EP1525399A1 - Pompe a diaphragme - Google Patents

Pompe a diaphragme

Info

Publication number
EP1525399A1
EP1525399A1 EP04714736A EP04714736A EP1525399A1 EP 1525399 A1 EP1525399 A1 EP 1525399A1 EP 04714736 A EP04714736 A EP 04714736A EP 04714736 A EP04714736 A EP 04714736A EP 1525399 A1 EP1525399 A1 EP 1525399A1
Authority
EP
European Patent Office
Prior art keywords
diaphragm
working
chamber wall
pump
membrane
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
EP04714736A
Other languages
German (de)
English (en)
Other versions
EP1525399B1 (fr
Inventor
Erich Becker
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.)
KNF Neuberger GmbH
Original Assignee
KNF Neuberger GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KNF Neuberger GmbH filed Critical KNF Neuberger GmbH
Publication of EP1525399A1 publication Critical patent/EP1525399A1/fr
Application granted granted Critical
Publication of EP1525399B1 publication Critical patent/EP1525399B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members

Definitions

  • the invention relates to a diaphragm pump with an oscillating during the pumping movements between a lower and a top dead center working diaphragm, which defines a pump space between itself and a preferably concavely curved pump chamber wall, wherein the working diaphragm rests at top dead center on the pump chamber wall.
  • Diaphragm pumps of the type mentioned are already known in various designs. If such diaphragm pumps are operated in the deeper vacuum range, there is a risk that the working diaphragm will bulge due to the differential pressure load occurring between the upper and lower diaphragm sides and in this way reduce the pumping chamber volume. Especially in this deeper vacuum area, large pressure differences occur between the upper and lower sides of the membrane. While the membrane underside generally bears the atmospheric pressure, the respective evacuation pressure acts on the upper side of the membrane, the maximum pressure difference resulting from the atmospheric pressure minus the end pressure of the diaphragm pump.
  • the solution to this problem in the diaphragm pump of the type mentioned in particular consists in that the working diaphragm has an inner and an outer annular zone, which are deformable during the pumping movements, and that between these annular zones a stiffened and during the pumping movements substantially non-deformable diaphragm is richly arranged.
  • the diaphragm pump according to the invention has a working diaphragm which has an inner and an outer annular zone, wherein between these annular zones a stiffened and during the pumping movements non-deformable diaphragm region is arranged.
  • the stiffening of the membrane in its non-deformable membrane area is such that the working membrane Nevertheless, at the top dead center, it rests unhindered against the preferably concavely curved pump chamber wall.
  • the stiffening of the membrane in the deformable membrane region bounded by the inner annular zone and the outer annular zone can be effected, for example, by a stiffening membrane insert.
  • a preferred embodiment according to the invention provides, however, that the working membrane is stiffened in its non-deformable membrane area by means of radially oriented and circumferentially existing spaced support ribs which are arranged on the side facing away from the pump chamber wall diaphragm bottom.
  • a working diaphragm which has stiffening support ribs on its lower side facing away from the pump chamber wall, can be formed from a single-layer material layer, at least in its non-deformable membrane.
  • Supporting ribs bracing the membrane region are delimited on both sides by the deformable annular zones, which form the hinge regions required for the flexing movements of the membrane during the pumping movements.
  • the support ribs can be arranged in the radial direction on the membrane underside.
  • the greater the angle of the support ribs to the radial the less the radial deformation of the support ribs and the deformation of the compression space associated with an increase in the harmful space and with a reduction in the final vacuum facing contour of the ribs.
  • a development according to the invention provides that the support ribs have a curved longitudinal extension and are thus arranged practically helically on the diaphragm underside.
  • the ribs have a straight longitudinal extent, it can be advantageous if the support ribs preferably deviate up to ⁇ 30 ° from the radial.
  • circumferentially spaced support ribs have the same direction of curvature or deviation from the radial.
  • Working diaphragm has two acting as deformable hinge areas ring zones, between which a reinforced by means of supporting ribs undeformable Membrane region is arranged,
  • FIG. 2 shows the working diaphragm of FIG. 1 at the bottom dead center of its pumping movements
  • FIG. 4 the working diaphragm of FIGS. 1 to 3 in a modified embodiment.
  • a diaphragm pump 1 is shown in the region of its pump head 2.
  • the membrane pump 1 has a working diaphragm 3, which is clamped at its peripheral edge in the pump head.
  • a central fixing core 4 is formed, which is connected to the connecting rod 5 of a crank drive, not shown here.
  • the working diaphragm 3 oscillating during the pumping movements between the top dead center shown in FIG. 1 and the bottom dead center shown in FIG. 2 delimits a pump space 7 between itself and a concavely curved pump chamber wall 6.
  • the working diaphragm pump 1 shown here for example as a backing pump of a turbomolecular pump, operates in deeper vacuum regions, large pressure differences occur between the membrane top and bottom side. So that the working diaphragm 3 does not buckle under the differential pressure load which occurs between the upper and lower sides of the diaphragm, and as a result the pumping chamber volume is decisively reduced, the working diaphragm 3 has a stiffened annular zone which is substantially non-deformable during the pumping movements. This non-deformable membrane area is bounded by an inner annular zone 8 and an outer annular zone 9, which serve as deformable hinge areas during the pumping motions.
  • support ribs 10 are provided here, which are arranged on the pump chamber wall 6 facing away from the membrane bottom. These support ribs 10 are circumferentially spaced at regular intervals from each other. In order for the working diaphragm 3 -as shown in FIG. 1 -to be able to apply full surface to the pump chamber wall 6 at top dead center, the side of the support ribs 10 facing the pump chamber wall 6 is adapted to the contour of the pump chamber wall 6.
  • the support ribs 10 may have a straight longitudinal extent. In order to favor the stiffening of the working membrane 3 in the non-deformable annular zone, it may be advantageous if the support ribs 10 preferably deviate up to + 30 ° from the radial. But it is also possible that the support ribs - as shown in Fig. 4 - have a curved longitudinal extent and are arranged practically helically on the diaphragm underside.

