摘要
利用基于非连续介质力学的离散单元法,建立颗粒流润滑的楔形滑块研究模型,重点就颗粒介质的摩擦因数对摩擦学系统特性的影响进行仿真研究。指出颗粒流润滑的摩擦阻力峰和压力峰位置与流体动压润滑不同,出现在楔形的入口区。颗粒摩擦因数较小时系统摩擦因数比较小,颗粒流的总载荷比较大,是工程应用中应优先选择的。同时,对平均接触力、体功、接触摩擦功和颗粒总动能4个微观参数进行了研究,研究结果有助于理解颗粒流润滑的微观特性。
Based on discontinuous mechanics, the non--fluidized particles flow lubrication model in tilting pad tribopairs was proposed by the discrete element method. The influence of particle＇s friction coefficient was investigated mathematically. The results indicate that the peak of load profile and friction force profile are located in the entrance of tilting pad under particles flow lubrication which is different from fluid lubrication. Particles with lower friction coefficient can decrease the friction coefficient and increase the load capacity of tribosystem, which provides helpful guidance to engineering applications. The study of the micro characteristics that include the average contact force, body energy, contact friction energy and particle kinetic energy were carried out at the same time, which revealed the micro characteristics of particles flow lubrication.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2009年第7期856-860,共5页
China Mechanical Engineering
基金
国家自然科学基金资助项目(50775060)
关键词
颗粒流
润滑
离散元
摩擦因数
particles flow
lubrication
discrete element method
friction coefficient
