EP0550321A1 - Pyrotechnischen Stellkolben mit gedämpften Hub - Google Patents

Pyrotechnischen Stellkolben mit gedämpften Hub Download PDF

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Publication number
EP0550321A1
EP0550321A1 EP92403492A EP92403492A EP0550321A1 EP 0550321 A1 EP0550321 A1 EP 0550321A1 EP 92403492 A EP92403492 A EP 92403492A EP 92403492 A EP92403492 A EP 92403492A EP 0550321 A1 EP0550321 A1 EP 0550321A1
Authority
EP
European Patent Office
Prior art keywords
piston
chamber
cylinder according
hole
combustion chamber
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Withdrawn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
EP92403492A
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English (en)
French (fr)
Inventor
Jean-Pierre Thomson-Csf Frehaut
Daniel Thomson-Csf Wisshaupt
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.)
Thomson Brandt Armements SA
Original Assignee
Thomson Brandt Armements SA
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 Thomson Brandt Armements SA filed Critical Thomson Brandt Armements SA
Publication of EP0550321A1 publication Critical patent/EP0550321A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/006—Explosive bolts; Explosive actuators
    • 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
    • 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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke

Definitions

  • the present invention relates to a pyrotechnic cylinder with damped stroke.
  • the object of the invention is to overcome the aforementioned drawbacks.
  • the invention relates to a pyrotechnic cylinder having a body comprising a piston, a combustion chamber of pyrotechnic materials and a back-pressure chamber between the head of the piston and the end of the jack, characterized in that it further comprises an intermediate compression chamber between the combustion chamber and the head of the piston , the intermediate combustion chamber being connected to the combustion chamber by a hole.
  • the main advantages of the invention are that it makes it possible to dampen the speed of movement of the piston of the jack while ensuring a driving force of the piston until it reaches the stop, that it suppresses the rebounds of the piston, finally that it is simple to implement.
  • FIG. 1a shows a block diagram of a pyrotechnic cylinder according to the prior art.
  • the cylinder consists of a main body 1, a combustion chamber 2 at high pressure. This chamber 2 is further delimited by the end or head 6 of the piston 5 of the jack. As soon as pyrotechnic materials are burned in the combustion chamber 2, the pressure in this chamber increases very quickly, develops a force greater than the resistance force F of the piston and gives it a speed of movement which increases very quickly.
  • FIG. 1b presents types of changes, generally observed from the pressure P in the combustion chamber 2 and from the speed V of the piston 5 as a function of the time t from an initial instant to.
  • the combustion of pyrotechnic materials in the chamber 2 for a very short time for reasons of regularity of combustion the pressure P inside the combustion chamber 2 decreases very quickly while the speed V of the piston 5 increases very quickly, if the initial motive force created by the combustion gases has been sufficiently powerful.
  • the speed V of the piston 5 increases rapidly but decreases just as rapidly, due to the fall in the pressure P, and the resistance force F of the piston 5 to such an extent that the piston 5 doesn’t does not reach the stop position and can therefore not be locked in this position by appropriate means. This in particular prevents organs controlled by the piston of the jack from acquiring equilibrium positions.
  • Figure 2 shows a block diagram of a cylinder according to the invention.
  • the cylinder always consists of a body 1, a combustion chamber 2, and a piston 5, but it further comprises an intermediate compression chamber 3 interposed between the combustion chamber 2 and the head 6 of the piston .
  • the intermediate compression chamber 3 is connected to the combustion chamber 2 by a hole 4.
  • This hole can be of the nozzle or nozzle type.
  • the neck can be calculated so as to make it sonic, that is to say so that the speed of the gases passing through it is equal to the speed of sound.
  • the part 9 of the jack between the head 6 of the piston 5 and the end 10 of the jack opposite to the combustion chamber 2 constitutes a back-pressure chamber.
  • a seal is provided between the intermediate compression chamber 3 and the back-pressure chamber 9.
  • This seal can for example be obtained by covering the edges of the head 6 of the piston with a strip of rubber or of elastomeric material.
