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工程设计学报
工程设计学报  2022, Vol. 29 Issue (1): 74-81    DOI: 10.3785/j.issn.1006-754X.2022.00.006
建模、仿真、分析与决策     
主给水调节阀节流窗口周向设计及其对流动特性的影响
吴嘉懿1, 岳阳2, 李军业2, 金志江1, 钱锦远1
1.浙江大学 化工机械研究所， 浙江 杭州 310027
2.中核苏阀科技实业股份有限公司, 江苏 苏州 215129
Circumferential design of throttling window of main feed water regulating valve and its influence on flow characteristics
WU Jia-yi1, YUE Yang2, LI Jun-ye2, JIN Zhi-jiang1, QIAN Jin-yuan1
1.Institute of Process Equipment, Zhejiang University, Hangzhou 310027, China
2.SuFa Technology Industry Co., Ltd., CNNC (China National Nuclear Corporation), Suzhou 215129, China
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摘要： 安装于核电站二回路的主给水调节阀通过控制给水流量来调节蒸汽发生器内的水位高度，因此主给水调节阀的流动特性影响着核电站的运行安全与效率。首先，提出了无量纲的节流窗口周向布置不平衡度δ，进行主给水调节阀节流窗口周向设计；其次，利用经网格无关性与流量实验验证的数值模拟方法分析了阀内流场的速度和压力分布特性；最后，探讨了节流窗口周向布置不平衡度对阀芯不平衡力矩和阀门流量系数的影响。结果表明：阀芯底部不均匀的压力分布会对阀芯产生不平衡力矩，增大阀芯与套筒之间的摩擦力，进而加剧阀芯与套筒之间的磨损，可能引发阀芯动作卡滞并使阀芯和套筒的工作寿命缩短；当阀门开度小于40%时，调整节流窗口周向布置方式对阀芯不平衡力矩的影响较小；当阀门开度大于40%时，通过调整节流窗口周向布置方式可以有效改变阀芯不平衡力矩；在相同条件下，通过将节流窗口周向布置不平衡度从0增大至0.5，可使阀芯不平衡力矩最大值减小22.10%，而阀门流量系数仅减小2.74%。研究结果有助于主给水调节阀及类似阀门的设计及优化。
Abstract: The main feed water regulating valve (MFWRV) installed in the secondary circuit of the nuclear power plant regulates the water level in the steam generator by controlling the feedwater flow. Therefore, the flow characteristics of MFWRV affect the operation safety and efficiency of the nuclear power plant. Firstly, the dimensionless unbalance degree δ of circumferential arrangement of throttling window was proposed, and the circumferential arrangement of throttling window of MFWRV was designed; secondly, the numerical simulation method verified by grid independence and flow experiment was used to analyze the velocity and pressure distribution characteristics of the flow field in the valve; finally, the influence of the unbalance degree of the circumferential arrangement of the throttling window on the unbalance torque of the valve core and the flow coefficient of the valve was discussed. The results showed that the uneven pressure distribution at the bottom of the valve core would produce unbalanced torque to the valve core, increase the friction between the valve core and the sleeve, and then aggravate the abrasion between the valve core and the sleeve, which might cause the action stagnation of the valve core and shorten the service life of the valve core and the sleeve; when the valve opening was less than 40%, adjusting the circumferential arrangement of the throttling window had little effect on the unbalanced torque of the valve core; when the valve opening was greater than 40%, the unbalanced torque of the valve core could be effectively changed by adjusting the circumferential arrangement of the throttling window; under the same conditions, by increasing the unbalance degree of the circumferential arrangement of the throttling window from 0 to 0.5, the maximum unbalance torque of the valve core could be reduced by 22.10%, while the flow coefficient of the valve could be reduced by only 2.74%. The research results are conductive to the design and optimization of MFWRV and similar valves.
收稿日期: 2020-12-29 出版日期: 2022-02-28
CLC:  TH 134  
基金资助: 国家自然科学基金资助项目（51875514）；浙江省重点研发计划资助项目（2019C01025，2021C01021）
通讯作者: 钱锦远（1988—），男，浙江慈溪人，副教授，硕士生导师，博士，从事流动控制机理与强化传热技术研究，E-mail：qianjy@zju.edu.cn，https：//orcid.org/0000-0002-5438-0833     E-mail: qianjy@zju.edu.cn
作者简介: 吴嘉懿（1993—），男，浙江嘉善人，博士生，从事高性能特种控制阀优化设计，E-mail：jiayi-wu@zju.edu.cn， https：//orcid.org/0000-0002-8376-1619；
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引用本文:

吴嘉懿, 岳阳, 李军业, 金志江, 钱锦远. 主给水调节阀节流窗口周向设计及其对流动特性的影响[J]. 工程设计学报, 2022, 29(1): 74-81.

WU Jia-yi, YUE Yang, LI Jun-ye, JIN Zhi-jiang, QIAN Jin-yuan. Circumferential design of throttling window of main feed water regulating valve and its influence on flow characteristics[J]. Chinese Journal of Engineering Design, 2022, 29(1): 74-81.

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https://www.zjujournals.com/gcsjxb/CN/10.3785/j.issn.1006-754X.2022.00.006    或    https://www.zjujournals.com/gcsjxb/CN/Y2022/V29/I1/74

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