流体机械

2010, v.38;No.455(05) 29-33+7

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三缸内燃泵配流阀容积效率对整机性能影响的仿真研究
Simulation Study on Influence of Valve's Characteristic on Total Performance of Three Cylinders Internal Combustion Water Pump

姜勇;杨道斋;
JIANG Yong,YANG Dao-zhai(Qingdao University,Qingdao 266071,China)

摘要(Abstract):

介绍了内燃泵(ICP)的结构原理,并对其进行了动力分析。考虑液体可压缩性与液体连续流条件建立了ICP配流阀的动力学模型,研究了阀的容积效率特性。阀的固有频率接近样机工作频率的整数倍时,容积效率大幅度降低。样机标定转速与容积效率最低转速较为接近,不利于系统正常稳定工作,应该对配流阀结构进一步优化。容积效率的变化对ICP的燃油消耗率、输出流量、有效热效率、有效功率等性能指标影响较大,但对输出压力基本没有影响。
The structural principle and dynamic analysis of internal combustion pump(ICP) was discussed.Taking the compressibility and continuity characteristics of liquid into account,the dynamic model of valves was constructed,and the volumetric efficiency characteristic was studied.When the natural frequency of valves is approximately to the round number times of the working frequency,volumetric efficiency is seriously low.The nominal rotational speed of the prototype is nearly to the speed where the volumetric efficiency is lowest,which is harmful to the normal work of ICP,so further structure optimization of valves should be carried out.The change of volumetric efficiency has great influence on the fuel consumption rate,output flow,effective thermal efficiency,effective power,and so on,but little on output pressure.

关键词(KeyWords): 内燃机;水泵;阀;模型;性能
internal combustion engine;water pump;valve;model;performance

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基金项目(Foundation): 国家自然科学基金项目(50975146);; 国家高新技术研究发展计划(863计划)项目(2008AA04Z117)

作者(Author): 姜勇;杨道斋;
JIANG Yong,YANG Dao-zhai(Qingdao University,Qingdao 266071,China)

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