WO2019029879A1 - Actionneur magnétique pour unité de refoulement - Google Patents

Actionneur magnétique pour unité de refoulement Download PDF

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Publication number
WO2019029879A1
WO2019029879A1 PCT/EP2018/066086 EP2018066086W WO2019029879A1 WO 2019029879 A1 WO2019029879 A1 WO 2019029879A1 EP 2018066086 W EP2018066086 W EP 2018066086W WO 2019029879 A1 WO2019029879 A1 WO 2019029879A1
Authority
WO
WIPO (PCT)
Prior art keywords
armature
magnetic actuator
magnetic
membrane
delivery unit
Prior art date
Application number
PCT/EP2018/066086
Other languages
German (de)
English (en)
Inventor
Peter Boehland
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2019029879A1 publication Critical patent/WO2019029879A1/fr

Links

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
    • 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
    • F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
    • F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
    • 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

Definitions

  • the invention relates to a magnetic actuator for a delivery unit, in particular for a diaphragm pump for an operating / auxiliary substance in a vehicle and to the use of the magnetic actuator.
  • Delivery unit In the delivery unit is in particular a diaphragm pump, which is used to promote an operating / auxiliary material in a
  • Vehicle is used. This includes a spring-loaded armature which extends through a magnetic coil and acts on a membrane. This can either act on a working space of the delivery unit and / or cover a sealing seat of a valve or release.
  • the membrane is connected to the actuator via an intermediate layer.
  • WO 2013/029849 AI relates to a dosing system for a liquid
  • Ventilation pump exists. As a result, on the one hand the injection of urea-water solution is possible and on the other hand is also a safe and
  • the impact speed of the armature can be reduced to the stroke stop.
  • a magnetic actuator for a delivery unit in particular a diaphragm pump for an operating / auxiliary substance in a vehicle
  • an armature which extends through a magnetic coil and acts on a membrane which acts on a working space of the delivery unit.
  • the armature of the magnetic actuator has a shoulder defining an armature stage which generates a drop in magnetic forces as the armature approaches its stroke stop.
  • an anchor design can be achieved by the proposed solution according to the invention, which generates a steeply sloping characteristic of the magnetic force of the magnetic actuator proposed according to the invention.
  • the latter comprises a bottom part which has a peripheral notch on its outer circumference.
  • the armature is traversed by a connecting part, on which the conveying of the operating / auxiliary substance-producing membrane is fixed.
  • This is in particular an elastomeric membrane which can cooperate with supporting parts to avoid excessively large deformations.
  • the membrane in particular designed as an elastomeric membrane, is fastened with at least one undercut.
  • the membrane which is preferably a
  • Elastomeric membrane acts, clamped in a valve plate.
  • a working space is carried out, through which is promoted by the oscillating movement of the membrane operating / auxiliary material.
  • An effective there high magnetic force allows safe starting of the armature even at low currents. Low currents can occur when a low vehicle electrical system voltage in
  • Vehicle electrical system is present or the magnetic coil of the magnetic actuator has a relatively high temperature.
  • the invention further relates to the use of the magnetic actuator in a diaphragm pump for conveying an operating / auxiliary substance,
  • Exhaust after-treatment system for dosing into the exhaust gas tract of an internal combustion engine.
  • Noise emissions may arise. Due to the anchor design with a shoulder which defines an anchor step on the outer circumference of the armature, a steeply sloping magnetic force characteristic can be generated. With rising
  • Another advantage of the proposed solution according to the invention is that due to the steeply sloping magnetic force characteristic also in magnetic force fluctuations, such as by occurrence different currents, only small Hubweg Sungen. This is mainly due to the anchor stage on the outer circumference of the anchor
  • the magnetic force can be increased in the region of the initial air gap.
  • An effective there high magnetic force allows safe starting of the armature even at low currents.
