EP2703651A2 - Pressure accumulator assembly and device with such a pressure accumulator assembly - Google Patents

Pressure accumulator assembly and device with such a pressure accumulator assembly Download PDF

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Publication number
EP2703651A2
EP2703651A2 EP13004059.5A EP13004059A EP2703651A2 EP 2703651 A2 EP2703651 A2 EP 2703651A2 EP 13004059 A EP13004059 A EP 13004059A EP 2703651 A2 EP2703651 A2 EP 2703651A2
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EP
European Patent Office
Prior art keywords
pressure
pressure accumulator
accumulator
arrangement according
gas
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Granted
Application number
EP13004059.5A
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German (de)
French (fr)
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EP2703651A3 (en
EP2703651B1 (en
Inventor
Norbert Weber
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Hydac Technology GmbH
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Hydac Technology GmbH
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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
    • 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
    • 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
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3151—Accumulator separating means having flexible separating means the flexible separating means being diaphragms or membranes
    • 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
    • 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
    • F15B2201/50—Monitoring, detection and testing means for accumulators
    • F15B2201/51—Pressure detection

Definitions

  • the invention relates to a pressure accumulator arrangement and a device with such a pressure accumulator arrangement.
  • Equation (2) is also referred to as the law of Amontons.
  • Another problem is the diffusion of gas from the gas side to the fluid side of the hydro-pneumatic diaphragm accumulator. Although it is known to make a refill in downtime, but this is not provided during operation.
  • the invention is therefore based on the object to show a pressure storage arrangement that is more flexible and an extended service life having. Furthermore, it is an object of the invention to show a device with such a pressure storage arrangement.
  • the pressure accumulator arrangement has a hydropneumatic pressure accumulator and a further hydropneumatic pressure accumulator.
  • the one accumulator is on its fluid side with a hydraulic consumer and the other pressure accumulator is connected on its fluid side with a supply source.
  • the two pressure accumulators can be coupled to one another gas-conducting on their gas sides by means of a regulating device.
  • the further pressure accumulator remains, a target pressure specification for the hydraulic consumer compliant, connected at a predeterminable value exceeding Solldruckabweichung by means of a regulating device to the one pressure accumulator gas-conducting at least until the target pressure deviation falls below the predetermined value.
  • the pressure accumulator assembly it is for the first time advantageously possible to adjust the gas filling of a hydropneumatic accumulator during operation. In this way, the capacity can be changed depending on the situation, ie increased or decreased. By draining gas on the gas side, the capacity can be reduced. If the pressure accumulator has heated up as a result of many charge and discharge cycles, it may be that the permissible operating pressure is reached or exceeded. By discharging the gas from the gas side, it is then advantageously possible to reduce the operating pressure. If the accumulator has cooled down again, it can be refilled of gas on the gas side, the pressure in the accumulator can be increased again. Consequently, then again more pressure can be cached in the accumulator.
  • the hydraulic system can continue to operate and must not be shut down due to exceeding the capacity of the pressure accumulator. It is also possible, within the scope of the pressure accumulator arrangement according to the invention, to use pressure accumulators with a smaller nominal volume than hitherto.
  • the target pressure specification can be predetermined in the form of a pressure value or a pressure range. Then the accumulator assembly to the respective hydraulic system in which it is installed, even more flexible customizable. Thus, the pressure in the accumulator can be kept at a certain value or in a certain range of values, which enables optimum operation of the hydraulic consumer.
  • the desired pressure specification can be predetermined in a time-dependent manner. Consequently, the adaptation of the pressure accumulator arrangement can be made to changing requirements during operation.
  • the permissible operating pressure of one pressure accumulator is expediently below the permissible operating pressure of the further pressure accumulator.
  • the nominal volume of one accumulator can be less than the nominal volume of the further accumulator.
  • the one pressure accumulator is advantageously a diaphragm accumulator while the other pressure accumulator is expediently a piston accumulator.
  • the accumulator assembly is optimally adaptable to its intended use at a low cost.
  • lower energy losses occur in membrane accumulators due to the low intrinsic weight of the membrane during rapid charge and discharge cycles.
  • faster cycles can be driven become.
  • the piston accumulator has a higher permissible pressure ratio with the same volume, making it ideal for filling a diaphragm accumulator with gas or relieving it of gas.
  • At least one sensor in particular a pressure sensor or a temperature sensor, connected to the one pressure accumulator or to the further pressure accumulator or to the connecting line between the pressure accumulators.
  • the sensors allow the operational monitoring of the pressure accumulators and allow the capacity to be adapted to the respective operating state even more quickly and in line with demand.
