Abstract
In this paper, the piston type valve core and the unbalanced moment on its bottom are studied. To decrease the influence of non-common geometrical factors, a simplified model of the piston type globe valve is proposed in this study. Based on the computational fluid dynamics (CFD) method, the effects of different geometrical parameters on the unbalanced moment existing on the bottom of the valve core, which include the bending radius of the inlet flow channel, the diameter of the special-shaped pipe, and the height of the valve core, are studied. Finally, the effects of geometrical parameters on the unbalanced moment on the bottom of the valve core are clarified by correction and variation classification and provide a basis for further optimizing the structure of the piston type valve. The results show that the unbalanced moment decreases with the increase of the bending radius of the inlet flow channel, but increases with the increase of the diameter of the special-shaped pipe and the height of the valve core. Moreover, the relation between the unbalanced moment and flow rate is proposed.
概 要
目 的
活塞式阀芯底面受到的不平衡力矩, 不仅会让阀芯有倾覆的趋势, 甚至会造成阀杆和阀芯变形卡滞, 最终导致阀门内漏. 本文提出了活塞式截止阀的简化模型, 基于计算流体力学方法, 探究了入口流道弯曲半径、 异形管直径和阀芯高度等特征结构参数对阀芯底面不平衡力矩的影响机制, 为活塞式阀门结构的进一步优化提供了依据.
创新点
1. 建立了活塞式截止阀的简化模型, 研究简化模型特征结构参数对活塞式阀芯底面不平衡力矩的影响; 2. 对简化活塞式截止阀在不同入口流道弯曲半径、 异形管直径和阀芯高度下进行流动及阀芯受力分析。
方 法
1. 建立具有不同入口流道弯曲半径的简化活塞式截止阀的数值计算模型, 并比较分析入口流道弯曲半径对阀内速度以及阀芯受力情况的影响(图7~9); 2. 建立具有不同异形管直径的简化活塞式截止阀的数值计算模型, 并比较分析异形管直径对阀内压力以及阀芯受力情况的影响(图10~12); 3. 建立具有不同阀芯高度的简化活塞式截止阀的数值计算模型, 并比较分析阀芯高度对阀芯受力情况的影响(图13), 总结得出阀芯受到的合力矩与阀门流量之间的关系(图14).
结 论
1. 随着入口流道弯曲半径的增大, 阀芯底面受到的不平衡力矩逐渐减小; 在实际应用中, 可以通过适当增大阀门入口流道弯曲半径来减小不平衡力矩. 2. 随着异形管直径的增大, 阀芯底部的不平衡力矩略有增大; 在阀门的设计中, 可以忽略异型管直径对不平衡力矩的影响. 3. 阀芯高度增大, 出口流量随之增大, 加剧了阀芯底面力矩分布不平衡的现象.
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References
Amirante R, Catalano LA, Poloni C, et al., 2014. Fluiddynamic design optimization of hydraulic proportional directional valves. Engineering Optimization, 46(10):1295–1314. https://doi.org/10.1080/0305215X.2013.836638
Amirante R, Distaso E, Tamburrano P, 2016. Sliding spool design for reducing the actuation forces in direct operated proportional directional valves: experimental validation. Energy Conversion and Management, 119:399–410. https://doi.org/10.1016/j.enconman.2016.04.068
Frosina E, Senatore A, Buono D, et al., 2016. A mathematical model to analyze the torque caused by fluid-solid interaction on a hydraulic valve. Journal of Fluids Engineering, 138(6):061103. https://doi.org/10.1115/1.4032295
Frosina E, Senatore A, Buono D, et al., 2017. A modeling approach to study the fluid-dynamic forces acting on the spool of a flow control valve. Journal of Fluids Engineering, 139(1):011103. https://doi.org/10.1115/1.4034418
Han MX, Liu YS, Wu DF, et al., 2017. A numerical investigation in characteristics of flow force under cavitation state inside the water hydraulic poppet valves. International Journal of Heat and Mass Transfer, 111:1–16. https://doi.org/10.1016/j.ijheatmasstransfer.2017.03.100
Han MX, Liu YS, Wu DF, et al., 2018. Numerical analysis and optimisation of the flow forces in a water hydraulic proportional cartridge valve for injection system. IEEE Access, 6:10392–10401. https://doi.org/10.1109/ACCESS.2018.2805684
Hou CW, Mu J, Li WQ, et al., 2019. Transient simulation on unbalanced torque of piston type valve cores during dynamic motion. Proceedings of the ASME-JSMEKSME 8th Joint Fluids Engineering Conference, No. V03AT03A018. https://doi.org/10.1115/AJKFluids2019-4733
Jin ZJ, Qiu C, Jiang CH, et al., 2020. Effect of valve core shapes on cavitation flow through a sleeve regulating valve. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 21(1):1–14. https://doi.org/10.1631/jzus.A1900528
Kourakos V, Rambaud P, Buchlin JM, et al., 2013. Flowforce in a safety relief valve under incompressible, compressible, and two-phase flow conditions (PVP-2011-57896). Journal of Pressure Vessel Technology, 135(1):011305. https://doi.org/10.1115/1.4006904