  • Low currents can occur when there is a low vehicle electrical system voltage in the electrical system of the vehicle and the coil temperature is relatively high. Even when these two unfavorable operating parameters coincide, a safe starting of the armature due to the high magnetic force acting at the initial air gap is possible.
  • Figure 1 shows a stationary design of a delivery unit with applied
  • FIG. 2 shows a longitudinal section through a delivery unit with a
  • FIG. 1 shows force profiles of magnetic forces as well as membrane pump forces acting in a membrane pump in the suck-back mode, in each case plotted over an armature stroke and
  • FIG. 2 shows the embodiment of a proposed invention
  • Magnet actuator for actuating a diaphragm pump designed as
  • An inventive delivery unit 48 according to the sectional view in Figure 2 is in a gas aftertreatment system for
  • Reference numeral 14 denotes an initial air gap, which is occupied by an armature 64 (see illustration according to FIG. 2) in the de-energized state.
  • Reference numeral 16 denotes an air gap which remains between a mechanical stop 18 and the armature in the worst case.
  • reference numeral 20 denotes a course of pump forces which act in the delivery mode of the delivery unit 48.
  • Reference numeral 22 designates the pumping forces acting within the delivery unit 48, which occur when conveying air within the delivery unit 48, i. if no operating / auxiliary material is promoted by the delivery unit 48, therefore, in the sudsaugmodus to be emptied components of the exhaust aftertreatment system are free of operating / auxiliary and therefore only air is promoted.
  • the pump forces according to the courses 20 and 22 are composed of a spring force, a membrane force by the usually as
  • Elastomer membrane formed membrane is also exercised by acting within the delivery unit 48 hydraulic forces and friction forces.
  • the enumerated forces counteract a magnetic force which is generated by a magnetic actuator 50 (cf. illustration according to FIG. 2).
  • an armature stroke 28 which intersects the course 20 of the pump forces in the conveying operation of the delivery unit 48 at a first intersection point 30.
  • the first intersection point 30 is farthest from the mechanical stop 18, consequently, no mechanical stop and consequently no noise emission arise.
  • an armature stroke 32 sets, which leads together with the curve 26 of the maximum magnetic force to a second intersection 34.
  • the maximum magnetic force holds according to the course 26 with the course 20 of the
  • Figure 2 shows an embodiment of a magnetic actuator 50, which leads to the outlined in Figure 1 gradients 24 and 26 for a minimum magnetic force and a maximum magnetic force.
  • FIG. 2 shows that the delivery unit 48 comprises the magnetic actuator 50.
  • the magnetic actuator 50 comprises a magnetic coil 52 which is surrounded by a coil holder 82.
  • the magnetic actuator 50 further includes a bottom portion 66 which is movable with respect to an axis of symmetry 68 of the
  • Delivery unit 48 is shown only half, also a jacket 84 and a back plate 86.
  • the bottom part 66 surrounds an armature 64.
  • the armature 64 performs a lifting movement 60 according to the double arrow shown in Figure 2.
  • the armature 64 is connected via a connecting part 58 with an elastomeric membrane 56.
  • a working space is acted upon.
  • the working space 62 of promoting plant / excipient is promoted, which is a freezeable urea-water solution.
  • the inflows and outflows into or out of the valve plate 54 are connected to the
  • Elastomeric membrane 56 an oscillating movement, whereby a Promotion of the operating / auxiliary materials through the working space 62 is made possible.
  • the armature 64 is connected to the connecting part 58 along a contact surface 78.
  • the armature 64 includes a shoulder 70 that defines an armature stage 72 in the armature 64.
  • the shoulder 70 which defines the armature stage 72, has a reduced diameter compared to the other diameter of the armature 64.
  • the magnetic actuator 50 proposed according to the invention is designed with respect to the bottom part 66 such that the bottom part has a notch 74 on its outer circumference 76.
  • both the notch 74 on the outer circumference 76 of the bottom part and the anchor step 72 are approximately at the same height with respect to each other.
  • the elastomer membrane 56 shown in half section in FIG. 2 is fastened in a form-fitting manner to the connecting part 58 by means of at least one undercut 80.
  • the connecting part 58 which is enclosed by the armature 64, an oscillating movement, namely the conveying movement is introduced into the elastomeric membrane 56.
  • the elastomeric membrane 56 may be used to limit its deformation in the
  • FIG. 1 shows that in the region shortly after