  • the additional pressure accumulator can be connected alternately to the supply source or a tank at its fluid side via a valve. This makes it possible to additionally bias or relieve the further accumulator depending on how the specific operating situation requires it. In this way, the capacity of the further pressure accumulator and thus the accumulator assembly can be adjusted overall in a wider context.
  • connection for filling the gas filling of a pressure accumulator may be provided.
  • This connection can be refilled especially during downtime.
  • the filling may be required in particular due to the diffusion of gas through the membrane of the membrane memory.
  • the second part of the object is achieved by a device according to claim 11, the device has an accumulator assembly, wherein the one pressure accumulator is coupled to a piston-cylinder unit as a hydraulic consumer.
  • a device can be used in particular as a cable tensioner in cranes or lifts.
  • It can be a sensor, in particular a temperature, pressure or position sensor, provided on the piston-cylinder unit.
  • the sensor may then be coupled to the regulating device. This allows a particularly accurate and timely adjustment of the capacity of the accumulator assembly during operation. Due to the distance between the piston-cylinder unit and the accumulator assembly can thus be reacted earlier and more appropriate to the needs and there may be a more targeted adaptation to the particular requirements in the piston-cylinder unit.
  • the piston-cylinder unit may be connectable to the supply source, preferably via a valve, which is preferably formed as a 3/2-way valve or flow divider valve. This embodiment enables positioning of the piston in the piston-cylinder unit. Positioning can also be done during operation.
  • a pressure accumulator assembly 1 with a hydropneumatic pressure accumulator 3 and a further hydropneumatic pressure accumulator 5 is shown.
  • the one pressure accumulator 3 is connected to form the device 7 on its fluid side 9 with a hydraulic consumer 11 in the form of a piston-cylinder unit 13, see.
  • the further pressure accumulator 5 is connected to a supply source 15, in particular with a hydraulic pump, connected on its fluid side 17.
  • the two accumulators 3, 5 are gas-conductively coupled to each other on their gas sides 19, 21 via a connecting line 23 by means of a regulating device 25.
  • the regulating device 25 in this case comprises a switched into the connecting line 23 valve 27 as a blocking member 29.
  • the further pressure accumulator 5 remains, a target pressure specification for the hydraulic consumer 11 compliant, at a predetermined value exceeding Solltikabweichung means of the regulating device 25 to the other pressure accumulator 5 at least as long gas-conducting connected until the setpoint pressure deviation falls below the predefinable value.
  • the blocking member 29 is opened when the pressure in a pressure accumulator 3 is higher than the target pressure plus the tolerable Solltikabweichung and the pressure in the other pressure accumulator 5 is less than in a pressure accumulator 3. In this way, the one pressure accumulator 3 by discharging gas relieved.
  • the locking member 29 can be opened when the pressure in a pressure accumulator 3 is less than the target pressure minus the tolerable Solldruckabweichung and the pressure in the other accumulator 5 is greater than in a pressure accumulator 3. Then the accumulator 3 is filled with gas.
  • the target pressure specification may consist of a specific pressure value or a pressure range.
  • the actuation of the blocking member 29 of the regulating device 25 can also be timed via a control unit 31.
  • the one pressure accumulator 3 is designed as a diaphragm accumulator while the other pressure accumulator 5 is a piston accumulator.
  • the piston accumulator 5 in this case has an equal or higher nominal volume and an equal or higher permissible operating overpressure with respect to the diaphragm accumulator 3.
  • a pressure sensor 32 For monitoring of a pressure accumulator 3 is a pressure sensor 32 to the connecting line 23 between the gas side 19 of a pressure accumulator 3 and the locking member 29 of the regulating device 25 connected.
  • a connection 35 for filling the gas side 19 of a pressure accumulator 3 is provided in this section 33 of the connecting line 23.
  • the one valve 37 couples a supply line 41 at one end 43 either to the further pressure accumulator 5 or the hydraulic consumer 11.
  • This valve 37 allows fluid either the fluid side 17 of the further pressure accumulator 5 or a piston side 45 of the piston-cylinder unit thirteenth be forwarded.
  • the second valve 39 couples the other end 47 of the supply line 41 either with the supply source 15 in the form of a pump 49 or with a tank 51.
  • hydraulic fluid can be conveyed not only to the further pressure accumulator 5 and the hydraulic consumer 11, but also in the reverse direction drain to the tank 51.
  • the control unit 31 is coupled to the valves 27, 37, 39 and the sensors 32, 55, 57, 59, 61, 63 of the device.
  • Fig. 2 the accumulator assembly 1 is shown in a perspective view.
  • One pressure accumulator 3 is connected in the form of a diaphragm accumulator to a valve housing block 69.
  • a piston accumulator is arranged as a further pressure accumulator 5.
  • the valve housing block 69 is cuboid and solid designed to withstand even very high pressures.
  • the connecting line between the two pressure accumulators 3, 5 and the intermediate valve 27 of the regulating device 25 is arranged.
  • the valve housing block 69 has a connection 35 for filling the gas side of the one pressure accumulator 3.
  • the accumulator assembly 1 is designed to save space.
  • a way is shown by the accumulator assembly 1 and the device 7 with the accumulator assembly 1, on which the capacity of a pressure accumulator 3 by changing the amount of material on the gas side 19 of a pressure accumulator 3 during operation is customizable.
  • the range of application of the accumulator assembly 1 is thus increased or it is the installation of a smaller pressure accumulator 3 allows.

