EP3899276A1 - Verfahren zur positionserfassung der membran einer elektromotorisch angetriebenen membranpumpe - Google Patents
Verfahren zur positionserfassung der membran einer elektromotorisch angetriebenen membranpumpeInfo
- Publication number
- EP3899276A1 EP3899276A1 EP20725636.3A EP20725636A EP3899276A1 EP 3899276 A1 EP3899276 A1 EP 3899276A1 EP 20725636 A EP20725636 A EP 20725636A EP 3899276 A1 EP3899276 A1 EP 3899276A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- diaphragm
- membrane
- detection device
- electric motor
- movement
- 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- Withdrawn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 13
- 238000001514 detection method Methods 0.000 claims abstract description 29
- 238000011156 evaluation Methods 0.000 claims abstract description 8
- 239000012528 membrane Substances 0.000 claims description 23
- 238000005259 measurement Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 description 4
- 238000011109 contamination Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory 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
- 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
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/01—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being mechanical
-
- 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
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
-
- 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
- F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
- F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
- F04B45/047—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
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
-
- 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
- F04B2201/1202—Torque on the axis
-
- 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
- F04B2203/0201—Current
-
- 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
Definitions
- the present invention relates to a method for determining the position of the diaphragm or the drive piston of an electric motor-driven diaphragm pump, in particular the detection of the upper and lower reversal point in the movement sequence of the diaphragm of such a pump
- Diaphragm pumps for pumping 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, which 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 contamination.
- a diaphragm pump is low-wear and insensitive to continuous stress, which makes such machines well-suited for conveying tasks with long operating and idle times, such as those that occur in the industrial or motor vehicle environment.
- a conventional diaphragm pump has a pumping chamber that is closed by a diaphragm and secured on the inlet and outlet side by valves. This is changed in volume when the membrane is operated by pushing or pulling, whereby a suction or compression process and therefore a delivery of a fluid takes place in accordance with the valve design.
- the membrane is deflected either hydraulically, pneumatically, mechanically or electromagnetically.
- the present invention is concerned with an electric motor is 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, based on the movement of the tappet or connecting rod along the eccentric drive, a high torque flow tuation along a direction of rotation of the eccentric. From the publication DE 102016125578 A an electric motor via eccentric means be driven diaphragm pump is known which uses a special drive concept of a pendulum eccentric drive.
- the task is to know the mechanical position of the diaphragm and therefore of the drive piston on the eccentric in order to be able to realize efficient pump operation via the electric motor drive. Furthermore, it is 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. In addition, the position detection of the membrane layer and in particular also the time of the respective upper and lower dead centers of the membrane are required for basic pump control.
- a position detection device for determining the position of the diaphragm or the drive piston of an electromotive driven diaphragm pump is provided, in particular the detection of the upper and lower reversal point in the movement sequence of the diaphragm of an electric motor operated via eccentric means
- Diaphragm pump in which a diaphragm actuated by a drive connecting rod closes a delivery space provided with valve means on the inlet and outlet sides between a minimum and maximum volume in a variable volume by converting a rotary movement of an electric motor having a rotor into an actuation movement of the drive connecting rod through the action of the eccentric means, whereby the position detection device has detection means for detecting the load profile of the diaphragm pump during the movement of the membrane, as well as an evaluation device to determine from the load profile at least the position of the upper and lower reversal point of the membrane.
- the detection means are designed to detect in particular the torque curve of the diaphragm pump during a complete up and down movement of the diaphragm, more preferably during the entire movement of the diaphragm pump, so that a continuous Position detection of the membrane is guaranteed at its reversal points.
- measuring means are provided to detect the position of the rotor of the electric motor, the rotor position being advantageously detected by means of several position sensors and more preferably by means of an angle clock for detecting the current angle of rotation.
- the position detection device has an evaluation device which is designed to cumulatively determine the position of the rotor from at least the load profile and the relative torque maxima and / or torque minima contained therein and the position of the rotor detected parallel thereto Memb ran, in particular to determine the upper and lower reversal point of the membrane.
- Another aspect of the present invention relates to a diaphragm pump designed with a position detection device as described above.
- Another inventive aspect of the present invention relates to a method for determining the position of the diaphragm or the drive piston of an electric motor-driven diaphragm pump, in particular the
- Diaphragm pump in which a diaphragm actuated by a drive connecting rod closes off a delivery space provided on the inlet and outlet side with valve means between a minimum and maximum volume in a variable volume by converting a rotary movement of an electric motor having a rotor into an actuating movement of the drive connecting rod through the action of the eccentric means, wherein the position is determined at least from the detection of the load profile and the relative torque maxima and / or torque minima contained therein.
- the method is carried out with a position detection device as described above. It is also advantageous if the position of the membrane, preferably the upper and lower reversal point of the membrane, are determined cumulatively from the data record of the load profile together with the position of the rotor by means of an evaluation device.
- the load profile is determined indirectly from a base current measurement of the motor, the measurement of the total current being measured at the base or feed point of a converter bridge of the converter.
