EP1004843A1 - Dispositif de régulation de la vitesse de rentrée en batterie d'un canon d'artillerie en fonction de la température - Google Patents
Dispositif de régulation de la vitesse de rentrée en batterie d'un canon d'artillerie en fonction de la température Download PDFInfo
- Publication number
- EP1004843A1 EP1004843A1 EP99402752A EP99402752A EP1004843A1 EP 1004843 A1 EP1004843 A1 EP 1004843A1 EP 99402752 A EP99402752 A EP 99402752A EP 99402752 A EP99402752 A EP 99402752A EP 1004843 A1 EP1004843 A1 EP 1004843A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shock
- oil
- channel
- temperature
- buffer
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A25/00—Gun mountings permitting recoil or return to battery, e.g. gun cradles; Barrel buffers or brakes
- F41A25/02—Fluid-operated systems
Definitions
- the technical field of the invention is that of links elastics for artillery cannon.
- the elastic link consists of a shooting brake and a recuperator.
- the firing brake is intended to brake and limit the recoil of the retracting mass after firing.
- the recuperator is responsible for storing part of the energy back and then return it to the receding mass for bring it back in battery, ready for a new shot.
- the receding mass When re-entering the battery, the receding mass is gradually braked at the end of the race, in order to avoid brutal contact with the lookout.
- This braking is generally provided by a shock buffer which penetrates inside a ring by laminating the oil located between the two parts.
- This braking device at the end of re-entry into battery generally part of the fire brake.
- the fire brake oil has a variable viscosity. At low temperatures, the viscosity increases, causing braking to slow down at the end reentry, therefore an increase in the time returned to the battery. This causes a slowdown in rates of fire from the artillery cannon which is very detrimental to the weapon system.
- the subject of the invention is a device for regulation of the speed of re-entry into battery of a gun temperature-dependent artillery, including a shock pad cooperating with a ring, so as to ensure progressive braking of the barrel at the end of reentry in battery by rolling the oil through a leakage section located between the stamp and the ring.
- This device is characterized in that it comprises at least one device for modulation comprising a thermosensitive element produced in a shape memory alloy, an element which deformation, an increase in the leakage cross-section when the temperature drops below a given threshold.
- the heat-sensitive element may be constituted by the ring and / or the shock pad.
- the element thermosensitive may be integral with the shock pad.
- the shock buffer may have an additional oil passage, the cross-section of which is modified by the modulation device moved by the action of the thermosensitive element.
- the passage additional oil may consist of at least one blind axial channel opening at the front of the shock buffer and by a blind radial channel made at a rear level of the shock buffer, the two channels communicating with each other.
- the modulation device may include a tube placed at inside the axial channel of the shock buffer, tube likely to block the radial channel under the action of the heat-sensitive element when the temperature exceeds the given threshold, the tube being moved axially in one direction by the action of the thermosensitive element and in the other direction by the action of a spring.
- the shock buffer may have a second axial channel opening at the end of the radial channel to ensure additional oil passage and the modulation device may include a rod axial placed inside the first axial channel, the rod being likely to block the radial channel under the action of the heat-sensitive element when the temperature exceeds the given threshold.
- the rod may include a groove of oil passage and can be moved axially in a sense by the action of the thermosensitive element and in the other sense by the action of a spring to bring the groove in front of the radial channel of the shock buffer.
- the rod may include a radial oil passage hole located at the channel radial of the shock pad and it can be moved angularly by the thermosensitive element.
- the device modulation will be able to include a shutter likely to block the front end of the axial channel of the shock buffer, flap angularly displaced by the heat-sensitive element.
- a firing brake 1 according to the prior art, comprises a piston 2 sliding at inside a cylinder 3.
- the latter has a cover 4 mounted integrally with the cylinder, and contains a fluid, usually oil.
- the piston 2 thus defines, inside the cylinder 3, a first annular chamber 5 and a second chamber 6. It has holes 7 and 8, a first axial bore cylindrical 9, followed by a second cylindrical bore 10, smaller diameter.
- the bore 10 receives a ring 14 integral with piston 2, the role of which will be explained below.
- the cylinder 3 can be secured to a fixed mount of the material (not shown), and the piston 2 secured to the receding mass (not shown), or vice versa, depending on the type of artillery equipment.
- a conical counter rod 11 is mounted integral with the cover 4 of cylinder 3.
- the largest diameter of the counter rod, located towards its end 12, is of dimension lower than the internal bore 9 of the piston 2, so oil can circulate freely between piston 2 and the counter rod 11, the smallest diameter being located at the level cover 4.
