Modeling of Casing Flange Bolt Connection and Analysis of Sealing Performance

Abstract

The oil leakage at the bolt connection of the combustion chamber casing flange can influence the service life and working performance, pollute the environment, and waste the oil.Based on the deflection deformation theory of cantilever beam, the analytical method is used to deduce the structural deflection deformation equation of bolted connection, and the sealing design method of optimized connection structure is established.The fine finite element model of the casing bolted connection is established in ANSYS to calculate the axial clearance of the flange joint surface under different load forms, and the implementation plan to strengthen the sealing performance of the connection is also proposed.Through numerical simulation, the sealing effect of the sealing ring of different thicknesses is analysed.The results show that the deduced equation can calculate the deformation of bolted connection structure under the load, and is suitable for sealing optimization of connection structure.The proposed scheme can solve the problem of oil leakage at the bolted connection of the combustion chamber casing flange.

Keywords

• casing
• bolted connection
• oil leakage
• axial clearance
• sealing performance