  • the role of the compression chamber intermediate 3 is to avoid brutally applying a large driving force to the piston.
  • the nozzle 4 creates a delay time for the arrival of the gases in the intermediate compression chamber 3 which is in contact with the piston 5.
  • the nozzle 4 is calculated so that, taking into account the movement of the piston the pressure peak in the intermediate compression chamber 3 is less important than in the case of the jack shown in FIG. 1a.
  • the piston 5 is subjected, via its head 6, on the one hand to a force exerted by the substantially constant pressure inside the intermediate compression chamber 3 and on the other hand to a force of opposite direction exerted by the increasing pressure with the displacement of the jack of the back-pressure chamber 9. These two forces give the piston 5 a substantially constant displacement speed, damping its stroke compared to the case in particular of FIG. 1a.
  • control of the piston movement speed is increased for example by regulating the pressure in the back pressure chamber 9 during the stroke of the jack thanks to a gas passage 20 between the compression chamber 3 and the chamber 9 bypassing the sealed head 6 of the piston.
  • This passage 20 can be a pipe connecting the two chambers or preferably a simple groove in the wall of the body 1 which neutralizes the seal of the head 6 of the piston.
  • the cross-section of the passage is adjusted to control the speed of the piston throughout its stroke and can be variable depending on the position of the piston.
  • the end of the passage 20 is at a certain distance from the partition between the intermediate chamber 3 and the combustion chamber so that the gas passage is inoperative at the start of the displacement of the piston so as not to hinder the speed setting.
  • the gas passage 20 is interrupted before the end 10 of the jack so as to isolate the chamber 3 again at the end of the stroke.
  • the back-pressure chamber 9 is not absolutely sealed at the bottom 10 of the jack in order to ensure by emptying at the end of the stroke, after closing the passage 20, a frank abutment at low speed but under the action of 'a significant pressure in the chamber 3.
  • the leak 12 can be achieved at the passage of the rod 5 of the piston through the bottom 10 or by a nozzle in the bottom 10 or in the end of the body 1 in the vicinity of the bottom 10, according to the need to control the orientation of the gases emitted. It should be noted that the quantity of gas discharged is small, the chamber 3 remaining sealed at the end of the stroke of the piston 5.
  • FIG. 3 represents another possible embodiment of the pyrotechnic cylinder according to the invention.
  • This comprises several intermediate compression chambers 3, 31 of the type of the first intermediate compression chamber 3 and a back pressure chamber 9.
  • the intermediate chambers 3, 31 are formed for example, using a pull-out piston 5 and using decreasing sections in stages 33, 34 of the body 1 of the jack. These bearings 33, 34 are intended to successively stop each part 61, 62 of the pull-out piston 5. After stopping, these parts 61, 62 of decreasing sections form lids successively separating the first intermediate chamber 3 from the second intermediate chamber 31, then the second intermediate chamber 31 of the back pressure chamber 9.
  • a hole 41 of the hole 4 type between the combustion chamber 2 and the first intermediate chamber 3 is formed in the part 61 separating the first intermediate chamber 3 from the second intermediate chamber 31, then allowing the setting under pressure in the latter.
  • This last embodiment includes two intermediate chambers 3, 31, however, it is possible to increase this number, the operating principle then being similar to that described in FIG. 3.
  • the combustion of pyrotechnic materials inside the combustion chamber 2 can be started for example by an igniter controllable by an electrical signal.
  • the jack comprises locking means, not shown, to hold the piston 5 in abutment according to solutions known to those skilled in the art, for example a finger engaging the piston when the latter reaches its end. race.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Actuator (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
EP92403492A 1991-12-31 1992-12-21 Pyrotechnischen Stellkolben mit gedämpften Hub Withdrawn EP0550321A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9116385A FR2685741A1 (fr) 1991-12-31 1991-12-31 Verin pyrotechnique a course amortie.
FR9116385 1991-12-31

Publications (1)

Publication Number Publication Date
EP0550321A1 true EP0550321A1 (de) 1993-07-07

Family

ID=9420706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92403492A Withdrawn EP0550321A1 (de) 1991-12-31 1992-12-21 Pyrotechnischen Stellkolben mit gedämpften Hub

Country Status (3)

