关键词: 液氢泵;挠性支承;阻尼;系统稳定性

Abstract: In order to determine the support characteristic for rotor dynamic of LOX/LH 2 turopump in high pressure staged combustion rocket engine,an investigation was carried out for the characteristic of new damped flexible support with the radial force of less than 10 kN and bearing preloaded force of 980 N～2 205 N By means of experiments and computation,the effects of some factors on the characteristic for the support system were emphasized and those factors include:deformation,stress distribution,limited element model of turn back squirrel cage flexible support;damping characteristic of metal rubber damper;dual rolling bearings and their preloaded force.

Key words: Liquid hydrogen pump;Flexible support;Damping;System stability