Bellows are used as the element of expansion joint. One of the problems in the piping system for industrial plants is the excessive deformation or displacement caused by heat expansion, vibration, non uniform subsidence of ground, etc. Bellows have functions to absorb regular or irregular expansion and contraction in such piping systems. The conventional bellows, however, have the problems: the difference in thickness between the crown and the root, unstable deformations, torsional deformation cannot be absorbed. In order to improve these problems, new type bellows, so called 'double convolution bellows' (DCB), were proposed. This new type bellows have convolutions in two directions; the first convolutions in longitudinal direction same as the conventional bellows, and the second convolutions added in lateral direction. Conventional bellows could be classified here as 'single convolution bellows' (SCB). This paper presents an extending studies on the behaviors of new type bellows (DCB) and conventional bellows (SCB) to examine the deformation behaviors under torsional loadings, to confirm the performance of the lateral convolution by FEM analysis, and the results are shown improvement in thickness distribution, instability and torsional flexibility.
Analysis of deformation behaviors in new type bellows with two-directional convolutions
High Pressure Technology, 1998, ASME/JSME Joint Pressure Vessels and Piping Conference, 1998 ; 107-112
ASME/PVP ; 371
1998
6 Seiten, 6 Quellen
Aufsatz (Konferenz)
Englisch