EP1334280A2 - Hydraulic accumulator - Google Patents

Hydraulic accumulator

Info

Publication number
EP1334280A2
EP1334280A2 EP01994545A EP01994545A EP1334280A2 EP 1334280 A2 EP1334280 A2 EP 1334280A2 EP 01994545 A EP01994545 A EP 01994545A EP 01994545 A EP01994545 A EP 01994545A EP 1334280 A2 EP1334280 A2 EP 1334280A2
Authority
EP
European Patent Office
Prior art keywords
valve
hydraulic accumulator
switching
accumulator
housing
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
EP01994545A
Other languages
German (de)
French (fr)
Other versions
EP1334280B1 (en
Inventor
Norbert Weber
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.)
Hydac Technology GmbH
Original Assignee
Hydac Technology GmbH
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 Hydac Technology GmbH filed Critical Hydac Technology GmbH
Publication of EP1334280A2 publication Critical patent/EP1334280A2/en
Application granted granted Critical
Publication of EP1334280B1 publication Critical patent/EP1334280B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/22—Liquid port 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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/027—Installations or systems with accumulators having accumulator charging devices
    • F15B1/033—Installations or systems with accumulators having accumulator charging devices with electrical control means
    • 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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
    • F15B2013/004—Cartridge valves
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/205—Accumulator cushioning means using gas
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/41—Liquid ports
    • F15B2201/411—Liquid ports having valve means
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/415—Gas ports
    • F15B2201/4155—Gas ports having valve means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7784—Responsive to change in rate of fluid flow
    • Y10T137/7792—Movable deflector or choke

Definitions

  • the invention relates to a hydraulic accumulator, in particular a piston accumulator, with a storage housing and with at least one gas space and a fluid space arranged therein, which are separated from one another by a separating element, at least one of these spaces being able to be filled with or from a pressure medium by means of a valve control unit having at least one switching valve can be at least partially emptied and the respective switching valve is accommodated in an associated valve receptacle, which can be moved in the direction of movement of the separating element from an open position to a closed position and vice versa
  • One of the main tasks of hydraulic accumulators is, among other things, to take up certain volumes of pressurized fluids in a hydraulic system and to return them to the system on demand.
  • Piston accumulators, bladder accumulators, membrane accumulators as well as weight and spring-loaded accumulators are regularly used as hydraulic accumulators.
  • a multitude of tasks can be realized, such as energy storage, shock, vibration and pulsation damping, energy recovery, volume flow compensation etc.
  • Venti control units, which are regularly provided with switching or directional valves for controlling the fluid flow from and to the hydraulic accumulator, are used for the operation of the hydraulic accumulators and for their control.
  • the hydraulic accumulator is regularly connected to a piping with fluid lines that establish the fluid-carrying connection between the accumulator and the valve control unit.
  • Disadvantages of the known solution are in the form of leakage problems due to the increased number of connections between hydraulic accumulator piping and valve control unit and also in the additional costs for the line network on fluid lines to see.
  • problems in accommodating the large number of components mentioned and connecting them in a fluid-conducting manner since various manufacturers are responsible for the hydraulic accumulators, the piping and / or the valves of the valve control unit, there are difficulties with adaptation, in particular at the points of installation on site.
  • a generic hydraulic accumulator is known from DE-A-27 07 469, in particular in the form of a device for pressure regulation.
  • the known hydraulic accumulator solves the tasks on the one hand of keeping the pressure in the accumulator at a given pressure, and on the other hand protecting the accumulator against any accidental overpressure.
  • the known hydraulic accumulator has a valve slide in the manner of a hollow within a valve receptacle which extends in the longitudinal axis of the hydraulic accumulator
  • Bushing which receives the high pressure in its center and which is exposed to the operating pressure to be regulated at one of its ends. At its other end, it rests on a support body to which an adjustable spring applies a counterforce. Since the area of the contact circle between see the sleeve and the support body is smaller than the area of the cross section of the sleeve itself, the adjustments of the sleeve against the spring cause the closing of the inlet opening in the sense of a switching valve through which the high pressure occurs.
  • the known valve arrangement is an integral part of the lower housing half of the accumulator, which can be screwed to the upper housing half to form the hydraulic accumulator housing.
  • the separating element is formed from a rubber-elastic membrane which is provided in the center with a closing body, so that the switching direction of the switching valve also runs in the direction of movement of the separating element. If the switching valve fails in the known solution, the valve control unit containing the switching valve, together with the lower housing half, must be removed for maintenance purposes or provided for a corresponding replacement, which increases the manufacturing and maintenance costs in the known solution.
  • the valve control unit with the known switching valve is geometrically large, only one valve function can be carried out in relation to the control of the separating element.
  • the invention is based on the object of helping to avoid the disadvantages described, in particular to create a hydraulic accumulator which overall requires little installation space, which enables favorable fluid management of the fluid streams to be controlled and which is nevertheless inexpensive to manufacture and is in maintenance.
  • a related problem is solved by a hydraulic accumulator with the features of claim 1 in its entirety.
  • valve control unit is accommodated in a valve block that is independent of the housing, that the valve block has a further receptacle for a further switching valve that solves another switching task, and that the valve receptacles are essentially the same and are arranged off-center of the longitudinal axis of the hydraulic accumulator, for the modular use of the switching valves designed as identical parts, a plurality of switching functions related to a hydraulic accumulator can be achieved despite the small geometric dimensions of the valve control unit.
  • one switching valve can be used to control the separating element and the other switching valve can be used for other tasks, for example also for controlling the gas volume in the gas space of the hydraulic accumulator.
  • the respective additional switching valve can also perform other switching tasks, based on neighboring fluid technology devices, for example in the form of cooling pumps, hydrocylinder devices, etc. Since the switching direction of the switching valves is parallel to the direction of movement of the separating element and in the longitudinal direction of the hydraulic accumulator, it is possible to control the fluid flows in a fluid-efficient manner without deflection. Since both the valve receptacles and the switching valves themselves are constructed in the manner of identical parts, the valve control unit and consequently the hydraulic accumulator can be designed very inexpensively. Is a specific switching valve for a specific use of the hydraulic accumulator.
