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双芳型发射药改性制备小粒药 总被引:3,自引:1,他引:3
讨论了双芳型发射药改性制备射钉枪弹用小粒药的制造工艺以及性能示性数,着重研究了小粒药制备过程中搅拌速度、驱溶速度对火粒度及密度的影响。对改性小粒药的粒度分布、燃烧热值和火药的装弹射击速度进行了定量测试。 相似文献
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针对身管武器装备炮口烟焰严重的问题,以5.8mm弹道枪为试验平台,测定了枪口烟雾粒径和可见光透过率;以30mm和某大口径火炮为试验平台,测定了不同发射药装药的炮口火焰面积;研究了消焰剂粒度、消焰剂药包装填位置、发射药弧厚、可燃支撑筒长度等装药结构对炮口烟焰的影响。结果表明,消焰剂(K2SO4)粒径从160μm降至3μm,有助于提高消焰效果,但会引起炮口烟雾的可见光透过率下降;消焰剂用量相同时,含顶部和底部消焰剂药包的组合结构抑制火焰效果优于仅含顶部消焰剂药包的结构;发射药弧厚从1.8mm增至2.0mm时,炮口火焰面积增大;炮口火焰面积随着可燃支撑筒长度增加而增大。 相似文献
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七孔发射药内外弧厚差异对其燃烧性能的影响 总被引:1,自引:0,他引:1
为了研究七孔发射药内外弧厚差异对其燃烧性能的影响,通过密闭爆发器静态燃烧试验及火炮发射药装药内弹道试验研究了内外弧厚一致性及弧厚偏差对高能低烧蚀叠氮硝胺七孔发射药燃烧性能的影响。结果表明,当发射药的内外弧厚差异较大时,密闭爆发器试验中发射药增面燃烧阶段结束点提前,增面燃烧阶段已燃百分数由85.46%降至70.76%,燃烧时间由23.40ms增至27.75ms;发射药燃烧时间随着温度变化的敏感性逐渐加大。装药发射试验中,当外弧厚大于内弧厚时,加大了装药的初速温度系数,初速温度系数由0.54m/(s·℃)增至0.78m/(s·℃),装药质量由9.4kg增至9.8kg,最大膛压由266.9MPa降至262.6MPa。 相似文献
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针对人工测量工业零件尺寸存在测量精度低、速率慢及用工成本高等问题,设计了一种基于机器视觉的工业零件尺寸测量算法。算法先对机器视觉系统进行畸变校准,获取图像校准信息。再对标准图像与被测零件图像进行形态学等预处理,并在此基础上根据设定的固定特征建立参考坐标系与测量坐标系。在基于测量坐标系相对于参考坐标系发生的平移、旋转量进行调整后测量区域内测量被测零件像素尺寸,根据图像校准信息将像素尺寸转化为真实尺寸。经实验证明,该算法在被测工件发生平移、旋转的情况下,具有较高的尺寸测量精度。 相似文献
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为研究发射药在膛内的燃烧规律,采用微波干涉仪、压电测试系统、30mm高压滑膛火炮建立了发射药膛内燃烧规律测试系统,并进行了相关试验。依据经典内弹道理论假设,建立了微波测试曲线处理方法,并对试验数据进行了处理。结果表明,实测膛底最大压力345.4MPa,用微波试验计算出的最大膛底压力为341M Pa,实测膛底压力曲线与由微波试验计算所得曲线能够较好地吻合。发射药膛内燃烧u-p曲线较爆发器中的平缓,发射药燃速与爆发器中的燃速相当。所建立的微波测试试验数据处理方法能够较好地反映发射药在火炮中的燃烧过程,5/7单基发射药在火炮中的燃烧规律与指数式燃烧公式有一定的偏离。 相似文献
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本文介绍一种用于机械产品如零部件、小组装或总装产品的尺寸误差的检测方法(已获发明专利)。采用基于多关节式三维测量机构、接触或非接触式空间量传感器的柔性三维测量技术对被检测产品的型面、特征点、定位基准等进行测量,以确认产品与设计原型或标准样本之间的一致性或与其他零部件的配合程度、检测产品制造的尺寸误差等,用于替代目前广泛使用的传统专用检具。本文同时给出一个基于可调式工装和低成本位移传感器的柔性检具实施案例。 相似文献
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我厂在一引进项目中,购置了一套哈尔马型直流测量系统。其目的除了作为考核外商的烧碱直流电耗保证值及直流参数测量外,还打算将这一套相对误差为±0.2%的装置作为原有设备上我厂自制的两套直流测量装置的标准校验设备。下面将这个系统作一简单介绍. 相似文献
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采用一种计算可压缩流体管道尺寸的计算方法来计算火炬系统管网的管径,在管网布置确定后,可由出口压力P_2反算入口压力P_1及各端管道尺寸,可方便处理带有支管的复杂管网系统。 相似文献
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Yu‐Zhu Pan Yong‐Gang Yu Yan‐Huang Zhou Xin Lu 《Propellants, Explosives, Pyrotechnics》2012,37(4):439-444
A new device for measuring the linear burning rate of liquid propellants at high pressures is reported. High‐pressure environments were generated by the combustion of solid propellants. The coated propellants, which burn progressively, were introduced to maintain the approximate constant‐pressure environments. By use of ion probe transducers, measurements were made of the spread velocity of the flame surface, i.e. the apparent linear burning rate of the HAN‐based liquid propellant LP1846 (HAN =hydroxylammonium nitrate) was measured quantitatively at pressures from 6 to 28 MPa. The results show that it follows the exponential burning rate law. The burning rate coefficient and exponent were fitted by least‐squares methods. Based on the experiment, a simplified model of the linear burning rate of HAN‐based liquid propellants at high pressures was developed. The numerical simulation is found to be in good agreement with the experimental data. 相似文献
