EP3519696A1 - Pumpenmembran - Google Patents
PumpenmembranInfo
- Publication number
- EP3519696A1 EP3519696A1 EP17772683.3A EP17772683A EP3519696A1 EP 3519696 A1 EP3519696 A1 EP 3519696A1 EP 17772683 A EP17772683 A EP 17772683A EP 3519696 A1 EP3519696 A1 EP 3519696A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- rubber
- fluid
- diaphragm
- core
- 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
Links
- 229920001971 elastomer Polymers 0.000 claims abstract description 30
- 239000005060 rubber Substances 0.000 claims abstract description 30
- 239000012530 fluid Substances 0.000 claims abstract description 22
- 239000007787 solid Substances 0.000 claims abstract description 14
- 229920002943 EPDM rubber Polymers 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 229920000572 Nylon 6/12 Polymers 0.000 claims abstract description 6
- 229920001955 polyphenylene ether Polymers 0.000 claims abstract description 5
- 239000012528 membrane Substances 0.000 claims description 59
- 238000004873 anchoring Methods 0.000 claims description 27
- 239000004033 plastic Substances 0.000 claims description 9
- 229920003023 plastic Polymers 0.000 claims description 9
- 229920001707 polybutylene terephthalate Polymers 0.000 claims description 6
- 229920002379 silicone rubber Polymers 0.000 claims description 6
- 239000004945 silicone rubber Substances 0.000 claims description 6
- 239000012815 thermoplastic material Substances 0.000 claims description 5
- -1 polybutylene terephthalate Polymers 0.000 claims description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims 1
- 230000006378 damage Effects 0.000 abstract description 5
- 230000003313 weakening effect Effects 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 229920001169 thermoplastic Polymers 0.000 abstract 2
- 239000004416 thermosoftening plastic Substances 0.000 abstract 2
- 239000011162 core material Substances 0.000 description 49
- 238000005086 pumping Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- GVLZQVREHWQBJN-UHFFFAOYSA-N 3,5-dimethyl-7-oxabicyclo[2.2.1]hepta-1,3,5-triene Chemical compound CC1=C(O2)C(C)=CC2=C1 GVLZQVREHWQBJN-UHFFFAOYSA-N 0.000 description 3
- 150000002978 peroxides Chemical class 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000000502 dialysis Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 229920006099 Vestamid® Polymers 0.000 description 1
- 239000004732 Vestoran Substances 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
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
- F04B43/02—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
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
-
- 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
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
- F05C2225/02—Rubber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
- F05C2225/06—Polyamides, e.g. NYLON
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
- F05C2225/08—Thermoplastics
Definitions
- the invention relates to a pump diaphragm, in particular metering pump diaphragm, for a diaphragm pump for delivering a fluid.
- a diaphragm pump for conveying fluids has, as an essential element, a pump diaphragm which comprises a circular functional region and a peripheral clamping edge surrounding the functional region. With the clamping edge, it is mounted in the diaphragm pump. The drive of the pump through the pump diaphragm is separated from the fluid in the pump chamber. To convey the fluid, the circular functional area of the pump diaphragm in the operating state is deflected either hydraulically, pneumatically, mechanically or electromagnetically essentially along a longitudinal axis running through the center of the functional area. driven.
- Mechanically powered pump diaphragms typically include a flexible membrane body of rubber and a solid core partially embedded therein with a drive connector.
- the solid core is driven in most cases via a connecting rod and an eccentric of an electric motor.
- the pumping action is then achieved by the periodic deflection of the pump diaphragm resp. of the circular functional area of the pump diaphragm substantially along the longitudinal axis of the pump diaphragm extending through the center of the functional area, ie the deflection is not exactly axial, but the pump diaphragm usually also experiences a lateral resp depending on the geometric configuration of the driving components. staggering deflection.
- the solid core is made of metal or plastic and provided with a bonding agent which forms a more or less strong bonding layer between the core and the rubber of the membrane body.
- Such pump diaphragms are used, inter alia, in metering pumps z. B. used for dialysis machines, in which a certain, constant volume of fluid must be promoted in each pumping cycle.
