EP0043939B1 - Pompe doseuse électromagnétique - Google Patents

Pompe doseuse électromagnétique Download PDF

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Publication number
EP0043939B1
EP0043939B1 EP81104718A EP81104718A EP0043939B1 EP 0043939 B1 EP0043939 B1 EP 0043939B1 EP 81104718 A EP81104718 A EP 81104718A EP 81104718 A EP81104718 A EP 81104718A EP 0043939 B1 EP0043939 B1 EP 0043939B1
Authority
EP
European Patent Office
Prior art keywords
handwheel
metering pump
magnet
pump according
bearing support
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.)
Expired
Application number
EP81104718A
Other languages
German (de)
English (en)
Other versions
EP0043939A1 (fr
Inventor
Rudi Siller
Hermann Steil
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.)
Cillichemie Ernst Vogelmann GmbH and Co
Original Assignee
Cillichemie Ernst Vogelmann GmbH and Co
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 Cillichemie Ernst Vogelmann GmbH and Co filed Critical Cillichemie Ernst Vogelmann GmbH and Co
Publication of EP0043939A1 publication Critical patent/EP0043939A1/fr
Application granted granted Critical
Publication of EP0043939B1 publication Critical patent/EP0043939B1/fr
Expired legal-status Critical Current

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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

Definitions

  • the invention relates to a magnetic metering pump of the type given in the preamble of the claim. 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-U 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 inside the fixed 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. to be able to support 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. This favors the heat dissipation from the magnet, which heats up strongly during operation, 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. Due to the special arrangement of the stroke adjustment mechanism in an intermediate area between the lifting magnet and the control electronics, a good thermal separation between these parts is ensured, which prevents undesired heating of the electronic components.
  • the latter can be further improved in that the magnet yoke and the magnet armature, in spite of pulsed direct current operation in the manner of an alternating current magnet, each consist of a laminated core held together by rivets, and that the magnet yoke carries a cooling body provided with cooling fins on its outer surface.
  • the solenoid metering pump comprises 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 lifting 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 frequency is automatically controlled via the control electronics in accordance with the signals emitted by a water meter, so that a frequency setting from the outside is unnecessary and the rotary knob 26 is therefore omitted.
  • a pushbutton switch is provided in this case, with which a pumping process can be triggered manually for test purposes.
  • the magnetic metering pump is fastened to the wall via a fastening bracket 36, which is attached to the ribs 40 of the heat sink 10 using suitable bracket shoes 38 made of a vibration-damping rubber-elastic material can be clamped and locked with the help of a wire clip 42 against accidental sliding out backwards on the heat sink.
  • 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 attached to the magnet yoke with the aid of a casting resin, and a T-shaped magnet 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 are made in the manner of an AC magnet, each from a laminated core held together with rivets. For larger quantities in particular, it may be advantageous for reasons of cost to produce the yoke and the armature from an extruded or a sintered magnetizable material.
  • 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 protruding end of the rod forming 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 back of the pump membrane 62 clamped between the rigid parts 58, 60.
  • the rod 52 extends through and carries 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 which is rigidly connected to the yoke housing with the aid of the screws 70 and is designed as a die-cast part at its front end a radially projecting metal disk 74.
  • a return spring 80 designed as a compression spring is clamped, which presses the armature 50 against the stop surface 82 on the handwheel 28 when the magnet coil 48 is de-energized 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 stop surface 96 on the handwheel is reduced by a circumferential groove 102.
  • the two pawls 108 formed in the area of a side wall opening 104 of the housing extension 20 "and which snap into a peripheral knurling 106 of the handwheel 28 ensure that a stroke setting which has been adjusted once cannot change accidentally or automatically.

