Patent ID: 9708921
Date: 2017-07-18
CPC Classifications: F01D,F04D

Claim:
1. An impeller rotating about a rotary shaft, the impeller comprising: an inlet through which a fluid is introduced; an outlet through which the fluid is discharged; a supporter connected to the rotary shaft; a blade portion provided on the supporter; a shroud disposed to cover the blade portion; and a seal including at least one sealing protrusion protruding in an axial direction of the rotary shaft, the seal being coupled to the shroud at an outermost end of the shroud along the axial direction thereby forming a junction between the shroud and the seal, wherein a width of the seal, in a radial direction of the shaft, being measured above the junction between the seal and the shroud is greater than a width of the shroud, in the radial direction of the shaft, being measured at the junction.