EP0939860A1 - Pompe a membrane - Google Patents

Pompe a membrane

Info

Publication number
EP0939860A1
EP0939860A1 EP97951198A EP97951198A EP0939860A1 EP 0939860 A1 EP0939860 A1 EP 0939860A1 EP 97951198 A EP97951198 A EP 97951198A EP 97951198 A EP97951198 A EP 97951198A EP 0939860 A1 EP0939860 A1 EP 0939860A1
Authority
EP
European Patent Office
Prior art keywords
membrane
support
diaphragm
connecting rod
central
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.)
Withdrawn
Application number
EP97951198A
Other languages
German (de)
English (en)
Inventor
Heinz Riedlinger
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 EP0939860A1 publication Critical patent/EP0939860A1/fr
Withdrawn legal-status Critical Current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
    • 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 a connecting rod having a crank drive and an elastic membrane connected to the connecting rod, the membrane having a top surface of the pump in a top dead center position of the crank drive on an adjacent pump chamber wall which delimits a compression chamber and which faces away from the compression chamber on its side
  • Membrane rear side has a central undercut fastening opening for inserting a form-fitting fastening part connected to the connecting rod, as well as with a dimensionally stable membrane support connected to the connecting rod, which supports the membrane on its membrane rear side at least in a central area in a form-fitting manner.
  • a diaphragm pump of the type mentioned at the outset which has a crank drive, the connecting rod of which is connected to an elastic form membrane. While the upper side of the diaphragm is adapted to the shape of an adjacent pump chamber wall delimiting a compression space, the shaped diaphragm of the known diaphragm pump has a central undercut fastening opening on its rear side facing away from the compression space. A complementarily shaped mushroom-shaped fastening part is inserted into this fastening opening and is connected to the connecting rod via a screw thread protruding from the fastening opening.
  • the shaped membrane is supported on its membrane back by means of a dimensionally stable membrane support, which is connected in one piece to the connecting rod and is adapted to the shape of the membrane in a central area.
  • the fastening part molded into the shaped membrane of the known membrane pump extends over a large part of the membrane cross-section, the shaped membrane has one outer ring area only a relatively small elastic zone, which only allows correspondingly small strokes of the crank drive and leads to a reduced stroke volume, limited performance and large tensions in the membrane.
  • the inventive solution to this problem consists in particular in the diaphragm pump of the type mentioned in the fact that the diaphragm support in an upper dead center position is free of pinch pressure and essentially flat on the back of the diaphragm, that there is an under in the central region of the support designed as an assembly centering Consideration of the course of the diaphragm cross section adjoins the portion of the support which is adapted to the shape of the pump chamber wall, and that the diameter of the fastening part is less than one third of the diaphragm cross section which is adapted to the shape of the pump chamber wall.
  • the diaphragm according to the invention is fastened to the connecting rod by means of a fastening part, the diameter of which is less than one third of the active diaphragm cross section which is adapted to the shape of the pump chamber wall. Since the central area of the diaphragm stiffened due to the fastening part inserted into the molded diaphragm is thus kept comparatively small, the diaphragm of the diaphragm pump according to the invention has a large elastic area which can lie well against the pump chamber wall delimiting the compression chamber and also large strokes in an upper dead center position allowed. The diaphragm pump according to the invention is therefore characterized by a large stroke volume and high performance.
  • the membrane Since the membrane is supported on the back of the membrane by means of a membrane support, the membrane cannot deform in an uncontrolled manner despite its high elasticity. An undesirably high flex work of the membrane is thus avoided; At the same time, the high elasticity of the membrane counteracts tensions which put additional strain on the membrane.
  • the diaphragm In the top dead center position, the diaphragm, with its form-adapted diaphragm top, lies against the pump chamber wall, while the diaphragm support supports the diaphragm on its opposite diaphragm back without any squeeze pressure and essentially flat.
  • the diaphragm support has a partial area which is adapted to the shape of the diaphragm cross-section on the pump chamber wall and which adjoins the central area of the diaphragm support.
  • This central area of the support is designed as an assembly centering which, despite the comparatively small fastening part and the high elasticity of the membrane, ensures that the pump chamber wall, the membrane and the support are arranged correctly in relation to one another. Since the membrane of the membrane pump according to the invention in its active, which delimits the compression space Membrane area can be formed essentially without profiling and does not require stabilizing ribs, the membrane of the membrane pump according to the invention can be produced comparatively easily.
