작동 토크를 평가 함수로 하는 사중편심 버터플라이밸브 설계 파라미터 민감도 분석

Abstract

Because of industrial development, industrial facilities are becoming more complex and diversified. Plant industries are focused onproductivity improvement, cost reduction, and product uniformity by simplifying production processes using automated control. Furthermore, plantindustries require higher pressures and temperatures to improve energy efficiency. For this reason, the valves used in plants are operated underharsh conditions. Globe valves and gate valves are mainly used for high pressure these days. However, these valves have various problems,including low maintainability and high cost, due to structural problems. Therefore, butterfly and ball valve applications are increasing in industrialplants. This paper suggests a quadruple-offset butterfly valve that is applicable to bi-direction use, and the principle design parameters aresuggested. The selected design parameters are an eccentric flange center line and shaft centerline(Offset 1), an eccentric seat centerline and discshaft centerline(Offset 2), the angle between the flange centerline and seat wedge angle(Offset 3), the angle between the vertical direction of the discshaft centerline and seat centerline(Offset 4), and the seat engagement angle. To analyze the interaction effect of the design parameters, ANOM andANOVA were performed with an orthogonal array. The parameters were found to have effects in the following order: Offset 2, Offset 1,engagement angle, Offset 3, and Offset 4. The interaction between the parameters was insignificant.