1) | EP1055071B1 (de) |
JP (1) | JP2002531774A (de) |
DE (2) | DE29821910U1 (de) |
ES (1) | ES2226450T3 (de) |
WO (1) | WO2000034659A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2003279807A1 (en) * | 2002-10-03 | 2004-04-23 | 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 |
BR112017016107A2 (pt) * | 2015-02-27 | 2018-03-27 | Halliburton Energy Services Inc | sistema para medições de reologia, e, método para operação de um sistema para medição de reologia |
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)
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 (de) * | 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 |
AU698430B2 (en) | 1993-09-27 | 1998-10-29 | Diversey Ip International Bv | Flow-metered pumping with load compensation system and method |
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 |
-
1998
- 1998-12-09 DE DE29821910U patent/DE29821910U1/de not_active Expired - Lifetime
-
1999
- 1999-10-05 JP JP2000587082A patent/JP2002531774A/ja active Pending
- 1999-10-05 US US09/601,821 patent/US6344722B1/en not_active Expired - Lifetime
- 1999-10-05 DE DE59910519T patent/DE59910519D1/de not_active Expired - Lifetime
- 1999-10-05 ES ES99950623T patent/ES2226450T3/es not_active Expired - Lifetime
- 1999-10-05 WO PCT/EP1999/007399 patent/WO2000034659A1/de active IP Right Grant
- 1999-10-05 EP EP99950623A patent/EP1055071B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE29821910U1 (de) | 1999-02-04 |
DE59910519D1 (de) | 2004-10-21 |
JP2002531774A (ja) | 2002-09-24 |
WO2000034659A1 (de) | 2000-06-15 |
ES2226450T3 (es) | 2005-03-16 |
EP1055071A1 (de) | 2000-11-29 |
US6344722B1 (en) | 2002-02-05 |
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