EP2652764A1 - Storage module for a hydraulic stored-energy spring mechanism - Google Patents

Storage module for a hydraulic stored-energy spring mechanism

Info

Publication number
EP2652764A1
EP2652764A1 EP11782386.4A EP11782386A EP2652764A1 EP 2652764 A1 EP2652764 A1 EP 2652764A1 EP 11782386 A EP11782386 A EP 11782386A EP 2652764 A1 EP2652764 A1 EP 2652764A1
Authority
EP
European Patent Office
Prior art keywords
pressure
piston
storage
spring
module according
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
EP11782386.4A
Other languages
German (de)
French (fr)
Other versions
EP2652764B1 (en
Inventor
Matthias Schmidt
Thomas Brenneis
Jörg KNOSPE
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.)
ABB Technology AG
Original Assignee
ABB Technology AG
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Filing date
Publication date
Application filed by ABB Technology AG filed Critical ABB Technology AG
Publication of EP2652764A1 publication Critical patent/EP2652764A1/en
Application granted granted Critical
Publication of EP2652764B1 publication Critical patent/EP2652764B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/22Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/24Power arrangements internal to the switch for operating the driving mechanism using pneumatic or hydraulic actuator
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02Details
    • H01H33/28Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/30Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
    • H01H33/34Power arrangements internal to the switch for operating the driving mechanism using fluid actuator hydraulic
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H2009/0083Details of switching devices, not covered by groups H01H1/00 - H01H7/00 using redundant components, e.g. two pressure tubes for pressure switch
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/22Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3005Charging means
    • H01H3/301Charging means using a fluid actuator
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00Switches operated by change of a physical condition
    • H01H35/24Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/38Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by piston and cylinder

Definitions

  • the invention relates to a hydraulic storage module for a hydraulic spring-loaded drive for actuating a high-voltage switch, in particular a high-voltage circuit breaker, with the features specified in claim 1.
  • Spring-loaded actuators for actuating high-voltage circuit breakers are known, for example, from DE 3408909 A1.
  • the there described as a hydraulic drive spring drive for actuating the electrical high-voltage circuit breaker is housed together with a hydraulic accumulator with mechanical pressure holding device in a common pressure housing, in which the conveying member for the hydraulic fluid, a high-pressure pump, and a control unit are integrated together with the required hydraulic connections.
  • the hydraulic accumulator is provided to provide the hydraulic drive of the high voltage circuit breaker without a further supply of external energy pressure energy and to operate the drive as intended even in case of failure or interruption of the power supply.
  • EP 0829892 A1 a spring-loaded drive is described in which a storage spring pressurizes a fluid via a pressure body and at least two pressure pistons.
  • a drive rod of the Feder arrivedantriebes moves, which is attached to a slidable in a working cylinder drive piston.
  • the hydraulic system of the spring-loaded drive is depressurized.
  • the memory spring is merely biased in this state and expands axially maximum.
  • the storage spring presses the pressure body against a stop on the cylinder housing, whereby the pressure body is clamped between the stop and the storage spring.
  • the hydraulic system is under pressure.
  • the memory spring is stretched in this state and their axial extent is reduced.
  • the storage spring presses the pressure body against the pressure piston, which thereby pressurize the fluid.
  • the pressure body is clamped between the pressure piston and the storage spring.
  • Circuit-breaker drives which use disc springs in combination with a hydraulic piston as energy storage are also known from DE 3408909 A1.
  • the disc springs used for energy storage are compressed by a hydraulic piston and from a force-stroke characteristic of the spring can be a pressure-stroke curve of the piston derived, which is shown in Fig. 1b. Due to the degressive course of the force-stroke characteristic of the plate spring, it follows that the pressure change over a large part of the stroke of the piston is only weakly pronounced.
  • these coil springs may have a linear force-stroke characteristic, as shown in Fig. 1c, said characteristic curve can go in the worst case even in a progressive characteristic.
  • This characteristic also de can be correspondingly translated into a pressure-stroke curve of the piston and have a strong pressure change over the stroke.
  • This behavior proves to be unfavorable for hydraulic drives of high-voltage circuit breakers, due to the strong pressure change over the stroke, and leads to a strong pressure change over the storage stroke of the pressure piston of the energy storage compared to the disc springs occurring in declining-balance curve.
  • the object of the invention is to provide a memory module for a hydraulic spring-loaded drive for actuating a high-voltage switch, which is simple in construction and whose dynamic pressure-stroke curve is better adapted to the needs of a high-performance switch drive.
  • the memory module according to the invention for a hydraulic spring-loaded drive for actuating a high-voltage switch in particular a high-voltage circuit breaker comprises a spring element acting as energy storage and a fluid for transmitting the energy of the spring element by means of a movable accumulator piston on a piston rod for actuating the high-voltage switch, wherein the accumulator piston in a fluid filled pressure-tight housing protrudes and the housing forms a high pressure storage reservoir for the fluid.
  • the storage piston is guided in a first embodiment of the storage module according to the invention in a closure lid. In a second embodiment of the storage module according to the invention, the storage piston is guided in the pressure-tight housing.
  • the high-pressure storage reserve is connected via at least one projecting into the high-pressure storage reservoir sub-channel and a high-pressure channel connected thereto with a hydraulic system of the spring accumulator drive.
  • the accumulator piston closes a portion of the sub-channel from a certain piston stroke.
  • the spring element acting as energy storage is designed as a helical spring which cooperates with a storage cylinder arranged in a pressure housing, preferably designed as a plunger cylinder, in which a storage piston movable by fluid pressure is guided.
  • the plunger cylinder is designed as a hollow cylinder, in the opening of the accumulator piston is arranged to be movable.
  • the accumulator piston works at the same time as a control slide and closes with its attached to the piston top pressure from a certain piston a fluid-flow area of a high-pressure reservoir of the cylinder housing, wherein the piston stroke results from the fact that the storage module has stored more fluid in the high pressure reserve, as to carry out a CO circuit of the high voltage switch is necessary.
  • This throttling leads to a dynamic pressure change during the switching process on the downstream side of the throttle point as a function of the piston stroke.
  • the spring element of the storage module is thus tensioned when the pressure piston located on the accumulator piston is acted upon by hydraulic fluid, whereby the accumulator piston moves in the direction of the spring element.
