EP0922164B1 - Membranpumpe - Google Patents
Membranpumpe Download PDFInfo
- Publication number
- EP0922164B1 EP0922164B1 EP97933693A EP97933693A EP0922164B1 EP 0922164 B1 EP0922164 B1 EP 0922164B1 EP 97933693 A EP97933693 A EP 97933693A EP 97933693 A EP97933693 A EP 97933693A EP 0922164 B1 EP0922164 B1 EP 0922164B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- connecting rod
- diaphragm
- membrane
- fastening
- diaphragm pump
- 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.)
- Expired - Lifetime
Links
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 239000012528 membrane Substances 0.000 description 83
- 230000000295 complement effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
Images
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
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
-
- 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 crank drive and one connected to the connecting rod elastic membrane, which membrane at their compression space facing back at least one undercut Fastening opening for inserting the complementary shaped Fastening end of the connecting rod, wherein the connecting rod a support surface to the underside of its fastening end Support of the central one, which has a contact surface Has membrane area and the supporting surface of the connecting rod at least one protruding approximately in the axial direction of the connecting rod Fastening projection for positive engagement in at least one central opening Membrane area is provided.
- Diaphragm pumps are also used, for example, as micromembrane pumps used in portable analyzers. Because these analyzers and their micromembrane pumps mostly independent of the power grid Motors or batteries are operated for this purpose a low power consumption is required. Such engines have however only a low performance, which is why the Flexing work of the membrane during the operation of these previously known Micro diaphragm pumps is to be reduced. With such weak Motors, the membrane must therefore be made sufficiently thin, but should - especially with analyzers - again be very tight so as not to increase the accuracy of these devices affect.
- Micro diaphragm pumps are already known, their diaphragm between a metallic pressure disc facing the compression chamber and the connecting rod head is clamped, the thrust washer on Connecting rod head is fastened by means of a screw connection, which penetrates a central fastening opening of the membrane.
- pressure plate clamping has a central one inelastic area of the membrane resulting in the Stroke volume reduced and the performance of the known Micro diaphragm pump is restricted.
- a micro diaphragm pump has therefore also been created in which the clamped with its peripheral edge area in the pump head Diaphragm a connecting rod head approximately T-shaped in cross section encloses positively. Through this positive connection The diaphragm on the connecting rod head can be attached to the pressure plate clamp mentioned above the membrane can be dispensed with.
- This previously known Micro diaphragm pump has a larger stroke volume because of the diaphragm is also elastic in its central area. During operation The membrane of the known micromembrane pump moves on the connecting rod head enclosed by her, what with an additional flexing work of the membrane is connected.
- a diaphragm pump is already known from DE 33 11 104 A1 known type, the membrane of which the Compression chamber facing away from the underside of an undercut Has mounting opening.
- This mounting hole is with the complementary shaped end of a connecting rod connected.
- a Fastening projection provided in the fastening opening is molded.
- the fastening projection is above a Fastening end of the connecting rod in front of the support surface for supporting a central support surface on the underside having membrane area is used.
- the achievement of this task consists in the Diaphragm pump of the type mentioned at the outset, in particular in that at least one cone-shaped on the underside of the membrane Insert part is provided, and that the insert part in Mounting position on the one fastening projection or several connecting tabs of the connecting rod are on the side.
- the connecting rod has one Support surface, which is a central, a support surface having membrane area supports. Because of her Membrane underside supported, this can become during of the business do not move back and forth on the connecting rod, which unwanted additional flexing work of the membrane is avoided. In particular, a larger support ring also exercises influence the possible delivery capacity of the membrane, because this is especially the case with a larger diameter of the support ring creates a larger piston-like zone that does not deform during the up and down stroke and thus leads to a larger stroke volume.
- This configuration of the Membrane allows a relatively small, fixed diameter of the connecting rod, so that there are relatively large elastic zones form the too low voltages in the membrane and this leads to a larger stroke in relation to the effective diameter of the membrane.
