笼式调节阀的冲蚀磨损与空蚀  

Analysis of erosion and cavitation wear in the cage-typed control valve

作　　者：乔元 仇畅[3] 钱锦远 干瑞彬[4] 徐春明 金志江[3] QIAO Yuan;QIU Chang;QIAN Jinyuan;GAN Ruibin;XU Chunming;JIN Zhijiang(School of Chemical Engineering and Environment,China University of Petroleum(Beijing),Beijing 102249,China;Ordos Coal to Liquid Branch of China Shenhua Coal to Liquid Chemical Co.,Ltd.,Ordos 017200,Inner Mongolia,China;Institute of Chemical Machinery,Zhejiang University,Hangzhou 310027,Zhejiang,China;China Nuclear Suvalve Technology Industry Co.,Ltd.,Suzhou 215129,Jiangsu,China)

机构地区：[1]中国石油大学(北京)化学工程与环境学院,北京102249 [2]中国神华煤制油化工有限公司鄂尔多斯煤制油分公司,内蒙古鄂尔多斯017200 [3]浙江大学化工机械研究所,浙江杭州310027 [4]中核苏阀科技实业股份有限公司,江苏苏州215129

出　　处：《化工进展》2023年第10期5111-5120,共10页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(51875514,52176046)。

摘　　要：基于均质平衡流模型、空化模型和离散相模型,对煤直接液化工程中的笼式调节阀内气液固多相流动进行了仿真分析与预测,分析了阀内冲蚀磨损和空化空蚀的基本分布特征,并结合阀笼实际失效情况,验证分析结果并确定了阀笼失效的主要原因。结果表明:阀内空化发生的主要区域均位于阀笼的内层节流孔内。阀门入口压力不变时,随着阀门开度的增加,蒸汽相体积随之增加,流体流经的节流孔数增加,空化发生范围也随之增加,空蚀强度也随之增强;阀笼导流槽内壁受颗粒直接冲击中心及周围区域存在明显变形和穿透性缺陷,多个开度下冲蚀磨损速率最高的区域均位于导流槽内壁远离调节阀的进口侧;阀笼内壁内层节流孔出口周围的坑状缺陷主要是由于空化气泡破灭冲击壁面产生。Based on the homogeneous equilibrium flow model,the cavitation model and the DPM model,the simulation and prediction of the gas-liquid-solid multiphase flow in the cage-typed control valve are carried out,and the distribution of erosion wear and cavitation in the valve is analyzed.Combined with the actual failure situation of the cage,the analysis results were verified and the main reason for the failure of the cage was determined.The results showed that the main areas of cavitation in the valve were located in the inner orifice of the valve cage.With the increase of the valve opening,the vapor volume increased,the number of orifices through which the fluid flows increased,the cavitation range and intensity also increased.Due to the high-speed impact of particles on the inner wall of the diversion groove,there were obvious deformation and penetration defects in the center and surrounding areas were directly impacted by the particles.The areas with the highest erosion wear rate under multiple openings were located on the inner wall of the guide groove away from the valve inlet side.The pit-like defects around the outlet of the orifice in the inner wall of the cage were mainly caused by the collapse of the cavitation bubbles and the impact on the wall.

关 键 词：笼式调节阀 多相流 冲蚀磨损 空化 失效分析 

分 类 号：TH134[机械工程—机械制造及自动化] TQ055[化学工程]