  • a piston head is placed on the accumulator piston, the piston head protruding into the high-pressure accumulator reserve located in the pressure-tight housing.
  • the accumulator piston or the piston head have openings which form a connection between the high-pressure accumulator reservoir and at least one partial passage through which the fluid can flow.
  • the execution of the memory module as a plunger cylinder is achieved that in comparison with existing memory modules for high voltage switch actuators no additional components, such as seals are required on the piston head to realize the memory-stroke-dependent throttling.
  • Fig. 1 shows a comparison of so-called force-stroke characteristics of different springs with an idealized force-stroke curve
  • Fig. 2 shows an example of the execution of the memory module according to the invention for a hydraulic spring-loaded drive for actuating a
  • FIG 3 shows an example of the course of dynamic pressure-stroke characteristics of the memory module according to the invention.
  • FIG. 1 in comparison to an idealized force-stroke spring characteristic (Fig. 1a), the force-stroke characteristics of a plate spring (Fig. 1b) and a coil spring (Fig. 1c) shown in a storage module for mechanical energy storage can be used for a hydraulic spring accumulator drive.
  • Fig. 2 shows an example of the embodiment of the memory module according to the invention for a hydraulic spring drive for actuating a high-voltage circuit breaker, which is arranged in a container body, not shown.
  • the storage module comprises a spring element 51 which acts as an energy store and is designed as a helical spring, which is connected to a storage piston 30, which is arranged axially in a closure lid 20 and can be moved by fluid pressure.
  • the pressurized end of the accumulator piston 30 is designed as a cylindrical piston head 31.
  • the coil spring 51 is supported at one end on a support element 60 of the container body and at the other end on the protruding from the pressure housing 1 part of the accumulator piston 30 from.
  • the piston head 31, which is placed on the accumulator piston 30, has openings or bores 32 which designates the oil volume in the working space 13, also referred to as high-pressure accumulator reserve, of the pressure housing 1 with oil volume on the right-hand side of the piston head 31 shown in FIG connect and form a connection between the high pressure storage reservoir 13 and at least one part of the channel 11, 12 which can be flowed through by the fluid.
  • a storage piston 30 is provided without piston head 31, wherein the accumulator piston 30 has openings 32 at its projecting into the high-pressure storage reservoir side, which the connection between the high-pressure reservoir 13 and at least one flow-through part of the channel 11, 12 form.
  • the accumulator piston 30 operates as a spool valve and closes with its attached to the piston top pressure body 31 from a certain piston stroke s a portion of the fluid-flow region of a located within the housing 1 high pressure reservoir 13, also referred to as high-pressure volume or working space of the pressure housing.
  • These Throttling occurs as soon as the storage module has stored more fluid in the high-pressure storage reservoir 13 than is necessary to carry out a CO circuit of the high-voltage circuit breaker.
  • a throttling of the dynamic pressure in the high-pressure passage 10 in dependence on the piston stroke is achieved in an advantageous manner.
  • the high-pressure passage 10 is adjoined by a sub-passage designated as the first area 11 and a further sub-passage designated as the second area 12. While the memory module is subjected to low pressure, that is, the amount of energy stored in the memory module is sufficient for a CO circuit, a first region 11 and a second region 12 are flowed through by the fluid. Thus, there is no dynamic pressure reduction in the high pressure passage 10 during a switching operation. If the storage module subjected to high pressure, that is, the stored amount of energy is greater than necessary for a CO circuit, the first region 11 is closed by means of the pressure body 31 and it can only be flowed through the second region 12 with fluid. This results in a dynamic pressure reduction in the high pressure passage 10 during a switching operation.
  • the flow through at least one of the sub-channels 11, 12 is adjustable by means of a throttle element.
  • the high pressure seal 40 shown in FIG. 2 is provided for fluid sealing of the accumulator piston 30.
  • FIG. 3 shows an example of the course of a stroke-pressure curve K1 at a flow rate of 0 and compared the qualitative course of a stroke-pressure curve K2 for the C-circuit and a dynamic stroke-pressure curve K3 for the O.
  • the invention aims at adapting a dynamic pressure-stroke characteristic, which is due to hydraulic losses in the storage module.
  • the hydraulic losses are dependent on the volume flow of the high pressure fluid in the working space of the pressure housing and are not or only minimally influenced by the pressure within the high pressure storage volume.
  • the pressure change over the Speicherhub s of the memory module of the spring drive of the high-voltage switch is advantageously improved and the dynamic pressure-stroke characteristic, which arises due to hydraulic losses in the hydraulic system of the spring drive, depending on the stroke s of the accumulator piston 30th customized.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Actuator (AREA)

Abstract

The invention relates to a storage module for a hydraulic stored-energy spring mechanism for operating a high-voltage switch, in particular a high-voltage circuit breaker, having a spring element (51) which acts as an energy storage means and having a fluid for transmitting the energy of the spring element (51), by means of a moving storage piston (30), to a piston rod for operating the high-voltage switch, wherein the storage piston (30) projects into the housing (1) which is filled with fluid and the housing forms a high-pressure storage reservoir (13) for the fluid. The high-pressure storage reservoir (13) is connected to a hydraulic system of the stored-energy spring mechanism by means of at least one channel element (11), (12) which projects into the high-pressure storage reservoir (13) and a high-pressure channel (10) which is connected to said channel element. The storage piston (30) closes a subregion of the channel element (11), (12) starting from a specific piston stroke (s).

Description

Speichermodul für einen hydraulischen Federspeicherantrieb  Storage module for a hydraulic spring-loaded drive
Beschreibung description
Die Erfindung betrifft ein hydraulisches Speichermodul für einen hydraulischen Federspeicherantrieb zur Betätigung eines Hochspannungsschalters, insbesondere eines Hochspannungsleistungsschalters, mit den im Anspruch 1 angegebenen Merkmalen. The invention relates to a hydraulic storage module for a hydraulic spring-loaded drive for actuating a high-voltage switch, in particular a high-voltage circuit breaker, with the features specified in claim 1.
