Analysis and Improvement of Dynamic Characteristics of Lift Check Valves

doi:10.16183/j.cnki.jsjtu.2021.S2.018

Abstract

Abstract:

Aimed at the problem that lift check valves cannot fall back to the normal position, the dynamic simulation of unsteady flow in the process of opening and falling back are conducted by using PumpLinx, and the structure of the valve body is proposed and improved. The dynamic response and internal flow field distribution of the prototype and the improved check valves are obtained. The results show that the dynamic opening time and small gap falling time of the improved check valve are significantly reduced by more than 50% compared with those of the prototype. The four additional guide grooves of the improved check valve can promptly discharge the squeezed fluid from the valve core during dynamic opening, and can promptly supplement the fluid when it falls back, so that the fluid force, the pulsation, and the velocity oscillation are weakened, which can make the valve core stable without easy deflection in the dynamic process. Therefore, the check valve proposed can improve the flow stability and solve the problem that the check valve cannot fall back normally.

Key words: lift check valve, opening process, small gap falling process, dynamic characteristics, numerical simulation

CLC Number:

TH134

JIN Ge, FAN Min, ZHOU Zhendong, TAN Yong, ZHONG Xiaobo. Analysis and Improvement of Dynamic Characteristics of Lift Check Valves[J]. Journal of Shanghai Jiao Tong University, 2021, 55(S2): 110-118.

Figures/Tables 19

Fig.1

Fig.2

Tab.1

Fig.3

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

Fig.11

Tab.2

Fig.12

Fig.13

Fig.14

Fig.15

Fig.16

Fig.17

References 15

[1]	冯明. 轴流式止回阀关闭时瞬态动力分析[D]. 兰州: 兰州理工大学, 2016.
	FENG Ming. Axial flow check valve is closed when the transient dynamic analysis[D]. Lanzhou: Lanzhou University of Technology, 2016.
[2]	沈捷美, 张逸芳, 孙雪萍. 核电站用核级止回阀的设计[J]. 流体机械, 2010, 38(3): 43-47.
	SHEN Jiemei, ZHANG Yifang, SUN Xueping. Shallow talk the design of classified DUO check valve for use in nuclear power station[J]. Fluid Machinery, 2010, 38(3): 43-47.
[3]	赵飞, 符杰, 宋文武, 等. 七流道球型止回阀的结构设计及性能分析[J]. 排灌机械工程学报, 2013, 31(8): 708-712.
	ZHAO Fei, FU Jie, SONG Wenwu, et al. Structural design and performance research of seven-channel spherical check valve[J]. Journal of Drainage and Irrigation Machinery Engineering, 2013, 31(8): 708-712.
[4]	祝太富, 邱磊, 傅仁浦, 等. 核级升降式止回阀改进研究[J]. 设备管理与维修, 2020(17): 78-79.
	ZHU Taifu, QIU Lei, FU Renpu, et al. Improvement of nuclear lift check valve[J]. Plant Maintenance Engineering, 2020(17): 78-79.
[5]	杨春蕾, 朱仁传, 缪国平, 等. 基于RANS和DES法船体绕流模拟及不确定度分析[J]. 上海交通大学学报, 2012, 46(3): 430-435.
	YANG Chunlei, ZHU Renchuan, MIAO Guoping, et al. Uncertainty analysis in CFD for flow simulation around ship using RANS and DES[J]. Journal of Shanghai Jiao Tong University, 2012, 46(3): 430-435.
[6]	刘梦瑶. 核电止回阀启闭过程中的复杂流及结构特性研究[D]. 镇江: 江苏大学, 2020.
	LIU Mengyao. Study on complex flow and structural characteristics during the opening and closing of a nuclear check valve[D]. Zhenjiang, China: Jiangsu University, 2020.
[7]	YANG Q, ZHANG Z G, LIU M Y, et al. Numerical simulation of fluid flow inside the valve[J]. Procedia Engineering, 2011, 23:543-550. doi: 10.1016/j.proeng.2011.11.2545 URL
[8]	BORGHI M, MILANI M, PAOLUZZI R. Transient flow force estimation on the pilot stage of a hydraulic valve[J]. Fluid Power Systems & Technology Division, 1998, 5:157-162.
[9]	TILL L T, WENDEL G. Application of computational fluid dynamics analysis in improving valve design[J]. SAE Transactions, 2002, 111:244-248.
[10]	陈五星, 谭术洋, 李毅, 等. CFX仿真分析技术在止回阀阀板抖动故障处理中的应用[J]. 流体机械, 2013, 41(6): 50-53.
	CHEN Wuxing, TAN Shuyang, LI Yi, et al. CFX simulation analysis technology and its usage in the malfunction process of disc wobble[J]. Fluid Machinery, 2013, 41(6): 50-53.
[11]	冯章俊. 对冲式止回阀动态特性分析[D]. 哈尔滨: 哈尔滨工程大学, 2009.
	FENG Zhangjun. Analysis on dynamic characteristics of reverse check valve[D]. Harbin: Harbin Engineering University, 2009.
[12]	王安麟, 吴小锋, 周成林, 等. 基于CFD的液压滑阀多学科优化设计[J]. 上海交通大学学报, 2010, 44(12): 1767-1772.
	WANG Anlin, WU Xiaofeng, ZHOU Chenglin, et al. Multidisciplinary optimization of a hydraulic slide valve based on CFD[J]. Journal of Shanghai Jiao Tong University, 2010, 44(12): 1767-1772.
[13]	SONG X G, CUI L, CAO M S, et al. A CFD analysis of the dynamics of a direct-operated safety relief valve mounted on a pressure vessel[J]. Energy Conversion and Management, 2014, 81:407-419. doi: 10.1016/j.enconman.2014.02.021 URL
[14]	余武江, 王海洲, 陈二锋, 等. 单向阀三维动态流场稳定性仿真研究[J]. 火箭推进, 2015, 41(1): 82-89.
	YU Wujiang, WANG Haizhou, CHEN Erfeng, et al. Research on three-dimensional dynamic flow stability of check valve[J]. Journal of Rocket Propulsion, 2015, 41(1): 82-89.
[15]	李梦科. 轴流式止回阀启闭过程分析及减阻设计[D]. 兰州: 兰州理工大学, 2020.
	LI Mengke. Analysis of opening and closing process of axial flow check valve and design of drag reduction[D]. Lanzhou: Lanzhou University of Technology, 2020.

类型	开启时间/s
原型	0.2481
改进型	0.1163

类型	关闭时间/s
原型	0.0117
改进型	0.0051