- An object of the invention is to provide a pump diaphragm, in which a weakening or destruction of the connection between the core and membrane body is prevented or at least greatly delayed, and so a time-dependent change in the delivery volume does not occur or is at least greatly delayed.
- the pump diaphragm for a diaphragm pump for conveying a fluid comprises a fixed core with a connection device for a drive rod of the diaphragm pump and a plate-shaped, elastic membrane body made of rubber with a peripheral clamping edge.
- the solid core is at least partially embedded in the membrane body.
- the solid core is made of a thermoplastic material and adhesion promoter free forms with the elastic membrane body made of rubber covalent bonds.
- thermoplastic material and the rubber are chosen such that they enter into a direct, adhesion promoter-free chemical plastic-rubber bond to each other in the preparation of the pump membrane at the boundary layer to each other resp.
- Plastic and rubber are covalently cross-linked at the boundary layer. A vulnerable to weakening or destruction connecting layer between the core and membrane body is not present in this way.
- the core is first made of plastic and then the rubber vulcanized directly on the core. During the vulcanization of the rubber, the covalent bonds are also formed at the boundary layer between plastic and rubber.
- the rubber may be a peroxide cross-linked rubber, especially peroxide cross-linked ethylene-propylene-diene rubber (EPDM).
- EPDM peroxide cross-linked ethylene-propylene-diene rubber
- the plastic may be a polyamide 612 or a polyphenylene ether, especially poly-2,6-dimethyl-1,4-phenylene ether.
- plastic-rubber-material combinations are: polyamide 612 (as marketed, for example, under the trade name Vestamid DX 9325 "ISO 1874-1 PA612, MH, 14-100, GF40" by Evonik Industries AG) or polyphenylene ethers, in particular Poly-2,6-dimethyl-1,4-phenylene ether (such as marketed under the tradename Vestoran 1900 GF20 by Evonik Industries AG) together with a peroxide cross-linked ethylene-propylene-diene rubber (EPDM).
- polyamide 612 as marketed, for example, under the trade name Vestamid DX 9325 "ISO 1874-1 PA612, MH, 14-100, GF40” by Evonik Industries AG
- polyphenylene ethers in particular Poly-2,6-dimethyl-1,4-phenylene ether (such as marketed under the tradename Vestoran 1900 GF20 by Evonik Industries AG) together with a peroxide cross-linked ethylene-propylene
- the rubber may be a silicone rubber or fluoro-silicone rubber (MVQ / FMQV) and the plastic may be a polybutylene terephthalate (PBT).
- MVQ / FMQV fluoro-silicone rubber
- PBT polybutylene terephthalate
- the core can also have a form optimized for mechanical anchoring, as explained below. Both the chemical and mechanical anchoring features can also be considered as separate inventions that accomplish the same task of improved functionality and longevity.
- the combination of chemical anchoring with the mechanical anchoring shown below has a synergistic effect in that the overall surface area of the boundary layer between the core and the membrane body is significantly increased by the characteristics of the mechanical anchoring.
- the solid core may comprise a plate-shaped anchoring plate having a plurality of through holes.
- the passage openings are usually arranged in a ring around the longitudinal axis of the pump diaphragm.
- a particularly good mechanical anchoring of the membrane body to the core can be achieved by the passage openings from the fluid side facing away in the direction of the fluid-facing side seen at least one constriction of the Have cross-section. As a result, the force is better transferred from the core to the membrane body in a pulling movement of the drive.
- the constriction may be formed as a circumferential shoulder or flange and is usually approximately centrally in the through hole.
- the circumferential shoulder or flange may have interruptions, so that the constriction is formed by a plurality of longitudinal ribs.
- the constriction may also be formed by a conical passage opening.
- the anchoring plate may be at least partially embedded in the membrane body, wherein it is always completely covered on the fluid side by the membrane body. On the fluid-remote side, it may be partially exposed, ie. not completely covered by the membrane body.
- the solid core may comprise a plate-shaped anchoring plate having on the fluid-remote side an annular groove in which a plurality of through holes are arranged. This groove and the passage openings are completely filled at the pump diaphragm of the membrane body. As a result, the force is better transferred from the core to the membrane body in a pulling movement of the drive.