Federspeicherantriebe zum Betätigen von Hochspannungsleistungsschaltern sind beispielsweise aus der DE 3408909 A1 bekannt. Der dort beschriebene als hydraulischer Antrieb ausgeführte Federspeicherantrieb zur Betätigung des elektrischen Hochspannungsleistungsschalters ist gemeinsam mit einem Hydraulikspeicher mit mechanischer Druckhaltevorrichtung in einem gemeinsamen Druckgehäuse untergebracht, in das auch das Förderorgan für das Hydraulikfluid, eine Hochdruckpumpe, sowie eine Steuereinheit mitsamt den erforderlichen Hydraulikverbindungen integriert sind. Der Hydraulikspeicher ist dafür vorgesehen, dem hydraulischen Antrieb des Hochspannungsleistungsschalters ohne eine weitere Zufuhr von Fremdenergie Druckenergie bereitzustellen und den Antrieb auch bei einer Störung oder Unterbrechung der Energiezufuhr bestimmungsgemäß zu betätigen. Spring-loaded actuators for actuating high-voltage circuit breakers are known, for example, from DE 3408909 A1. The there described as a hydraulic drive spring drive for actuating the electrical high-voltage circuit breaker is housed together with a hydraulic accumulator with mechanical pressure holding device in a common pressure housing, in which the conveying member for the hydraulic fluid, a high-pressure pump, and a control unit are integrated together with the required hydraulic connections. The hydraulic accumulator is provided to provide the hydraulic drive of the high voltage circuit breaker without a further supply of external energy pressure energy and to operate the drive as intended even in case of failure or interruption of the power supply.
In der EP 0829892 A1 ist ein Federspeicherantrieb beschrieben bei dem eine Speicherfeder über einen Druckkörper und mindestens zwei Druckkolben ein Fluid unter Druck setzt. Mittels dieses Fluids wird eine Antriebsstange des Federspeicherantriebes bewegt, welche an einem in einem Arbeitszylinder gleitend verschiebbaren Antriebskolben befestigt ist. In EP 0829892 A1, a spring-loaded drive is described in which a storage spring pressurizes a fluid via a pressure body and at least two pressure pistons. By means of this fluid is a drive rod of the Federspeicherantriebes moves, which is attached to a slidable in a working cylinder drive piston.
Bei der Montage des Federspeicherantriebs sowie während notwendiger Wartungsarbeiten ist das Hydrauliksystem des Federspeicherantriebes drucklos. Die Speicherfeder ist in diesem Zustand lediglich vorgespannt und dehnt sich axial maximal aus. Die Speicherfeder presst dabei den Druckkörper gegen einen Anschlag am Zylindergehäuse, wodurch der Druckkörper zwischen dem Anschlag und der Speicherfeder festgeklemmt ist. During assembly of the spring-loaded drive and during necessary maintenance work, the hydraulic system of the spring-loaded drive is depressurized. The memory spring is merely biased in this state and expands axially maximum. The storage spring presses the pressure body against a stop on the cylinder housing, whereby the pressure body is clamped between the stop and the storage spring.
Während des Betriebs des Federspeicherantriebs steht das Hydrauliksystem unter Druck. Die Speicherfeder ist in diesem Zustand weiter gespannt und ihre axiale Ausdehnung ist verringert. Die Speicherfeder presst dabei den Druckkörper gegen den Druckkolben, welche dadurch das Fluid unter Druck setzen. Der Druckkörper ist zwischen den Druckkolben und der Speicherfeder festgeklemmt. During operation of the spring accumulator drive, the hydraulic system is under pressure. The memory spring is stretched in this state and their axial extent is reduced. The storage spring presses the pressure body against the pressure piston, which thereby pressurize the fluid. The pressure body is clamped between the pressure piston and the storage spring.
Leistungsschalterantriebe, die Tellerfedern in Kombination mit einem hydraulischen Kolben als Energiespeicher benutzen, sind ebenfalls aus der DE 3408909 A1 bekannt. Die zur Energiespeicherung eingesetzten Tellerfedern werden durch einen hydraulischen Kolben komprimiert und aus einer Kraft-Hub-Kennlinie der Feder lässt sich eine Druck-Hub-Kennlinie des Kolbens ableiten, die in Fig. 1b gezeigt ist. Durch den degressiven Verlauf der Kraft-Hub-Kennlinie der Tellerfeder ergibt sich daher, dass die Druckänderung über einen großen Teil des Hubes des Kolbens nur schwach ausgeprägt ist. Circuit-breaker drives which use disc springs in combination with a hydraulic piston as energy storage are also known from DE 3408909 A1. The disc springs used for energy storage are compressed by a hydraulic piston and from a force-stroke characteristic of the spring can be a pressure-stroke curve of the piston derived, which is shown in Fig. 1b. Due to the degressive course of the force-stroke characteristic of the plate spring, it follows that the pressure change over a large part of the stroke of the piston is only weakly pronounced.
Als Alternative zu der Verwendung der verhältnismäßig teueren Tellerfedern besteht generell die Möglichkeit, andere einfach aufgebaute und damit preisgünstigere Federtypen, wie beispielsweise Schraubenfedern, einzusetzen. Durch die große Verbreitung und einfache Fertigung sind Schraubenfedern wesentlich besser am Markt verfügbar als Tellerfedern. As an alternative to the use of relatively expensive disc springs is generally possible to use other simply constructed and thus cheaper spring types, such as coil springs. Due to the wide distribution and simple production, coil springs are much better available on the market than disc springs.
Im günstigsten Fall können diese Schraubenfedern eine lineare Kraft-Hub-Kennlinie aufweisen, wie sie in der Fig. 1c dargestellt ist, wobei diese Kennlinie im ungünstigen Fall sogar in eine progressive Kennlinie übergehen kann. Auch diese Kennlinie wür- de sich wieder entsprechend in eine Druck-Hub-Kennlinie des Kolbens übersetzen lassen und eine starke Druckänderung über dem Hub aufweisen. Dieses Verhalten erweist sich für hydraulische Antriebe von Hochspannungs-Leistungsschaltern, bedingt durch die starke Druckänderung über dem Hub, als ungünstig und führt im Vergleich zur bei Tellerfedern auftretenden degressiven Kennlinie zu einer starken Druckänderung über dem Speicherhub des Druckkolbens des Energiespeichers. In the best case, these coil springs may have a linear force-stroke characteristic, as shown in Fig. 1c, said characteristic curve can go in the worst case even in a progressive characteristic. This characteristic also de can be correspondingly translated into a pressure-stroke curve of the piston and have a strong pressure change over the stroke. This behavior proves to be unfavorable for hydraulic drives of high-voltage circuit breakers, due to the strong pressure change over the stroke, and leads to a strong pressure change over the storage stroke of the pressure piston of the energy storage compared to the disc springs occurring in declining-balance curve.
