常规法兰结构密封性能对比研究.PDFVIP

434023 TB42 A doi 10.3969/j.issn.1006-0316.2015.10.006 (2015) 10 0022 05 Comparative research on the property of sealing about the common structure of flange LIAO JianminZHOU SizhuLI Ning ( Institute of Strength and Vibration of Mechanical Structure, Yangtze University, Jingzhou 434023, China ) Abstract It introduces the advantage and disadvantage of the sealing property for four traditional structures of sealing. By the finite element method, the influence on contact pressure made of the surface of metal gasket though different pre-tightening force and operating pressure and flange rigidity is studied under four structures of sealing. The results showed that the sealing effect of sealing surface are increased by four structure of sealing (raising face sealing, mortise sealing, bump sealing, annular sealing); In the normal condition Compared to raising face sealing and mortise sealing, it is not sensitive to the axial force for raising face annular sealing and bump sealing, which the contact pressure is not weakened easily. In the flange connection on flat gasket, with enhanced flange rigidity, the contact area joined in sealing increase while the maximum contact pressure descend. The step increasing flange rigidity has no influence on the contact pressure in mid-location of sealing, and the pressure distribution on annular sealing is more evenly. Key words structure o