EP3715645B1 - Hydropneumatic membrane cylinder - Google Patents

Hydropneumatic membrane cylinder Download PDF

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Publication number
EP3715645B1
EP3715645B1 EP20155287.4A EP20155287A EP3715645B1 EP 3715645 B1 EP3715645 B1 EP 3715645B1 EP 20155287 A EP20155287 A EP 20155287A EP 3715645 B1 EP3715645 B1 EP 3715645B1
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EP
European Patent Office
Prior art keywords
cylinder
diaphragm
piston
piston rod
casing
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EP20155287.4A
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German (de)
French (fr)
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EP3715645A1 (en
Inventor
André BARTEN
Richard Brenner
Fridwald Greiner
Timo LEHRIG
Erhard Quast
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Achenbach Buschhetten GmbH and Co KG
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Achenbach Buschhetten GmbH and Co KG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
    • F15B11/036—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force by means of servomotors having a plurality of working chambers
    • F15B11/0365—Tandem constructions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/10—Characterised by the construction of the motor unit the motor being of diaphragm type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7055—Linear output members having more than two chambers
    • F15B2211/7056—Tandem cylinders

Definitions

  • the present invention relates to a hydropneumatic diaphragm cylinder with a cylinder housing and two diaphragm pistons arranged in a cylinder chamber arrangement, each with a diaphragm extending radially between a cylinder wall and a piston rod unit, the diaphragm pistons being arranged on the piston rod unit in an axially offset manner such that pressure is applied to one diaphragm piston retracting the piston rod unit and pressurizing the other diaphragm piston causes the piston rod unit to extend.
  • Hydropneumatic membrane cylinders of the type mentioned at the outset are used in particular on coilers for cutting and winding systems, with the hydropneumatic membrane cylinders serving to press a contact device provided with contact rollers during winding with a defined contact pressure against a winding bundle formed during the winding process, in order to ensure that the winding is as uniform as possible to allow trained winding diameter. Included Any diameter tolerances of the winding coil must be compensated for by the hydropneumatic diaphragm cylinder.
  • FIG 1 A previously used by the applicant hydropneumatic membrane cylinder, which forms the prior art in the present case, is shown schematically in FIG 1 shown.
  • the known diaphragm cylinder 10 has in a cylinder housing 11 two diaphragm pistons 14 and 15 arranged axially offset from one another in a common cylinder space 12 on a piston rod unit 13 .
  • Right pressure chamber 18 Simultaneously with the pressurization of the in 1 Right pressure chamber 18 is a force relief with simultaneous pressurization of an in 1 left-hand pressure chamber 22, which is formed between a left-hand housing part 23 of the cylinder housing 11 and a membrane 24 of the left-hand membrane piston 14, so that an oil volume arranged in the pressure chamber 22 is displaced through a pressure bore 21, which is also formed parallel to the cylinder axis 19 in an end face of the left-hand housing part 23 becomes.
  • the displacement resistance ensures that the retraction movement of the piston rod unit 13 is dampened right pressure chamber 18 arranged oil volume for a corresponding damping of the extension movement.
  • an axial intermediate space 25 is formed between the membranes 16, 24, which is delimited radially by a housing ring 26, the housing ring 26 forming a connecting part between the housing parts 17 and 23 and peripheral edges 27, 28 of the membranes 16, 24 in each case between a housing part 17, 23 and the housing ring 26 are accommodated.
  • the housing ring 26 has a radial ventilation bore 29 which connects the intermediate space 25 to the environment.
  • the diaphragm pistons 14, 15 or the diaphragms 16, 24 are in the common cylinder chamber 12 and are only spaced apart from one another by the intermediate space 25.
  • the intermediate space 25 can collapse due to the simultaneous pressurization of the left-hand pressure chamber 22 and the right-hand pressure chamber 18, so that the membranes 16, 24 touch one another.
  • the present invention is based on the object of proposing a membrane cylinder which enables the piston rod to move as continuously as possible and excludes mutual contact of the membranes.
  • the diaphragm cylinder according to the invention has the features of claim 1.
  • the hydropneumatic diaphragm cylinder according to the invention has a cylinder chamber arrangement with two cylinder chambers which are arranged separately in the cylinder housing and each accommodate a diaphragm piston.
  • the spatial separation of the diaphragm pistons according to the invention prevents the diaphragms of the diaphragm pistons from being pressurized via an intermediate pneumatic volume, so that, in contrast to the known diaphragm cylinder, the diaphragms of the diaphragm cylinder according to the invention are pneumatically decoupled. A mutual pneumatic influence of the membranes is therefore excluded.
