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DE19631081C1 - Heavy-duty diaphragm with concentric grooves and ridges - Google Patents

Heavy-duty diaphragm with concentric grooves and ridges

Info

Publication number
DE19631081C1
DE19631081C1 DE1996131081 DE19631081A DE19631081C1 DE 19631081 C1 DE19631081 C1 DE 19631081C1 DE 1996131081 DE1996131081 DE 1996131081 DE 19631081 A DE19631081 A DE 19631081A DE 19631081 C1 DE19631081 C1 DE 19631081C1
Authority
DE
Germany
Prior art keywords
membrane
grooves
diaphragm
ridges
bulges
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 - Fee Related
Application number
DE1996131081
Other languages
German (de)
Inventor
Helmut Heidrich
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.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE1996131081 priority Critical patent/DE19631081C1/en
Application granted granted Critical
Publication of DE19631081C1 publication Critical patent/DE19631081C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009Special features
    • F04B43/0054Special features particularities of the flexible members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J3/00Diaphragms; Bellows; Bellows pistons
    • F16J3/02Diaphragms

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Diaphragms And Bellows (AREA)

Abstract

The weakening grooves are formed in the top surface of the diaphragm, facing away from the fluid medium being handled, while the ridges are formed on the bottom surface, facing towards the medium. The grooves (2) join via sharp edges onto the top surface of the diaphragm, while the ridges are opposite their lowermost points. On actuating the diaphragm its top side is distorted more markedly, the groove edges being pressed against each other. This counteracts buckling of the material. The ridges (4) on the underside protrude only slightly. Flat corrugations (3) can be formed on the top surface, joining onto the grooves via sharp edges.

Description

Es ist bekannt, daß Membranen, besonders wenn sie bei aggressivem Medium in Pumpen eingebaut sind, oft nicht lange halten. Bei Industriepumpen reißen oder brechen sie häufig und können Folgeschäden verursachen. Daher wird versucht, durch eine besondere Membranformgebung, bestimmte Werk­ stoffe, zum Beispiel Gummigemisch oder spezielle Stößel die Haltbarkeit zu vergrößern. Viele Membranen haben glatte Flächen und sind gewölbt. Durch die Betätigung des Stößels wird bei ihnen die Wölbung verringert beziehungsweise die Membrane abgeflacht, folglich wird auch mehr oder weniger der Membranquerschnitt beziehungsweise die Membranfläche verringert. Dabei wird das Material gleichzeitig gebogen und gestaucht.It is known that membranes, especially when they are aggressive medium are installed in pumps, often not for long hold. With industrial pumps, they often tear or break and can cause consequential damage. Therefore it tries through a special membrane shape, certain movement substances, for example rubber mixture or special pestles Increase durability. Many membranes have smooth ones Surfaces and are arched. By operating the plunger the curvature is reduced or the Membrane flattened, consequently more or less the membrane cross-section or the membrane area decreased. The material is bent at the same time and compressed.

Der im Patentanspruch angegebenen Erfindung liegt das Problem zugrunde, Membranen haltbarer zu machen.The invention specified in the claim is Underlying the problem of making membranes more durable.

Dieses Problem wird durch die im Patentanspruch aufgeführ­ ten Merkmale einer besonderen Formgebung der Membrane zur Verringerung der Werkstoffbeanspruchung gelöst.This problem is outlined in the claim Characteristics of a special shape of the membrane Reduction in material stress solved.

Die mit der Erfindung erzielte vorteilhafte Wirkung kommt dadurch zustande, daß die Membrane zwar gebogen, aber bedeutend weniger gestaucht wird. Durch die Reduzierung dieses einen Beanspruchungsmerkmals erhält die Membrane eine große Haltbarkeit.The advantageous effect achieved with the invention comes because the membrane is bent, but is significantly less compressed. By reducing the membrane receives this one stress characteristic great durability.