Aufgabe der Erfindung ist es, ein Speichermodul für einen hydraulischen Federspeicherantrieb zur Betätigung eines Hochspannungsschalters anzugeben, das einfach aufgebaut ist und dessen dynamische Druck-Hub-Kennlinie an die Bedürfnisse eines Hochleistungsschalterantriebes besser angepasst ist. The object of the invention is to provide a memory module for a hydraulic spring-loaded drive for actuating a high-voltage switch, which is simple in construction and whose dynamic pressure-stroke curve is better adapted to the needs of a high-performance switch drive.
Diese Aufgabe wird erfindungsgemäß durch ein Speichermodul zur mechanischen Energiespeicherung für einen hydraulischen Federspeicherantrieb zur Betätigung eines Hochspannungsschalters, insbesondere eines Hochspannungsleistungs- schalters, mit den im Anspruch 1 angegebenen Merkmalen gelöst. This object is achieved by a memory module for mechanical energy storage for a hydraulic spring drive for actuating a high-voltage switch, in particular a Hochspannungsleistungs- switch, with the features specified in claim 1.
Vorteilhafte Ausgestaltungen sind in den abhängigen Ansprüchen angegeben. Advantageous embodiments are specified in the dependent claims.
Um die Druckänderung über dem Speicherhub des Speichermoduls des Federspeicherantriebs des Hochspannungsschalters zu verbessern, wird mittels des erfindungsgemäßen Speichermoduls die dynamische Kennlinie, die auf Grund von hydraulischen Verlusten im Hydrauliksystem des Federspeicherantriebes bei der Entnahme eines Volumenstroms entsteht, speicherhubabhängig angepasst. In order to improve the pressure change over the storage stroke of the storage module of the spring drive of the high-voltage switch, the dynamic characteristic, which arises due to hydraulic losses in the hydraulic system of the spring accumulator drive in the removal of a volume flow, memory-stroke dependent adapted by means of the memory module according to the invention.
Das erfindungsgemäße Speichermodul für einen hydraulischen Federspeicherantrieb zur Betätigung eines Hochspannungsschalters, insbesondere eines Hochspannungsleistungsschalters, umfasst ein als Energiespeicher wirkendes Federelement und ein Fluid zur Übertragung der Energie des Federelementes mittels eines bewegbaren Speicherkolbens auf eine Kolbenstange zur Betätigung des Hochspannungsschalters, wobei der Speicherkolben in ein mit Fluid gefülltes druckdichtes Gehäuse hineinragt und das Gehäuse ein Hochdruckspeicherreservat für das Fluid bildet. Der Speicherkolben ist in einer ersten Ausführungsform des erfindungsgemäßen Speichermoduls in einem Verschlussdeckel geführt. In einer zweiten Ausführungsform des erfindungsgemäßen Speichermoduls ist der Speicherkolben im druckdichten Gehäuse geführt. The memory module according to the invention for a hydraulic spring-loaded drive for actuating a high-voltage switch, in particular a high-voltage circuit breaker comprises a spring element acting as energy storage and a fluid for transmitting the energy of the spring element by means of a movable accumulator piston on a piston rod for actuating the high-voltage switch, wherein the accumulator piston in a fluid filled pressure-tight housing protrudes and the housing forms a high pressure storage reservoir for the fluid. The storage piston is guided in a first embodiment of the storage module according to the invention in a closure lid. In a second embodiment of the storage module according to the invention, the storage piston is guided in the pressure-tight housing.
Das Hochdruckspeicherreservat ist über wenigstens einen in das Hochdruckspeicherreservat hineinragenden Teilkanal und einen daran angeschlossenen Hochdruckkanal mit einem Hydrauliksystem des Federspeicherantriebs verbunden. Der Speicherkolben verschließt ab einem bestimmten Kolbenhub einen Teilbereich des Teilkanals. The high-pressure storage reserve is connected via at least one projecting into the high-pressure storage reservoir sub-channel and a high-pressure channel connected thereto with a hydraulic system of the spring accumulator drive. The accumulator piston closes a portion of the sub-channel from a certain piston stroke.
In einer bevorzugten Ausführungsform ist das als Energiespeicher wirkende Federelement als Schraubenfeder ausgeführt, welches mit einem in einem Druckgehäuse angeordneten, vorzugsweise als Plungerzylinder ausgeführten, Speicherzylinder, in dem ein durch Fluiddruck bewegbarer Speicherkolben geführt ist, zusammenwirkt. Der Plungerzylinder ist als Hohlzylinder ausgeführt, in dessen Öffnung der Speicherkolben bewegbar angeordnet ist. In a preferred embodiment, the spring element acting as energy storage is designed as a helical spring which cooperates with a storage cylinder arranged in a pressure housing, preferably designed as a plunger cylinder, in which a storage piston movable by fluid pressure is guided. The plunger cylinder is designed as a hollow cylinder, in the opening of the accumulator piston is arranged to be movable.
Der Speicherkolben arbeitet dabei gleichzeitig als Steuerschieber und verschließt mit seinem am Kolbenanfang angebrachten Druckkörper ab einem gewissen Kolbenhub einen vom Fluid durchströmbaren Bereich eines Hochdruckspeicherreservats des Zylindergehäuses, wobei sich der Kolbenhub daraus ergibt, dass das Speichermodul mehr Fluid im Hochdruckreservat gespeichert hat, als zur Durchführung einer CO- Schaltung des Hochspannungsschalters notwendig ist. Diese Drosselung führt zu einer dynamischen Druckänderung während des Schaltvorgangs auf der abströmenden Seite der Drosselstelle in Abhängigkeit vom Kolbenhub. The accumulator piston works at the same time as a control slide and closes with its attached to the piston top pressure from a certain piston a fluid-flow area of a high-pressure reservoir of the cylinder housing, wherein the piston stroke results from the fact that the storage module has stored more fluid in the high pressure reserve, as to carry out a CO circuit of the high voltage switch is necessary. This throttling leads to a dynamic pressure change during the switching process on the downstream side of the throttle point as a function of the piston stroke.