  • the respective switching valves are accommodated in the valve control unit in a diametrical arrangement with respect to the longitudinal axis of the hydraulic accumulator. Because of the similar arrangement in this respect, a vibration-free initiation of the switching process into the basic housing of the hydraulic accumulator is achieved during the switching process of the respective switching valve, in particular with a simultaneous switching movement.
  • the control block engages with its extension and in flush contact with the inner circumference of the accumulator housing, the accumulator housing resting with its one free end on a shoulder of the control block at which the extension begins.
  • This allows a secure seal of the connection between the storage housing and control reach the block process.
  • an exact contact of the storage housing with the other control block is possible via the shoulder and the storage housing is securely guided along the extension of the control block. An undesired separation of the storage housing and valve control unit is thus avoided with certainty.
  • control block delimits the fluid space with its extension, the control block having at least one fluid channel which opens into the fluid space with its one free end and is connected to the switching valve with its other free end. Since the control block merges directly into the fluid space, the free paths for the pressure medium are small and thus fast response times for the hydraulic accumulator are achieved.
  • the hydraulic accumulator is designed in the manner of a piston accumulator.
  • This has a storage housing 10 with a gas space 12 arranged therein and a fluid space 14.
  • the gas space 12 is opposite the fluid space 14 via a separating element 16 in the form of a piston partly separated, which is guided in a longitudinally displaceable manner along the inner circumference of the storage housing 10, so that the ratio of the gas space 12 to the fluid space 14 is kept variable.
  • the separating element 16 is designed as a hollow part and has a corresponding recess 18 in the interior.
  • the gas space 12 When viewed in the direction of the figure, the gas space 12 is closed at the top by a cover part 20, which has a central bore 22 through which a working gas, for example nitrogen gas, can be introduced into the gas space 12.
  • a working gas for example nitrogen gas
  • the relevant central bore 22 is then sealed gas-tight via a shut-off valve or the like (not shown), the amount of gas in the gas space 12 being able to be checked and refilled from time to time via the shut-off valve.
  • valve control unit At the opposite end of the storage housing 10, the valve control unit, designated as a whole by 26, is connected in the manner of a control block 24.
  • the valve control unit 26 has two switching valves / whereby the first switching valve is provided with 28 and the second switching valve with the reference symbol 30.
  • the relevant valve control unit 26 is therefore an integral part of the storage housing 10, the control block 24 being provided for this purpose with a projection 32 which engages in flush contact with the inner circumference of the storage housing 10. It is further provided that the storage housing 10 rests with its one free end 34 on a shoulder 36 of the control block 24, at which the extension 32 begins. Compared to the other outer diameter of the control block 24, the extension 32 engaging in the storage housing 10 is therefore reduced in diameter in accordance with the downgrading via the shoulder 36.
  • the hydraulic accumulator according to the invention is therefore characterized in that the valve control unit 26 in a valve that is independent of the housing 10.
  • tilblock 24 is included that the valve block 24 has a further valve receptacle 31 for a further switching valve 30, which solves another switching task, and that the valve receptacles 29, 31 are essentially of the same design and are arranged off-center of the longitudinal axis 33 of the hydraulic accumulator for modular use of the switching valves 28, 30 which can be formed as identical parts.
  • control block 24 delimits the fluid space 14 downward as viewed in the figure.
  • the accumulator housing 10, the spaces 12 and 14, the cover part 20, the piston part 16 and the extension 32 are essentially designed as cylindrical components and extend along a common longitudinal axis 38 of the hydraulic accumulator.
  • the control block 24 also has a fluid channel 40, which is arranged eccentrically to the longitudinal axis 38 and which opens into the fluid space 14 with its one free end and is connected to the first switching valve 28 with its other free end.
  • a transverse connection 42 is present in the control block 24 and extends across the fluid channel 40, to which a fluid supply line, for example as part of a hydraulic circuit, could be connected.
  • the first switching valve 28 is then connected between the transverse connection 42 and the fluid channel 40, the fluid-carrying connection between the transverse connection 42 and the fluid channel 40 being released in one switching position and being considered blocked in the other switching position.
  • the first switching valve 28 is preferably designed as a so-called 2/2-way valve.
  • other valves such as directional spool valves, valves with damping or the like, depending on the respective intended use.
  • a further second switching valve 30 is arranged next to it, which in the present case is likewise designed in the manner of a 2/2-way valve.
  • the second switching valve 30 has two side connections 44, 46 which, like the cross connection 42, emerge laterally from the control block 24 in the radial direction.
  • the two side connections 44, 46 are in turn separated from one another via the switching parts of the second switching valve 30.
  • the side connections 44, 46 are connected to one another in a fluid-carrying manner or are separated from one another in the blocking position of the valve.
  • the inlet and outlet of the working gas in the gas space 12 could be controlled, for example, in an embodiment that is not shown in more detail, provided that the connections 44, 46 were connected to the gas space 12 in a fluid-carrying manner via connection points in the cover part 20.
  • the switching valves 28, 30 are designed as solenoid valves 48, which can be electrically controlled via connections 50. Since solenoid valves 48 in this regard belong to the prior art, no further details will be given here.
  • the first and second switching valves 28 and 30 are arranged essentially axially parallel to the longitudinal axis 38 of the hydraulic accumulator in the control block 24. But there would also be other installation positions, especially in radial direction, transverse to the longitudinal axis 38 possible. Due to the flush connection of the storage housing 10 to the control block 24, leaks are avoided and complex, expensive piping can be dispensed with.
  • the first switching valve 28 is in particular arranged in the immediate vicinity of the fluid space 14 and separated only via the fluid channel 40, which is kept short in length, so that it is very short Actuation times for the hydraulic accumulator can be expected.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Lubricants (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