  • the membrane support is mushroom-shaped and has a central depression facing the membrane for receiving a central membrane thickening which preferably has the fastening opening.
  • This form-fitting membrane thickening which engages in the central depression of the membrane support, serves as assembly centering, which favors a correct arrangement of the membrane support and the associated membrane.
  • a simple construction and manufacture of the diaphragm is made even easier if the fastening part has a threaded pin that can be screwed into a threaded bore of the connecting rod and if a central through opening for this threaded pin is provided in the diaphragm support.
  • the diaphragm support has a rear side
  • a diaphragm pump 1 is shown, the Crankcase 2 is connected to a pump head, which has an intermediate cover 3 and an end cover 4.
  • a crank drive 5 having a connecting rod 6 is provided in the crankcase 2 of the diaphragm pump 1.
  • the connecting rod 6 is connected to a shaped membrane 7, which is tightly clamped with its outer edge 8 between the crankcase 2 and the intermediate cover 3.
  • the diaphragm 7 is set in oscillating stroke movements by means of the crank drive 5.
  • a pump chamber wall 9 is provided on the intermediate cover 3, which forms a spherical cap-shaped recess in the intermediate cover 3 and delimits a compression chamber 10 between itself and the membrane 7.
  • the compression chamber 10 is connected to an inlet valve 11 and an outlet valve 12 via channels not shown here.
  • the diaphragm 7 While the upper side of the diaphragm 13 of the diaphragm 7 is adapted to the shape of the pump chamber wall 9 delimiting the compression chamber 10 in an upper dead center position, the diaphragm 7 has a central undercut fastening opening on its diaphragm rear side 14 facing away from the compression chamber 10, into which a complementarily shaped fastening part 15 is inserted.
  • the fastening part 15 connects the connecting rod 6 to the diaphragm 7 and, for this purpose, has a threaded pin 16 which can be screwed into an end threaded bore of the connecting rod.
  • the diameter of the fastening part 15 is less than a third of the membrane cross-section adapted to the shape of the pump chamber wall 9. Since the steel fastening part 15 thus has a comparatively small diameter, the membrane 7 is characterized by a large elastic zone in the area A, which can lie well against the pump chamber wall 9 delimiting the compression chamber 10 in an upper dead center position. by virtue of The large elastic ring zone in area A results in lower tensions within the membrane 7, so that it can work with larger diameters or with the same diameters with smaller diameters in comparison with previously known diaphragm pumps. The diaphragm pump 1 therefore has a correspondingly large stroke volume.
  • a diaphragm support 17 is held between the connecting rod end face and the fastening part 15, which supports the diaphragm 7 on its diaphragm rear side 14 in a central area designed as an assembly centering and which, in an upper dead center position, presses almost the entire diaphragm rear side without squeezing pressure and essentially flat . Since the membrane support 17 positively supports the membrane 7 during the lifting movements in a central area B with the largest possible diameter, the membrane in this large central area B cannot deflect downward under pressure.
  • the outer ring zone C is optimally supported by the diaphragm support, the diaphragm support 17 in the top dead center position rests on the back of the membrane free of squeezing pressure and essentially flat.
  • the contour of the membrane support 17 facing the membrane back 14 thus corresponds exactly to the contour of the membrane 7 on its membrane back 14 at the top dead center. Since the contour of the membrane top 13 corresponds to the contour of the pump chamber wall 9 at the top dead center, a high compression ratio can be achieved.
  • the membrane support 17 is approximately mushroom-shaped and has a plate-shaped central depression facing the membrane 7 for receiving a complementarily shaped central membrane thickening 19, in which the fastening opening for the fastening part 15 is also provided. Since the membrane is supported on its membrane back 14 by means of the membrane support 17, the membrane 7 cannot deform in an uncontrolled manner despite its high elasticity. An undesirably high flexing of the membrane 7 is thus avoided; At the same time, the high elasticity counteracts tensions that could put additional strain on the membrane. In the top dead center position, the membrane with its shape-adapted membrane upper side 13 bears against the pump chamber wall 9, while the membrane support 17 supports the membrane 7 on its opposite membrane rear side 14.
  • the membrane support 17 has a partial area which is adapted to the shape of the pump cross-section 9, taking into account the membrane cross-sectional profile, which adjoins the central area of the support 17.
  • This central area of the support 17, which receives the membrane thickening 19, is designed as an assembly centering which, despite the comparatively small fastening part 15 and the high elasticity of the membrane 7, ensures that the pump chamber wall 9, the membrane 7 and the support 17 are arranged in a correct position relative to one another.