Das Federelement des Speichermodul wird also gespannt, wenn der am Speicherkolben befindliche Druckkörper mit Hydraulikflüssigkeit beaufschlagt wird, wodurch sich der Speicherkolben in Richtung des Federelements bewegt. The spring element of the storage module is thus tensioned when the pressure piston located on the accumulator piston is acted upon by hydraulic fluid, whereby the accumulator piston moves in the direction of the spring element.
Die Rückbewegung des Speicherkolbens erfolgt durch die Entspannung des Federelements bei Druckabfall. Dabei verringert sich bei der Entspannung des Federelements das über dem Speicherkolben befindliches Hochdruckspeichervolumen. In einer vorteilhaften Ausführungsform des erfindungsgemäßen Speichermoduls ist auf dem Speicherkolben ein Kolbenkopf aufgesetzt, wobei der Kolbenkopf in das im druckdichten Gehäuse befindliche Hochdruckspeicherreservat hineinragt. The return movement of the accumulator piston takes place by the relaxation of the spring element at pressure drop. During the expansion of the spring element, the high-pressure accumulator volume located above the accumulator piston is reduced. In an advantageous embodiment of the memory module according to the invention, a piston head is placed on the accumulator piston, the piston head protruding into the high-pressure accumulator reserve located in the pressure-tight housing.
Erfindungsgemäß weisen der Speicherkolben oder der Kolbenkopf Öffnungen auf, die eine Verbindung zwischen dem Hochdruckspeicherreservat und wenigstens einem vom Fluid durchströmbaren Teilkanal bilden. According to the invention, the accumulator piston or the piston head have openings which form a connection between the high-pressure accumulator reservoir and at least one partial passage through which the fluid can flow.
Durch die Ausführung des Speichermoduls als Plungerzylinder wird erreicht, dass im Vergleich mit bestehenden Speichermodulen für Hochspannungsschalterantriebe keine zusätzlichen Komponenten, wie beispielsweise Dichtungen am Kolbenkopf benötigt werden, um die die speicherhubabhängige Drosselung zu realisieren. By the execution of the memory module as a plunger cylinder is achieved that in comparison with existing memory modules for high voltage switch actuators no additional components, such as seals are required on the piston head to realize the memory-stroke-dependent throttling.
Anhand der nachfolgenden Figuren werden die Erfindung, vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung, sowie weitere Vorteile näher erläutert und beschrieben. With reference to the following figures, the invention, advantageous embodiments and improvements of the invention, and further advantages are explained and described in detail.
Es zeigt: It shows:
Fig. 1 zeigt einen Vergleich sogenannter Kraft-Hub-Kennlinien von verschiedenen Federn mit einer idealisierten Kraft-Hub-Kennlinie, Fig. 2 zeigt beispielhaft die Ausführung des erfindungsgemäßen Speichermoduls für einen hydraulischen Federspeicherantrieb zur Betätigung einesFig. 1 shows a comparison of so-called force-stroke characteristics of different springs with an idealized force-stroke curve, Fig. 2 shows an example of the execution of the memory module according to the invention for a hydraulic spring-loaded drive for actuating a
Hochspannungsleistungsschalters, und High voltage circuit breaker, and
Fig. 3 zeigt beispielhaft den Verlauf von dynamischen Druck-Hub-Kennlinien des erfindungsgemäßen Speichermoduls. 3 shows an example of the course of dynamic pressure-stroke characteristics of the memory module according to the invention.
In Fig. 1 sind im Vergleich zu einer idealisierten Kraft-Hub-Federkennlinie (Fig. 1a) die Kraft-Hub-Kennlinien einer Tellerfeder (Fig. 1b) und einer Schraubenfeder (Fig. 1c) gezeigt, die in einem Speichermodul zur mechanischen Energiespeicherung für einen hydraulischen Federspeicherantrieb einsetzbar sind. Fig. 2 zeigt beispielhaft die Ausführung des erfindungsgemäßen Speichermoduls für einen hydraulischen Federspeicherantrieb zur Betätigung eines Hochspannungs- leistungsschalters, welches in einem nicht dargestellten Behälterkörper angeordnet ist. In Fig. 1, in comparison to an idealized force-stroke spring characteristic (Fig. 1a), the force-stroke characteristics of a plate spring (Fig. 1b) and a coil spring (Fig. 1c) shown in a storage module for mechanical energy storage can be used for a hydraulic spring accumulator drive. Fig. 2 shows an example of the embodiment of the memory module according to the invention for a hydraulic spring drive for actuating a high-voltage circuit breaker, which is arranged in a container body, not shown.
Das Speichermodul umfasst ein als Energiespeicher wirkendes, als Schraubenfeder ausgeführtes Federelement 51 , dass mit einem in einem Druckgehäuse 1 angeordneten und durch Fluiddruck bewegbaren Speicherkolben 30, der axial in einem Verschlussdeckel 20 geführt ist, verbunden ist. Das druckbeaufschlagte Ende des Speicherkolbens 30 ist als zylindrischer Kolbenkopf 31 ausgeführt. The storage module comprises a spring element 51 which acts as an energy store and is designed as a helical spring, which is connected to a storage piston 30, which is arranged axially in a closure lid 20 and can be moved by fluid pressure. The pressurized end of the accumulator piston 30 is designed as a cylindrical piston head 31.
Die Schraubenfeder 51 stützt sich mit einem Ende an einem Abstützelement 60 des Behälterkörpers und mit dem anderen Ende am aus dem Druckgehäuse 1 herausragenden Teil des Speicherkolbens 30 ab. The coil spring 51 is supported at one end on a support element 60 of the container body and at the other end on the protruding from the pressure housing 1 part of the accumulator piston 30 from.
