EP0241816A1 - Entraînement hydraulique pour un appareil de coupure - Google Patents

Entraînement hydraulique pour un appareil de coupure Download PDF

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Publication number
EP0241816A1
EP0241816A1 EP87104891A EP87104891A EP0241816A1 EP 0241816 A1 EP0241816 A1 EP 0241816A1 EP 87104891 A EP87104891 A EP 87104891A EP 87104891 A EP87104891 A EP 87104891A EP 0241816 A1 EP0241816 A1 EP 0241816A1
Authority
EP
European Patent Office
Prior art keywords
hydraulic fluid
working cylinder
fluid reservoir
hydraulic
hydraulic drive
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
EP87104891A
Other languages
German (de)
English (en)
Other versions
EP0241816B1 (fr
Inventor
Gerhard Mauthe
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Publication of EP0241816A1 publication Critical patent/EP0241816A1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
    • H01H33/34—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator hydraulic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/625—Accumulators

Definitions

  • the invention is based on a hydraulic drive device according to the first part of patent claim 1.
  • the invention relates to a state of the art of hydraulic drive devices, as described, for example, in German Patent No. 21 64 759 or in European Patent No. 0 061 786.
  • the known drive devices each have a hydraulic fluid reservoir, the energy of which is quickly stored and is usually stored with the aid of compression springs or highly compressed gas is used for rapid actuation of the contact arrangement of the switching device. Since the available hydraulic fluid reservoirs have a volume filled with hydraulic fluid and at least partially with gas, leaks at the boundary between these two volumes cannot be ruled out in such reservoirs, as a result of which the availability of the hydraulic drive and thus of the switching device may be considerably impaired.
  • the invention as characterized in the claims, is based on the task of a hydraulic To create drive device, which is characterized by simple and robust construction and at the same time ensures high availability of the electrical switching device driven thereby.
  • the hydraulic drive device according to the invention is characterized by a simple structure, great economy and low maintenance requirements. In addition, it is particularly advantageously adapted to the needs of electrical switching devices with regard to high availability and a comparatively small number of drive processes.
  • the single figure shows a basic circuit diagram of a hydraulic drive device according to the invention.
  • lines under high pressure are thick and temporarily or continuously thin under lines under low pressure.
  • a contact arrangement, designated 1 in the figure, of an electrical high-voltage switching device is actuated via a piston rod 2 of a hydraulic piston-cylinder arrangement 3.
  • the piston-cylinder arrangement 3 has a working cylinder 4 and a differential piston 5.
  • the smaller hydraulically effective area of the differential piston 5 delimits a working cylinder space 6, the larger hydraulically effective area, on the other hand, defines a working cylinder space 7 of the piston-cylinder arrangement 3.
  • 8 denotes a hydraulic fluid reservoir which is permanently connected to the working cylinder space 6.
  • This hydraulic fluid reservoir 8 has an almost constant storage volume filled with a comparatively well compressible hydraulic fluid.
  • Well compressible hydraulic fluids are, for example, mineral or silicone oil, the volumes of which are approx. 4.5 - 5.5% or 7-10% lower at 1000 bar than at 1 bar.
  • the storage volume is generally filled exclusively with the hydraulic fluid, however, with regard to an increase in the energy storage capacity of the hydraulic fluid storage 8, it may be advantageous to introduce a comparatively small proportion of a highly compressible mass into the storage volume.
  • a mass can be, for example, closed-pore silicone rubber.
  • the storage volume of the hydraulic fluid reservoir 8 is generally dimensioned such that the pressure loss in the hydraulic fluid reservoir 8 is at most 25% of the maximum permissible reservoir pressure due to the hydraulic fluid volume supplied to the first or second working cylinder chamber 6, 7 when the switching device is actuated. This means that when using a mineral oil with a volume reduction of 5% at 1000 bar, approx. 130 ml hydraulic fluid is available to carry out a switching operation in a 10 l tank with a permissible storage pressure of 1000 bar.
  • This low-pressure accumulator 13 has a gas cushion under slight positive pressure, the volume of which is dimensioned such that it is at a pressure equalization between the hydraulic fluid accumulator 8 and the low-pressure accumulator 13 at the maximum permissible temperature under a pressure of a few, for example 2-3, bar .
  • There is also an overpressure between the hydraulic fluid reservoir and the low-pressure reservoir Valve 14 is provided, which causes a pressure relief of the hydraulic fluid reservoir 8 above the maximum permissible pressure of the fluid provided in the hydraulic fluid reservoir 8.
  • a pump 15 discharging hydraulic fluid from the low-pressure reservoir 13 conveys compressed hydraulic fluid into the hydraulic fluid reservoir 8 if required.
  • the working valve 9 When the switching device is switched off, as shown in the figure, the working valve 9 is first activated via a hydraulically operated control element 16 in such a way that the outputs 11 and 12 are connected to one another and the working cylinder chamber 7 can now be relieved via the working valve 9 into the low-pressure accumulator 13. Since hydraulic fluid of high pressure is constantly present in the working cylinder chamber 6, the differential piston 5 is moved downward and the contact arrangement of the switching device via the piston rod 2 is thus opened. Accordingly, when switching on, which is not shown in the figure, the working valve 9 is controlled via the control member 16 in such a way that the input 10 is connected to the output 11 and hydraulic fluid is now conveyed from the hydraulic fluid reservoir 8 into the working cylinder space 7. Because of the differential effect of the pressures in the working cylinder chambers 7 and 6, the differential piston 5 is now moved upwards and the contact arrangement 1 of the switching device is closed via the piston rod 1.
  • a switching device Since a switching device is generally only required to master an off-on-off switching cycle that occurs within a short period of time, even when using a commercially available hydraulic mineral oil as hydraulic fluid, it is sufficient to drive the high-voltage circuit breaker hydraulic fluid reservoir 8 with a storage volume of a few liters.
  • silicone oil as the hydraulic fluid, possibly with the addition of highly compressible mass, the storage volumes or the maximum storage pressures of the hydraulic fluid reservoir 8 can be reduced.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Actuator (AREA)
  • Control Of Presses (AREA)
EP87104891A 1986-04-16 1987-04-02 Entraînement hydraulique pour un appareil de coupure Expired - Lifetime EP0241816B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863612827 DE3612827A1 (de) 1986-04-16 1986-04-16 Hydraulischer antrieb fuer ein elektrisches schaltgeraet
DE3612827 1986-04-16

