EP0379718A2 - Device and method for moving fluid mediums - Google Patents

Device and method for moving fluid mediums Download PDF

Info

Publication number
EP0379718A2
EP0379718A2 EP89123724A EP89123724A EP0379718A2 EP 0379718 A2 EP0379718 A2 EP 0379718A2 EP 89123724 A EP89123724 A EP 89123724A EP 89123724 A EP89123724 A EP 89123724A EP 0379718 A2 EP0379718 A2 EP 0379718A2
Authority
EP
European Patent Office
Prior art keywords
pump
pulsation
line
delivery line
valve
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Withdrawn
Application number
EP89123724A
Other languages
German (de)
French (fr)
Other versions
EP0379718A3 (en
Inventor
Joachim Dipl.-Ing. Wegener
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.)
Allweiler GmbH
Original Assignee
Allweiler AG
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 Allweiler AG filed Critical Allweiler AG
Publication of EP0379718A2 publication Critical patent/EP0379718A2/en
Publication of EP0379718A3 publication Critical patent/EP0379718A3/en
Withdrawn legal-status Critical Current

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
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/008—Reduction of noise or vibration

Definitions

  • the invention relates to a device and a method for moving flow media, in particular liquids, in a delivery line by means of a pump.
  • the inventor has set himself the goal of reducing the pressure differences in the pump pulsation.
  • Active damping of the pressure pulsation is achieved by generating a counter-pressure pulsation of the same size, but offset by 180 ° C; the resulting pulsation is kept as small as possible.
  • the pressure peaks of the pressure pulsation are cut off by a piezo-controlled valve.
  • Flow medium is brought from a container 10 to a consumer 16 by a pump 12 through a delivery line 14.
  • the pump 12 is followed by a branch line 18 of the delivery line 14, which leads to a piezo back pressure generator 20 in FIG. 1. This is followed via electrical lines 22, 23, a controller 24 to which a transducer 26 with an electrical output signal connects. After the latter, the line 18 a leads back to the delivery line 14.
  • FIG. 2 shows the pressure difference .DELTA.p over time t in pump pulsation A and back pressure pulsation B of the piezo back pressure generator 20.
  • the resulting pulsation is designated by C.
  • 1, 2 illustrate the active damping of the pressure pulsation A by generating a counter-pressure pulsation B of the same size but offset by 180 °, so that the resulting pulsation C is kept as small as possible.
  • the back pressure pulsation B is generated with the aid of the piezo-controlled element 20.
  • the branch line 18 leads to a valve 21 which is controlled by a piezo element and which is connected to a reservoir 11.
  • the pump pulsation a is reduced by cutting off pressure peaks through that piezo-controlled valve 21.
  • the area y is that without the use of the valve 21, which produces the described effect in the area Z.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)

Abstract

A device for moving flowing media, in particular liquids, in a delivery line by means of a pump is intended to permit a reduction in the pressure differentials in the case of pump pulsation. For this purpose a piezo counter-pressure generator (20) or a valve (21) controlled by a piezo element is arranged in a branch line (18) of the delivery line (14). The valve may be connected to a fluid reservoir (11) or to the intake line (12). <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung und ein Verfahren zum Bewegen von Strömmungsmedien, insbesondere von Flüssigkeiten, in einer Förder­leitung mittels einer Pumpe.The invention relates to a device and a method for moving flow media, in particular liquids, in a delivery line by means of a pump.

Der Erfinder hat sich zum Ziel gesetzt, eine Verminderung der Druckunterschiede bei der Pumpenpulsation zu erreichen.The inventor has set himself the goal of reducing the pressure differences in the pump pulsation.

Zur Lösung dieser Aufgabe führt die Anwendung des an sich bekannten Piezo-Effektes entsprechend den alternativen Maßgaben der Ansprüche 1 und 2 bzw. 8 und 9.To achieve this object, the application of the known piezo effect leads to the alternative requirements of claims 1 and 2 or 8 and 9.

Eine aktive Dämpfung der Druckpulsation wird durch die Erzeugung einer gleichgroßen, aber um 180°C versetzten Gegendruckpulsation erreicht; die resultierende Pulsation wird möglichst klein gehalten.Active damping of the pressure pulsation is achieved by generating a counter-pressure pulsation of the same size, but offset by 180 ° C; the resulting pulsation is kept as small as possible.

Nach einem anderen Lösungsweg werden die Druckspitzen der Druckpulsation durch ein Piezo-gesteuertes Ventil abgeschnitten.In another solution, the pressure peaks of the pressure pulsation are cut off by a piezo-controlled valve.

