Method and device for realizing fuse self-failure by bonding
阅读说明：本技术 一种粘接实现引信自失效的方法和装置 (Method and device for realizing fuse self-failure by bonding ) 是由 黄振贵 罗驭川 连江凯 孙晓晖 陈志华 于 2019-08-05 设计创作，主要内容包括：本发明公开了粘结实现引信自失效的装置,在引信体内部预先储存胶粘剂,该存储装置与引信着发机构可共用一套安保机构确保平时与待发时均不作用。当弹丸发射后安保机构解锁,待弹丸击中目标后,或者未击中目标后掉落至地面时,撞击目标或者地面的目标反力与前冲直线惯性力作为使存储装置启动工作的环境力。进而存储装置工作,胶粘剂释放充斥整个引信体各个机构,粘死各部分机构,使整个机械引信无法再产生任何动作。可最小程度降低占用引信空间与制造成本。(The invention discloses a device for realizing fuse self-failure by bonding, which stores adhesive in advance in a fuse body, wherein the storage device and a fuse striking mechanism can share sets of security mechanisms to ensure that the storage device and the fuse striking mechanism do not act at ordinary times and in the process of firing, when the security mechanism is unlocked after a projectile is fired, and the projectile falls to the ground after hitting a target or not hitting the target, the target counter force and the forward straight line inertia force which impact the target or the ground serve as environmental forces for starting the storage device to work, so that the storage device works, the adhesive is released to fill all the mechanisms of the whole fuse body, and all the mechanisms are stuck to cause the whole mechanical fuse to generate no action any more, and the space occupied by the fuse and the manufacturing cost can be reduced to the minimum extent.)
A method for realizing the self-failure of fuse by adhesion includes such steps as setting a storage unit containing adhesive in the fuse body, using a safety mechanism to ensure that the adhesive is not acted when it is used, launching the fuse, using the counter force of the target and the inertial force of straight forward line to start the storage unit when the fuse hits the target or drops to ground, and releasing the adhesive to fully lock the fuse body.
The device for realizing the self-failure of the detonator by bonding comprises a detonator seat (1), a detonator (2) and a detonating device (3), wherein the detonator (2) and the detonating device are arranged in the detonator seat (1), and is characterized by further comprising a detonator mechanism connected in series to the detonator seat (1);
the fuze mechanism comprises a fuze lower shell (4), a fuze upper shell (5), a main striker (6), an auxiliary striker (7), a sulfuric acid storage bottle (8), an adhesive storage bottle (9) and an auxiliary striker sleeve (10);
the detonator lower shell (4) is connected in series to the detonator seat (1), the auxiliary firing pin sleeve (10) is arranged in the detonator lower shell (4), the part of the main firing pin (6) is higher than the auxiliary firing pin sleeve (10), the adhesive storage bottle (9) and the sulfuric acid storage bottle (8) are sleeved on the part in an up-down stacking manner, the other part part gradually extends through the auxiliary firing pin sleeve (10) and extends into the detonator seat (1) to be opposite to the detonating device (3), the auxiliary firing pin (7) is arranged on the surface of the auxiliary firing pin sleeve (10), and the needle point of the auxiliary firing pin is opposite to the sulfuric acid storage bottle (8) and is spaced from each other;
the fuze upper shell (5) is fixed on the main firing pin (6) and covers the main firing pin (6), covers the sulfuric acid storage bottle (8), the adhesive storage bottle (9) and the auxiliary firing pin (7), and is connected and sealed with the auxiliary firing pin sleeve (10).
3. The device for realizing the self-failure of the fuse by bonding according to claim 1, wherein: the lower fuse shell (4) is conical, and a cylindrical hollow body for placing the auxiliary firing pin sleeve (10) and the upper fuse shell (4) is arranged in the lower fuse shell.
4. The device for realizing the self-failure of the detonator by bonding according to claim 1 is characterized in that the auxiliary firing pin sleeve (10) is of a hollow cylindrical structure, springs (11) in a compressed state are arranged in the auxiliary firing pin sleeve, two ends of each spring (11) respectively abut against the top and the bottom of the auxiliary firing pin sleeve (10), and the springs (11) are sleeved on the periphery of the main firing pin (6) penetrating through the auxiliary firing pin sleeve (10).
5. The device for realizing the self-failure of the fuze by bonding according to claim 1, characterized in that the main striker (6) comprises a striker cap (60), an th security plate (61), a second security plate (62) and a needle rod (63), wherein the end of the needle rod (63) with gradually reduced diameter is called a needle point, the other end with constant diameter is called a needle tail, the th security plate (61) and the second security plate (62) are arranged around the needle rod (63), the th security plate (61) is close to the needle tail, the striker cap (60) is connected and protruded on the surface of the th security plate (61), and the adhesive storage bottle (9) and the sulfuric acid storage bottle (8) are clamped between the th security plate (61) and the second security plate (62).
