EP0733802B1 - Pompe à membrane façonnée - Google Patents

Pompe à membrane façonnée Download PDF

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Publication number
EP0733802B1
EP0733802B1 EP96101648A EP96101648A EP0733802B1 EP 0733802 B1 EP0733802 B1 EP 0733802B1 EP 96101648 A EP96101648 A EP 96101648A EP 96101648 A EP96101648 A EP 96101648A EP 0733802 B1 EP0733802 B1 EP 0733802B1
Authority
EP
European Patent Office
Prior art keywords
ribs
stabilising
diaphragm
radial
underside
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
Application number
EP96101648A
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German (de)
English (en)
Other versions
EP0733802A1 (fr
Inventor
Heinz Riedlinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KNF Neuberger GmbH
Original Assignee
KNF Neuberger GmbH
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Filing date
Publication date
Application filed by KNF Neuberger GmbH filed Critical KNF Neuberger GmbH
Publication of EP0733802A1 publication Critical patent/EP0733802A1/fr
Application granted granted Critical
Publication of EP0733802B1 publication Critical patent/EP0733802B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to a diaphragm pump with a Form membrane made of elastic material in its central area is reinforced in the stroke direction and flexible around it Has ring area, the outside with a clamping edge on Pump housing is held, which shaped membrane by means of a connecting rods attacking their central area or the like Lifting device from an upper to a lower dead center position and can be reversely deflected, in particular that of the pump chamber facing membrane top in the central area and the adjacent Wall of the pump chamber are geometrically adapted to each other and on the underside of the membrane facing away from the pump chamber, at least in Ring area radial ribs are provided for stabilization.
  • Such a diaphragm pump is already known from DE 40 07 932 C2, in which the wall of the pump chamber facing the molded membrane is approximately spherical in its central region and the molded membrane in its associated central area geometrically on the top of this spherical pump chamber area is adjusted so that the shaped membrane with its top in the top dead center position at least in its central area at least almost completely on the wall of the pump room hugs. So that during the pumping in the mold membrane occurring flexing work can be kept as small as possible and the diaphragm pump is still sufficient during the delivery stroke Has suction volume, is the ring area of the molded membrane comparatively thin and flexible, during the Central area is reinforced in the stroke direction to at Stroke to achieve a kind of piston effect.
  • the previously known diaphragm pump has radial ribs on the underside of the ring area. that should stabilize it.
  • the radial ribs are spaced as far apart from each other arranged that the membrane in the ring area is sufficient Flexibility, there is too much bulging of the ring area, so that at low suction pressures the volumetric Efficiency and the pumping speed of the pump accordingly is reduced. It can also cause vibrations in the membrane occur, on the one hand, to a heating of the molded membrane lead and on the other hand also an abutment of the molded membrane on the adjacent pump room wall. A toast the form membrane on the pump chamber wall is mainly because of this undesirable as this leads to increased noise also leads to premature wear of the molded membrane. Particles which have been removed from the shaped membrane can also be the Function of the intake and exhaust valves affect what the Quality of the vacuum that can be achieved with the diaphragm pump reduced.
  • the stabilizing ribs are either aligned in the circumferential direction, that is to say arranged concentrically to the longitudinal axis of the membrane, or that they are aligned tangentially to the circumferential direction or somewhat obliquely to the circumferential direction, for example spirally.
  • the ring area of the shaped membrane is supported both by the radial ribs and by the stabilizing ribs running transversely to it.
  • the radial ribs can therefore be arranged at a sufficiently large distance from one another, so that there is a particularly flexible ring area which causes only comparatively little flexing work when the pump is in operation.