- a shock buffer 13 is mounted integral, for example by thread, from the end 12 of the counter rod 11.
- the oil contained in cylinder 3 is intended, in a first, to brake the relative movement piston / cylinder when the recoiling mass recedes.
- the braking intensity is a function of the geometry of the means of communication between the two chambers 5 and 6.
- the means of communication consists of the combination of orifices 7 and 8 of constant geometry and the counter rod 11 of variable diameter along its length.
- the counter rod 11 decreases the section of the orifice 7 of the piston 2, thus varying the oil passage section between the two chambers and therefore braking intensity.
- the shock buffer can be produced according to at least two concepts.
- the first concept is to make the slightly conical external profile of the tampom, the base of the cone being located on the side of the counter rod 11.
- the second concept is to realize one or more longitudinal grooves on the outside diameter of the pad. This or these grooves have a decreasing depth gradually towards the counter rod 11.
- Figure 2 shows a first embodiment a device for regulating the reentry speed in battery of a cannon according to the invention. It's a view partial of a firing brake at the level of the buffer 13, of the type from the one previously described in Figure 1.
- a slight clearance or leakage section 15 remains between the outer diameter 35 of the buffer 13 and the inner diameter 16 of the ring 14.
- the outer profile of the pad being for example slightly conical, according to a concept known from the prior art as explained further upstream in the text, the leakage section 15 is variable depending on the relative position of the buffer 13 and the ring 14.
- the fire brake oil may have a variable viscosity, which increases when the temperature drops.
- the shock pad is a thermosensitive element made of shape memory alloy.
- shape memory alloys allow realize mechanical elements which, after having undergone deformation, can return to their original shape as soon as their temperature reaches a certain level. This effect is not product only at a particular temperature which is chosen when defining the mechanical element.
- thermosensitive element object of the invention, is made of an alloy with two shape memory states reversible, i.e. it is capable of ensuring two different positions.
- the shock pad diameter will be larger at low temperature only at high temperature, which increases the leakage section when the viscosity of the oil is strong.
- the heat-sensitive element was subjected before its use to a so-called education process allowing it to occupy, depending on the temperature at which it finds subject, the two positions or states of form memorized mentioned above.
- the education process is based on the passage of the alloy of its austenitic type crystallographic phase at its martensitic type phase.
- the threshold temperature which corresponds to the temperature phase transition in the alloy will be easily defined by a person skilled in the art, depending on the conditions use of equipment, type of oil used and type alloy.
- the shape memory alloy shock pad can, for example example, being made up of an alloy from the group of compounds nickel-titanium, nickel-titanium-iron, nickel-aluminum, copper-zinc-aluminum or copper-aluminum-nickel.
- the outside diameter of the buffer 13 varies from the state of high temperature to the state of low temperature (and vice versa), causing a variation equivalent of the leakage section 15 which makes it possible to obtain a substantially stable reentry speed which whatever the temperature and therefore whatever the viscosity oil.
- the element thermosensitive could be ring 14, or both ring 14 and the shock pad 13.
- Figures 3 and 4 show a device for regulation of the speed of re-entry into battery of a gun according to a second embodiment of the invention.
- the shock pad 13 has an additional oil passage 30 whose cross section is modified by a modulation device 17.
- the modulation device 17 is composed of a tube 21 having an internal bore 22 of a heat-sensitive element tubular 20, a spring 26 and a plug 23.
- the tube 21 is positioned inside a blind axial channel 24 of the shock buffer 13.
- the axial channel 24 has two bearing surfaces 25 and 27 of different diameters and connected together by a shoulder 19.
- the tube 21 has a supporting shoulder 28 against the thermosensitive element 20.
- the spring 26, in abutment on the plug 23, maintains the heat-sensitive element 20 and the shoulder 28 of the tube 21 against the shoulder 19.
- the plug 23, which is integrally mounted by threading the front 18 of the shock pad, has a larger axial bore 29 diameter than the internal bore 22 of the tube 21, as well as a imprint 31, for example of the hexagonal type, intended for ensure its mounting.
- the rear part 32 of the shock buffer has a channel radial 33 which opens out inside the axial channel 24.
- the tubular heat-sensitive element 20 is produced in a shape memory material from the group of compounds such as defined in the previous embodiment. This item has been educated to lengthen or shorten when passing of the threshold temperature.
- Figure 3 corresponds to the situation of a operating at a high temperature, therefore at a viscosity weak hydraulics.
