EP2342460B1 - Pompe a membrane avec un carter de pompe composé - Google Patents

Pompe a membrane avec un carter de pompe composé Download PDF

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Publication number
EP2342460B1
EP2342460B1 EP09782802A EP09782802A EP2342460B1 EP 2342460 B1 EP2342460 B1 EP 2342460B1 EP 09782802 A EP09782802 A EP 09782802A EP 09782802 A EP09782802 A EP 09782802A EP 2342460 B1 EP2342460 B1 EP 2342460B1
Authority
EP
European Patent Office
Prior art keywords
casing
housing
pot
valve
diaphragm
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.)
Active
Application number
EP09782802A
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German (de)
English (en)
Other versions
EP2342460A1 (fr
Inventor
Markus Ulrich
Michael Krause
Rainer Haeberer
Matthias Horn
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2342460A1 publication Critical patent/EP2342460A1/fr
Application granted granted Critical
Publication of EP2342460B1 publication Critical patent/EP2342460B1/fr
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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
    • 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
    • F04B43/06—Pumps having fluid drive
    • F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
    • F04B43/0733—Pumps having fluid drive the actuating fluid being controlled by at least one valve with fluid-actuated pump inlet or outlet valves; with two or more pumping chambers in series
    • 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
    • F04B43/0009—Special features
    • 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
    • F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms

Definitions

  • the invention relates to a diaphragm pump having a multi-part pump housing, a suction valve, a pressure valve and at least one working diaphragm, wherein the pump housing has a base housing with suction channel and pressure channel, an intermediate housing and a cover housing, wherein between working housing and cover housing the working diaphragm is clamped.
  • Diaphragm pumps with multi-part pump housings are known in the art, such as. B. DE 10316395 or US 2006 0198740 the latter being the closest state of the art.
  • SCR selective-catalytic exhaust gas treatment systems
  • Such diaphragm pumps have a working diaphragm which, for example, consists of an elastomer material which is actuated axially by an electric motor via an eccentric and a connecting rod.
  • the pump also has a suction channel and a pressure channel, which can be closed by pressure and suction valve, depending on the respective working stroke / lifting state of the working diaphragm, which open and close on opposite sides of a working space against a stop.
  • Such pumps have a multi-part pump housing, wherein the individual housing parts of the pump housing are arranged axially above one another and sealed from each other. The substantially plate-shaped extended housing parts are clamped together axially, usually over several screws. Upper and lower part of the housing are in this case usually made of a metal, so that the axially applied Abdicht theory can be applied to the housing parts distortion-free and without affecting the dimensional stability setting phenomena on the housing parts.
  • Such diaphragm pumps are relatively expensive to manufacture and unfavorable Operating conditions are not very robust. In particular, their tightness or their strength can suffer over their lifetime under unfavorable conditions of use.
  • the object of the invention is to provide a generic diaphragm pump with a multi-part pump housing, which can be manufactured inexpensively and which has a significantly improved long-term tightness and strength and overall increased service life due to their structural nature.
  • a diaphragm pump with a multi-part pump housing a suction valve, a pressure valve and at least one working diaphragm
  • the pump housing has a base housing with suction channel and pressure channel, an intermediate housing and a cover housing, and wherein the working diaphragm is clamped between the intermediate housing and the cover housing.
  • the cover housing is supported on the base housing and that the base housing urges the intermediate housing against at least one valve plate of suction valve and / or pressure valve.
  • the valve plate is thus held so that it is clamped between the base housing and intermediate housing. In this way, it causes a seal of the hydraulic path.
  • the valve plate is therefore held between the base housing and the intermediate housing.
  • valve plate is supported on its base housing on its side opposite the intermediate housing.
  • the basic housing is designed as a pot housing. It therefore essentially has a pot shape, with side walls surrounding an inner.
  • the cover housing is partially inserted into the interior of the pot housing.
  • the cover housing is therefore placed essentially on the pot housing and in this case partially inserted into the interior of the pot housing.
  • a seal between the cover housing and pot housing may be provided for better sealing, or for example a laser welding, which connects the two parts together.
  • the laser welding connects a plugged into the pot housing cover outer wall outer peripheral side with an inner side of the side wall of the pot housing on the inner peripheral side.
  • the cover housing has an interior space for at least partially receiving the intermediate housing.
  • the intermediate housing in turn is in turn at least partially received by an interior of the cover housing, so in particular axially inserted into the same.
  • the cover housing therefore has the inner space designed as an inner pot for at least partially receiving the intermediate housing.
  • the working diaphragm is fixed between the cover housing and the intermediate housing, for example held by clamping action.
  • the introduced into the inner pot intermediate housing thus clamps the working diaphragm against the cover housing, wherein in or on the inner pot a corresponding receptacle is provided and the intermediate housing has a working space for the lifting movement of the working diaphragm.
  • the invention provides that the pot openings are directed by the pot housing and the inner pot against each other.
  • the intermediate housing can be very well absorbed between the pot housing and inner pot and hold both radially and axially. Also can be advantageously reduce the height of the diaphragm pump and achieve a better space utilization, which is particularly advantageous for small vehicles and vehicles that provide only little space available due to their structural conditions.
  • valve plate of the suction valve and the pressure valve is a common, one-piece valve plate. This makes it possible to arrange the suction valve and pressure valve by means of one and the same valve plate in the installed position. The known from the prior art problems that valves on different housing parts opposite each other and can fall out during assembly, is advantageously avoided in this way.
  • the areas associated with the suction valve and the pressure valve areas of the valve plate - in the relaxed state - are arranged lying in the same plane.
  • the valve plate which consists for example of an elastomeric material
  • the areas are in the same plane, the valve working space of each valve is formed by corresponding recesses of the base housing and intermediate housing.
  • the diaphragm pump is a reducing agent pump for an exhaust system of a motor vehicle.
  • Ad Blue and related reducing agents can be promoted advantageously and reliably with a diaphragm pump designed in this way.
  • FIG. 1 shows a diaphragm pump 1 with a housing 2, which consists of three housing parts 3, namely a base housing 4, a cover housing. 5 and an intermediate housing 6.
  • the base housing 4 is in this case formed as a pot housing 7, with an interior 8, in which the cover housing 5 is inserted sealingly with a cover housing side wall 9, wherein the cover housing side wall 9 is inserted sealingly, wherein the cover housing side wall 9 to a Side wall 10 of the pot housing 7 applies.
  • the lid housing 5 in turn, has an inner pot 34 as an inner pot 11, so is itself pot-shaped, with pot openings 12 of the lid housing 5 and pot housing 7 (namely, basic housing 4) against each other.
  • the intermediate housing 6 is introduced, such that a working space 13 is formed for a working diaphragm 14 of the diaphragm pump 1 between the cover housing 5 and the intermediate housing 6.
  • the working diaphragm 14 is acted upon by clamping of the cover housing 5 and the intermediate housing 6 and moved by an eccentric connecting rod 15 attached to the upper side of the working diaphragm 14.
  • the intermediate housing 6 has channels 16 which are opened or closed by valves 17, namely a suction valve 18 and a pressure valve 19, depending on the working cycle of the diaphragm pump 1 (the working diaphragm 14).
  • valves 17 are arranged on a valve plate 20, which has between the valves 17 highly flexible connecting webs 21 and circumferentially a support structure 22 which is formed as a sealing element 23.
  • the sealing element 23 of the valve plate 20 seals the intermediate housing 12 on the underside of the base housing 4.
  • the valves 17 exhibiting pump chamber 24 is sealed to the environment, so that it opens only via valve paths and the channels 16 and a suction channel 25 and a pressure channel 26. Both suction channel 25 and pressure channel 26 are formed in the base housing 4, namely in a bottom 27 of the pot housing 7.
  • Suction channel 25 and pressure channel 26 open into the pump chamber 24 and there, depending on the working cycle of the working diaphragm 14, opened by the corresponding pressure conditions or closed, which is made possible by the elastic connecting webs 21 which hold the valves 17 in the valve plate 20.
  • suction and pressure channel 25, 26 are placed in the stable structure of the bottom 27 of the base housing 4, and side walls 10 of the base housing 4 to the cover housing 5 surrounds all other housing parts 3, namely the majority of the Cover housing 5 itself and the intermediate housing 6, which is completely enclosed between the cover housing 5 and the base housing 4.
  • a substantially radial support of the housing against each other which is for example in the region of a side wall 10 of the base housing 4 inside with the adjoining cover housing by a weld 28 (preferably generated by laser welding) effectively and reliably sealed.
  • a weld 28 preferably generated by laser welding
  • no axial bracing is required any longer, so that no undesired setting behavior of the housing parts 3 occurs.
  • a vibration diaphragm 29 is still provided in the region of the suction channel 25, which favors the opening and closing of the valves 17.
  • the vibration diaphragm 29 closes towards the environment an oscillating space 30 which is associated with the suction channel 25 and downstream of the suction valve 18 is closed.
  • the vibration diaphragm 29 is clamped between the base 27 of the base housing 4 and the environment by a base plate 32 provided with an opening 31 located in the region of the vibration diaphragm 29.
  • the vibrating diaphragm 29 is in this case designed to be self-sealing, such that it seals against the bottom 27 when it is subjected to clamping by the bottom plate 32.
  • the bottom plate 32 is welded to the bottom 27 by a weld 28, which in turn is preferably produced by laser welding.
  • FIG. 2 shows the valve plate 20 which is integrally formed and the circumferential support structure 22 as a sealing element 23 between the in FIG. 1 shown basic housing 4 and intermediate housing 6 for axial sealing in clamping application of the valve plate 20 forms.
  • the valve plate 20 has, held by connecting webs 21, the valves 17, wherein particularly preferably the valves 17 may be integrally formed with the valve plate 20, in particular also consist of the same material, for example of a highly elastic elastomer material.
  • the valve plate 20 in this case has a cross-sectional configuration 33, which allows easy insertion during assembly of the diaphragm pump 1 shown in FIG. A common in the art falling out of overhead or mutually acted upon arranged valves 17 is not possible in this embodiment.
  • the diaphragm pump 1 is, as in FIG.
  • valve plate 20 and the vibration diaphragm 29 inserted into the recesses provided in each case and acted upon clamping by the housing parts 3 and the bottom plate 32 and held so.
  • This illustrated diaphragm pump 1 is permanently reliable and inexpensive to produce in a very simple manner, especially since prefabricated modules such as the integrally formed valve plate 20 can be used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Claims (4)