6. The device for realizing the self-failure of the fuse by bonding according to claim 5 is characterized in that the needle striking cap (60) is in threaded connection with the upper fuse shell (5), the adhesive storage bottle (9) is fixedly connected with the th security plate (61), the sulfuric acid storage bottle (8) is fixedly connected with the second security plate (62), and the diameter of the second security plate (62) is smaller than that of the th security plate (61).
7. The device for realizing the self-failure of the fuse by bonding according to claim 5, wherein: the number of the auxiliary firing pins (7) is two, and the auxiliary firing pins are symmetrically distributed around the main firing pin (5).
8. The device for realizing the self-failure of the fuse by bonding according to claim 1, wherein: the fuse upper shell (5) is of an inverted cylindrical structure, the inner wall of the top of the fuse upper shell is concave inwards to form a circular groove, and threads are arranged on the inner wall of the circular groove.
9. The device for realizing the self-failure of the fuse by bonding according to claim 5, wherein: the adhesive storage bottle (9) is internally filled with JL-6717 polyurethane adhesive.
10. The device for realizing the self-failure of the fuse by bonding according to claim 1, wherein: the sulfuric acid storage bottle (8) and the adhesive storage bottle (9) are made of organic glass, the Poisson ratio is 0.2, the Young modulus is 3.2GPa, and the density is 1180kg/m3。
Technical Field
The invention belongs to the technical field of cartridge fuse, and particularly relates to methods and devices for realizing fuse self-failure.
Background
The fuse self-failure device is a mechanism or a component which can eliminate the detonation output action of a fuse explosion sequence after an ammunition fuse is subjected to normal launching, throwing and flying environments.
The present available self-failure technology of fuse, initiation first-shot explosion element technology and recovery safety technology are all the self-failure technology of ammunition fuse, and the initiation first-shot explosion element is to detonate the first-shot explosion element after fixed time delay under the premise of that the fuse first-shot explosion element is not aligned with the detonation train according to the preset condition, and after the fuse is relieved, the recovery safety technology adopts gunpowder, electronic, chemical or other timing mode, and in fixed time domain, the fuse can be ignited and self-destructed, and when the preset time is exceeded, a special mechanism is used to make the fuse recover safety.
Disclosure of Invention
Aiming at the mechanical fuse, the principle of the invention is that the fuse mechanism is stuck after the mechanical fuse is misfired, so that the fuse can not generate the action any more, and the safety of the subsequent recovery and treatment of the unexploded ammunition is ensured.
The working principle of the mechanical fuse is that the safety is relieved by utilizing the environmental force in the launching process, when the fuse hits a target, exposed parts of the fuse are subjected to the target reaction force, and internal parts of the fuse are subjected to the forward impact inertia force, so that the launching mechanism acts. The higher the striking speed of the firing pin, the less energy is required for the firing of the firing cap. The firing pin acts under the action of the target counter force and the forward impact inertia force to poke a firing cap or a detonator at a high speed, so that the shot is ignited and detonated.
The reason for the misfire of the mechanical fuze is that the speed of the striker is not enough to provide enough ignition energy to ignite the cap after the striker is punched, the misfire occurs due to the normal firing of the cap after the striker is punched and the detonation sequence is problematic and the misfire caused by the failure of the striker to dig the cap is that the striker cannot operate normally due to the failure of the mechanical fuze to deform and seize the internal mechanism.
Regardless of the reasons for misfire, the mechanisms of the fuze stick to each other after the projectile has been misfired, so that the striker cannot move any more, but is stationary relative to the ignition mechanism, and cannot generate external energy input, thereby causing the fuze to fail by itself.
The technical scheme includes that methods for realizing fuse self-failure are adopted, a storage device filled with adhesive is arranged in a fuse body, a security mechanism ensures that the adhesive does not act with the fuse at ordinary times, when a bullet is launched, the security mechanism is unlocked, and when the bullet hits a target or drops to the ground without hitting the target, the target counter force and the forward-stroke linear inertia force which impact the target or the ground serve as environmental forces for starting the storage device to work, then the storage device works, the adhesive releases and fills all mechanisms of the whole fuse body, all mechanisms are adhered to the fuse body, and the whole mechanical fuse is locked and cannot generate any action.