Landscapes

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

Abstract

Cette pompe à membrane (1) comprend un mécanisme d'entraînement à manivelle (5) dont la bielle (6) est reliée à une membrane élastique (7) avec une face supérieure (13) de forme adaptée à une chambre de compression (10) lorsque le mécanisme d'entraînement à manivelle (5) est à son point mort supérieur. La face inférieure (14) de la membrane opposée à la chambre de compression (10) est pourvue d'une ouverture centrale découpée dans laquelle est introduite une pièce de fixation (15) de forme adaptée reliée à la bielle. Un support indéformable (17) a une forme adaptée et soutient la membrane (7) par sa face inférieure (14) au moins dans une zone centrale. La pompe à membrane décrite (1) se caractérise en ce que le support (17) de la membrane s'appuie sur le côté inférieur (14) de la membrane dans son point mort supérieur, sans l'écraser et sensiblement sur toute sa surface. Une zone partielle du support (17) de forme adaptée à la paroi (9) de la chambre de pompage, compte tenu de la variation de section transversale de la membrane, est adjacente à la zone centrale du support (17) qui sert à centrer le montage. Le diamètre de la pièce de fixation (15) est inférieur à un tiers de la section transversale de la membrane de forme adaptée à la paroi (9) de la chambre de pompage. La membrane (7) dans cette pompe à membrane (1) se caractérise par une grande zone élastique (A) qui neutralise des tensions indésirables dans la membrane et permet d'obtenir une pompe à membrane (1) avec un volume de refoulement relativement important.
EP97951198A 1996-11-20 1997-11-14 Pompe a membrane Withdrawn EP0939860A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19647882A DE19647882A1 (de) 1996-11-20 1996-11-20 Membranpumpe
DE19647882 1996-11-20
PCT/EP1997/006354 WO1998022713A1 (fr) 1996-11-20 1997-11-14 Pompe a membrane

Publications (1)

Publication Number Publication Date
EP0939860A1 true EP0939860A1 (fr) 1999-09-08

Family

ID=7812150

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97951198A Withdrawn EP0939860A1 (fr) 1996-11-20 1997-11-14 Pompe a membrane

Country Status (4)

Country Link
EP (1) EP0939860A1 (fr)
KR (1) KR20000049166A (fr)
DE (1) DE19647882A1 (fr)
WO (1) WO1998022713A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19952612A1 (de) * 1999-11-02 2001-05-03 Sp Juergen Schwarzer Gmbh U Co Membranpumpe
US6871551B2 (en) 2000-06-28 2005-03-29 Endress + Hauser Wetzer Gmbh + Co. Kg Apparatus for generating and conducting a fluid flow, and method of monitoring said apparatus
GB2367098B (en) * 2000-09-26 2002-10-30 Stirling Energy Systems Ltd Improvements in stirling engines with flexible diaphragms
DE102007039964B4 (de) * 2007-08-23 2011-06-22 Timmer Pneumatik GmbH, 48485 Hochdruck-Doppelmembranpumpe und Membranelement für eine solche Pumpe
KR101131922B1 (ko) * 2010-03-09 2012-04-03 강소대 상하부 챔버를 구비한 다이아프램
DE102020126241A1 (de) 2020-10-07 2022-04-07 Alfmeier Präzision SE Membrananordnung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH251212A (fr) * 1946-02-05 1947-10-15 Hanvag Ges Fuer Tech Vervollko Pompe à membrane.
DE1503428A1 (de) * 1966-01-12 1969-04-03 Hansa Metallwerke Ag Membranverdichter
FR1564867A (fr) 1968-02-29 1969-04-25
DE3311104A1 (de) * 1983-03-26 1984-09-27 Erich 7812 Bad Krozingen Becker Membranpumpe
DE4007932A1 (de) * 1990-03-13 1991-09-19 Knf Neuberger Gmbh Membranpumpe mit einer formmembrane
DE19510828C2 (de) * 1995-03-24 1998-12-24 Knf Neuberger Gmbh Membranpumpe mit einer Formmembran
DE29612117U1 (de) * 1996-07-11 1996-09-12 ASF THOMAS Industries GmbH, 82178 Puchheim Membrane für eine Membranpumpe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9822713A1 *

Also Published As

Publication number Publication date
DE19647882A1 (de) 1998-05-28
KR20000049166A (ko) 2000-07-25
WO1998022713A1 (fr) 1998-05-28

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