| 摘要 |
In a turbine wheel, each of seal plates is formed from an elastic plate member whose radially intermediate portion is curved projecting toward one axial end surfaces of turbine blades and a turbine disk. The seal plate includes: an assembly recessed portion recessed in a direction getting closer to the one axial end surfaces, near a radially outer end of the plate; and a disassembly protrusion projecting in a direction getting away from the one axial end surfaces, near a radially inner end of the plate. When the recessed portion is pressed for attaching the plate, a tip end of the recessed portion comes into contact with the one axial end surface of each turbine blade or the disk. The plate is accordingly inhibited from being excessively deformed. Thus, the plate is blocked from being plastically deformed, and is precluded from coming off the wheel, |
| 主权项 |
1. A turbine wheel comprising:
a turbine disk including a plurality of groove portions which are formed in its outer periphery; a plurality of turbine blades respectively including protrusions which are formed on their base ends, and fixed to the turbine disk by fitting the protrusions into the groove portions in an axial direction; outer annular grooves each formed in one axial end surface of the corresponding turbine blade, and each opened inward in a radial direction; an inner annular groove formed in one axial end surface of the turbine disk, and opened outward in the radial direction; and seal plates for sealing gaps between the groove portions and the protrusions by being fixed to the respective one axial end surfaces of the turbine blades and the turbine disk with a radially outer end portion of each of the seal plates in contact with a groove bottom of the corresponding outer annular groove, and with a radially inner end portion of each seal plate in engagement with a step portion in the inner annular groove, wherein each seal plate is formed from an elastic plate member whose radially intermediate portion is curved projecting toward the one axial end surfaces, and the seal plate includes an assembly recessed portion, which is recessed in a direction getting closer to the one axial end surfaces, in a position neat a radially outer end of the seal plate, and a disassembly protrusion, which projects in a direction getting away from the one axial end surfaces, in a position near a radially inner end of the seal plate. |
