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사출성형기 유압시스템의 특성 검토를 위한 해석 모델 개발
장주섭(J. S. Jang) 유공압건설기계학회 2011 유공압건설기계학회 학술대회논문집 Vol.2011 No.6
Injection molding machine is the assembly of many kinds of mechanical and fluid power part and electro-electronic control system. From in these, fluid power is a part where becomes the first core of this machine. Fluid power systems of injection molding machine are modelled and analyzed using a commercial program AMESim. The interpretation model which is detailed about the parts applied a publishing catalog data. Sub system models which is divided according to functional operation are made and its analysis results shows how design parameters work on operational characteristics like displacement, pressure, flow rates at each node and so on. Total fluid power circuit model is also made and analyzed. The results made by analysis will be used design of fluid power circuit of injection molding machine.
Matlab GUI를 활용한 Gerotor 치형 설계 도구 개발
장주섭(J. S. Jang) 유공압건설기계학회 2010 유공압건설기계학회 학술대회논문집 Vol.2010 No.6
A geortor type pump is widely used in lubrication and actuator systems. Especially the pump is an essential machine element of an automotive engine to feed lubrication oil and power source of automatic transmission. A gerotor is a planar mechanism consist of a pair of rotor and circular tooth of stator assembly which forms a closed space. However, related industries do not have necessary technology to design and optimize the pump and paid royalties of gerotor profile on an advanced company. Also, gerotor profiles with setting design parameter have not been sufficiently analyzed from a theoretical view. Therefore, it is very difficult for designer to decide the specifications of the gerotor profiles, and calculation and fluctuation of flow rate is not yet confirmed. In this study, theoretical analyses and optimal design of the gerotor profiles have been performed numerical method by mathematical base. An automated design system of the tooth profile has been developed through MATLAB GUI Program considering various design parameters.
이정민(J.M. Lee),김동명(D.M. Kim),정광식(K.S. Jeoung),한상택(S.T. Han),정원지(W.J. Jung),장주섭(J.S. Jang) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11
In this study, we develop analytical model of the load-sensing valve and analyze the system characteristics. In order to analyze characteristics of the pressure and flow and flow sharing of the load-sensing valve, test was performed on valve and vehicle. The authors studied the reliability of the analysis model by confirming the similarity of the analysis results and the test results before analyzing the characteristics of the system. Under the vehicle load conditions, The authors was performed evaluating effectiveness of the specific operation of the excavator.
박성수(S. S. Park),장주섭(J. S. Jang),김동명(D. M. Kim),정민영(M. Y. Jung),전호영(H. Y. Jeon),임광호(K. H. Lim) 유공압건설기계학회 2017 유공압건설기계학회 학술대회논문집 Vol.2017 No.11
This study is a first step to reduce the surge pressure and it has an one purpose. The purpose is that developing an analysis model which can closely analyze the hydraulic circuit and be used in design. For development of analysis model, SimulationX is used which is one of commercial program. The study progress methods is as follows. By analyzing the structure and operation mechanism of each part constituting hydraulic system of the pump truck and refering it’s parameters, develop of the single component model. Assemble the developed single component model and make up overall analysis model. By comparing how much developed model is simmilar with actual system’s test results, gain reliability of analysis model.
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.