| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection device which effectively prevents coking in a main fuel injection valve while having a structure that enables reduction of the radial dimension of the main fuel injection valve.SOLUTION: A fuel injection device (1) for a gas turbine combustor is provided with: a pilot fuel injection valve (3) disposed on an axis (C) of the fuel injection device; an annular main fuel injection valve (5) which encloses an outer periphery of the pilot fuel injection valve; and main fuel injection holes (21) which inject a fuel to the rear side in an axis direction. The main fuel injection valve (5) includes: a fuel passage formation body (15); an inner ring (17) disposed at the inner periphery side of the fuel passage formation body; and an outer ring (19) disposed at the outer periphery side. One of a space between the fuel passage formation body and the inner ring and a space between the fuel passage formation body and the outer ring forms an annular pilot fuel supply passage (33). The other space forms an annular main fuel supply passage (35).SELECTED DRAWING: Figure 2 |
