EP3715645A1 - Hydropneumatic membrane cylinder - Google Patents

Hydropneumatic membrane cylinder Download PDF

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Publication number
EP3715645A1
EP3715645A1 EP20155287.4A EP20155287A EP3715645A1 EP 3715645 A1 EP3715645 A1 EP 3715645A1 EP 20155287 A EP20155287 A EP 20155287A EP 3715645 A1 EP3715645 A1 EP 3715645A1
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EP
European Patent Office
Prior art keywords
cylinder
diaphragm
piston rod
housing
hydropneumatic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20155287.4A
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German (de)
French (fr)
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EP3715645B1 (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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Publication of EP3715645A1 publication Critical patent/EP3715645A1/en
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Classifications

    • 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 axially offset on the piston rod unit in such a way that pressure is applied to one diaphragm piston a retraction of the piston rod unit and a pressurization of the other diaphragm piston causes the piston rod unit to extend.
  • Hydropneumatic membrane cylinders of the type mentioned at the beginning are used in particular on rewinding cutting and winding systems, the hydropneumatic membrane cylinders serving to press a contact device provided with contact rollers with a defined contact force during the winding process against a winding collar that forms during the winding process in order to be as uniform as possible to enable trained winding diameter. There Any diameter tolerances of the winding collar must be compensated for by the hydropneumatic membrane cylinder.
  • FIG Fig. 1 A hydropneumatic membrane cylinder previously used by the applicant, which in the present case forms the prior art, is shown schematically in FIG Fig. 1 shown.
  • the known diaphragm cylinder 10 has in a cylinder housing 11 two diaphragm pistons 14 and 15 which are arranged axially offset from one another in a common cylinder space 12 on a piston rod unit 13.
  • a membrane 16 and a in Fig. 1 right housing part 17 formed pressure chamber 18 through a pressure bore 20 running parallel to a cylinder axis 19 in an end face of housing part 17 is acted upon with hydraulic oil, the hydraulic oil being acted upon with pneumatic pressure via a pressure transducer not shown here outside of cylinder housing 11.
  • an axial gap 25 is formed between the membranes 16, 24, which is radially delimited by a housing ring 26, the housing ring 26 forming a connecting part between the housing parts 17 and 23 and circumferential edges 27, 28 of the membranes 16, 24 between a housing part 17, 23 and the housing ring 26 are received.
  • the housing ring 26 has a radial vent hole 29 which connects the space 25 with the environment.
  • Fig. 1 The well-known in Fig. 1
  • the diaphragm cylinder 10 shown, the diaphragm pistons 14, 15 or the diaphragms 16, 24 are located in the common cylinder space 12 and are only separated from one another by the intermediate space 25.
  • the intermediate space 25 can collapse so that the membranes 16, 24 touch one another.
  • the present invention is based on the object of proposing a diaphragm cylinder which enables the piston rod to move as steadily as possible and excludes mutual contact between the diaphragms.
  • the membrane cylinder according to the invention has the features of claim 1.
  • the hydropneumatic membrane cylinder according to the invention has a cylinder chamber arrangement with two cylinder chambers which are arranged separately in the cylinder housing and each receive a membrane piston.
  • the spatial separation of the membrane pistons according to the invention prevents the membranes of the membrane pistons from being able to apply pressure to one another via an intermediate pneumatic volume, so that, in contrast to the known membrane cylinder, the membranes of the membrane cylinder according to the invention are pneumatically decoupled. A mutual pneumatic influence of the membranes is therefore excluded.
  • a piston rod intermediate piece is provided between the diaphragm pistons which penetrates an intermediate cylinder wall separating the cylinder spaces.
  • the intermediate cylinder wall is preferably designed as a component 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 piston for connection to the cylinder wall are each accommodated with a peripheral edge between the annular flange and a housing part, conventionally designed diaphragms, as are known from the prior art, can be used despite the different design of the cylinder housing with two separate cylinder chambers will.
  • the diaphragm pistons are preferably pressurized in two adjacent pressure chambers that are axially delimited by the cylinder partition and one diaphragm piston each, so that due to the correspondingly matching configuration of the pressure chambers on both sides of the partition, a correspondingly matching pressure surface of the diaphragm piston is made possible, and during a retraction and extension movement identical forces act on the diaphragm pistons.
  • the piston rod intermediate piece preferably has a diameter that differs from a piston rod part of the piston rod unit led out of the cylinder housing, so that the piston rod intermediate piece in particular has a smaller diameter than the piston rod part led out of the cylinder housing, and thus to achieve an increase in the tensile or compressive forces transmitted through the piston rod unit Pressure surface of the diaphragm piston can be made larger regardless of the diameter of the piston rod part 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 to coincide with the pressure bores in the outer surface of the cylinder housing.
  • Fig. 2 shows a membrane cylinder 30, which has two separately designed cylinder chambers 33, 34 in a cylinder housing 31 to form a cylinder chamber 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 from one another by a piston rod intermediate piece 47 and each having a diaphragm 38, 39.
  • a cylinder partition 40 is provided between them, which is formed 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 formed 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 housing part 43, 44 adjacent to the annular flange 45.
  • Fig. 2 shows is the in Fig. 2 left diaphragm piston 36 is arranged at the end of the piston rod intermediate piece 47 of the piston rod unit 35, which penetrates the cylinder intermediate wall 40 and which in FIG Fig. 2 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 reduced in diameter d 1 compared to the protruding piston rod part 46 and the diaphragm piston 37 is located on a piston rod collar 48 in the transition between the piston rod intermediate piece 47 and the protruding piston rod part 46.
  • the pressurization of the diaphragm pistons 36, 37 takes place in two adjacent pressure chambers 49, 50 which are axially delimited by the cylinder partition 40 and one diaphragm piston 36, 37 in each case Fig. 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 which radially delimits the pressure chamber 49, and for pressurizing the in Fig. 2
  • Right pressure chamber 50 a cylinder wall section 53 delimiting the pressure chamber 50 radially 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.
  • the left pressure chamber 49 causes the piston rod unit 35 to retract, and the application of pressure to the pressure chamber 50 causes the piston rod unit 35 to move outward.
  • the venting chambers 56, 57 each axially separated by the diaphragms 38, 39 of the diaphragm pistons 36, 37 from the pressure chambers 49, 50, 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 vent hole 58, 59.
  • the diameter d1 of the piston rod intermediate piece 47 can be selected to be smaller than the diameter d2 of the piston rod part 47 guided out, 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)
  • Vehicle Body Suspensions (AREA)
  • Actuator (AREA)