  • an intermediate piston rod piece is formed between the membrane pistons, which intermediate piece penetrates through an intermediate cylinder wall separating the cylinder chambers.
  • the intermediate cylinder wall is preferably designed as part of a housing flange, the housing flange having an annular flange arranged on the intermediate cylinder wall for connection to two housing parts arranged on a common cylinder axis with the housing flange.
  • diaphragms of the diaphragm pistons are each accommodated with a peripheral edge between the annular flange and a housing part for connection to the cylinder wall, two separate ones can be used despite the different design of the cylinder housing Cylinder spaces conventionally designed membranes, as are known from the prior art, are used.
  • the pressure is applied to the diaphragm pistons in two adjacent pressure chambers, which are axially delimited by the intermediate cylinder wall and one diaphragm piston each, so that due to the correspondingly matching design of the pressure chambers on both sides of the partition wall, a correspondingly matching pressure surface of the diaphragm pistons is made possible, and identical during a retraction and extension movement Forces act on the diaphragm piston.
  • the intermediate piston rod piece has a different diameter than a piston rod part of the piston rod unit that is led out of the cylinder housing, so that the intermediate piston rod piece has a smaller diameter than the piston rod part that is led out of the cylinder housing, and the pressure area can thus be increased to increase the tensile or compressive forces transmitted through the piston rod unit the diaphragm piston can be made larger, regardless of the diameter of the piston rod part that is led out.
  • a cylinder wall section radially delimiting the respective pressure chamber is preferably provided with a radial pressure bore, so that the formation of pressure connections on the axial end faces of the housing parts can be dispensed with.
  • the vent bores can be provided in accordance with the pressure bores in the lateral surface of the cylinder housing.
  • FIG. 2 shows a membrane cylinder 30, which has two separately designed cylinder spaces 33, 34 in a cylinder housing 31 to form a cylinder space arrangement 32.
  • a diaphragm piston 36 , 37 arranged on a piston rod unit 35 is accommodated in each of the cylinder chambers 33 , 34 , the diaphragm pistons 36 , 37 being spaced apart from one another by a piston rod intermediate piece 47 and each having a diaphragm 38 , 39 .
  • an intermediate cylinder wall 40 is provided between them, which is designed as part of a housing flange 41, which is arranged on a common cylinder axis 42 with housing parts 43, 44, and via an annular flange 45 designed on the housing flange 41 the housing parts 43, 44 is connected.
  • the membranes 38, 39 of the membrane pistons 36, 37 are each arranged with a peripheral edge between the annular flange 45 and the respective annular flange 45 adjacent housing part 43, 44.
  • the pressurization of the diaphragm pistons 36, 37 takes place in two adjacent pressure chambers 49, 50, which are axially delimited by the intermediate cylinder wall 40 and one diaphragm piston 36, 37 each, with the pressurization in 2 left pressure chamber 49 is provided with a pressure bore 51, which is arranged in a cylinder wall section 52 of a cylinder wall 60 radially delimiting the pressure chamber 49, and for pressurizing the in 2 right pressure chamber 50, a pressure chamber 50 radially delimiting cylinder wall section 53 is provided with a pressure bore 54.
  • the cylinder wall sections 52 and 53 are formed by the annular flange 45 of the housing flange 41 .
  • a pressurization of the in 2 Left-hand pressure chamber 49 causes the piston rod unit 35 to move in and pressurization of the pressure chamber 50 causes the piston rod unit 35 to move out.
  • the housing parts 43, 44 are each provided with a radial ventilation bore 58, 59.
  • the diameter d1 of the piston rod intermediate piece 47 can be selected to be smaller than the diameter d2 of the protruding piston rod part 47, so that increased piston forces can be achieved.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Damping Devices (AREA)
  • Actuator (AREA)
  • Vehicle Body Suspensions (AREA)

Description

Die vorliegende Erfindung betrifft einen hydropneumatischen Membranzylinder mit einem Zylindergehäuse und zwei in einer Zylinderraumanordnung angeordneten Membrankolben mit jeweils einer sich radial zwischen einer Zylinderwand und einer Kolbenstangeneinheit erstreckenden Membran, wobei die Membrankolben axial versetzt an der Kolbenstangeneinheit angeordnet sind, derart, dass eine Druckbeaufschlagung des einen Membrankolbens ein Einfahren der Kolbenstangeneinheit und eine Druckbeaufschlagung des anderen Membrankolbens ein Ausfahren der Kolbenstangeneinheit bewirkt.The present invention relates to a hydropneumatic diaphragm cylinder with a cylinder housing and two diaphragm pistons arranged in a cylinder chamber arrangement, each with a diaphragm extending radially between a cylinder wall and a piston rod unit, the diaphragm pistons being arranged on the piston rod unit in an axially offset manner such that pressure is applied to one diaphragm piston retracting the piston rod unit and pressurizing the other diaphragm piston causes the piston rod unit to extend.

