グランドパッキンによるシール特性の研究 : 第1報,パッキンの機械的性質の試験法と石綿系および黒鉛系パッキンによる実験

概要

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The leakage rate of fluid is strongly affected by the magnitude of the contact pressure between packing and the stem or stuffing-box. If the packing is tightened by a high gland load to prevent leakage, the friction between the stem and the packing becomes larger. From the practical viewpoint. the distribution of the contact pressure and the friction at any given gland pressure or at any given compressive displacement of the packing are required in order to make an analytical prediction. In making the first step toward analyzing the contact pressure and the friction for various combinations of packing, this paper describes the mechanical properties of various asbestoid and graphitic packing. A testing method to determine the normal to axial pressure ratio K, the coefficient of friction μ and the axial pressure-strain relation Pz-|ε_z| is presented. The experimental equations for these values, K, μ and e_z, are found as functions of the axial pressure P_z K=K_oP^a_z, μ=μ_oP^b_z, |ε_z|=E_oP^c_z, where K_o, a, μ_0, b, E_o and c are material constants.
一般社団法人日本機械学会の論文
1986-05-25