A hydraulic accumulator, especially a piston accumulator, includes an accumulator housing (10) with at least one gas chamber (12) and a fluid chamber (14). These chambers are separated from each other by a separating element (16). At least one of these chambers (12, 14) can be filled with a pressure medium or at least partially emptied through at least one valve control unit (26) which has switching valves (28, 30). One switching valve (28) is accommodated in a corresponding valve location (29), and can be moved in the direction of movement of the separating element (16) from an opening position into closing position and vice-versa. Expensive line network between the hydraulic accumulator and the valve control unit is avoided. Sealing or leakage problems, such as are common in a line network, never occur. The valve control unit (26) is accommodated in a valve block (24) which is independent from the housing (10). The valve block (24) has an additional valve location (31) for an additional switching valve (30) for performing another switching task. The valve locations (29, 31) are configured essentially identically and are situated eccentrically in relation to the longitudinal axis (33) of the hydraulic accumulator for modular use of the switching valves (28, 30), which are configured as identical parts.

Description

Hydrospeicher hydraulic accumulator
Die Erfindung betrifft einen Hydrospeicher, insbesondere Kolbenspeicher, mit einem Speichergehäuse und mit mindestens einem darin angeordneten Gasraum und einem Fluidraum, die über ein Trennelement voneinander getrennt sind, wobei mindestens einer dieser Räume über eine mindestens ein Schaltventil aufweisende Ventilsteuereinheit mit einem Druckmedium befüllbar oder von diesem zumindest teilweise entleerbar ist und wobei das jeweilige Schaltventil in einer zugehörigen Ventilaufnahme untergebracht ist, das in Bewegungsrichtung des Trennelementes von einer Öffnungsstellung in eine Schließstellung und umgekehrt bewegbar istThe invention relates to a hydraulic accumulator, in particular a piston accumulator, with a storage housing and with at least one gas space and a fluid space arranged therein, which are separated from one another by a separating element, at least one of these spaces being able to be filled with or from a pressure medium by means of a valve control unit having at least one switching valve can be at least partially emptied and the respective switching valve is accommodated in an associated valve receptacle, which can be moved in the direction of movement of the separating element from an open position to a closed position and vice versa
Eine der Hauptaufgaben von Hydrospeichern ist unter anderem, bestimmte Volumen unter Druck stehender Fluide einer hydraulischen Anlage aufzunehmen und diese auf Abruf wieder an die Anlage zurückzugeben. Als Hydrospeicher kommen dabei regelmäßig Kolbenspeicher, Blasenspeicher, Membranspeicher aber auch gewichts- und federbelastete Speicher in Einsatz. Mit dahingehenden Hydrospeichern lassen sich eine Vielzahl von Aufgaben realisieren, wie Energiespeicherung, Stoß-, Schwingungs- und Pulsationsdämpfung, Rückgewinnung von Energien, Volumenstromkompensation etc.. Für den Betrieb der Hydrospeicher und zu deren Ansteuerung dienen Ven- ti [Steuereinheiten, die regelmäßig mit Schalt- oder Wegeventilen versehen sind zur Beherrschung des Fluidstromes vom und zum Hydrospeicher. Der Hydrospeicher ist dabei regelmäßig an eine Verrohrung mit Fluidleitungen angeschlossen, die die fluidführende Verbindung zwischen dem Speicher und der Ventilsteuereinheit herstellen. Nachteile der dahingehend bekannten Lösung, wie sie in einer Vielzahl von Ausführungsformen auf dem Markt frei zu erhalten ist, bestehen in Form von Dichtigkeitsproblemen durch die erhöhte Anzahl von Verbindungen zwischen Hydrospeicher- Verrohrungen und Ventilsteuereinheit und ist auch in den zusätzlichen Kosten für das Leitungsnetz an Fluidleitungen zu sehen. Insbesondere bei eng bemessenen Einbauverhältnissen bietet es darüber hinaus Probleme, die Vielzahl der genannten Komponenten sinnfällig unterzubringen und miteinander fluidführend zu verbinden. Da darüber hinaus verschiedene Her- steller sich verantwortlich zeichnen für die Hydrospeicher, die Verrohrung und/oder die Ventile der Ventilsteuereinheit, kommt es insbesondere an Stellen des Einbaus vor Ort zu Anpassungsschwierigkeiten.One of the main tasks of hydraulic accumulators is, among other things, to take up certain volumes of pressurized fluids in a hydraulic system and to return them to the system on demand. Piston accumulators, bladder accumulators, membrane accumulators as well as weight and spring-loaded accumulators are regularly used as hydraulic accumulators. With this kind of hydraulic accumulator, a multitude of tasks can be realized, such as energy storage, shock, vibration and pulsation damping, energy recovery, volume flow compensation etc. Venti [control units, which are regularly provided with switching or directional valves for controlling the fluid flow from and to the hydraulic accumulator, are used for the operation of the hydraulic accumulators and for their control. The hydraulic accumulator is regularly connected to a piping with fluid lines that establish the fluid-carrying connection between the accumulator and the valve control unit. Disadvantages of the known solution, as can be obtained freely in a large number of embodiments on the market, are in the form of leakage problems due to the increased number of connections between hydraulic accumulator piping and valve control unit and also in the additional costs for the line network on fluid lines to see. In particular in the case of narrow installation conditions, there are also problems in accommodating the large number of components mentioned and connecting them in a fluid-conducting manner. In addition, since various manufacturers are responsible for the hydraulic accumulators, the piping and / or the valves of the valve control unit, there are difficulties with adaptation, in particular at the points of installation on site.
Durch die DE-A-27 07 469 ist ein gattungsgemäßer Hydrospeicher bekannt, insbesondere in Form einer Vorrichtung zum Druckregulieren. Der bekannte Hydrospeicher löst die Aufgaben einerseits den Druck im Speicher auf einem gegebenen Druck zu halten, andererseits den genannten Speicher gegen jeden zufälligen Überdruck zu schützen. Hierfür. weist der bekannte Hydrospeicher innerhalb einer Ventilaufnahme die sich in Längsachse des Hydrospeichers erstreckt, einen Ventilschieber in der Art einer hohlenA generic hydraulic accumulator is known from DE-A-27 07 469, in particular in the form of a device for pressure regulation. The known hydraulic accumulator solves the tasks on the one hand of keeping the pressure in the accumulator at a given pressure, and on the other hand protecting the accumulator against any accidental overpressure. Therefor. the known hydraulic accumulator has a valve slide in the manner of a hollow within a valve receptacle which extends in the longitudinal axis of the hydraulic accumulator
Büchse auf, die in ihrer Mitte den hohen Druck empfängt und die an einem ihrer Enden dem zu regulierenden Betriebsdruck ausgesetzt ist. An ihrem anderen Ende ruht sie an einem Stützkörper an dem eine justierbare Feder eine Gegenhaltekraft aufbringt. Da die Fläche des Berührungskreises zwi- sehen der Büchse und dem Stützkörper kleiner als die Fläche des Querschnitts der Büchse selbst ist, rufen die Verstellungen der Büchse gegen die Feder das Schließen der Einlaßöffnung im Sinne eines Schaltventiles hervor, durch die der hohe Druck eintritt. Die bekannte Ventilanordnung ist inte- graler Bestandteil der unteren Gehäusehälfte des Speichers, welche mit der oberen Gehäusehälfte unter Bildung des Hydrospeichergehäuses ver- schraubbar ist. Das Trennelement ist bei der bekannten Lösung aus einer gummielastischen Membran gebildet, die mittig mit einem Schließkörper versehen ist, so daß in Bewegungsrichtung des Trennelementes auch die Schaltrichtung des Schaltventiles verläuft. Kommt es zu einem Versagen des Schaltventiles bei der bekannten Lösung, ist zu Wartungszwecken die Ventilsteuereinheit die das Schaltventil enthält, zusammen mit der unteren Gehäusehälfte zu entfernen oder für einen entsprechenden Austausch vorzusehen, was die Herstell- und Wartungskosten bei der bekannten Lösung erhöht. Obwohl die Ventilsteuereinheit mit dem bekannten Schaltventil geometrisch groß dimensioniert ist, läßt sich nur eine Ventilfunktion bezogen auf