内燃机主轴承摩擦功率损失的影响因素  

Research on the Effect of Friction Power Loss of Internal Combustion Engines′ Main Bearings

作　　者：邵康[1] 刘昌文[1] 毕凤荣[1] 陆地[1] 张剑[1] 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,天津300072

出　　处：《振动．测试与诊断》2015年第6期1019-1024,1195-1196,共6页Journal of Vibration,Measurement & Diagnosis

基　　金：国家科技支撑计划资助项目(2015BAF07B04)

摘　　要：研究了影响主轴承摩擦功率损失的影响因素,包括轴承表面粗糙度、润滑油温度、曲轴转速、轴颈间隙和供油提前角,同时分析各影响因素对内燃机主轴承的影响。分析所用物理模型为直列六缸内燃机,其数学模型主要依据有限差分法与欧拉法求解雷诺方程,润滑油膜接触通过在时域内压力平衡迭代计算。对内燃机曲轴主轴承摩擦功率损失影响因素进行了探讨,计算结果表明,在内燃机零部件设计阶段应充分考虑轴承间隙以及表面粗糙度对摩擦功率损失的影响。This paper investigates the influence of friction power loss on the main bearings of an internal combustion engine crankshaft that accounts for the major tribological operating factors：main journal surface roughness,lubrication oil temperature,engine crankshaft speed,journal bearing clearance,and fuel supply advance angle.All these factors have been analyzed in detail for an in-line six-cylinder internal combustion engine.The mathematical model is mainly based on the Reynolds equation,which can be solved using the finite-difference method and the Euler method.The lubrication film contact is calculated based on the Reynolds differential equation via the pressure balance calculated iteratively in the time domain.The results show that friction power loss factors such as main bearing clearance and surface roughness should be considered engineering factors in the engine and component design process.

关 键 词：摩擦功率损失 主轴承 雷诺方程 内燃机 

分 类 号：TH113[机械工程—机械设计及理论] TH133.3