タービン軸材の加熱計測試験に関する研究 : 第3報, A形, C′形およびD形たわみの成因について

概要

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The causes of type A, C' and D deflections in five basic deflections which are observed in the heat indication test of steam turbine shafts were clarified experimentally, using a model apparatus of heat indication test shown in the 1st reports. These types of deflection have their origin in the asymmetric thermal emissivity of rotor surface, which includes the following items : (1) Dust or contamination due to cutting oil, mud, paint and others in manufacturing processes of rotors. (2) Conditions of scale before the test, of growth of scale and de-scaling during the test. (3) Roughness along the rotor surface (considering the vibration mark of cutting tool). There two kinds of asymmetry of surface thermal blackness, one is improved and the other one is hardly improved by short-time tempering or by heating during the test. It is found that type A, C' and D deflections have no difference in the cause of occurrence only excepting their stage of appearence during the test.
一般社団法人日本機械学会の論文
1962-01-25