Flexibility Analysis of the Welded Metal Bellows of Mechanical Seal

Abstract

In this study, the stiffness and the flexibility of welded metal bellows of mechanical seal is studied numerically by changing the number of bellows membrane and the loading condition. The relationship between the number of membrane and the displacement, the stress and the flexibility are analyzed. For further improved the axial displacement, overall stiffness and the flexibility of the welded metal bellows membrane, the finite element analysis are conducted. The numerical results show that the maximum stress keeps constant value with increasing the number of bellows membrane under the same loading condition. The relationship between number of bellows membrane and stiffness as will as the flexibility are obtained. It is shown, stiffness is decreased and flexibility is increased with increasing of the number of the bellows membrane.

Finite element analysis of axial stiffness of S-shaped welded metal bellows

“…M. Hamada [6] obtained information on the design of bellows through experimental studies and gave the appropriate design criteria. Mamtimin Geni [7] used a 1/4 finite element model based on the symmetry of the bellows and analyzed it under different numbers of diaphragm sets and loading conditions. K. Tsukimori [8] found that the bellows have a unique buckling deformation due to their special shape and analyzed the buckling deformation and buckling criterion of bellows under pressure load.…”