- the membrane is therefore characterized by better membrane expansion ratios and their always constant perfect fit. Since the membrane of the invention Diaphragm pump no longer has a central fastening opening required, this membrane is on the connecting rod attachment in the In contrast to the known pressure plate clamping, it is very tight.
- the provided according to the invention and preferably on one annular fastening projection or at least three, approximately evenly spaced fastening projections adjacent, peg-shaped insert part of the invention The membrane takes over the centering and guiding of the membrane during the swinging movements. At the same time, this takes on cone-shaped Insert the radial and axial guidance of the membrane opposite the connecting rod. This makes the membrane so precise the connecting rod fixes that both radial and axial forces not change them from their position in relation to the connecting rod.
- an embodiment is preferred in which an annular fastening projection arranged on a circle concentric with the connecting rod longitudinal axis is provided with a rear engagement edge projecting laterally like a hook on its free edge region.
- a fastening projection on the connecting rod favors the good centering and guiding of the membrane during its swinging movements; at the same time, the membrane is particularly precisely fixed on the connecting rod.
- several, preferably at least three, fastening projections arranged on a circle concentric with the connecting rod longitudinal axis are provided.
- a particularly advantageous embodiment according to the invention provides that the one located at the end of the connecting rod Support surface for supporting the central one on the underside Contact area having membrane area, approximately radial has over the cross-section of the connecting rod protruding support collar and that the central contact surface of the membrane accordingly this enlarged support surface are dimensioned.
- the appropriately dimensioned membrane transmits via its central Contact surface some of the compressive forces on the approximately radial Support collar protruding over the cross-section of the connecting rod.
- a central centering projection for engaging in a counter recess in the membrane is provided.
- the diaphragm pump according to the invention as a micro diaphragm pump is trained.
- the single figure shows the crank drive 1 and one with a Connecting rod 2 of the crank drive 1 connected membrane 3 one Diaphragm pump in a schematic representation.
- the connecting rod 2 of the crank drive 1 is connected to the membrane 3 in such a way that the membrane 3 on the connecting rod 2 during operation of the Diaphragm pump is moved back and forth.
- the connecting rod 2 has on its membrane 3 facing Fastening end of a support surface 4 for underside support of the central membrane area having a support surface 5.
- A stands above the support surface 4 of the connecting rod 2 ring-shaped arranged concentrically to the connecting rod longitudinal axis Fastening projection 6 in front of the free edge area a rear gripping edge projecting laterally outwards like a hook 7 has.
- the connecting rod in the axial direction 2 protruding fastening projection 6 engages in a form-fitting manner trained as an annular groove and in their clear cross-section correspondingly hook-shaped fastening opening 8 on the underside of the membrane.
- This annular mounting opening 8 is limited to the Membrane underside a peg-shaped insert 9, which in the single figure on the inner peripheral edge of the annular Fastening projection 6 is present.
- the support surface 4 provided on the connecting rod 2 supports the central the contact area 5 having membrane area of the membrane 3 from. Through the membrane supported on the underside of the membrane 3, this can occur during the operation of the diaphragm pump Do not move the connecting rods back and forth, creating an undesirable additional flexing work of the membrane 3 is avoided.
- a larger support surface also exercises one Influence on the possible delivery capacity of the membrane 3, because this is especially the case with a larger diameter the support surface 4 creates a larger piston-like zone that does not deform during the up and down stroke and thus leads to a larger stroke volume.
- this allows Construction a relatively small fixed diameter of the connecting rod 2, so that relatively large elastic zones are formed, the too low tensions in the membrane 3 and this leads to a larger stroke in relation to the effective diameter of the membrane 3.
- the membrane 3 is therefore characterized better membrane expansion ratios and their always constant perfect fit. Because the membrane 3 of here shown diaphragm pump no central mounting opening has more, this membrane 3 is on the connecting rod attachment in the In contrast to the known pressure plate clamping, it is very tight.
