高输出能量火工分离装置密封强化技术研究

Seal Enhancement Technology of Pyrotechnic Separation Device with High Output Energy

针对某火工分离装置在高输出能量条件下的烟雾泄漏问题,进行了原因分析,提出改进方案并对改进后火工分离装置的输出性能和密封性能进行了试验验证。结果表明:密封圈压缩率低(2.1%)是造成密封失效的主要原因;提出去掉螺杆与壳体间的密封圈,并在活塞与壳体间设计2道密封圈,优化活塞密封槽尺寸,将密封圈最小压缩率增加至15%,以及在装药组件和活塞之间增设可变形不锈钢挡火圈的改进措施。验证试验表明改进后的火工分离装置输出性能满足要求,分离过程中无烟雾或其他气体产生,达到了无污染目的;作用后挡火圈呈内凹状,起到了阻隔燃气的作用。

Aimed at the smoke leakage problem of some pyrotechnic separation device under the condition of high output energy condition,the cause analysis was carried out,the improvement scheme was proposed and the output performance and sealing performance of the improved pyrotechnic separation device were tested and verified.The results show that the low compression rate of the sealing ring(2.1%)is the main reason for sealing failure.The improvement measures were put forward,which include removing the sealing ring between the screw and the shell,and designing two sealing rings between the piston and the shell;Optimizing the size of the piston sealing groove to increase the minimum compression rate of the sealing ring to 15%;And adding a deformable stainless steel ring for stopping gas and smoke between the charging component and the piston.The verification test shows that the output performance of the improved pyrotechnic separation device meets the requirements;No smoke or other gas generate during the separation process,which achieve the pollution-free goal;The stainless steel ring forms an inner concave shape after action,which plays a role in blocking gas flow.