阻尼四级可调减振器的结构改进与试验验证  

Structure improvement and test verification of four-level-damping adjustable hydraulic shock absorber

作　　者：缪小冬[1] 仲伟东 韩杰[1] 

机构地区：[1]南京工业大学机械与动力工程学院,江苏南京211800

出　　处：《轻工学报》2017年第5期74-80,共7页Journal of Light Industry

基　　金：江苏省自然科学基金项目(BK20130941)

摘　　要：为提高阻尼四级可调减振器使用寿命,采用仿真技术对其进行优化设计:建立阻尼四级可调减振器的仿真模型,利用ICEM CFD前处理软件、ANSYS Fluent流体分析软件对阀片进行流体动力学仿真,以获取相应活塞运动速度下阀片的应力及内部油液流动速度数据;将减振器活塞孔的通孔由无阶梯状对称直通孔改成阶梯孔,以增加油液流通面积.用台架试验的方法从阻尼特性、示功特性、速度特性3个方面进行性能试验,结果表明,改进后的减振器各项性能均有较大提升,能有效提高使用寿命,验证了该优化设计的可行性.In order to lengthen the life span of four-level-damping adjustable hydraulic shock absorber,the optimization design of the shock absorber was carried out by simulation technology.Its simulation model was established,the fluid dynamics simulation of valve was carried out by ICEM CFD pretreatment software and ANSYS Fluent fluid analysis software in order to obtain the stress and internal fluid flowing speed data of the valve under the corresponding piston movement speed.The optimization design of changing the non-step symmetrical through hole of piston hole of shock absorber to shoulder hole in order to increase the flowing area of fluid was proposed.The performance tested was made in the characteristics of damping,reactive power and speed.The result showed that the improved shock absorber improved in every aspect and could lengthen the life span,which verified the feasibility of the optimization design.

关 键 词：阻尼四级可调减振器 Fluent流体仿真 台架性能试验 

分 类 号：U463.335.1[机械工程—车辆工程]