某大缸径柴油机增压器振动问题研究  

Research on Vibration of Turbocharger in a Large Bore Diesel Engine

作　　者：袭著鑫 王明阳 胡亮 王鑫 许晓颖 吴永强 XI Zhuxin;WANG Mingyang;HU Liang;WANG Xin;XU Xiaoying;WU Yongqiang(Engine Research Institute,Weichai Power Co.,Ltd.,Weifang 261061,China;State Key Laboratory of Internal Combustion Engine and Power System,Weifang 261061,China)

机构地区：[1]潍柴动力股份有限公司,山东潍坊261061 [2]内燃机与动力系统全国重点实验室,山东潍坊261061

出　　处：《内燃机》2024年第3期49-52,共4页Internal Combustion Engines

基　　金：国家重点研发计划项目(2017YFC0211305)。

摘　　要：针对某大缸径柴油机增压器在标定点发生共振导致高振动水平问题,通过对激励源、增压器自身结构以及激励传递路径的综合分析,并结合模态仿真和振动试验,研究了49Hz共振频率产生的原因。结果表明:柴油机在标定点运行时,并未产生49Hz的共振频率,且振动水平保持在较低状态。增压器的前三阶模态频率分别为22Hz、57Hz和72Hz,在柴油机标定工作点同样不存在这些模态频率的共振现象。进一步分析发现,排气尾管是影响增压器振动的主要因素。为了降低增压器的振动水平,采取了加强排气尾管约束的措施。本文的研究成果不仅为解决台架增压器排气管路系统设计问题提供了思路,同时也为柴油机关键零部件的设计和振动故障分析提供了参考依据。In order to solve the problem of high vibration level caused by resonance of a large bore diesel engine turbocharger at the calibration point,through comprehensive analysis of the excitation source,the structure of the turbocharger itself,and the excitation transmission path,combined with modal simulation and vibration testing,the cause of the 49Hz resonance frequency was studied.The research results show that the diesel engine does not produce a 49Hz resonance frequency when operating at the calibration point,and the vibration level remains low.The first three modal frequencies of the turbocharger are 22Hz,57Hz,and 72Hz,and there is no reso-nance phenomenon of these modal frequencies at the calibration point of the diesel engine.Further analysis found that the exhaust tail pipe is the main factor affecting the vibration of the turbocharger.In order to reduce the vibration level of the turbocharger,measures to strengthen the constraint of the exhaust tail pipe were taken.The research results of this article not only provide ideas for solving the design problem of the turbocharger exhaust pipe system on the bench,but also provide a reference basis for the design and vibration fault analysis of key components of diesel engines.

关 键 词：增压器 仿真 模态 振动 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]