EP0043939A1 - Electromagnetic metering pump - Google Patents

Electromagnetic metering pump Download PDF

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Publication number
EP0043939A1
EP0043939A1 EP81104718A EP81104718A EP0043939A1 EP 0043939 A1 EP0043939 A1 EP 0043939A1 EP 81104718 A EP81104718 A EP 81104718A EP 81104718 A EP81104718 A EP 81104718A EP 0043939 A1 EP0043939 A1 EP 0043939A1
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EP
European Patent Office
Prior art keywords
handwheel
bearing
axis
pump according
armature
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.)
Granted
Application number
EP81104718A
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German (de)
French (fr)
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EP0043939B1 (en
Inventor
Rudi Siller
Hermann Steil
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Cillichemie Ernst Vogelmann GmbH and Co
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Cillichemie Ernst Vogelmann GmbH and Co
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Publication of EP0043939A1 publication Critical patent/EP0043939A1/en
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Publication of EP0043939B1 publication Critical patent/EP0043939B1/en
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    • 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

Definitions

  • the invention relates to a magnetic metering pump of the type specified in the preamble of claim 1. Dosing pumps of this type are primarily intended to add precisely measured amounts of water to an active substance liquid.
  • a magnetic metering pump of this type is known (DE-GM 71 19 904), in which the stroke adjustment is carried out via a handwheel guided in a thread fixed to the housing.
  • the thread only forms a linear system and thus leaves something to be desired in terms of susceptibility to wear and setting accuracy, especially after high continuous loads.
  • the armature which is designed as a cylindrical DC armature, is guided within the stationary part of the magnet in a structurally quite complex PFTE lead plain bearing with a relatively large diameter, and that the return spring is also arranged in a lubricated chamber and hardened on the inside Ring is guided so that it can be supported on the fixed part of the magnet.
  • the known magnet On the diaphragm side, the known magnet is flanged to a metal mounting plate, which is part of the housing that also contains the control electronics. Thereby the heat dissipation from the magnet, which heats up strongly during operation, is promoted into the housing, as a result of which the electronics in the housing heat up undesirably, which can lead to malfunctions.
  • the invention is accordingly based on the object to improve the known solenoid metering pump of the type specified in the preamble of claim 1 in such a way that a constant, precise stroke setting is ensured even under continuous loads, and that the susceptibility to malfunctions caused by wear and tear and the undesired heating of electronic components is reduced .
  • the precautions according to the invention ensure, due to the large-area contact surfaces provided in the stroke adjustment mechanism and the relatively simple, low-wear mounting of the magnet armature and the return spring, that they are less susceptible to wear and that the stroke setting is permanently good. Because of the special Arranging the stroke adjustment mechanism in an intermediate area between the lifting magnet and the control electronics ensures a good thermal separation between these parts, which prevents undesired heating of the electronic components.
  • the latter can be further improved in that the magnet yoke and the magnet armature each consist of a laminated core held together by rivets despite pulsed direct current operation in the manner of an alternating current magnet, and that the magnet yoke carries a cooling body provided with cooling fins on its outer surface.
  • the solenoid metering pump consists of a lifting magnet 12 carrying a finned heat sink 10, a pump part 14 located on the rear of the lifting magnet, a stroke adjusting mechanism 16 arranged on the front of the lifting magnet and control electronics 22 arranged in a housing part 20 'separated by a partition 18 from the stroke adjusting mechanism
  • the stroke magnet 12 can be acted upon by a pulsed direct current via the control electronics 22, so that a pump stroke is triggered with each current pulse.
  • the plastic housing 20 is screwed onto the heat sink 10 with a housing extension 20 ′′ that extends over the stroke adjustment mechanism 16.
  • the stroke frequency set on the rotary knob 26, the pump stroke set on the handwheel 28 and the frequency and level indicators signaled by light-emitting diodes 30 can be seen from the outside through a transparent hinged cover 24 located on the housing 20. After the hinged cover 24 has been folded up against the force of the two tension springs 32, for which purpose a seal 34 may first have to be released, the rotary knob 26 and the handwheel 28 are accessible from the outside for adjusting the stroke frequency and the pump stroke.
  • the stroke rate is automatically controlled in accordance with the output from a water meter signals via the control electronics, so that an F requenzeingnagna is dispensable from the outside and thus the knob is omitted 26th
  • a pushbutton switch is provided in this case, with which a pumping process can be triggered manually for testing purposes.
  • the magnetic metering pump is fixed to the wall by means of a mounting bracket 36, which can be clamped to the ribs 40 of the heat sink 10 with suitable strap shoes 38 made of a vibration-damping rubber-elastic material and can be locked with the aid of a wire strap 42 against accidental sliding out of the heat sink to the rear.
  • the lifting magnet 12 consists of a U-shaped magnet yoke 46 located in a cup-shaped recess 44 of the cooling body 10 designed as a yoke housing, a magnet coil 48 fastened to the magnet yoke with the aid of a casting resin, and a T-shaped one Armature 50.
  • the aluminum heat sink is shrunk onto the magnetic yoke using the die-casting process, so that good heat transfer is ensured.
  • the magnetic yoke 46 and the armature 50 exist according to Art of an alternating current magnet from a laminated core held together with rivets. Especially for larger quantities it can o be sten endedn.vorteilhaft to produce the yoke and armature of a pultruded or sintered magnetizable material from K.
  • the armature 50 is rigidly connected to a guide rod 52 which overlaps the armature in a central bore projecting forwards and backwards.
  • the rod 52 engages through a circular arc-shaped elongated hole 66 of the handwheel 28 concentric with the bearing journal 64 and through a guide bush 68 in a bearing bridge 72 designed as a die-cast part and rigidly connected to the yoke housing with the aid of the screws 70 carries a radially projecting metal disk 74 at its front end. Between the disk 74 and the bottom 76 of an annular groove 78 provided on the bearing bridge 72, a return spring 80 designed as a compression spring is clamped, which rests the armature 50 against the stop surface 82 on the handwheel 82 when the magnet coil 48 is de-energized 28 presses.
  • the washer 84 on the stop surface 82 made of an elastomeric material, like the elastic round cords 88 located in the undercut grooves 86 of the anchor 50, has the function of reducing noise and wear.
  • the bearing pin 64 of the handwheel 28 which is designed as a hollow pin, there is a further compression spring 90 which is supported by a plunger 92 on the opposite anchor surface 94 and ensures that the handwheel 28 with its surface 96 opposite the stop surface 82 constantly bears against the counter surface 98 abuts the bearing bridge.
  • the two contact surfaces 96, 98 are wedge-like in relation to the stop surface 82 in a course concentric with the bearing journal 64, so that when Rotation of the handwheel 82 mounted with the bearing pin 64 in the bearing eye 100 of the bearing bridge 72 results in a parallel displacement of the stop surface 82 and thus a stroke adjustment of the armature 50 and the diaphragm pump.
  • the stop surface 96 on the handwheel is reduced by a circumferential groove 102.
  • the two pawls 108 which are formed in the area of a side wall opening 104 of the housing extension 20 'and which engage in a circumferential knurling 106 of the handwheel 28 ensure that a stroke setting which has been adjusted cannot change inadvertently or automatically.

