EP0286792A2 - Mécanisme moteur pour pompe, notamment une pompe doseuse à liquides - Google Patents

Mécanisme moteur pour pompe, notamment une pompe doseuse à liquides Download PDF

Info

Publication number
EP0286792A2
EP0286792A2 EP88101750A EP88101750A EP0286792A2 EP 0286792 A2 EP0286792 A2 EP 0286792A2 EP 88101750 A EP88101750 A EP 88101750A EP 88101750 A EP88101750 A EP 88101750A EP 0286792 A2 EP0286792 A2 EP 0286792A2
Authority
EP
European Patent Office
Prior art keywords
eccentric
motor shaft
pump
rotation
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Withdrawn
Application number
EP88101750A
Other languages
German (de)
English (en)
Other versions
EP0286792A3 (fr
Inventor
Rudi Siller
Heinrich Dipl.-Ing. Seibel (Fh)
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.)
Cillit Wassertechnik & Co GmbH
Original Assignee
Cillit Wassertechnik & Co GmbH
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 Cillit Wassertechnik & Co GmbH filed Critical Cillit Wassertechnik & Co GmbH
Publication of EP0286792A2 publication Critical patent/EP0286792A2/fr
Publication of EP0286792A3 publication Critical patent/EP0286792A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • F04B49/12—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 varying the length of stroke of the working members
    • F04B49/123—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 varying the length of stroke of the working members by changing the eccentricity of one element relative to another element
    • 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