Weitere Vorteile, Merkmale un Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnung; diese zeigt in

  • Fig. 1, 3 jeweils schematisiert erfindungsgemäße Anordnungen;
  • Fig. 2, 4: Diagramme dazu bezüglich der jeweils erreichten Pulsation.
Further advantages, features and details of the invention result from the following description of preferred exemplary embodiments and from the drawing; this shows in
  • 1, 3 each schematically arrangements according to the invention;
  • 2, 4: Diagrams relating to the pulsation achieved in each case.

Aus einem Behälter 10 wird mittels einer Pumpe 12 durch eine Förderleitung 14 Strömungsmedium zu einem Verbraucher 16 gebracht.Flow medium is brought from a container 10 to a consumer 16 by a pump 12 through a delivery line 14.

Der Pumpe 12 ist eine Zweigleitung 18 der Förderleitung 14 nachgeordnet, die in Fig. 1 zu einem Piezo-Gegendruckerzeuger 20 führt. Diesem ist über elektrische Leitungen 22, 23 ein Regler 24 nachgeschaltet, an den ein Meßwertaufnehmer 26 mit elektrischem Ausgangssignal anschließt. Nach letzterem führt die Leitung 18a zur Förderleitung 14 zurück.The pump 12 is followed by a branch line 18 of the delivery line 14, which leads to a piezo back pressure generator 20 in FIG. 1. This is followed via electrical lines 22, 23, a controller 24 to which a transducer 26 with an electrical output signal connects. After the latter, the line 18 a leads back to the delivery line 14.

Das Diagramm der Fig. 2 zeigt die Druckdifferenz Δ p über der Zeit t bei der Pumpenpulsation A und der Gegendruckpulsation B des Piezo-Gegendruckerzeugers 20. Die resultierende Pulsation ist mit C bezeichnet.The diagram in FIG. 2 shows the pressure difference .DELTA.p over time t in pump pulsation A and back pressure pulsation B of the piezo back pressure generator 20. The resulting pulsation is designated by C.

Die Fig. 1, 2 veranschaulichen die aktive Dämpfung der Druckpulsation A durch die Erzeugung einer gleichgroßen, aber um 180° versetzten Gegendruckpulsation B, so daß die resultierende Pulsation C möglichst klein gehalten wird. Die Gegendruckpulsation B wird mit Hilfe des Piezo-gesteuerten Elementes 20 erzeugt.1, 2 illustrate the active damping of the pressure pulsation A by generating a counter-pressure pulsation B of the same size but offset by 180 °, so that the resulting pulsation C is kept as small as possible. The back pressure pulsation B is generated with the aid of the piezo-controlled element 20.

Beim Ausführungsbeispiel der Fig. 3, 4 führt die Zweigleitung 18 zu einem durch ein Piezoelement gesteuerten Ventil 21, das an ein Reservoir 11 angeschlossen ist. Hier wird die Pumpenpulsation a dadurch gemindert, daß Druckspitzen durch jenes piezo-gesteuerte Ventil 21 abgeschnitten werden.3, 4, the branch line 18 leads to a valve 21 which is controlled by a piezo element and which is connected to a reservoir 11. Here the pump pulsation a is reduced by cutting off pressure peaks through that piezo-controlled valve 21.

In Fig. 4 ist der Bereich y jener ohne Einsatz des Ventils 21, welches im Bereich Z die beschriebene Wirkung erzeugt.4, the area y is that without the use of the valve 21, which produces the described effect in the area Z.

Claims (9)