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采用美国NI的虚拟仪器技术设计开发了高温高压三维填砂物理模型试验装置的实时测控系统,选用LabVIEW8.6软件开发平台和PXI模块化硬件平台,实现了整个试验过程的自动化,实现了各种试验设备和仪器的自动控制,测量了试验过程中动态三维压力场、饱和度场及分相流量等参数。 相似文献
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将传统的通用信号发生器与通用的测试仪的功能通过LabVIEW这个软件开发平台实现功能的高度集成,开发一种通用自动测试系统。以计算机和数据采集卡为基本硬件来实现激励信号的产生和响应信号的采集,本系统采用软件工程中面向组件的设计思想,从而使繁琐的编程过程转变为组件的开发和搭接两个步骤,同时采用严格数据类型的枚举控件,极大地提高了系统的可重用性和可扩展性。同时利用LabVIEW中同步控制技术中的Queue技术来完成通用自动测试系统组件的搭接,从而实现了信号源和测试仪的集成,由此避免了数据的丢失。 相似文献
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针对大型输送设备对中测量中人工操作存在的操作复杂及耗费时间长等缺点,提出一种基于虚拟仪器的对中测量系统.采用LD-PSD和激光位移传感器在LabVIEW环境下应用研华数据采集卡完成信号的采集与处理,探讨了影响测量稳定性的因素和解决方案.现场实验表明:系统能够准确、快速、稳定地给出测量结果,性能达到了预期要求. 相似文献
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《火炸药学报》2016,(3):17-20
The investigation aims at the expansion of the basis of formulations of solid composite propellants by introducing new compositions with lower sensitivity to mechanic impact and improved thermal stability.The formulations based on trinitropyrazole(TNP)contains a binder(a hydrocarbon or active one),aluminum and inorganic oxidizer ADN.The results show that a binary formulation TNP+active binder(18%-19%)(volume fraction)with no metal is well designed which would achieve high specific impulse(at Pc∶Pa=40∶1)of 248s,high density of 1.80g/cm3 and combustion temperature Tcabout 3 450K.In terms of energy,metal-free compositions with TNP lose a bit to those with HMX,only if HMX fraction in formulation is higher than 45%-50%. 相似文献
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Yu Chen Yun‐fei Liu Liang Shi Wei Yang Wei‐shang Yao 《Propellants, Explosives, Pyrotechnics》2015,40(1):50-59
An effective pathway was explored to design and select proper bonding agents that could effectively improve the interfacial interactions between bonding agents and solid particles, with three novel synthesized alkyl bonding agents, dodecylamine‐N,N‐di‐2‐hydroxypropyl‐acetate (DIHPA), dodecylamine‐N,N‐di‐2‐hydroxypropyl‐hydroxy‐acetate (DIHPHA) and dodecylamine‐N,N‐di‐2‐hydroxypropyl‐cyano‐acetate (DIHPCA), as examples. Molecular dynamics simulation was applied to compare unit bond energies of these bonding agents with the [110] crystal face of ammonium perchlorate (AP) and the [120] crystal face of hexogen (RDX). The infrared test was used to characterize the interfacial interactions of these bonding agents with AP or RDX. XPS test was applied to calculate the adhesion percentage of the bonding agents on the surface of precoated AP or RDX particles. All of the above results indicated that these three bonding agents have strong interfacial interactions with AP or RDX in the order of DIHPCA>DIHPHA>DIHPA. The prepared three bonding agents were used in HTPB/AP/RDX/Al propellants, and their effects on tensile strength (σ), elongation under maximum tensile strength (εm), elongation at breaking point of the propellant (εb) and adhesion index (Φ) of the propellant were studied. The results show that the bonding agents improve the mechanical properties of the propellant in the order of DIHPCA>DIHPHA>DIHPA. The methods found from theoretical design, materials synthesis, and mechanistics studies up to practical application show effective guiding significance for choosing the proper bonding agent and improving the interfacial interactions between the solid particles and binder matrix. 相似文献