Der Kolbenkopf 31 , der auf den Speicherkolben 30 aufgesetzt ist, weist Öffnungen bzw. Bohrungen 32 auf, die das Ölvolumen im Arbeitsraum 13, auch als Hochdruckspeicherreservat bezeichnet, des Druckgehäuses 1 mit Ölvolumen auf der in der Fig. 2 gezeigten rechten Seite des Kolbenkopfes 31 verbinden und eine Verbindung zwischen dem Hochdruckspeicherreservat 13 und wenigstens einem vom Fluid durchströmbaren Teilkanal 11 , 12 bilden. The piston head 31, which is placed on the accumulator piston 30, has openings or bores 32 which designates the oil volume in the working space 13, also referred to as high-pressure accumulator reserve, of the pressure housing 1 with oil volume on the right-hand side of the piston head 31 shown in FIG connect and form a connection between the high pressure storage reservoir 13 and at least one part of the channel 11, 12 which can be flowed through by the fluid.
In einer alternativen hier nicht dargestellten Ausführungsform des erfindungsgemäßen Speichermoduls ist ein Speicherkolben 30 ohne Kolbenkopf 31 vorgesehen, wobei der Speicherkolben 30 an seiner in das Hochdruckspeicherreservat hineinragenden Seite Öffnungen 32 aufweist, welche die Verbindung zwischen dem Hochdruckspeicherreservat 13 und wenigstens einem vom Fluid durchströmbaren Teilkanal 11 , 12 bilden. In an alternative embodiment of the storage module according to the invention not shown here, a storage piston 30 is provided without piston head 31, wherein the accumulator piston 30 has openings 32 at its projecting into the high-pressure storage reservoir side, which the connection between the high-pressure reservoir 13 and at least one flow-through part of the channel 11, 12 form.
Der Speicherkolben 30 arbeitet als Steuerschieber und verschließt mit seinem am Kolbenanfang angebrachten Druckkörper 31 ab einem bestimmten Kolbenhub s einen Teilbereich des vom Fluid durchströmbaren Bereich eines innerhalb des Gehäuses 1 befindlichen Hochdruckspeicherreservats 13, auch als Hochdruckvolumen oder Arbeitsraum des Druckgehäuses bezeichnet. Diese Drosselung tritt ein, sobald das Speichermodul mehr Fluid im Hochdruckspeicherreservat 13 gespeichert hat, als zur Durchführung einer CO- Schaltung des Hochspannungsleistungsschalters notwendig ist. Dadurch wird in vorteilhafter Weise eine Drosselung des dynamischen Drucks im Hochdruckkanal 10 in Abhängigkeit vom Kolbenhub s erreicht. The accumulator piston 30 operates as a spool valve and closes with its attached to the piston top pressure body 31 from a certain piston stroke s a portion of the fluid-flow region of a located within the housing 1 high pressure reservoir 13, also referred to as high-pressure volume or working space of the pressure housing. These Throttling occurs as soon as the storage module has stored more fluid in the high-pressure storage reservoir 13 than is necessary to carry out a CO circuit of the high-voltage circuit breaker. As a result, a throttling of the dynamic pressure in the high-pressure passage 10 in dependence on the piston stroke is achieved in an advantageous manner.
An den Hochdruckkanal 10 schließen sich ein als erster Bereich 11 bezeichneter Teilkanal und ein als zweiter Bereich 12 bezeichneter weiterer Teilkanal an. Während das Speichermodul mit geringem Druck beaufschlagt wird, das heißt die im Speichermodul gespeicherte Energiemenge ist ausreichend für eine CO-Schaltung, werden ein erster Bereich 11 und ein zweiter Bereich 12 vom Fluid durchströmt. Damit erfolgt keine dynamische Druckminderung im Hochdruckkanal 10 während eines Schaltvorgangs. Ist das Speichermodul mit hohem Druck beaufschlagt, das heißt die gespeicherte Energiemenge ist größer als für eine CO-Schaltung notwendig, wird der erste Bereich 11 mittels des Druckkörpers 31 verschlossen und es kann nur noch der zweite Bereich 12 mit Fluid durchströmt werden. Damit erfolgt eine dynamische Druckminderung im Hochdruckkanal 10 während eines Schaltvorgangs. The high-pressure passage 10 is adjoined by a sub-passage designated as the first area 11 and a further sub-passage designated as the second area 12. While the memory module is subjected to low pressure, that is, the amount of energy stored in the memory module is sufficient for a CO circuit, a first region 11 and a second region 12 are flowed through by the fluid. Thus, there is no dynamic pressure reduction in the high pressure passage 10 during a switching operation. If the storage module subjected to high pressure, that is, the stored amount of energy is greater than necessary for a CO circuit, the first region 11 is closed by means of the pressure body 31 and it can only be flowed through the second region 12 with fluid. This results in a dynamic pressure reduction in the high pressure passage 10 during a switching operation.
In einer vorteilhaften Ausgestaltung des erfindungsgemäßen Speichermoduls ist der Durchfluss durch wenigstens einen der Teilkanäle 11 ,12 mittels eines Drosselelements einstellbar. In an advantageous embodiment of the memory module according to the invention, the flow through at least one of the sub-channels 11, 12 is adjustable by means of a throttle element.
Die in der Fig. 2 dargestellte Hochdruckdichtung 40 ist zur Fluidabdichtung des Speicherkolbens 30 vorgesehen. The high pressure seal 40 shown in FIG. 2 is provided for fluid sealing of the accumulator piston 30.
