工况及配缸间隙对活塞敲击力影响规律  

Analysis of the influence of operating conditions and piston-liner clearance on piston slap force

作　　者：李兴济 纪少波[2] 岳远航 尹伟[2] 于秋晔 马荣泽 程勇[2] LI Xingji;JI Shaobo;YUE Yuanhang;YIN Wei;YU Qiuye;MA Rongze;CHENG Yong(State Key Laboratory of Internal Combustion Engine Reliability(Weichai Power Co.,Ltd.),Weifang 261061,China;School of Energy and Power Engineering,Shandong University,Jinan 250061,China;Automotive Data of China(Tianjin)Co.,Ltd.,Tianjin 300393,China)

机构地区：[1]内燃机可靠性国家重点实验室(潍柴动力股份有限公司),山东潍坊261061 [2]山东大学能源与动力工程学院,济南250061 [3]中汽数据(天津)有限公司,天津300393

出　　处：《重庆理工大学学报（自然科学）》2023年第3期86-92,共7页Journal of Chongqing University of Technology：Natural Science

基　　金：山东省自然科学基金项目(ZR2020ME180);内燃机可靠性国家重点实验室开放课题项目(skler-202008);汽车零部件先进制造技术教育部重点实验室开放课题基金项目(2021KLMT01);汽车工业基础仿真软件关键技术研究项目(ZX20220002)。

摘　　要：针对发动机的运行工况及配缸间隙对活塞敲击力的影响规律展开研究。采用EXCITE软件搭建了活塞运动仿真模型与发动机多体动力学仿真模型。基于验证后的模型研究了活塞二次运动及活塞敲击力的特点,分析了转速及转矩等运行工况及配缸间隙的影响规律。研究结果表明:在压缩上止点附近活塞的二次运动最为明显,主推力面上存在最大活塞敲击力;随着转速的增加,活塞惯性力增大,使活塞敲击力增大;随转矩的增加,活塞所受侧向力增大,使得活塞敲击能量增加;随着配缸间隙的增加,活塞二次运动加剧,活塞敲击力相应增加。To investigate the influence of operating conditions of an engine and piston-liner clearance on piston slap force,this paper builds a piston motion simulation model and an engine multi-body dynamics simulation model based on the EXCITE software.The characteristics of the piston secondary motion and the piston slap force are studied through the verified models.The models are also used to analyze the effects of operating conditions like engine speed and torque as well as piston-liner clearance.The results show that the piston secondary motion is most obvious near the top dead center of the compression stroke and the maximum value of piston slap force appears at the main thrust side.With the increase of the rotational speed,the piston inertial force increases,which makes the piston slap force increase.With the increase of the torque,the lateral force of the piston increases,which strengthens the piston slap force.The piston secondary motion intensifies with the increase of the piston-liner clearance and this contributes to the increase of the piston slap force.

关 键 词：活塞-缸套摩擦副 活塞二次运动 活塞敲击力 仿真分析 影响规律 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程]