Hydropneumatische Membranzylinder der eingangs genannten Art werden insbesondere an Aufhaspeln von Schneid- und Wickelanlagen eingesetzt, wobei die hydropneumatischen Membranzylinder dazu dienen, eine mit Kontaktwalzen versehene Kontakteinrichtung während des Aufwickelns mit einer definierten Anpresskraft gegen einen sich beim Wickelvorgang ausbildenden Wickelbund zu drücken, um einen möglichst gleichmäßig ausgebildeten Wickeldurchmesser zu ermöglichen. Dabei müssen auftretende Durchmessertoleranzen des Wickelbundes dämpfend durch den hydropneumatischen Membranzylinder ausgeglichen werden.Hydropneumatic membrane cylinders of the type mentioned at the outset are used in particular on coilers for cutting and winding systems, with the hydropneumatic membrane cylinders serving to press a contact device provided with contact rollers during winding with a defined contact pressure against a winding bundle formed during the winding process, in order to ensure that the winding is as uniform as possible to allow trained winding diameter. Included Any diameter tolerances of the winding coil must be compensated for by the hydropneumatic diaphragm cylinder.

Ferner ist aus der US 3 838 630 A ein Membranzylinder bekannt.Furthermore, from the U.S. 3,838,630 A a diaphragm cylinder is known.

Ein bislang von der Anmelderin eingesetzter hydropneumatischer Membranzylinder, der im vorliegenden Fall den Stand der Technik bildet, ist schematisch in der Fig. 1 dargestellt. Der bekannte Membranzylinder 10 weist in einem Zylindergehäuse 11 zwei in einem gemeinsamen Zylinderraum 12 axial zueinander versetzt an einer Kolbenstangeneinheit 13 angeordnete Membrankolben 14 und 15 auf.A previously used by the applicant hydropneumatic membrane cylinder, which forms the prior art in the present case, is shown schematically in FIG 1 shown. The known diaphragm cylinder 10 has in a cylinder housing 11 two diaphragm pistons 14 and 15 arranged axially offset from one another in a common cylinder space 12 on a piston rod unit 13 .

In Fig. 1 befindet sich die Kolbenstangeneinheit 13 in Arbeitsstellung. Zur Überführung der Kolbenstangeneinheit 13 in ihre eingefahrene Position wird eine zwischen einer Membran 16 und einem in Fig. 1 rechten Gehäuseteil 17 ausgebildete Druckkammer 18 durch eine parallel zu einer Zylinderachse 19 in einer Stirnfläche des Gehäuseteils 17 verlaufende Druckbohrung 20 mit Hydrauliköl beaufschlagt, wobei das Hydrauliköl über einen hier nicht näher dargestellten Druckwandler außerhalb des Zylindergehäuses 11 mit pneumatischen Druck beaufschlagt wird.In 1 the piston rod unit 13 is in the working position. To move the piston rod unit 13 into its retracted position, a diaphragm 16 and an in 1 hydraulic oil is applied to the pressure chamber 18 formed on the right-hand housing part 17 through a pressure bore 20 running parallel to a cylinder axis 19 in an end face of the housing part 17, with the hydraulic oil being subjected to pneumatic pressure via a pressure converter outside of the cylinder housing 11, which is not shown in detail here.

Gleichzeitig mit der Druckbeaufschlagung der in Fig. 1 rechten Drucckammer 18 erfolgt eine Kraftentlastung bei gleichzeitiger Druckbeaufschlagung einer in Fig. 1 linken Druckkammer 22, die zwischen einem linken Gehäuseteil 23 des Zylindergehäuses 11 und einer Membran 24 des linken Membrankolbens 14 ausgebildet ist, sodass ein in der Drucckammer 22 angeordnetes Ölvolumen durch eine ebenfalls parallel zur Zylinderachse 19 in einer Stirnfläche des linken Gehäuseteils 23 ausgebildete Druckbohrung 21 verdrängt wird. Dabei sorgt der Verdrängungswiderstand für eine Dämpfung der Einfahrbewegung der Kolbenstangeneinheit 13. Ein Ausfahren der Kolbenstange 13 aus dem Zylindergehäuse 11 erfolgt analog durch eine höhere Druckbeaufschlagung der linken Drucckammer 22, wobei dann in diesem Fall die Verdrängung eines in der rechten Druckkammer 18 angeordneten Ölvolumens für eine entsprechende Dämpfung der Ausfahrbewegung sorgt.Simultaneously with the pressurization of the in 1 Right pressure chamber 18 is a force relief with simultaneous pressurization of an in 1 left-hand pressure chamber 22, which is formed between a left-hand housing part 23 of the cylinder housing 11 and a membrane 24 of the left-hand membrane piston 14, so that an oil volume arranged in the pressure chamber 22 is displaced through a pressure bore 21, which is also formed parallel to the cylinder axis 19 in an end face of the left-hand housing part 23 becomes. The displacement resistance ensures that the retraction movement of the piston rod unit 13 is dampened right pressure chamber 18 arranged oil volume for a corresponding damping of the extension movement.

