EP0284482B1 - Differentialhydraulischer Kraftzylinder zur Steuerung von Leistungsschaltern - Google Patents

Differentialhydraulischer Kraftzylinder zur Steuerung von Leistungsschaltern Download PDF

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Publication number
EP0284482B1
EP0284482B1 EP88400574A EP88400574A EP0284482B1 EP 0284482 B1 EP0284482 B1 EP 0284482B1 EP 88400574 A EP88400574 A EP 88400574A EP 88400574 A EP88400574 A EP 88400574A EP 0284482 B1 EP0284482 B1 EP 0284482B1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
valve
jack
jack 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.)
Expired - Lifetime
Application number
EP88400574A
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English (en)
French (fr)
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EP0284482A1 (de
Inventor
Claude Alain Gratzmuller
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Individual
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Individual
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Publication date
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Priority to AT88400574T priority Critical patent/ATE71471T1/de
Publication of EP0284482A1 publication Critical patent/EP0284482A1/de
Application granted granted Critical
Publication of EP0284482B1 publication Critical patent/EP0284482B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • 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

Definitions

  • differential cylinders for this application, presents constructive difficulties, in particular because they must guarantee a permanent and absolute tightness, for very long periods, despite the very high hydraulic operating pressures P, of the order of 300 to 400 bar and high speeds of the order of 10 to 15 meters / second.
  • These jacks must therefore include at least, as shown in the aforementioned prior patent, a first seal at the passage of the outgoing rod through the bottom of the cylinder and a second seal on the piston.
  • the object of the present invention is to remedy the drawbacks of differential hydraulic cylinders known up to now and to allow much simpler and economical construction while ensuring even better reliability thanks to the reduction in the number of components.
  • this arrangement of the piston devoid of packing provides other important advantages, in particular the possibility of producing the cylinder in the form of a foundry piece requiring only simple machining, which would be incompatible. with a piston seal. Furthermore, it is possible to bring directly from the foundry the transfer channel of large section between the main chamber and the annular chamber of the jack, which considerably reduces the number of constituent parts of the jack.
  • This command comprises a differential cylinder 2 comprising a cylinder 4, a piston 6, an outgoing piston rod 8 which is coupled to the movable contact 10 of a circuit breaker to establish or cut the circuit between the fixed contacts 12-12 ′ of the circuit breaker.
  • the position shown in Figure 1 is the tripped position of the circuit breaker (open contacts), in which the piston 6 is close to its low position in the cylinder.
  • Triggering is obtained by placing the valve 24 in the purge position (position in Figure 1).
  • Known differential cylinders such as that shown in FIG. 1, include a seal 30 on the passage of the outgoing rod 8 through the bottom 32 of the cylinder and, also, a seal 34 on the piston 6 to ensure the seal between the piston and the interior surface of the cylinder 4.
  • This seal has been shown in the known form of a spring seal of the kind shown in FIG. 2 of the aforementioned prior patent and it must ensure the permanent seal of the chamber 14, under the pressure of approximately 300 to 400 bar, in the triggered position shown.
  • valve 42 can be tightly fitted to a frustoconical valve seat 44 formed, on the edge of the orifice 28, in the screwed bottom 46 of the cylinder.
  • valve seat 44 may consist of an insert, of material of hardness suitable for that of the valve, in the bottom of the cylinder 46.
  • the pipe 16 which is connected to the orifice 64 opening into the annular chamber 14 of the cylinder 4, must be a pipe of large section to allow rapid transfer of the between the two chambers 14 and 20.