Abstract

1. A metering pump comprising : a plunger (52') connected to an armature (50) of a lifting magnet (12) and, at one of its ends, carrying a piston or acting on a diaphragm (62) ; a return spring (80) which, in the de-energized condition of the magnet coil, urges the armature (50) or a part connected thereto against a stop (82) which limits the stroke of the pump ; a handwheel (28) which has an end-face forming the stop (82) and which is displaceable from the exterior by being rotated about an axis parallel to the axis of the plunger ; and also an electronic control means (22) which supplies pulsating direct current to the magnet coil (48) and is located in a housing part (20') arranged outside the zone of the lifting magnet, characterized in that the handwheel (28) is mounted on a bearing support (72), connected to the magnet yoke (46), and is rotatable about an axis (bearing pin 64) which is arranged off-centre from the axis (52) of the plunger, the handwheel comprising a safety means (grooving 106 and a pawl 108) for preventing unrequired rotation, in that the bar (52), forming the pump plunger (52'), extends, at its end lying opposite the piston or the diaphragm (62), through an arcuate slot (66) formed in the handwheel (28) and concentric with the axis of rotation (bearing pin 64), and through a guide bush (68) associated with the bearing support (72), said bar (52) having, at the projecting end, an abutment face (disc 74) for the return spring (80) which also bears against the outer face (bottom 76) of the bearing support (72), in that the handwheel (28), in a zone around the slot (66), and the bearing support (72), in a zone around the guide bush (68), bear against each other, over a large surface, at mutually corresponding wedge faces (96, 98), which are concentric with the axis of rotation (bearing pin 64) and are located opposite the stop face (82), and in that the housing part (20'), containing the electronic control means (22), is thermally separated from the zone containing the lifting magnet (12) by an intermediate zone containing the handwheel (28) and the bearing support (72).

Description

Die Erfindung betrifft eine Magnetdosierpumpe der im Oberbegriff des Anspruchs 1 angegebenen Gattung. Derartige Dosierpumpen sind vor allem dazu bestimmt, genau bemessene Mengen einer Wirkstoff-Flüssigkeit strömendem Wasser zuzusetzen.The invention relates to a magnetic metering pump of the type specified in the preamble of claim 1. Dosing pumps of this type are primarily intended to add precisely measured amounts of water to an active substance liquid.

