摘要
计算了某16缸V形机车柴油发电机组滑动主轴承在不同功率(2 000、2 430、2 650、2 940kW)下的润滑情况.将曲轴设为弹性体,以考虑曲轴弹性变形对主轴承润滑状态的影响.对主轴承在工作过程中发生的摩擦接触,采用Greenwood-Tripp粗糙接触模型来计算,并用AVL相关标准评价了润滑计算结果.由计算结果看出,4个计算工况中的2 940、2 650和2 000kW工况均存在个别轴承处于半干摩擦状态的情况,而2 430kW工况的润滑情况相对最好;第8、7、1主轴承为工作中相对危险的主轴承,危险主轴承位置和摩擦接触发生的部位与实际情况接近.试分析了造成第8、7、1主轴承出现摩擦接触的结构性原因.
The lubrication conditions of the main bearings of a 16 cylinders V form diesel generator set in four operation conditions（2 000,2 430,2 650,2 940 kW） were simulated.The crankshaft was assumed as an elastic body to consider the deformation influence on lubrication performance of main bearings.Greenwood-Tripp asperity contact model was used to calculate the contact force in the friction area.Simulation results were examined by AVL criterion.Generator set is in the best lubrication condition at 2 430 kW work state,and there exists semi-dry friction in other work states.Nos.8,7,1 main bearings are the vulnerable ones among all main bearings.The calculation results of the asperity contact place are identical with the real wearing location.The reasons of the asperity contact at Nos.8,7,1 main bearings are discussed.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
2011年第4期505-511,共7页
Journal of Dalian University of Technology
关键词
主轴承
弹性流体动力润滑
曲轴
弹性变形
粗糙接触
main bearing
elastohydrodynamics lubrication
crankshaft
elastic deformation
asperity contact
