EP1175563A1 - Membranpumpe mit einer durch die membrane gesteuerten einlassöffnung - Google Patents
Membranpumpe mit einer durch die membrane gesteuerten einlassöffnungInfo
- Publication number
- EP1175563A1 EP1175563A1 EP00931084A EP00931084A EP1175563A1 EP 1175563 A1 EP1175563 A1 EP 1175563A1 EP 00931084 A EP00931084 A EP 00931084A EP 00931084 A EP00931084 A EP 00931084A EP 1175563 A1 EP1175563 A1 EP 1175563A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- membrane
- pump
- inlet opening
- inlet
- diaphragm
- 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
- 239000012528 membrane Substances 0.000 title claims abstract description 69
- 238000013459 approach Methods 0.000 claims abstract description 7
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000005086 pumping Methods 0.000 description 10
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000002028 premature 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
- F04B43/028—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms with in- or outlet valve arranged in the plate-like flexible member
Definitions
- the invention relates to a diaphragm pump according to the type of the main claim.
- a diaphragm pump according to the preamble of claim 1 is known from utility model G 9406216.
- the diaphragm pump resulting from this utility model has a diaphragm which can be actuated by a crank drive and which is fastened to an outer diaphragm ring on a pump body of a pump housing.
- the membrane In addition to the outer membrane circular ring, the membrane has a membrane core which is connected to the outer membrane circular ring via an elastically deformable membrane ring.
- the membrane With a pump body surface formed on the pump body, the membrane encloses a pump chamber (scoop chamber).
- An inlet channel and an outlet channel are formed in the pump body and open into the pump body surface at an inlet opening and an outlet opening.
- the inlet channel and the outlet channel are preferably connected to flow direction valves outside of the pump body, as a result of which a direction of flow through the inlet channel and the outlet channel is predetermined.
- a disadvantage of the diaphragm pump known from utility model G 9406216 is that part of what is in the pump chamber during the ejection stroke
- Exhaust opening is throttled depending on the stroke position of the crank drive, the throttling increasing before reaching the top dead center position of the crank drive s, so that at the end of the exhaust stroke the highly compressed pump medium can escape increasingly poorly.
- the known diaphragm pump in the known diaphragm pump, a quantity of pump medium corresponding to the compression ratio of the diaphragm pump cannot be completely ejected from the pump chamber via the outlet opening.
- the known diaphragm pump is only suitable to a limited extent for compressible pumping medium such as gases.
- the present invention is based on the object of proposing a diaphragm pump which avoids the disadvantages in the prior art and permits the highest possible compression ratio of the pump medium located in the pump chamber.
- the membrane pump according to the invention has the advantage that the inlet opening of the inlet channel is already closed during the exhaust stroke of the crank drive, so that a further compression of a pump medium takes place only in the pump chamber and the pump medium can be completely ejected via the outlet channel.
- the center of the inlet opening lies at least approximately in the plane of rotation of the crank of the crank drive.
- the inlet opening of the inlet channel is closed particularly early.
- the elastically deformable membrane ring closes the inlet opening when the crank drive is in the crank rotational position, which is up to 90 ° before the top dead center position.
- a seal is achieved from a maximum deflection of the diaphragm of the diaphragm pump.
- the elastically deformable membrane ring closes the inlet opening at a crank rotational position of the crank mechanism, which is 20 ° to 90 ° before the top dead center position.
- a crank rotational position of the crank mechanism which is 20 ° to 90 ° before the top dead center position.
- a valve plate is arranged in a region of the inlet opening of the inlet channel to form a directional valve.
- the valve plate By arranging the valve plate directly at the inlet opening of the inlet channel, the dead volume of the inlet channel can be further reduced. It is particularly advantageous that the Center axis of the inlet channel is oriented perpendicular to the pump body surface. This simplifies the structural design of the directional valve and the introduction of the valve plate into the inlet channel.
- the outlet opening of the outlet channel is arranged in a region of the pump body surface which the membrane approaches last and which is reached by the membrane at the earliest at the top dead center position of the crank drive. It is thereby achieved that the pump medium can be pumped out of the pump chamber into the outlet channel as freely as possible. In addition, it is achieved that the outlet opening of the outlet channel is not closed before reaching the top dead center position of the crank drive.