Es ist eine Magnetdosierpumpe dieser Art bekannt (DE-GM 71 19 904), bei der die Hubverstellung über ein in einem gehäusefesten Gewinde geführtes Handrad erfolgt. Das Gewinde bildet nur eine linienförmige Anlage und läßt somit hinsichtlich der Verschleißanfälligkeit und Einstellgenauigkeit vor allem nach hohen Dauerbelastungen zu wünschen übrig. Hinzu kommt, daß dort der als zylindrischer Gleichstromanker ausgebildete Anker innerhalb des feststehenden Teils des Magneten in einem konstruktiv recht aufwendigen PFTE-Blei-Gleitlager mit relativ großem Durchmesser geführt ist und daß auch die Rückstellfeder in einer geschmierten Kammer angeordnet und auf der Innenseite an einem gehärteten Ring geführt ist, um sich am feststehenden Teil des Magneten abstützen zu können. Auf der Membranseite ist der bekannte Magnet an einer metallischen Montageplatte angeflanscht, die Bestandteil des Gehäuses ist, das auch die Steuerungselektronik enthält. Dadurch wird die Wärmeableitung von dem sich im Betrieb stark aufheizenden Magneten in das Gehäuse begünstigt, wodurch sich die im Gehäuse befindliche Elektronik unerwünscht aufheizt, was zu Betriebsstörungen führen kann.A magnetic metering pump of this type is known (DE-GM 71 19 904), in which the stroke adjustment is carried out via a handwheel guided in a thread fixed to the housing. The thread only forms a linear system and thus leaves something to be desired in terms of susceptibility to wear and setting accuracy, especially after high continuous loads. In addition, the armature, which is designed as a cylindrical DC armature, is guided within the stationary part of the magnet in a structurally quite complex PFTE lead plain bearing with a relatively large diameter, and that the return spring is also arranged in a lubricated chamber and hardened on the inside Ring is guided so that it can be supported on the fixed part of the magnet. On the diaphragm side, the known magnet is flanged to a metal mounting plate, which is part of the housing that also contains the control electronics. Thereby the heat dissipation from the magnet, which heats up strongly during operation, is promoted into the housing, as a result of which the electronics in the housing heat up undesirably, which can lead to malfunctions.

Der Erfindung liegt dementsprechend die Aufgabe zugrunde, die bekannte Magnetdosierpumpe der im Oberbegriff des Anspruchs 1 angegebenen Art dahingehend zu verbessern, daß auch bei Dauerbelastungen eine gleichbleibende, genaue Hubeinstellung gewährleistet ist, und daß die durch Verschleißerscheinungen und die unerwünschte Aufheizung von Elektronikbauteilen bedingte Störungsanfälligkeit verringert wird.The invention is accordingly based on the object to improve the known solenoid metering pump of the type specified in the preamble of claim 1 in such a way that a constant, precise stroke setting is ensured even under continuous loads, and that the susceptibility to malfunctions caused by wear and tear and the undesired heating of electronic components is reduced .

Zur Lösung dieser Aufgabe wird die im Kennzeichenteil des Anspruchs 1 angegebene Merkmalskombination vorgeschlagen. Weitere vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.To achieve this object, the combination of features specified in the characterizing part of claim 1 is proposed. Further advantageous refinements and developments of the invention result from the subclaims.

Die erfindungsgemäßen Vorkehrungen gewährleisten aufgrund der beim Hubverstellmechanismus vorgesehenen großflächigen Anlageflächen und der relativ einfachen verschleißarmen Lagerung des Magnetankers und der Rückstellfeder eine geringe Verschleißanfälligkeit und eine dauerhaft gute Genauigkeit der Hubeinstellung. Aufgrund der besonderen Anordnung des Hubverstellmechanismus in einem Zwischenbereich zwischen dem Hubmagneten und der Steuerungselektronik ist eine gute thermische Trennung zwischen diesen Teilen gewährleistet, die eine unerwünschte Aufheizung der elektronischen Bauteile verhindert. Letzteres kann dadurch noch verbessert werden, daß das Magnetjoch und der Magnetanker trotz gepulsten Gleichstrombetriebs nach Art eines Wechselstrommagneten aus je einem durch Nieten zusammengehaltenen Blechpaket bestehen, und daß das Magnetjoch an seiner Mantelfläche einen mit Kühlrippen versehenen Kühlkörper trägt.The precautions according to the invention ensure, due to the large-area contact surfaces provided in the stroke adjustment mechanism and the relatively simple, low-wear mounting of the magnet armature and the return spring, that they are less susceptible to wear and that the stroke setting is permanently good. Because of the special Arranging the stroke adjustment mechanism in an intermediate area between the lifting magnet and the control electronics ensures a good thermal separation between these parts, which prevents undesired heating of the electronic components. The latter can be further improved in that the magnet yoke and the magnet armature each consist of a laminated core held together by rivets despite pulsed direct current operation in the manner of an alternating current magnet, and that the magnet yoke carries a cooling body provided with cooling fins on its outer surface.

