摘要
应用AVL EXCITE PU软件建立了某船用柴油连杆与弹性流体动力润滑轴承的多体动力学计算模型。计算分析了表面粗糙度、半径间隙、活塞销刚度对油膜动态特性的影响。分析结果表明:表面粗糙度增大,不利于油膜润滑;轴承半径间隙适当减小,有利于油膜润滑;供油方式改为压力供油改善油膜润滑没有明显;在缸内燃气爆发时刻之后,滑油填充率明显下降,有瞬时断油之虞。据此,为结构设计优化提供了理论依据。
A multi-body dynamics coupling model of a marine diesel engine connecting rod and elastic-hydrodynamic bearing lubrication was built by using AVL EXCITE PU software.Then the effects of structural design parameters such as surface roughness,radial clearance and stiffness of piston pin on dynamic characteristics of oil film were discussed in detail.The results show that the increase of surface roughness is not good for lubrication of oil film;on the contrary,proper decrease of radial clearance is good for it;pressure feed has no obvious effect;after the explosion,the lube oil packing rate declines considerably and has the possibility of transient oil cut-off.The results offer theoretical references for structure optimal design.
出处
《柴油机》
2011年第3期29-32,共4页
Diesel Engine
关键词
柴油机
连杆小头轴承
润滑
多体动力学
diesel engine
connecting rod small end bearing
lubrication
multi-body dynamics
