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김동명(D. M. Kim),장주섭(J. S. Jang),김태인(T. I. Kim),이종찬(J. C. Lee),유충목(C. M. Yoo),한성민(S. M. Han),남용윤(Y. Y. Nam),서자호(J. H. Seo),박진선(J. S. Park) 유공압건설기계학회 2016 유공압건설기계학회 학술대회논문집 Vol.2016 No.6
Recently, an electronic hydraulic valves on behalf of the main control valve is widely used. The electric hydraulic valve is one of the main control valve to control the various actuators in the hydraulic system(This valve was a cartridge type of a 2port/2way and EHPV(Electro hydraulic proportional valve) and the main poppet is composed of a single valve. A main poppet in the electric hydraulic valve is determine to main flow line, which includes the ability to restrict or permit the reverse. Supply flow is proportionally controlled by the inner pilot pressure and the pilot pressure is controlled by the current of input EHPV. In general, pilot operated valves are supplied to the control pressure from the outside. However, this valve is supplied with pilot pressure from the inside. Therefore, the design variables of the main valve poppet and EHPV are closely related to each other. It was carefully analyzed the valve structure and how it works to improve the performance of the valve. We developed an analytical model considering the geometric shape and spring stiffness. The test results and the analysis confirmed the accuracy of the analysis model by comparing the results, and the performance enhancement study was performed using the analysis model. We examined the characteristics of the control range and the power loss by using the analysis model.