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

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タイトル別名
  • Studies on the Wet Vacuum Pump : 1st Report, The Effects of Eccentricity of the Nash Type Casing
  • エキ フウジ シキ ポンプ ノ ケンキュウ 1

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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 (qe), 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 (Hs maxt, Ust) exists on the curve showing the relation between the tip velocitv of the runner (Ua) and the maximum degree of vacuum (Hs max) adopted under qo, and the pump efficiency (ηis) becomes maximum under the velocitr increased a little from Uat (3) The most effective eccentricitt may be concluded as e/γa=0.20∼0.22, judging synthetically from the suction performance, effciency, etc.

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