Effect of Liner in a Bellow using ANSYS software
Author(s):
Viraj Nileshkumar Kakadia, Shailesh Govindbhai Goyani
Keywords:
bellow, ANSYS, collar, structural analysis, liner, elastic material.
Abstract
The flexible part of an expansion joint consisting of one or more convolutions and the finish tangent with the ratio of the length of the bellows to the diameter of the bellows should be less or equal to three with no more than five plies. Bellows are one of the most effective energy absorbing components for an engineering system. Bellows have a function to absorb the regular or irregular expansion and contraction in the piping system, it is widely used as the element of expansion joint in the various piping system, aerospace, microelectromechanical and industrial system. Bellows are unique structures that require high strength as well as excellent flexibility. The most industrial piping system often suffers extreme deformation, displacement, heat expansion, vibration, and other causes are accountable for the failure. The failure of bellows extension joints made of SS 304 has been analysed. Overpressure, Vibration of steam in piping is accountable for the failure. After complete scrutiny of the bellows, we found that wrong design data are presumed at the time of bellows fabricating, and finally, these bellows are failed within one year of service. Based on these design data, we have improved the design and its re-design the metal expansion bellows by using EJMA code and FEA simulation. To avoid bellows failure possibilities, we have to provide liner in the bellows. Further, it has many benefits such as: to make sure smooth flow of media, minimize friction losses, minimize resonant vibration caused by high flow velocity, decrease the effect of turbulent flow upstream of the expansion joint, prevent erosion of the bellows wall from chemical and abrasive attack, reduce the temperature of the bellows in high-temperature application. In this work, a finite element analysis (FEA) of bellows anticipated.In this paper, for the validation of the software results and EJMA design calculated results bellows with optimisation result.
Article Details
Unique Paper ID: 148472

Publication Volume & Issue: Volume 6, Issue 2

Page(s): 152 - 157
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