- the peg-shaped insert 9 takes over during the swinging movements centering and guiding the membrane. there the central insert 9 also favors the radial and axial guidance of the diaphragm 3 relative to the connecting rod 2.
- a central centering projection 11 may also be provided, which engages in a counter recess of the membrane 3.
- the compression chamber of the pump facing side of the membrane 3 free of fasteners be designed. To ensure a high level of tightness at the To achieve connecting rod attachment, it is advantageous if the Membrane closed continuously towards the compression chamber is trained.
- the membrane 3 is thus characterized by a high level of tightness on the connecting rod attachment.
- the membrane can both as a flat as well as a structural or a shaped membrane be trained.
- By designing the membrane 3 as Formed membranes can create smaller harmful spaces and therefore higher ones Compression ratios can be achieved.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Description
Möglich ist aber auch, daß mehrere, vorzugsweise zumindest drei auf einem zur Pleuellängsachse konzentrischen Kreis angeordnete Befestigungsvorsprünge vorgesehen sind.
Claims (8)
- Membranpumpe mit einem einen Pleuel (2) aufweisenden Kurbelantrieb (1) und einer mit dem Pleuel (2) verbundenen, elastischen Membrane (3), welche Membrane (3) an ihrer dem Verdichtungsraum abgewandten Rückseite wenigstens eine hinterschnittene Befestigungsöffnung (8) zum Einsetzen des komplementär geformten Befestigungsendes des Pleuels (2) aufweist, wobei das Pleuel (2) an seinem Befestigungsende eine Stützfläche (4) zur unterseitigen Abstützung des zentralen, eine Auflagefläche (5) aufweisenden Membranbereiches hat und wobei über die Stützfläche (4) des Pleuels zumindest ein etwa in axialer Richtung des Pleuels vorstehender Befestigungsvorsprung zum formschlüssigen Eingreifen in den, wenigstens eine Befestigungsöffnung (8) aufweisenden zentralen Membranbereich vorgesehen ist, dadurch gekennzeichnet, daß an der Membranunterseite wenigstens ein zapfenförmiges Einsatzteil (9) vorgesehen ist und daß das Einsatzteil (9) in Montagestellung an dem einen Befestigungsvorsprung oder an mehreren Befestigungsvorsprüngen (6) des Pleuels seitlich anliegt.
- Membranpumpe nach Anspruch 1, dadurch gekennzeichnet, daß mehrere, auf einem zur Pleuellängsachse konzentrischen Kreis angeordnete Befestigungsvorsprünge vorgesehen sind.
- Membranpumpe nach Anspruch 1, dadurch gekennzeichnet, daß ein auf einem zur Pleuellängsachse konzentrischen Kreis angeordneter, ringförmiger Befestigungsvorsprung (6) mit einem an seinem freien Randbereich hakenartig seitlich vorspringenden Hintergreifrand (7) vorgesehen ist.
- Membranpumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die am Befestigungsende des Pleuels (2) befindliche Stützfläche (4) zur unterseitigen Abstützung des zentralen, eine Auflagefläche (5) aufweisenden Membranbereiches, einen etwa radial über den Querschnitt des Pleuels (2) überstehenden Stützkragen (10) hat und daß die zentrale Auflagefläche (5) der Membrane (3) entsprechend dieser vergrößerten Stützfläche (4) dimensioniert ist.
- Membranpumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß an der Stützfläche (4) des Pleuels (2) ein vorzugsweise zentraler Zentriervorsprung (11) zum Eingreifen in eine Gegenausnehmung der Membrane vorgesehen ist.
- Membranpumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die dem Verdichtungsraum der Pumpe zugewandte Seite der Membrane (3) befestigungsmittelfrei ist.
