http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김양석(Y.S. Kim),이도환(D.H. Lee),김대웅(D.W. Kim),박성근(S.K. Park),홍승열(S.Y. Hong) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
In spite of its simple design, structure and operating mechanism, swing check valves are one of the<br/> critical components which adversely affect the safety of the nuclear power plants if they fail to<br/> function properly. Therefore, it is important to evaluate the performance condition of the swing check<br/> valves in safety-related systems. The performance characteristics of swing check valves include opening<br/> characteristics, the minimum required flow velocity, the pressure drop at design flow, the disc stability,<br/> and the effect of the upstream disturbances. Among factors to identify the performance of a swing<br/> check valve, a method to evaluate the opening characteristics and the minimum required flow velocity,<br/> which guarantees to fully open the disc and hold the disc without motion, are presented to determine<br/> the operating region of the swing check valve, such as stable, tapping, or oscillation. Based on the<br/> determined operating region and opening characteristics, the simple methods of wear and fatigue<br/> analyses of the specific parts of the valve are also described.
고차압에서 운전되는 모터구동게이트밸브의 부하율 향상 방안
김대웅(D.-W. Kim),박성근(S.-G. Park),홍승열(S.-Y. Hong),유성연(S.-Y.Yooh) 한국유체기계학회 2003 유체기계 연구개발 발표회 논문집 Vol.- No.-
This paper presents the method of Rate of Loading(ROL) improvement for the Motor Operated Gate Valve operating in high differential pressure condition. The character of ROL and Stem Factor is analyzed. Static test and dynamic test were performed and acquired the diagnosis signal for the valve closing stroke. The result of this study is the modification of stem factor is very important factor for the ROL improvement. In order to obtain the same value of dynamic test thread friction coefficient, stem and stem nut should be combined appropriately.