device for realizing fuse self-failure by bonding, which comprises a detonator seat, a detonator and a detonating device, wherein the detonator and the detonating device are arranged in the detonator seat, and the device is characterized by also comprising a fuse mechanism connected in series with the detonator seat;
the fuze mechanism comprises a fuze lower shell, a fuze upper shell, a main striker, an auxiliary striker, a sulfuric acid storage bottle, an adhesive storage bottle and an auxiliary striker sleeve;
the detonator lower shell is connected in series with the detonator seat, the auxiliary firing pin sleeve is arranged in the detonator lower shell, part of the main firing pin is higher than the auxiliary firing pin sleeve, the adhesive storage bottle and the sulfuric acid storage bottle are sleeved on the part in an up-down laminated manner, the other part part gradually extends through the auxiliary firing pin sleeve and extends into the detonator seat to be opposite to the ignition device, the auxiliary firing pin is arranged on the surface of the auxiliary firing pin sleeve, and the needle point of the auxiliary firing pin is opposite to the sulfuric acid storage bottle and is mutually spaced;
the fuse upper shell is fixed and covers the main firing pin, and covers the sulfuric acid storage bottle, the adhesive storage bottle and the auxiliary firing pin in a cage manner, and is connected and sealed with the auxiliary firing pin sleeve.
, the lower casing of the fuse is cone-shaped, and the inside of the lower casing is provided with a column hollow for placing the sleeve of the auxiliary firing pin and the upper casing of the fuse.
, the sleeve of the auxiliary firing pin is hollow and cylindrical, springs are arranged in the sleeve of the auxiliary firing pin, two ends of each spring respectively support against the top and the bottom of the sleeve of the auxiliary firing pin, and the springs are sleeved on the periphery of the main firing pin penetrating through the sleeve of the auxiliary firing pin.
, the main firing pin comprises a firing pin cap, a safety plate, a second safety plate and a pin rod, wherein the end with gradually reduced diameter is called the pin tip, and the diameter is kept constant
The other ends are called needle tails, the security plate and the second security plate are arranged around the needle bar, the security plate is close to the needle tail, the striker cap is connected and protrudes out of the surface of the security plate, and the adhesive storage bottle and the sulfuric acid storage bottle are clamped between the security plate and the second security plate.
, the needle striking cap is in threaded connection with the upper fuse shell, the adhesive storage bottle is fixedly connected with the security plate, the sulfuric acid storage bottle is fixedly connected with the second security plate, and the diameter of the second security plate is smaller than that of the security plate.
And , the number of the secondary striker pins is two, and the secondary striker pins are symmetrically distributed around the main striker pin.
, the fuse upper shell is an inverted cylinder structure, the inner wall of the top of the fuse upper shell is concave inwards to form a circular groove, and the inner wall of the circular groove is provided with threads.
And , storing JL-6717 polyurethane adhesive in the adhesive storage bottle.
step, the sulfuric acid storage bottle and the adhesive storage bottle are made of organic glass, the Poisson ratio is 0.2, the Young modulus is 3.2GPa, and the density is 1180kg/m3。
Has the advantages that: according to the invention, the fuse body is connected in series on the detonator seat, so that the parallel connection structure of the ignition device and the detonator in the prior art is changed, and the space occupied by the fuse and the manufacturing cost are reduced. The unique mode of using sticky fuze part, through material verification and simulation test, all show that this structure can effectively guarantee the security of the follow-up recovery of unexplosive powder and processing.
Description of the drawings:
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a diagram of an improved design model with a self-disabling device;
FIG. 3 is a graph of the overall stress of the structural model when the projectile penetrates the soil;
FIG. 4 is a graph showing the impact stress on the storage bottle from the striker as the projectile penetrates the soil;
FIG. 5 shows the stress curve of the storage bottle hit by the striker pin as the projectile penetrates the soil.
Reference numerals
The detonator comprises a 1-detonator seat, a 2-detonator, a 3-detonating device, a 4-detonator lower shell, a 5-detonator upper shell, a 6-main firing pin, a 7-auxiliary firing pin, an 8-sulfuric acid storage bottle, a 9-adhesive storage bottle, a 10-auxiliary firing pin sleeve, an 11-spring, a 60-firing pin cap, a 61- th security board, a 62-second security board and a 63-needle rod.
Detailed Description
the invention will be further elucidated with reference to the drawings and specific embodiments, it being understood that these embodiments are merely illustrative of the invention and are not intended to limit the scope of the invention, and that various equivalent modifications of the invention will occur to those skilled in the art upon reading the present invention and fall within the scope of the appended claims.
The device for realizing the fuse self-failure by bonding comprises a detonator seat, a detonator and a detonating device. The detonator and the igniter are arranged in the detonator seat, and the main firing pin faces the igniter.