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  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Actuator (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Retarders (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Control Of Fluid Gearings (AREA)
  • Vehicle Body Suspensions (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Reciprocating Pumps (AREA)
  • Lift Valve (AREA)
  • Fluid-Driven Valves (AREA)

Claims (10)

1. Hydraulisches Differential-Stellglied zur Öl-Druckluft-Steuerung eines elektrischen Unterbrechungsschalters, mit einem Zylinder (4), einem Kolben (6) und einer herausführenden Kolbenstange (8), die im Zylinder eine Ringkammer (14) auf der einen Seite des Kolbens sowie eine Hauptkammer (20) auf der anderen Seite des Kolbens bilden, wobei die herausführende Stange (8) mit dem beweglichen Kontakt (10) des Unterbrechungsschalters gekoppelt ist und die Ringkammer (14) ständig an eine Quelle (18) für hydraulisches Hochdruck-Strömungsmittel angeschlossen ist sowie die Hauptkammer (20) am entsprechenden Zylinderboden (46) eine Einspeisungs-/Ablaßöffnung (28) der genannten Kammer (20) aufweist, dadurch gekennzeichnet, daß
― die äußere zylindrische Fläche (36) des Kolbens (6) im wesentlichen in unmittelbarer und nichtabgedichteter Metall-auf-Metall-Gleitberührung mit der Innenoberfläche (38) des Zylinders (4) steht, wobei der Kolben zum Zylinder hin keine Dichtungsanordnung aufweist,
― der Kolben mechanisch einer Ventilklappe (42) zugeordnet ist, die die Abdichtung der oben genannten Öffnung (28) am Ende der Rücklaufbewegung des Kolbens (6) zum oben genannten Boden (46) des Zylinders sicherstellt, und
― der Körper des Zylinders (4) als Gußteil ausgeführt ist.
2. Hydraulisches Stellglied nach Anspruch 1, dadurch gekennzeichnet, daß das Gußteil, das den Zylinderkörper bildet, in gleicher Weise eingegossen einen Übertragungskanal (16′) mit großem Querschnitt aufweist, der in die Ringkammer (14) des Stellgliedes einmündet.
3. Stellglied nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Innenoberfläche (38) des gegossenen Zylinderblocks (4) ohne Schleif- oder Poliervorgang nur einfach bearbeitet ist.
4. Stellglied nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Oberfläche S₂ der Ventilklappe (42) in einer Größenordnung liegt, daß sie um 50% größer ist als der Schnitt s der Stange (8) des Kolbens (6).
5. Stellglied nach jedem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Ventilklappe (42-48-52) vom Kolben (6) getragen ist und nach unten über die Hauptfläche des Kolbens übersteht, die der Hauptkammer (20) zugewandt ist.
6. Stellglied nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Ventilklappe (42-52) einstückig mit dem Kolben (6) ausgebildet ist.
7. Stellglied nach jedem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Ventilklappe (42-48-52) mit einem Sitz zusammenwirkt, der im Boden (46) des Zylinders rund um den Rand der Einspeisungs-/Ablaßöffnung (28) vorgesehen ist, wobei der Sitz einen Endanschlag für den Hub des Kolbens (6) bildet.
8. Klappenventil nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Ventilklappe (42) eine kegelstumpfförmige Ventilklappe ist, die mit einem kegelstumpfförmigen Sitz (44) zusammenwirkt.
9. Stellglied nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Ventilklappe (48) ein vom Kolben getrenntes Teil ist und in einer Aufnahme (58) gehalten ist, die in den Kolben eingebracht ist.
10. Stellglied nach Anspruch 9, dadurch gekennzeichnet, daß elastische Mittel (62) zwischen der Vemtilklappe (48) und dem Kolben (6) angeordnet sind.
EP88400574A 1987-03-25 1988-03-11 Differentialhydraulischer Kraftzylinder zur Steuerung von Leistungsschaltern Expired - Lifetime EP0284482B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88400574T ATE71471T1 (de) 1987-03-25 1988-03-11 Differentialhydraulischer kraftzylinder zur steuerung von leistungsschaltern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8704134A FR2613122B1 (fr) 1987-03-25 1987-03-25 Verin hydraulique differentiel pour la commande de disjoncteurs electriques
FR8704134 1987-03-25

Publications (2)

Publication Number Publication Date
EP0284482A1 EP0284482A1 (de) 1988-09-28
EP0284482B1 true EP0284482B1 (de) 1992-01-08