In der Zeichnung ist ein bevorzugtes Ausführungsbeispiel der Erfindung in schematischer Weise dargestellt. Es zeigen

  • Fig. 1 eine Draufsicht auf eine Magnetdosierpumpe;
  • Fig. 2 einen Längsschnitt entlang der Schnittlinie 2 - 2 der Fig. 1:
  • Fig. 3 einen Querschnitt entlang der Schnittlinie 3 - 3 der Fig. 2;
  • Fig. 4 eine Seitenansicht der Lagerbrücke und des Handrades in auseinandergezogener, teilweise geschnittener Darstellung.
In the drawing, a preferred embodiment of the invention is shown in a schematic manner. Show it
  • Figure 1 is a plan view of a solenoid metering pump.
  • 2 shows a longitudinal section along the section line 2 - 2 of FIG. 1:
  • 3 shows a cross section along the section line 3 - 3 of FIG. 2;
  • Fig. 4 is a side view of the bearing bracket and the handwheel in an exploded, partially sectioned illustration.

Die Magnetdosierpumpe besteht aus einem einen berippten Kühlkörper 10 tragenden Hubmagneten 12, einem an der Rückseite des'Hubmagneten befindlichen Pumpenteil 14, einem auf der Vorderseite des Hubmagneten angeordneten Hubverstellmechanismus 16 und einer in einem durch eine Zwischenwand 18 vom Hubverstellmechanismus getrennten Gehäuseteil 20' angeordneten Steuerungselektronik 22. Der Hubmagnet 12 ist über die Steuerungselektronik 22 mit einem gepulsten Gleichstrom beaufschlagbar, so daß bei jedem Stomimpuls ein Pumpenhub ausgelöst wird. Das Kunststoffgehäuse 20 ist mit einem den Hubverstellmechanismus 16 übergreifenden Gehäuseansatz 20" am Kühlkörper 10 angeschraubt.The solenoid metering pump consists of a lifting magnet 12 carrying a finned heat sink 10, a pump part 14 located on the rear of the lifting magnet, a stroke adjusting mechanism 16 arranged on the front of the lifting magnet and control electronics 22 arranged in a housing part 20 'separated by a partition 18 from the stroke adjusting mechanism The stroke magnet 12 can be acted upon by a pulsed direct current via the control electronics 22, so that a pump stroke is triggered with each current pulse. The plastic housing 20 is screwed onto the heat sink 10 with a housing extension 20 ″ that extends over the stroke adjustment mechanism 16.

Durch einen am Gehäuse 20 befindlichen durchsichtigen Klappdeckel 24 hindurch sind von außen her die an dem Drehknopf 26 eingestellte Hubfrequenz, der an dem Handrad 28 eingestellte Pumpenhub sowie die durch Leuchtdioden 30 signalisierten Frequenz- und Niveauanzeigen erkennbar. Nach Hochklappen des Klappdeckels 24 entgegen der Kraft der beiden Zugfedern 32, wozu gegebenenfalls zunächst eine Plombe 34 zu lösen ist, sind der Drehknopf 26 und das Handrad 28 für eine Verstellung der Hubfrequenz und des Pumpenhubs von außen her zugänglich.The stroke frequency set on the rotary knob 26, the pump stroke set on the handwheel 28 and the frequency and level indicators signaled by light-emitting diodes 30 can be seen from the outside through a transparent hinged cover 24 located on the housing 20. After the hinged cover 24 has been folded up against the force of the two tension springs 32, for which purpose a seal 34 may first have to be released, the rotary knob 26 and the handwheel 28 are accessible from the outside for adjusting the stroke frequency and the pump stroke.

Bei einem anderen, in der Zeichnung nicht dargestellten Ausführungsbeispiel wird die Hubfrequenz nach Maßgabe der von einem Wasserzähler abgegebenen Signale automatisch über die Steuerungselektronik gesteuert, so daß eine Frequenzeinstellung von außen entbehrlich ist und damit der Drehknopf 26 entfällt. Zusätzlich ist in diesem Falle ein Tastschalter vorgesehen, mit dem zu Prüfzwecken ein Pumpvorgang von Hand ausgelöst werden kann.In another, not shown in the drawings embodiment, the stroke rate is automatically controlled in accordance with the output from a water meter signals via the control electronics, so that an F requenzeinstellung is dispensable from the outside and thus the knob is omitted 26th In addition, a pushbutton switch is provided in this case, with which a pumping process can be triggered manually for testing purposes.

Die Wandbefestigung der Magnetdosierpumpe erfolgt über einen Befestigungsbügel 36, der mit geeigneten Bügelschuhen 38 aus einem Schwingungsdämpfenden gummielastischen Material an den Rippen 40 des Kühlkörpers 10 festklemmbar und mit Hilfe einer Drahtlasche 42 gegen ein versehentliches rückwärtiges Herausgleiten am Kühlkörper verriegelbar ist.The magnetic metering pump is fixed to the wall by means of a mounting bracket 36, which can be clamped to the ribs 40 of the heat sink 10 with suitable strap shoes 38 made of a vibration-damping rubber-elastic material and can be locked with the aid of a wire strap 42 against accidental sliding out of the heat sink to the rear.

