消除活塞敲缸的减振阻尼装置设计  

Design of Damping Device for Removing Piston Knock

作　　者：王建平[1] 许永泰[1] 张世和[1] 甄洪梅[1] 王红丽[1] 

机构地区：[1]中国北方发动机研究所(天津),天津300400

出　　处：《车用发动机》2014年第4期17-21,共5页Vehicle Engine

摘　　要：针对某风冷单缸柴油机气缸套-活塞环摩擦力测试过程中活塞敲击气缸套产生的振动对测试精度的影响问题,通过功率单元的动力学分析、模态分析及谐振响应分析,确定了系统激振力、气缸套固有频率及受迫振动的频率范围。在不改变气缸套结构的前提下,依据柴油机不同工况的载荷条件,设计相应的可避免产生共振的弹性阻尼装置并进行了试验验证。结果表明:弹性阻尼装置可有效抑制活塞敲击气缸套产生的振动,能够为气缸套-活塞组摩擦力的准确测量提供保障。For the piston knock influencing measurement of friction force between cylinder liner and piston ring in an air-cooled single cylinder diesel ,the system excitation force and the natural and forcing frequency of cylinder liner were determined based on the dynamic analysis ,modal analysis and harmonic oscillation response analysis of power unit .On the basis of keeping the cylinder liner structure unchanged ,the elastic damping device was designed and verified according to different loads of engine operating conditions .The results show that the device can restrain the piston knock effectively and ensure the accurate meas-urement of friction force between cylinder liner and piston ring .

关 键 词：单缸柴油机 敲缸 气缸套 振动分析 阻尼 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程]