Abstract

Hydropneumatischer Membranzylinder (30) mit einem Zylindergehäuse (31) und zwei in einer Zylinderraumanordnung (32) angeordneten Membrankolben (36, 37) mit jeweils einer sich radial zwischen einer Zylinderwand (60) und einer Kolbenstangeneinheit (35) erstreckenden Membran (38, 39), wobei die Membrankolben (36, 37) axial versetzt an der Kolbenstangeneinheit (35) angeordnet sind, derart, dass eine Druckbeaufschlagung des einen Membrankolbens (36) ein Einfahren der Kolbenstangeneinheit (35) und eine Druckbeaufschlagung des anderen Membrankolbens (37) ein Ausfahren der Kolbenstangeneinheit (37) bewirkt, wobei die Zylinderraumanordnung (32) zwei getrennt im Zylindergehäuse (31) angeordnete Zylinderräume (33, 34) aufweist, die jeweils einen Membrankolben (36, 37) aufnehmen.Hydropneumatic diaphragm cylinder (30) with a cylinder housing (31) and two diaphragm pistons (36, 37) arranged in a cylinder chamber arrangement (32), each with a diaphragm (38, 39) extending radially between a cylinder wall (60) and a piston rod unit (35) , wherein the diaphragm pistons (36, 37) are arranged axially offset on the piston rod unit (35) such that pressurization of one diaphragm piston (36) retracts the piston rod unit (35) and pressurization of the other diaphragm piston (37) extends the Piston rod unit (37), the cylinder chamber arrangement (32) having two cylinder chambers (33, 34) which are arranged separately in the cylinder housing (31) and each receive a diaphragm piston (36, 37).