die Ansteuerung des Trennelementes ausüben.Bushing which receives the high pressure in its center and which is exposed to the operating pressure to be regulated at one of its ends. At its other end, it rests on a support body to which an adjustable spring applies a counterforce. Since the area of the contact circle between see the sleeve and the support body is smaller than the area of the cross section of the sleeve itself, the adjustments of the sleeve against the spring cause the closing of the inlet opening in the sense of a switching valve through which the high pressure occurs. The known valve arrangement is an integral part of the lower housing half of the accumulator, which can be screwed to the upper housing half to form the hydraulic accumulator housing. In the known solution, the separating element is formed from a rubber-elastic membrane which is provided in the center with a closing body, so that the switching direction of the switching valve also runs in the direction of movement of the separating element. If the switching valve fails in the known solution, the valve control unit containing the switching valve, together with the lower housing half, must be removed for maintenance purposes or provided for a corresponding replacement, which increases the manufacturing and maintenance costs in the known solution. Although the valve control unit with the known switching valve is geometrically large, only one valve function can be carried out in relation to the control of the separating element.
Zwar ist in der DE-A-39 41 241 bereits bei einem Kolbendruckspeicher, insbesondere für antriebsschlupfgeregelte Bremsanlagen vorgeschlagen worden, ein Schaltventil in Form eines Ladeventiles mit seiner Bewegungsrichtung in platzsparender Weise quer zur Bewegungsrichtung eines Druckspeicherkolbens sowie eines diesen umschließenden Formteiles als Trennelement des Speichers vorzusehen und diesen über einen Kontrollschalter als Bewegungssensor für das Formteil in einem Ventilblock der Ventilsteuereinheit des Kolbendruckspeichers anzuordnen; allein auch bei dieser bekannten Anordnung wird nur eine Schaltaufgabe gelöst und im Hinblick auf den Quereinbau des Schaltventiles wird immer noch relativ viel Bauraum für die Ventilsteuereinheit benötigt. Ferner verlangt der Quereinbau eine Umlegung des Fluidstromes, was aus strömungstechnischer Sicht heraus sich als ungünstig erweist.In DE-A-39 41 241, it has already been proposed in a piston pressure accumulator, in particular for brake slip-controlled brake systems, to provide a switching valve in the form of a charging valve with its direction of movement in a space-saving manner transversely to the direction of movement of a pressure accumulator piston and a molded part enclosing it as a separating element of the accumulator and to arrange this via a control switch as a motion sensor for the molded part in a valve block of the valve control unit of the piston pressure accumulator; even with this known arrangement, only one switching task is solved and with regard to the transverse installation of the switching valve, a relatively large amount of installation space is still required for the valve control unit. Furthermore, the transverse installation requires one Redirection of the fluid flow, which proves to be unfavorable from a fluidic point of view.
Ausgehend von diesem Stand der Technik liegt daher der Erfindung die Aufgabe zugrunde, die beschriebenen Nachteile vermeiden zu helfen, insbesondere einen Hydrospeicher zu schaffen, der insgesamt wenig Einbauraum benötigt, der eine günstige Fluidführung der zu beherrschenden Fluidströme ermöglicht und der dennoch kostengünstig in der Herstellung und in der Wartung ist. Eine dahingehende Aufgabe löst ein Hydrospeicher mit den Merkmalen des Patentanspruches 1 in seiner Gesamtheit.Starting from this prior art, the invention is based on the object of helping to avoid the disadvantages described, in particular to create a hydraulic accumulator which overall requires little installation space, which enables favorable fluid management of the fluid streams to be controlled and which is nevertheless inexpensive to manufacture and is in maintenance. A related problem is solved by a hydraulic accumulator with the features of claim 1 in its entirety.
Dadurch, daß gemäß dem kennzeichnenden Teil des Patentanspruches 1 die Ventilsteuereinheit in einem zum Gehäuse eigenständigen Ventilblock aufgenommen ist, daß der Ventilblock eine weitere Aufnahme für ein wei- teres Schaltventil aufweist, das eine andere Schaltaufgabe löst, und daß die Ventilaufnahmen im wesentlichen gleich ausgebildet und außermittig der Längsachse des Hydrospeichers angeordnet sind, für den modularen Einsatz der als Gleichteile ausgebildeten Schaltventile, läßt sich trotz geringer geometrischer Abmessungen der Ventilsteuereinheit eine Mehrzahl von Schalt- funktionen bezogen auf einen Hydrospeicher erreichen. So kann insbesondere das eine Schaltventil der Ansteuerung des Trennelementes dienen und das jeweils andere Schaltventil für andere Aufgaben herangezogen werden, beispielsweise auch für die Ansteuerung des Gasvolumens im Gasraum des Hydrospeichers. Sofern der erfindungsgemäße Hydrospeicher in Gesamt- Vorrichtungen Anwendung findet, kann das jeweils weitere Schaltventil auch andere Schaltaufgaben lösen, bezogen auf benachbarte fluidtechni- sche Einrichtungen, beispielsweise in Form von Kühlpumpen, Hydrozylin- dereinrichtungen etc. Da die Schaltrichtung der Schaltventile parallel zur Bewegungsrichtung des Trennelementes erfolgt sowie in Längsrichtung des Hydrospeichers, ist eine günstige fluidführende Beherrschung der Fluidströme ohne Umlenkung erreicht. Da sowohl die Ventilaufnahmen als auch die Schaltventile selbst in der Art von Gleichteilen aufgebaut sind, läßt sich die Ventilsteuereinheit und mithin der Hydrospeicher sehr kostengünstig ausbilden. Wird für eine bestimmte Verwendung des Hydrospeichers ein bestimmtes Schaltventil. nicht benötigt, kann dieses auch einfach weggelassen und durch Blindstopfen die Aufnahme abgeschlossen oder sonstwie für die Fluidführung einge- setzt werden. Kommt es zu einem Ausfall des eigentlichen Hydrospeichers oder seiner Ventilsteuereinheit, lassen sich diese ohne weiteres voneinander trennen und durch neue Bauteile ersetzen, so daß die Gesamtfunktion der hydraulischen Anlage in der der Hydrospeicher Verwendung nicht gefährdet ist.Characterized in that, according to the characterizing part of patent claim 1, the valve control unit is accommodated in a valve block that is independent of the housing, that the valve block has a further receptacle for a further switching valve that solves another switching task, and that the valve receptacles are essentially the same and are arranged off-center of the longitudinal axis of the hydraulic accumulator, for the modular use of the switching valves designed as identical parts, a plurality of switching functions related to a hydraulic accumulator can be achieved despite the small geometric dimensions of the valve control unit. In particular, one switching valve can be used to control the separating element and the other switching valve can be used for other tasks, for example also for controlling the gas volume in the gas space of the hydraulic accumulator. If the hydraulic accumulator according to the invention is used in overall devices, the respective additional switching valve can also perform other switching tasks, based on neighboring fluid technology devices, for example in the form of cooling pumps, hydrocylinder devices, etc. Since the switching direction of the switching valves is parallel to the direction of movement of the separating element and in the longitudinal direction of the hydraulic accumulator, it is possible to control the fluid flows in a fluid-efficient manner without deflection. Since both the valve receptacles and the switching valves themselves are constructed in the manner of identical parts, the valve control unit and consequently the hydraulic accumulator can be designed very inexpensively. Is a specific switching valve for a specific use of the hydraulic accumulator. If it is not required, this can simply be omitted and the receptacle closed with blind plugs or used in some other way for the fluid guidance. If there is a failure of the actual hydraulic accumulator or its valve control unit, these can be easily separated from one another and replaced by new components, so that the overall function of the hydraulic system in which the hydraulic accumulator is used is not endangered.