- the center of the outlet opening of the outlet channel is arranged in an inner region of the pump body surface, which lies opposite the membrane core of the membrane. Since, during the crank movement of the crank drive, the pump medium is finally pumped out from an area of the pump chamber arranged above the membrane core of the membrane due to the movement of the membrane core, the outlet opening of the outlet channel is thereby arranged particularly favorably.
- FIG. 1 shows an axial section through an exemplary embodiment of a diaphragm pump according to the invention in the top dead center position of the crank drive;
- Figure 2 shows the embodiment in a crank rotational position, which is 50 ° after the top dead center position;
- FIG. 3 shows the embodiment in the bottom dead center position; and FIG. 4 shows the exemplary embodiment with a crank position of the crank drive which is 50 ° before the top dead center position.
- FIG. 1 shows an excerpted sectional view of a diaphragm pump 1 according to the invention.
- the diaphragm pump 1 can be used in particular as a vacuum pump or as a pressure pump for conveying pump media, e.g. Liquids and gases.
- pump media e.g. Liquids and gases.
- the diaphragm pump 1 according to the invention is also suitable for other applications.
- the diaphragm pump 1 has a pump body 2 which is connected to a housing element 3.
- the pump body 2 has an inlet channel 4, which in this Embodiment is formed by stepped bores 5a, 5b, 5c and an oblique bore 6.
- a central axis 7 of the oblique bore 6 of the inlet channel 4 is oriented perpendicular to a pump body surface 8 formed on the pump body 2.
- the inlet channel 4 opens into the pump body surface 8 at an inlet opening 9.
- the inlet opening 9 is arranged in an outer region of the pump chamber, ie in the vicinity of the clamping of the membrane in the pump body 2. Furthermore, the center of the inlet opening 9 advantageously lies in the rotation or swivel plane of the crank 31 of the crank drive 32.
- the swivel plane of the crank 31 corresponds to the sectional plane of FIG.
- the arrangement of the inlet opening in an outer region of the pump chamber and in the pivoting plane of the crank 31 results in an early closing of the inlet opening 9 when the pump medium is expelled from the pump chamber through the membrane.
- the pump medium is no longer conveyed via the inlet channel 4 into the pump chamber from the early closing of the inlet opening 9. From this point on, the inlet channel is no longer effective as a harmful area. This therefore improves and optimizes the pumping process.
- the inlet valve In the area of the inlet opening 9, ie directed towards the pump chamber, a direction or Inlet valve arranged.
- the inlet valve consists of a valve plate 10 which is arranged in the region of the inlet opening 9 of the inlet channel 4 to form the directional valve or inlet valve.
- the oblique bore 6 of the pump body 2 In the area of the inlet opening 9, the oblique bore 6 of the pump body 2 has a circumferential pocket directed towards the pump chamber, which pocket has a larger diameter than the oblique bore 6.
- the valve plate 10 is supported on a peripheral edge 11 formed between the oblique bore 6 and the pocket.
- the valve plate 10 is essentially aligned with the pump body surface 8, at least while it is being closed by the membrane, a control edge 35 being produced between the circumferential groove in the oblique bore 6 and the pump body surface 8.
- a peripheral control edge 35 is formed in the edge region of the inlet opening 9 and extends slightly beyond the valve plate, on which the membrane closes the inlet opening 9.
- the circumferential control edge 35 advantageously ensures that the inlet valve with the valve plate 10 is securely and reliably closed on all sides during the outlet stroke.
- an outlet element 16 is screwed onto a thread 15, which has stepped bores 18a to 18d which, together with an outlet recess 19, form an outlet channel 17.
- the outlet element 16 can also be inserted and fastened by screws.
- the outlet channel 17 opens into an outlet opening 20 in the pump body surface 8.
- a directional valve is formed by means of a valve plate 21.
- the outlet valve with the valve plate 21 is arranged in the region of the outlet recess 19 towards the pump chamber, whereby a further improvement in the pumping effect is achieved.
- the outlet opening 20 is arranged offset from the edge of the pump chamber towards the center in such a way that the outlet opening 20 is closed as late as possible during the outlet stroke. In other words, the outlet opening 20 is arranged in a region which is covered by the membrane at the end of the outlet stroke last.
- Both the inlet valve with the valve plate 10 and the outlet valve with the valve plate 21 are advantageously designed as freely movable valves which switch at the smallest possible pressure differences in order not to cause any compression losses and thus an indirect increase in the displacement.
- the valves are not preloaded in any direction by clamping or connection, which would require additional forces to switch the valves, but are designed to be freely movable.