- Membranpumpe nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Membrane (3) dem Verdichtungsraum zugewandt durchgehend geschlossen ausgebildet ist.
- Membranpumpe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß sie als Mikromembranpumpe ausgebildet ist.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19634922A DE19634922C2 (de) | 1996-08-29 | 1996-08-29 | Membranpumpe |
| DE19634922 | 1996-08-29 | ||
| PCT/EP1997/003941 WO1998009078A1 (de) | 1996-08-29 | 1997-07-22 | Membranpumpe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0922164A1 EP0922164A1 (de) | 1999-06-16 |
| EP0922164B1 true EP0922164B1 (de) | 2003-03-26 |
Family
ID=7804013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97933693A Expired - Lifetime EP0922164B1 (de) | 1996-08-29 | 1997-07-22 | Membranpumpe |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6065389A (de) |
| EP (1) | EP0922164B1 (de) |
| JP (1) | JP2000502778A (de) |
| KR (1) | KR100316470B1 (de) |
| DE (2) | DE19634922C2 (de) |
| WO (1) | WO1998009078A1 (de) |
Families Citing this family (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9917736D0 (en) | 1999-07-29 | 1999-09-29 | Munster Simms Eng Ltd | Diaphragm pumps |
| DE10224750A1 (de) | 2002-06-04 | 2003-12-24 | Fresenius Medical Care De Gmbh | Vorrichtung zur Behandlung einer medizinischen Flüssigkeit |
| US6901960B2 (en) * | 2002-09-06 | 2005-06-07 | Ingersoll-Rand Company | Double diaphragm pump including spool valve air motor |
| US6865981B2 (en) * | 2003-03-11 | 2005-03-15 | Ingersoll-Rand Company | Method of producing a pump |
| US6883417B2 (en) * | 2003-03-19 | 2005-04-26 | Ingersoll-Rand Company | Connecting configuration for a diaphragm in a diaphragm pump |
| US20050272001A1 (en) * | 2004-06-03 | 2005-12-08 | Blain Christopher C | Oral care device |
| US7530796B2 (en) * | 2004-12-07 | 2009-05-12 | The Gillette Company | Compressors |
| US8444416B2 (en) | 2005-04-26 | 2013-05-21 | Braun Gmbh | Valves for personal care devices |
| US8197231B2 (en) | 2005-07-13 | 2012-06-12 | Purity Solutions Llc | Diaphragm pump and related methods |
| US20070017582A1 (en) * | 2005-07-20 | 2007-01-25 | Chenvainu Alexander T | Fluid couplings |
| ES2321140T3 (es) * | 2005-11-09 | 2009-06-02 | Dlp Limited | Bomba de membrana. |
| GB2432195A (en) * | 2005-11-09 | 2007-05-16 | Dlp Ltd | Reciprocating diaphragm shower drain pump |
| US20070134112A1 (en) * | 2005-12-14 | 2007-06-14 | Hupp Evan L | Button diaphragm piston pump |
| DE102007028184A1 (de) | 2007-06-20 | 2008-12-24 | Braun Gmbh | Bürstenkopf für eine Zahnbürste |
| US8192401B2 (en) | 2009-03-20 | 2012-06-05 | Fresenius Medical Care Holdings, Inc. | Medical fluid pump systems and related components and methods |
| CN102497895A (zh) | 2009-07-15 | 2012-06-13 | 弗雷塞尼斯医疗保健控股公司 | 医疗流体盒及相关系统和方法 |
| EP2654825B1 (de) | 2010-12-20 | 2017-08-02 | Fresenius Medical Care Holdings, Inc. | Medizinische flüssigkeitskassetten sowie entsprechende systeme und verfahren |