Country Link
US (1) US5303631A (de)
EP (1) EP0550321A1 (de)
FR (1) FR2685741A1 (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1138957A1 (de) * 2000-03-29 2001-10-04 Pyroalliance Schockarmer, wiederaufladbarer Trennbolzen
FR2845446A1 (fr) 2002-10-04 2004-04-09 Pyroalliance Dispositif d'absorption d'energie pour colonne de direction
EP1486697A1 (de) 2003-06-13 2004-12-15 Pyroalliance Modulierbarer Dämpfer mit pyrotechnischen Gasen
EP1495918A2 (de) * 2003-07-10 2005-01-12 Pyroalliance Stossabsorbierende Vorrichtung eines Fahrzeugteils mit einem Metallfaden
EP1496268A1 (de) * 2003-07-10 2005-01-12 Pyroalliance Pyrotechnischer Stellantrieb mit variabler Schubkraft
FR2875293A1 (fr) 2004-09-14 2006-03-17 Pyroalliance Sa Actionneur hybride muni d'une charge comprenant un oxydant et un reducteur dissocies
EP1705383A2 (de) 2005-03-24 2006-09-27 SNPE Matériaux Energétiques Pyrotechnischer Aktor mit Druckregelorgan
EP1795405A2 (de) * 2005-12-08 2007-06-13 Bayerische Motoren Werke Aktiengesellschaft Anordnung einer Frontklappe an einem Fahrzeug
US7568341B2 (en) 2004-10-07 2009-08-04 Snpe Materiaux Energetiques Pyrotechnic actuator with controllable force and optimised geometry
WO2011157940A1 (fr) 2010-06-15 2011-12-22 Sme Verin a course declenchee muni d'un dispositif d'evacuation des gaz
WO2013174121A1 (zh) * 2012-05-23 2013-11-28 中联重科股份有限公司 液压缸缓冲控制方法、缓冲式液压缸控制系统及液压设备
FR3005725A1 (fr) * 2013-05-17 2014-11-21 Herakles Generateur de gaz pyrotechnique

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DE4433212C1 (de) * 1994-09-17 1996-01-25 Daimler Benz Aerospace Ag Vorrichtung für Hydraulikkreis
US6318228B1 (en) * 1997-04-24 2001-11-20 Ramtech 2000, L.L.C. Forcible entry device
AT405729B (de) * 1998-06-16 1999-11-25 Hirtenberger Praezisionstechni Verzögerungselement für pyrotechnische ladungen
US6532739B2 (en) 1999-08-25 2003-03-18 Takata Corporation Pretensioner
JP3943295B2 (ja) * 1999-08-25 2007-07-11 タカタ株式会社 プリテンショナ及びそれを有するシートベルト装置
US6631668B1 (en) 2000-11-10 2003-10-14 David Wilson Recoilless impact device
US6672194B2 (en) 2001-07-19 2004-01-06 Textron Systems Corporation Energetic-based actuator device with rotary piston
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
US6922153B2 (en) * 2003-05-13 2005-07-26 Credo Technology Corporation Safety detection and protection system for power tools
US6942261B2 (en) 2003-08-14 2005-09-13 Autoliv Asp, Inc. Linear actuator with an internal dampening mechanism
FR2864021B1 (fr) * 2003-12-19 2006-05-26 Lacroix Soc E Dispositif de commande a deplacement d'un element de fermeture pour vehicule
US20050155449A1 (en) * 2004-01-21 2005-07-21 Greg Birchmeier Steering wheel damper
US7303040B2 (en) * 2004-05-18 2007-12-04 Autolive Asp, Inc. Active vehicle hood system and method
EP1771664A2 (de) * 2004-07-23 2007-04-11 Delphi Technologies, Inc. Pyrotechnischer aktor
DE102005051657A1 (de) * 2005-10-28 2007-05-03 GM Global Technology Operations, Inc., Detroit Pyrotechnischer Aktuator
GB2432399A (en) * 2005-11-18 2007-05-23 Autoliv Dev Piston and cylinder pyrotechnic actuator
JP5239253B2 (ja) * 2007-08-14 2013-07-17 日産自動車株式会社 フード跳ね上げ装置
EP2303890A4 (de) * 2008-06-19 2012-04-11 Progenics Pharm Inc Inhibitoren von phosphatidylinosit-3-kinase
EP2290245A1 (de) 2009-08-27 2011-03-02 WOW Company Auslöser mit Zählunterdrückungsmitteln und Vorkomprimierungsmitteln
DE102010033438B4 (de) * 2010-08-04 2013-10-31 Dominic Becker Absperrarmatur
US8534174B2 (en) 2010-09-27 2013-09-17 Power Tool Institute Pyrotechnic actuator and power cutting tool with safety reaction system having such pyrotechnic actuator
DE102011106513A1 (de) * 2011-06-15 2012-12-20 Trw Airbag Systems Gmbh Pyrotechnischer Aktuator mit Entlüftung
DE102011107543A1 (de) 2011-07-15 2013-01-17 Bayern-Chemie Gesellschaft Für Flugchemische Antriebe Mbh Gedämpfter pyrotechnischer Aktuator
FR3042237B1 (fr) * 2015-10-09 2017-11-03 Labinal Power Systems Dispositif d'actionnement pour systeme d'eolienne de secours d'aeronef
US11512645B2 (en) * 2020-03-06 2022-11-29 Goodrich Corporation Solid-propellant gas generator assemblies and methods

