V型液压阀口节流特性多目标优化  

Multi-Objective Optimization for Throttling Characteristics of V-Notch

作　　者：周玲君[1] 殷晨波[1] 叶仪[1] 袁峰峰 

机构地区：[1]南京工业大学车辆与工程机械研究所,江苏南京211816

出　　处：《机械设计与制造》2014年第5期166-169,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金(50875122);江苏省科技支撑项目(BE2011187)

摘　　要：提出了用来衡量V型节流阀口节流特性指标:等效水力直径曲线Dh2的斜率dV2、阀口压降分配系数k、节流空化指数曲线σ2-X的值σ2A1in、σ2A1out。利用正交试验设计结构参数样本,运用模糊隶属度分析方法得到了节流特性较优的节流阀口结构参数组合。与初始的节流阀口结构相比较,其中dv2相对初始结构提高了177.19%;阀口压降分配系数k增加了149.98%,使阀口压降过分集中得到了缓解;空化集中截面A2附近的空化指数σ2A1in,σ2A1out分别下降了0.31%和14.99%,在一定程度上减轻了V型节流阀口的空化现象。Several parameters to evaluate the throttling characterization at the V-throttle outlet are presented here,including the slope dv2 of the equivalent hydraulic diameter curve Dh2,pressure drop distribution coefficient k at the valve outlet,σr2lin and σr2A1out of throttling index curveσ2-X.The orthogonal experiment is designed to establish structural parameters of samples,and fuzzy membership analysis is employed to obtain optimum structural parameter combinations for throttle opening.Compared with the original structure of throttle opening,dv2 improves up to 177.19%,k increases 149.98%,which releases the exceeding focus of pressure drop at the notch.Also,σ2Alin and σr2A1out reduce 0.31% and 14.99%,respectively.Consequently,the cavitation decreases to some degree at the V-throttle notch.

关 键 词：液压阀口 节流特性 空化 优化 正交试验 

分 类 号：TH16[机械工程—机械制造及自动化] TH137