燃料油附着による直流機の発火について(日本航海学会第15回講演会)

抄録

When the fuel oil adheres on the commutator of the D.C. machines, it happens sometimes that the fuel gas take fire, if the number of revolution and the brush current densety of the D.C. machine have some values. For such a case, the danger range to the ignition of the fuel oil, were obtained by experiments. The results of our experiments showed that the D.C. machine is the most dangerous to the fuel ignition when it has low speed and large brush current density. Further more by the theoretical investigation auther ascertained that the course of the fire at the engine room of a certaine ship was by the D.C. machine in such a danger range.