EP3894705A1 - Verfahren zur positionserfassung der membran einer elektromotorisch angetriebenen membranpumpe - Google Patents
Verfahren zur positionserfassung der membran einer elektromotorisch angetriebenen membranpumpeInfo
- Publication number
- EP3894705A1 EP3894705A1 EP20727203.0A EP20727203A EP3894705A1 EP 3894705 A1 EP3894705 A1 EP 3894705A1 EP 20727203 A EP20727203 A EP 20727203A EP 3894705 A1 EP3894705 A1 EP 3894705A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- diaphragm
- movement
- membrane
- detection device
- electric motor
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims description 12
- 230000033001 locomotion Effects 0.000 claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 239000012528 membrane Substances 0.000 claims description 24
- 238000005086 pumping Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000011156 evaluation Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000007906 compression Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
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
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/0009—Special features
- F04B43/0081—Special features systems, control, safety measures
-
- 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
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/04—Pumps having electric drive
-
- 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
- F04B49/22—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 means of valves
-
- 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
- F04B7/00—Piston machines or pumps characterised by having positively-driven valving
-
- 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
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
- F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
- F04B9/045—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being eccentrics
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
-
- 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
- F04B2201/00—Pump parameters
- F04B2201/02—Piston parameters
- F04B2201/0201—Position of the piston
-
- 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
- F04B2201/00—Pump parameters
- F04B2201/12—Parameters of driving or driven means
- F04B2201/1208—Angular position of the shaft
-
- 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
Definitions
- the present invention relates to a method for determining the position of the membrane or the drive piston of an electric motor driven membrane pump which is driven in pendulum mode, in particular the detection of the upper and lower reversal point in the movement of the membrane of such
- Diaphragm pumps for conveying liquids or gases are generally known from the prior art.
- Various designs of diaphragm pumps are available in the prior art. All diaphragm pump designs basically concern a machine for conveying liquids or gases that is particularly insensitive to long-term stress and contamination in the conveyed material.
- the functional principle of a diaphragm pump is a modification of the known piston pump, but the medium to be conveyed is separated from the drive by a diaphragm.
- the advantage of this pump is that the separating diaphragm shields the drive from harmful influences from the pumped medium, such as sludge or impurities. This requires, in particular, the low wear and tear and the insensitivity of a diaphragm pump under constant load, which makes such machines well suited for conveying tasks with long operating and idle times, such as occur in the industrial or motor vehicle environment.
- a conventional diaphragm pump has a pumping chamber which is closed by a diaphragm and secured by valves on the inlet and outlet sides. This is changed in volume when the membrane is pressed or pulled, whereby a suction or compression process and therefore a delivery of a fluid takes place accordingly to the valve design.
- the diaphragm is deflected either hydraulically, pneumatically, mechanically or electromagnetically.
- the present invention is concerned with an electric motor driven d. H. mechanically driven by an electric motor diaphragm pump.
- Such electric motor driven diaphragm pumps are in most cases via a connecting rod d. H. a drive piston and an eccentric driven by an electric motor.
- Diaphragm pumps of the generic type have a high torque fluctuation along one direction of rotation of the eccentric relative to the movement of the tappet or connecting rod along the eccentric drive.
- a diaphragm pump operated by an electric motor via eccentric means which uses a special drive concept of a pendulum eccentric drive.
- the electric motor driving the eccentric means is controlled in a periodic pendulum movement, which extends over a certain Drehwinkelbe rich, which is smaller than a complete revolution of the eccentric means.
- this angle of rotation range which thus avoids a complete rotation and thus in particular also avoids a high or unfavorable operating position with regard to the required torque, is smaller than 200 °, and can possibly also be designed to be even smaller in the range.
- valve position It is therefore necessary for the valve position to detect the reversal points of the membrane from the suction phase with an increasing delivery volume to the pressure phase with a decreasing delivery volume, since valve actuation too early or too late results in inefficient operation.
- position detection of the diaphragm layer and in particular the time of the respective upper and lower dead centers of the diaphragm are required for basic pump control.
- a position detection device for determining the position of the membrane or the drive piston of an electric motor driven diaphragm pump is provided, in particular the detection of the upper and lower reversal point in the movement of the membrane of a membrane pump operated by an electric motor via eccentric means in pendulum mode, in which a diaphragm operated by a drive connecting rod has a On the inlet and outlet side provided with valve means conveying space between a minimum and maximum volume closes variable volume by the effect of the eccentric means a pendulum movement of an electric motor having a rotor is converted into an actuation movement of the drive connecting rod, the position detection device having detection means for detecting the mean position of the rotor shaft and an evaluation device to determine at least the position of the upper reversal point of the membrane from the mean position.
- the pendulum movement is preferably only controlled via the pendulum motor shaft after the motor shaft first executes a rotary movement after the motor has started and is then converted into the pendulum movement.
- the upper and lower reversal point in the context of the present invention are those positions of the membrane at which the respective direction of movement of the membrane changes in the opposite direction when it moves up and down, thus the delivery volume changes alternately these points are reduced or enlarged again.
- the detection means are designed to detect in particular the mean value position of the motor shaft during a complete up and down movement of the membrane as soon as the motor shaft has been converted from a rotary movement into a pendulum movement.
- measuring means are provided in order to detect the position of the rotor of the electric motor, with the rotor position being advantageously detected by means of an angle clock.
- Another aspect of the present invention relates to a diaphragm pump designed with a position detection device as described above.
- It is preferably a diaphragm pump with a motor control device which is designed to set the rotor shaft in a pendulum motion in a certain angular range between 150 ° and 200 ° and a valve Control device for controlling valves depending on the position of the membrane determined by the position detection device.