- a radially outer wall of the groove may have a lower height than a radially inner wall, so that a peripheral edge of the anchoring plate is completely surrounded by the membrane body.
- the annular groove may be combined with the above-described annularly arranged passage openings with constriction.
- the core may comprise a pin, at the fluid-remote end of which the connection device is arranged.
- the pin can have on the side facing the fluid a central blind hole which is filled by the membrane body.
- the connector may be a metallic threaded insert. This can be molded directly with the core. Alternatively, the connection device can also be formed integrally with the core.
- Fig. 2 is a sectional view of the pump diaphragm
- FIG 3 is a perspective view of the fluid-remote side of a fixed core of the pump diaphragm.
- FIG. 4 is a perspective view of the fluid-facing side of the fixed core
- Fig. 5 is a perspective partial sectional view of
- Fig. 1 shows a perspective view of a pump diaphragm 1 for a diaphragm pump, in particular a Dosiermembranpumpe, for conveying a fluid.
- Fig. 2 shows a sectional view through the pump membrane from FIG. 1.
- the pump membrane 1 comprises a plate-shaped, elastic membrane body 2 made of rubber with a circular functional region 8 and a peripheral clamping edge 6 revolving around a longitudinal axis A of the pump membrane 1.
- the longitudinal axis A runs through the center of the circular functional area 8 and parallel to the deflection direction of the Pumenpenmembranl.
- the pump diaphragm 1 is in the installed state with the clamping edge 6 in a pump housing for delimiting a pump chamber, in which flows the fluid to be pumped, kept sealed.
- the clamping edge 6 is T-shaped in cross-section. Other shapes are also possible.
- the pump membrane 1 comprises a fixed core 3 which is at least partially embedded in the membrane body 2 and fluid side, ie. towards the pump room, completely covered by the membrane body 2.
- the core 3 On the side facing away from the fluid, the core 3 has a connection device 4, which is operatively connected to the drive of the diaphragm pump for deflecting the pump diaphragm 1 along the longitudinal axis A.
- the core 3 is made in one piece from a thermoplastic material which forms adhesive bonds with the elastic membrane body 2 made of rubber covalent bonds.
- the thermoplastic material may be a polyamide 612 or a polyphenylene ether, in particular poly-2,6-dimethyl-1,4-phenylene ether, which is covalent bonds with peroxide-crosslinked rubber, preferably peroxidically crosslinked ethylene-propylene-diene rubber (EPDM) received.
- EPDM peroxidically crosslinked ethylene-propylene-diene rubber
- a silicone rubber or fluoro-silicone rubber MVQ / FMQV
- a polybutylene terephthalate PBT
- the core 3 comprises an anchoring plate 5, which is at least partially covered by the membrane body 2 on the fluid-remote side.
- the core 3 further comprises a pin 7, and the connection device 4 is not arranged directly in the anchoring plate 5 but at the fluid-remote end of the pin. 7
- connection device 4 as a separate part, for. B. in the form of a threaded insert, fixed in the core.
- the core 7 may also be formed polygonal at the fluid remote end, so that he is festschraub bar with a fork bowl on a drive rod.
- the pump membrane 1 can be produced by injection molding, for example by a two-component injection molding process, in which first the solid core 3 and subsequently the membrane body 2 are injected become.
- a metallic connection device 4 for example in the form of a threaded insert, be molded directly with the core material.
- Fig. 3 and Fig. 4 show a perspective exploded view of the fluid-remote side, respectively. the fluid-facing side of the fixed core 3.
- Fig. 5 shows a perspective, partially sectional view of the pump membrane 1 from FIGS. 1 and 2 with the core of FIG. 3 and 4.
- the anchoring plate 5 has an inner ring of a plurality of inner through holes 51 disposed about the longitudinal axis A. As shown in FIG. 2 and in FIG. 5, the inner passage openings 51 for the mechanical anchoring of the core 3 in the membrane body 2 each have a circumferential shoulder, so that they are narrowed on the fluid side. The inner passage openings 51 of the anchoring plate 5 are completely felt in the finished pump membrane 1 with the rubber of the membrane body.