- the thermosensitive element 20 is located in consequence in the state of high temperature, i.e. that it has a small axial dimension.
- the spring 26 has compensated for the axial shortening of element 20 by pushing one end 34 of tube 21 in front of the radial channel 33, so as to close it.
- the passage oil is then only done, in the traditional way, by the leakage section between the shock buffer 13 and the ring 14.
- Figure 4 shows a temperature situation low, corresponding to a high oil viscosity.
- the heat-sensitive element 20 a reacts to the drop in temperature, passing from the high temperature state to the state low temperature as soon as it has exceeded the temperature of threshold, extending axially. This lengthening caused the displacement of the tube 21 in a direction F, opening the additional oil passage 30 at the radial channel 33.
- the passage 30 thus increases the amount of laminated oil and thus modulate the mass re-entry speed receding, so as to make it substantially stable which whatever the temperature.
- This embodiment has the advantage of being able to use the definition of shock pads known in the art prior.
- Figures 5 and 6 show a third mode of creation of a speed regulation device reentry of a cannon according to the invention.
- the modulation system 17 is composed of a spring 40, a rod 41, an element thermosensitive cylindrical 42 and a threaded plug 43.
- the rod 41 has a groove 44 whose role will be explained further.
- the additional passage of oil 30 is ensured by a radial channel 45 and a blind axial channel 46.
- the radial channel 45 opens into the axial channel 46 and passes through a second axial channel 47 in which is placed the modulation 17.
- the heat-sensitive element 42 is made of a material with form memory of the group of compounds as defined in the first embodiment. This item was educated for lengthen or shorten when the temperature passes threshold.
- Figure 5 corresponds to the operating situation at a high temperature, therefore at a hydraulic viscosity low.
- the heat-sensitive element 42 is therefore located in the high temperature state, i.e. it has a strong axial dimension. In this position, the spring 40 is compressed and the radial channel 45 is closed by the rod 41. The oil passage is then done only, so traditional, by the leakage section between the buffer shock 13 and the ring 14.
- Figure 6 shows a temperature situation low, corresponding to a high oil viscosity, where the heat-sensitive element 42 a reacts to the drop in temperature by shortening axially, passing from the high temperature state to the low temperature state.
- This compression caused displacement of the rod 41 in a direction F, under the influence of spring 40, until the groove 44 is located at the level of the radial channel 45, opening the additional oil passage 30.
- the oil passage takes place then by the cumulation of the leakage section between the buffer of shock 13 and the ring 14 and the additional passage 30.
- the advantage of this embodiment which is the mode preferential, is that the heat-sensitive element is not subject to oil pressure during operation.
- Figure 7 shows a fourth embodiment a device for regulating the reentry speed in battery of a cannon according to the invention.
- This embodiment differs from the previous one only in the design of the modulation system 17.
- This is composed of a rod 50 and a heat-sensitive element 53.
- the rod 50 has a radial opening 51 and a shoulder 52.
- the front end of the shock pad has a cap 54 which holds the rod 50 axially.
- the cap is pierced a bore 57 intended to allow the passage of the oil.
- FIG. 8 is a view along A of the front end of the shock pad 13, excluding cap 54.
- thermosensitive element 53 consists of a spring spiral secured on the one hand to the shock pad 13 by one of its ends 55, for example by means of screws and on the other hand of the rod 50 by the other end 56, which is for example introduced into a slot made at the end of the stem.
- the spiral spring 53 is made of a material with form memory of the group of compounds as defined in the first embodiment. This item was educated for lengthen or shorten when the temperature passes threshold.
- the spiral spring 53 passes from the state high temperature in low temperature state. He reacts by shortening, which causes an angular displacement of the rod 50 which brings the orifice 51 in alignment with the channel radial 45 so as to open the additional oil passage 30. The oil passage then takes place by the accumulation of the leakage section between the shock buffer 13 and the ring 14 and additional passage 30.
- the spring hairspring 53 lengthens after the temperature of threshold, which causes an angular displacement in direction reverse of the rod 50 so as to close the radial channel 45.
- Figure 9 shows a fifth embodiment a device for regulating the reentry speed in battery of a cannon according to the invention.
- This embodiment differs from the previous one only in the design of the modulation system 17.
- This is composed of a flap 60 secured to a heat-sensitive element 61 taking the form of a bent blade.
- This blade is integral with the shock buffer 13, for example by through screws.
- the front end of the shock pad also has a cap 54.