- a likewise inventive aspect of the present invention relates to a method for determining the position of the diaphragm or the drive piston of an electromotive driven diaphragm pump in pendulum operation, in particular the detection of the upper and lower reversal point in the movement sequence of the diaphragm of an electromotive diaphragm pump operated by eccentric means, in which one is driven by a drive connecting rod
- the actuated membrane closes off a pumping chamber provided with valve means on the inlet and outlet side between a minimum and maximum volume in a variable-volume manner, in that the action of the eccentric means converts an oscillating movement of an electric motor with a rotor into an actuating movement of the drive connecting rod, the process step being provided that the position of the membrane is determined at least from the acquisition of the mean value position of the motor shaft by means of an angle clock.
- the method is carried out with a position detection device as described above.
- Fig. 1 shows a diagram which shows an example of the position of the shaft plotted over time and.
- Fig. 2 is a flow chart showing the steps for determining the extreme points of the invention.
- FIGS. 1 and 2 there is an exemplary diagram, which represents the angular position of the shaft, beginning with the engine start in the speed mode, transitioning to the pendulum mode, whereby first an alignment takes place and then an aligned stable pendulum mode is also shown the mean value from which the upper reversal point of the membrane can be derived. The lower reversal point then results cyclically in the middle between two successive upper reversal points
- FIG. 2 shows a flow chart with two processes running in parallel.
- One process concerns the rotor position detection with an angle clock.
- the motor is controlled in such a way that it first rotates clockwise (CW), then again counterclockwise (CCW), the process is repeated until there is a difference for the position in the clockwise direction (pos_cw) and for the position in the counterclockwise direction (pos_ccw) is smaller than a specified target value (X) in order to determine that a stable position has been reached. From this, the position for the upper extreme point (OT) of the membrane is now determined.
- CW clockwise
- CCW counterclockwise
- X specified target value
- the extreme point is determined by taking the mean value between the two reversal points. You basically take the max value and the min value from the rotor position and form the mean value from them.
- the invention is not limited in its implementation to the preferred exemplary embodiments indicated above. Rather, a number of variants are conceivable which make use of the solution shown even in the case of fundamentally different designs.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019117731.6A DE102019117731A1 (de) | 2019-07-01 | 2019-07-01 | Verfahren zur Positionserfassung der Membran einer elektromotorisch angetriebenen Membranpumpe |
| PCT/EP2020/063652 WO2021001087A1 (de) | 2019-07-01 | 2020-05-15 | Verfahren zur positionserfassung der membran einer elektromotorisch angetriebenen membranpumpe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3894705A1 true EP3894705A1 (de) | 2021-10-20 |
Family
ID=70779715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20727203.0A Withdrawn EP3894705A1 (de) | 2019-07-01 | 2020-05-15 | Verfahren zur positionserfassung der membran einer elektromotorisch angetriebenen membranpumpe |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20220186722A1 (de) |
| EP (1) | EP3894705A1 (de) |
| KR (1) | KR20220017882A (de) |
| CN (1) | CN113518861A (de) |
| DE (1) | DE102019117731A1 (de) |
| WO (1) | WO2021001087A1 (de) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19826610A1 (de) * | 1998-06-16 | 1999-12-23 | Bran & Luebbe | Membranpumpe und Vorrichtung zur Steuerung derselben |
| JP4378937B2 (ja) * | 2002-06-03 | 2009-12-09 | セイコーエプソン株式会社 | ポンプ |
| JP5339915B2 (ja) * | 2005-11-21 | 2013-11-13 | インテグリス・インコーポレーテッド | ポンプの機械式ピストンのピストン制御システムおよび方法 |
| SE532405C2 (sv) * | 2008-05-02 | 2010-01-12 | Johan Stenberg | Pumpsystem samt förfarande för att fastställa ett tryckvärde |
| DE102013113351A1 (de) * | 2013-12-03 | 2015-06-03 | Pfeiffer Vacuum Gmbh | Verfahren zur Kalibrierung einer Membranvakuumpumpe sowie Membranvakuumpumpe |
| DE102014112266A1 (de) * | 2014-08-27 | 2016-03-03 | Adcos Gmbh | Verfahren zum Kalibrieren einer dreiphasigen Permanentmagnet-Synchronmaschine |
| DE102016109318A1 (de) * | 2016-05-20 | 2017-11-23 | Max Wild Gmbh | Kolbenpumpe |
| DE102016125578A1 (de) | 2016-12-23 | 2018-06-28 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Elektromotorisch betriebene Membranpumpe, Verwendung einer solchen und Verfahren zum Betreiben einer Membranpumpe |
| DE102017112975B3 (de) * | 2017-06-13 | 2018-10-25 | KNF Micro AG | Membranpumpe |
-
2019
- 2019-07-01 DE DE102019117731.6A patent/DE102019117731A1/de not_active Withdrawn
-
2020
- 2020-05-15 KR KR1020217028313A patent/KR20220017882A/ko not_active Ceased
- 2020-05-15 CN CN202080018593.8A patent/CN113518861A/zh active Pending
- 2020-05-15 WO PCT/EP2020/063652 patent/WO2021001087A1/de not_active Ceased
- 2020-05-15 US US17/601,373 patent/US20220186722A1/en not_active Abandoned
- 2020-05-15 EP EP20727203.0A patent/EP3894705A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| US20220186722A1 (en) | 2022-06-16 |
| WO2021001087A1 (de) | 2021-01-07 |
| CN113518861A (zh) | 2021-10-19 |
| DE102019117731A1 (de) | 2021-01-07 |
| KR20220017882A (ko) | 2022-02-14 |
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Legal Events
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