- the anchoring plate 5 further on the fluid side facing away from a circumferential groove 52, in which an outer ring of a plurality of outer through-holes 53 is arranged.
- the outer wall 54 of the groove 52 has a small height, the inner wall 55 of the groove 52, so that in the finished pump membrane 1, the membrane body 2 encloses the peripheral edge of the anchoring plate 5 with its outer wall 54 and the groove 52 completely fills together with the outer through holes 53.
- the core 3 has a fluid side, a central opening 31, which forms a blind hole together with the connection device.
- this blind hole is also filled with the rubber of the membrane body 2.
- the described structures of the core 2 (through holes, groove, blind hole) all lead to an enlargement of the connecting surface between the core 3 and membrane body 2, which leads to a much more durable and stronger attachment of the core 3 in the membrane body 2 in particular in the chemical anchoring described above. 1 pump diaphragm
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01282/16A CH712963A1 (de) | 2016-09-29 | 2016-09-29 | Pumpenmembran für eine Membranpumpe zur Förderung eines Fluides. |
PCT/EP2017/073841 WO2018060034A1 (de) | 2016-09-29 | 2017-09-21 | Pumpenmembran |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3519696A1 true EP3519696A1 (de) | 2019-08-07 |
EP3519696B1 EP3519696B1 (de) | 2020-11-04 |
Family
ID=57233257
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17772683.3A Active EP3519696B1 (de) | 2016-09-29 | 2017-09-21 | Pumpenmembran |
Country Status (4)
Country | Link |
---|---|
US (1) | US10900478B2 (de) |
EP (1) | EP3519696B1 (de) |
CH (1) | CH712963A1 (de) |
WO (1) | WO2018060034A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN208934890U (zh) * | 2018-10-27 | 2019-06-04 | 东莞市茗创优尚电子科技有限公司 | 一种弹性膜片式泵体 |
DE102020125567A1 (de) * | 2020-09-30 | 2022-03-31 | Ulman Dichtungstechnik Gmbh | Verbundmembran für Membranpumpen |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29612117U1 (de) | 1996-07-11 | 1996-09-12 | ASF THOMAS Industries GmbH, 82178 Puchheim | Membrane für eine Membranpumpe |
DE19829084B4 (de) * | 1998-06-30 | 2005-01-13 | Prominent Dosiertechnik Gmbh | Membranpumpe |
DE10058274A1 (de) * | 2000-11-23 | 2002-05-29 | Alfa Laval Flow Gmbh | Membran mit strukturierter Oberfläche |
DE10323059A1 (de) | 2003-05-20 | 2004-12-09 | Prominent Dosiertechnik Gmbh | Sensormembran |
EP1892414B1 (de) | 2006-07-21 | 2009-10-21 | ULMAN Dichtungstechnik GmbH | Verbundmembran |
DE102010009670B4 (de) * | 2010-02-27 | 2013-09-19 | Knf Neuberger Gmbh | Membranpumpe |
US8496451B2 (en) | 2010-06-21 | 2013-07-30 | Wilden Pump And Engineering Llc | Pump diaphragm |
US10422331B2 (en) * | 2016-08-12 | 2019-09-24 | Ingersoll-Rand Company | One piece diaphragm |
-
2016
- 2016-09-29 CH CH01282/16A patent/CH712963A1/de unknown
-
2017
- 2017-09-21 US US16/337,474 patent/US10900478B2/en active Active
- 2017-09-21 EP EP17772683.3A patent/EP3519696B1/de active Active
- 2017-09-21 WO PCT/EP2017/073841 patent/WO2018060034A1/de unknown
Also Published As
Publication number | Publication date |
---|---|
EP3519696B1 (de) | 2020-11-04 |
US10900478B2 (en) | 2021-01-26 |
US20190226469A1 (en) | 2019-07-25 |
CH712963A1 (de) | 2018-03-29 |
WO2018060034A1 (de) | 2018-04-05 |
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