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  • 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)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The assembly (1) has two pressure storage units (3, 5) connectable with a hydraulic load (11) i.e. piston cylinder unit (13), and with a supply source (15) i.e. pump (49), at respective fluid sides (9, 17). The storage units are gas-conductively linked with one another at gas sides (19, 21) by a regulation device (25). One of the storage units exhibits a target pressure parameter for the load at a target pressure deviation that exceeds a predetermined value by the regulating device, where the other storage unit remains gas-conductively connected until the deviation falls below the value. The pressure storage units are formed as a diaphragm storage unit and a piston storage unit respectively. An independent claim is also included for a rope tensioning device.

Description

Die Erfindung betrifft eine Druckspeicheranordnung und eine Vorrichtung mit einer solchen Druckspeicheranordnung.The invention relates to a pressure accumulator arrangement and a device with such a pressure accumulator arrangement.

Druckspeicher, insbesondere hydropneumatische Druckspeicher, sind im Stand der Technik in vielfältigen Ausführungsformen bekannt, z. B. als Membranspeicher oder Kolbenspeicher oder in anderen Bauarten. Wenn diese Druckspeicher in hydraulische Anlagen eingebaut werden sollen, ist eine Auslegung vorzunehmen. Diese erfolgt anhand des Nennvolumens, der Arbeitsdrücke, der Vorspannung und der Arbeitstemperatur sowie unter Berücksichtigung der thermischen Zustandsgleichung (1) für ideale Gase p * V = n * R m * T ,

Figure imgb0001

wobei

p
[Pa] der Druck;
V
[m3] das Volumen;
n
die Stoffmenge;
Rm
die universelle oder molare Gaskonstante; und
T
[K] die Temperatur
sind.Pressure accumulator, in particular hydropneumatic pressure accumulator, are known in the prior art in various embodiments, for. B. as a diaphragm accumulator or piston accumulator or other types. If these pressure accumulators are to be installed in hydraulic systems, a design must be carried out. This is done on the basis of the nominal volume, the working pressures, the bias voltage and the working temperature and taking into account the thermal equation of state (1) for ideal gases p * V = n * R m * T .
Figure imgb0001
in which
p
[Pa] the pressure;
V
[m 3 ] the volume;
n
the amount of substance;
R m
the universal or molar gas constant; and
T
[K] the temperature
are.

Diese Formel kann unter den Annahmen einer konstanten Stoffmenge und eines konstanten Volumens vereinfacht werden zu: p / T = const .

Figure imgb0002
This formula can be simplified under the assumptions of a constant amount of substance and a constant volume: p / T = const ,
Figure imgb0002

Die Gleichung (2) wird auch als das Gesetz von Amontons bezeichnet.Equation (2) is also referred to as the law of Amontons.

Durch schnelle Lade- und Entladevorgänge kann es zu einer erheblichen Erwärmung des Arbeitsfluides kommen. Dies führt aufgrund der Gleichung (2) zu einer Druckerhöhung und zu einem erhöhten Verschleiß der Membran bei Membranspeichern und somit zu einer verkürzten Standzeit.Fast charging and discharging can lead to considerable heating of the working fluid. Due to the equation (2), this leads to an increase in pressure and to an increased wear of the membrane in the case of membrane accumulators and thus to a shortened service life.

Ein weiteres Problem ist die Diffusion von Gas von der Gasseite zur Fluidseite des hydropneumatischen Membranspeichers. Es ist zwar bekannt, in Stillstandzeiten eine Nachfüllung vornehmen zu können, dies ist jedoch im laufenden Betrieb nicht vorgesehen.Another problem is the diffusion of gas from the gas side to the fluid side of the hydro-pneumatic diaphragm accumulator. Although it is known to make a refill in downtime, but this is not provided during operation.

In der Vergangenheit wurden verschiedene Vorschläge gemacht, um Druckspeicher an die jeweiligen Anforderungen im Betrieb anzupassen. Diese umfassen, die Auswahl eines Druckspeichers mit einem geeigneten Nennvolumen und einer hinreichenden Vorspannung, der Kühlung des Druckspeichers im laufenden Betrieb und dem Vorsehen von Druckbegrenzungsventilen, um schädliche Überdrücke im Druckspeicher zu vermeiden.In the past, various proposals have been made to adapt pressure accumulators to the respective requirements in operation. These include selecting a pressure accumulator of suitable nominal volume and sufficient preload, cooling the accumulator during operation, and providing pressure relief valves to avoid damaging overpressures in the pressure accumulator.

Weiterhin besteht eine Forderung der Praxis dahingehend, die Kapazität eines Druckspeichers und seine Speichercharakteristik, die sich in Form einer Hysterese ausdrücken lässt, im laufenden Betrieb an veränderte Bedingungen anpassbar zu machen.Furthermore, there is a requirement in practice to make the capacity of a pressure accumulator and its memory characteristic, which can be expressed in the form of a hysteresis, adaptable to changed conditions during operation.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Druckspeicheranordnung aufzuzeigen, die flexibler einsetzbar ist und eine verlängerte Standzeit aufweist. Des Weiteren besteht eine Aufgabe der Erfindung darin, eine Vorrichtung mit einer solchen Druckspeicheranordnung aufzuzeigen.The invention is therefore based on the object to show a pressure storage arrangement that is more flexible and an extended service life having. Furthermore, it is an object of the invention to show a device with such a pressure storage arrangement.

Der erste Teil der Aufgabe wird durch eine Druckspeicheranordnung mit den Merkmalen von Patentanspruch 1 gelöst. Eine Vorrichtung mit einer solchen Druckspeicheranordnung wird durch Anspruch 11 aufgezeigt. Vorteilhafte Ausführungsformen und Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.The first part of the object is achieved by a pressure accumulator arrangement having the features of patent claim 1. An apparatus with such a pressure storage arrangement is shown by claim 11. Advantageous embodiments and further developments of the invention are the subject of the dependent claims.

Die erfindungsgemäße Druckspeicheranordnung weist einen hydropneumatischen Druckspeicher und einen weiteren hydropneumatischen Druckspeicher auf. Der eine Druckspeicher ist auf seiner Fluidseite mit einem hydraulischen Verbraucher und der weitere Druckspeicher ist auf seiner Fluidseite mit einer Versorgungsquelle verbindbar. Die beiden Druckspeicher sind auf ihren Gasseiten mittels einer Regulierungseinrichtung miteinander gasleitend koppelbar. Der weitere Druckspeicher bleibt, eine Solldruckvorgabe für den hydraulischen Verbraucher einhaltend, bei einer einen vorgebbaren Wert überschreitenden Solldruckabweichung mittels einer Regulierungseinrichtung an den einen Druckspeicher zumindest solange gasleitend angeschlossen, bis die Solldruckabweichung den vorgebbaren Wert unterschreitet.The pressure accumulator arrangement according to the invention has a hydropneumatic pressure accumulator and a further hydropneumatic pressure accumulator. The one accumulator is on its fluid side with a hydraulic consumer and the other pressure accumulator is connected on its fluid side with a supply source. The two pressure accumulators can be coupled to one another gas-conducting on their gas sides by means of a regulating device. The further pressure accumulator remains, a target pressure specification for the hydraulic consumer compliant, connected at a predeterminable value exceeding Solldruckabweichung by means of a regulating device to the one pressure accumulator gas-conducting at least until the target pressure deviation falls below the predetermined value.