- the heat-sensitive blade 61 is made of a material with form memory of the group of compounds as defined in the first embodiment. This item was educated for open or close when the temperature of threshold.
- Figure 10 shows the front end of the impact 13 along B, excluding cap 54.
- Figure 11 shows a temperature situation low, corresponding to a high oil viscosity, where the temperature sensitive slide 61 a reacts to a drop in temperature by unfolding, passing from the high temperature state to the state low temperature, which caused angular displacement flap 60 in a direction G, so as to bring the opening 62 opposite the passage 30.
- the leakage section is thus increased by passage 30.
- these mass braking devices retractable at the end of reentry can be integrated in another type of fire brake.
- they can be mounted in a fire brake equipped with a fur or shirt with a profiled opening instead a counter rod system.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Damping Devices (AREA)
- Primary Cells (AREA)
Abstract
Description
- une masse reculante, constituée essentiellement par un ensemble tube-culasse,
- un lien élastique, généralement hydraulique, interposé entre la masse reculante et un affût du canon.
- la figure 1 est une coupe schématique d'un frein de tir recevant un dispositif de freinage de la rentrée en batterie, en position repos.
- la figure 2 est une coupe d'un dispositif de régulation de la vitesse de rentrée en batterie d'un canon, selon un premier mode de réalisation.
- la figure 3 est une coupe d'un dispositif de régulation de la vitesse de rentrée en batterie d'un canon, selon un deuxième mode de réalisation, représenté à haute température.
- la figure 4 représente le dispositif de régulation de la figure 3, à basse température.
- la figure 5 est une coupe d'un dispositif de régulation de la vitesse de rentrée en batterie d'un canon, selon un troisième mode de réalisation, représenté à haute température.
- la figure 6 représente le dispositif de régulation de la figure 5, à basse température.
- la figure 7 est une coupe d'un dispositif de régulation de la vitesse de rentrée en batterie d'un canon, selon un quatrième mode de réalisation.
- la figure 8 est une vue suivant A de l'extrémité avant du tampon de choc de la figure 7.
- la figure 9 est une coupe d'un dispositif de régulation de la vitesse de rentrée en batterie d'un canon, selon un cinquième mode de réalisation.
- la figure 10 est une vue suivant B de l'extrémité avant du tampon de choc de la figure 9, représenté à haute température.
- la figure 11 est une vue suivant B de l'extrémité avant du tampon de choc de la figure 9, représenté à basse température.
Claims (11)
- Dispositif de régulation de la vitesse de rentrée en batterie d'un canon d'artillerie en fonction de la température, comprenant un tampon de choc (13) coopérant avec une bague (14), de façon à assurer un freinage progressif du canon en fin de rentrée en batterie par laminage de l'huile au travers d'une section de fuite (15) située entre le tampon et la bague, dispositif caractérisé en ce qu'il comporte au moins un dispositif de modulation (17) comprenant un élément thermosensible réalisé dans un alliage à mémoire de forme, élément assurant par sa déformation, un accroissement de la section de fuite lorsque la température descend sous un seuil donné.
- Dispositif selon la revendication 1, caractérisé en ce que l'élément thermosensible est constitué par la bague (14).
- Dispositif selon la revendication 1, caractérisé en ce que l'élément thermosensible est solidaire du tampon de choc (13).
- Dispositif selon la revendication 3, caractérisé en ce que l'élément thermosensible est constitué par le tampon de choc (13).
- Dispositif selon la revendication 3, caractérisé en ce que le tampon de choc (13) comporte un passage supplémentaire d'huile (30) dont la section est modifiée par le dispositif de modulation (17) déplacé par l'action de l'élément thermosensible.
- Dispositif selon la revendication 5, caractérisé en ce que le passage supplémentaire d'huile (30) est constitué par au moins un canal axial borgne (24) débouchant à l'avant du tampon de choc (13) et par un canal radial borgne (33) réalisé à un niveau arrière (32) du tampon de choc, les deux canaux communiquant entre eux.
- Dispositif selon la revendication 6, caractérisé en ce que le dispositif de modulation (17) comprend un tube (21) placé à l'intérieur du canal axial (24) du tampon de choc (13), tube susceptible de venir obturer le canal radial (33) sous l'action de l'élément thermosensible (20) lorsque la température dépasse le seuil donné, le tube étant déplacé axialement dans un sens par l'action de l'élément thermosensible et dans l'autre sens par l'action d'un ressort (26).