Wie aus Fig. 2 zu ersehen ist, besteht der Hubmagnet 12 aus einem in einer tassenförmigen Aussparung 44 des als Jochgehäuse ausgebildeten Kühlkörpers 10 befindlichen, U-förmigen Magnetjoch 46, einer am Magnetjoch mit Hilfe eines Gießharzes befestigten Magnetspule 48, sowie einem T-förmigen Anker 50. Der aus Aluminium bestehende Kühlkörper ist im Druckgußverfahren auf das Magnetjoch aufgeschrumpft, so daß ein guter Wärmeübergang gewährleistet ist. Das Magnetjoch 46 und der Anker 50 bestehen nach Art eines Wechselstrommagneten aus je einem mit Nieten zusammengehaltenen Blechpaket. Vor allem für größere Stückzahlen kann es aus Kostengründen.vorteilhaft sein, das Joch und den Anker aus einem stranggezogenen oder einem gesinterten magnetisierbaren Material herzustellen.As can be seen from FIG. 2, the lifting magnet 12 consists of a U-shaped magnet yoke 46 located in a cup-shaped recess 44 of the cooling body 10 designed as a yoke housing, a magnet coil 48 fastened to the magnet yoke with the aid of a casting resin, and a T-shaped one Armature 50. The aluminum heat sink is shrunk onto the magnetic yoke using the die-casting process, so that good heat transfer is ensured. The magnetic yoke 46 and the armature 50 exist according to Art of an alternating current magnet from a laminated core held together with rivets. Especially for larger quantities it can o be stengründen.vorteilhaft to produce the yoke and armature of a pultruded or sintered magnetizable material from K.

Der Anker 50 ist starr mit einer Führungsstange 52 verbunden, die den Anker in einer mittigen Bohrung nach vorne und nach hinten überstehend übergreift. Das rückwärtig überstehende, den Pumpenstößel 52' bildende Ende der Stange greift durch eine Lagerbüchse 54 im Magnetjoch hindurch und liegt mit dem stirnseitig aufgeschraubten verbreiterten Kolbenteil 56 gegen die Rückseite der zwischen den starren Teilen 58,60 eingespannten Pumpenmembran 62 an.The armature 50 is rigidly connected to a guide rod 52 which overlaps the armature in a central bore projecting forwards and backwards. The rearward projecting end of the rod which forms the pump plunger 52 'extends through a bearing bush 54 in the magnetic yoke and, with the widened piston part 56 screwed on at the end, lies against the rear of the pump diaphragm 62 clamped between the rigid parts 58, 60.

Auf der dem Pumpenteil 14 gegenüberliegenden Seite greift die Stange 52 durch ein zum Lagerzapfen 64 konzentrisches, kreisbogenförmiges Langloch 66 des Handrades 28 und durch eine Führungsbüchse 68 in einer mit dem Jochgehäuse mit Hilfe-der Schrauben 70 starr verbundenen, als Druckgußteil ausgebildeten Lagerbrücke 72 hindurch und trägt an ihrem stirnseitigen Ende eine radial überstehende Metallscheibe 74. Zwischen der Scheibe 74 und dem Boden 76 einer an der Lagerbrücke 72 vorgesehenen Ringnut 78 ist eine als Druckfeder ausgebildete Rückstellfeder 80 eingespannt, die den Anker 50 bei stromloser Magnetspule 48 gegen die Anschlagfläche 82 am Handrad 28 drückt. Die auf der Anschlagfläche 82 befindliche Ringscheibe 84 aus einem elastomeren Material hat ebenso wie die in den hinterschnittenen Rillen 86 des Ankers 50 befindlichen elastischen Rundschnüre 88 die Funktion einer Geräusch- und Verschleißminderung.On the side opposite the pump part 14, the rod 52 engages through a circular arc-shaped elongated hole 66 of the handwheel 28 concentric with the bearing journal 64 and through a guide bush 68 in a bearing bridge 72 designed as a die-cast part and rigidly connected to the yoke housing with the aid of the screws 70 carries a radially projecting metal disk 74 at its front end. Between the disk 74 and the bottom 76 of an annular groove 78 provided on the bearing bridge 72, a return spring 80 designed as a compression spring is clamped, which rests the armature 50 against the stop surface 82 on the handwheel 82 when the magnet coil 48 is de-energized 28 presses. The washer 84 on the stop surface 82 made of an elastomeric material, like the elastic round cords 88 located in the undercut grooves 86 of the anchor 50, has the function of reducing noise and wear.