Durch die erfindungsgemäße Druckspeicheranordnung ist es erstmals vorteilhaft möglich, die Gasfüllung eines hydropneumatischen Druckspeichers im laufenden Betrieb anzupassen. Auf diese Weise kann die Kapazität situationsabhängig verändert, d.h. erhöht oder verringert, werden. Durch das Ablassen von Gas auf der Gasseite kann die Kapazität reduziert werden. Wenn sich der Druckspeicher in Folge vieler Lade- und Entladezyklen stark erwärmt hat, kann es sein, dass der zulässige Betriebsüberdruck erreicht oder überschritten wird. Durch das Ablassen des Gases von der Gasseite ist es dann vorteilhaft möglich, den Betriebsüberdruck zu reduzieren. Wenn sich der Druckspeicher wieder abgekühlt hat, kann durch das Nachfüllen von Gas auf der Gasseite der Druck im Druckspeicher wieder erhöht werden. Mithin kann dann wieder mehr Druck im Druckspeicher zwischengespeichert werden. Somit kann die hydraulische Anlage weiter betrieben werden und muss nicht wegen Überschreitung der Kapazität des Druckspeichers abgeschaltet werden. Es ist auch möglich, im Rahmen der erfindungsgemäßen Druckspeicheranordnung Druckspeicher mit einem kleineren Nennvolumen als bisher einzusetzen.By the pressure accumulator assembly according to the invention, it is for the first time advantageously possible to adjust the gas filling of a hydropneumatic accumulator during operation. In this way, the capacity can be changed depending on the situation, ie increased or decreased. By draining gas on the gas side, the capacity can be reduced. If the pressure accumulator has heated up as a result of many charge and discharge cycles, it may be that the permissible operating pressure is reached or exceeded. By discharging the gas from the gas side, it is then advantageously possible to reduce the operating pressure. If the accumulator has cooled down again, it can be refilled of gas on the gas side, the pressure in the accumulator can be increased again. Consequently, then again more pressure can be cached in the accumulator. Thus, the hydraulic system can continue to operate and must not be shut down due to exceeding the capacity of the pressure accumulator. It is also possible, within the scope of the pressure accumulator arrangement according to the invention, to use pressure accumulators with a smaller nominal volume than hitherto.

Vorteilhaft ist die Solldruckvorgabe in Form eines Druckwerts oder eines Druckbereichs vorgebbar. Sodann ist die Druckspeicheranordnung an die jeweilige hydraulische Anlage, in die sie eingebaut wird, noch flexibler anpassbar. Mithin kann der Druck im Druckspeicher auf einem bestimmten Wert oder in einem bestimmten Wertebereich gehalten werden, der einen optimalen Betrieb des hydraulischen Verbrauchers ermöglicht.Advantageously, the target pressure specification can be predetermined in the form of a pressure value or a pressure range. Then the accumulator assembly to the respective hydraulic system in which it is installed, even more flexible customizable. Thus, the pressure in the accumulator can be kept at a certain value or in a certain range of values, which enables optimum operation of the hydraulic consumer.

Die Solldruckvorgabe kann darüber hinaus zeitabhängig vorgebbar sein. Mithin kann die Anpassung der Druckspeicheranordnung an sich veränderte Anforderungen im laufenden Betrieb erfolgen.In addition, the desired pressure specification can be predetermined in a time-dependent manner. Consequently, the adaptation of the pressure accumulator arrangement can be made to changing requirements during operation.

Der zulässige Betriebsüberdruck des einen Druckspeichers liegt zweckmäßigerweise unter dem zulässigen Betriebsüberdruck des weiteren Druckspeichers. Weiterhin kann das Nennvolumen des einen Druckspeichers unter dem Nennvolumen des weiteren Druckspeichers liegen. Diese Merkmale stellen vorteilhaft sicher, dass eine Kapazitätserweiterung in jedem Betriebszustand des einen Druckspeichers erfolgen kann.The permissible operating pressure of one pressure accumulator is expediently below the permissible operating pressure of the further pressure accumulator. Furthermore, the nominal volume of one accumulator can be less than the nominal volume of the further accumulator. These features advantageously ensure that an increase in capacity can take place in any operating state of the one pressure accumulator.

Der eine Druckspeicher ist vorteilhafterweise ein Membranspeicher während der weitere Druckspeicher zweckmäßigerweise ein Kolbenspeicher ist. Somit ist die Druckspeicheranordnung an ihren Einsatzzweck bei niedrigen Kosten optimal anpassbar. So fallen bei Membranspeichern aufgrund des geringen Eigengewichts der Membran bei schnellen Lade- und Entladezyklen geringere Energieverluste an. Zudem können schnellere Zyklen gefahren werden. Dem gegenüber weist der Kolbenspeicher ein höheres zulässiges Druckverhältnis bei gleichem Volumen auf und eignet sich damit ideal dafür, einen Membranspeicher mit Gas zu befüllen oder ihn von Gas zu entlasten.The one pressure accumulator is advantageously a diaphragm accumulator while the other pressure accumulator is expediently a piston accumulator. Thus, the accumulator assembly is optimally adaptable to its intended use at a low cost. As a result, lower energy losses occur in membrane accumulators due to the low intrinsic weight of the membrane during rapid charge and discharge cycles. In addition, faster cycles can be driven become. On the other hand, the piston accumulator has a higher permissible pressure ratio with the same volume, making it ideal for filling a diaphragm accumulator with gas or relieving it of gas.