Landscapes

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

Abstract

L'invention concerne une pompe à diaphragme (1) comportant un diaphragme de travail (3) oscillant pendant les mouvements de pompage, entre un point mort inférieur et un point mort supérieur. Ledit diaphragme délimite une chambre de pompage (7) entre elle et une paroi concave (6) de ladite chambre. Au point mort supérieur, le diaphragme de travail (3) repose sur la paroi de la chambre de pompage (6). Ladite pompe à diaphragme se caractérise en ce que son diaphragme de travail (3) présente une zone annulaire intérieure et une zone annulaire extérieure (8 et 9), qui peuvent être déformées pendant les mouvements de pompage, et en ce qu'une zone de diaphragme rigidifiée et sensiblement indéformable pendant les mouvements de pompage est aménagée entre ces zones annulaires (8, 9). A cet effet, cette zone de diaphragme peut être rigidifiée par exemple au moyen de lèvres d'appui (10) orientées dans le sens radial et à distance les unes des autres dans le sens périphérique. Le diaphragme de travail (3) de la pompe à diaphragme (1) selon l'invention n'a par ailleurs pas tendance, même en cas de sollicitations en pression différentielle intervenant entre la face supérieure et la face inférieure du diaphragme, à induire une augmentation du volume de l'espace mort ou une diminution du volume de la chambre d'aspiration.
EP04714736A 2003-03-22 2004-02-26 Pompe a diaphragme Expired - Lifetime EP1525399B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10312899A DE10312899A1 (de) 2003-03-22 2003-03-22 Membranpumpe
DE10312899 2003-03-22
PCT/EP2004/001887 WO2004083639A1 (fr) 2003-03-22 2004-02-26 Pompe a diaphragme

Publications (2)

Publication Number Publication Date
EP1525399A1 true EP1525399A1 (fr) 2005-04-27
EP1525399B1 EP1525399B1 (fr) 2008-06-25