Publications (2)

Publication Number Publication Date
EP0241816A1 true EP0241816A1 (fr) 1987-10-21
EP0241816B1 EP0241816B1 (fr) 1992-07-29

Family

ID=6298810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104891A Expired - Lifetime EP0241816B1 (fr) 1986-04-16 1987-04-02 Entraînement hydraulique pour un appareil de coupure

Country Status (2)

Country Link
EP (1) EP0241816B1 (fr)
DE (2) DE3612827A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0476906A2 (fr) * 1990-09-17 1992-03-25 Hitachi, Ltd. Mécanisme interrupteur
US5343009A (en) * 1990-12-17 1994-08-30 Hitachi, Ltd. Data processing device and plug-in package
WO2012171618A1 (fr) * 2011-06-16 2012-12-20 Voith Patent Gmbh Dispositif d'actionnement hydraulique d'un organe de fermeture

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4227562A1 (de) * 1992-08-20 1994-02-24 Abb Patent Gmbh Verfahren zum Steuern eines Hydraulikantriebes
DE102012207640A1 (de) * 2012-05-08 2013-11-14 Siemens Aktiengesellschaft Schaltanordnung
DE102013008955A1 (de) * 2013-05-27 2014-11-27 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Stelleinrichtung für bewegungsbetätigte Vorrichtungen in Kraftfahrzeugen mit nur einem einzigen Schaltventil

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1177720B (de) * 1961-05-19 1964-09-10 Siemens Ag Energiespeicher
CH391058A (de) * 1961-05-26 1965-04-30 Siemens Ag Hydraulisches Antriebsgestänge für Schalter
DE2164759A1 (de) * 1971-12-13 1973-06-14 Bbc Brown Boveri & Cie Hydraulischer antrieb, insbesondere fuer elektrische schaltgeraete
DE2851478A1 (de) * 1978-11-28 1980-06-04 Mts Systems Gmbh Schnell schaltende antriebsvorrichtung
DE2512480B2 (de) * 1974-03-26 1980-10-02 Jean Louis Neuilly- Sur-Seine Hauts-De-Seine Gratzmuller (Frankreich) Ventilvorrichtung für einen hydraulisch betätigbaren elektrischen Leistungsschalter
EP0061786A1 (fr) * 1981-03-26 1982-10-06 BBC Brown Boveri AG Commande hydraulique ou pneumatique
DE3333597A1 (de) * 1983-09-16 1985-04-18 Wilkhahn Wilkening + Hahne GmbH + Co, 3252 Bad Münder Druckspeicher

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1177720B (de) * 1961-05-19 1964-09-10 Siemens Ag Energiespeicher
CH391058A (de) * 1961-05-26 1965-04-30 Siemens Ag Hydraulisches Antriebsgestänge für Schalter
DE2164759A1 (de) * 1971-12-13 1973-06-14 Bbc Brown Boveri & Cie Hydraulischer antrieb, insbesondere fuer elektrische schaltgeraete
DE2512480B2 (de) * 1974-03-26 1980-10-02 Jean Louis Neuilly- Sur-Seine Hauts-De-Seine Gratzmuller (Frankreich) Ventilvorrichtung für einen hydraulisch betätigbaren elektrischen Leistungsschalter
DE2851478A1 (de) * 1978-11-28 1980-06-04 Mts Systems Gmbh Schnell schaltende antriebsvorrichtung
EP0061786A1 (fr) * 1981-03-26 1982-10-06 BBC Brown Boveri AG Commande hydraulique ou pneumatique
DE3333597A1 (de) * 1983-09-16 1985-04-18 Wilkhahn Wilkening + Hahne GmbH + Co, 3252 Bad Münder Druckspeicher

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0476906A2 (fr) * 1990-09-17 1992-03-25 Hitachi, Ltd. Mécanisme interrupteur
EP0476906A3 (en) * 1990-09-17 1992-10-28 Hitachi, Ltd. Switch mechanism
US5502290A (en) * 1990-09-17 1996-03-26 Hitachi, Ltd. Switch mechanism
EP0677859A3 (fr) * 1990-09-17 1996-03-27 Hitachi Ltd Mécanisme interrupteur.
US5343009A (en) * 1990-12-17 1994-08-30 Hitachi, Ltd. Data processing device and plug-in package
WO2012171618A1 (fr) * 2011-06-16 2012-12-20 Voith Patent Gmbh Dispositif d'actionnement hydraulique d'un organe de fermeture

Also Published As

Publication number Publication date
DE3780679D1 (de) 1992-09-03
DE3612827C2 (fr) 1988-06-09
DE3612827A1 (de) 1987-10-22
EP0241816B1 (fr) 1992-07-29

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