Wie Fig. 1 weiter zeigt, ist zwischen den Membranen 16, 24 ein axialer Zwischenraum 25 ausgebildet, der radial durch einen Gehäusering 26 begrenzt wird, wobei der Gehäusering 26 ein Verbindungsteil zwischen den Gehäuseteilen 17 und 23 ausbildet und Umfangsränder 27, 28 der Membranen 16, 24 jeweils zwischen einem Gehäuseteil 17, 23 und dem Gehäusering 26 aufgenommen sind. Darüber hinaus weist der Gehäusering 26 eine radiale Entlüftungsbohrung 29 auf, die den Zwischenraum 25 mit der Umgebung verbindet.How 1 further shows, an axial intermediate space 25 is formed between the membranes 16, 24, which is delimited radially by a housing ring 26, the housing ring 26 forming a connecting part between the housing parts 17 and 23 and peripheral edges 27, 28 of the membranes 16, 24 in each case between a housing part 17, 23 and the housing ring 26 are accommodated. In addition, the housing ring 26 has a radial ventilation bore 29 which connects the intermediate space 25 to the environment.

Bei dem bekannten, in Fig. 1 dargestellten Membranzylinder 10 befinden sich die Membrankolben 14, 15 beziehungsweise die Membranen 16, 24 in dem gemeinsamen Zylinderraum 12 und sind lediglich durch den Zwischenraum 25 voneinander beabstandet. In der Praxis hat sich nun herausgestellt, dass es aufgrund der unmittelbar benachbarten Anordnung der Membranen 16, 24, die innerhalb des Zylinderraums 13 nur durch den mit Luft gefüllten Zwischenraum 25 voneinander beabstandet sind, insbesondere in einer Mittellage der Membrankolben 14, 15 zwischen der eingefahrenen Stellung und der ausgefahrenen Stellung der Kolbenstangeneinheit 13, zu einer gegenseitigen Beeinflussung der Membranen 17, 24 kommen kann, die zu Unstetigkeiten bei einer Einfahrbewegung oder Ausfahrbewegung der Kolbenstange im Bereich der Kolbenmittellage führen kann. Insbesondere kann durch die gleichzeitige Druckbeaufschlagung der linken Druckkammer 22 und der rechten Druckkammer 18 der Zwischenraum 25 kollabieren, sodass die Membranen 16, 24 einander berühren.At the well-known, in 1 In the diaphragm cylinder 10 shown, the diaphragm pistons 14, 15 or the diaphragms 16, 24 are in the common cylinder chamber 12 and are only spaced apart from one another by the intermediate space 25. In practice, it has now been found that due to the immediately adjacent arrangement of the membranes 16, 24, which are only spaced apart from one another within the cylinder chamber 13 by the air-filled intermediate space 25, in particular in a middle position of the membrane pistons 14, 15 between the retracted Position and the extended position of the piston rod unit 13, a mutual influence of the membranes 17, 24 can occur, which can lead to discontinuities in a retraction movement or extension movement of the piston rod in the middle position of the piston. In particular, the intermediate space 25 can collapse due to the simultaneous pressurization of the left-hand pressure chamber 22 and the right-hand pressure chamber 18, so that the membranes 16, 24 touch one another.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Membranzylinder vorzuschlagen, der eine möglichst stetige Verfahrbewegung der Kolbenstange ermöglicht und einen gegenseitigen Kontakt der Membranen ausschließt.The present invention is based on the object of proposing a membrane cylinder which enables the piston rod to move as continuously as possible and excludes mutual contact of the membranes.

Zur Lösung dieser Aufgabe weist der erfindungsgemäße Membranzylinder die Merkmale des Anspruchs 1 auf.To solve this problem, the diaphragm cylinder according to the invention has the features of claim 1.

Der erfindungsgemäße hydropneumatische Membranzylinder weist eine Zylinderraumanordnung mit zwei getrennt im Zylindergehäuse angeordneten Zylinderräumen auf, die jeweils einen Membrankolben aufnehmen.The hydropneumatic diaphragm cylinder according to the invention has a cylinder chamber arrangement with two cylinder chambers which are arranged separately in the cylinder housing and each accommodate a diaphragm piston.

