摘要
针对造纸厂等企业中含有固体颗粒、纤维工况的流体介质对阀门冲蚀磨损问题,以V型调节球阀为研究对象,对中阀芯锥角30°的V型球阀进行阀芯优化,旨在为了减少冲蚀磨损进而设计出两种不同结构流通面积的阀芯锥角。对比分析阀芯锥角分别为30°,60°,90°的V型球阀,应用CFD软件对其内部流场进行三维数值模拟,通过模拟计算得到流量特性曲线、流道内的速度分布云图、压力分布云图和速度矢量图。结果表明,优化后的阀芯结构相比初始结构,阀内最大压力由535.43 kPa降至492.70 kPa逐渐稳定,阀内最低压力由低于饱和蒸汽压的-242.67 kPa升至150 kPa,减少了空化现象;且速度更加均匀稳定,阀内高速流通区域平均速度由27.77 m/s^(2)降至19.53 m/s^(2);提高了调节性能和流通稳定性,同时延长了阀门的使用寿命。
For the problem of valve erosion and wear caused by the fluid medium containing solid particles and fibers in paper mills and other enterprises,by taking the V-shaped regulating ball valve as the research object,the valve core of V-shaped ball valve with valve core cone angle of 30°was optimized with a view to designing two different valve core cone angles with different structural flow areas in order to reduce erosion wear.The V-shaped ball valves with valve core cone angles of 30°,60°,and 90°were compared and analyzed,and the CFD software was used to carry out three-dimensional numerical simulation of the internal flow field.The flow characteristic curve,the velocity distribution nephogram in the flow channel,the pressure distribution nephogram and velocity vector diagram were obtained through simulation calculation.The results show that,compared with the initial structure,for the optimized valve core structure,the maximum pressure in the valve is gradually stabilized from 535.43 kPa to 492.70 kPa,and the minimum pressure in the valve is increased from-242.67 kPa,which is lower than the saturated vapor pressure,to 150 kPa,which reduces the cavitation phenomenon.And the speed is more uniform and stable,the average speed of the high-speed flow area in the valve is reduced from 27.77 m/s^(2) to 19.53 m/s^(2);the adjustment performance and flow stability are improved,and the service life of the valve is extended at the same time.
作者
王佳琪
何世权
喻临风
张锦
刘帅帅
WANG Jiaqi;HE Shiquan;YU Linfeng;ZHANG Jin;LIU Shuaishuai(School of Mechanical and Power Engineering,Nanjing University of Technology,Nanjing 211816,Jiangsu)
出处
《流体机械》
CSCD
北大核心
2022年第9期100-104,共5页
Fluid Machinery
基金
江苏省研究生实践创新计划(自然科学类)(SJCX21_0524)。
关键词
V型球阀
阀芯优化
流通面积
流量特性
数值模拟
V-shaped ball valve
valve core optimization
flow area
flow characteristics
numerical simulation