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GB809031A (en) * 1954-11-26 1959-02-18 Gen Electric Improvements in apparatus for generating gaseous working fluid
US2892452A (en) * 1957-05-08 1959-06-30 Weinstock Manuel Load sensitive-gas operated thruster
US3118349A (en) * 1964-01-21 Actuator cylinder
FR1582177A (de) * 1968-07-11 1969-09-26
US4054032A (en) * 1976-09-03 1977-10-18 Networks Electronic Corporation Explosive actuated pin puller
US4237690A (en) * 1978-08-25 1980-12-09 Nippon Soken, Inc. Piston return stop device for seat belt tensioning device
FR2489898A1 (fr) * 1980-09-11 1982-03-12 Repa Feinstanzwerk Gmbh Dispositif d'entrainement pyrotechnique notamment pour le tendeur de rappel d'un systeme de ceinture de securite
US4412420A (en) * 1980-07-03 1983-11-01 Networks Electronics Corp. Explosive actuated pin puller
DE3717458A1 (de) * 1987-05-23 1988-12-01 Diehl Gmbh & Co Pyrotechnisches kraftelement

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US3149456A (en) * 1963-08-16 1964-09-22 Charles S Sterrett Gas damped thruster
US4034816A (en) * 1976-05-04 1977-07-12 Lutich Louis L Demolition tool
US4037821A (en) * 1976-08-10 1977-07-26 The United States Of America As Represented By The Secretary Of The Army Telescoping retractor
US4753151A (en) * 1986-06-27 1988-06-28 Lockheed Corporation Self-retracting ballistic actuator system

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Publication number Priority date Publication date Assignee Title
US3118349A (en) * 1964-01-21 Actuator cylinder
GB809031A (en) * 1954-11-26 1959-02-18 Gen Electric Improvements in apparatus for generating gaseous working fluid
US2892452A (en) * 1957-05-08 1959-06-30 Weinstock Manuel Load sensitive-gas operated thruster
FR1582177A (de) * 1968-07-11 1969-09-26
US4054032A (en) * 1976-09-03 1977-10-18 Networks Electronic Corporation Explosive actuated pin puller
US4237690A (en) * 1978-08-25 1980-12-09 Nippon Soken, Inc. Piston return stop device for seat belt tensioning device
US4412420A (en) * 1980-07-03 1983-11-01 Networks Electronics Corp. Explosive actuated pin puller
FR2489898A1 (fr) * 1980-09-11 1982-03-12 Repa Feinstanzwerk Gmbh Dispositif d'entrainement pyrotechnique notamment pour le tendeur de rappel d'un systeme de ceinture de securite
DE3717458A1 (de) * 1987-05-23 1988-12-01 Diehl Gmbh & Co Pyrotechnisches kraftelement