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 axially offset on the piston rod unit in such a way that pressure is applied to one diaphragm piston a retraction of the piston rod unit and a pressurization of 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 beginning are used in particular on rewinding cutting and winding systems, the hydropneumatic membrane cylinders serving to press a contact device provided with contact rollers with a defined contact force during the winding process against a winding collar that forms during the winding process in order to be as uniform as possible to enable trained winding diameter. There Any diameter tolerances of the winding collar must be compensated for by the hydropneumatic membrane cylinder.

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 hydropneumatic membrane cylinder previously used by the applicant, which in the present case forms the prior art, is shown schematically in FIG Fig. 1 shown. The known diaphragm cylinder 10 has in a cylinder housing 11 two diaphragm pistons 14 and 15 which are 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 Fig. 1 the piston rod unit 13 is in the working position. To transfer the piston rod unit 13 into its retracted position, a membrane 16 and a in Fig. 1 Right housing part 17 formed pressure chamber 18 through a pressure bore 20 running parallel to a cylinder axis 19 in an end face of housing part 17 is acted upon with hydraulic oil, the hydraulic oil being acted upon with pneumatic pressure via a pressure transducer not shown here outside of cylinder housing 11.

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 Druckkammer 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 Fig. 1 right pressure chamber 18 is a force relief with simultaneous pressurization of an in Fig. 1 left pressure chamber 22, which is formed between a left housing part 23 of the cylinder housing 11 and a diaphragm 24 of the left diaphragm piston 14, so that an oil volume arranged in the pressure chamber 22 is displaced by a pressure bore 21 also formed parallel to the cylinder axis 19 in an end face of the left housing part 23 becomes. In this case, the displacement resistance ensures damping of the retraction movement of the piston rod unit 13. The piston rod 13 is extended out of the cylinder housing 11 in an analogous manner by applying more pressure to the left pressure chamber 22, in which case an oil volume arranged in the right pressure chamber 18 is then displaced for a ensures 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 Fig. 1 further shows, an axial gap 25 is formed between the membranes 16, 24, which is radially delimited by a housing ring 26, the housing ring 26 forming a connecting part between the housing parts 17 and 23 and circumferential edges 27, 28 of the membranes 16, 24 between a housing part 17, 23 and the housing ring 26 are received. In addition, the housing ring 26 has a radial vent hole 29 which connects the space 25 with 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.The well-known in Fig. 1 The diaphragm cylinder 10 shown, the diaphragm pistons 14, 15 or the diaphragms 16, 24 are located in the common cylinder space 12 and are only separated 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 from one another within the cylinder space 13 by the air-filled space 25, in particular in a central position of the membrane pistons 14, 15 between the retracted Position and the extended position of the piston rod unit 13 can lead to a mutual influence of the membranes 17, 24, which can lead to discontinuities during an inward or outward movement of the piston rod in the area of the piston center position. In particular, as a result of the simultaneous application of pressure to the left pressure chamber 22 and the right pressure chamber 18, the intermediate space 25 can collapse 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 diaphragm cylinder which enables the piston rod to move as steadily as possible and excludes mutual contact between the diaphragms.

Zur Lösung dieser Aufgabe weist der erfindungsgemäße Membranzylinder die Merkmale des Anspruchs 1 auf.To achieve this object, the membrane 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 membrane cylinder according to the invention has a cylinder chamber arrangement with two cylinder chambers which are arranged separately in the cylinder housing and each receive a membrane 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 membrane pistons according to the invention prevents the membranes of the membrane pistons from being able to apply pressure to one another via an intermediate pneumatic volume, so that, in contrast to the known membrane cylinder, the membranes of the membrane cylinder according to the invention are pneumatically decoupled. A mutual pneumatic influence of the membranes is therefore excluded.