Definitions

  • the invention relates to a drive device for a pump, in particular a liquid metering pump, of the type specified in the preamble of claim 1.
  • Known metering pumps with an electric motor drive of this type have a reduction gear via which an eccentric is driven, which acts on the pump plunger with its outer surface.
  • the return stroke is carried out with a return spring.
  • a stroke limiter can also be provided, which is adjustable from the outside. This principle can be used for both diaphragm pumps and piston pumps.
  • the motor power is only used for the forward stroke of the pump tappet. The engine is turned back empty on the return stroke.
  • the force F actually to be used to advance the pump tappet increases steadily from a lower initial value at the rear dead center to a maximum value at the front dead center. This increase is primarily due to the gradual compression of the return spring in the feed direction.
  • the drive motor must be designed with regard to its power and thus its torque M such that, taking into account the power transmission characteristic F ( ⁇ ), the force in each angular position ⁇ is sufficient to overcome the counterforce K acting on the tappet.
  • the critical point in this regard occurs near the minimum of the F ( ⁇ ) curve. In the known metering pumps, however, this means that the available engine power remains unused over a large part of the stroke cycle, in particular during the return stroke, so that on average an oversizing of the motor is required.
  • the invention has for its object to provide a drive device of the type specified, with which even without energy storage With simple kinematic precautions, an improvement in the overall efficiency and thus a reduction in the nominal power of the drive motor used can be achieved for a given pump power.
  • the solution according to the invention is based on the idea of influencing the force transmission characteristic F ( ⁇ ) between the motor, eccentric and pump tappet with the aid of the simplest possible kinematic means without energy storage in such a way that the minimum of the force transmission is expanded in a plateau-like manner with a small range of fluctuation and as wide as possible is simultaneously raised compared to the minimum of the parabolic shape with a directly driven circular eccentric disc.
  • these precautions can also be formulated in such a way that the feed speed of the ram in the pre-stroke phase over a range of rotation angle of the motor shaft at least 160 °, preferably from 240 ° to 290 °, has a plateau-like maximum with a fluctuation range of less than 35%, preferably less than 15%, based on the maximum value of the feed rate.
  • this goal can already be achieved in that the power transmission and / or transmission means arranged between the motor shaft and the pump tappet are used to set an extension of the preliminary stroke phase beyond a rotation angle range of the motor shaft of more than 180 °, at the expense of the return phase angular range to be traversed.
  • a smaller transmission ratio and thus a lower power requirement in the pre-stroke phase are sufficient, so that a smaller motor dimensioning is possible for a given pump output. This then leads to a faster return stroke.
  • this is not a disadvantage.
  • a gearbox with a variable step-down and transmission ratio is arranged between the drive shaft and the eccentric depending on the angle of rotation of the motor shaft.
  • a transmission can be realized, for example, by two equal-sized elliptical wheels that roll on each other on their circumference, preferably carrying a ring gear, one of which is coupled directly to the motor shaft near its one focal point and the other close to its one focal point by one to the other Motor shaft parallel, arranged at a distance from this axis is rotatable.
  • the eccentric which has a circular outline, should in this case be connected to the driven elliptical wheel in such a way that the diameter of the eccentric axis, which coincides with the axis of rotation of the elliptical wheel, is oriented essentially perpendicular to the main direction of the ellipse, which runs through the two focal points of the elliptical wheel .
  • the lateral surface of the eccentric with a circular outline can in this case be formed by the outer ring of a ball bearing arranged on an eccentrically driven shaft.
  • the elliptical gear leads to an approximate solution to the desired goal of a power transmission from the motor to the tappet that is as independent as possible of the angle of rotation ⁇ of the motor shaft in the course of the preliminary stroke phase.
  • an eccentric which can be driven directly via the motor shaft and which has an angular range of min at least 160 °, preferably from 280 ° to 310 °, the outline shape of a spiral widening from an initial radius to an end radius, which is closed in the residual angle range by a smooth outline curve extending between the end radius and the initial radius.
  • the residual angle region of the eccentric curve can have the shape of a straight line or a tapering spiral, in particular an Archimedean spiral, at least in sections.
  • the eccentric consists of hardened steel at least in the area of its outer surface and if the pump tappet is supported on the outer surface with a roller.
  • the drive device shown in FIG. 1 essentially consists of an electric geared motor 18, the gearbox of which additionally has two gearwheels 22, 24 arranged outside the motor housing, an elliptical gear 28,30 driven via the geared motor shaft 24 ⁇ , an eccentric 10 connected to the driven elliptical wheel 30, 15 and a pump plunger 14 with its rear end face 42 against the outer surface 17 of the eccentric under the action of a return spring 12.
  • the pump plunger 14 extends through an axial guide 22 in the housing 20.
  • a frustoconical stop 52 is arranged on the tappet, which can abut against a pin 48 with a conical tip 50 that is axially adjustable in the housing 20.
  • the cylindrical eccentric 10 is guided with its upper cylindrical end in a bearing 16 arranged on the housing.
  • it is loosely mounted together with the elliptical wheel 30 on the shaft 38 which projects from the motor housing and which in turn carries the gear wheel 22 of the outer part of the motor transmission 22, 24.
  • the gear 24 is loosely mounted on the shaft 26 together with the elliptical gear 28.
  • the driving elliptical wheel 28 engages with its ring gear 29 in the ring gear 31 of the driven elliptical wheel 30.
  • an eccentric 10 ⁇ is present, which is driven about the axis 38 ⁇ directly in the direction of arrow 36, and on the outer surface 17 ⁇ , 17 ⁇ the plunger 14 is supported with its rear end face.
  • the outline curve extends on a widening from an initial radius to an end radius Spiral.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
EP88101750A 1987-03-17 1988-02-06 Mécanisme moteur pour pompe, notamment une pompe doseuse à liquides Withdrawn EP0286792A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3708670 1987-03-17
DE19873708670 DE3708670A1 (de) 1987-03-17 1987-03-17 Antriebsvorrichtung fuer eine pumpe, insbesondere fuer eine fluessigkeitsdosierpumpe

Publications (2)

Publication Number Publication Date
EP0286792A2 true EP0286792A2 (fr) 1988-10-19
EP0286792A3 EP0286792A3 (fr) 1990-02-07

Family

ID=6323292

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88101750A Withdrawn EP0286792A3 (fr) 1987-03-17 1988-02-06 Mécanisme moteur pour pompe, notamment une pompe doseuse à liquides

Country Status (2)

Country Link
EP (1) EP0286792A3 (fr)
DE (1) DE3708670A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2662215A1 (fr) * 1990-05-15 1991-11-22 Oreal Dispositif de compression, en particulier pour le remplissage sous pression d'un reservoir.
WO2017194383A1 (fr) * 2016-05-11 2017-11-16 Medela Holding Ag Pompe à vide à membrane
US20180163710A1 (en) * 2016-12-08 2018-06-14 KNAUER Wissenschaftliche Gerãte GMBH Cam mechanism for the implementation of a variable stroke