Die erfindungsgemäße räumliche Trennung der Membrankolben verhindert, dass sich die Membranen der Membrankolben über ein zwischenliegendes pneumatisches Volumen mit Druck beaufschlagen können, sodass im Gegensatz zu dem bekannten Membranzylinder die Membranen des erfindungsgemäßen Membranzylinders pneumatisch entkoppelt sind. Eine gegenseitige pneumatische Beeinflussung der Membranen ist daher ausgeschlossen.The spatial separation of the diaphragm pistons according to the invention prevents the diaphragms of the diaphragm pistons from being pressurized via an intermediate pneumatic volume, so that, in contrast to the known diaphragm cylinder, the diaphragms of the diaphragm cylinder according to the invention are pneumatically decoupled. A mutual pneumatic influence of the membranes is therefore excluded.

Bei dem hydropneumatischen Membranzylinder ist zur pneumatischen Entkopplung der Membranen vorgesehen, zwischen den Membrankolben ein Kolbenstangenzwischenstück auszubilden, das eine die Zylinderräume trennende Zylinderzwischenwand durchdringt.In the case of the hydropneumatic membrane cylinder, for the purpose of pneumatic decoupling of the membranes, an intermediate piston rod piece is formed between the membrane pistons, which intermediate piece penetrates through an intermediate cylinder wall separating the cylinder chambers.

Vorzugsweise ist die Zylinderzwischenwand als Bestandteil eines Gehäuseflansches ausgebildet, wobei der Gehäuseflansch zur Verbindung mit zwei auf einer gemeinsamen Zylinderachse mit dem Gehäuseflansch angeordneten Gehäuseteilen einen an der Zylinderzwischenwand angeordneten Ringflansch aufweist. Somit wird trotz der voneinander getrennten Anordnung der Zylinderräume, die jeweils einen Membrankolben aufnehmen, eine insgesamt kompakte Ausbildung des Membranzylinders ermöglicht.The intermediate cylinder wall is preferably designed as part of a housing flange, the housing flange having an annular flange arranged on the intermediate cylinder wall for connection to two housing parts arranged on a common cylinder axis with the housing flange. Thus, despite the separate arrangement of the cylinder chambers, each of which accommodates a diaphragm piston, an overall compact design of the diaphragm cylinder is made possible.

Wenn die Membranen der Membrankolben zur Verbindung mit der Zylinderwand jeweils mit einem Umfangsrand zwischen dem Ringflansch und einem Gehäuseteil aufgenommen sind, können trotz der abweichenden Ausgestaltung des Zylindergehäuses mit zwei voneinander getrennten Zylinderräumen konventionell ausgestaltete Membranen, wie sie aus dem Stand der Technik bekannt sind, verwendet werden.If the diaphragms of the diaphragm pistons are each accommodated with a peripheral edge between the annular flange and a housing part for connection to the cylinder wall, two separate ones can be used despite the different design of the cylinder housing Cylinder spaces conventionally designed membranes, as are known from the prior art, are used.

Die Druckbeaufschlagung der Membrankolben erfolgt in zwei benachbarten, durch die Zylinderzwischenwand und jeweils einen Membrankolben axial begrenzten Druckkammern, sodass aufgrund der entsprechend übereinstimmenden Ausgestaltung der Druckkammern zu beiden Seiten der Zwischenwand eine entsprechend übereinstimmende Druckfläche der Membrankolben ermöglicht wird, und bei einer Einfahr- und Ausfahrbewegung identische Kräfte auf die Membrankolben wirken.The pressure is applied to the diaphragm pistons in two adjacent pressure chambers, which are axially delimited by the intermediate cylinder wall and one diaphragm piston each, so that due to the correspondingly matching design of the pressure chambers on both sides of the partition wall, a correspondingly matching pressure surface of the diaphragm pistons is made possible, and identical during a retraction and extension movement Forces act on the diaphragm piston.

Das Kolbenstangenzwischenstück weist einen von einem aus dem Zylindergehäuse herausgeführten Kolbenstangenteil der Kolbenstangeneinheit abweichenden Durchmesser auf, sodass das Kolbenstangenzwischenstück einen kleineren Durchmesser als der aus dem Zylindergehäuse herausgeführte Kolbenstangenteil aufweist, und somit kann zur Erzielung einer Erhöhung der durch die Kolbenstangeneinheit übertragenen Zug- oder Druckkräfte die Druckfläche der Membrankolben unabhängig vom Durchmesser des herausgeführten Kolbenstangenteils größer ausgebildet werden.The intermediate piston rod piece has a different diameter than a piston rod part of the piston rod unit that is led out of the cylinder housing, so that the intermediate piston rod piece has a smaller diameter than the piston rod part that is led out of the cylinder housing, and the pressure area can thus be increased to increase the tensile or compressive forces transmitted through the piston rod unit the diaphragm piston can be made larger, regardless of the diameter of the piston rod part that is led out.

