EP2918835B2 - Pompe à membrane - Google Patents

Pompe à membrane Download PDF

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Publication number
EP2918835B2
EP2918835B2 EP15151943.6A EP15151943A EP2918835B2 EP 2918835 B2 EP2918835 B2 EP 2918835B2 EP 15151943 A EP15151943 A EP 15151943A EP 2918835 B2 EP2918835 B2 EP 2918835B2
Authority
EP
European Patent Office
Prior art keywords
diaphragm
diaphragm pump
inlet valve
section
outlet valve
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
EP15151943.6A
Other languages
German (de)
English (en)
Other versions
EP2918835B1 (fr
EP2918835A1 (fr
Inventor
Thorsten Burggraf
Jürgen Wissner
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.)
Pfeiffer Vacuum GmbH
Original Assignee
Pfeiffer Vacuum 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=52358666&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2918835(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Pfeiffer Vacuum GmbH filed Critical Pfeiffer Vacuum GmbH
Publication of EP2918835A1 publication Critical patent/EP2918835A1/fr
Application granted granted Critical
Publication of EP2918835B1 publication Critical patent/EP2918835B1/fr
Publication of EP2918835B2 publication Critical patent/EP2918835B2/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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/08—Actuation of distribution members
    • 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
    • F04B43/0018—Special features the periphery of the flexible member being not fixed to the pump-casing, but acting as a valve
    • 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
    • F04B43/028—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms with in- or outlet valve arranged in the plate-like flexible member
    • 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 present invention relates to a diaphragm vacuum pump, with a scoop chamber which can be acted upon by a diaphragm and an inlet valve and an outlet valve via which a medium is sucked into the scoop chamber in a suction phase and is expelled from the scoop chamber in a compression phase, the inlet valve, the outlet valve and the Membrane are integrated in a single connected component,
  • Diaphragm pumps are therefore dry positive displacement pumps.
  • the scoop is acted upon via the membrane in such a way that in a suction phase the medium in question is sucked through the inlet valve into the scoop and in a compression phase is expelled again from the scoop via the outlet valve.
  • a dead volume remains, the content of which is not expelled. During the subsequent suction stroke, this volume expands again and partially fills up the work space, which limits the ultimate pressure that can be achieved.
  • a compression ratio that is higher than the ratio between the maximum working volume and the dead volume cannot be achieved with a positive displacement vacuum pump.
  • the pumping speed of such a diaphragm pump is a function of the size of the pumping chamber, the speed and the dead volume.
  • the previously known diaphragm pumps are clearly inferior to the so-called scroll pumps, which also belong to the type of positive displacement vacuum pumps.
  • the invention is therefore based on the object of specifying an improved diaphragm pump of the type mentioned at the outset, with which a lower final pressure can be achieved with a construction which is kept as simple as possible, the maintenance effort is minimized and the production costs are reduced.
  • the pumping speed of the pump should also be increased.
  • the section comprising the inlet valve and / or the section of the connected component comprising the outlet valve can each be positively controlled via an actuator.
  • the individual connected component can be designed as a membrane as a whole, which comprises a membrane section assigned to the pumping chamber, which corresponds to the membrane of a conventional membrane pump, and a membrane section for each valve, which forms the valve membrane of a membrane valve.
  • the movement of the inlet valve and / or the outlet valve is positively controlled by the drive. This is a particularly effective measure to reduce backflow.
  • the section comprising the inlet valve and / or the section of the connected component comprising the outlet valve can each be positively controlled via an actuator.
  • the delivery rate and the final pressure of the diaphragm pump can be greatly influenced by the type of control, in particular by the selection of control times and / or - if control cams are provided - by the shape of the control cams:
  • the Cross-section of an intake duct can be changed in a targeted manner, which has a direct effect on the pumping speed of the diaphragm pump.
  • At least the section of the connected component comprising the membrane can be acted upon by a crank mechanism.
  • the integration of the inlet valve and the outlet valve in an individual continuous component that also includes the membrane also has the particular advantage that the valve control can be moved into the area of the crank mechanism of the membrane pump, which can simplify the overall structure of the pump.
  • At least one actuator is thus coupled to the crank mechanism of the diaphragm pump or encompassed by it.
  • the crank mechanism of the diaphragm pump comprises a connecting rod which is arranged between an eccentric shaft and a piston element which acts on the connected component.
