| 摘要:以某船用柴油机的配气机构为研究对象，基于多体动力学理论，建立进气传动链动力学仿真模型。结合动力学测试结果，开展船用柴油机配气机构的动力学试验与仿真研究。对不同工况下的气阀动态升程、推杆动态受力等的仿真结果与试验结果进行对比分析，结果表明：气阀升程最大值的计算偏差在1%以内，推杆动态受力最大值的计算偏差小于10%，证明配气机构动力学模型具有一定的准确性。在此基础上，针对柴油机转速、气阀间隙、弹簧刚度对气阀落座速度的影响开展仿真分析，结果表明：柴油机转速和气阀间隙对气阀落座速度的影响较大，弹簧刚度对气阀落座速度的影响较小。 |
| 关键词: 船用柴油机 配气机构 动力学 气阀升程 |
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| Dynamic Simulation of Valve Train Based on Pushrod Dynamic Load and Valve Lift |
| YANG Dan,LI Liting,HU Yun,LIANG Gang,YIN Xiao,LIU Hao |
| National Key Laboratory of Marine Engine Science and Technology， Shanghai 201108， China;Shanghai Marine Diesel Engine Research Institute， Shanghai 201108， China |
| Abstract:Taking the valve train of a certain marine diesel engine as the research object，the intake valve train dynamical model was established based on multi-body dynamics theory.The dynamic test and simulation of the marine diesel engine valve train was carried out based on the dynamic test results.The simulation results and experimental results of the dynamic valve lift and the dynamic load on the push rod under different operating conditions were compared and analyzed.The results showed that the calculation deviation of the maximum value of valve lift was within 1%，and the calculation deviation of the maximum load on the push rod was less than 10%，which proved the accuracy of valve train dynamic model.On this basis，simulation analysis was conducted on the effects of diesel engine speed，valve clearance，and spring stiffness on valve seating speed.The results show that diesel engine speed and valve clearance has a greater impact on valve seating speed，while spring stiffness has a smaller impact. |
| Key words: marine diesel engine valve train dynamics valve lift |