Vorzugsweise ist zur Druckbeaufschlagung der Druckkammern ein die jeweilige Druckkammer radial begrenzender Zylinderwandabschnitt mit einer radialen Druckbohrung versehen, sodass auf die Ausbildung von Druckanschlüssen an den axialen Stirnflächen der Gehäuseteile verzichtet werden kann.For pressurizing the pressure chambers, a cylinder wall section radially delimiting the respective pressure chamber is preferably provided with a radial pressure bore, so that the formation of pressure connections on the axial end faces of the housing parts can be dispensed with.

Wenn zur Entlüftung von jeweils axial durch die Membranen von den Druckkammern getrennten Entlüftungskammern die Gehäuseteile jeweils mit einer radialen Entlüftungsbohrung versehen sind, können die Entlüftungsbohrungen übereinstimmend mit den Druckbohrungen in der Mantelfläche des Zylindergehäuses vorgesehen werden.If the housing parts are each provided with a radial vent bore for venting vent chambers axially separated from the pressure chambers by the membranes, the vent bores can be provided in accordance with the pressure bores in the lateral surface of the cylinder housing.

Nachfolgend wird eine bevorzugte Ausführungsform des hydropneumatischen Membranzylinders anhand der Zeichnung näher erläutert.A preferred embodiment of the hydropneumatic diaphragm cylinder is explained in more detail below with reference to the drawing.

Es zeigen:

Fig. 1
einen hydropneumatischen Membranzylinder gemäß dem Stand der Technik;
Fig. 2
eine Ausführungsform des erfindungsgemäßen hydropneumatischen Membranzylinders.
Show it:
1
a prior art hydropneumatic diaphragm cylinder;
2
an embodiment of the hydropneumatic membrane cylinder according to the invention.

Fig. 2 zeigt einen Membranzylinder 30, der in einem Zylindergehäuse 31 zur Ausbildung einer Zylinderraumanordnung 32 zwei separat ausgebildete Zylinderräume 33, 34 aufweist. In den Zylinderräumen 33, 34 ist jeweils ein auf einer Kolbenstangeneinheit 35 angeordneter Membrankolben 36, 37 aufgenommen, wobei die Membrankolben 36, 37 durch ein Kolbenstangenzwischenstück 47 voneinander beabstandet sind und jeweils eine Membran 38, 39 aufweisen. 2 shows a membrane cylinder 30, which has two separately designed cylinder spaces 33, 34 in a cylinder housing 31 to form a cylinder space arrangement 32. A diaphragm piston 36 , 37 arranged on a piston rod unit 35 is accommodated in each of the cylinder chambers 33 , 34 , the diaphragm pistons 36 , 37 being spaced apart from one another by a piston rod intermediate piece 47 and each having a diaphragm 38 , 39 .

Zur Ausbildung der voneinander getrennten Zylinderräume 33, 34 ist zwischen diesen eine Zylinderzwischenwand 40 vorgesehen, die als Bestandteil eines Gehäuseflansches 41 ausgebildet ist, der auf einer gemeinsamen Zylinderachse 42 mit Gehäuseteilen 43, 44 angeordnet ist, und über einen am Gehäuseflansch 41 ausgebildeten Ringflansch 45 mit den Gehäuseteilen 43, 44 verbunden ist. Zur Verbindung mit dem Zylindergehäuse 31 sind die Membranen 38, 39 der Membrankolben 36, 37 jeweils mit einem Umfangsrand zwischen dem Ringflansch 45 und dem jeweils dem Ringflansch 45 benachbarten Gehäuseteil 43, 44 angeordnet.To form the separate cylinder chambers 33, 34, an intermediate cylinder wall 40 is provided between them, which is designed as part of a housing flange 41, which is arranged on a common cylinder axis 42 with housing parts 43, 44, and via an annular flange 45 designed on the housing flange 41 the housing parts 43, 44 is connected. For connection to the cylinder housing 31, the membranes 38, 39 of the membrane pistons 36, 37 are each arranged with a peripheral edge between the annular flange 45 and the respective annular flange 45 adjacent housing part 43, 44.