Innerhalb des als Hohlzapfen ausgebildeten Lagerzapfens 64 des Handrades 28 befindet sich eine weitere Druckfeder 90, die sich über einen Stößel 92 an der gegenüberliegenden Ankerfläche 94 abstützt und dafür sorgt, daß das Handrad 28 mit seiner der Anschlagfläche 82 gegenüberliegenden Fläche 96 ständig gegen die Gegenfläche 98 an der Lagerbrücke anliegt. Die beiden Anlageflächen 96,98 sind gegenüber der Anschlagfläche 82 in einem zum Lagerzapfen 64 konzentrischen Verlauf keilartig angestellt, so daß beim Verdrehen des mit dem Lagerzapfen 64 in dem Lagerauge 100 der Lagerbrücke 72 gelagerten Handrades 82 eine Parallelverschiebung der Anschlagfläche 82 und damit eine Hubverstellung des Ankers 50 und der Membranpumpe erfolgt. Um die Reibung zwischen Handrad 28 und Lagerbrücke 72 ohne Einbuße an Einstellgenauigkeit zu reduzieren, ist die Anschlagfläche 96 am Handrad durch eine umlaufende Rille 102 verkleinert. Die beiden im Bereich einer Seitenwandöffnung 104 des Gehäuseansatzes 20" angeformten, in' eine Umfangsrändelung 106 des Handrades 28 einrastenden Sperrklinken 108 sorgen dafür, daß sich eine einmal einjustierte Hubeinstellung nicht versehentlich oder selbsttätig ändern kann.Within the bearing pin 64 of the handwheel 28, which is designed as a hollow pin, there is a further compression spring 90 which is supported by a plunger 92 on the opposite anchor surface 94 and ensures that the handwheel 28 with its surface 96 opposite the stop surface 82 constantly bears against the counter surface 98 abuts the bearing bridge. The two contact surfaces 96, 98 are wedge-like in relation to the stop surface 82 in a course concentric with the bearing journal 64, so that when Rotation of the handwheel 82 mounted with the bearing pin 64 in the bearing eye 100 of the bearing bridge 72 results in a parallel displacement of the stop surface 82 and thus a stroke adjustment of the armature 50 and the diaphragm pump. In order to reduce the friction between handwheel 28 and bearing bracket 72 without sacrificing adjustment accuracy, the stop surface 96 on the handwheel is reduced by a circumferential groove 102. The two pawls 108 which are formed in the area of a side wall opening 104 of the housing extension 20 'and which engage in a circumferential knurling 106 of the handwheel 28 ensure that a stroke setting which has been adjusted cannot change inadvertently or automatically.

Claims (12)