  • the membrane areas lying between the radial ribs are thus supported in the circumferential direction by the stabilizing ribs.
  • the stabilizing ribs are thus arranged in such a way that the ring area of the molded membrane is flexible around a circumferential line, but has a comparatively great bending stiffness in a direction running transverse to it. This results in a smoothly actuated molded membrane, which converts only a very small proportion of the lifting energy applied into flexing work, and which nevertheless prevents vibrations and an impact on the molded membrane at top dead center on the adjacent pump chamber wall.
  • the molded membrane has a longer service life and, on the other hand, the action of the valves of the membrane pump is not so quickly impaired by membrane particles rubbed off the molded membrane. It is also advantageous that the slight arching of the ring area during the suction or lifting movement improves the volumetric efficiency and the pumping speed of the diaphragm pump, particularly at low pressures.
  • the diaphragm pump according to the invention is therefore particularly suitable for use as a vacuum pump.
  • the stabilizing ribs enable a significant reduction in the deformation of the membrane, especially in the area of the inlet and outlet openings of the pump chamber.
  • An advantageous embodiment provides that between adjacent Radial ribs a plurality of stabilizing ribs offset radially to one another are arranged. The on the ring area below Forces acting under vacuum can then be evenly distributed by the Stabilizing ribs added and over the radial ribs into the pump housing or the central area of the Form membrane are introduced.
  • a further development of the invention provides that the bending moment the radial ribs around a circumferential line of the molding membrane in each case is larger than that of a single stabilization rib by one this intersecting radius of the shaped membrane.
  • the radial ribs are So executed more rigid than the stabilizing ribs, wherein several stabilizing ribs with a common one Interact radial rib and are supported on this.
  • the number of radial ribs can thus be reduced, so that a more flexible by a circumference, but still by one Diameter line results in a comparatively rigid ring area, which despite low flexing work losses even at working pressures good pumping speed in the displacement of just a few millibars enables.
  • the greater bending moment compared to the stabilizing ribs the radial ribs can be achieved particularly simply by that the height of the oriented in the direction of the membrane longitudinal axis Radial ribs is greater than the height of at least one, in particular the stabilization rib arranged on the outside in the radial direction.
  • the Stabilizing ribs in the circumferential direction on the underside of the membrane circulate closed and cross or penetrate the radial ribs.
  • One embodiment provides that the underside of the in Stabilization rib arranged radially on the inside approximately flush connects to the underside of the radial ribs. That for them Rubber material used can then be used during the molding process Vulcanization process better in the corner areas between the Stabilizing and radial ribs flow.
  • the central area has a shoulder on the underside of the membrane that has a preferably step-shaped transition area to Ring area forms.
  • the ring area then stands on the central area of the shaped membrane in the central area despite the reduced in size in this area Membrane diameter a sufficient force transmission area for Available so that the tensile stresses occurring in this area are reduced.
  • the stabilizing ribs and / or the stabilizing protrusions on the other hand seen rectangular cross section in the circumferential direction of the shaped membrane preferred to achieve greater bending stiffness.
  • a particularly advantageous embodiment provides that the central area is narrowed downwards at its bottom and there is preferably approximately frustoconical, that the central area at its bottom essentially has radially-axially arranged stabilizing projections and that this is outward in the radial ribs of the Continue ring area.
  • the from the stabilizing ribs on the radial forces transmitted support forces can then better in the central area are initiated so that a deflection or arching of the ring area in the direction of the pump chamber Applying vacuum to the molded membrane even more effectively is counteracted.