Besonders vorteilhaft ist zumindest ein Sensor, insbesondere ein Drucksensor oder ein Temperatursensor, an den einen Druckspeicher oder an den weiteren Druckspeicher oder an die Verbindungsleitung zwischen den Druckspeichern angeschlossen. Die Sensoren ermöglichen die Betriebsüberwachung der Druckspeicher und erlauben es, die Kapazität noch bedarfsgerechter und schneller an den jeweiligen Betriebszustand anzupassen.Particularly advantageous is at least one sensor, in particular a pressure sensor or a temperature sensor, connected to the one pressure accumulator or to the further pressure accumulator or to the connecting line between the pressure accumulators. The sensors allow the operational monitoring of the pressure accumulators and allow the capacity to be adapted to the respective operating state even more quickly and in line with demand.

In einer weiteren, bevorzugten Ausführungsform ist der weitere Druckspeicher an seiner Fluidseite über ein Ventil wechselweise an die Versorgungsquelle oder einen Tank anschließbar. Dies ermöglicht es, den weiteren Druckspeicher zusätzlich vorzuspannen oder zu entlasten je nachdem, wie es die konkrete Betriebssituation erfordert. Auf diese Weise kann auch die Kapazität des weiteren Druckspeichers und mithin der Druckspeicheranordnung insgesamt in einem weiteren Rahmen angepasst werden.In a further, preferred embodiment, the additional pressure accumulator can be connected alternately to the supply source or a tank at its fluid side via a valve. This makes it possible to additionally bias or relieve the further accumulator depending on how the specific operating situation requires it. In this way, the capacity of the further pressure accumulator and thus the accumulator assembly can be adjusted overall in a wider context.

Weiterhin kann ein Anschluss zur Auffüllung der Gasfüllung des einen Druckspeichers vorgesehen sein. Über diesen Anschluss kann eine Nachfüllung insbesondere während Stillstandszeiten erfolgen. Die Auffüllung kann insbesondere aufgrund der Diffusion von Gas durch die Membran des Membranspeichers erforderlich sein.Furthermore, a connection for filling the gas filling of a pressure accumulator may be provided. This connection can be refilled especially during downtime. The filling may be required in particular due to the diffusion of gas through the membrane of the membrane memory.

Der zweite Teil der Aufgabe wird durch eine Vorrichtung gemäß Anspruch 11 gelöst, die Vorrichtung weist eine Druckspeicheranordnung auf, wobei der eine Druckspeicher mit einer Kolben-Zylinder-Einheit als hydraulischem Verbraucher gekoppelt ist. Eine solche Vorrichtung lässt sich insbesondere als Seilspanner in Krananlagen oder Liftanlagen einsetzen.The second part of the object is achieved by a device according to claim 11, the device has an accumulator assembly, wherein the one pressure accumulator is coupled to a piston-cylinder unit as a hydraulic consumer. Such a device can be used in particular as a cable tensioner in cranes or lifts.

Es kann ein Sensor, insbesondere ein Temperatur-, Druck- oder Positionssensor, an der Kolben-Zylinder-Einheit vorgesehen sein. Der Sensor kann dann mit der Regulierungseinrichtung gekoppelt sein. Dies ermöglicht eine besonders genaue und zeitnahe Anpassung der Kapazität der Druckspeicheranordnung während des laufenden Betriebs. Aufgrund der Distanz zwischen der Kolben-Zylinder-Einheit und der Druckspeicheranordnung kann mithin früher und bedarfsgerechter reagiert werden und es kann eine gezieltere Anpassung an die jeweiligen Anforderungen in der Kolben-Zylinder-Einheit erfolgen.It can be a sensor, in particular a temperature, pressure or position sensor, provided on the piston-cylinder unit. The sensor may then be coupled to the regulating device. This allows a particularly accurate and timely adjustment of the capacity of the accumulator assembly during operation. Due to the distance between the piston-cylinder unit and the accumulator assembly can thus be reacted earlier and more appropriate to the needs and there may be a more targeted adaptation to the particular requirements in the piston-cylinder unit.

Die Kolben-Zylinder-Einheit kann an die Versorgungsquelle anschließbar sein, vorzugsweise über ein Ventil, das bei der bevorzugt als 3/2-Wege-Ventil oder Mengenteilerventil ausgebildet ist. Durch diese Ausführungsform wird eine Positionierung des Kolbens in der Kolben-Zylinder-Einheit ermöglicht. Die Positionierung kann auch während des laufenden Betriebs erfolgen.The piston-cylinder unit may be connectable to the supply source, preferably via a valve, which is preferably formed as a 3/2-way valve or flow divider valve. This embodiment enables positioning of the piston in the piston-cylinder unit. Positioning can also be done during operation.

Die Erfindung ist nachfolgend anhand von in den Figuren dargestellten Ausführungsbeispielen näher erläutert. Es zeigen:

Fig. 1
einen Hydraulikplan der erfindungsgemäßen Druckspeicheranordnung bzw. der Vorrichtung mit einer solchen Druckspeicheranordnung; und
Fig. 2
eine perspektivische Ansicht der Druckspeicheranordnung.
The invention is explained in more detail with reference to exemplary embodiments illustrated in the figures. Show it:
Fig. 1
a hydraulic plan of the pressure accumulator assembly according to the invention or the device with such a pressure accumulator assembly; and
Fig. 2
a perspective view of the accumulator assembly.

