一、喷管堵盖的作用固体火箭发动机在结构上一般都为其喷管设计有一个堵盖。这个堵盖大体有两个作用:一是用来防潮密封。固体火箭发动机燃烧室的密封装置,除了头部和尾端采用密封圈(或密封垫)外,同时在喷管这个组件上,加一个盖子,即喷管堵盖(视需要有不 First, the role of nozzle plug Solid rocket engine in the structure of the nozzle are generally designed to have a plug cover. This block cover generally has two roles: First, to moisture-proof seal. The solid rocket engine combustion chamber sealing device, in addition to the head and end of the seal (or gasket), while the nozzle assembly, plus a cover, the nozzle blockage (if necessary, there is no