- Fig. 1 is a flow chart showing the steps for determining the
- FIG. 1 there is a flow chart with two processes running in parallel. During the entire process of determining the extreme points, the speed of the motor that drives the diaphragm pump is regulated. The right part of the flow diagram shows how the recording of the upper and lower turning point (extreme points) is carried out. Since the position of the reversal points of the membrane is determined from the rotor position with position sensors and an angle clock and the motor current (load curve), the limit value of the corresponding motor current is also required, which therefore changes cyclically per revolution up to a maximum value.
- the stored values for the angle sum and a value counter are first set to zero and a new mechanical revolution can begin or a check is made to see whether a new mechanical revolution has started. If this is the case, the evaluation device checks whether the current currently detected is greater than the limit value. If this is the case, the angle sum is determined by adding the currently determined angle to the stored value of the angle sum and the value counter increments by 1.
- the limit value against which the comparison is made is preferably the heavily filtered motor current. The motor current is then compared against this limit value and as soon as the motor current is less than or equal to the limit value, the extreme point is reached.
- the angle clock is a memory that is increased at every time interval (e.g. 100ps) by the amount that the rotor has traveled due to its current speed.
- angle pieces are always added up here, these angle pieces are in the unit "degrees”.
- the process is carried out until the iterative query detects that the mechanical rotation has ended. Then the extreme point can be determined from the angle sum and the value counter.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019117729.4A DE102019117729A1 (de) | 2019-07-01 | 2019-07-01 | Verfahren zur Positionserfassung der Membran einer elektromotorisch angetriebenen Membranpumpe |
| PCT/EP2020/061870 WO2021001083A1 (de) | 2019-07-01 | 2020-04-29 | Verfahren zur positionserfassung der membran einer elektromotorisch angetriebenen membranpumpe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3899276A1 true EP3899276A1 (de) | 2021-10-27 |
Family
ID=70682816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20725636.3A Withdrawn EP3899276A1 (de) | 2019-07-01 | 2020-04-29 | Verfahren zur positionserfassung der membran einer elektromotorisch angetriebenen membranpumpe |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20220205442A1 (de) |
| EP (1) | EP3899276A1 (de) |
| KR (1) | KR20210127165A (de) |
| CN (1) | CN113474557B (de) |
| DE (1) | DE102019117729A1 (de) |
| WO (1) | WO2021001083A1 (de) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010003218A1 (de) * | 2010-03-24 | 2011-09-29 | Prominent Dosiertechnik Gmbh | Verfahren zum Steuern und/oder Regeln einer Dosierpumpe |
| US20190154019A1 (en) * | 2016-05-17 | 2019-05-23 | Dürr Systems Ag | Coating agent pump |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10023523C1 (de) * | 2000-05-13 | 2001-12-13 | Vacuubrand Gmbh & Co Kg | Anlaufsteuerung für eine Membran- und/oder Kolbenvakuumpumpe |
| CN101245770B (zh) * | 2007-02-17 | 2012-05-30 | 卓越剂量技术有限公司 | 电动机驱动计量泵 |
| CN202203088U (zh) * | 2011-08-12 | 2012-04-25 | 启东神农机械有限公司 | 蒸发器进料泵 |
| CN102635537A (zh) * | 2012-05-04 | 2012-08-15 | 项炳荣 | 一种隔膜泵的驱动装置及方法 |
| DE102013113351A1 (de) * | 2013-12-03 | 2015-06-03 | Pfeiffer Vacuum Gmbh | Verfahren zur Kalibrierung einer Membranvakuumpumpe sowie Membranvakuumpumpe |
| 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 |
| DK179576B1 (en) * | 2017-07-13 | 2019-02-20 | Nel Hydrogen A/S | A method of controlling the hydraulic fluid pressure of a diaphragm compressor |
| EP4108916A1 (de) * | 2021-06-25 | 2022-12-28 | Grundfos Holding A/S | Überwachungsverfahren zur überwachung des betriebs einer dosierpumpe und dosierpumpensystem |
-
2019
- 2019-07-01 DE DE102019117729.4A patent/DE102019117729A1/de not_active Withdrawn
-
2020
- 2020-04-29 KR KR1020217025630A patent/KR20210127165A/ko not_active Ceased
- 2020-04-29 CN CN202080016229.8A patent/CN113474557B/zh not_active Expired - Fee Related
- 2020-04-29 WO PCT/EP2020/061870 patent/WO2021001083A1/de not_active Ceased
- 2020-04-29 EP EP20725636.3A patent/EP3899276A1/de not_active Withdrawn
- 2020-04-29 US US17/606,034 patent/US20220205442A1/en not_active Abandoned
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010003218A1 (de) * | 2010-03-24 | 2011-09-29 | Prominent Dosiertechnik Gmbh | Verfahren zum Steuern und/oder Regeln einer Dosierpumpe |
| US20190154019A1 (en) * | 2016-05-17 | 2019-05-23 | Dürr Systems Ag | Coating agent pump |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2021001083A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113474557B (zh) | 2023-06-02 |
| WO2021001083A1 (de) | 2021-01-07 |
| KR20210127165A (ko) | 2021-10-21 |
| DE102019117729A1 (de) | 2021-01-07 |
| US20220205442A1 (en) | 2022-06-30 |
| CN113474557A (zh) | 2021-10-01 |
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