Bei einer bevorzugten Ausführungsform des hydropneumatischen Membranzylinders ist zur pneumatischen Entkopplung der Membranen vorgesehen, zwischen den Membrankolben ein Kolbenstangenzwischenstück auszubilden, das eine die Zylinderräume trennende Zylinderzwischenwand durchdringt.In a preferred embodiment of the hydropneumatic diaphragm cylinder, for the pneumatic decoupling of the diaphragms, a piston rod intermediate piece is provided between the diaphragm pistons which penetrates an intermediate cylinder wall separating the cylinder spaces.

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 a component 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 spaces, which each receive 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 piston for connection to the cylinder wall are each accommodated with a peripheral edge between the annular flange and a housing part, conventionally designed diaphragms, as are known from the prior art, can be used despite the different design of the cylinder housing with two separate cylinder chambers will.

Vorzugsweise erfolgt die Druckbeaufschlagung der Membrankolben 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 diaphragm pistons are preferably pressurized in two adjacent pressure chambers that are axially delimited by the cylinder partition and one diaphragm piston each, so that due to the correspondingly matching configuration of the pressure chambers on both sides of the partition, a correspondingly matching pressure surface of the diaphragm piston is made possible, and during a retraction and extension movement identical forces act on the diaphragm pistons.

Vorzugsweise weist das Kolbenstangenzwischenstück einen von einem aus dem Zylindergehäuse herausgeführten Kolbenstangenteil der Kolbenstangeneinheit abweichenden Durchmesser auf, sodass das Kolbenstangenzwischenstück insbesondere einen kleineren Durchmesser als der aus dem Zylindergehäuse herausgeführte Kolbenstangenteil aufweist, und somit 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 kann.The piston rod intermediate piece preferably has a diameter that differs from a piston rod part of the piston rod unit led out of the cylinder housing, so that the piston rod intermediate piece in particular has a smaller diameter than the piston rod part led out of the cylinder housing, and thus to achieve an increase in the tensile or compressive forces transmitted through the piston rod unit Pressure surface of the diaphragm piston can be made larger regardless of the diameter of the piston rod part 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 pressurization of 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 hole to vent the vent chambers axially separated from the pressure chambers by the membranes, the vent bores can be provided to coincide with the pressure bores in the outer surface of the cylinder housing.

Nachfolgend wird eine bevorzugte Ausführungsform des hydropneumatischen Membranzylinders anhand der Zeichnung näher erläutert.A preferred embodiment of the hydropneumatic membrane 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:
Fig. 1
a prior art hydropneumatic diaphragm cylinder;
Fig. 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. Fig. 2 shows a membrane cylinder 30, which has two separately designed cylinder chambers 33, 34 in a cylinder housing 31 to form a cylinder chamber 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 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 spaces 33, 34, a cylinder partition 40 is provided between them, which is formed 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 formed 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 housing part 43, 44 adjacent to the annular flange 45.

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 Fig. 2 shows is the in Fig. 2 left diaphragm piston 36 is arranged at the end of the piston rod intermediate piece 47 of the piston rod unit 35, which penetrates the cylinder intermediate wall 40 and which in FIG Fig. 2 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 reduced in diameter d 1 compared to the protruding piston rod part 46 and the diaphragm piston 37 is located on a piston rod collar 48 in the transition between the piston rod intermediate piece 47 and the protruding piston rod part 46.

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 cylinder partition 40 and one diaphragm piston 36, 37 in each case Fig. 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 which radially delimits the pressure chamber 49, and for pressurizing the in Fig. 2 Right pressure chamber 50, a cylinder wall section 53 delimiting the pressure chamber 50 radially 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.Pressurizing the in Fig. 2 The left pressure chamber 49 causes the piston rod unit 35 to retract, and the application of pressure to the pressure chamber 50 causes the piston rod unit 35 to move outward. To vent the venting chambers 56, 57, each axially separated by the diaphragms 38, 39 of the diaphragm pistons 36, 37 from the pressure chambers 49, 50, 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 vent hole 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 Fig. 2 it becomes clear that the separate arrangement of the diaphragm pistons 36, 37 in each independently formed cylinder chambers 33, 34 enables the formation of a schematically indicated pressure surface 55 on the diaphragm piston 36, 37, which is formed the same size in both pressure chambers 49, 50, so that accordingly Corresponding piston forces and therefore corresponding tensile and compressive forces can be generated during an inward or outward movement, which can be transmitted with the piston rod part 46 that is guided out. In addition, due to the piston rod intermediate piece that connects the diaphragm pistons 36, 37 to one another 47, the diameter d1 of the piston rod intermediate piece 47 can be selected to be smaller than the diameter d2 of the piston rod part 47 guided out, so that increased piston forces can be achieved.

