EP1022465A2 - Membranpumpe mit hydraulisch angetriebener Membran - Google Patents
Membranpumpe mit hydraulisch angetriebener Membran Download PDFInfo
- Publication number
- EP1022465A2 EP1022465A2 EP00100956A EP00100956A EP1022465A2 EP 1022465 A2 EP1022465 A2 EP 1022465A2 EP 00100956 A EP00100956 A EP 00100956A EP 00100956 A EP00100956 A EP 00100956A EP 1022465 A2 EP1022465 A2 EP 1022465A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- membrane
- diaphragm pump
- center
- pump according
- 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.)
- Withdrawn
Links
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
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/06—Pumps having fluid drive
- F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston
-
- 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
- F04B43/0063—Special features particularities of the flexible members bell-shaped 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
- F05C2225/04—PTFE [PolyTetraFluorEthylene]
Definitions
- the invention relates to a diaphragm pump with a hydraulically driven membrane according to the preamble of claim 1.
- the membrane as the central Element fulfills the double function as a static seal and displacer in Form of an elastic pumping chamber wall.
- the static membrane seal is the Basis for the hermetic tightness of diaphragm pumps.
- the membrane also transfers the oscillating stroke movement of a drive to the one to be conveyed Fluid, which not only stimulates pulsation, but also interaction comes about with the fluid masses in the piping system.
- the oscillating movement becomes a Drive element via a hydraulic master, which comprises a hydraulic fluid, transferred to the membrane.
- the hydraulically driven membrane works always pressure balanced and only has to endure deflection stresses.
- Diaphragms for hydraulic diaphragm pumps should be as deformable as possible be as possible between the limits of positive and negative deformation include a lot of volume. However, it can be undesirable come to a local bulge of the membrane. This results in large local ones Alternating bending stresses that lead to material fatigue relatively quickly.
- the invention has for its object a hydraulic diaphragm pump driven membrane of the above Kind of improving so that two competing Conditions for the membrane are met, namely the highest possible on the one hand Deformability that allows the greatest possible during the work movement Volume to cross out, and on the other hand a minimal inclination local buckling during movement.
- the waves are concentric around the center formed around the membrane. This results in a rotationally symmetrical Voltage stress on the membrane during operation.
- the wavelength and / or the amplitude the wave-shaped design of the membrane is variable in the radial direction is.
- the wavelength and / or the amplitude expediently take from the center the membrane increases or increases starting in the radial direction initially increases, reaches a maximum and then decreases (decreases) again.
- a working area of the membrane is provided to support the membrane accordingly limiting support surfaces are provided, at least the hydraulic side Support surface a contact contour for the membrane in its deflected position has, which corresponds essentially to the undulating configuration of the membrane.
- the membrane lies not only with its wave crests, but also over a large part of the contour on the support surfaces. This improves the Support essential, so that the membrane with no damage, with For example, pressure can be pressed against the hydraulic-side support surface or system is.
- the membrane is made, for example, of an at least partially plastomeric or elastic material, especially PTFE or PE.
- the diaphragm pump shown comprises a diaphragm 10, which separates a delivery chamber 12 from a hydraulic chamber 14.
- a piston 16 As a hydraulic drive a piston 16 is provided, which is in operation around a constant piston center position oscillates.
- the piston 16 is, for example, in the piston center position 18 and shown in the front dead center 20.
- the oscillating movement of the piston 16 is applied to the membrane via a hydraulic fluid in the hydraulic space 14 10 transmit a corresponding oscillating movement around the central position running around. In this way, a suction side 22 of the diaphragm pump Fluid sucked in and discharged again on a delivery side 24.
- the hydraulic room 14 is a pressure-limiting pressure relief valve 26 and a Refill valve 28 formed with a snifting valve and having a hydraulic reservoir 30 connected. Furthermore, support surfaces 31, 33 are provided, which form a work space limit the membrane 10 laterally.
- 31 denotes the hydraulic side Support surface and 33 the support surface on the delivery chamber side.
- the configuration is such that at a certain distance R, starting from the center 32 of the membrane, the undulating configuration of the each membrane 10a, 10b, 10c in a radial section a radius of curvature r having. Starting from the center point 32 to a mounting point 34 of the Membrane 10a, 10b, 10c continuously takes the curvature of the respective waves to.