1. Vorrichtung zum Bewegen von Strömungsmedien, insbesondere Flüssigkeiten, in einer Förderleitung mittels einer Pumpe,
dadurch gekennzeichnet,
daß in einer Zweigleitung (18) der Förderleitung (14) ein Piezo-Gegendruckerzeuger (20) angeordnet ist.1. Device for moving flow media, in particular liquids, in a delivery line by means of a pump,
characterized,
that a piezo back pressure generator (20) is arranged in a branch line (18) of the delivery line (14). 2. Vorrichtung zum Bewegen von Strömungsmedien, insbesondere Flüssigkeiten, in einer Förderleitung mittels einer Pumpe, dadurch gekennzeichnet, daß in einer Zweigleitung (18) der Förderleitung (14) ein mit einem Piezoelement gesteuertes Ventil (21) angeordnet ist.2. Device for moving flow media, in particular liquids, in a delivery line by means of a pump, characterized in that a valve (21) controlled by a piezo element is arranged in a branch line (18) of the delivery line (14). 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß das Ventil (21) an ein Flüssigkeitsreservoir (11) angeschlossen ist.3. Apparatus according to claim 2, characterized in that the valve (21) is connected to a liquid reservoir (11). 4. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß das Ventil (21) an die Saugleitung der Pumpe (12) angeschlossen ist.4. The device according to claim 2, characterized in that the valve (21) is connected to the suction line of the pump (12). 5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Zweigleitung (18) der Pumpe (12) nachgeschaltet ist.5. Device according to one of claims 1 to 4, characterized in that the branch line (18) of the pump (12) is connected downstream. 6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß in der Zweigleitung (18) dem Piezoelement (20, 21) ein Regler (24) mit Meßwertaufnehmer (26) nachgeschaltet ist.6. Device according to one of claims 1 to 5, characterized in that in the branch line (18), the piezo element (20, 21) is followed by a controller (24) with transducer (26). 7. Vorrichtung nach Anspruch 6, gekennzeichnet durch einen Meßwertaufnehmer (26) mit elektrischem Ausgangssignal.7. The device according to claim 6, characterized by a transducer (26) with an electrical output signal. 8. Verfahren zum Bewegen von Strömungsmedien, insbesondere Flüssigkeiten, in einer Förderleitung, dadurch gekennzeichnet, daß mittels eines Gegendruck erzeugenden Piezoelementes eine um 180°C versetzte Gegendruckpulsation gleicher Größe zur Pumpenpulsation erzeugt und eine Dämpfung durch eine resultierende Pulsation durchgeführt wird.8. A method for moving flow media, in particular liquids, in a delivery line, characterized in that a counter pressure pulsation of the same size, offset by 180 ° C, is generated for pump pulsation by means of a piezoelectric element and a damping is carried out by a resulting pulsation. 9. Verfahren zum Bewegen von Strömungsmedien, insbesondere von Flüssigkeiten, in einer Förderleitung, dadurch gekennzeichnet, daß Druckspitzen der Pumpenpulsation durch ein von einem Piezoelement gesteuertes Ventil abgeschnitten werden.9. A method for moving flow media, in particular liquids, in a delivery line, characterized in that pressure peaks of the pump pulsation are cut off by a valve controlled by a piezo element.
EP19890123724 1988-12-28 1989-12-22 Device and method for moving fluid mediums Withdrawn EP0379718A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19883844059 DE3844059A1 (en) 1988-12-28 1988-12-28 DEVICE AND METHOD FOR MOVING FLUID MEDIA
DE3844059 1988-12-28

Publications (2)

Publication Number Publication Date
EP0379718A2 true EP0379718A2 (en) 1990-08-01
EP0379718A3 EP0379718A3 (en) 1990-11-22

Family

ID=6370367

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890123724 Withdrawn EP0379718A3 (en) 1988-12-28 1989-12-22 Device and method for moving fluid mediums

Country Status (2)

Country Link
EP (1) EP0379718A3 (en)
DE (1) DE3844059A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995026470A1 (en) * 1994-03-28 1995-10-05 Robert Bosch Gmbh Variable displacement electro-hydraulic pump
DE19706635A1 (en) * 1997-02-20 1998-09-03 Zahnradfabrik Friedrichshafen Pressure pulsation damping arrangement for pump
WO2010063661A2 (en) * 2008-12-05 2010-06-10 Siemens Vai Metals Technologies Gmbh & Co Method and device for actively suppressing pressure oscillations in a hydraulic system
WO2010063664A1 (en) * 2008-12-05 2010-06-10 Siemens Vai Metals Technologies Gmbh & Co Method and device for the semi-active reduction of pressure oscillations in a hydraulic system
WO2014151420A3 (en) * 2013-03-15 2015-03-05 Lord Corporation Fluid flow normalizer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4302977A1 (en) * 1993-02-03 1994-03-31 Bosch Gmbh Robert Hydraulic plant with pump or motor - generates 180 deg. phase-displaced compensation wave against uneven surface of pressure medium flow

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2217020A1 (en) * 1972-04-08 1973-10-25 Bran & Luebbe PROCESS AND DEVICE FOR LOW PULSATION DOSING OF SEVERAL LIQUID COMPONENTS OF A MIXTURE
DE3214619A1 (en) * 1981-04-22 1982-11-18 Sharp K.K., Osaka DEVICE FOR SMOOTHING PERIODIC PRESSURE VARIATIONS IN A LIQUID DELIVERY SYSTEM
EP0292994A2 (en) * 1987-05-29 1988-11-30 Hitachi, Ltd. Apparatus for transferring small amount of fluid

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3007116C2 (en) * 1980-02-26 1986-11-20 Walter Hofmann, Maschinenfabrik, 2084 Rellingen Arrangement for pulsation-free delivery of a liquid medium
DE3203722C2 (en) * 1982-02-04 1985-08-01 Gynkotek Gesellschaft für den Bau wissenschaftlich-technischer Geräte mbH, 8000 München Thrust piston pump for low-pulsation pumping of a liquid