In den Fig. 1 und 2 ist eine Druckspeicheranordnung 1 mit einem hydropneumatischen Druckspeicher 3 und einem weiteren hydropneumatischen Druckspeicher 5 gezeigt. Der eine Druckspeicher 3 ist zur Bildung der Vorrichtung 7 auf seiner Fluidseite 9 mit einem hydraulischen Verbraucher 11 in Form einer Kolben-Zylinder-Einheit 13 verbunden, vgl. Fig. 1. Der weitere Druckspeicher 5 ist mit einer Versorgungsquelle 15, insbesondere mit einer Hydropumpe, auf seiner Fluidseite 17 verbunden. Die beiden Druckspeicher 3, 5 sind auf ihren Gasseiten 19, 21 über eine Verbindungsleitung 23 mittels einer Regulierungseinrichtung 25 miteinander gasleitend koppelbar. Die Regulierungseinrichtung 25 umfasst dabei ein in die Verbindungsleitung 23 geschaltetes Ventil 27 als Sperrorgan 29. Der weitere Druckspeicher 5 bleibt, eine Solldruckvorgabe für den hydraulischen Verbraucher 11 einhaltend, bei einer einen vorgebbaren Wert überschreitenden Solldruckabweichung mittels der Regulierungseinrichtung 25 an den weiteren Druckspeicher 5 zumindest solange gasleitend angeschlossen, bis die Solldruckabweichung den vorgebbaren Wert unterschreitet. Mithin wird das Sperrorgan 29 geöffnet, wenn der Druck im einen Druckspeicher 3 höher ist als die Solldruckvorgabe zuzüglich der tolerierbaren Solldruckabweichung und der Druck im weiteren Druckspeicher 5 geringer ist als im einen Druckspeicher 3. Auf diese Weise wird der eine Druckspeicher 3 durch Ablassen von Gas entlastet. Umgekehrt kann das Sperrorgan 29 geöffnet werden, wenn der Druck im einen Druckspeicher 3 geringer ist als die Solldruckvorgabe abzüglich der tolerierbaren Solldruckabweichung und der Druck im weiteren Druckspeicher 5 größer ist als im einen Druckspeicher 3. Dann wird der eine Druckspeicher 3 mit Gas aufgefüllt. Vorteilhaft kann die Solldruckvorgabe aus einem bestimmten Druckwert oder einem Druckbereich bestehen. Die Betätigung des Sperrorgans 29 der Regulierungseinrichtung 25 kann darüber hinaus über eine Steuereinheit 31 zeitlich gesteuert werden.In the Fig. 1 and 2 a pressure accumulator assembly 1 with a hydropneumatic pressure accumulator 3 and a further hydropneumatic pressure accumulator 5 is shown. The one pressure accumulator 3 is connected to form the device 7 on its fluid side 9 with a hydraulic consumer 11 in the form of a piston-cylinder unit 13, see. Fig. 1 , The further pressure accumulator 5 is connected to a supply source 15, in particular with a hydraulic pump, connected on its fluid side 17. The two accumulators 3, 5 are gas-conductively coupled to each other on their gas sides 19, 21 via a connecting line 23 by means of a regulating device 25. The regulating device 25 in this case comprises a switched into the connecting line 23 valve 27 as a blocking member 29. The further pressure accumulator 5 remains, a target pressure specification for the hydraulic consumer 11 compliant, at a predetermined value exceeding Solldruckabweichung means of the regulating device 25 to the other pressure accumulator 5 at least as long gas-conducting connected until the setpoint pressure deviation falls below the predefinable value. Thus, the blocking member 29 is opened when the pressure in a pressure accumulator 3 is higher than the target pressure plus the tolerable Solldruckabweichung and the pressure in the other pressure accumulator 5 is less than in a pressure accumulator 3. In this way, the one pressure accumulator 3 by discharging gas relieved. Conversely, the locking member 29 can be opened when the pressure in a pressure accumulator 3 is less than the target pressure minus the tolerable Solldruckabweichung and the pressure in the other accumulator 5 is greater than in a pressure accumulator 3. Then the accumulator 3 is filled with gas. Advantageously, the target pressure specification may consist of a specific pressure value or a pressure range. The actuation of the blocking member 29 of the regulating device 25 can also be timed via a control unit 31.

Der eine Druckspeicher 3 ist als Membranspeicher ausgeführt während der weitere Druckspeicher 5 ein Kolbenspeicher ist. Der Kolbenspeicher 5 weist hierbei ein gleiches oder höheres Nennvolumen und einen gleichen oder höheren zulässigen Betriebsüberdruck gegenüber dem Membranspeicher 3 auf. Zur Überwachung des einen Druckspeichers 3 ist ein Drucksensor 32 an die Verbindungsleitung 23 zwischen der Gasseite 19 des einen Druckspeichers 3 und das Sperrorgan 29 der Regulierungseinrichtung 25 angeschlossen. Weiterhin ist in diesem Abschnitt 33 der Verbindungsleitung 23 ein Anschluss 35 zur Auffüllung der Gasseite 19 des einen Druckspeichers 3 vorgesehen. Der Anschluss der Fluidseite 17 des weiteren Druckspeichers 5 an die Versorgungsquelle 15 erfolgt über zwei Schaltventile 37, 39, die als elektromagnetisch betätigbare Wegeventile ausgeführt sind. Das eine Ventil 37 koppelt eine Versorgungsleitung 41 an einem Ende 43 entweder mit dem weiteren Druckspeicher 5 oder dem hydraulischen Verbraucher 11. Dieses Ventil 37 ermöglicht es, Fluid entweder der Fluidseite 17 des weiteren Druckspeichers 5 oder einer Kolbenseite 45 der Kolben-Zylinder-Einheit 13 zuzuleiten. Das zweite Ventil 39 koppelt das andere Ende 47 der Versorgungsleitung 41 entweder mit der Versorgungsquelle 15 in Form einer Pumpe 49 oder mit einem Tank 51. Mithin kann Hydraulikflüssigkeit nicht nur zum weiteren Druckspeicher 5 und dem hydraulischen Verbraucher 11 gefördert werden, sondern auch in umgekehrter Richtung zum Tank 51 abfließen.The one pressure accumulator 3 is designed as a diaphragm accumulator while the other pressure accumulator 5 is a piston accumulator. The piston accumulator 5 in this case has an equal or higher nominal volume and an equal or higher permissible operating overpressure with respect to the diaphragm accumulator 3. For monitoring of a pressure accumulator 3 is a pressure sensor 32 to the connecting line 23 between the gas side 19 of a pressure accumulator 3 and the locking member 29 of the regulating device 25 connected. Furthermore, a connection 35 for filling the gas side 19 of a pressure accumulator 3 is provided in this section 33 of the connecting line 23. The connection of the fluid side 17 of the further pressure accumulator 5 to the supply source 15 via two switching valves 37, 39, which are designed as electromagnetically operable directional control valves. The one valve 37 couples a supply line 41 at one end 43 either to the further pressure accumulator 5 or the hydraulic consumer 11. This valve 37 allows fluid either the fluid side 17 of the further pressure accumulator 5 or a piston side 45 of the piston-cylinder unit thirteenth be forwarded. The second valve 39 couples the other end 47 of the supply line 41 either with the supply source 15 in the form of a pump 49 or with a tank 51. Thus, hydraulic fluid can be conveyed not only to the further pressure accumulator 5 and the hydraulic consumer 11, but also in the reverse direction drain to the tank 51.