Bei einer bevorzugten Ausführungsform des erfindungsgemäßen Hydrospeichers ist es vorgesehen, daß die jeweiligen Schaltventile in diametraler Anordnung zur Längsachse des Hydrospeichers in der Ventilsteuereinheit aufgenommen sind. Aufgrund der dahingehenden Gleichanordnung ist beim Schaltvorgang des jeweiligen Schaltventiles, insbesondere bei gleichzeitiger Schaltbewegung, eine vibrationsfreie Einleitung des Schaltvorganges in das Grundgehäuse des Hydrospeichers erreicht.In a preferred embodiment of the hydraulic accumulator according to the invention, it is provided that the respective switching valves are accommodated in the valve control unit in a diametrical arrangement with respect to the longitudinal axis of the hydraulic accumulator. Because of the similar arrangement in this respect, a vibration-free initiation of the switching process into the basic housing of the hydraulic accumulator is achieved during the switching process of the respective switching valve, in particular with a simultaneous switching movement.
Bei einer besonders bevorzugten Ausführungsform des erfindungsgemäßen Hydrospeichers greift der Steuerblock mit seinem Fortsatz und in bündiger Anlage mit dem Innenumfang des Speichergehäuses in dieses ein, wobei das Speichergehäuse mit seinem einen freien Ende an einem Absatz des Steuerblockes anliegt, an dem der Fortsatz beginnt. Hierdurch läßt sich eine sichere Abdichtung der Verbindung zwischen Speichergehäuse und Steuer- blockfortsatz erreichen. Des weiteren ist über den Absatz eine genaue Anlage des Speichergehäuses mit dem sonstigen Steuerblock möglich und das Speichergehäuse ist längs des Fortsatzes des Steuerblockes sicher geführt. Eine ungewollte Trennung von Speichergehäuse und Ventilsteuereinheit ist somit mit Sicherheit vermieden.In a particularly preferred embodiment of the hydraulic accumulator according to the invention, the control block engages with its extension and in flush contact with the inner circumference of the accumulator housing, the accumulator housing resting with its one free end on a shoulder of the control block at which the extension begins. This allows a secure seal of the connection between the storage housing and control reach the block process. Furthermore, an exact contact of the storage housing with the other control block is possible via the shoulder and the storage housing is securely guided along the extension of the control block. An undesired separation of the storage housing and valve control unit is thus avoided with certainty.
Bei einer weiteren bevorzugten Ausführungsform des erfindungsgemäßen Hydrospeichers begrenzt der Steuerblock mit seinem Fortsatz den Fluidraum, wobei der Steuerblock mindestens einen Fluidkanal aufweist, der mit seinem einen freien Ende in den Fluidraum mündet und mit seinem anderen freien Ende an das Schaltventil angeschlossen ist. Da der Steuerblock unmittelbar in den Fluidraum übergeht, sind die freien Wege für das Druckmedium gering bemessen und somit sind schnelle Reaktionszeiten für den Hydrospeicher erreicht.In a further preferred embodiment of the hydraulic accumulator according to the invention, the control block delimits the fluid space with its extension, the control block having at least one fluid channel which opens into the fluid space with its one free end and is connected to the switching valve with its other free end. Since the control block merges directly into the fluid space, the free paths for the pressure medium are small and thus fast response times for the hydraulic accumulator are achieved.
Weitere vorteilhafte Ausführungsformen sind Gegenstand der Unteransprüche.Further advantageous embodiments are the subject of the dependent claims.
Im folgenden wird der erfindungsgemäße Hydrospeicher anhand der Zeichnung näher erläutert.The hydraulic accumulator according to the invention is explained in more detail below with reference to the drawing.
Es zeigt in prinzipieller und nicht maßstäblicher Darstellung die einzige Figur, teilweise im Schnitt, teilweise in Ansicht, eine Längsdarstellung auf den Hydrospeicher.In principle and not to scale, it shows the only figure, partly in section, partly in view, a longitudinal representation of the hydraulic accumulator.
Der Hydrospeicher nach der Figur ist in der Art eines Kolbenspeichers ausgebildet. Dieser weist ein Speichergehäuse 10 auf mit einem darin angeordneten Gasraum 12 und einem Fluidraum 14. Der Gasraum 12 ist gegenüber dem Fluidraum 14 über ein Trennelement 16 in Form eines Kolben- teils getrennt, das längsverschiebbar entlang des Innenumfangs des Speichergehäuses 10 geführt ist, so daß das Verhältnis von Gasraum 12 zu Fluidraum 14 veränderlich gehalten ist. Um eine größere Gasmenge an Arbeitsgas in dem Gasraum 12 bevorraten zu können, ist das Trennelement 16 als Hohlteil ausgebildet und weist im Inneren eine entsprechende Ausnehmung 18 auf. In Blickrichtung auf die Figur gesehen ist der Gasraum 12 nach oben hin von einem Deckelteil 20 abgeschlossen, das über eine Mittenbohrung 22 verfügt, über die ein Arbeitsgas, beispielsweise Stickstoffgas, in den Gasraum 12 einbringbar ist. Die dahingehende Mittenbohrung 22 wird dann über ein Abschlußventil od. dgl. (nicht dargestellt) gasdicht verschlossen, wobei über das Abschlußyentil auch von Zeit zu Zeit die Gasmenge im Gasraum 12 nachprüfbar und nachfüllbar ist.The hydraulic accumulator according to the figure is designed in the manner of a piston accumulator. This has a storage housing 10 with a gas space 12 arranged therein and a fluid space 14. The gas space 12 is opposite the fluid space 14 via a separating element 16 in the form of a piston partly separated, which is guided in a longitudinally displaceable manner along the inner circumference of the storage housing 10, so that the ratio of the gas space 12 to the fluid space 14 is kept variable. In order to be able to store a larger amount of working gas in the gas space 12, the separating element 16 is designed as a hollow part and has a corresponding recess 18 in the interior. When viewed in the direction of the figure, the gas space 12 is closed at the top by a cover part 20, which has a central bore 22 through which a working gas, for example nitrogen gas, can be introduced into the gas space 12. The relevant central bore 22 is then sealed gas-tight via a shut-off valve or the like (not shown), the amount of gas in the gas space 12 being able to be checked and refilled from time to time via the shut-off valve.
Am gegenüberliegenden Ende des Speichergehäuses 10 schließt sich in der Art eines Steuerblockes 24 die als Ganzes mit 26 bezeichnete Ventilsteuereinheit an. Die Ventilsteuereinheit 26 verfügt über zwei Schaltventile/wobei das erste Schaltventil mit 28 und das zweite Schaltventil mit dem Bezugszeichen 30 versehen ist. Die dahingehende Ventilsteuereinheit 26 ist mithin integraler Bestandteil des Speichergehäuses 10, wobei hierfür der Steuerblock 24 mit einem Vorsprung 32 versehen ist, der in bündiger Anlage mit dem Innenumfang des Speichergehäuses 10 in dieses eingreift. Ferner ist vorgesehen, daß das Speichergehäuse 10 mit seinem einen freien Ende 34 an einem Absatz 36 des Steuerblockes 24 anliegt, an dem der Fortsatz 32 beginnt. Gegenüber dem sonstigen Außendurchmesser des Steuer- blockes 24 ist mithin der in das Speichergehäuse 10 eingreifende Fortsatz 32 im Durchmesser gemäß der Rückstufung über den Absatz 36 reduziert.At the opposite end of the storage housing 10, the valve control unit, designated as a whole by 26, is connected in the manner of a control block 24. The valve control unit 26 has two switching valves / whereby the first switching valve is provided with 28 and the second switching valve with the reference symbol 30. The relevant valve control unit 26 is therefore an integral part of the storage housing 10, the control block 24 being provided for this purpose with a projection 32 which engages in flush contact with the inner circumference of the storage housing 10. It is further provided that the storage housing 10 rests with its one free end 34 on a shoulder 36 of the control block 24, at which the extension 32 begins. Compared to the other outer diameter of the control block 24, the extension 32 engaging in the storage housing 10 is therefore reduced in diameter in accordance with the downgrading via the shoulder 36.
