| 摘要:以某大功率多缸柴油机为研究对象，采用EXCITE Power Unit软件建立隔振器-机体-曲轴的整机隔振系统弹流润滑仿真模型，对比分析机脚布置位置和隔振器刚度对主轴承润滑特性的影响。仿真结果表明：当机脚支撑跨度增加时，支撑位置的轴承孔位移和倾斜程度增加，主轴承粗糙接触压力升高，此时轴承合力降低，摩擦损失功和平均热载改善；当隔振器刚度提升时，主轴承润滑特性趋于改善，采用刚度方案二（刚度为7 920 N/mm）时可获得较优润滑指标，继续提升刚度的收益有限。 |
| 关键词: 大功率柴油机 隔振器 主轴承 润滑特性 |
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| Influence of Diesel Engine Vibration Isolator Configuration on Main Bearing Lubrication Characteristics |
| WU Peng,WANG Haibing,WU Limin,ZHANG Yanting,LI Mei |
| Shanghai Fourth Military Representative Office of Navy，Shanghai 201108，China;Shanghai Marine Diesel Engine Research Institute， Shanghai 201108，China |
| Abstract:Taking a high-power multi-cylinder diesel engine as the research object，an elasto-hydrodynamic lubrication simulation model of the whole engine vibration isolating system，including isolator，engine body and crankshaft，was established using the Excite Power Unit software.The impact of engine mount positions and vibration isolator stiffness on the lubrication characteristics of the main bearings was investigated.The simulation results reveal that：Enlarging the span of the engine mounts leads to increased displacement and tilt of the bearing holes，resulting in increased rough contact pressure，and then，the joint force of the bearings decreases，and the frictional loss work and average thermal load improve；When the stiffness of the isolator is increased，the lubrication characteristics of the main bearing tend to improve，and adopting stiffness scheme No.2（stiffness is 7 920 N/mm）can achieve better lubrication indicators，and the benefits of further increasing of stiffness are limited. |
| Key words: high-power diesel engine vibration isolator main bearing lubrication characteristic |
