To reduce stress concentration at a branched section in a flow passage branching structure.
A flow passage branching structure 10 includes a main component 12 having a main hole 12a to which the internal pressure from internal fluid is applied, and a branched component 14 to be connected to the main component 12. The main hole 12a of the main component 12 is opened in an end wall face 12c of the main component 12. The branched component 14 has an end wall face 14d opposing an opening of the main hole 12a. Further, the branched component 14 has a plurality of branch holes 14a, 14b which are opened in an end wall face 14d of the branched component 14, communicated with the main hole 12a, and separated from each other while having the diameter smaller than that of the main hole 12a.
KOGA KAZUYA
HIROSE ATSUSHI
Eiichi Yamaguchi
Next Patent: ELECTRIC COMPRESSOR