| US9624915B2 (en) | 2011-03-09 | 2017-04-18 | Fresenius Medical Care Holdings, Inc. | Medical fluid delivery sets and related systems and methods |
| CN103648540B (zh) * | 2011-04-21 | 2016-06-01 | 弗雷塞尼斯医疗保健控股公司 | 医疗流体泵送系统及相关装置和方法 |
| US9700457B2 (en) | 2012-03-17 | 2017-07-11 | Abbott Medical Optics Inc. | Surgical cassette |
| US9610392B2 (en) | 2012-06-08 | 2017-04-04 | Fresenius Medical Care Holdings, Inc. | Medical fluid cassettes and related systems and methods |
| US9500188B2 (en) | 2012-06-11 | 2016-11-22 | Fresenius Medical Care Holdings, Inc. | Medical fluid cassettes and related systems and methods |
| US9561323B2 (en) | 2013-03-14 | 2017-02-07 | Fresenius Medical Care Holdings, Inc. | Medical fluid cassette leak detection methods and devices |
| US10117985B2 (en) | 2013-08-21 | 2018-11-06 | Fresenius Medical Care Holdings, Inc. | Determining a volume of medical fluid pumped into or out of a medical fluid cassette |
| US10330094B2 (en) | 2013-08-26 | 2019-06-25 | Blue-White Industries, Ltd. | Sealing diaphragm and methods of manufacturing said diaphragm |
| DE102015226463A1 (de) * | 2015-12-22 | 2017-06-22 | Robert Bosch Gmbh | Magnetaktor für ein Förderaggregat |
| DE102020125567B4 (de) | 2020-09-30 | 2026-04-09 | Ulman Dichtungstechnik Gmbh | Verbundmembran mit Einsatz und Öffnung umgebende Verdickung für Membranpumpen |
| CN113153712A (zh) * | 2021-04-27 | 2021-07-23 | 烟台东德氢能技术有限公司 | 一种隔膜压缩机 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2287627A (en) * | 1940-01-23 | 1942-06-23 | Job F Malsbary | Diaphragm pump |
| US2641283A (en) * | 1947-10-13 | 1953-06-09 | Junius W Houston | Pumping device |
| US3203186A (en) * | 1960-08-25 | 1965-08-31 | Edwin J Lukas | Force transmitting system |
| FR1564867A (de) * | 1968-02-29 | 1969-04-25 | ||
| DE3311104A1 (de) * | 1983-03-26 | 1984-09-27 | Erich 7812 Bad Krozingen Becker | Membranpumpe |
| DE3311105C2 (de) * | 1983-03-26 | 1987-01-29 | Albert Klopfer Gmbh, 7253 Renningen | Revolverkopf |
| DE29505021U1 (de) * | 1995-03-24 | 1995-05-18 | Knf-Neuberger Gmbh, 79112 Freiburg | Membranpumpe mit einer Formmembran |
-
1996
- 1996-08-29 DE DE19634922A patent/DE19634922C2/de not_active Expired - Lifetime
-
1997
- 1997-07-22 JP JP10511212A patent/JP2000502778A/ja active Pending
- 1997-07-22 WO PCT/EP1997/003941 patent/WO1998009078A1/de not_active Ceased
- 1997-07-22 DE DE59709640T patent/DE59709640D1/de not_active Expired - Lifetime
- 1997-07-22 KR KR1019997001429A patent/KR100316470B1/ko not_active Expired - Lifetime
- 1997-07-22 EP EP97933693A patent/EP0922164B1/de not_active Expired - Lifetime
-
1999
- 1999-02-25 US US09/257,901 patent/US6065389A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| WO1998009078A1 (de) | 1998-03-05 |
| DE59709640D1 (de) | 2003-04-30 |
| DE19634922C2 (de) | 2000-03-23 |
| JP2000502778A (ja) | 2000-03-07 |
| DE19634922A1 (de) | 1998-03-05 |
| KR20000035807A (ko) | 2000-06-26 |
| US6065389A (en) | 2000-05-23 |
| KR100316470B1 (ko) | 2001-12-12 |
| EP0922164A1 (de) | 1999-06-16 |
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