Landscapes

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

Claims (12)

1. Pompe de dosage comportant un poussoir de pompe (52') relié à une armature (50) d'un électroaimant d'actionnement (12), portant un piston à une de ses extrémités ou bien agissant sur une membrane (62), un ressort de rappel (80) poussant l'armature (50), ou bien une partie reliée à celle-ci, dans la condition de désexcitation de la bobine de l'électroaimant, contre une butée (82) limitant la course de pompage, un volant (28) comportant une surface frontale formant la butée (82), déplaçable de l'extérieur par rapport à une culasse magnétique fixe (46) par rotation autour d'un axe orienté parallèlement à l'axe du poussoir, ainsi qu'un circuit électronique de commande (22) assurant l'excitation de la bobine (48) avec un courant continu pulsé et disposé dans une partie de carter (20') qui est placée à l'extérieur de la zone de l'électroaimant, caractérisée en ce que le volant (28) est monté à rotation sur un corps de palier (72) relié à la culasse d'électro-aimant (46) de façon à pouvoir tourner autour d'un axe (tourillon de palier 64) excentré par rapport à l'axe de poussoir (52), et comporte une sécurité (moletage 196, cliquet de verrouillage 108) empêchant une rotation non intentionnelle, en ce que la tige (52) formant le poussoir de pompe (52') est engagée, par son extrémité placée en regard du piston ou de la membrane (62) dans un trou oblong (66) du volant (28) qui a la forme d'un arc de cercle et qui est concentrique à l'axe de rotation (tourillon de palier 64), ainsi que dans un manchon de guidage (68) du corps de palier (72) et comporte, à l'extrémité opposée, une surface d'appui (disque 74) pour le ressort de rappel (80) s'appuyant en outre contre la surface extérieure (fond 76) du corps de palier (72), en ce que le volant (28), dans une zone entourant le trou oblong (66), et le corps de palier (72), dans une zone entourant le manchon de guidage (68), s'appliquent l'un contre l'autre, sur une grande étendue, par des surfaces en forme de coins (96, 98) se correspondant mutuellement et disposées concentriquement à l'axe de rotation (tourillon de palier 64) par rapport à la surface de butée (82), et en ce que la partie de carter (20') contenant le circuit électronique de commande (22) est séparée thermiquement de la zone contenant l'électro-aimant d'actionnement (12) par une zone intermédiaire contenant le volant (28) et le corps de palier (72).
2. Pompe de dosage selon la revendication 1, caractérisée en ce que la partie de carter (20') contenant le circuit électronique de commande (22) est séparée par une paroi intermédiaire (18) d'un appendice de carter (20") qui peut être fixé, en recevant le volant (28) et le corps de palier (72), contre un boîtier (10, 44) contenant la culasse magnétique (46) et en ce que le volant (28) traverse par une partie de sa périphérie une ouverture de paroi latérale (104) de l'appendice de carter (20") de façon à dépasser à l'extérieur.
3. Pompe de dosage selon la revendication 2, caractérisée en ce que le volant (28) comporte, en vue d'empêcher une rotation non intentionnelle, une zone périphérique pourvue d'un moletage (106) et en ce qu'au moins un cliquet de verrouillage (108) destiné à s'accrocher dans le moletage (106) est formé sur l'appendice de carter (20") dans la zone de l'ouverture de paroi latérale (104).
4. Pompe de dosage selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le volant (28) comporte un tourillon creux (64), ouvert en direction de l'armature (50) dans la direction de la surface de butée (82) et monté dans un logement (100) du coussinet de palier (72) et en ce qu'il est prévu dans le tourillon creux (64) un ressort de compression (90) monté entre l'armature (50) et le volant (28).
5. Pompe de dosage selon l'une quelconque des revendications 1 à 4, caractérisée en ce que le ressort de rappel (80) s'accroche par une de ses extrémités dans une rainure annulaire (78) du corps de palier (72) qui est concentrique au manchon de guidage (68).
6. Pompe de dosage selon l'une quelconque des revendications 1 à 5, caractérisée en ce que le corps de palier (72) comporte un évidement ouvert sur le bord, de forme à peu près demi- cylindrique, entourant une partie de la périphérie du volant et concentrique à l'axe de rotation (64) dudit volant (28) et en ce que le manchon de guidage (68) et le logement de palier (100) sont disposés sur un embout du corps de palier (72) s'accrochant dans l'évidement.
7. Pompe de dosage selon la revendication 6, caractérisée en ce que les surfaces latérales de bord de l'embout constituent des butées de limitation du volant (28).
8. Pompe de dosage selon l'une quelconque des revendications 1 à 7, caractérisée en ce que les surfaces d'appui en forme de coins (96, 98) comportent au moins une rainure de réduction de frottement.
9. Pompe de dosage selon l'une quelconque des revendications 1 à 8, caractérisée en ce que la culasse magnétique (46) et l'armature d'électro-aimant (50) se composent, à la façon d'un électro-aimant à courant alternatif, chacune d'un paquet de tôles maintenues assemblées par des rivets et en ce que la culasse magnétique (46) comporte un corps de refroidissement (10), de préférence en aluminium, qui est pourvu de nervures de refroidissement.
10. Pompe de dosage selon l'une quelconque des revendications 1 à 9, caractérisée en ce que l'armature (50) comporte, sur ses surfaces venant buter contre la culasse magnétique (46), au moins un cordon élastique (88) disposé dans une rainure dépouillée (86), dépassant du bord de la rainure et présentant dans la condition détendue une cote légèrement supérieure à la section droite de rainure.
11. Pompe de dosage selon l'une quelconque des revendications 1 à 10, caractérisée en ce que le corps de palier (72) se présente sous la forme d'une pièce moulée sous pression.
12. Pompe de dosage selon la revendication 9, caractérisée en ce que le corps de refroidissement (10) est une pièce en aluminium moulée sous pression et rétreinte sur la culasse magnétique (46).
EP81104718A 1980-07-16 1981-06-19 Pompe doseuse électromagnétique Expired EP0043939B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803026879 DE3026879A1 (de) 1980-07-16 1980-07-16 Magnetdosierpumpe
DE3026879 1980-07-16