  • a membrane pump designated as a whole by 1 has a shaped membrane 2 made of elastic material, which in its Central area 3 is reinforced in the stroke direction 4 and around this Central area 3 has a flexible ring area 5 around. This is on its outer circumference with a clamping edge 6 on the pump housing between the crankcase 7 and the pump head 8 clamped.
  • a driver core trained molded core 9 vulcanized at its threaded connector 10 attacks a connecting rod 11 with which the shaped membrane 2 from a upper to a lower dead center position and vice versa.
  • the pump head 8 has an inlet channel 12 and an outlet channel 13 for the medium to be pumped or extracted, each in the through the pump wall 14 of the pump head 8 and the Diaphragm top 15 open limited pump chamber 16.
  • the Einund Outlet channels 12, 13 are in a known manner with inclusion Exhaust valves provided for the sake of Clarity are not shown in Figure 1.
  • the pump chamber 16 facing Membrane top 15 in the central area 3 and the adjacent Pump chamber wall 14 geometrically adapted to one another. Both are the pump chamber wall 14, as well as the molded membrane 2 in each case central area spherical.
  • the shaped membrane 2 faces away from the pump chamber 16 Bottom 17 in the ring area 5 a total of 18 evenly over the Circumference of the annular region 5 distributed radial ribs 18 on the are combined with four concentrically and at equal intervals from one another on the underside 17 of the ring area 5 Stabilizing ribs 19.
  • the support ribs 19 enable through the recesses between them, on which the Molded membrane 2 has only a comparatively small wall thickness, a particularly flexible around a circumferential line in the ring area 5 Shaped membrane 2, which is only a very small one during the lifting movement Share of the lifting energy applied in flexing work.
  • the stabilization ribs 19 point around a diameter line a comparatively high bending stiffness, so that under Vacuum the deflection or curvature of the ring area 5 in Direction of the pump chamber 16 is reduced.
  • the diaphragm pump 1 By combining the radial ribs 18 with the circumferential direction extending support ribs 19 has the diaphragm pump 1 in particular improved volumetric at low intake pressures Efficiency that results in greater pumping speed.
  • Figure 5 shows the pumping speed curve 24 of the invention Diaphragm pump 1 in comparison to the pumping speed curve 25 from DE-PS 40 07 932 C2 known membrane pump, the radial ribs 18, but no stabilizing ribs oriented in the circumferential direction 19 has.
  • the pumping speed is shown in liters per hour as a function of the absolute value given in millibars Suction pressure of the diaphragm pump 1.
  • Figure 5 shows that the radial and stabilizing ribs equipped diaphragm pump 1 compared to only radial ribs 18 diaphragm pump especially at suction pressures below of 10 mbar absolutely a significantly improved pumping speed having.
  • the minimum vacuum against which the Diaphragm pump 1 can just suck against the previously known diaphragm pump reduced by about a third.
  • the Diaphragm pump 1 according to the invention is therefore even better as a vacuum pump and can in particular also be used as a backing pump for a Turbo molecular pump can be used.
  • the inner stabilizing rib 19 To make the transition to the thicker compared to the ring area 5 trained trained central area 3, has the inner stabilizing rib 19 to a greater height c than the height b of the outer stabilizing ribs 19. This gives during the lifting movement of the shaped membrane 2 in the transition area between the ring and central area a more even load of the elastic membrane material. If necessary, for the Height of the individual stabilization ribs 19 additional gradations be provided, this height with increasing distance from Central area 3 is getting smaller.
  • the height c is the inner stabilizing ribs 19 are preferably chosen somewhat smaller than the thickness d of the adjacent stabilizing ribs 19 Outer edge of the central area 3.
  • the radial ribs 18 between the inner stabilizing rib 19 and the paragraph 20 bevelled on its underside, so that in this area the height of the radial ribs 18 radially outwards decreases. Between the inner stabilizing rib 19 and the clamping edge 6, however, the radial ribs 18 have one constant rib height.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Claims (14)

