冷却方式对柴油机活塞温度及二阶运动的影响  

Effect of Cooling Mode on Temperature Field and Second-order Motion of Diesel Engine Piston

作　　者：邓立君 熊培友 张学禄 李猛猛 DENG Lijun;XIONG Peiyou;ZHANG Xuelu;LI Mengmeng(College of Electromechanical Engineering,Binzhou University,Binzhou 256600,Shandong,China;Binzhou Bohai Piston Co.,Ltd.,Binzhou 256602,Shandong,China;School of Mechanical Engineering,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]滨州学院机电工程学院,山东滨州256600 [2]滨州渤海活塞有限公司,山东滨州256602 [3]上海交通大学机械与动力工程学院,上海200240

出　　处：《机械科学与技术》2022年第11期1773-1779,共7页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(52075047);滨州学院基金项目(BZXYZZJJ201703,2018Y13)。

摘　　要：为了研究冷却方式对活塞温度场及二阶运动的影响,应用硬度塞法测试了两种结构柴油机活塞的表面温度(内腔无冷却盲孔和有冷却盲孔),以此测试数据对活塞温度场有限元仿真结果进行了标定,仿真计算得到了两种结构的活塞温度场分布,进而分析了内腔冷却盲孔对活塞温度及二阶运动摆角和摩擦磨损的影响规律。结果表明:有冷却盲孔活塞相对于无冷却盲孔活塞各关键部位温度都有所降低,尤其是二环槽主推力侧部位,降低了13.2℃,裙部主、次推力侧也均降低了约11℃;同时,活塞内腔温度最大降低25℃,降低了约10%,对于降低活塞热负荷作用十分明显;另外,活塞裙部接触压力、磨损载荷及摩擦损失都明显降低。In order to study the influence of the cooling mode on the temperature field and second-order motion of the diesel engine piston, the surface temperature of two differences structure models with and without blind cooling holes in the piston core of diesel engine was measured by using the plug of hardness test method. The finite element method was used to simulate the temperature field which the results was verified by the experiment data, as well as the effect of the two different piston structure on the thermal load was studied. The results show that the blind holes in the piston core of diesel engine can decrease the temperature of piston comparing with that without blind holes, the temperature of piston second groove in TS reduced 13.2 ℃,and the skirt temperature reduced 11 ℃. At the same time, the temperature in the piston core reduces the largest up to 25 ℃, was reduced by 10%. In addition, the contact pressure, wear load and friction loss of the piston skirt are significantly reduced.

关 键 词：有限元分析 温度场 活塞 硬度塞 热负荷 

分 类 号：TK422[动力工程及工程热物理—动力机械及工程]