Wie Fig. 2 zeigt, ist der in Fig. 2 linke Membrankolben 36 am Ende des Kolbenstangenzwischenstücks 47 der Kolbenstangeneinheit 35 angeordnet, das die Zylinderzwischenwand 40 durchdringt, und der in Fig. 2 rechte Membrankolben 37 ist am Ende eines Kolbenstangenteils 46 angeordnet, der aus dem Gehäuseteil 44 herausgeführt ist. Das Kolbenstangenzwischenstück 47 ist gegenüber dem herausgeführten Kolbenstangenteil 46 im Durchmesser d1 reduziert und der Membrankolben 37 befindet sich an einem Kolbenstangenbund 48 im Übergang zwischen dem Kolbenstangenzwischenstück 47 und dem herausgeführten Kolbenstangenteil 46.How 2 shows is the in 2 left diaphragm piston 36 is arranged at the end of the intermediate piston rod piece 47 of the piston rod unit 35, which penetrates the intermediate cylinder wall 40, and the in 2 The right diaphragm piston 37 is arranged at the end of a piston rod part 46 which is led out of the housing part 44. The piston rod intermediate piece 47 is opposite the led-out piston rod part 46 is reduced in diameter d 1 and the diaphragm piston 37 is located on a piston rod collar 48 in the transition between the intermediate piston rod piece 47 and the piston rod part 46 that extends out.

Die Druckbeaufschlagung der Membrankolben 36, 37 erfolgt in zwei benachbarten, durch die Zylinderzwischenwand 40 und jeweils einen Membrankolben 36, 37 axial begrenzten Druckkammern 49, 50, wobei zur Druckbeaufschlagung die in Fig. 2 linke Druckkammer 49 mit einer Druckbohrung 51 versehen ist, die in einem die Druckkammer 49 radial begrenzenden Zylinderwandabschnitt 52 einer Zylinderwand 60 angeordnet ist, und zur Druckbeaufschlagung der in Fig. 2 rechten Druckkammer 50 ein die Druckkammer 50 radial begrenzender Zylinderwandabschnitt 53 mit einer Druckbohrung 54 versehen ist. Die Zylinderwandabschnitte 52 und 53 werden durch den Ringflansch 45 des Gehäuseflansches 41 ausgebildet.The pressurization of the diaphragm pistons 36, 37 takes place in two adjacent pressure chambers 49, 50, which are axially delimited by the intermediate cylinder wall 40 and one diaphragm piston 36, 37 each, with the pressurization in 2 left pressure chamber 49 is provided with a pressure bore 51, which is arranged in a cylinder wall section 52 of a cylinder wall 60 radially delimiting the pressure chamber 49, and for pressurizing the in 2 right pressure chamber 50, a pressure chamber 50 radially delimiting cylinder wall section 53 is provided with a pressure bore 54. The cylinder wall sections 52 and 53 are formed by the annular flange 45 of the housing flange 41 .

Eine Druckbeaufschlagung der in Fig. 2 linken Druckkammer 49 bewirkt eine Einfahrbewegung der Kolbenstangenstangeneinheit 35 und eine Druckbeaufschlagung der Druckkammer 50 bewirkt eine Ausfahrbewegung der Kolbenstangeneinheit 35. Zur Entlüftung von jeweils axial durch die Membranen 38, 39 der Membrankolben 36, 37 von den Drucckammern 49, 50 getrennten Entlüftungskammern 56, 57, die im Gegensatz zu den Druckkammern 49, 50, die mit einer Hydraulikflüssigkeit gefüllt sind, mit einem aus der Umgebungsluft gebildeten Luftvolumen gefüllt sind, sind die Gehäuseteile 43, 44 jeweils mit einer radialen Entlüftungsbohrung 58, 59 versehen.A pressurization of the in 2 Left-hand pressure chamber 49 causes the piston rod unit 35 to move in and pressurization of the pressure chamber 50 causes the piston rod unit 35 to move out. which, in contrast to the pressure chambers 49, 50, which are filled with a hydraulic fluid, are filled with an air volume formed from the ambient air, the housing parts 43, 44 are each provided with a radial ventilation bore 58, 59.