Der erfindungsgemäße Hydrospeicher ist also dadurch charakterisiert, daß die Ventilsteuereinheit 26 in einem zum Gehäuse 10 eigenständigen Ven- tilblock 24 aufgenommen ist, daß der Ventilblock 24 eine weitere Ventilaufnahme 31 für ein weiteres Schaltventil 30 aufweist, das eine andere Schaltaufgabe löst, und daß die Ventilaufnahmen 29,31 im wesentlichen gleich ausgebildet und außermittig der Längsachse 33 des Hydrospeichers angeordnet sind für den modularen Einsatz der als Gleichteile ausbildbaren Schaltventile 28,30.The hydraulic accumulator according to the invention is therefore characterized in that the valve control unit 26 in a valve that is independent of the housing 10. tilblock 24 is included that the valve block 24 has a further valve receptacle 31 for a further switching valve 30, which solves another switching task, and that the valve receptacles 29, 31 are essentially of the same design and are arranged off-center of the longitudinal axis 33 of the hydraulic accumulator for modular use of the switching valves 28, 30 which can be formed as identical parts.
Der Steuerblock 24 begrenzt mit dem oberen Ende des Fortsatzes 32 den Fluidraum 14 in Blickrichtung auf die Figur gesehen nach unten. Das Spei- chergehäuse 10, die Räume 12 und 14, das Deckelteil 20, das Kolbenteil 16 sowie der Fortsatz 32 sind im wesentlichen als zylindrische Bauteile ausgebildet und erstrecken sich entlang einer gemeinsamen Längsachse 38 des Hydrospeichers. Der Steuerblock 24 weist des weiteren einen Fluidkanal 40 auf, der außermittig zu der Längsachse 38 angeordnet ist und der mit seinem einen freien Ende in den Fluidraum 14 mündet und mit seinem anderen freien Ende an das erste Schaltventil 28 angeschlossen ist. Quer zu dem Fluidkanal 40 verlaufend ist in dem Steuerblock 24 ein Queranschluß 42 vorhanden, an den eine Fluidzuleitung, beispielsweise als Bestandteil eines hydraulischen Kreises, anschließbar wäre. Zwischen dem Queran- Schluß 42 und dem Fluidkanal 40 ist dann das erste Schaltventil 28 angeschlossen, wobei in einer Schaltstellung die fluidführende Verbindung zwischen Queranschluß 42 und Fluidkanal 40 freigegeben ist und in der anderen Schaltstellung als gesperrt gilt. Vorzugsweise ist demgemäß das erste Schaltventil 28 als sog. 2/2-Wege- Ventil ausgebildet. Es wäre aber auch denkbar, hier andere Ventile, wie Wege-Schieber- Ventile, Ventile mit Dämpfungen od. dgl., einzubauen in Abhängigkeit vom jeweiligen Verwendungszweck. In gleichgerichteter Einbaulage zu dem ersten Schaltventil 28 ist neben diesem ein weiteres zweites Schaltventil 30 angeordnet, das im vorliegenden Fall gleichfalls in der Art eines 2/2-Wege-Ventils ausgebildet ist. Das zweite Schaltventil 30 weist zwei Seitenanschlüsse 44,46 auf, die wie der Queran- Schluß 42 in radialer Richtung seitlich aus dem Steuerblock 24 austreten. Die beiden Seitenanschlüsse 44,46 sind wiederum über die Schaltteile des zweiten Schaltventils 30 voneinander getrennt. Bei durchgeschaltetem zweiten Schaltventil 30 sind die Seitenanschlüsse 44,46 fluidführend miteinander verbunden oder in sperrender Stellung des Ventils voneinander getrennt. Mit dem dahingehenden zweiten Schaltventil 30 ließe sich beispielsweise bei einer nicht näher dargestellten Ausführungsform der Ein- und Auslaß des Arbeitsgases im Gasraum 12 ansteuern, sofern man die Anschlüsse 44,46 fluidführend über Verbindungsstellen im Deckelteil 20 mit dem Gasraum 12 verbinden würde. Bei einer anderen, nicht näher darge- stellten Ausführungsform kann es darüber hinaus möglich sein, daß das zweite Schaltventil 30 eine andere Baugruppe im hydraulischen Kreis ansteuert, beispielsweise in Form eines hydraulischen Arbeitszylinders od. dgl..With the upper end of the extension 32, the control block 24 delimits the fluid space 14 downward as viewed in the figure. The accumulator housing 10, the spaces 12 and 14, the cover part 20, the piston part 16 and the extension 32 are essentially designed as cylindrical components and extend along a common longitudinal axis 38 of the hydraulic accumulator. The control block 24 also has a fluid channel 40, which is arranged eccentrically to the longitudinal axis 38 and which opens into the fluid space 14 with its one free end and is connected to the first switching valve 28 with its other free end. A transverse connection 42 is present in the control block 24 and extends across the fluid channel 40, to which a fluid supply line, for example as part of a hydraulic circuit, could be connected. The first switching valve 28 is then connected between the transverse connection 42 and the fluid channel 40, the fluid-carrying connection between the transverse connection 42 and the fluid channel 40 being released in one switching position and being considered blocked in the other switching position. Accordingly, the first switching valve 28 is preferably designed as a so-called 2/2-way valve. However, it would also be conceivable to install other valves here, such as directional spool valves, valves with damping or the like, depending on the respective intended use. In the same-oriented installation position with respect to the first switching valve 28, a further second switching valve 30 is arranged next to it, which in the present case is likewise designed in the manner of a 2/2-way valve. The second switching valve 30 has two side connections 44, 46 which, like the cross connection 42, emerge laterally from the control block 24 in the radial direction. The two side connections 44, 46 are in turn separated from one another via the switching parts of the second switching valve 30. When the second switching valve 30 is switched on, the side connections 44, 46 are connected to one another in a fluid-carrying manner or are separated from one another in the blocking position of the valve. With the second switching valve 30 in question, the inlet and outlet of the working gas in the gas space 12 could be controlled, for example, in an embodiment that is not shown in more detail, provided that the connections 44, 46 were connected to the gas space 12 in a fluid-carrying manner via connection points in the cover part 20. In another, not shown embodiment, it may also be possible for the second switching valve 30 to actuate another assembly in the hydraulic circuit, for example in the form of a hydraulic working cylinder or the like.
In der vorliegenden Ausführungsform sind die Schaltventile 28,30 als Magnetventile 48 ausgebildet, die über Anschlüsse 50 elektrisch ansteuerbar sind. Da dahingehende Magnetventile 48 zum Stand der Technik zählen, wird an dieser Stelle hierauf nicht mehr näher eingegangen.In the present embodiment, the switching valves 28, 30 are designed as solenoid valves 48, which can be electrically controlled via connections 50. Since solenoid valves 48 in this regard belong to the prior art, no further details will be given here.
Mit dem erfindungsgemäßen Hydrospeicher ist eine Komplettlösung realisiert, die eine kompakte Bauausführung erlaubt. In der gezeigten Ausführungsform sind die ersten und zweiten Schaltventile 28 bzw. 30 im wesentlichen axial parallel zur Längsachse 38 des Hydrospeichers im Steuerblock 24 angeordnet. Es wären aber auch andere Einbaulagen, insbesondere in radialer Richtung, quer zur Längsachse 38 möglich. Aufgrund des bündigen Anschlusses des Speichergehäuses 10 an den Steuerblock 24 sind Leckagen vermieden und eine aufwendige teure Verrohrung kann entfallen. Da der Steuerblock 24 mit seinem Fortsatz 32 unmittelbar in den Fluidraum 14 des Speichergehäuses 10 eingreift, ist insbesondere das erste Schaltventil 28 in unmittelbarer Nähe zu dem Fluidraum 14 angeordnet und nur über den in der Baulänge kurz gehaltenen Fluidkanal 40 getrennt, so daß mit sehr kurzen Ansteuerzeiten für den Hydrospeicher zu rechnen ist. With the hydraulic accumulator according to the invention, a complete solution is implemented which allows a compact construction. In the embodiment shown, the first and second switching valves 28 and 30 are arranged essentially axially parallel to the longitudinal axis 38 of the hydraulic accumulator in the control block 24. But there would also be other installation positions, especially in radial direction, transverse to the longitudinal axis 38 possible. Due to the flush connection of the storage housing 10 to the control block 24, leaks are avoided and complex, expensive piping can be dispensed with. Since the control block 24 engages with its extension 32 directly in the fluid space 14 of the storage housing 10, the first switching valve 28 is in particular arranged in the immediate vicinity of the fluid space 14 and separated only via the fluid channel 40, which is kept short in length, so that it is very short Actuation times for the hydraulic accumulator can be expected.

