摘要
分析了液压阀密封副端面粗糙轮廓波谷面积和弹性接触点面积的微观接触机理.以缝隙流动的N-S方程和分形理论为基础,研究了泄漏量与表面粗糙度、分形参数、密封接触比压之间的关系及泄漏量分形模型.并对平面密封缝隙泄漏量、作用在阀芯表面上的密封力与粗糙表面的分形维数、分形尺度系数之间的关系进行了数值仿真,由此得出:提高零件的加工精度可以减小液压阀的泄漏量;泄漏量随端面形貌变化而不断变化,而密封副初始表面形貌对泄漏量起着关键作用,通过控制表面形貌参数可以有效降低液压阀泄漏量.
Analyzed microscopic contact mechanism of wave trough and elastic point contact area of rough surface on hydraulic valve, and researched leakage model of fractal parameters of leakage rate and surface roughness, fractal parameter, sealing contact pressure based on aperture current N - S equation and fractal dimension. And then the relations of fractal parameter, seal force and leakage rate were discussed by numerical simulation. Results show that improving precision and controlling surface appearance parameters of part are able to availably reduce leakage rate of hydraulic valve.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2008年第6期694-698,共5页
Journal of China Coal Society
基金
国家自然科学基金资助项目(50775155)
关键词
液压阀
分形维数
泄漏模型
hydraulic valve
fractal dimension
leakage model
