Numerical Simulation and Experimental Research of Flow Force in Deflector Jet Valve

Jing Li; Hao Yan; Cunkun Cai; Lei Li; Yukai Ren

doi:10.5293/IJFMS.2020.13.3.595

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자료유형: 학술저널

저자정보: Jing Li (Beijing Jiaotong University) Hao Yan (Beijing Jiaotong University) Cunkun Cai (Beijing research institute of precision electromechanical control equipment) Lei Li (Beijing Jiaotong University) Yukai Ren (Beijing Jiaotong University)

저널정보: 한국유체기계학회 International Journal of Fluid Machinery and Systems International Journal of Fluid Machinery and Systems Vol.13 No.3

발행연도: 2020.9

수록면: 595 - 605 (11page)

DOI: 10.5293/IJFMS.2020.13.3.595

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In most servo valve control systems, the flow force is a critical factor influencing the control precision of the servo valve, especially in the pilot stage. In this paper, the generating mechanism of the flow force in the pilot stage is analyzed, showing that it is mainly generated by the impacting jet. Then, a three-dimensional numerical model of the deflector servo valve is built, and the pressure distribution on the deflector is simulated under different offsets. Due to the complicated structure of the deflector jet valve, it is impossible to measure the flow force directly. Thus, an indirect method is proposed for the flow force measurement. Compared with the theoretical analysis and the simulation results, it is found that the indirect method can be an effective way to get a reliable relationship between the flow force and the deflector offsets. The experiment shows the flow force increases linearly with the deflector offsets and the growth rate is 7.32 × 10<SUP>-4</SUP> N/㎛. Meanwhile, the maximum flow force can reach 0.036 6N in working condition.

#Deflector jet valve #Flow force #Polit stage #Numerical simulation #Experimental equipment

참고문헌 (17)

참고문헌 신청

Dong X. / 1999 / Flows and flow characteristics of spool valve 1999(4):51~56

Wu J B. / 2011 / Steady-state flow force simulation and analysis of oblique-inlet spool valves / Journal of Huazhong University of Science and Technology (Natural Science Edition) 39(11):109~111

L Pace / 2013 / Comparative analysis of a hydraulic servo-valve / International Journal of Fluid Power 14(2):53~62

Aung N Z. / 2014 / A numerical study of cavitation phenomenon in a flapper-nozzle pilot stage of an electrohydraulic servo-valve with an innovative flapper shape / Energy Conversion & Management 77(110):31~39

Aung N Z. / 2014 / CFD analysis of flow forces and energy loss characteristics in a flapper–nozzle pilot valve with different null clearances / Energy Conversion & Management 83(7):284~295

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