Claims

P a t e n t a n s p r ü c h e Patent claims
1 . Hydrospeicher, insbesondere Kolbenspeicher, mit einem Speichergehäuse (10) und mit mindestens einem darin angeordneten Gasraum (12) und einem Fluidraum (14), die über ein Trennelement (16) voneinander getrennt sind, wobei mindestens einer dieser Räume (12,14) über eine mindestens ein Schaltventil (28,30) aufweisende Ventilsteuereinheit (26) mit einem Druckmedium befüllbar oder von diesem zumindest teilweise entleerbar ist und wobei das jeweilige Schaltventil (28) in einer zugehörigen Ventilaufnahme (29) untergebracht ist, das in Bewegungsrichtung des Trennelementes (16) von einer Öffnungsstellung in eine Schließstellung und umgekehrt bewegbar ist, dadurch gekennzeichnet, daß die Ventilsteuereinheit (26) in einem zum Gehäuse (10) eigenständigen Ventilblock (24) aufgenommen ist, daß der Ventilblock (24) eine weitere Ventilaufnahme (31 ) für ein weiteres Schaltventil (30) aufweist, das eine andere Schaltaufgabe löst, und daß die Ventilaufnahmen (29,31 ) im wesentlichen gleich ausgebildet und außermittig der Längsachse (33) des Hydrospeichers angeordnet sind für den modularen Einsatz der als Gleichteile ausgebildeten Schaltventile (28,30).1 . Hydraulic accumulator, in particular piston accumulator, with a storage housing (10) and with at least one gas space (12) and a fluid space (14) arranged therein, which are separated from one another by a separating element (16), at least one of these spaces (12, 14) being separated a valve control unit (26) having at least one switching valve (28, 30) can be filled with a pressure medium or at least partially emptied from it, and the respective switching valve (28) is accommodated in an associated valve receptacle (29) which is in the direction of movement of the separating element (16 ) can be moved from an open position to a closed position and vice versa, characterized in that the valve control unit (26) is accommodated in a valve block (24) which is independent of the housing (10), that the valve block (24) has a further valve receptacle (31) for a has another switching valve (30) which solves another switching task, and that the valve seats (29,31) are essentially the same ch formed and arranged off-center of the longitudinal axis (33) of the hydraulic accumulator for the modular use of the switching valves (28, 30) designed as identical parts.
2. Hydrospeicher nach Anspruch 1 , dadurch gekennzeichnet, daß der Steuerblock (24) mit einem Fortsatz (32) und in bündiger Anlage mit dem Innenumfang des Speichergehäuses (10) in dieses eingreift und daß das Speichergehäuse (10) mit seinem einen freien Ende (34) an einem Absatz (36) des Steuerblockes (24) anliegt, an dem der Fortsatz (32) beginnt. 2. Hydraulic accumulator according to claim 1, characterized in that the control block (24) engages with an extension (32) and in flush contact with the inner circumference of the accumulator housing (10) and that the accumulator housing (10) with its one free end ( 34) abuts on a shoulder (36) of the control block (24) at which the extension (32) begins.
3. Hydrospeicher nach Anspruch 2, dadurch gekennzeichnet, daß der Steuerblock (24) mit seinem Fortsatz (32) den Fluidraum (14) begrenzt und daß der Steuerblock (24) mindestens einen Fluidkanal (40) aufweist, der mit seinem einen freien Ende in den Fluidraum (14) mündet und mit seinem anderen freien Ende an das Schaltventil (28) angeschlossen ist.3. Hydraulic accumulator according to claim 2, characterized in that the control block (24) with its extension (32) delimits the fluid space (14) and that the control block (24) has at least one fluid channel (40) with its one free end in the fluid chamber (14) opens and is connected with its other free end to the switching valve (28).
4. Hydrospeicher nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das weitere Schaltventil (30) an den Gasraum (12) angeschlossen ist und den Ein- und Auslaß des Arbeitsgases ansteuert oder für eine andere Baugruppe die Fluidsteuerung übernimmt.4. Hydraulic accumulator according to one of claims 1 to 3, characterized in that the further switching valve (30) is connected to the gas space (12) and controls the inlet and outlet of the working gas or takes over the fluid control for another assembly.
5. Hydrospeicher nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Schaltventile (28,30) als 2/2-Wege-Ventile ausgebildet sind.5. Hydraulic accumulator according to one of claims 1 to 4, characterized in that the switching valves (28,30) are designed as 2/2-way valves.
6. Hydrospeicher nach Anspruch 5, dadurch gekennzeichnet, daß die 2/2- Wege-Ventile in der Art von Magnetventilen (48) ausgebildet und elektrisch ansteuerbar sind.6. Hydraulic accumulator according to claim 5, characterized in that the 2/2-way valves are designed in the manner of solenoid valves (48) and can be controlled electrically.
7. Hydrospeicher nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß er als Kolbenspeicher mit einem Trennkolben als Trennelement (16) ausgebildet ist.7. Hydraulic accumulator according to one of claims 1 to 6, characterized in that it is designed as a piston accumulator with a separating piston as a separating element (16).
8. Hydrospeicher nach einem der Ansprüche 1 bis 7, dadurch gekenn- zeichnet, daß das Speichergehäuse (10) und der Steuerblock (24) im wesentlichen als zylindrische Bauteile ausgebildet sind.8. Hydraulic accumulator according to one of claims 1 to 7, characterized in that the accumulator housing (10) and the control block (24) are designed essentially as cylindrical components.
9. Hydrospeicher nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Schaltventile (28,30) unabhängig von der durch die Druckverhältnisse bedingten Lage des Trennelementes (16) schaltbar sind. 9. Hydraulic accumulator according to one of claims 1 to 8, characterized in that the switching valves (28,30) regardless of the through which Pressure conditions related position of the separating element (16) are switchable.
EP01994545A 2000-11-16 2001-11-07 Hydraulic accumulator Expired - Lifetime EP1334280B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10057746A DE10057746A1 (en) 2000-11-16 2000-11-16 hydraulic accumulator
DE10057746 2000-11-16
PCT/EP2001/012842 WO2002040871A2 (en) 2000-11-16 2001-11-07 Hydraulic accumulator

Publications (2)

Publication Number Publication Date
EP1334280A2 true EP1334280A2 (en) 2003-08-13
EP1334280B1 EP1334280B1 (en) 2005-08-10

Family

ID=7664117

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01994545A Expired - Lifetime EP1334280B1 (en) 2000-11-16 2001-11-07 Hydraulic accumulator

Country Status (7)

Country Link
US (2) US20020056275A1 (en)
EP (1) EP1334280B1 (en)
JP (1) JP2004514096A (en)
AT (1) ATE301777T1 (en)
DE (2) DE10057746A1 (en)
ES (1) ES2246352T3 (en)
WO (1) WO2002040871A2 (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10248591B4 (en) 2002-10-17 2006-04-20 Bos Gmbh & Co. Kg Window blind with lid on the pull-out slot
DE10330516B3 (en) * 2003-07-05 2004-10-21 Hydac Technology Gmbh Hydraulic accumulator, especially a piston-type accumulator, used in a spring system in vehicles comprises an accumulator housing having a free end terminated by a valve block provided with a ball valve
DE10333014A1 (en) * 2003-07-18 2005-02-03 Volkswagen Ag Hydraulic oil pressure reservoir for automobile hydraulics with valves for hydraulic pressure circuit combined with pressure reservoir connection fitting
DE10351386A1 (en) * 2003-11-04 2005-06-09 Bauer Maschinen Gmbh Transmission and method for controlling an internal pressure in the transmission
DE102004028868A1 (en) * 2004-06-15 2006-01-05 Ina-Schaeffler Kg Internal combustion engine with a hydraulic device for adjusting the rotational angle of a camshaft relative to a crankshaft
JP4583261B2 (en) * 2005-06-30 2010-11-17 株式会社クボタ Accumulator mounting structure for loader work machine
US7661442B2 (en) * 2007-06-14 2010-02-16 Limo-Reid, Inc. Compact hydraulic accumulator
US7740455B1 (en) 2007-07-09 2010-06-22 Brian Nissen Pumping system with hydraulic pump
NO329959B1 (en) * 2008-08-29 2011-01-31 Tool Tech As Procedure for using new flushing ports when cleaning a piston accumulator
CN102575759B (en) * 2009-10-19 2015-07-29 贺德克技术有限公司 The device of the Fluid Volume in storage housing can be stored in for pulsed release
EP2630399A2 (en) 2010-09-22 2013-08-28 Limo-Reid, Inc. Ultra lightweight and compact accumulator
US8567444B2 (en) * 2010-10-08 2013-10-29 GM Global Technology Operations LLC Accumulator assembly
US8602063B2 (en) * 2011-02-08 2013-12-10 Hamilton Sundstrand Corporation Gas over liquid accumulator
US8991546B2 (en) * 2013-03-21 2015-03-31 Deere & Company Work vehicle with fluid attentuator
JP6658218B2 (en) * 2016-03-31 2020-03-04 アイシン・エィ・ダブリュ株式会社 Switching device for accumulator and accumulator
US9885373B1 (en) 2016-10-11 2018-02-06 Honeywell International Inc. Leak-free piston style accumulator
DE102016226304A1 (en) * 2016-12-29 2018-07-05 Robert Bosch Gmbh Hydraulic block for a hydraulic unit of a brake control of a hydraulic vehicle brake system
DE102017002079B4 (en) 2017-03-04 2019-03-14 Hydrosaar Gmbh Impact crushing plant
EP3689105A1 (en) 2017-09-29 2020-08-05 John Bean Technologies Limited Radio frequency and impingement processing apparatus and method
DE102020005257A1 (en) 2020-08-27 2022-03-03 Hydac Technology Gmbh piston accumulator

