WO1998022713A1 - Pompe a membrane - Google Patents
Pompe a membrane Download PDFInfo
- Publication number
- WO1998022713A1 WO1998022713A1 PCT/EP1997/006354 EP9706354W WO9822713A1 WO 1998022713 A1 WO1998022713 A1 WO 1998022713A1 EP 9706354 W EP9706354 W EP 9706354W WO 9822713 A1 WO9822713 A1 WO 9822713A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- membrane
- support
- diaphragm
- connecting rod
- central
- Prior art date
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
-
- 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
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
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97951198A EP0939860A1 (fr) | 1996-11-20 | 1997-11-14 | Pompe a membrane |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19647882A DE19647882A1 (de) | 1996-11-20 | 1996-11-20 | Membranpumpe |
DE19647882.0 | 1996-11-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998022713A1 true WO1998022713A1 (fr) | 1998-05-28 |
Family
ID=7812150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1997/006354 WO1998022713A1 (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) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19952612A1 (de) * | 1999-11-02 | 2001-05-03 | Sp Juergen Schwarzer Gmbh U Co | Membranpumpe |
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 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH251212A (fr) * | 1946-02-05 | 1947-10-15 | Hanvag Ges Fuer Tech Vervollko | Pompe à membrane. |
FR1564867A (fr) | 1968-02-29 | 1969-04-25 | ||
DE29612117U1 (de) * | 1996-07-11 | 1996-09-12 | ASF THOMAS Industries GmbH, 82178 Puchheim | Membrane für eine Membranpumpe |
DE19510828A1 (de) * | 1995-03-24 | 1996-09-26 | Knf Neuberger Gmbh | Membranpumpe mit einer Formmembran |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1503428A1 (de) * | 1966-01-12 | 1969-04-03 | Hansa Metallwerke Ag | Membranverdichter |
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 |
-
1996
- 1996-11-20 DE DE19647882A patent/DE19647882A1/de not_active Withdrawn
-
1997
- 1997-11-14 WO PCT/EP1997/006354 patent/WO1998022713A1/fr not_active Application Discontinuation
- 1997-11-14 EP EP97951198A patent/EP0939860A1/fr not_active Withdrawn
- 1997-11-14 KR KR1019990703261A patent/KR20000049166A/ko not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH251212A (fr) * | 1946-02-05 | 1947-10-15 | Hanvag Ges Fuer Tech Vervollko | Pompe à membrane. |
FR1564867A (fr) | 1968-02-29 | 1969-04-25 | ||
DE19510828A1 (de) * | 1995-03-24 | 1996-09-26 | 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 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US7328626B2 (en) | 2000-06-28 | 2008-02-12 | Endress + Hauser Wetzer Gmbh + Co. Kg | Apparatus for generating and conducting a fluid flow, and method of monitoring said apparatus |
Also Published As
Publication number | Publication date |
---|---|
DE19647882A1 (de) | 1998-05-28 |
EP0939860A1 (fr) | 1999-09-08 |
KR20000049166A (ko) | 2000-07-25 |
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