Die Fig. 3 zeigt beispielhaft den Verlauf einer Hub-Druck-Kennlinie K1 bei einem Volumenstrom von 0 und dem gegenübergestellt den qualitativen Verlauf einer Hub- Druck-Kennlinie K2 für die C-Schaltung und einer dynamischen Hub-Druck-Kennlinie K3 für die O-Schaltung des Hochspannungsleistungsschalters bei einem Volumenstrom größer 0 wenn der Volumenstrom bei der O-Schaltung größer ist als der Volumemstrom bei der C-Schaltung, wobei jeweils der Hub s des Speicherkolbens 30 über dem Druck im System aufgezeigt ist. Da die in der Fig. 1c dargestellte statische Kraft-Hub-Kennlinie der im Speichermodul eingesetzten Schraubenfeder nur schwer beeinflusst und so an die Bedürfnisse des Hochleistungsschalterantriebes angepasst werden kann, zielt die Erfindung auf eine Anpassung einer dynamischen Druck-Hub-Kennlinie ab, die sich aufgrund von hydraulischen Verlusten im Speichermodul ergibt. Die hydraulischen Verluste sind vom Volumenstrom des Hochdruckfluids im Arbeitsraum des Druckgehäuses abhängig und werden nicht oder nur minimal vom Druck innerhalb des Hochdruckspeichervolumens beeinflusst. 3 shows an example of the course of a stroke-pressure curve K1 at a flow rate of 0 and compared the qualitative course of a stroke-pressure curve K2 for the C-circuit and a dynamic stroke-pressure curve K3 for the O. Circuit of the high-voltage circuit breaker at a volume flow greater than 0 when the volume flow in the O-circuit is greater than the volume flow in the C-circuit, wherein each of the stroke s of the accumulator piston 30 is shown above the pressure in the system. Since the static force-stroke characteristic shown in FIG. 1c of the coil spring used in the memory module is difficult to influence and can thus be adapted to the needs of the high-performance switch drive, the invention aims at adapting a dynamic pressure-stroke characteristic, which is due to hydraulic losses in the storage module. The hydraulic losses are dependent on the volume flow of the high pressure fluid in the working space of the pressure housing and are not or only minimally influenced by the pressure within the high pressure storage volume.
Wird nun dem Speichermodul Energie in einer bestimmten Geschwindigkeit entnommen, fließt also ein definierter Volumenstrom Q, so entsteht ein Druckverlust DV1 , DV2 direkt im Arbeitsraum des Speichermoduls (siehe Kurve K3). An der Betätigungsvorrichtung des Leistungsschalters steht daher ein geringerer Druck an als im statischen Fall, bei dem kein Volumenstrom Q fließt (siehe Kurve K1). Der Druckverlust ist höher, je größer der Volumenstrom ist und ausschließlich von ihm abhängig (siehe Kurve K3). If energy is taken from the memory module at a certain speed, ie a defined volume flow Q flows, a pressure loss DV1, DV2 arises directly in the working space of the memory module (see curve K3). Therefore, a lower pressure acts on the actuating device of the circuit breaker than in the static case, in which no volume flow Q flows (see curve K1). The pressure loss is higher, the larger the volume flow and only dependent on it (see curve K3).
Mit dem erfindungsgemäßen Speichermodul wird in vorteilhafter Weise die Druckänderung über dem Speicherhub s des Speichermoduls des Federspeicherantriebs des Hochspannungsschalters verbessert und die dynamische Druck-Hub-Kennlinie, die auf Grund von hydraulischen Verlusten im Hydrauliksystem des Federspeicherantriebes entsteht, in Abhängigkeit vom Hub s des Speicherkolbens 30 angepasst. With the memory module according to the invention, the pressure change over the Speicherhub s of the memory module of the spring drive of the high-voltage switch is advantageously improved and the dynamic pressure-stroke characteristic, which arises due to hydraulic losses in the hydraulic system of the spring drive, depending on the stroke s of the accumulator piston 30th customized.
Steigt also der statische Druck im Speichermodul an, so erhöhen sich die Systemverluste, so dass im dynamischen Fall, also einem Volumenstrom Q ungleich 0, die zur Verfügung gestellte Energie des Speichermoduls reduziert wird. Für den Einsatz auf hydraulischen Antrieben für Hochspannungs-Leistungsschalter empfiehlt es sich zudem, genau einen Schaltpunkt SP zu integrieren, an dem der Verlust geändert wird. Dieser Schaltpunkt SP bedingt einen stufenförmigen Verlauf der dynamischen Kennlinien K2 und K3. Der Volumenstrom Q unterscheidet sich in der Regel zwischen einer O-Schaltung und einer C-Schaltung. Dies ist in Fig. 3 beispielhaft als qualitativer Verlauf der Kennlinie K2 für die C-Schaltung und der dynamischen Kennlinie K3 für die O-Schaltung gezeigt, wobei jeweils der Hub s des Speicherkolbens 30 über dem Druck im System dargestellt ist. Bezugszeichenliste Thus, if the static pressure increases in the storage module, the system losses increase, so that in the dynamic case, ie a volume flow Q not equal to 0, the energy provided by the storage module is reduced. For use on hydraulic drives for high-voltage circuit-breakers, it is also recommended to integrate exactly one switching point SP at which the loss is changed. This switching point SP requires a step-shaped course of the dynamic characteristics K2 and K3. The volume flow Q usually differs between an O-circuit and a C-circuit. This is shown in Fig. 3 by way of example as a qualitative course of the characteristic K2 for the C-circuit and the dynamic characteristic K3 for the O-circuit, wherein in each case the stroke s of the accumulator piston 30 is shown above the pressure in the system. LIST OF REFERENCE NUMBERS
I druckdichtes Gehäuse, Druckgehäuse I pressure-tight housing, pressure housing
10 Hochdruckkanal (gefüllt mit unter Hochdruck stehendem Fluid)  10 high-pressure channel (filled with high-pressure fluid)
I I erster Bereich, Teilkanal  I I first area, subchannel
12 zweiter Bereich, weiterer Teilkanal  12 second area, another sub-channel
13 Hochdruckspeicherreservat, Hochdruckvolumen, Arbeitsraum im  13 high-pressure storage reserve, high-pressure volume, working space in the
Druckgehäuse  pressure housing
20 Verschlussdeckel  20 closure lid
30 Speicherkolben  30 accumulator pistons
31 Druckkörper, Kolbenkopf  31 pressure hull, piston head
32 Öffnungen, Bohrungen im Kolbenkopf  32 openings, holes in the piston head
40 Hochdruckdichtung 40 high pressure seal
51 Federelement, Schraubenfeder  51 spring element, coil spring
60 Abstützelement  60 support element
s Hub des Speicherkolbens s Stroke of the accumulator piston
DV1 Druckverlust im Hydrauliksystem des Federspeicherantriebes auf Grund von niedrigen Verlusten im Hydrauliksystem  DV1 Pressure loss in the hydraulic system of the spring accumulator drive due to low losses in the hydraulic system