Family Cites Families (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2828760A (en) * 1953-05-19 1958-04-01 British Messier Ltd Automatic cut-outs for hydraulic circuits
US2986158A (en) * 1955-09-03 1961-05-30 Gratzmuller Jean Louis Self-draining hydraulic energy accumulator
US3077898A (en) * 1959-01-28 1963-02-19 Racine Hydraulics And Machiner Fluid relief valve
US3077896A (en) * 1959-10-01 1963-02-19 Archie E Weingard Multiple seat valve
GB1183477A (en) * 1967-09-15 1970-03-04 Hydrotrole Ltd Hydropneumatic Accumulator
US3967782A (en) * 1968-06-03 1976-07-06 Gulf & Western Metals Forming Company Refrigeration expansion valve
GB1288952A (en) * 1969-02-08 1972-09-13
US3741692A (en) * 1970-12-17 1973-06-26 Rupp Co Warren Surge suppressor for fluid lines
US3804125A (en) * 1972-09-28 1974-04-16 Bendix Corp Pump pulsation dampener
GB1581441A (en) * 1976-01-29 1980-12-17 Dobson Park Ind Fluid powered impact tools
FR2341891A1 (en) * 1976-02-23 1977-09-16 Leduc Gerard Filling and safety valve for hydraulic vessel - has sliding sleeve and pressure relief end cap held by single spring
US4162692A (en) * 1976-09-07 1979-07-31 Hydrotrole Limited Hydro-pneumatic flexible bladder accumulator
US4207563A (en) * 1978-06-08 1980-06-10 Midland-Ross Corporation Gas charged accumulator with failure indicator
US4186777A (en) * 1978-10-27 1980-02-05 Deere & Company Pressure vessel retained energy measurement system
JPS5725502A (en) * 1980-07-21 1982-02-10 Toshiba Mach Co Ltd Accumulator with automatic closing valve
US4487226A (en) * 1982-08-12 1984-12-11 Vsi Corporation Failure sensing hydraulic accumulator and system
US4966200A (en) * 1989-01-25 1990-10-30 Iowa Industrial Hydraulics, Inc. Tie bolt accumulator with safety valve
JPH02266101A (en) * 1989-04-05 1990-10-30 Nhk Spring Co Ltd Accumulator
DE3941241C2 (en) * 1989-12-14 2002-03-21 Continental Teves Ag & Co Ohg Piston pressure accumulator, in particular for brake systems controlled by drive slip, and a switching arrangement therefor
US5205326A (en) * 1991-08-23 1993-04-27 Hydraulic Power Systems, Inc. Pressure response type pulsation damper noise attenuator and accumulator
JPH05185822A (en) * 1991-08-30 1993-07-27 Tokico Ltd Car height control device
DE4231991A1 (en) 1992-09-24 1994-03-31 Bilstein August Gmbh Co Kg Dynamic spring element for vehicle hydraulic shock absorber with hydropneumatic level regulator - has electromagnetically-operated valve device between two gas spaces
DE4318553C2 (en) * 1993-06-04 1995-05-18 Daimler Benz Ag Adaptive hydropneumatic pulsation damper
FR2750652B1 (en) * 1996-07-04 1998-11-13 Peugeot SYSTEM FOR CONTROLLING A HYDROPNEUMATIC SUSPENSION OF A MOTOR VEHICLE
US6478051B1 (en) * 1998-11-25 2002-11-12 Continental Teves Ag & Co., Ohg Pressure means storage device
DE19927594C1 (en) * 1999-06-17 2001-02-08 Hydac Technology Gmbh Hydraulic accumulators, especially hydraulic dampers
DE19930101A1 (en) 1999-07-01 2001-01-18 Fluidtech Gmbh Switching device for a work machine
US6478052B1 (en) * 2001-07-25 2002-11-12 Jeff Alan Conley Pulsation damping assembly and method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0240871A2 *

Also Published As

Publication number Publication date
US20040028542A1 (en) 2004-02-12
ATE301777T1 (en) 2005-08-15
US20020056275A1 (en) 2002-05-16
EP1334280B1 (en) 2005-08-10
ES2246352T3 (en) 2006-02-16
DE10057746A1 (en) 2002-06-06
WO2002040871A2 (en) 2002-05-23
DE50107069D1 (en) 2005-09-15
WO2002040871A3 (en) 2002-08-01
JP2004514096A (en) 2004-05-13
US6866066B2 (en) 2005-03-15

Similar Documents

Publication Publication Date Title
EP1334280A2 (en) Hydraulic accumulator
DE3323363C2 (en)
WO2017182198A1 (en) Adjustable vibration damper
EP1180599A1 (en) Safeguarding device for a pump, which can be used in a fluid transmission
EP0893635A1 (en) Solenoid valve device
DE3708248A1 (en) 2-WAY VALVE
EP2084451A2 (en) Lubricant distributor
EP0054602B1 (en) Own fluid controlled stop valve
DE19646611C1 (en) Electro-hydraulic control valve
EP0817918B1 (en) Hydraulically operable distributing valve
EP1654464B1 (en) Device for damping water hammer
WO1998005870A1 (en) Hydraulic control device
DE19616973A1 (en) Multi-way slide-valve for vehicles
EP1629207B1 (en) Hydraulic control arrangement
DE4234037C2 (en) Valve arrangement, in particular for mobile work equipment
DE10330516B3 (en) Hydraulic accumulator, especially a piston-type accumulator, used in a spring system in vehicles comprises an accumulator housing having a free end terminated by a valve block provided with a ball valve
DE4326447A1 (en) Hydraulic valve for a stabiliser control on a motor vehicle
DE3034859A1 (en) HYDRAULIC DIRECTIONAL VALVE
EP1354139B1 (en) Hydraulic accumulator, especially bladder accumulator
DE102004039353A1 (en) line distributor
EP1629208A1 (en) Proportional pressure control valve
DD228007A5 (en) LIQUID TRANSPORT DEVICE PREFERABLY FOR COLORING MATERIALS AND CHEMICALS
EP1309801B1 (en) Valve
DE3534387A1 (en) Pilot operated 3/2-way valve
DE3836300C2 (en) magnetic valve

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20030219

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050810

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050810

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050810

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050810

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20050810

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REF Corresponds to:

Ref document number: 50107069

Country of ref document: DE

Date of ref document: 20050915

Kind code of ref document: P

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051107

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051110

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051110

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051130

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051130

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051130

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051130

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060110

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2246352

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

26N No opposition filed

Effective date: 20060511

BERE Be: lapsed

Owner name: HYDAC TECHNOLOGY G.M.B.H.

Effective date: 20051130

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20131108

Year of fee payment: 13

Ref country code: SE

Payment date: 20131122

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20131105

Year of fee payment: 13

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 301777

Country of ref document: AT

Kind code of ref document: T

Effective date: 20141107

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141108

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141107

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20151229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141108

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20180918

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20190919

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20191130

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20191118

Year of fee payment: 19

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20191107

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191107

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50107069

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201107

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210601