EP0702158A2 - Dispositif pour un circuit hydraulique - Google Patents

Dispositif pour un circuit hydraulique Download PDF

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Publication number
EP0702158A2
EP0702158A2 EP95113856A EP95113856A EP0702158A2 EP 0702158 A2 EP0702158 A2 EP 0702158A2 EP 95113856 A EP95113856 A EP 95113856A EP 95113856 A EP95113856 A EP 95113856A EP 0702158 A2 EP0702158 A2 EP 0702158A2
Authority
EP
European Patent Office
Prior art keywords
hydraulic circuit
spring
housing
gas
sabot
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.)
Withdrawn
Application number
EP95113856A
Other languages
German (de)
English (en)
Other versions
EP0702158A3 (fr
Inventor
Peter Dipl.-Ing. Dr. Lell
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.)
Airbus Defence and Space GmbH
Original Assignee
Daimler Benz Aerospace AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daimler Benz Aerospace AG filed Critical Daimler Benz Aerospace AG
Publication of EP0702158A2 publication Critical patent/EP0702158A2/fr
Publication of EP0702158A3 publication Critical patent/EP0702158A3/fr
Withdrawn legal-status Critical Current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
    • F15B15/19—Pyrotechnical actuators

Definitions

  • the invention relates to a device that pressurizes a hydraulic circuit.
  • a pyrotechnic gas generator in which a high-pressure housing accommodating a compressed gas-generating capsule is surrounded by a medium-pressure housing.
  • the area of the outlet openings from the medium pressure housing is considerably larger than the surface area of the outlet opening from the high pressure housing into the medium pressure housing.
  • This gas generator is e.g. suitable for a pyrotechnic force element in which the gas emerging from the openings of the medium-pressure housing meets a piston which produces a pushing effect.
  • the invention has for its object to design a device of the type mentioned so that the hydraulic circuit is quickly and safely pressurized if necessary.
  • the main advantage of the invention is that the gas of the gas generator can be safely generated by the pyrotechnic device even after decades of storage without maintenance of the assembly. It is created in a fraction of a second and can therefore pressurize the hydraulic circuit via the sabot, the spring and the pressure stamp.
  • the spring guarantees that the pressure on the pressure stamp can be maintained for a short time.
  • the one-time pressure exerted by the device according to the invention is sufficient; in other systems in which the hydraulic circuit must be under pressure for a long time, the device bridges the time until an emergency unit has started and is fully operational.
  • the pyrotechnic gas generator of the device consists of a propellant charge located in a combustion chamber, which is ignited by means of ignition electronics with or without an igniter.
  • the ignition electronics are powered by a mains current or a battery.
  • the spring which maintains the gas pressure for a long time can be a spiral spring, plate spring or gas spring. All parts of the device are housed in a housing which is interchangeably inserted into a wall of the hydraulic circuit. Depending on the task, a screw, bayonet or sliding lock can be used. The interchangeability guarantees a quick restoration of functionality after using the device. Experience has shown that gas generators are reliable for many years and do not require any maintenance.
  • the single figure shows a schematic representation of a device 1 which is inserted into a wall 2 of a hydraulic tank.
  • a combustion chamber 4 with a propellant charge 4a, a sabot 5, a coil spring 6 and a pressure stamp 7 are accommodated in a housing 3.
  • the housing 3 is screwed with a thread 8 into a receiving bore 10 of the wall 2 provided with a thickening 9 and sealed by a collar 11 in which an O-ring 12 is inserted.
  • An ignition electronics 13 is attached to the housing 3.
  • the function of the device is as follows. After switching on the ignition electronics 13 with the aid of a mains current or a battery present in the ignition electronics 13, the propellant charge 4a is ignited. The resulting gas presses on the sabot 5, the pressure is transferred to the coil spring 6 and on the pressure stamp 7, which exerts the desired pressure on the hydraulic oil 2a located in a space 14 above the pressure stamp 7 and in the hydraulic tank 2. The maximum stroke of the sabot 5 is limited by a lock 15 and that of the plunger 7 by a collar 16. The spring 6 maintains the pressure on the hydraulic oil. If the combustion chamber 4 with the propellant charge 4a is enclosed in a manner not shown by a metallic bellows, the developed propellant gases are hermetically sealed, so that no propellant gas molecules can escape to the outside.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Air Bags (AREA)
  • Emergency Lowering Means (AREA)
EP95113856A 1994-09-17 1995-09-04 Dispositif pour un circuit hydraulique Withdrawn EP0702158A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4433212 1994-09-17
DE4433212A DE4433212C1 (de) 1994-09-17 1994-09-17 Vorrichtung für Hydraulikkreis

Publications (2)

Publication Number Publication Date
EP0702158A2 true EP0702158A2 (fr) 1996-03-20
EP0702158A3 EP0702158A3 (fr) 1996-08-14

Family

ID=6528509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95113856A Withdrawn EP0702158A3 (fr) 1994-09-17 1995-09-04 Dispositif pour un circuit hydraulique

Country Status (4)

Country Link
US (1) US5582010A (fr)
EP (1) EP0702158A3 (fr)
CA (1) CA2158398A1 (fr)
DE (1) DE4433212C1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7182191B2 (en) * 2002-07-11 2007-02-27 Autoliv Asp, Inc. Motion damper
US6764118B2 (en) 2002-09-11 2004-07-20 Autoliv Asp, Inc. Active bumper assembly
US6942261B2 (en) 2003-08-14 2005-09-13 Autoliv Asp, Inc. Linear actuator with an internal dampening mechanism
DE102005042364A1 (de) * 2005-09-07 2007-03-15 Zf Friedrichshafen Ag Sicherheitsvorrichtung für ein Druckmittelsystem und Verfahren für seine Anwendung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3937032A1 (de) 1989-11-07 1991-05-08 Dynamit Nobel Ag Pyrotechnischer gasgenerator

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2509942A (en) * 1944-11-02 1950-05-30 Bendix Westinghouse Automotive Fluid pressure system with automatic means for replenishing pressure
US2674852A (en) * 1947-09-30 1954-04-13 Olman Peter Michael Emergency pressure applicator
US2912902A (en) * 1958-06-20 1959-11-17 Thomas G Nessler Explosive powered bomb release unit
US3031845A (en) * 1959-10-09 1962-05-01 Ling Temco Vought Inc Hydraulic system
US3199288A (en) * 1963-03-20 1965-08-10 Joseph A Nahas Explosively actuated piston driver
US4091621A (en) * 1975-06-02 1978-05-30 Networks Electronic Corp. Pyrotechnic piston actuator
DE2961362D1 (en) * 1978-09-18 1982-01-21 Sperry Ltd Fluid supply systems
FR2685741A1 (fr) * 1991-12-31 1993-07-02 Thomson Brandt Armements Verin pyrotechnique a course amortie.
DE4330216C2 (de) * 1993-09-07 1995-08-17 Daimler Benz Aerospace Ag Transportable Berge- und Notausrüstung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3937032A1 (de) 1989-11-07 1991-05-08 Dynamit Nobel Ag Pyrotechnischer gasgenerator

Also Published As

Publication number Publication date
EP0702158A3 (fr) 1996-08-14
US5582010A (en) 1996-12-10
CA2158398A1 (fr) 1996-03-18
DE4433212C1 (de) 1996-01-25

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