LE-5液氢涡轮泵采用了端面密封和浮动环密封两种密封型式。这种液氧-液氢发动机是专为日本H-1火箭而设计的,密封的工作条件是:转速50,000r/min,密封压力1.87MPa。 1.端面密封这种端面密封是一个焊接的金属波纹管机械密封,其构造如图1所示。它的平均摩擦直径、凸缘宽度、摩擦速度、压力平衡比以及弹簧力见表1。图2是改进前后密封凸缘的构造示意图。改进后密封圈的护圈在端部与波纹管相连接,以减少热感应变形,凸缘阻尼器由 LE-5 liquid hydrogen turbo pump with a face seal and floating ring seal two seal types. This liquid oxygen - liquid hydrogen engine is designed for the Japanese H-1 rocket design, the sealing conditions are: speed 50,000r / min, sealing pressure 1.87MPa. 1. Face Seal This face seal is a welded metal bellows mechanical seal, the structure shown in Figure 1. Its average friction diameter, flange width, friction speed, pressure balance ratio and spring force are shown in Table 1. Figure 2 is a modified front and rear seal flange schematic structure. Improved seal ring retainer at the end connected with the bellows, in order to reduce thermal deformation, flange damper by