1. Dosierpumpe mit einem mit einem Anker (50) eines Hubmagneten (12) verbundenen, an seinem einen Ende einen Kolben tragenden oder auf eine Membran (62) einwirkenden Pumpenstößel (52'), mit einer den Anker (50) oder ein damit verbundenes Teil im stromlosen Zustand der Magnetspule gegen einen den Pumpenhub begrenzenden Anschlag (82) drückenden Rückstellfeder (80), mit einem eine den Anschlag (82) bildende Stirnfläche aufweisenden, gegenüber einem feststehenden Magnetjoch (46) von außen her durch Verdrehen um eine zur Stößelachse parallele Achse verstellbaren Handrad (80) und mit einer die (48) Magnetspule mit gepulstem Gleichstrom beaufschlagenden, in einem außerhalb des Bereichs des Hubmagneten ange-(20') ordneten Gehäuseteil befindlichen Steuerungselektronik (22), dadurch gekennzeichnet , daß das Handrad (28) an einer mit dem Magnetjoch (46) verbundenen Lagerbrücke (72) um eine zur Stößelachse (52) exzentrische Achse (Lagerzapfen 64) drehbar gelagert ist, daß die den Stößel (52') bildende Stange (52) mit ihrem dem Kolben oder der Membran (62) gegenüberliegenden Ende durch ein zur Drehachse (Lagerzapfen 64) konzentrisches, kreisbogenförmiges Langloch (66) des Handrades (28) und durch eine Führungsbüchse (68) der Lagerbrücke (72) hindurchgreift und am überstehenden Ende eine Abstützfläche (Scheibe 74) für die sich außerdem an der Außenfläche (Boden 76) der Lagerbrücke (72) abstützende Rückstellfeder (80) enthält, daß das Handrad (28) in einem Bereich um das Langloch (66) und die Lagerbrücke in einem Bereich um die Führungsbüchse (68) an einander entsprechenden, konzentrisch zur Drehachse (Lagerzapfen 64) gegenüber der Anschlagfläche (82) angestellten Keilflächen (96,98) großflächig gegeneinander anliegen, und daß der die Steuerungselektronik (22) enthaltende Gehäuseteil (20') durch einen das Handrad (28) und die Lagerbrücke (72) enthaltenden Zwischenbereich thermisch von dem den Hubmagneten (12) enthaltenden Bereich getrennt ist.1. Dosing pump with a pump plunger (52 ') connected to an armature (50) of a lifting magnet (12), at one end carrying a piston or acting on a diaphragm (62), with a the armature (50) or a connected one Part in the de-energized state of the magnet coil against a return spring (80) pressing the stop (82) limiting the pump stroke, with an end face having the end face (82) and a fixed magnetic yoke (46) from the outside by turning about a parallel one to the tappet axis Axis adjustable handwheel (80) and with a die (48) Control electronics (22) acting on the magnetic coil with pulsed direct current and located in a housing part arranged outside the area of the lifting magnet (20 '), characterized in that the handwheel (28) is connected to a bearing bridge (28) connected to the magnetic yoke (46). 72) about an axis eccentric to the tappet axis (52) (bearing journal 64) is mounted so that the rod (52) forming the tappet (52 '), with its end opposite the piston or the diaphragm (62), passes through an end to the axis of rotation (bearing journal 64) concentric, circular arc-shaped slot (66) of the handwheel (28) and through a guide bush (68) of the bearing bracket (72) and at the projecting end a support surface (disk 74) for which is also on the outer surface (bottom 76) of the bearing bracket (72) supporting return spring (80) contains that the handwheel (28) in an area around the elongated hole (66) and the bearing bridge in an area around the guide bushing (68) concentrating on each other Isch to the axis of rotation (bearing pin 64) against the stop surface (82) wedge surfaces (96,98) are large against each other, and that the control electronics (22) containing the housing part (20 ') by a handwheel (28) and the bearing bracket (72nd ) containing the intermediate area is thermally separated from the area containing the solenoid (12). 2. Dosierpumpe nach Anspruch 1, dadurch gekennzeichnet , daß der die Steuerungselektronik (22) enthaltende Gehäuseteil (20') durch eine Zwischenwand (18) von einem Gehäuseansatz (20") getrennt ist, der unter Aufnahme des Handrades (28) und der Lagerbrücke (72) an einem das Magnetjoch (46) enthaltenden Jochgehäuse (10,44) befestigbar ist, und daß das Handrad (28) mit einem Umfangsteil durch eine Seitenwandöffnung (104) des Gehäuseansatzes (20") nach außen hindurchgreift.2. Dosing pump according to claim 1, characterized in that the control electronics (22) containing the housing part (20 ') is separated by an intermediate wall (18) from a housing extension (20 ") which accommodates the handwheel (28) and the bearing bracket (72) can be fastened to a yoke housing (10, 44) containing the magnetic yoke (46), and that the handwheel (28) reaches out with a peripheral part through a side wall opening (104) of the housing extension (20 "). 3. Dosierpumpe nach Anspruch 2, dadurch gekennzeichnet , daß das Handrad (28) einen mit einer Rändelung (106) versehenen Umfangsbereich aufweist, und daß am Gehäuseansatz (20") im Bereich der Seitenwandöffnung (104) mindestens eine in die Rändelung (106) einrastende Sperrklinke (108) angeformt ist.3. Dosing pump according to claim 2, characterized in that the handwheel (28) has a knurled (106) circumferential area, and that on the housing extension (20 ") in the region of the side wall opening (104) at least one in the knurled (106) engaging pawl (108) is formed. 4. Dosierpumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Handrad (28) einen im Bereich der Anschlagfläche (82) zum Anker (50) hin offenen, in einem Lagerauge (100) der Lagerbrücke (72) gelagerten Hohlzapfen (64) aufweist, und daß in dem Hohlzapfen (64) eine zwischen Anker (50) und Handrad (28) eingespannte Druckfeder (90) angeordnet ist.4. Dosing pump according to one of claims 1 to 3, characterized in that the handwheel (28) in the area of the stop surface (82) to the armature (50) open, in a bearing eye (100) of the bearing bracket (72) mounted hollow pin ( 64), and that a compression spring (90) clamped between armature (50) and handwheel (28) is arranged in the hollow pin (64). 5. Dosierpumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet , daß die Rückstellfeder (80) mit ihrem einen Ende in eine zur Führungsbüchse (68) konzentrische Ringnut (78) der Lagerbrücke (72) eingreift.5. Dosing pump according to one of claims 1 to 4, characterized in that the return spring (80) engages with one end in a to the guide sleeve (68) concentric annular groove (78) of the bearing bracket (72). 6. Dosierpumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Lagerbrücke (72) eine etwa halbzylindrische, zur Drehachse (64) des Handrades (28) konzentrische, einen Teil des Handradumfangs umfassende randoffene Aussparung aufweist, und daß die Führungsbüchse (68) und das Lagerauge (100) an einem in die Aussparung eingreifenden Ausleger der Lagerbrücke (72) angeordnet ist.6. Dosing pump according to one of claims 1 to 5, characterized in that the bearing bridge (72) has an approximately semi-cylindrical, to the axis of rotation (64) of the handwheel (28) concentric, part of the circumference of the handwheel and has an open edge, and that the guide bush ( 68) and the bearing eye (100) is arranged on an arm of the bearing bracket (72) which engages in the recess. 7. Dosierpumpe nach Anspruch 6, dadurch gekennzeichnet , daß die seitlichen Randflächen des Auslegers Begrenzungsanschläge für das Handrad (28) bilden.7. Dosing pump according to claim 6, characterized in that the lateral edge surfaces of the boom form limit stops for the handwheel (28). 8. Dosierpumpe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die keilförmigen Anlageflächen (96,98)mindestens,eine reibungsverkleinernde Rille aufweisen.8. Dosing pump according to one of claims 1 to 7, characterized in that the wedge-shaped contact surfaces (96,98) at least have a friction-reducing groove. 9. Dosierpumpe nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das Magnetjoch (46) und der Magnetanker (50) nach Art eines Wechselstrommagneten aus je einem durch Nieten zusammengehaltenen Blechpaket bestehen, und daß das Magnetjoch (46) einen mit Kühlrippen versehenen Kühlkörper (10), vorzugsweise aus Aluminium, trägt.9. Dosing pump according to one of claims 1 to 8, characterized in that the magnetic yoke (46) and the magnet armature (50) in the manner of an AC magnet each consist of a laminated core held together by rivets, and that the magnetic yoke (46) is provided with cooling fins Heatsink (10), preferably made of aluminum, carries. 10. Dosierpumpe nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß der Anker (50) an seinen gegen das Magnetjoch (46) anschlagenden Flächen mindestens eine in einer hinterschnittenen Rille (86) angeordnete, über den Rillenrand überstehende, im entspannten Zustand gegenüber dem Rillenquerschnitt etwas Übermaß aufweisende elastische Schnur (88) enthält.10. Dosing pump according to one of claims 1 to 9, characterized in that the armature (50) on its against the magnetic yoke (46) abutting surfaces at least one in an undercut groove (86) arranged, projecting beyond the groove edge, in the relaxed state opposite the groove cross section has somewhat oversized elastic cord (88). 11. Dosierpumpe nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Lagerbrücke (72) als Druckgußteil ausgebildet ist.11. Dosing pump according to one of claims 1 to 10, characterized in that the bearing bridge (72) is designed as a die-cast part. 12. Dosierpumpe nach Anspruch 9, dadurch gekennzeichnet, daß der Kühlkörper (10) ein, auf das Magnetjoch (46) aufgeschrumpftes Aluminium-Druckgußteil ist.12. Metering pump according to claim 9, characterized in that the heat sink (10) is a die-cast aluminum part shrunk onto the magnetic yoke (46).
EP81104718A 1980-07-16 1981-06-19 Electromagnetic metering pump Expired EP0043939B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803026879 DE3026879A1 (en) 1980-07-16 1980-07-16 MAGNETIC DOSING PUMP
DE3026879 1980-07-16