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2807123A1 (fr) * 2000-03-29 2001-10-05 Pyroalliance Ecrou de separation rearmable a faible niveau de choc induit
EP1138957A1 (de) * 2000-03-29 2001-10-04 Pyroalliance Schockarmer, wiederaufladbarer Trennbolzen
FR2845446A1 (fr) 2002-10-04 2004-04-09 Pyroalliance Dispositif d'absorption d'energie pour colonne de direction
DE10346031B4 (de) * 2002-10-04 2006-06-08 Pyroalliance Energie aufnehmende Vorrichtung, insbesondere für Lenksäulen
US6959548B2 (en) 2003-06-13 2005-11-01 Pyroalliance Adjustable pyrotechnic-gas shock absorber
EP1486697A1 (de) 2003-06-13 2004-12-15 Pyroalliance Modulierbarer Dämpfer mit pyrotechnischen Gasen
FR2856125A1 (fr) 2003-06-13 2004-12-17 Pyroalliance Amortisseur modulable a gaz pyrotechniques
EP1496268A1 (de) * 2003-07-10 2005-01-12 Pyroalliance Pyrotechnischer Stellantrieb mit variabler Schubkraft
FR2857421A1 (fr) * 2003-07-10 2005-01-14 Pyroalliance Actionneur pyrotechnique a effet de poussee variable
EP1495918A3 (de) * 2003-07-10 2005-03-16 Pyroalliance Stossabsorbierende Vorrichtung eines Fahrzeugteils mit einem Metallfaden
FR2857313A1 (fr) * 2003-07-10 2005-01-14 Pyroalliance Dispositif d'amortissement du deplacement d'une piece impliquant un fil metallique
US7296504B2 (en) 2003-07-10 2007-11-20 Snpe Materiaux Energetiques Pyrotechnic actuator of the variable-thrust-acting type
EP1495918A2 (de) * 2003-07-10 2005-01-12 Pyroalliance Stossabsorbierende Vorrichtung eines Fahrzeugteils mit einem Metallfaden
FR2875293A1 (fr) 2004-09-14 2006-03-17 Pyroalliance Sa Actionneur hybride muni d'une charge comprenant un oxydant et un reducteur dissocies
EP1637511A2 (de) 2004-09-14 2006-03-22 Pyroalliance Pyrotechnischer Aktuator mit einer Ladung enthaltend ein Oxidationsmittel und ein dissoziiertes Reduktionsmittel
US7568341B2 (en) 2004-10-07 2009-08-04 Snpe Materiaux Energetiques Pyrotechnic actuator with controllable force and optimised geometry
FR2883606A1 (fr) * 2005-03-24 2006-09-29 Snpe Materiaux Energetiques Sa Actionneur pyrotechnique muni d'un organe regulateur de pression
US7475542B2 (en) 2005-03-24 2009-01-13 Snpe Materiaux Energeriques Pyrotechnic actuator furnished with a pressure regulator member
EP1705383A3 (de) * 2005-03-24 2009-05-13 SNPE Matériaux Energétiques Pyrotechnischer Aktor mit Druckregelorgan
EP1705383A2 (de) 2005-03-24 2006-09-27 SNPE Matériaux Energétiques Pyrotechnischer Aktor mit Druckregelorgan
EP1795405A2 (de) * 2005-12-08 2007-06-13 Bayerische Motoren Werke Aktiengesellschaft Anordnung einer Frontklappe an einem Fahrzeug
EP1795405A3 (de) * 2005-12-08 2007-08-22 Bayerische Motoren Werke Aktiengesellschaft Anordnung einer Frontklappe an einem Fahrzeug
WO2011157940A1 (fr) 2010-06-15 2011-12-22 Sme Verin a course declenchee muni d'un dispositif d'evacuation des gaz
US9470250B2 (en) 2010-06-15 2016-10-18 Herakles Triggered-stroke actuator fitted with a gas evacuation device
WO2013174121A1 (zh) * 2012-05-23 2013-11-28 中联重科股份有限公司 液压缸缓冲控制方法、缓冲式液压缸控制系统及液压设备
FR3005725A1 (fr) * 2013-05-17 2014-11-21 Herakles Generateur de gaz pyrotechnique
FR3005724A1 (fr) * 2013-05-17 2014-11-21 Herakles Generateur de gaz pyrotechnique
WO2014184505A3 (fr) * 2013-05-17 2015-06-04 Herakles Generateur de gaz pyrotechnique
US10072912B2 (en) 2013-05-17 2018-09-11 Arianegroup Sas Pyrotechnical gas generator
DE112014002455B4 (de) 2013-05-17 2024-05-02 Arianegroup Sas Pyrotechnischer Gasgenerator

Also Published As

Publication number Publication date
FR2685741A1 (fr) 1993-07-02
US5303631A (en) 1994-04-19
FR2685741B1 (de) 1995-04-07

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