- a correspondingly designed valve holding device is provided so that the valves are returned to their respective seat as stress-free as possible after lifting off their valve seat, ie after opening, when the flow process ends.
- the clamping of the valve plates 10 and 21 are free of tension, ie in the vicinity of the closed valve position the valve is as free of tension as possible, so that small pressure differences are sufficient for closing or opening.
- tensions develop in the valve, which preload it in the direction of the closed position.
- two bolts with a thin retaining collar are provided on both sides of the inlet opening 9 for the inlet valve.
- the inlet valve has elongated or oval mounting holes through which the bolts protrude. When the valve is opened, the valve plate is thus movable along the bores and allows it to be bent out into the pump chamber.
- the bore 18d is a preferably circumferential groove, which is formed in the outlet element 16 towards the seat of the valve plate 21 and enables the valve plate 21 to move freely from the pump chamber.
- the diaphragm has a diaphragm core 25, an elastically deformable diaphragm ring 26 and an outer diaphragm circular ring 27, the diaphragm 24 being fastened to the outer diaphragm circular ring 27 between the pump body 2 and the housing element 3.
- the membrane is essentially flat in the non-clamped state and is clamped between the pump body 2 and the housing element 3 in such a way that the membrane is prestressed in the direction of the pump body surface 8.
- the membrane is clamped tangentially-globular, as can be seen in FIGS. 1 to 4.
- the concave pump body surface 8 is also continued in the area of the clamping of the diaphragm ring 27, so that the diaphragm rests at least in the outer area, ie in the area of the diaphragm ring 27, at the edge areas of the concave pump body surface 8. This also ensures a reliable closing of the inlet valve by the membrane.
- the tangential-global clamping of the diaphragm avoids the flat annular damage space usually present in known pumps in the area of the diaphragm clamping, which results from insufficient flexibility of the diaphragm and the pressure build-up in the pump during the discharge process and consequently the bulging of the diaphragm away from the pump chamber.
- the diaphragm pump according to the invention is designed so that the compression ratio, ie the ratio of maximum to minimum pump chamber volume, is optimized. Since the compression ratio depends in particular on the minimum achievable pump chamber volume and is therefore determined by how well the elastic membrane can close off the pump chamber, an optimization is achieved in this regard by the properties of the membrane pump according to the invention described above.
- a molded core 28 is vulcanized into the membrane core 25 of the membrane 24 and has a plate-shaped section 29 and a cylindrical section 30.
- the cylindrical section 30 of the mandrel 28 is connected to a crank 31 of a crank drive 32 via a connecting device 31.
- a peripheral control edge 35 is formed in the edge region of the inlet opening 9, on which the elastically deformable membrane ring 26 closes the inlet opening 9.
- FIGS. 2 to 4 show the exemplary embodiment of the diaphragm pump from FIG. 1 with different crank rotational positions of the crank drive.
- the continuous examination of FIGS. 1 to 4 gives an impression of the sequence of movements of the diaphragm pump 1.
- 1 is the Crank rotary position of the diaphragm pump at an upper dead center, in FIG. 2 50 ° after the upper dead center, in FIG. 3 at the lower dead center and in FIG. 5 50 ° before an upper dead center. Since the elements shown in FIGS. 2 to 4 correspond to the elements from FIG. 1, a repeated description is omitted.
- FIG. 2 shows the crank rotational position of the crank drive 32 after the crank drive 32 has been rotated in a direction of rotation 36 by 50 °.
- the axis 37 of the diaphragm core 25 is tilted relative to the axis 39 of the concave pump body surface 8.
- the membrane core 25 initially lifts off from the pump body surface 8 on the side of the inlet opening 9, wherein it initially remains in contact with the pump body surface 8 in the region of the outlet opening 20.
- the inlet opening 9 of the inlet channel 4 is closed by the elastically deformable membrane ring 26 of the membrane 24 in the crank rotational position shown in FIG.
- the membrane ring 26 and / or the pump body surface 8 can also be designed such that the inlet opening 9 of the inlet channel 4 is already open when the crank drive 32 is in the crank position shown in FIG.
- the inlet opening 9 of the inlet channel 4 is open when the crank drive 32 is in a cranked position, which is 90 ° after the top dead center position.