  • the connecting rod is coupled via a crosshead to the piston element which acts on the connected component.
  • At least one actuator comprises an electrically controllable exciter, for example an electromagnet, a piezo element or the like.
  • the section comprising the inlet valve and / or the section comprising the outlet valve of the individual connected component can be acted upon by the respective actuator against a spring force. After actuation by a respective actuator, the respective valve can then be automatically reset by the spring force.
  • a respective actuator can in particular be controllable without contact, for example via a light barrier, a magnetic coil or the like.
  • Fig. 1 shows a schematic partial representation of an exemplary embodiment of a diaphragm pump 10 according to the invention, which can in particular be a diaphragm vacuum pump.
  • the membrane pump 10 comprises a scoop chamber 14 which can be acted upon by a membrane 12 and an inlet valve 16 and an outlet valve 18, via which a medium 20 is sucked into the scoop chamber 14 in a suction phase and is expelled from the scoop chamber 14 in a compression phase.
  • the inlet valve 16, the outlet valve 18 and the membrane 12 are integrated in a single coherent component 22 in the form of a common membrane.
  • the section comprising the inlet valve 16 and the section of the component 22 comprising the outlet valve 18 are each positively controlled via an actuator 24.
  • At least the section of the component 22 comprising the membrane 12 can be acted upon by a crank mechanism 26.
  • the actuators 24 are coupled to this crank mechanism 26.
  • the actuators 24 each comprise a swivel arm 28 which is rotatably supported at one end about a swivel axis 30 and with its other end on a cam 32 (cf. also Fig. 2 ) of the crank mechanism 26, and a plunger 34 extending in the vertical direction, which can be acted upon by the swivel arm 28 and can be pressed in the vertical direction against the section comprising the inlet valve 16 or the section comprising the individual valve 22 comprising the outlet valve 18.
  • both the section comprising the inlet valve 16 and the section of the component 22 comprising the outlet valve 18 can each be acted upon by the respective actuator 24 against the force of a compression spring 36. After actuation of the intake valve 16 or exhaust valve 18 by the relevant actuator 24, this valve is reset by the associated compression spring 36.
  • the crank mechanism 26 comprises a connecting rod 38 which is arranged between an eccentric shaft 40 and a piston element 42 which acts on the individual connected component 22.
  • the common membrane 22 is clamped between a head cover 44 and the housing 46 of the membrane pump 10.
  • Fig. 2 shows a schematic side view of the connecting rod 38 ( Fig. 1 ) coupled eccentric shaft 40 and the cams 32 of the crank mechanism 26, which are arranged and designed with respect to the eccentric shaft 40 in such a way that the valves 16, 18 are controlled in accordance with the pumping rhythm controlled by the movement of the connecting rod 38 and thus by the rotating eccentric shaft 40 will.
  • Fig. 3 is a top view of the component 22 of the diaphragm pump 10 which comprises the inlet valve 16, the outlet valve 18 and the diaphragm 12. How Fig. 3 shows, the component 22 in the region of the valves 16, 18 each comprises a corresponding sealing surface.
  • Fig. 4 shows a schematic partial representation of a further exemplary embodiment of a diaphragm pump 10 according to the invention, which differs from that in FIG the Fig. 1 reproduced embodiment essentially differs in that a respective actuator 24 in the present case comprises a two-armed lever rotatably mounted about an axis 48.
  • the lever abuts the eccentric shaft 40 of the crank mechanism 26 with a generally vertically extending portion 24 'and is provided with a generally vertically upwardly extending extension 24 "' at the free end of a generally horizontally extending portion 24".
  • the inlet valve 16 or the outlet valve 18 can be acted upon accordingly via the attachment 24 ′ ′′.
  • this diaphragm pump 10 has at least essentially the same structure as that of FIG Fig. 1 , corresponding parts being assigned the same reference numerals.
  • the connecting rod 38 (cf. Fig. 1 ) of the crank mechanism 26 of a respective diaphragm pump 10 is via a crosshead 50 (cf. Fig. 6 ) coupled to the piston element 42 acting on the component 22.
  • Fig. 5 shows a schematic representation of a piston drive without a crosshead.
  • the connecting rod 38 is connected directly to the piston element 42 via a piston pin 52.
  • FIG. 6 an exemplary embodiment of a piston drive with crosshead 50 is shown in a schematic representation.
  • the connecting rod 38 is coupled via a crosshead 50 to the piston element 42 which acts on the individual connected component 22.
  • the piston rod 54 is rigidly connected to the bottom of the piston element 42 and a pivot bearing 56 of the crosshead 50.
  • the pivot bearing 56 is arranged on a sliding shoe 58 of the crosshead, which is displaceable along a sliding bearing wall 60. In such a crosshead arrangement, the piston element 42 is kept free from transverse forces.
  • the actuators 24 can also each comprise an electromagnet, a piezo element or another electrically controllable exciter.
  • a respective actuator 24 can be controlled, for example, via a light barrier, a magnetic coil or in some other way without contact, in particular by a crank mechanism.

Landscapes

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

Claims (7)

  1. Pompe à vide à membrane (10) comportant une chambre d'aspiration (14) susceptible d'être sollicitée via une membrane (12), et une soupape d'entrée (16) ainsi qu'une soupape de sortie (18), par lesquelles un fluide (20) est aspiré dans la chambre d'aspiration (14) pendant une phase d'aspiration et il est éjecté hors de la chambre d'aspiration (14) pendant une phase de compression, la soupape d'entrée (16), la soupape de sortie (18) et la membrane (12) étant intégrées dans un unique composant cohérent (22),
    caractérisée en ce qu'une commande de la soupape d'entrée (16) et/ou de la soupape de sortie (18) est dérivée d'un entraînement (26) de la membrane (12), au moins la portion comprenant la membrane (12) de l'unique composant cohérent (22) est susceptible d'être sollicitée par un entraînement à manivelle (26) l'entraînement à manivelle (26) comprend une bielle (38) qui est agencée entre un arbre excentrique (40) et un élément formant piston (42) sollicitant l'unique composant cohérent (22), et la bielle (38) est couplée à l'élément formant piston (42) sollicitant l'unique composant cohérent (22), au moyen d'une tête en croix (50).
  2. Pompe à vide à membrane selon la revendication 1,
    caractérisée en ce que
    le mouvement de la soupape d'entrée (16) et/ou de la soupape de sortie (18) est commandé à force par l'entraînement (26).
  3. Pompe à vide à membrane selon la revendication 1 ou 2,
    caractérisée en ce que
    la portion comprenant la soupape d'entrée (16) et/ou la portion comprenant la soupape de sortie (18) de l'unique composant cohérent (22) est commandée à force par un actionneur respectif (24).
  4. Pompe à vide à membrane selon la revendication 1,
    caractérisée en ce que
    au moins un actionneur (24) est couplé à l'entraînement à manivelle (26) ou à l'entraînement linéaire, ou bien il est inclus dans celui-ci.
  5. Pompe à vide à membrane selon la revendication 3 ou 4,
    caractérisée en ce que
    au moins un actionneur (24) comprend un excitateur pilotable par voie électrique, en particulier un électroaimant ou un élément piézoélectrique.
  6. Pompe à vide à membrane selon l'une des revendications précédentes,
    caractérisée en ce que
    la portion comprenant la soupape d'entrée (16) et/ou la portion comprenant la soupape de sortie (18) de l'unique composant cohérent (22) est susceptible d'être sollicitée par l'actionneur respectif (24) à l'encontre d'une force élastique.
  7. Pompe à vide à membrane selon l'une des revendications 3 à 6,
    caractérisée en ce que
    un actionneur respectif (24) est pilotable sans contact physique, en particulier par une barrière lumineuse ou par une bobine magnétique.
EP15151943.6A 2014-03-13 2015-01-21 Pompe à membrane Active EP2918835B2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014103459.7A DE102014103459A1 (de) 2014-03-13 2014-03-13 Membranpumpe

Publications (3)

Publication Number Publication Date
EP2918835A1 EP2918835A1 (fr) 2015-09-16
EP2918835B1 EP2918835B1 (fr) 2017-03-29
EP2918835B2 true EP2918835B2 (fr) 2020-04-29

Family

ID=52358666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15151943.6A Active EP2918835B2 (fr) 2014-03-13 2015-01-21 Pompe à membrane

Country Status (2)

Country Link
EP (1) EP2918835B2 (fr)
DE (1) DE102014103459A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112811519B (zh) * 2021-01-06 2022-07-01 杭州电子科技大学 一种净水器水处理增压泵能量回收系统
DE102021204407A1 (de) 2021-05-03 2022-11-03 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Betreiben einer Pumpe und Fluid-Versorgungssystem

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE809457C (de) * 1947-03-12 1951-07-30 Marcel Rene Armand Chabay Kolbenverdichter
US2785638A (en) * 1954-04-08 1957-03-19 Clifford B Moller Force pump for slurries
US4411603A (en) * 1981-06-24 1983-10-25 Cordis Dow Corp. Diaphragm type blood pump for medical use
DE29723455U1 (de) 1997-12-10 1998-09-17 ASF THOMAS Industries GmbH, 82178 Puchheim Membrane für Membranpumpe
IL154779A0 (en) * 2000-09-14 2003-10-31 Jan W Beenker Method and device for conveying media
DE202010002145U1 (de) * 2010-02-09 2011-09-07 Vacuubrand Gmbh + Co Kg Membranvakuumpumpe
DE102010019057A1 (de) * 2010-05-03 2011-11-03 Wmf Württembergische Metallwarenfabrik Ag Fluidpumpe

Also Published As

Publication number Publication date
DE102014103459A1 (de) 2015-09-17
EP2918835B1 (fr) 2017-03-29
EP2918835A1 (fr) 2015-09-16

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