王冠,邓建飞,寇琳媛,金鹏飞,朱学军,马玉山
WANG Guan,DENG Jianfei,KOU Lingyuan,JIN Pengfei,ZHU Xuejun,MA Yushan

• 1:宁夏大学机械工程学院
• 2:宁夏大学宁夏智能装备CAE重点实验室
• 3:吴忠仪表有限责任公司

摘要(Abstract)：

为了系统研究节流结构参数对调节阀降压性能的影响,对串式多级降压调节阀阀芯的内流与节流特性进行了研究,分析了不同结构参数对其内部流动特性的影响规律。结果表明,多级降压调节阀整体流量系数随着开度的增大而增大;流道倾角对节流结构控压性能有重要影响,当节流结构流道倾角设置为48°时,可以获得最低的紊流度;倒角能够显著减少涡流的产生;在流道倒角位置采用6 mm倒角时较无倒角方案平均湍动能降低73%,同时能够有效降低湍流耗散率,减小出口处分配的压降,避免汽蚀的发生。研究结果能够为串式多级降压调节阀的结构设计与优化提供理论支持。
In order to systematically study the influence of the throttling structure parameters on the step-down performance of the control valve,the internal flow and throttling characteristics of the spool of the tandem multi-stage step-down control valve were studied and the influence of different structural parameters on its internal flow characteristics was analyzed.The results show that the overall flow coefficient of the multi-stage step-down control valve increases with the increase of the opening;the flow channel inclination angle has an important influence on the pressure control performance of the throttling structure,and the lowest turbulence can be obtained when the flow channel inclination angle of the throttling structure is set to 48°；the chamfering can significantly reduce the generation of vortices;the average turbulence energy is reduced by 73% compared to the nonchamfering solution when a 6 mm chamfer is used in the flow channel chamfering position, and the turbulence dissipation rate can be effectively reduced.The chamfering also reduces the turbulent dissipation rate,reduces the pressure drop at the outlet to avoid cavitation.The results of the study can provide theoretical support for the structural design and optimization of the tandem multistage step-down control valve.

关键词(KeyWords)： 多级降压调节阀;流量系数;流阻系数;结构参数;计算流体力学
multi-stage step-down control valve;flow coefficient;flow resistance coefficient;structural parameters;CFD

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目（2018YFB2004000）;; 宁夏重点研发计划项目（2017，西部之光）;; 宁夏科技支撑计划项目（2017，高端阀结构优化关键技术及冲蚀性能研究）;; 宁夏青年拔尖人才项目（2020）

作者(Author): 王冠,邓建飞,寇琳媛,金鹏飞,朱学军,马玉山
WANG Guan,DENG Jianfei,KOU Lingyuan,JIN Pengfei,ZHU Xuejun,MA Yushan

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