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EP0043939A1 true EP0043939A1 (en) 1982-01-20
EP0043939B1 EP0043939B1 (en) 1984-01-18

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DE (2) DE3026879A1 (en)

Cited By (1)

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EP1085206A1 (en) * 1999-09-13 2001-03-21 Manfred Zucht Oscillating piston pump station

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DE19844163C1 (en) * 1998-09-25 2000-01-05 Ficht Gmbh & Co Kg Dosed pumping method for fuel, lubrication oil, alcohol or water

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CH416330A (en) * 1963-11-28 1966-06-30 Bosch Gmbh Robert Electromagnetically driven fuel feed pump
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US3961860A (en) * 1971-06-15 1976-06-08 Chemie And Filter Gmbh Proportioning pump

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GB677120A (en) * 1949-10-31 1952-08-06 Bosch Gmbh Robert Improvements in variable delivery piston pumps
DE2024582C3 (en) * 1969-05-21 1975-08-07 Snam Progetti S.P.A., Mailand (Italien) Metering pump with variable delivery
DE7119904U (en) * 1971-05-21 1971-09-30 Cillichemie Vogelmann E DIAPHRAGM DOSING PUMP
DE2129588C3 (en) * 1971-06-15 1975-10-30 Chemie Und Filter Gmbh, Verfahrenstechnik Kg, 6900 Heidelberg Dosing pump
DE2139969C3 (en) * 1971-08-10 1974-12-12 Chemie Und Filter Gmbh, Verfahrenstechnik Kg, 6900 Heidelberg Adjustment device for lifting magnets of dosing pumps

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CH416330A (en) * 1963-11-28 1966-06-30 Bosch Gmbh Robert Electromagnetically driven fuel feed pump
DE1273992B (en) * 1965-03-13 1968-07-25 Eberspaecher J Fuel piston pump
US3961860A (en) * 1971-06-15 1976-06-08 Chemie And Filter Gmbh Proportioning pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1085206A1 (en) * 1999-09-13 2001-03-21 Manfred Zucht Oscillating piston pump station

Also Published As

Publication number Publication date
DE3026879A1 (en) 1982-02-04
DE3161953D1 (en) 1984-02-23
EP0043939B1 (en) 1984-01-18

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