为解决某高压试验装置内膛密封问题，根据膛内外压力差异设计了一种增压自胀式高压密封结构。利用ABAQUS有限元软件建立密封结构的平面轴对称模型，仿真计算得到该密封结构在高温高压火药气体作用下的应力分布和动态变形，根据密封面残余间隙的时间响应对该结构的密封性能进行评估，结果表明：在0.38～1.02 ms的高压时间段，炮身与筒体之间残余间隙值为零，密封性能良好。该密封结构满足高压试验装置的密封要求，为解决火炮等高压设备和装置的密封技术问题提供了有效途径。%In order to solve the bore seal problem of high voltage test device, a supercharged self-expansion sealing structure was designed based on the bore pressure difference. The axisymmetric plane model of the sealing structure was established and calculated by ABAQUS to obtain the stress distribution and dynamic deformation of the sealing structure under high temperature and pressure of powder gas, in addition, sealing performance of the structure was evaluated according to the time response of residual gap, the results showed that sealing performance of the structure is good when the barrel and cylinder residual clearance value is zero in the high period of 0.38~1.02 ms. The sealing structure can meet the requirements of high-voltage testing apparatus and offer an effective method for solving the sealing technology problem of the artillery and other high-voltage equipment.
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