Claims (9)

Hydropneumatischer Membranzylinder (30) mit einem Zylindergehäuse (31) und zwei in einer Zylinderraumanordnung (32) angeordneten Membrankolben (36, 37) mit jeweils einer sich radial zwischen einer Zylinderwand (60) und einer Kolbenstangeneinheit (35) erstreckenden Membran (38, 39), wobei die Membrankolben (36, 37) axial versetzt an der Kolbenstangeneinheit (35) angeordnet sind, derart, dass eine Druckbeaufschlagung des einen Membrankolbens (36) ein Einfahren der Kolbenstangeneinheit (35) und eine Druckbeaufschlagung des anderen Membrankolbens (37) ein Ausfahren der Kolbenstangeneinheit (37) bewirkt,
dadurch gekennzeichnet,
dass die Zylinderraumanordnung (32) zwei getrennt im Zylindergehäuse (31) angeordnete Zylinderräume (33, 34) aufweist, die jeweils einen Membrankolben (36, 37) aufnehmen.Hydropneumatic diaphragm cylinder (30) with a cylinder housing (31) and two diaphragm pistons (36, 37) arranged in a cylinder chamber arrangement (32), each with a diaphragm (38, 39) extending radially between a cylinder wall (60) and a piston rod unit (35) , wherein the diaphragm pistons (36, 37) are arranged axially offset on the piston rod unit (35) such that pressurization of one diaphragm piston (36) retracts the piston rod unit (35) and pressurization of the other diaphragm piston (37) extends the Piston rod unit (37) causes
characterized,
that the cylinder chamber arrangement (32) has two cylinder chambers (33, 34) which are arranged separately in the cylinder housing (31) and which each receive a membrane piston (36, 37). Hydropneumatischer Membranzylinder nach Anspruch 1,
dadurch gekennzeichnet,
dass zwischen den Membrankolben (36, 37) ein Kolbenstangenzwischenstück (47) ausgebildet ist, das eine die Zylinderräume (33, 34) trennende Zylinderzwischenwand (40) durchdringt.Hydropneumatic diaphragm cylinder according to claim 1,
characterized,
that between the membrane pistons (36, 37) a piston rod intermediate piece (47) is formed, which penetrates a cylinder partition (40) separating the cylinder spaces (33, 34). Hydropneumatischer Membranzylinder nach Anspruch 2,
dadurch gekennzeichnet,
dass die Zylinderzwischenwand (40) als Bestandteil eines Gehäuseflansches (41) ausgebildet ist, wobei der Gehäuseflansch (41) zur Verbindung mit zwei auf einer gemeinsamen Zylinderachse (42) mit dem Gehäuseflansch (41) angeordneten Gehäuseteilen (43, 44) einen an der Zylinderzwischenwand (40) angeordneten Ringflansch (45) aufweist.Hydropneumatic membrane cylinder according to claim 2,
characterized,
that the cylinder partition (40) is designed as a component of a housing flange (41), the housing flange (41) for connection to two housing parts (43, 44) arranged on a common cylinder axis (42) with the housing flange (41) one on the cylinder partition (40) has arranged annular flange (45). Hydropneumatischer Membranzylinder nach Anspruch 3,
dadurch gekennzeichnet,
dass die Membranen (38, 39) der Membrankolben (36, 37) zur Verbindung mit der Zylinderwand (60) jeweils mit einem Umfangsrand zwischen dem Ringflansch (45) und einem Gehäuseteil (43, 44) aufgenommen sind.Hydropneumatic membrane cylinder according to Claim 3,
characterized,
that the membranes (38, 39) of the membrane pistons (36, 37) for connection to the cylinder wall (60) are each received with a peripheral edge between the annular flange (45) and a housing part (43, 44). Hydropneumatischer Membranzylinder nach einem der Ansprüche 2 bis 4,
dadurch gekennzeichnet,