Bei der Betätigung des Stößels wird die Membranwölbung zwar auch abgeflacht, die Stauchung jedoch von den auf der Oberseite vorhandenen kreisrunden Rillen weitgehend kompen­ siert. Jede dieser kreisrunden Rillen hat einen anderen Radius, dabei jedoch haben alle den Mittelpunkt der Membrane. Diese Rillen haben Kanten und werden beim Betätigen der Membrane beidseitig zusammengedrückt und somit verkleinert, wodurch eine Kompensation erfolgt. Gleichzeitig treten auf der dem Medium zugewandten Membran­ seite unterhalb dieser Rillen, ähnlich wie bei Unterwellen, die schwachen Wölbungen hervor. Sie lassen sich jedoch nicht wie die Wellen bei wellenförmigen Membranen zuein­ ander drücken, weil die durch die Rillen entstandenen kantigen quasi Oberwellen im Profil stärker ausgelegt sind. Es entstehen also wie bei wellenförmigen Membranen auf der Unterseite keine tieferen Wellentäler oder quasi kreis­ förmige Rillen. Bei entsprechendem Medium ist dieses zum Vorteil. Beim Betätigen wird die Membranoberseite stärker, die Membranunterseite weniger stark verändert. Der dicke Querschnitt der kantigen quasi Oberwellen gibt der Membrane zwar Stabilität, jedoch darf die Membranstärke auf der Unterseite bei den ringförmigen Wölbungen nicht zu gering sein, damit die Membrane nicht instabil wird. Der äußere abgewinkelte ringförmige Rand dient zur Auflage. Durch diese Form wird die Membrane gut biegsam, behält aber ihre Gesamtstabilität.When the tappet is actuated, the diaphragm bulges Although also flattened, the compression of those on the To a large extent compensate for the existing circular grooves on the top siert. Each of these circular grooves has a different one Radius, but all have the center of the Membrane. These grooves have edges and are used in the Pressing the diaphragm on both sides and  thus reduced in size, whereby compensation takes place. At the same time occur on the membrane facing the medium side below these grooves, similar to sub-waves, the faint bulges. However, you can not like the waves in wavy membranes press the other one because the grooves angular quasi-harmonics are designed stronger in profile. As with wavy membranes, it is created on the Underside no deeper troughs or quasi circle shaped grooves. With the appropriate medium, this is for Advantage. When pressed, the top of the membrane becomes stronger, the underside of the membrane changed less. The thick Cross section of the angular quasi harmonics gives the membrane Although stability, the membrane thickness on the The underside of the ring-shaped arches is not too small so that the membrane does not become unstable. The outer angled ring-shaped edge serves as a support. By this shape makes the membrane flexible, but retains its shape Overall stability.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird folgend näher beschrieben.An embodiment of the invention is in the drawing shown and will be described in more detail below.

Es zeigenShow it

Fig. 1 einen Querschnitt der Seitenansicht mit dem Stößel­ befestigungsloch 1, den oberseitigen kantigen Rillen 2, dem quasi Oberwellen ähnelnden aber kantigen Teilbereich 3, den unterseitigen ringför­ migen Wölbungen 4, dem Auflageteil 5; Figure 1 is a cross section of the side view with the tappet mounting hole 1 , the top-sided edged grooves 2 , the quasi-similar but edgy portion 3 , the underside ringför shaped curvatures 4 , the support part 5 .

Fig. 2 eine Draufsicht. Fig. 2 is a plan view.

Claims (4)

1. Membrane mit großer Haltbarkeit, mit konzentrischen Rillen auf der dem Medium abgewandten Oberseite und mit konzentrischen Wölbungen auf der dem Medium zugewandten Unterseite, dadurch gekennzeichnet, daß die Rillen (2) mit kantigen Übergängen in der Oberfläche der Membrane angeordnet sind und die Wölbungen (4) den tiefsten Punkten der Rillen (2) gegenüberliegen, wobei beim Betätigen der Membrane die Oberseite stärker verändert wird und die Rillen (2) beidseitig mit ihren Kanten zusammengedrückt werden und damit die Materialstauchung kompensieren, während die Wölbungen (4) auf der Unterseite nur schwach hervortreten.1. Membrane with great durability, with concentric grooves on the top facing away from the medium and with concentric bulges on the bottom facing the medium, characterized in that the grooves ( 2 ) are arranged with angular transitions in the surface of the membrane and the bulges ( 4 ) opposite the deepest points of the grooves ( 2 ), whereby when the membrane is actuated, the top is changed more strongly and the grooves ( 2 ) are pressed together with their edges on both sides and thus compensate for the material compression, while the bulges ( 4 ) on the underside only to emerge weakly. 2. Membrane nach Anspruch 1, dadurch gekennzeichnet, daß auf der Oberseite flache Oberwellen (3) gebildet werden, die zu den Rillen (2) hin mit kantigen Übergängen ausgestattet sind und die aufgrund fehlender Oberwellenspitzen ein stärkeres Profil aufweisen, so daß bei einer Betätigung der Membrane die Oberseite stärker verändert wird als die Unterseite.2. Membrane according to claim 1, characterized in that flat harmonics ( 3 ) are formed on the top, which are equipped with angular transitions to the grooves ( 2 ) and which have a stronger profile due to the lack of harmonic peaks, so that when actuated the top of the membrane is changed more than the bottom. 3. Membrane nach Anspruch 1, dadurch gekennzeichnet, daß ein äußerer abgewinkelter ringförmiger Rand (5) zur Befestigungsauflage dient.3. Membrane according to claim 1, characterized in that an outer angled annular edge ( 5 ) is used for the mounting support. 4. Membrane nach Anspruch 1, dadurch gekennzeichnet, daß sich im Zentrum der Membrane eine Anordnung (1) zur Aufnahme eines Befestigungsstößels befindet.4. Membrane according to claim 1, characterized in that there is an arrangement ( 1 ) for receiving a mounting plunger in the center of the membrane.
DE1996131081 1996-08-01 1996-08-01 Heavy-duty diaphragm with concentric grooves and ridges Expired - Fee Related DE19631081C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1996131081 DE19631081C1 (en) 1996-08-01 1996-08-01 Heavy-duty diaphragm with concentric grooves and ridges