Am Kolbenspeicher 5 und am Zylinder 53 der Kolben-Zylinder-Einheit 13 sind weitere Drucksensoren 55, 57 vorgesehen. Darüber hinaus sind am Zylinder 53 und an den Druckspeichern 35 Temperatursensoren 59, 61, 63 angeordnet. Zur Überwachung der Position des Kolbens 65 ist an der Kolben-Zylinder-Einheit 13 ein Positionssensor 67 befestigt.At the piston accumulator 5 and the cylinder 53 of the piston-cylinder unit 13 further pressure sensors 55, 57 are provided. In addition, 35 temperature sensors 59, 61, 63 are arranged on the cylinder 53 and the pressure accumulators. For monitoring the position of the piston 65, a position sensor 67 is attached to the piston-cylinder unit 13.

Die Steuereinheit 31 ist mit den Ventilen 27, 37, 39 und den Sensoren 32, 55, 57, 59, 61, 63 der Vorrichtung gekoppelt.The control unit 31 is coupled to the valves 27, 37, 39 and the sensors 32, 55, 57, 59, 61, 63 of the device.

In Fig. 2 ist die Druckspeicheranordnung 1 in einer perspektivischen Darstellung gezeigt. Der eine Druckspeicher 3 ist in Form eines Membranspeichers an einen Ventilgehäuseblock 69 angeschlossen. Am gegenüberliegenden Ende des Ventilgehäuseblocks 69 ist ein Kolbenspeicher als weiterer Druckspeicher 5 angeordnet. Der Ventilgehäuseblock 69 ist quaderförmig und massiv ausgeführt, um auch sehr hohen Drücken standzuhalten. In dem Ventilgehäuseblock 69 sind die Verbindungsleitung zwischen den beiden Druckspeichern 3, 5 und das zwischengeschaltete Ventil 27 der Regulierungseinrichtung 25 angeordnet. Weiterhin weist der Ventilgehäuseblock 69 einen Anschluss 35 zur Auffüllung der Gasseite des einen Druckspeichers 3 auf. Darüber hinaus gibt es einen Anschluss 71 für einen Sensor zur Erfassung des Drucks in der Verbindungsleitung zwischen der Gasseite des einen Druckspeichers 3 und dem Ventil 27. Die Druckspeicheranordnung 1 ist sehr bauraumsparend ausgeführt.In Fig. 2 the accumulator assembly 1 is shown in a perspective view. One pressure accumulator 3 is connected in the form of a diaphragm accumulator to a valve housing block 69. At the opposite end of the valve housing block 69, a piston accumulator is arranged as a further pressure accumulator 5. The valve housing block 69 is cuboid and solid designed to withstand even very high pressures. In the valve housing block 69, the connecting line between the two pressure accumulators 3, 5 and the intermediate valve 27 of the regulating device 25 is arranged. Furthermore, the valve housing block 69 has a connection 35 for filling the gas side of the one pressure accumulator 3. In addition, there is a connection 71 for a sensor for detecting the pressure in the connecting line between the gas side of a pressure accumulator 3 and the valve 27. The accumulator assembly 1 is designed to save space.

Mithin wird durch die Druckspeicheranordnung 1 und die Vorrichtung 7 mit der Druckspeicheranordnung 1 ein Weg aufgezeigt, auf welchem die Kapazität eines Druckspeichers 3 durch Veränderung der Stoffmenge auf der Gasseite 19 des einen Druckspeichers 3 im laufenden Betrieb anpassbar ist. Der Einsatzbereich der Druckspeicheranordnung 1 wird somit vergrößert bzw. es wird der Verbau eines kleineren Druckspeichers 3 ermöglicht.Thus, a way is shown by the accumulator assembly 1 and the device 7 with the accumulator assembly 1, on which the capacity of a pressure accumulator 3 by changing the amount of material on the gas side 19 of a pressure accumulator 3 during operation is customizable. The range of application of the accumulator assembly 1 is thus increased or it is the installation of a smaller pressure accumulator 3 allows.

Claims (13)

Druckspeicheranordnung mit einem hydropneumatischen Druckspeicher (3) und einem weiteren hydropneumatischen Druckspeicher (5), wobei der eine Druckspeicher (3) mit einem hydraulischen Verbraucher (11) und der weitere Druckspeicher (5) mit einer Versorgungsquelle (15) auf den jeweiligen Fluidseiten (9, 17) verbindbar sind, wobei die beiden Druckspeicher (3, 5) auf ihren Gasseiten (19, 21) mittels einer Regulierungseinrichtung (25) miteinander gasleitend koppelbar sind, wobei der weitere Druckspeicher (5), eine Solldruckvorgabe für den hydraulischen Verbraucher (11) einhaltend, bei einer einen vorgebbaren Wert überschreitenden Solldruckabweichung mittels einer Regulierungseinrichtung (25) an den einen Druckspeicher (3) zumindest solange gasleitend angeschlossen bleibt, bis die Solldruckabweichung den vorgebbaren Wert unterschreitet.Pressure accumulator arrangement with a hydropneumatic pressure accumulator (3) and a further hydropneumatic accumulator (5), one accumulator (3) with a hydraulic consumer (11) and the further pressure accumulator (5) with a supply source (15) on the respective fluid sides (9 , 17) are connectable, wherein the two pressure accumulator (3, 5) on its gas sides (19, 21) by means of a regulating device (25) are gas-conductively coupled together, the further pressure accumulator (5), a target pressure specification for the hydraulic consumer (11 ) adhering, at a predetermined value exceeding the desired pressure deviation by means of a regulating device (25) to the one pressure accumulator (3) remains gas-conducting at least until the target pressure deviation falls below the predefinable value. Druckspeicheranordnung nach Anspruch 1, dadurch gekennzeichnet, dass die Solldruckvorgabe in Form eines Druckwerts oder eines Druckbereichs vorgebbar ist.Pressure accumulator arrangement according to claim 1, characterized in that the desired pressure preset in the form of a pressure value or a pressure range can be predetermined. Druckspeicheranordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Solldruckvorgabe zeitabhängig vorgebbar ist.Pressure accumulator arrangement according to one of the preceding claims, characterized in that the target pressure specification can be predetermined time-dependent. Druckspeicheranordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der zulässige Betriebsüberdruck des einen Druckspeichers (3) unter dem zulässigen Betriebsüberdruck des weiteren Druckspeichers (5) liegt.Pressure accumulator arrangement according to one of the preceding claims, characterized in that the permissible operating overpressure of the one pressure accumulator (3) is below the permissible operating overpressure of the further pressure accumulator (5). Druckspeicheranordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Nennvolumen des einen Druckspeichers (3) unter dem Nennvolumen des weiteren Druckspeichers (5) liegt.Pressure accumulator arrangement according to one of the preceding claims, characterized in that the nominal volume of the one Pressure accumulator (3) is below the nominal volume of the further pressure accumulator (5). Druckspeicheranordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der eine Druckspeicher (3) ein Membranspeicher ist.Pressure accumulator arrangement according to one of the preceding claims, characterized in that the one pressure accumulator (3) is a diaphragm accumulator. Druckspeicheranordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der weitere Druckspeicher (5) ein Kolbenspeicher ist.Pressure accumulator arrangement according to one of the preceding claims, characterized in that the further pressure accumulator (5) is a piston accumulator. Druckspeicheranordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zumindest ein Sensor (32, 55, 61, 63), insbesondere ein Drucksensor oder ein Temperatursensor, an den einen Druckspeicher (3) oder an den weiteren Druckspeicher (5) oder an die Verbindungsleitung (23) zwischen den Druckspeichern (3, 5) angeschlossen ist.Pressure accumulator arrangement according to one of the preceding claims, characterized in that at least one sensor (32, 55, 61, 63), in particular a pressure sensor or a temperature sensor, to the one pressure accumulator (3) or to the further pressure accumulator (5) or to the connecting line (23) between the pressure accumulators (3, 5) is connected. Druckspeicheranordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der weitere Druckspeicher (5) an seiner Fluidseite (17) über ein Ventil (39) wechselweise an die Versorgungsquelle (15) oder einen Tank (51) anschließbar ist.Pressure accumulator arrangement according to one of the preceding claims, characterized in that the further pressure accumulator (5) on its fluid side (17) via a valve (39) alternately to the supply source (15) or a tank (51) can be connected. Druckspeicheranordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Anschluss (35) zur Auffüllung der Gasfüllung des einen Druckspeichers (3) vorgesehen ist.Pressure accumulator arrangement according to one of the preceding claims, characterized in that a connection (35) for filling the gas filling of a pressure accumulator (3) is provided. Vorrichtung mit einer Druckspeicheranordnung gemäß einem der vorstehenden Ansprüche, wobei der eine Druckspeicher (3) mit einer Kolben-Zylinder-Einheit (13) als hydraulischem Verbraucher (11) gekoppelt ist.Device with a pressure storage arrangement according to one of the preceding claims, wherein the one pressure accumulator (3) is coupled to a piston-cylinder unit (13) as a hydraulic consumer (11). Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, dass zumindest ein Sensor (57, 59, 67), insbesondere ein Temperatur-, Druck- oder Positionssensor, an der Kolben-Zylinder-Einheit (13) vorgesehen ist und dass der Sensor (57, 59, 67) mit der Regulierungseinrichtung (25) gekoppelt ist.Apparatus according to claim 12, characterized in that at least one sensor (57, 59, 67), in particular a temperature, pressure or position sensor, on the piston-cylinder unit (13) is provided and that the sensor (57, 59 , 67) is coupled to the regulating device (25). Vorrichtung nach Anspruch 12 oder 13, dadurch gekennzeichnet, dass die Kolben-Zylinder-Einheit (13) an die Versorgungsquelle (15) anschließbar ist, vorzugsweise über ein Ventil (37), das weiter bevorzugt als 3/2-Wege-Ventil oder Mengenteilerventil ausgebildet ist.Apparatus according to claim 12 or 13, characterized in that the piston-cylinder unit (13) to the supply source (15) is connectable, preferably via a valve (37), the further preferred as a 3/2-way valve or flow divider valve is trained.
EP13004059.5A 2012-08-28 2013-08-14 Device with a pressure accumulator assembly Active EP2703651B1 (en)

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