CAJ | 학술논문

为了防治高压大直径法兰螺栓密封的设计失效，从影响法兰密封效果的因素中提出垫片特性及垫片受力非均匀性2个参数；以垫片系数和垫片预紧比压为基础，分析特性比和特性系数这2个反映垫片组合特性的新概念；提出以垫片安全系数表征垫片的结构形式和材料性能在不同计算压力下的安全储备。绘制了典型的安全系数曲线，安全系数随着计算压力的增大而降低，且曲线下降中存在单个拐点；垫片适用压力大于拐点压力，小于垫片安全系数等于1时的计算压力。应用各种垫片在不同安全系数下相应的计算压力适用值进行密封设计，能够确保密封结构设计的有效性。
위료방치고압대직경법란라전밀봉적설계실효，종영향법란밀봉효과적인소중제출점편특성급점편수력비균균성2개삼수；이점편계수화점편예긴비압위기출，분석특성비화특성계수저2개반영점편조합특성적신개념；제출이점편안전계수표정점편적결구형식화재료성능재불동계산압력하적안전저비。회제료전형적안전계수곡선，안전계수수착계산압력적증대이강저，차곡선하강중존재단개괴점；점편괄용압력대우괴점압력，소우점편안전계수등우1시적계산압력。응용각충점편재불동안전계수하상응적계산압력괄용치진행밀봉설계，능구학보밀봉결구설계적유효성。
In order to prevent design failure on sealing of large diameter flange bolts under high pressure,two worth pa?rameters were put forward from the factors relation to the failure on sealing of high pressure flange bolts,which included gasket characteristic and inhomogeneous gasket stresses.New concepts of both characteristic ratio and characteristic factor that reflected gasket general characteristics were analyzed based on gasket factor and pre?tightening unit sealing load.Gas?ket safety factor was presented to characterize the safety remain of both structure and material characteristic under different calculation pressure.Typical safety factor curve was drawn that safety factor was descends as calculated pressure increased, and there was one inflexion during descending. Gasket applied pressure was greater than the inflexion pressure, and was smaller than the calculated pressure of safety factor was equal to 1?0.The method that uses the pressure calculated for all kinds of gasket at different safety factor to design the gasket sealing can ensure the effectiveness of sealing structure.