- Dispositif selon la revendication 6, caractérisé en ce que le tampon de choc (13) comporte un deuxième canal axial borgne (46) débouchant à l'extrémité du canal radial (45) afin d'assurer le passage supplémentaire d'huile (30) et en ce que le dispositif de modulation (17) comprend une tige axiale (41) placée à l'intérieur du premier canal axial (41), tige susceptible de venir obturer le canal radial sous l'action de l'élément thermosensible (42) lorsque la température dépasse le seuil donné.
- Dispositif selon la revendication 8, caractérisé en ce que la tige (41) comporte une gorge (44) de passage d'huile et est déplacée axialement dans un sens par l'action de l'élément thermosensible (42) et dans l'autre sens par l'action d'un ressort (40) afin d'amener la gorge en face du canal radial (45) du tampon de choc (13).
- Dispositif selon la revendication 8, caractérisé en ce que la tige (50) comporte un orifice radial (51) de passage d'huile situé au niveau du canal radial (45) du tampon de choc (13) et en ce que la tige est déplacée angulairement par l'élément thermosensible (53).
- Dispositif selon la revendication 6, caractérisé en ce que le dispositif de modulation (17) comprend un volet (60) susceptible d'obturer l'extrémité avant (62) du canal axial du tampon de choc, volet déplacé angulairement par l'élément thermosensible (61).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9814929A FR2786260B1 (fr) | 1998-11-25 | 1998-11-25 | Dispositif de regulation de la vitesse de rentree en batterie d'un canon d'artillerie en fonction de la temperature |
FR9814929 | 1998-11-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1004843A1 true EP1004843A1 (fr) | 2000-05-31 |
EP1004843B1 EP1004843B1 (fr) | 2003-02-12 |
Family
ID=9533241
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99402752A Expired - Lifetime EP1004843B1 (fr) | 1998-11-25 | 1999-11-05 | Dispositif de régulation de la vitesse de rentrée en batterie d'un canon d'artillerie en fonction de la température |
Country Status (4)
Country | Link |
---|---|
US (1) | US6227097B1 (fr) |
EP (1) | EP1004843B1 (fr) |
DE (1) | DE69905330T2 (fr) |
FR (1) | FR2786260B1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6644168B1 (en) * | 2002-08-12 | 2003-11-11 | General Dynamics Armament And Technical Products, Inc. | System and method for active control of recoil mechanism |
CN104534921B (zh) * | 2014-12-31 | 2016-05-04 | 于克清 | 消除后坐力的装置 |
CN109520371A (zh) * | 2018-11-27 | 2019-03-26 | 中国人民解放军陆军工程大学 | 一种考虑温度变化的火炮复进机液量检查方法 |
US10823523B1 (en) | 2019-09-25 | 2020-11-03 | Mandus Group Llc | Temperature compensator for artillery system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1505915A (fr) * | 1965-12-30 | 1967-12-15 | Rheinmetall Gmbh | Frein hydraulique de canon |
USH217H (en) * | 1984-12-24 | 1987-02-03 | The United States Of America As Represented By The Secretary Of The Army | Recoil mechanism |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE469243B (sv) * | 1989-10-11 | 1993-06-07 | Bofors Ab | Anordning vid rekylerande system |
FR2724715B1 (fr) * | 1994-09-19 | 1996-12-27 | Giat Ind Sa | Dispositif de reglage en fonction de la temperature exterieure d'un systeme d'equilibrage d'une piece d'artillerie |
-
1998
- 1998-11-25 FR FR9814929A patent/FR2786260B1/fr not_active Expired - Fee Related
-
1999
- 1999-11-05 DE DE69905330T patent/DE69905330T2/de not_active Expired - Fee Related
- 1999-11-05 EP EP99402752A patent/EP1004843B1/fr not_active Expired - Lifetime
- 1999-11-24 US US09/444,702 patent/US6227097B1/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1505915A (fr) * | 1965-12-30 | 1967-12-15 | Rheinmetall Gmbh | Frein hydraulique de canon |
USH217H (en) * | 1984-12-24 | 1987-02-03 | The United States Of America As Represented By The Secretary Of The Army | Recoil mechanism |
Also Published As
Publication number | Publication date |
---|---|
DE69905330T2 (de) | 2003-09-18 |
DE69905330D1 (de) | 2003-03-20 |
FR2786260A1 (fr) | 2000-05-26 |
US6227097B1 (en) | 2001-05-08 |
EP1004843B1 (fr) | 2003-02-12 |
FR2786260B1 (fr) | 2000-12-29 |
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