  1. Pompe à membrane (1), avec une membrane façonnée (2) en matériau élastique, qui est renforcée dans sa région centrale (3) dans la direction de déplacement (4) et possède tout autour de cette région centrale une région annulaire flexible (5) qui est maintenue extérieurement sur le carter de pompe par un bord de serrage (6), la membrane façonnée (2) pouvant, au moyen d'une bielle (11) ou dispositif de déplacement similaire agissant sur sa région centrale (3), être déviée d'une position de point mort haut dans une position de point mort bas et réciproquement, la face supérieure (15), toumée vers la chambre de pompage (16), de la membrane dans la région centrale (3) et la paroi voisine (14) de la chambre de pompage étant notamment géométriquement adaptées l'une à l'autre, et des nervures radiales (18) étant prévues aux fins de stabilisation sur la face inférieure (17), opposée à la chambre de pompage (16), de la membrane, au moins dans la région annulaire (5), caractérisée en ce qu'au moins une nervure de stabilisation (19) s'étendant essentiellement en direction circonférentielle est disposée entre des nervures radiales voisines (18) sur la face inférieure (17) de la région annulaire (5).
  2. Pompe à membrane selon la revendication 1, caractérisée en ce que plusieurs nervures de stabilisation (19), radialement décalées les uns par rapport aux autres, sont disposées entre des nervures radiales voisines (18).
  3. Pompe à membrane selon la revendication 1 ou 2, caractérisée en ce que le moment de flexion des nervures radiales (18) autour d'une ligne circonférentielle de la membrane façonnée (2) est chaque fois supérieur à celui d'une nervure de stabilisation individuelle (19) autour d'un rayon de la membrane façonnée (2) croisant cette ligne.
  4. Pompe à membrane selon une des revendications 1 à 3, caractérisée en ce que la hauteur (a) des nervures radiales, dans la direction de l'axe longitudinal (21) de la membrane, est supérieure à la hauteur (b) d'au moins une nervure de stabilisation (19), notamment de celle disposée à l'extérieur en direction radiale.
  5. Pompe à membrane selon une des revendications 1 à 4, caractérisée en ce que les nervures de stabilisation (19) s'étendent sur la face inférieure (17) de la membrane en en faisant le tour complet en direction circonférentielle, et croisent les nervures radiales (18).
  6. Pompe à membrane selon une des revendications 1 à 5, caractérisée en ce qu'au moins la nervure de stabilisation (19) de la région annulaire (5) qui est disposée à l'intérieur en direction radiale présente, dans la direction axiale de la membrane façonnée (2), une hauteur (c) supérieure à celle d'au moins une nervure de stabilisation (19) disposée plus à l'extérieur qu'elle.
  7. Pompe à membrane selon une des revendications 1 à 6, caractérisée en ce que la face inférieure de la nervure de stabilisation (19) disposée à l'intérieur en direction radiale se raccorde environ en affleurement à la face inférieure de la nervure radiale (18).
  8. Pompe à membrane selon une des revendications 1 à 7, caractérisée en ce que l'épaisseur (c), dans la direction axiale de la membrane façonnée (2), de la nervure de stabilisation intérieure (19) est environ égale ou légèrement inférieure à l'épaisseur (d) de la région de bord extérieur de la région centrale (3) qui est voisine de cette nervure de stabilisation (19).
  9. Pompe à membrane selon une des revendications 1 à 8, caractérisée en ce que la face inférieure des nervures radiales (18) se raccorde en affleurement à la face inférieure du décrochement (20), et en ce que la hauteur des nervures radiales (18), au moins entre le décrochement (20) et la nervure de stabilisation (19) intérieure en direction radiale, diminue radialement vers l'extérieur.
  10. Pompe à membrane selon une des revendications 1 à 9, caractérisée en ce que la face inférieure des nervures radiales (18) se raccorde à la face inférieure du décrochement (20), et en ce que la hauteur des nervures radiales (18), au moins entre le décrochement (20) et la nervure de stabilisation (19) intérieure en direction radiale, diminue radialement vers l'extérieur.
  11. Pompe à membrane selon une des revendications 1 à 10, caractérisée en ce que les nervures de stabilisation (19), disposées en étant radialement décalées les unes par rapport aux autres de façon équidistante de préférence, forment en direction radiale un profil environ ondulé avec des transitions arrondies entre les nervures de stabilisation individuelles (19).
  12. Pompe à membrane selon une des revendications 1 à 11, caractérisée en ce que la région centrale (3) se rétrécit vers le bas sur sa face inférieure (17) et y présente, de préférence, une forme environ tronconique, en ce que la région centrale (3) présente, sur sa face inférieure (17), des saillies de stabilisation (22) en disposition essentiellement radiale/axiale, et en ce que ces saillies se poursuivent vers l'extérieur par les nervures radiales (18) de la région annulaire (5).
  13. Pompe à membrane selon une des revendications 1 à 12, caractérisée en ce que les nervures de stabilisation (19) et/ou les saillies de stabilisation (22) présentent, considérées dans la direction circonférentielle de la membrane façonnée (2), une section environ rectangulaire.
  14. Pompe à membrane selon une des revendications 1 à 13, caractérisée en ce que les nervures radiales (18) sont disposées en répartition uniforme sur la circonférence de la membrane façonnée (2) en étant décalées d'environ 20° les unes par rapport aux autres, et en ce que quatre nervures de stabilisation (19) radialement décalées les unes par rapport aux autres sont chaque fois prévues entre des nervures radiales voisines (18).
EP96101648A 1995-03-24 1996-02-06 Pompe à membrane façonnée Expired - Lifetime EP0733802B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19510828 1995-03-24
DE19510828A DE19510828C2 (de) 1995-03-24 1995-03-24 Membranpumpe mit einer Formmembran

