液封じ式ポンプの研究 : 第1報, ナッシュ形ケーシングの偏心量の影響について

概要

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In order to obtain the exact and stable characteristic curve of the wet vacuum pump, a system to control precisely the supplement of piston water is devised, and the comparative studies on the various eccentricities of the casing are performed experimentally. The experiment reveals the following : (1) The critical rate of supply water (q_e), required for the continuous characteristics, decreases with the increase of the speed of the runner, and with the decrease of the eccentricity of the casing. (2) The transition point (H_s max_t, U_<st>) exists on the curve showing the relation between the tip velocitv of the runner (U_a) and the maximum degree of vacuum (H_s max) adopted under q_o, and the pump efficiency (η_<is>) becomes maximum under the velocitr increased a little from U_<at> (3) The most effective eccentricitt may be concluded as e/γ_a=0.20〜0.22,judging synthetically from the suction performance, effciency, etc.
一般社団法人日本機械学会の論文
1964-05-25