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1996131081 DE19631081C1 (en) 1996-08-01 1996-08-01 Heavy-duty diaphragm with concentric grooves and ridges

Publications (1)

Publication Number Publication Date
DE19631081C1 true DE19631081C1 (en) 1997-10-09

Family

ID=7801500

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1996131081 Expired - Fee Related DE19631081C1 (en) 1996-08-01 1996-08-01 Heavy-duty diaphragm with concentric grooves and ridges

Country Status (1)

Country Link
DE (1) DE19631081C1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19901893C1 (en) * 1999-01-19 2000-06-15 Ott Kg Lewa Hydraulically-driven membrane pump has membrane with concentric waves preventing localized bulging and damage, whilst assuring maximum volumetric efficiency
WO2000049293A1 (en) 1999-02-16 2000-08-24 Knf Flodos Ag Diaphragm pump
DE20215127U1 (en) 2002-10-01 2002-12-05 FESTO AG & Co., 73734 Esslingen membrane actuator

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE875744C (en) * 1948-12-11 1953-05-07 Henschel & Sohn G M B H Sealing membrane for bearing lubrication chambers
DE2406134A1 (en) * 1973-02-12 1974-09-05 Gates Rubber Co FLEXIBLE SHELL-SHAPED MEMBRANE
DE2361261A1 (en) * 1973-12-08 1975-06-12 Daimler Benz Ag Roll diaphragm for pressure accumulators - has hemispherical shape with ring-shaped reinforcement at edges
US4238992A (en) * 1978-10-30 1980-12-16 Wilden Pump & Engineering Co. Pump diaphragm
DE4323856A1 (en) * 1992-07-24 1994-01-27 Huber+Suhner Ag Fibre-reinforced membrane for separating two chambers with different pressures - has comparatively high breaking tension with raised modulus to reduce proportion of fibrous material.
DE4312538A1 (en) * 1993-04-17 1994-10-20 Continental Ag Pot or roll membrane
DE29505021U1 (en) * 1995-03-24 1995-05-18 Knf-Neuberger Gmbh, 79112 Freiburg Diaphragm pump with a shaped membrane
JPH07167299A (en) * 1993-12-16 1995-07-04 Kazuo Sugimura Vessel for wave pattern type diaphragm

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE875744C (en) * 1948-12-11 1953-05-07 Henschel & Sohn G M B H Sealing membrane for bearing lubrication chambers
DE2406134A1 (en) * 1973-02-12 1974-09-05 Gates Rubber Co FLEXIBLE SHELL-SHAPED MEMBRANE
DE2361261A1 (en) * 1973-12-08 1975-06-12 Daimler Benz Ag Roll diaphragm for pressure accumulators - has hemispherical shape with ring-shaped reinforcement at edges
US4238992A (en) * 1978-10-30 1980-12-16 Wilden Pump & Engineering Co. Pump diaphragm
EP0010943B1 (en) * 1978-10-30 1984-09-05 Jr. Alan Dean Tuck Fluid pressure-driven diaphragm pump
DE4323856A1 (en) * 1992-07-24 1994-01-27 Huber+Suhner Ag Fibre-reinforced membrane for separating two chambers with different pressures - has comparatively high breaking tension with raised modulus to reduce proportion of fibrous material.
DE4312538A1 (en) * 1993-04-17 1994-10-20 Continental Ag Pot or roll membrane
JPH07167299A (en) * 1993-12-16 1995-07-04 Kazuo Sugimura Vessel for wave pattern type diaphragm
DE29505021U1 (en) * 1995-03-24 1995-05-18 Knf-Neuberger Gmbh, 79112 Freiburg Diaphragm pump with a shaped membrane

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19901893C1 (en) * 1999-01-19 2000-06-15 Ott Kg Lewa Hydraulically-driven membrane pump has membrane with concentric waves preventing localized bulging and damage, whilst assuring maximum volumetric efficiency
WO2000049293A1 (en) 1999-02-16 2000-08-24 Knf Flodos Ag Diaphragm pump
DE19906317C1 (en) * 1999-02-16 2000-10-19 Knf Flodos Ag Sursee Diaphragm pump
JP2002537520A (en) * 1999-02-16 2002-11-05 カー エヌ エフ フロードス アクチエンゲゼルシャフト Diaphragm pump
DE20215127U1 (en) 2002-10-01 2002-12-05 FESTO AG & Co., 73734 Esslingen membrane actuator

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Legal Events

Date Code Title Description
8100 Publication of the examined application without publication of unexamined application
D1 Grant (no unexamined application published) patent law 81
8322 Nonbinding interest in granting licenses declared
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee