【摘要】 超高速机械动密封需满足CZ-5运载火箭伺服系统中涡轮泵可靠性及寿命指标要求。离子注入作为重要的金属材料表面改性技术,对有效改善机械密封副旋转环表面摩擦磨损特性至关重要。在对密封动环表面离子注入可行性研究的基础上,提出了对其密封副配对摩擦磨损特性进行综合验证的试验方案。通过选取常用典型石墨与旋转金属环配副进行干磨条件下的试验测试,改变线速度、端面比压,使用摩擦磨损试验机对比分析了配对摩擦副的摩擦磨损特性,系统研究了载荷和转速对密封副配对摩擦系数的影响规律,揭示其密封摩擦学特性。通过机械密封在温度应力下的工作可靠性分析以及密封副整机稳态工作性能验证,为超高速涡轮泵的寿命与可靠性试验验证提供了一个合理的、高效费比的技术途径。更多还原

【Abstract】 The super-high speed turbo of the CZ-5 launch vehicle servo system has both reliability and life requirements.As an important metal surface modification technology,ion implantation is critical to effectively improving frictional wear characteristics of mechanical-seal swiveling ring.The integrated test plan is designed for an seal-pair frictional wear characteristics based ion-implantation seal swiveling ring feasibility.The frictional wear characteristics of typical graphite used in space field with steel pair are compared by universal friction and wear tester.Based on the effects of linear velocity,face pressure of hard ring on wear volume and friction coefficient are studied.Therefore,the comprehensive tribological properties of the friction pair are studied by the effect factor of load and speed,and the tribological properties will be disclosed.Through the reliability analysis of the mechanical seal pair under the temperature stress and the verification of the steady-state working performance of the seal pair,the application of these plans will offer a reasonable and high effectiveness-cost rate way for life and reliability compliance test of super high-speed turbopump.更多还原