  1. Pompe à membrane comprenant un carter de pompe en plusieurs parties, une soupape d'aspiration, une soupape de pression, et au moins une membrane de travail, le carter de pompe présentant un carter de base avec un canal d'aspiration et un canal de pression, un carter intermédiaire et un carter couvercle, entre le carter intermédiaire et le carter couvercle étant serrée la membrane de travail, caractérisée en ce que le carter couvercle (5) s'appuie sur le carter de base (4) et en ce que le carter de base (4) pousse le carter intermédiaire (6) contre au moins un plateau de soupape (20) de la soupape d'aspiration (18) et/ou de la soupape de pression (19), le plateau de soupape (20) s'appuyant sur son côté opposé au carter intermédiaire (6) sur le carter de base (4), le carter de base (4) étant réalisé sous forme de carter pot (7), le carter couvercle (5) étant enfoncé en partie à l'intérieur du carter pot (7), le carter couvercle (5) présentant un espace interne (34) pour recevoir au moins en partie le carter intermédiaire (6), l'espace interne (34) étant formé par un pot interne (11) et les ouvertures de pot (12) étant orientées l'une vers l'autre depuis le carter pot (7) et le pot interne (11).
  2. Pompe à membrane selon la revendication précédente, caractérisée en ce que l'au moins un plateau de soupape (20) de la soupape d'aspiration (18) et/ou de la soupape de pression (19) est un plateau de soupape commun d'une seule pièce (20).
  3. Pompe à membrane selon l'une quelconque des revendications précédentes, caractérisée en ce que les régions de l'au moins un plateau de soupape (20) associées à la soupape d'aspiration (18) et à la soupape de pression (19) se situent dans l'état détendu dans le même plan.
  4. Pompe à membrane selon l'une quelconque des revendications précédentes, caractérisée en ce que la pompe à membrane (1) est une pompe à agent réducteur pour un système de gaz d'échappement d'un véhicule automobile.
EP09782802A 2008-10-30 2009-09-09 Pompe a membrane avec un carter de pompe composé Active EP2342460B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008043309A DE102008043309A1 (de) 2008-10-30 2008-10-30 Membranpumpe mit einem mehrteiligen Pumpengehäuse
PCT/EP2009/061672 WO2010049199A1 (fr) 2008-10-30 2009-09-09 Pompe à membrane doté d'un carter de pompe en plusieurs parties