Lin Z, Wang HJ, Shang ZH, et al., 2015. Effect of cone angle on the hydraulic characteristics of globe control valve. Chinese Journal of Mechanical Engineering, 28(3):641–648. https://doi.org/10.3901/CJME.2015.0313.030
Lisowski E, Filo G, Rajda J, 2018. Analysis of flow forces in the initial phase of throttle gap opening in a proportional control valve. Flow Measurement and Instrumentation, 59:157–167. https://doi.org/10.1016/j.flowmeasinst.2017.12.011
Manring ND, Zhang SS, 2012. Pressure transient flow forces for hydraulic spool valves. Journal of Dynamic Systems, Measurement, and Control, 134(3):034501. https://doi.org/10.1115/1.4005506
Nguyen QK, Jung KH, Lee GN, et al., 2020. Experimental study on pressure distribution and flow coefficient of globe valve. Processes, 8(7):875. https://doi.org/10.3390/pr8070875
Qian JY, Liu BZ, Lei LN, et al., 2016a. Effects of orifice on pressure difference in pilot-control globe valve by experimental and numerical methods. International Journal of Hydrogen Energy, 41(41):18562–18570. https://doi.org/10.1016/j.ijhydene.2016.08.070
Qian JY, Liu BZ, Jin ZJ, et al., 2016b. Numerical analysis of flow and cavitation characteristics in a pilot-control globe valve with different valve core displacements. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 17(1):54–64. https://doi.org/10.1631/jzus.A1500228
Simic M, Herakovic N, 2015. Reduction of the flow forces in a small hydraulic seat valve as alternative approach to improve the valve characteristics. Energy Conversion and Management, 89:708–718. https://doi.org/10.1016/j.enconman.2014.10.037
Wang H, Quan L, Huang JH, et al., 2019. Reduction of steady flow torques in a single-stage rotary servo valve. Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 233(4): 718–727. https://doi.org/10.1177/0954408918793402
Wang HH, Xu H, Zhang YH, et al., 2019. Design of a bio-inspired anti-erosion structure for a water hydraulic valve core: an experimental study. Biomimetics, 4(3):63. https://doi.org/10.3390/biomimetics4030063
Wang YP, Zhu CN, Zhang G, et al., 2020. Numerical analysis to the effect of guiding plate on flow characteristics in a ball valve. Processes, 8(1):69. https://doi.org/10.3390/pr8010069
Zhang JH, Wang D, Xu B, et al., 2018. Experimental and numerical investigation of flow forces in a seat valve using a damping sleeve with orifices. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 19(6):417–430. https://doi.org/10.1631/jzus.A1700164
Zhao JH, Zhou SL, Lu XH, et al., 2015. Numerical simulation and experimental study of heat-fluid-solid coupling of double flapper-nozzle servo valve. Chinese Journal of Mechanical Engineering, 28(5):1030–1038. https://doi.org/10.3901/CJME.2015.0417.045
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Jin-yuan QIAN designed the research. Jin-yuan QIAN and Cong-wei HOU processed the corresponding data. Jin-yuan QIAN and Juan MU wrote the first draft of the manuscript. Zhi-jiang JIN helped to organize the manuscript. Juan MU revised and edited the final version.
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Jin-yuan QIAN, Juan MU, Cong-wei HOU, and Zhi-jiang JIN declare that they have no conflict of interest.
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Project supported by the National Natural Science Foundation of China (No. 51805470), the Zhejiang Provincial Key Research & Development Project (No. 2019C01025), and the Youth Funds of the State Key Laboratory of Fluid Power and Mechatronic Systems (Zhejiang University) (No. SKLoFP-QN-1801), China
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Qian, Jy., Mu, J., Hou, Cw. et al. A parametric study on unbalanced moment of piston type valve core. J. Zhejiang Univ. Sci. A 22, 265–276 (2021). https://doi.org/10.1631/jzus.A2000582
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DOI: https://doi.org/10.1631/jzus.A2000582