金属橡胶高压精密流量阀流场分析  

Analysis of Flow Field in Metal-Rubber High-Pressure Precision Flow Valve

作　　者：张蕊华[1,2] 张建辉[2] 

机构地区：[1]丽水学院工学院,丽水323000 [2]南京航空航天大学机械机构力学及控制国家重点实验室,南京210016

出　　处：《振动．测试与诊断》2013年第1期71-74,166,共4页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(50965014;50905083);江西省自然科学基金资助项目(2010GZC0121);江苏省博士后科研资助计划(1002010C);国家外专局引智项目(20103600054)

摘　　要：为确保阀出口处输出流量和压力的稳定性,提出了采用压电陶瓷和金属橡胶两种材料设计的一种金属橡胶高压精密流量阀,利用压电陶瓷驱动流量阀的主阀芯实现对阀芯与阀体开口间位移的精密控制,利用金属橡胶材料的多孔性以及减压、节流和过滤等特点实现对阀出口处流体脉动的平纹波处理。运用Fluent仿真分析了阀出口处的平纹波特性和金属橡胶参数对阀腔内流体湍动能分布的影响规律。分析结果表明:在阀进、出口处安装金属橡胶环后,阀出口处流体速度变化平缓、方向趋于一致,流动更为平缓,一定程度上确保了阀输出流量和压力的稳定性;阀腔内流体的湍动能明显减小,阀腔内的流场更趋于平稳,从而提高了阀的使用寿命和启闭可靠性。To ensure the stability of the output flow rate and pressure,a metalrubber high-pressure precision flow valve is designed by using piezoelectric ceramic and metal rubber.It uses piezoelectric ceramic to drive main valve core to accurately control opening displacement between the spool and valve.As metal rubber has porosity,decompression,throttling and filtering characteristics,it can make the output fluid flow more smoothly and ensure the stability of the output flow rate and pressure.Based on Fluent,the smooth of the outlet fluid flow and the influence of metal rubber parameters on distribution of fluid turbulent kinetic energy in valve chamber are simulated.The results show that after installing the metal rubber ring at inlet and outlet,the velocity of output fluid flow changes smoothly and the directions reach unanimity,so that the flow of outlet is gentler.Thus,to some extent the metal rubber can ensure the stability of the output flow rate and pressure.In addition,after installing the metal rubber ring,the fluid turbulent kinetic energy in valve chamber is significantly reduced and the flow field of valve chamber tends to be more stable,so that the service life and on-off reliability of valve are improved.

关 键 词：金属橡胶 压电陶瓷 精密流量阀 湍动能 平纹波特性 

分 类 号：TH13[机械工程—机械制造及自动化] TB3[一般工业技术—材料科学与工程]