- the diaphragm 24 lifts off from the pump body surface 8 due to the rotary crank movement of the crank drive 32, as a result of which a pump space 38 formed between the diaphragm 24 and the pump body surface 8 enlarges and, from the opening of the inlet opening 9 of the inlet duct 4, a pump medium from the inlet duct 4 through the Inlet opening 9 is sucked into the pump chamber 38.
- the pump medium flows through the directional valve formed by the valve plate 10.
- a directional valve is formed in the outlet channel 17 by the valve plate 21, so that a pump medium on the side of the sealing plate 21 facing away from the outlet opening 20 does not flow back into the pump chamber 38 during the suction stroke of the crank drive 32.
- the diaphragm pump 1 is shown at a bottom dead center position of the crank drive 32.
- the crank drive 32 of the diaphragm pump 1 has made a rotation in the direction of rotation 36 of 180 °. In this position there is an at least approximately maximum volume of the pump chamber 38.
- the membrane 24 is therefore only in the area of the outer membrane ring 27, where it is connected to the pump body 2 and the housing element 3.
- the inlet opening 9 of the inlet channel 4 and the outlet opening 20 of the outlet channel 17 are completely open.
- An ejection stroke of the diaphragm 24 follows the crank rotational position of the diaphragm pump 1 shown in FIG.
- FIG. 4 shows a crank position of the crank drive 32 which is 50 ° before the top dead center position of the crank drive 32 shown in FIG.
- the axis 37 is tilted relative to the axis 39 of the pump body surface 8, the tilting taking place in the opposite direction to the tilting in FIG. 2.
- the membrane 24 first approaches the inlet opening 9 of the inlet channel 4, the inlet opening 9 already being closed by the elastically deformable membrane ring 26 in the rotational angle position of the crank drive 32 shown.
- the pump chamber 38 is widened from the inlet opening to the outlet opening 20 of the outlet channel 17, so that the pumping medium from the pump chamber 38 collects preferably in the region of the outlet opening 20 of the outlet channel 17 during the further rotary movement of the crank drive 32, thereby completely pumping out the Pump medium from the pump chamber 38 into the outlet channel 17.
- the premature closing of the inlet opening 9 of the inlet channel 4 with the diaphragm ring 26 ensures that a dead volume adjoining the pump chamber 38 in the inlet channel 4 is closed, so that a pump medium present in the inlet channel 4 is no longer compressed by the further exhaust stroke of the crank drive and the exhaust stroke can be used completely to compress the pumping medium to be pumped out via the outlet channel 17. It is particularly advantageous if the valve plate 10 is positioned in the inlet channel 4 close to the inlet opening 9, since the dead volume is thereby reduced even before the inlet opening 9 is closed with the membrane ring 26.
- the outlet opening 20 of the outlet channel 17 is arranged in an area of the pump body surface 8 which the membrane 24 approaches last and which is reached by the membrane 24 at the earliest at the top dead center position of the crank drive 32. It is thereby achieved that the outlet opening 20 can only be closed after the exhaust stroke of the crank drive 32 has taken place. So that the outlet opening 20 is not partially closed by the membrane ring 26 of the membrane 24 and thus a pumping medium flow of the pumping medium is not additionally throttled when pumping out into the outlet opening 17, it is particularly advantageous that the center of the outlet opening 20 of the outlet channel 17 in an inner Area of the pump body surface 8 is arranged, which is opposite the membrane core 25 of the membrane 24.