Publications (2)

Publication Number Publication Date
EP0043939A1 EP0043939A1 (fr) 1982-01-20
EP0043939B1 true EP0043939B1 (fr) 1984-01-18

Family

ID=6107302

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81104718A Expired EP0043939B1 (fr) 1980-07-16 1981-06-19 Pompe doseuse électromagnétique

Country Status (2)

Country Link
EP (1) EP0043939B1 (fr)
DE (2) DE3026879A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19844163C1 (de) * 1998-09-25 2000-01-05 Ficht Gmbh & Co Kg Pumpverfahren und Pumpvorrichtung
EP1085206A1 (fr) * 1999-09-13 2001-03-21 Manfred Zucht Station de pompage avec pompe à piston oscillant

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB677120A (en) * 1949-10-31 1952-08-06 Bosch Gmbh Robert Improvements in variable delivery piston pumps
DE1453449C3 (de) * 1963-11-28 1974-08-08 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch angetriebene Kraftstoff-Förderpumpe
DE1273992B (de) * 1965-03-13 1968-07-25 Eberspaecher J Brennstoffkolbenpumpe
NL7007263A (fr) * 1969-05-21 1970-11-24
DE7119904U (de) * 1971-05-21 1971-09-30 Cillichemie Vogelmann E Membran- dosierpumpe
DE2129588C3 (de) * 1971-06-15 1975-10-30 Chemie Und Filter Gmbh, Verfahrenstechnik Kg, 6900 Heidelberg Dosierpumpe
US3961860A (en) * 1971-06-15 1976-06-08 Chemie And Filter Gmbh Proportioning pump
DE2139969C3 (de) * 1971-08-10 1974-12-12 Chemie Und Filter Gmbh, Verfahrenstechnik Kg, 6900 Heidelberg Einstellvorrichtung für Hubmagnete von Dosierpumpen

Also Published As

Publication number Publication date
DE3026879A1 (de) 1982-02-04
EP0043939A1 (fr) 1982-01-20
DE3161953D1 (en) 1984-02-23

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