Family

ID=9349407

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88400574A Expired - Lifetime EP0284482B1 (de) 1987-03-25 1988-03-11 Differentialhydraulischer Kraftzylinder zur Steuerung von Leistungsschaltern

Country Status (17)

Country Link
EP (1) EP0284482B1 (de)
JP (1) JP2593909B2 (de)
KR (1) KR920006522B1 (de)
CN (1) CN1008652B (de)
AT (1) ATE71471T1 (de)
AU (1) AU599217B2 (de)
BR (1) BR8801365A (de)
CA (1) CA1319728C (de)
DE (1) DE3867514D1 (de)
ES (1) ES2028314T3 (de)
FI (1) FI881400A7 (de)
FR (1) FR2613122B1 (de)
HU (1) HU204328B (de)
IN (1) IN170378B (de)
SU (1) SU1644724A3 (de)
YU (1) YU47464B (de)
ZA (1) ZA881688B (de)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1070266B (de) * 1958-06-04
FR1312751A (fr) * 1961-01-24 1962-12-21 Coq Nv Perfectionnements apportés aux interrupteurs électriques avec rupture pneumatique du courant
US3155009A (en) * 1961-08-03 1964-11-03 Gen Dynamics Corp High energy actuator apparatus
FR1378068A (fr) * 1963-07-24 1964-11-13 Merlin Gerin Perfectionnement aux dispositifs de commande hydraulique, notamment pour interrupteurs électriques
DE1282131B (de) * 1965-01-29 1968-11-07 Siemens Ag Elektrischer Schalter
FR2317532A1 (fr) * 1975-07-07 1977-02-04 Gratzmuller Jean Louis Verin hydraulique a amortisseur incorpore avec realimentation de la chambre d'amortissement
US4166937A (en) * 1978-05-18 1979-09-04 General Electric Company Hydraulically-activated operating system for an electric circuit breaker
JPS5598464U (de) * 1978-12-27 1980-07-09
JPS5693227A (en) * 1979-12-27 1981-07-28 Hitachi Ltd Hydraulic driving unit
JPS56153627A (en) * 1980-04-28 1981-11-27 Meidensha Electric Mfg Co Ltd Oil pressure operating device
JPS59109044U (ja) * 1983-01-12 1984-07-23 株式会社東芝 しや断器の液圧操作装置
JPS61161627A (ja) * 1985-01-08 1986-07-22 三菱電機株式会社 液圧式操作装置
JPH0795416B2 (ja) * 1986-02-26 1995-10-11 株式会社東芝 液圧操作装置
US4785712A (en) * 1986-05-27 1988-11-22 Mitsubishi Denki Kabushiki Kaisha Hydraulic operating apparatus for electric circuit breaker

Also Published As

Publication number Publication date
YU55288A (en) 1990-04-30
EP0284482A1 (de) 1988-09-28
HU204328B (en) 1991-12-30
AU1351588A (en) 1988-09-29
FI881400A0 (fi) 1988-03-24
CA1319728C (en) 1993-06-29
JPS63254623A (ja) 1988-10-21
AU599217B2 (en) 1990-07-12
KR880011481A (ko) 1988-10-28
CN88101589A (zh) 1988-10-12
DE3867514D1 (de) 1992-02-20
SU1644724A3 (ru) 1991-04-23
BR8801365A (pt) 1988-11-01
HUT48331A (en) 1989-05-29
ES2028314T3 (es) 1992-07-01
JP2593909B2 (ja) 1997-03-26
FI881400L (fi) 1988-09-26
IN170378B (de) 1992-03-21
CN1008652B (zh) 1990-07-04
ZA881688B (en) 1988-09-06
FI881400A7 (fi) 1988-09-26
YU47464B (sh) 1995-10-03
KR920006522B1 (ko) 1992-08-07
FR2613122A1 (fr) 1988-09-30
FR2613122B1 (fr) 1989-06-23
ATE71471T1 (de) 1992-01-15

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