DV2 Druckverlust im Hydrauliksystem des Federspeicherantriebes auf Grund von hohen Verlusten im Hydrauliksystem  DV2 Pressure loss in the hydraulic system of the spring accumulator drive due to high losses in the hydraulic system
SP Schaltpunkt  SP switching point
Q Volumenstrom  Q volumetric flow
K1 Hub-Druck-Kennlinie  K1 stroke-pressure characteristic
K2 Hub-Druck-Kennlinie für eine C-Schaltung  K2 stroke-pressure characteristic for a C-circuit
K3 Hub-Druck-Kennlinie für eine O-Schaltung  K3 stroke-pressure characteristic for an O-circuit

Claims

Patentansprüche claims
Speichermodul für einen Federspeicherantrieb zur Betätigung eines Hochspannungsschalters, insbesondere eines Hochspannungsleistungs- schalters, mit einem als Energiespeicher wirkendem Federelement (51) und mit einem Fluid zur Übertragung der Energie des Federelementes (51) mittels eines bewegbaren Speicherkolbens (30) auf eine Kolbenstange zur Betätigung des Hochspannungsschalters, wobei der Speicherkolben (30) in ein mit Fluid gefülltes druckdichtes Gehäuse (1) hineinragt und das Gehäuse ein Hochdruckspeicherreservat (13) für das Fluid bildet, dadurch gekennzeichnet, dass das Hochdruckspeicherreservat (13) über wenigstens einen in das Hochdruckspeicherreservat (13) hineinragenden Teilkanal (11), (12) und einen daran angeschlossenen Hochdruckkanal (10) mit einem Hydrauliksystem des Federspeicherantriebs verbunden ist, und der Speicherkolben (30) ab einem bestimmten Kolbenhub (s) einen Teilbereich des Teilkanals (11), (12) verschließt. A memory module for a spring-loaded drive for actuating a high-voltage switch, in particular a high-voltage circuit breaker, with a spring element (51) acting as an energy store and with a fluid for transmitting the energy of the spring element (51) to a piston rod for actuating the spring element (30) by means of a movable accumulator piston (30) High-voltage switch, wherein the accumulator piston (30) protrudes into a fluid-filled pressure-tight housing (1) and the housing forms a high-pressure reservoir (13) for the fluid, characterized in that the high-pressure accumulator reservoir (13) via at least one in the high-pressure reservoir (13) projecting sub-channel (11), (12) and a high-pressure channel (10) connected to a hydraulic system of the spring drive, and the accumulator piston (30) from a certain piston stroke (s) a portion of the sub-channel (11), (12) closes ,
Speichermodul nach Anspruch 1 , dadurch gekennzeichnet, dass das Federelement (51) als Schraubenfeder ausgeführt ist. Memory module according to claim 1, characterized in that the spring element (51) is designed as a helical spring.
Speichermodul nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Speicherkolben (30) in einem Verschlussdeckel (20) oder im druckdichtem Gehäuse (1) geführt ist. Memory module according to claim 1 or 2, characterized in that the storage piston (30) in a closure cover (20) or in the pressure-tight housing (1) is guided.
Speichermodul nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass auf dem Speicherkolben (30) ein Kolbenkopf (31) aufgesetzt ist und der Kolbenkopf (31) in das im druckdichten Gehäuse (1) befindliche Hochdruckspeicherreservat (13) hineinragt. Memory module according to one of the preceding claims, characterized in that a piston head (31) is placed on the accumulator piston (30) and the piston head (31) protrudes into the high-pressure accumulator reservoir (13) located in the pressure-tight housing (1).
Speichermodul nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Speicherkolben (30) oder der Kolbenkopf (31) Öffnungen (32) aufweist, die eine Verbindung zwischen dem Hochdruckspeicherreservat (13) und wenigstens einem vom Fluid durchströmbaren Teilkanal (11), (12) bilden. Storage module according to one of the preceding claims, characterized in that the accumulator piston (30) or the piston head (31) openings (32) having a connection between the high-pressure storage reservoir (13) and at least one flow-through partial fluid channel (11) (12 ) form.
6. Speichermodul nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Hochdruckspeicherreservat (13) über zwei in das Hochdruckspeicherreservat (13) hineinragende Teilkanäle (11), (12) und einen daran angeschlossenen Hochdruckkanal (10) mit dem Hydrauliksystem des Federspeicherantriebs verbunden ist. 6. Storage module according to one of the preceding claims, characterized in that the high-pressure storage reservoir (13) via two in the high-pressure reservoir (13) projecting sub-channels (11), (12) and a high-pressure channel connected thereto (10) is connected to the hydraulic system of the spring accumulator drive ,
7. Speichermodul nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Durchfluss durch wenigstens einen der Teilkanäle (11), (12) mittels eines Drosselelements einstellbar ist. 7. Memory module according to one of the preceding claims, characterized in that the flow through at least one of the sub-channels (11), (12) is adjustable by means of a throttle element.
8. Speichermodul nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass wenigstens ein Teilkanal (11), (12) mittels des Kolbenkopfes (31) verschlossen ist, wenn das Speichermodul mit hohem Druck beaufschlagt ist, wodurch sich eine dynamische Druckminderung im Hochdruckkanal (10) während eines Schaltvorgangs des Schalters einstellt. 8. Storage module according to one of the preceding claims, characterized in that at least one sub-channel (11), (12) by means of the piston head (31) is closed when the storage module is subjected to high pressure, resulting in a dynamic pressure reduction in the high-pressure channel (10 ) during a switching operation of the switch.
9. Speichermodul nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass sich der Kolbenhub (s) daraus ergibt, dass das Speichermodul mehr Fluid im Hochdruckreservat (13) gespeichert hat, als zur Durchführung einer CO-Schaltung des Hochspannungsschalters notwendig ist. 9. Storage module according to one of the preceding claims, characterized in that the piston stroke (s) results from the fact that the storage module has stored more fluid in the high pressure reserve (13) than is necessary to carry out a CO circuit of the high voltage switch.
10. Speichermodul nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das Speichermodul als Plungerzylinder ausgeführt ist. 10. Memory module according to one of the preceding claims, characterized in that the memory module is designed as a plunger cylinder.
11. Hochspannungsleistungsschalterantrieb der mit einem Speichermodul nach einem der vorstehenden Ansprüche versehen ist. 11. High-voltage circuit breaker drive is provided with a memory module according to one of the preceding claims.
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