Aus Fig. 2 wird deutlich, dass die separate Anordnung der Membrankolben 36, 37 in jeweils unabhängig voneinander ausgebildeten Zylinderräumen 33, 34 die Ausbildung einer schematisch angedeuteten Druckfläche 55 an den Membrankolben 36, 37 ermöglicht, die in beiden Druckkammern 49, 50 gleich groß ausgebildet ist, sodass entsprechend übereinstimmende Kolbenkräfte und damit übereinstimmende Zug- und Drucckräfte bei einer Einfahr- beziehungsweise Ausfahrbewegung generiert werden können, die mit dem herausgeführten Kolbenstangenteil 46 übertragen werden können. Darüber hinaus kann aufgrund des die Membrankolben 36, 37 miteinander verbindenden Kolbenstangenzwischenstücks 47 der Durchmesser d1 des Kolbenstangenzwischenstücks 47 kleiner gewählt werden als der Durchmesser d2 des herausgeführten Kolbenstangenteils 47, sodass vergrößerte Kolbenkräfte erzielbar sind.Out of 2 it becomes clear that the separate arrangement of the diaphragm pistons 36, 37 in cylinder chambers 33, 34, each configured independently of one another, enables the formation of a schematically indicated pressure surface 55 on the diaphragm pistons 36, 37, which is of the same size in both pressure chambers 49, 50, so that accordingly matching piston forces and thus matching tensile and compressive forces can be generated during a retraction or extension movement, which can be transmitted with the led-out piston rod part 46. In addition, due to the piston rod intermediate piece 47 connecting the diaphragm pistons 36, 37 to one another, the diameter d1 of the piston rod intermediate piece 47 can be selected to be smaller than the diameter d2 of the protruding piston rod part 47, so that increased piston forces can be achieved.

Claims (5)

  1. A hydropneumatic diaphragm cylinder (30) comprising a cylinder casing (31) and two diaphragm pistons (36, 37) which are disposed in a cylinder space array (32) and each have a diaphragm (38, 39) extending radially between a cylinder wall (60) and a piston rod unit (35), the diaphragm pistons (36, 37) being disposed at an axial offset on the piston rod unit (35) in such a manner that pressurizing one of the diaphragm pistons (36) effects a retracting of the piston rod unit (35) and pressurizing the other diaphragm piston (37) effects an extracting of the piston rod unit (35), the cylinder space array (32) comprising two cylinder spaces (33, 34) which are disposed separately in the cylinder casing (31) and each receive a diaphragm piston (36, 37), a piston-rod middle piece (47) being formed between the diaphragm pistons (36, 37) and penetrating a cylinder middle wall (40) separating the cylinder spaces (33, 34), the diaphragm pistons (36, 37) being pressurized in two adjacent pressure chambers (49, 50) axially limited by the cylinder middle wall (40) and one diaphragm piston (36, 37) each, the piston-rod middle piece (47) having a smaller diameter than the piston rod part (46) of the piston-rod unit (35) protruding from the cylinder casing (31).
  2. The hydropneumatic diaphragm cylinder according to claim 1,
    characterized in that
    the cylinder middle wall (40) is realized as a component of a casing flange (41), the casing flange (41) comprising an annular flange (45), which is disposed on the cylinder middle wall (40), for being connected to two casing parts (43, 44), which are disposed on a shared cylinder axis (42) with the casing flange (41).
  3. The hydropneumatic diaphragm cylinder according to claim 2,
    characterized in that
    the diaphragms (38, 39) of the diaphragm pistons (36, 37) are each received between the annular flange (45) and one casing part (43, 44) by a peripheral edge for being connected to the cylinder wall (60).
  4. The hydropneumatic diaphragm cylinder according to claim 1,
    characterized in that
    for pressurizing the pressure chambers (49, 50), a cylinder-wall section (52, 53) which radially limits the respective pressure chamber (49, 50) is provided with a radial pressure bore (51, 54).
  5. The hydropneumatic diaphragm cylinder according to any one of the preceding claims,
    characterized in that
    for airing airing chambers (56, 57), each separated axially from the pressure chambers (49, 50) by the diaphragms (38, 39), the casing parts (43, 44) are each provided with a radial airing bore (58, 59).
EP20155287.4A 2019-03-26 2020-02-04 Hydropneumatic membrane cylinder Active EP3715645B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202019101693.0U DE202019101693U1 (en) 2019-03-26 2019-03-26 Hydropneumatic diaphragm cylinder

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EP3715645A1 EP3715645A1 (en) 2020-09-30
EP3715645B1 true EP3715645B1 (en) 2023-08-09

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EP (1) EP3715645B1 (en)
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024059783A1 (en) * 2022-09-16 2024-03-21 Decker Colter J Programmable soft actuators for digital and analog control

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2004212A1 (en) * 1970-01-30 1971-08-05 Louis Felder Pressurized piston-cylinder arrangement
US3838630A (en) * 1973-03-30 1974-10-01 J Kobelt Double-acting positioning linear actuator
WO2004016954A1 (en) * 2002-08-19 2004-02-26 Fisher Controls International Llc Reversible, modular fluid actuator with an integrated fluid manifold
DE102008021461A1 (en) * 2008-04-29 2009-11-05 Murrplastik Systemtechnik Vacuum unit
KR101299985B1 (en) * 2012-12-06 2013-08-26 이재성 Actuator which is worked by a variable forming pistons that are made of a flexible sealing membrane

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CN212509053U (en) 2021-02-09
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