- the height of the waves, ie the Amplitude also increases with increasing center-to-center distance R.
- the wavelength increases with increasing center distance R off.
- the Amplitude with R zu (according to membrane 10b), while simultaneously the wavelength decreases with increasing R (according to membrane 10c).
- Fig. 3 shows a preferred embodiment of the support surfaces 31 and 33, which the Limit the working space of the membrane 10.
- the membrane 10 is analogous to that Membrane 10b shown in FIG. 2.
- the support surfaces 31, 33 have one of the wave-like design of the membrane 10 analog contour, so that the membrane 10 in the fully deflected positions not only with their wave crests abuts the support surfaces 31, 33, but also with an essential part their surface. In this way, the membrane 10 can also with high pressures be pressed against the support surfaces 31, 33 without being damaged.
- the membrane shape described therefore has shaped elements between fatigue due to local buckling and shape-related fatigue.
Abstract
Description
- Fig. 1
- eine Membranpumpe,
- Fig. 2
- verschiedene Ausführungsformen von erfindungsgemäßen Membranformen und
- Fig. 3
- eine bevorzugte Ausführungsform von Stützflächen für die Membran.
Claims (8)
- Membranpumpe mit hydraulisch angetriebener Membran (10; 10a; 10b; 10c), wobei die Membran (10; 10a; 10b; 10c) in radialer Richtung wellenförmig ausgebildet ist,
dadurch gekennzeichnet,
daß die Wellenlänge und/oder die Amplitude der wellenförmigen Ausbildung der Membran (10; 10a; 10b; 10c) in radialer Richtung variabel ausgestaltet ist. - Membranpumpe nach Anspruch 1, dadurch gekennzeichnet, daß die Wellenlänge vom Mittelpunkt (32) der Membran (10; 10a; 10b; 10c) ausgehend in radialer Richtung nach außen zu- oder abnimmt.
- Membranpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Amplitude vom Mittelpunkt (32) der Membran (10; 10a; 10b; 10c) ausgehend in radialer Richtung nach außen zu- oder abnimmt.
- Membranpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Wellen konzentrisch um den Mittelpunkt (32) der Membran (10; 10a; 10b; 10c) herum ausgebildet sind.
- Membranpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß einen Arbeitsraum (12,14) der Membran (10; 10a; 10b; 10c) begrenzende Stützflächen (31, 33) vorgesehen sind, wobei wenigstens die hydraulikseitige Stützfläche (31) eine Anlagekontur für die Membran (10; 10a; 10b; 10c) in deren ausgelenkter Position aufweist, die im wesentlichen der wellenförmigen Ausbildung der ausgelenkten Membran (10; 10a; 10b; 10c) entspricht.
- Membranpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Membran (10; 10a; 10b; 10c) aus einem wenigstens teilweise plastomeren bzw. elastischen Werkstoff, insbesondere PTFE oder PE, hergestellt ist.
- Membranpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß vom Mittelpunkt (32) der Membran (10) ausgehend ab 30% des Außenradius eine Wellenlänge der wellenförmigen Ausbildung 6% bis 13% des Radius beträgt.
- Membranpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß vom Mittelpunkt (32) der Membran (10) ausgehend ab 30% des Außenradius eine Amplitude der wellenförmigen Ausbildung 2% bis 6% des Radius beträgt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19901893 | 1999-01-19 | ||
DE19901893A DE19901893C1 (de) | 1999-01-19 | 1999-01-19 | Membranpumpe mit hydraulisch angetriebener Membran |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1022465A2 true EP1022465A2 (de) | 2000-07-26 |
EP1022465A3 EP1022465A3 (de) | 2000-12-27 |
Family
ID=7894700
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00100956A Withdrawn EP1022465A3 (de) | 1999-01-19 | 2000-01-18 | Membranpumpe mit hydraulisch angetriebener Membran |
Country Status (3)
Country | Link |
---|---|
US (1) | US6327960B1 (de) |
EP (1) | EP1022465A3 (de) |
DE (1) | DE19901893C1 (de) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6824364B2 (en) | 2002-09-20 | 2004-11-30 | Rimcraft Technologies, Inc. | Master/slave pump assembly employing diaphragm pump |
JP2006112620A (ja) * | 2004-09-14 | 2006-04-27 | Aisin Aw Co Ltd | ダイヤフラム、及びそれを備えたソレノイドバルブ |
DE102006044253B3 (de) * | 2006-09-16 | 2008-03-27 | Thomas Magnete Gmbh | Membran und Pumpenkopf für eine hydraulisch angetriebene Membranpumpe |
EP3360519B1 (de) | 2007-11-21 | 2020-11-18 | Smith & Nephew plc | Wundauflage |
GB201015656D0 (en) | 2010-09-20 | 2010-10-27 | Smith & Nephew | Pressure control apparatus |
US8596648B2 (en) | 2010-10-22 | 2013-12-03 | Oshkosh Corporation | Pump for vehicle suspension system |
US9084845B2 (en) | 2011-11-02 | 2015-07-21 | Smith & Nephew Plc | Reduced pressure therapy apparatuses and methods of using same |
CA2867969C (en) | 2012-03-20 | 2020-03-24 | Smith & Nephew Plc | Controlling operation of a reduced pressure therapy system based on dynamic duty cycle threshold determination |
US9427505B2 (en) | 2012-05-15 | 2016-08-30 | Smith & Nephew Plc | Negative pressure wound therapy apparatus |
US20150104336A1 (en) | 2013-10-11 | 2015-04-16 | Checkpoint Fluidic Systems International, Ltd. | Scalable Pumping Mechanism Utilizing Anti-Synchronized Poly-Diaphragm Stack |
EP3218604A4 (de) * | 2014-11-14 | 2018-06-13 | Checkpoint Fluidic Systems International, Ltd. | Mechanismus einer metallsandwichmembranpumpe |
EP3237032A2 (de) | 2014-12-22 | 2017-11-01 | Smith & Nephew PLC | Unterdruckwundtherapievorrichtung und -verfahren |
US9890024B2 (en) | 2016-04-08 | 2018-02-13 | Oshkosh Corporation | Leveling system for lift device |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1572970A (en) * | 1923-12-07 | 1926-02-16 | Taylor Instrument Co | Fluid-pressure diaphragm |
US1927617A (en) * | 1930-01-15 | 1933-09-19 | Schmidt Rudolf | Piston engine or piston pump |
FR787226A (fr) * | 1934-06-13 | 1935-09-19 | Perfectionnement aux compresseurs ou pompes à membrane | |
US2150771A (en) * | 1934-12-17 | 1939-03-14 | Kollsman Paul | Self-compensating aneroid |
GB521273A (en) * | 1938-11-10 | 1940-05-16 | Smith & Sons Ltd S | Improvements in or relating to pressure-sensitive capsules |
US2324701A (en) * | 1939-12-18 | 1943-07-20 | Vickers Inc | Fluid pressure accumulator |
US2698766A (en) * | 1951-11-19 | 1955-01-04 | Cutler Hammer Inc | Pressure responsive power elements |
US2760260A (en) * | 1952-12-17 | 1956-08-28 | Frederick C Melchior | Method of rolling capsules |
US4375182A (en) * | 1980-10-31 | 1983-03-01 | Z John R | Ultra-sensitive diaphragm with dual stress-relief structures |
JPH09286659A (ja) * | 1996-04-22 | 1997-11-04 | Ngk Spark Plug Co Ltd | セラミック製ダイアフラム及びその製造方法 |
DE19631081C1 (de) * | 1996-08-01 | 1997-10-09 | Helmut Heidrich | Membrane mit großer Haltbarkeit |
US6145430A (en) * | 1998-06-30 | 2000-11-14 | Ingersoll-Rand Company | Selectively bonded pump diaphragm |
-
1999
- 1999-01-19 DE DE19901893A patent/DE19901893C1/de not_active Expired - Fee Related
-
2000
- 2000-01-18 EP EP00100956A patent/EP1022465A3/de not_active Withdrawn
- 2000-01-19 US US09/487,246 patent/US6327960B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
None |
Also Published As
Publication number | Publication date |
---|---|
EP1022465A3 (de) | 2000-12-27 |
DE19901893C1 (de) | 2000-06-15 |
US6327960B1 (en) | 2001-12-11 |
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