As shown in figure 1, the
The middle part of the
Two secondary striker pins 7 are fixed on the outer wall of the top of the secondary
The upper
In this example, a JL-6717 polyurethane adhesive was selected. The main component of the polyurethane is a polymer containing-NHCOO-in the main chain. The adhesive has good adhesive property and no corrosion to base materials. Meanwhile, the paint has excellent water resistance, cold resistance, oil resistance, good thixotropy, corrosion resistance, impact resistance, vibration resistance, good flexibility and other excellent characteristics.
The specific physical and chemical properties of the adhesive are listed in table 1.
TABLE 1 JL-6717 relevant parameters for polyurethane adhesives
The above performance data are typical data measured in a laboratory environment at a temperature of 25 deg.c and a humidity of 70%.
In the existing available glue substances, the storage time can reach 3 years at most before use, because the adhesive for bonding metal is a high molecular material, the material can age and degrade along with time, and the catalyst or the initiator added in the adhesive is an active substance and can lose efficacy after being placed for a long time in a natural state.
Reliability analysis and simulation verification
1. Device functional reliability simulation verification
According to the improved design, a simulation model of the figure 2 is established by using Solidworks, and Ansys Workbench is led in for simulation verification.
The storage bottle is made of organic glass, and when the properties of the material are set, the Poisson ratio is 0.2, the Young modulus is 3.2GPa, and the density is 1180kg/m3。
When the projectile impacts the target, the resistance varies from target to target. After the projectile body impacts soil, the target resistance in the penetration process is the minimum, and the landing speed of the projectile body is set to be 200m/s as the external condition of the model. Under the initial velocity loading, the transient dynamics analysis module analyzes the model, and the analysis results of fig. 3 to 5 can be obtained.
From the curves in fig. 5, the maximum stress of the storage bottle against the striker pin during penetration of the projectile through the soil was 124.3 GPa. From the reference: research progress of toughening and modifying organic glass in Yandes, Huangchenya and Wang Shao east [ J ] Chinese plastics, 2001 (11): 12 to 16, the tensile strength of the organic glass can reach 70 MPa. Therefore, the stress generated by the storage bottle when the shot penetrates the soil and is impacted by the striker is far greater than the strength of the material of the storage bottle, so that the storage device is broken after the shot hits a target or is not exploded and falls to the ground, and the reliability of action of the storage device is ensured.
2. Adhesive bonding self-failure reliability analysis
And after enough reaction time, the adhesive bonding is considered to be finished, and the safety and the reliability of the adhesive are analyzed and calculated when the service is processed. The references describe: fuze design [ M ] of the beijing industry academy trigger fuze textbook & research room, beijing: beijing institute of industry, 1976; an acceleration of 700g was measured when the unpacked part fell to ground, which is the maximum possible acceleration during service handling. When the reliability is calculated, the inertia force generated by impact is taken as the peeling force, and the extreme condition that the inertia force reaches the maximum can be considered during theoretical calculation: the living organism is adhered to the shell, and whether the living organism is peeled off from the shell under the corresponding inertia force of 700g is analyzed and calculated.
And the data of testing the peel strength after the polyurethane adhesive is coated between the iron sheets is used as the theoretical calculation basis of the bonding peel strength of each mechanism material in the fuze body. The peel strengths of the polyurethane adhesives of different grades are different after being bonded, and the lower value of the peel strength is 120kN/m and is taken as a calculated value of the peel strength sigma.
The improved design is based on a prototype number fuze for 81mm and 60mm mortar shell, taking the diameter of the shell as 60mm as an example, the simplified calculation can be considered that the diameter of a living organism is half of the diameter, namely 30mm, the living organism is bonded with the inner cavity of the shell, the bonding length is the circumference length C
F1＝aC＝120000×π×0.0152＝85N (1)
The quality of a fuse living organism is disclosed by the reference: fuze design [ M ] of the beijing industry academy trigger fuze textbook & research room, beijing: the mass m is calculated by taking 40g of the larger value of the mass m obtained by the Beijing industry college, 1976. The largest inertia force generated by a living organism during service processing is
F2＝mg＝0.04×700＝28N (2)
Due to F2＞F1The inertia force generated during the service processing can not strip off each mechanism of the fuse after being bonded, thereby ensuring the bonding self-failure reliability of the adhesive.
It will thus be seen that the embodiments are illustrative and not restrictive in any respect point of view, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment contains independent technical solutions, and such description is only for clarity, and those skilled in the art should be able to make whole descriptions, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that can be understood by those skilled in the art.
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