dass die Druckbeaufschlagung der Membrankolben (36, 37) in zwei benachbarten, durch die Zylinderzwischenwand (40) und jeweils einen Membrankolben (36, 37) axial begrenzten Druckkammern (49, 50) erfolgt.Hydropneumatic membrane cylinder according to one of Claims 2 to 4,
characterized,
that pressure is applied to the diaphragm pistons (36, 37) in two adjacent pressure chambers (49, 50) which are axially delimited by the cylinder partition (40) and in each case by a diaphragm piston (36, 37). Hydropneumatischer Membranzylinder nach einem der Ansprüche 2 bis 5,
dadurch gekennzeichnet,
dass das Kolbenstangenzwischenstück (47) einen von einem aus dem Zylindergehäuse (31) herausgeführten Kolbenstangenteil (46) der Kolbenstangeneinheit (35) abweichenden Durchmesser aufweist.Hydropneumatic membrane cylinder according to one of Claims 2 to 5,
characterized,
that the piston rod intermediate piece (47) has a diameter which differs from a piston rod part (46) of the piston rod unit (35) which is led out of the cylinder housing (31). Hydropneumatischer Membranzylinder nach Anspruch 6,
dadurch gekennzeichnet,
dass das Kolbenstangenzwischenstück (47) einen kleineren Durchmesser als das herausgeführte Kolbenstangenteil (46) aufweist.Hydropneumatic diaphragm cylinder according to claim 6,
characterized,
that the piston rod intermediate piece (47) has a smaller diameter than the protruding piston rod part (46). Hydropneumatischer Membranzylinder nach einem der Ansprüche 5 bis 7,
dadurch gekennzeichnet,
dass zur Druckbeaufschlagung der Druckkammern (49, 50) ein die jeweilige Druckkammer (49, 50) radial begrenzender Zylinderwandabschnitt (52, 53) mit einer radialen Druckbohrung (51, 54) versehen ist.Hydropneumatic membrane cylinder according to one of Claims 5 to 7,
characterized,
that a cylinder wall section (52, 53) which radially delimits the respective pressure chamber (49, 50) is provided with a radial pressure bore (51, 54) for pressurization of the pressure chambers (49, 50). Hydropneumatischer Membranzylinder nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet,
dass zur Entlüftung von jeweils axial durch die Membranen (38, 39) von den Druckkammern (49, 50) getrennten Entlüftungskammern (56, 57) die Gehäuseteile (43, 44) jeweils mit einer radialen Entlüftungsbohrung (58, 59) versehen sind.Hydropneumatic membrane cylinder according to one of the preceding claims,
characterized,
that the housing parts (43, 44) are each provided with a radial vent hole (58, 59) to vent the vent chambers (56, 57) axially separated from the pressure chambers (49, 50) by the membranes (38, 39).
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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Cited By (1)

* 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

Citations (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
EP2113673A2 (en) * 2008-04-29 2009-11-04 Murrplastik Systemtechnik GmbH Vacuum unit
WO2014088278A1 (en) * 2012-12-06 2014-06-12 Lee Jae-Sung Actuator driven by variable piston made from soft sealing film

Patent Citations (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
EP2113673A2 (en) * 2008-04-29 2009-11-04 Murrplastik Systemtechnik GmbH Vacuum unit
WO2014088278A1 (en) * 2012-12-06 2014-06-12 Lee Jae-Sung Actuator driven by variable piston made from soft sealing film

Cited By (1)

* 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

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CN212509053U (en) 2021-02-09
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