http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Investigation of Reliability of an Electro-Hydraulic Pressure Reducing Valve through Experiments
H. A. Khan(칸 하룬 아흐마드),S. N. Yun(윤소남),J. W. Park(박정우),Y. B. Ham(함영복),J. H. Park(박중호) 유공압건설기계학회 2020 유공압건설기계학회 학술대회논문집 Vol.2020 No.7
In this study, an electro-hydraulic proportional pressure reducing valve (EPPR valve) was tested to determine its reliability. The valve was subjected to a sinusoidal input voltage signal at a certain frequency. The output of the valve was sensed through a pressure transducer and recorded on a data acquisition system. The valve characteristics for different number of cycles are presented in this study. The results explain the durability or reliability of the valve for a certain number of operation cycles. The valve behavior was found to be consistent with time. Both static as well as dynamic characteristics of the valve were considered and documented. Pressure reducing valves are to control the pressure in a hydraulic circuit depending on application. In most applications, they are turned on and off frequently. This motivated us to determine the reliability or durability of such valves by turning them on and off continuously and monitoring the static and dynamic behavior.
Modeling and Experimental Performance Results of a Three-stage Proportional Flow Control Valve
H. A. Khan(칸 하룬 아흐마드),C. N. Kang(강창남),E. A. Jeong(정은아),S. N. Yun(윤소남) 유공압건설기계학회 2017 유공압건설기계학회 학술대회논문집 Vol.2017 No.11
This work was carried out to simulate and validate the developed mathematical model. The results from the simulation were then compared with the results from experiments. The main goal of this work was to validate the theoretical model developed by the equations from fluid dynamics. Two aspects of the model, which are investigated, include the flow rate characteristics and the time response characteristics of the valve. Flow rate and time response are one of the primary indicators of the behavior of a hydraulic valve because it affects the working of a hydraulic valve and hence, the overall circuitry of the hydraulic system which the valve operate in. In short, we can say that the purpose of this study was to observe how accurate our mathematical model is under certain conditions of operation.