低圧式ガス溶接・切断吹管の性能に関する研究(第 4 報)

概要

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When the oxygen gas was supplied to the injecting part of the low pressure type gas welding or cutting torch, without acetylene, the low pressure region was grown by the suction of the oxygen jet. Authors regarded the pressure (P_4) in the injecting part as a expression of the character which the injector worked to acetylene flow in the welding or cutting. Experiments were investigated about influence of the some dimension in the injector parts on the P_4-pressure. In the previous report, authors illustrated the role of the injecting part. In this report, continously, experiment was performed about effects of the some demension in the mixing part on the suction. Consequences of the experiment are as follows; (1) When oxygen jet pass through the mixing part, suction which caused the oxygen jet is developed efficiently. (2) To get the most effective suction, the diameter of the oxygen jet is required to come, near the diameter of the mixing part. (3) The lowest P_4-pressure was measured in the next combinations of the main dimension in the injector parts; (i) D=1.4mmφ, L=6 or 12mm to d=0.99mmφ and 1=1.8mm (ii) D=1.2mmφ, L=6mm to d=0.60mmφ and 1=1.8mm (iii) D=1.2mmφ, L=6mm to d=0.46mmφ and 1=1.8mm
社団法人溶接学会の論文
1964-08-25