Publications (2)

Publication Number Publication Date
EP0733802A1 EP0733802A1 (fr) 1996-09-25
EP0733802B1 true EP0733802B1 (fr) 1998-08-26

Family

ID=7757644

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96101648A Expired - Lifetime EP0733802B1 (fr) 1995-03-24 1996-02-06 Pompe à membrane façonnée

Country Status (4)

Country Link
US (1) US5699717A (fr)
EP (1) EP0733802B1 (fr)
JP (1) JPH08261156A (fr)
DE (2) DE19510828C2 (fr)

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DE29612117U1 (de) * 1996-07-11 1996-09-12 ASF THOMAS Industries GmbH, 82178 Puchheim Membrane für eine Membranpumpe
DE19647882A1 (de) * 1996-11-20 1998-05-28 Knf Neuberger Gmbh Membranpumpe
US6067893A (en) * 1998-03-10 2000-05-30 Westinghouse Air Brake Company Ribbed diaphragm
DE19906317C1 (de) * 1999-02-16 2000-10-19 Knf Flodos Ag Sursee Membranpumpe
US6295918B1 (en) * 1999-10-15 2001-10-02 John M. Simmons Suspended diaphragm
DE50112760D1 (de) * 2001-01-02 2007-09-06 Medela Holding Ag Membranpumpe
DE10227193B4 (de) * 2002-06-18 2007-05-10 Ulman Dichtungstechnik Gmbh Verbundmembran für Membranpumpen
DE10227192B4 (de) * 2002-06-18 2009-08-06 Ulman Dichtungstechnik Gmbh Verbundmembran für Membranpumpen
US6748848B1 (en) * 2002-12-11 2004-06-15 Gits Manufacturing Company, Llc Waste gate valve actuator
DE10312899A1 (de) * 2003-03-22 2004-10-07 Knf Neuberger Gmbh Membranpumpe
DE20307457U1 (de) * 2003-05-13 2003-07-31 GEMÜ Gebr. Müller Apparatebau GmbH & Co. KG, 74653 Ingelfingen Druckstück für ein Membranventil
ITTO20070440A1 (it) 2007-06-20 2007-09-19 Giorgio Tosini Coperchio flessibile a tenuta contro gli agenti atmosferici.
US20090001638A1 (en) * 2007-06-28 2009-01-01 Semaan Gilbert A Bellows structure
GB2486848B (en) 2008-05-16 2012-08-08 Joe Santa & Ass Pty Ltd A valve and diaphragm for a pump
DE202008007700U1 (de) * 2008-06-10 2009-10-22 Mann+Hummel Gmbh Handpumpe zum Pumpen von Kraftstoff
CN104791235B (zh) * 2014-01-16 2018-10-26 蔡应麟 隔膜增压泵的减震方法
US20150198154A1 (en) * 2014-01-16 2015-07-16 Ying Lin Cai Vibration-reducing structure for compressing diaphragm pump
CN104791226A (zh) * 2014-01-16 2015-07-22 蔡应麟 隔膜增压泵的减震构造
JP6080080B2 (ja) * 2014-05-20 2017-02-15 蔡応麟 ４圧縮チャンバダイアフラムポンプの振動低減構造
US10173183B2 (en) 2014-09-11 2019-01-08 Flowserve Management Company Diaphragm pump with improved tank recirculation
US9896829B2 (en) 2014-09-12 2018-02-20 Zurn Industries, Llc Flush valve diaphragm
JP6412460B2 (ja) 2015-04-14 2018-10-24 株式会社Ｓｏｋｅｎ 走行路推定装置
TWI659719B (zh) * 2017-02-09 2019-05-21 瑞士商耐斯泰克公司 用於飲料製備模組之薄膜泵
US10677238B2 (en) * 2017-11-08 2020-06-09 Ingersoll-Rand Industrial U.S., Inc. Filled resin layer separated pump housing
US10859540B2 (en) * 2018-08-03 2020-12-08 Chromatography Research Supplies, Inc. Duckbill septum
DE102020126241A1 (de) * 2020-10-07 2022-04-07 Alfmeier Präzision SE Membrananordnung
DE102022212934A1 (de) * 2022-12-01 2024-06-06 Robert Bosch Gesellschaft mit beschränkter Haftung Membranpumpe

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DE4007932A1 (de) * 1990-03-13 1991-09-19 Knf Neuberger Gmbh Membranpumpe mit einer formmembrane
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DE4328559C5 (de) * 1993-08-25 2004-11-25 Knf-Neuberger Gmbh Membranpumpe mit wenigstens zwei Membranen

Also Published As

Publication number Publication date
DE19510828C2 (de) 1998-12-24
DE59600466D1 (de) 1998-10-01
US5699717A (en) 1997-12-23
DE19510828A1 (de) 1996-09-26
JPH08261156A (ja) 1996-10-08
EP0733802A1 (fr) 1996-09-25

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