Publications (2)

Publication Number Publication Date
EP2342460A1 EP2342460A1 (fr) 2011-07-13
EP2342460B1 true EP2342460B1 (fr) 2013-01-30

Family

ID=41343944

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09782802A Active EP2342460B1 (fr) 2008-10-30 2009-09-09 Pompe a membrane avec un carter de pompe composé

Country Status (3)

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EP (1) EP2342460B1 (fr)
DE (1) DE102008043309A1 (fr)
WO (1) WO2010049199A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011003461A1 (de) 2011-02-01 2012-08-02 Robert Bosch Gmbh Membranpumpe sowie Abgasnachbehandlungssystem mit einer Membranpumpe
DE102011075422A1 (de) 2011-05-06 2012-11-08 Robert Bosch Gmbh Integralfördermodul zur Versorgung eines Abgasnachbehandlungssystems einer Brennkraftmaschine mit einem Reduktionsmittel
DE102011089516B4 (de) 2011-12-22 2021-08-12 Robert Bosch Gmbh Pumpe zum Rücksaugen für ein flüssiges Abgasnachbehandlungsmittel, Dosieranordnung und Verfahren zum Dosieren und Rücksaugen
DE102011089509A1 (de) 2011-12-22 2013-06-27 Robert Bosch Gmbh Fördereinrichtung und Dosieranordnung
DE102012221492B4 (de) 2012-11-23 2021-12-30 Robert Bosch Gmbh Membranpumpe mit Exzenterantrieb und integriertem Absperrventil
DE102017209569A1 (de) * 2017-06-07 2018-12-13 Robert Bosch Gmbh Mehrteiliges Gehäuse für eine Membranpumpe, Membranpumpe, Abgasnachbehandlungssystem
CN111608772B (zh) * 2019-02-25 2024-03-22 西安秦泰汽车排放技术有限公司 一种尿素输送回抽泵芯、装置及scr系统
DE102020112696B4 (de) 2020-05-11 2022-08-18 Knf Flodos Ag Ventil sowie Membranpumpe mit Ein- und Auslassventilen
CN111927749B (zh) * 2020-07-14 2021-08-10 西安交通大学 一种隔膜压缩机气压无损监测系统及方法
DE102021105373A1 (de) 2021-03-05 2022-09-08 Mann+Hummel Gmbh Filterelement, Filterelementanordnung und Filtersystem mit einer Filterelementanordnung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10316395B4 (de) * 2003-04-10 2008-04-17 Jähn, Peter Membranpumpe
JP2006242007A (ja) * 2005-03-01 2006-09-14 Toyota Industries Corp ダイアフラムポンプ

Also Published As

Publication number Publication date
DE102008043309A1 (de) 2010-05-06
WO2010049199A1 (fr) 2010-05-06
EP2342460A1 (fr) 2011-07-13

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