| 摘要 |
PROBLEM TO BE SOLVED: To provide a three-dimensional impeller of a turbine, capable of increasing efficiency by reducing turning speed at an impeller outlet even if a flow rate of fluid flowing inside is small, whose capacity can be increased, and in which maximum stress produced in a blade surface can be reduced. SOLUTION: The three-dimensional impeller 10 of a turbine, in which fluid flows in perpendicularly to a rotary shaft 11 and flows out in the axial direction, has a plurality of turbine blades 12 arranged around the rotary shaft. The turbine blades 12 each have a three-dimensional shape from a hub 15 to a tip 16. Further, a rear edge blade angle of the tip is smaller than a rear edge blade angle of the hub, a rear edge blade angle at an intermediate position 14c of the tip and the hub is larger than a rear edge blade angle of the tip and the hub, and the rear edge blade angle between the tip and the hub has a maximum value. COPYRIGHT: (C)2012,JPO&INPIT |
