摘要
基于弹性流体动力润滑理论,建立了4缸柴油机主轴承润滑仿真模型,研究了不同转速下内燃机轴瓦与轴承座的弹性变形、轴瓦与轴颈粗糙度对主轴承润滑特性的影响。研究结果表明:5个主轴承膜厚比均大于1,其中第5主轴承峰值油膜压力与其他4个主轴承相比明显偏大,而且存在偏磨现象,润滑相对恶劣;优化后第5主轴承峰值油膜压力平均降低了20%,最小油膜厚度平均增加了25%,摩擦功耗平均降低了43%。
On the basis of elastohydrodynamic （EHD） lubrication theory, the main bearing lubrication simulation model for a four cylinder diesel engine was established to research elastic deformation of the bear- ing shells and bearing seat and effect of the bearing shells and journal surface roughness on main bearing at different speeds. Research results indicate that the film thickness ratios of all five main bearings are more than 1, and the peak oil film pressure of the No. 5 main bearing is remarkably larger than others and it is in relatively poor lubrication, resulted in uneven wearing. After optimization, the peak oil film pressure of the No. 5 main bearing decreases by 200//oo, and the minimum oil film thickness increases by 25~, friction loss power reduces by 43%
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2012年第1期87-92,共6页
Chinese Internal Combustion Engine Engineering
基金
云南省科技强省计划项目(2007AD005)
科技部科技人员服务企业行动项目(2009GJF30001)
关键词
内燃机
主轴承
弹性流体动力润滑
油膜厚度
IC engine
main bearing
elastohydrodynamic lubrication
oil film thickness