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2217020A1 (en) * 1972-04-08 1973-10-25 Bran & Luebbe PROCESS AND DEVICE FOR LOW PULSATION DOSING OF SEVERAL LIQUID COMPONENTS OF A MIXTURE
DE3214619A1 (en) * 1981-04-22 1982-11-18 Sharp K.K., Osaka DEVICE FOR SMOOTHING PERIODIC PRESSURE VARIATIONS IN A LIQUID DELIVERY SYSTEM
EP0292994A2 (en) * 1987-05-29 1988-11-30 Hitachi, Ltd. Apparatus for transferring small amount of fluid

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995026470A1 (en) * 1994-03-28 1995-10-05 Robert Bosch Gmbh Variable displacement electro-hydraulic pump
DE19706635A1 (en) * 1997-02-20 1998-09-03 Zahnradfabrik Friedrichshafen Pressure pulsation damping arrangement for pump
WO2010063661A2 (en) * 2008-12-05 2010-06-10 Siemens Vai Metals Technologies Gmbh & Co Method and device for actively suppressing pressure oscillations in a hydraulic system
WO2010063664A1 (en) * 2008-12-05 2010-06-10 Siemens Vai Metals Technologies Gmbh & Co Method and device for the semi-active reduction of pressure oscillations in a hydraulic system
WO2010063661A3 (en) * 2008-12-05 2010-07-29 Siemens Vai Metals Technologies Gmbh & Co Method and device for actively suppressing pressure oscillations in a hydraulic system
CN102271832A (en) * 2008-12-05 2011-12-07 西门子Vai金属科技有限责任公司 Method and device for the semi-active reduction of pressure oscillations in a hydraulic system
RU2526647C2 (en) * 2008-12-05 2014-08-27 Сименс Фаи Металз Текнолоджиз Гмбх Method and device for active suppression of pressure oscillations in hydraulic system
WO2014151420A3 (en) * 2013-03-15 2015-03-05 Lord Corporation Fluid flow normalizer
US10487823B2 (en) 2013-03-15 2019-11-26 Lord Corporation Fluid flow normalizer

Also Published As

Publication number Publication date
EP0379718A3 (en) 1990-11-22
DE3844059A1 (en) 1990-08-30

Similar Documents

Publication Publication Date Title
DE60309108T2 (en) Fluidic system with constant flow rate
DE07117293T1 (en) Vacuum-supported tissue treatment system
EP0398902B1 (en) System for controlling drive slippage
DE2339127C3 (en) Spray coating device
EP0379718A2 (en) Device and method for moving fluid mediums
DE3018872C2 (en)
EP0141061A1 (en) Method and device for controlling a variable
CH679944A5 (en)
DE3512222A1 (en) METHOD AND DEVICE FOR FLOW MECHANICAL PUMPS
EP0243675A1 (en) Method of pulsation damping at piston compressors
DE3235025A1 (en) SUCTION DEVICE FOR APPLICATION OF SUCTION ELECTRODES AND FOR SUCTION MASSAGE
DE4021123A1 (en) Cross-flow membrane filtration of cells from liq. - which is propelled by gas pressure from alternately operated containers
DE4243075A1 (en) Control system for hydraulic pump
DE69523164T2 (en) METHOD AND DEVICE FOR APPLYING A FLUID TO A SURFACE
DE3016943A1 (en) HYDRAULIC SYSTEM WITH TWO PUMPS
DE2202240A1 (en) Device for generating a pulsating flow of fluids
DE3444169A1 (en) Arrangement for optimising the operation of vacuum pump installations
DE10216170A1 (en) Membrane filter assembly, for micro- and ultra-filtration, has a continuous membrane back flushing action changing between modules, to prevent clogging though built-up deposits
EP0907423A1 (en) Method and device for the metered application of liquids to material webs
DE8133609U1 (en) &#34;DEVICE FOR CONTROLLING A CENTRIFUGAL SPELLER&#34;
EP1266141A1 (en) Oscillating armature diaphragm pump
DE2438170C2 (en) Device for carrying out the method according to DBP 23 48 807 for separating tartar from wine or sparkling wine
DE102012101861A1 (en) Micropump, has housing with inlet region and outlet region, and electrical operated excitation element for creation of movement of movable membrane, and gas-permeable and liquid-impermeable fabric arranged over inlet region
DE2219638A1 (en) Process for concentrating egg products by ultrafiltration
DE3014280C2 (en)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

RBV Designated contracting states (corrected)

Designated state(s): AT CH DE ES FR GB IT LI NL SE

18W Application withdrawn

Withdrawal date: 19901031