摘要
为考察端面密封在低黏度介质润滑条件下的特性,采用液氮介质模拟高速涡轮泵低黏介质润滑环境,通过对液氮介质润滑的端面密封进行2 s升速至2.9万转的快变升速过程以及120 s的稳定运行过程的试验研究,获得快变过程的端面温度、泄漏量、摩擦力、摩擦因数等各项密封性能数据。结果表明:随着转速增加,端面温升上升,液氮介质汽化出现两相现象,密封副处在干摩擦状态;当转速上升至24 000 r/min时密封泄漏量明显增加,但未超标;密封系统运转开始时,端面间干摩擦条件下的摩擦力较大,最大摩擦因数值为0.27,随着转速的逐渐增加,摩擦因数逐渐减小,最小摩擦因数为0.14。
In order to investigate the characteristics of face seal in the condition of low viscosity lubrication, liquid ni- trogen was used to simulate low viscosity lubricating environment of high-speed turbopump. Face temperature, leakage, friction force, friction coefficient and other sealing performance data were acquired from the experimental study： rapidly varying up process for liquid nitrogen lubricated face seal that rotational speed is accelerated to 29 000 r/min in 2 s and
出处
《润滑与密封》
CAS
CSCD
北大核心
2013年第8期28-31,共4页
Lubrication Engineering
基金
国家973计划项目(2009CB724304-2)
关键词
高速涡轮泵
端面密封
快变升速过程
两相润滑
high-speed turbopump
face seal
rapidly varying up process
two-phase lubrication