Family

ID=32946075

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04714736A Expired - Lifetime EP1525399B1 (fr) 2003-03-22 2004-02-26 Pompe a diaphragme

Country Status (5)

Country Link
US (1) US7363850B2 (fr)
EP (1) EP1525399B1 (fr)
JP (1) JP2006520868A (fr)
DE (2) DE10312899A1 (fr)
WO (1) WO2004083639A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0409446D0 (en) 2004-04-28 2004-06-02 Smith & Nephew Apparatus
FR2921443A1 (fr) * 2007-09-20 2009-03-27 Fresenius Vial Soc Par Actions Pompe peristaltique lineaire a doigts ainsi qu'une membrane et un doigt pour une telle pompe
ES2776709T3 (es) 2007-11-21 2020-07-31 Smith & Nephew Apósito para heridas
GB0723855D0 (en) 2007-12-06 2008-01-16 Smith & Nephew Apparatus and method for wound volume measurement
JP4792598B2 (ja) 2008-03-24 2011-10-12 株式会社日本製鋼所 水素透過モジュールおよびその使用方法
US8444596B2 (en) * 2009-06-22 2013-05-21 Lansinoh Laboratories, Inc. Breast milk collection apparatus and components thereof
GB201015656D0 (en) 2010-09-20 2010-10-27 Smith & Nephew Pressure control apparatus
US9067003B2 (en) 2011-05-26 2015-06-30 Kalypto Medical, Inc. Method for providing negative pressure to a negative pressure wound therapy bandage
US9084845B2 (en) 2011-11-02 2015-07-21 Smith & Nephew Plc Reduced pressure therapy apparatuses and methods of using same
US9901664B2 (en) 2012-03-20 2018-02-27 Smith & Nephew Plc Controlling operation of a reduced pressure therapy system based on dynamic duty cycle threshold determination
US9427505B2 (en) 2012-05-15 2016-08-30 Smith & Nephew Plc Negative pressure wound therapy apparatus
AU2015370583B2 (en) 2014-12-22 2020-08-20 Smith & Nephew Plc Negative pressure wound therapy apparatus and methods
DE102019135153A1 (de) * 2019-12-19 2021-06-24 Prominent Gmbh Dosierpumpe mit Dosiermembran
DE102020126241B4 (de) * 2020-10-07 2026-03-19 Alfmeier Präzision SE Membrananordnung mit um den Membrankörper umlaufendem Ring sowie Sitzanordnung und Pumpenanordnung
PL4305501T3 (pl) 2022-06-01 2024-07-15 Husqvarna Ab Reduktor ciśnienia

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3947156A (en) 1972-03-08 1976-03-30 Erich Becker Diaphragm pump, particularly for the generation of vacuum
WO1993018305A1 (fr) 1992-03-05 1993-09-16 Joe Santa & Associates Pty. Limited Pompe, soupape de commande et diaphragme
US5349896A (en) 1993-06-14 1994-09-27 W. L. Gore & Associates, Inc. Pump diaphragm
DE19510828C2 (de) 1995-03-24 1998-12-24 Knf Neuberger Gmbh Membranpumpe mit einer Formmembran
DE19834468C1 (de) 1998-07-30 2000-02-24 Asf Thomas Ind Gmbh Membrane für eine Membranpumpe
DE19906317C1 (de) * 1999-02-16 2000-10-19 Knf Flodos Ag Sursee Membranpumpe
ATE368181T1 (de) * 2001-01-02 2007-08-15 Medela Holding Ag Membranpumpe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004083639A1 *

Also Published As

Publication number Publication date
JP2006520868A (ja) 2006-09-14
DE502004007433D1 (de) 2008-08-07
US20060039806A1 (en) 2006-02-23
DE10312899A1 (de) 2004-10-07
WO2004083639A1 (fr) 2004-09-30
US7363850B2 (en) 2008-04-29
EP1525399B1 (fr) 2008-06-25

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