グランドパッキンによるシール特性の研究 : 第3報, パッキンの応力緩和挙動とそのモデル化

概要

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Tightening Pressure of gland packings decreases with an increasing time due to stress relaxation. From an engineering point of view, the prediction of stress relaxation of packings is very important, because the sealing characteristics are very much influenced by the tightening pressure. In this paper, the stress relaxation of asbestoid and graphitic packings after tightening has been experimentally investigated. The tightening pressure of packings decreases, rapidly just after tightening and gradually slows down with increasing time, and finally reaches an asymptotic value. The magni-tude of stress relaxation can be reduced very much by cyclic tightening. A visco-elastic model for the analysis of the stress relaxation has also been proposed. The numerical simulation by the model could well duplicate the experimental results of stress relaxation of packings.
一般社団法人日本機械学会の論文
1989-01-25