- the invention is not limited to the exemplary embodiment described.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- External Artificial Organs (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19919908A DE19919908B4 (de) | 1999-04-30 | 1999-04-30 | Membranpumpe mit einer durch die Membrane gesteuerten Einlaßöffnung |
DE19919908 | 1999-04-30 | ||
PCT/EP2000/003857 WO2000066891A1 (de) | 1999-04-30 | 2000-04-28 | Membranpumpe mit einer durch die membrane gesteuerten einlassöffnung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1175563A1 true EP1175563A1 (de) | 2002-01-30 |
EP1175563B1 EP1175563B1 (de) | 2003-12-03 |
Family
ID=7906546
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00931084A Expired - Lifetime EP1175563B1 (de) | 1999-04-30 | 2000-04-28 | Membranpumpe mit einer durch die membrane gesteuerten einlassöffnung |
Country Status (5)
Country | Link |
---|---|
US (1) | US6776591B1 (de) |
EP (1) | EP1175563B1 (de) |
AT (1) | ATE255682T1 (de) |
DE (2) | DE19919908B4 (de) |
WO (1) | WO2000066891A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10146190A1 (de) | 2000-09-14 | 2002-04-25 | Jan W Beenker | Verfahren und Maschine zur Förderung von Medien |
US7040869B2 (en) | 2000-09-14 | 2006-05-09 | Jan W. Beenker | Method and device for conveying media |
JP5144253B2 (ja) * | 2004-03-16 | 2013-02-13 | ハーグレーブス テクノロジー コーポレーション | ポンプ密封装置 |
DE102006021535B3 (de) * | 2006-05-08 | 2007-09-13 | Vacuubrand Gmbh + Co Kg | Vakuumpumpe |
US8187227B2 (en) | 2006-11-01 | 2012-05-29 | Medela Holding Ag | Self returning contamination barrier |
EP2362840A1 (de) * | 2008-09-26 | 2011-09-07 | Arb Greenpower, Llc | Hybrides energieumwandlungssystem |
US8287249B2 (en) | 2008-12-19 | 2012-10-16 | Gardner Denver Thomas, Inc. | Two-stage membrane pump with economical inlet port design |
US8017409B2 (en) | 2009-05-29 | 2011-09-13 | Ecolab Usa Inc. | Microflow analytical system |
DE202010002145U1 (de) | 2010-02-09 | 2011-09-07 | Vacuubrand Gmbh + Co Kg | Membranvakuumpumpe |
US10330094B2 (en) * | 2013-08-26 | 2019-06-25 | Blue-White Industries, Ltd. | Sealing diaphragm and methods of manufacturing said diaphragm |
CN110578683B (zh) * | 2018-06-08 | 2021-09-21 | 科际精密股份有限公司 | 隔膜泵及其阀片 |
CN112955655A (zh) * | 2019-05-17 | 2021-06-11 | 伊鲁米纳公司 | 用于与流体盒一起使用的线性蠕动泵 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2605957A (en) * | 1945-06-20 | 1952-08-05 | Junius W Houston | Pumping apparatus |
FR1149743A (fr) * | 1956-05-09 | 1957-12-31 | Compresseur à membrane et à manivelle de commande, plus particulièrement pour installations de refroidissement | |
DE2212322A1 (de) * | 1972-03-15 | 1973-09-20 | Erich Becker | Membranpumpe zur druck- oder vakuumerzeugung |
US3947156A (en) * | 1972-03-08 | 1976-03-30 | Erich Becker | Diaphragm pump, particularly for the generation of vacuum |
DE2742139C2 (de) * | 1977-09-19 | 1980-08-21 | Erich 7812 Bad Krozingen Becker | Membranpumpe |
DE2802900A1 (de) * | 1978-01-24 | 1979-07-26 | Erich Becker | Membranpumpe |
DE4119228C2 (de) * | 1991-06-14 | 1995-04-13 | Knf Neuberger Gmbh | Membranpumpe |
DE4200838C2 (de) * | 1992-01-15 | 1994-12-22 | Knf Neuberger Gmbh | Pumpe mit vom Fördermedium gesteuerten Ventilen |
DE4412668C2 (de) * | 1994-04-13 | 1998-12-03 | Knf Flodos Ag | Pumpe |
DE9406216U1 (de) | 1994-04-14 | 1994-09-22 | Knf-Neuberger Gmbh, 79112 Freiburg | Membranpumpe mit einer Formmembran |
-
1999
- 1999-04-30 DE DE19919908A patent/DE19919908B4/de not_active Expired - Lifetime
-
2000
- 2000-04-28 US US10/018,596 patent/US6776591B1/en not_active Expired - Lifetime
- 2000-04-28 DE DE50004653T patent/DE50004653D1/de not_active Expired - Fee Related
- 2000-04-28 AT AT00931084T patent/ATE255682T1/de not_active IP Right Cessation
- 2000-04-28 EP EP00931084A patent/EP1175563B1/de not_active Expired - Lifetime
- 2000-04-28 WO PCT/EP2000/003857 patent/WO2000066891A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO0066891A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE50004653D1 (de) | 2004-01-15 |
ATE255682T1 (de) | 2003-12-15 |
EP1175563B1 (de) | 2003-12-03 |
US6776591B1 (en) | 2004-08-17 |
DE19919908A1 (de) | 2000-11-23 |
WO2000066891A1 (de) | 2000-11-09 |
DE19919908B4 (de) | 2004-09-23 |
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