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne un actionneur magnétique (50) destiné à une unité de refoulement (48), en particulier une pompe à membrane destinée à une substance consommable secondaire dans un véhicule. L'actionneur magnétique (50) comprend un induit (64) qui s'étend à travers une bobine magnétique (52) et qui agit sur une membrane (56) qui sollicite un espace de travail (62) de l'unité de refoulement (48). L'induit (64) de l'actionneur magnétique (50) comporte un épaulement (70) qui définit un étage d'induit (72) et qui génère une baisse des forces magnétiques (24, 26) lorsque l'induit (64) se rapproche d'une butée mécanique (18).
PCT/EP2018/066086 2017-08-10 2018-06-18 Actionneur magnétique pour unité de refoulement WO2019029879A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017213958.7 2017-08-10
DE102017213958.7A DE102017213958A1 (de) 2017-08-10 2017-08-10 Magnetaktor für ein Förderaggregat

Publications (1)

Publication Number Publication Date
WO2019029879A1 true WO2019029879A1 (fr) 2019-02-14

Family

ID=62683218

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/066086 WO2019029879A1 (fr) 2017-08-10 2018-06-18 Actionneur magnétique pour unité de refoulement

Country Status (2)

Country Link
DE (1) DE102017213958A1 (fr)
WO (1) WO2019029879A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB403209A (en) * 1932-10-19 1933-12-21 Raymond Leslie Kent Improvements relating to electrically operated pumps
DE3719939A1 (de) * 1986-06-14 1987-12-17 Lohberg Hans Martin Elektromagnetische membranpumpe
DE3921084A1 (de) * 1989-06-28 1991-01-10 Richter Siegfried Dipl Ing Fh Elektrisch angetriebene membran-saug- oder druckpumpe
WO2013029849A1 (fr) 2011-08-26 2013-03-07 Robert Bosch Gmbh Système de dosage d'un agent de réduction liquide
DE102013211164A1 (de) * 2013-06-14 2014-12-31 Robert Bosch Gmbh Magnetaktor für ein Förderaggregat
DE102014201389A1 (de) * 2014-01-27 2015-07-30 Robert Bosch Gmbh Elektromagnetische Stellvorrichtung für ein Magnetventil sowie Magnetventil
DE102015209728A1 (de) * 2015-05-27 2016-12-01 Robert Bosch Gmbh Pumpeneinrichtung, Bremssystem
DE102015226463A1 (de) 2015-12-22 2017-06-22 Robert Bosch Gmbh Magnetaktor für ein Förderaggregat

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB403209A (en) * 1932-10-19 1933-12-21 Raymond Leslie Kent Improvements relating to electrically operated pumps
DE3719939A1 (de) * 1986-06-14 1987-12-17 Lohberg Hans Martin Elektromagnetische membranpumpe
DE3921084A1 (de) * 1989-06-28 1991-01-10 Richter Siegfried Dipl Ing Fh Elektrisch angetriebene membran-saug- oder druckpumpe
WO2013029849A1 (fr) 2011-08-26 2013-03-07 Robert Bosch Gmbh Système de dosage d'un agent de réduction liquide
DE102013211164A1 (de) * 2013-06-14 2014-12-31 Robert Bosch Gmbh Magnetaktor für ein Förderaggregat
DE102014201389A1 (de) * 2014-01-27 2015-07-30 Robert Bosch Gmbh Elektromagnetische Stellvorrichtung für ein Magnetventil sowie Magnetventil
DE102015209728A1 (de) * 2015-05-27 2016-12-01 Robert Bosch Gmbh Pumpeneinrichtung, Bremssystem
DE102015226463A1 (de) 2015-12-22 2017-06-22 Robert Bosch Gmbh Magnetaktor für ein Förderaggregat

Also Published As

Publication number Publication date
DE102017213958A1 (de) 2019-02-14

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