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1318130A (en) * 1919-10-07 Archilles a
US1202152A (en) * 1915-10-26 1916-10-24 John J Becker Pumping machinery.
DE507099C (de) * 1928-08-14 1930-09-12 E H Hugo Junkers Dr Ing Antrieb fuer mittels einer Hubscheibe bewegte Steuerglieder
US3288079A (en) * 1964-09-24 1966-11-29 Technicon Chromatography Corp Pump
DE2260374A1 (de) * 1972-12-09 1974-06-12 Konrad Stieve Unsymetrisches triebwerk
DE2608664A1 (de) * 1976-03-03 1977-09-08 Niepmann Ag Walchwil Vorrichtung zur erzeugung eines gleichfoermigen foerderstromes
DE3338112A1 (de) * 1983-10-20 1985-05-09 Bran & Lübbe GmbH, 2000 Norderstedt Kolbenpumpe

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2662215A1 (fr) * 1990-05-15 1991-11-22 Oreal Dispositif de compression, en particulier pour le remplissage sous pression d'un reservoir.
EP0461943A3 (en) * 1990-05-15 1992-07-01 L'oreal Compression device, especially for filling a tank under pressure
US5151015A (en) * 1990-05-15 1992-09-29 L'oreal Compression device, particularly for the pressure filling of a container
WO2017194383A1 (fr) * 2016-05-11 2017-11-16 Medela Holding Ag Pompe à vide à membrane
US11147909B2 (en) 2016-05-11 2021-10-19 Medela Holding Ag Diaphragm vacuum pump
US20180163710A1 (en) * 2016-12-08 2018-06-14 KNAUER Wissenschaftliche Gerãte GMBH Cam mechanism for the implementation of a variable stroke

Also Published As

Publication number Publication date
DE3708670A1 (de) 1988-10-06
EP0286792A3 (fr) 1990-02-07

Similar Documents

Publication Publication Date Title
DE2736532C3 (de) Automatische Sprühvorrichtung
DE3113408C1 (de) Hydrodynamische Bremse
DE60220466T2 (de) Rollenpumpe
DD206113A1 (de) Nebenantrieb einer brennkraftmaschine
EP0005444A1 (fr) Tête d'enroulement
EP0560201A1 (fr) Pompe à huile pour une scie à chaîne
DE202007018926U1 (de) Vorrichtung zum Schrägwalzen von rohr- oder stabförmigem Walzgut
DE2816429C2 (de) Mechanischer Pressenantrieb
DE3105649A1 (de) Dosierpumpe
DE19962554A1 (de) Regelbare Pumpe
EP0286792A2 (fr) Mécanisme moteur pour pompe, notamment une pompe doseuse à liquides
DE2716091C3 (de) Tragbare Sprühvorrichtung für Flüssigkeiten
WO1999061795A1 (fr) Regulation de la frequence des courses du piston d'une pompe de dosage
DE2634318A1 (de) Pumpe, vorzugsweise zum dosieren und kalibrieren
DE3231878C1 (de) Pumpe fuer hydraulische Anlagen
DE2716496A1 (de) Druckfluessigkeits-kolbenmaschine
DE3918119A1 (de) Anordnung zur betaetigung mindestens eines linearmotors, insbesondere fuer eine dosiereinrichtung
EP0226737A2 (fr) Mécanisme de commande pour pompe, notamment pompe de dosage de liquides
DE2912254A1 (de) Rotationskolbenmaschine
EP1529165B1 (fr) Pompe a plateau oscillant, en particulier pour appareils de nettoyage haute pression
DE102017126286A1 (de) Vorrichtung und Verfahren zur Variation des Verdichtungsverhältnisses eines Hubkolbenmotors
DE2626449A1 (de) Dreharbeitsmaschine mit verschiebbaren, insbesondere ausfahrbaren und einziehbaren arbeitselementen wie fluegeln oder kolben
DE2740913B2 (de) Kolbenpumpe mit einer Vorrichtung zur stufenlosen Verstellung des Kolbenhubes
DE3038587A1 (de) Antreibbare walze mit steuerbarer durchbiegung, insbesondere fuer maschinen zur erzeugung und verarbeitung von bahnen aus papier oder kunststoff
EP1111234B1 (fr) Pompe à carburant

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 DE ES FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT DE ES FR GB IT

17P Request for examination filed

Effective date: 19900316

17Q First examination report despatched

Effective date: 19910206

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19920124