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On-line Access: 2023-12-29

Received: 2023-02-02

Revision Accepted: 2023-05-11

Crosschecked: 2024-01-04

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Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Zhi-jiang Jin

https://orcid.org/0000-0002-8063-709X

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Journal of Zhejiang University SCIENCE A 2023 Vol.24 No.12 P.1096-1105

http://doi.org/10.1631/jzus.A2300061


Solid-liquid flow characteristics and sticking-force analysis of valve-core fitting clearance


Author(s):  Jin-yuan QIAN, Jiaxiang XU, Fengping ZHONG, Zhenhao LIN, Tingfeng HUA, Zhijiang JIN

Affiliation(s):  Institute of Process Equipment, College of Energy Engineering, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   jzj@zju.edu.cn

Key Words:  Solid-liquid flow characteristics, Valve core, Sticking force, Euler-Euler model


Jin-yuan QIAN, Jiaxiang XU, Fengping ZHONG, Zhenhao LIN, Tingfeng HUA, Zhijiang JIN. Solid-liquid flow characteristics and sticking-force analysis of valve-core fitting clearance[J]. Journal of Zhejiang University Science A, 2023, 24(12): 1096-1105.

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author="Jin-yuan QIAN, Jiaxiang XU, Fengping ZHONG, Zhenhao LIN, Tingfeng HUA, Zhijiang JIN",
journal="Journal of Zhejiang University Science A",
volume="24",
number="12",
pages="1096-1105",
year="2023",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2300061"
}

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%T Solid-liquid flow characteristics and sticking-force analysis of valve-core fitting clearance
%A Jin-yuan QIAN
%A Jiaxiang XU
%A Fengping ZHONG
%A Zhenhao LIN
%A Tingfeng HUA
%A Zhijiang JIN
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%D 2023
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2300061

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T1 - Solid-liquid flow characteristics and sticking-force analysis of valve-core fitting clearance
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A1 - Zhenhao LIN
A1 - Tingfeng HUA
A1 - Zhijiang JIN
J0 - Journal of Zhejiang University Science A
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A2300061


Abstract: 
External contamination particles or wear particles corroded by a valve body are mixed into the fluid. As a result, when the fluid enters the fitting clearance of the valve core, it can cause an increase in resistance and lead to sticking failure of the valve core. This paper analyzes solid-liquid flow characteristics in fitting clearances and valve-core sticking based on the euler-Euler model, using a typical hydraulic valve as an example. The impact of particle concentration and diameter on flow characteristics and valve-core sticking force was analyzed. The highest volume fraction of particles was in the pressure-equalizing groove (PEG), with peak values increasing as the particle diameter increased. The sticking force increased with increasing particle concentration. When the particle diameter was 12 μm, the sticking force was the largest, making this the sensitive particle diameter. Particle distribution and valve-core sticking force were compared for oval, rectangular, and triangular PEGs. The fluid-deflection angles in oval and rectangular PEGs were larger, and their values were 32.83° and 39.15°, respectively. The fluid-deflection angle in the triangular PEG was relatively small, less than 50% that of the oval or rectangular PEGs. The particle-volume-fraction peaks in oval, rectangular, and triangular PEGs were 0.0317, 0.0316, and 0.0312, respectively. The sticking forces of oval, rectangular, and triangular PEGs were 4.796, 4.802, and 4.757 N, respectively when the particle diameter was 12 μm. This work provides a reference for design and research aimed at reducing valve-core sticking.

阀芯间隙固液两相流动特性及卡滞研究

作者:钱锦远1,许家祥1,钟丰平2,林振浩1,华霆峰1,金志江1,3
机构:1浙江大学,能源工程学院,化工机械研究所,中国杭州,310027;2浙江省特种设备科学研究院,中国杭州,310009;3浙江大学,温州研究院,中国温州,325036
目的:阀门在运行期间,如有外部污染颗粒或阀内元件自身腐蚀的磨损颗粒混入流体中,其随着流体进入阀芯配合间隙从而导致阀芯所受阻力增大,容易出现阀芯卡滞现象。因此,本文旨在分析阀芯配合间隙内颗粒流动特性及其引起的卡滞问题,研究颗粒浓度、直径和均压槽形状对阀芯卡滞力的影响,为抑制阀芯卡滞方法的研究提供参考。
创新点:1.基于Euler-Euler方法建立固液两相流模型,获得阀芯配合间隙内的固液两相流动特性;2.研究颗粒浓度和直径对流动特性及阀芯卡滞力的影响,确定敏感颗粒直径;3.揭示不同均压槽结构对阀芯卡滞力的影响规律。
方法:1.基于Euler-Euler固液两相流模型,分析阀芯配合间隙内的固液两相流动特性;2.通过数值模拟方法研究颗粒浓度和直径对流动特性及阀芯卡滞力的影响;3.分析椭圆形、矩形和三角形均压槽结构对颗粒分布及阀芯卡滞力的影响。
结论:1.颗粒在均压槽中的体积分数最高,并且峰值也随着颗粒直径的增大而增大,卡滞力随着颗粒浓度的增加而增加。2.随着颗粒直径的增大,卡滞力先增大后减小,当颗粒直径为12 μm时,卡滞力最大,为敏感颗粒直径。3.椭圆形和矩形均压槽中的流体偏转角较大,分别为32.83°和39.15°;三角形均压槽中的流体偏转角相对较小,是椭圆形或矩形均压槽的50%左右;矩形均压槽中的颗粒体积分数最高,椭圆形均压槽中次之,三角形均压槽中最低,其峰值分别为0.0317、0.0316和0.0312;当颗粒直径为12 μm时,椭圆形、矩形和三角形均压槽的卡滞力分别为4.796、4.802和4.757 N。因此,在阀芯上选择一个流体偏转角小、底部储存污染颗粒能力强的三角形均压槽,有利于缓解阀芯卡滞现象。

关键词:固液流动特性;阀芯;卡滞力;Euler-Euler模型

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