摘要
对周隙密封进行热弹流研究,分析周隙密封的流场、压力场和温度场。计入热弹变形的作用,比较不同参数如转速和不同密封瓦材料等因素对密封性能的影响。研究表明:密封瓦热膨胀变形非常显著,密封瓦体的热变形为向瓦体外部膨胀,使密封瓦油膜间隙变大,泄流量增大;随着转速的升高,密封瓦的侧泄流量和温升均迅速增加;使用热膨胀率较低的碳碳复合材料,将使密封瓦的侧泄流量和功耗大大降低。
The performance of plane seals was studied with thermo-elastic dynamic lubrication theory. The flow field, film pressure and film temperature of plane seals were analyzed including the thermo-elastic deformation. The effects of the seal material and rotating speed on the performance of the plane seal were studied. It is found that the sealing bush has obvious thermo-elastic deformation, which makes oil clearance increase and leakage increase. The side leakage and oil temperature increase rapidly with the increase of the rotating speed. The side leakage and power loss decrease by using C/C material significantly.
出处
《润滑与密封》
CAS
CSCD
北大核心
2011年第2期92-95,共4页
Lubrication Engineering
关键词
侧泄流量
热弹变形
复合材料
周隙密封
side leakage
thermo-elastic deformation
composite
plane seal
