Rotation part of rotary machine and method of manufacturing the same

1. A method of manufacturing a rotation part of a rotary machine, the method comprising:

preparing a raw material member;

lathing processing the raw material member to form a first-cut raw material member including an upper part and an intermediate part;

end milling processing the first-cut raw material member to form a base unit having a surface constituting fluid channels, a plurality of blade units protruding from the base unit, and a plurality of shroud segment support units connected to the plurality of blade units and extending in a parallel direction to the surface of the base unit;

end mill processing the plurality of blade units and the plurality of shroud segment support units to form a first reinforcing unit on an intersection portion between the plurality of blade units and the plurality of shroud segment support units;

placing a shroud segment between adjacent shroud segment support units of the plurality of shroud segment support units; and

bonding the shroud segment and the adjacent shroud segment support units,

wherein the end milling processing the first-cut raw material member comprises:

cutting an opening part in the intermediate part; and

cutting the intermediate part through the opening part to form the plurality of blade units protruding form the base unit and the plurality of shroud segment support units extending in the parallel direction to the surface of the base unit.

2. The method of claim 1 , wherein the rotary machine comprises a compressor or a pump.

3. The method of claim 1 , wherein the raw material member has a cylindrical shape.

4. The method of claim 1 , wherein the raw material member comprises forging steel.

5. The method of claim 1 , wherein the forming the first reinforcing unit comprises forming a surface of the first reinforcing unit with a curved shape.

6. The method of claim 1 , wherein the forming the first reinforcing unit comprises forming the first reinforcing unit having a cross section of a triangular shape.

7. The method of claim 1 , wherein the processing the raw material member comprises forming a second reinforcing unit on an intersection portion between the base unit and the plurality of blade units.

8. The method of claim 1 , wherein the bonding the plurality of shroud segment support units and the shroud segment comprises at least one of laser welding, electron beam welding, arc welding, gas welding, resistance welding and brazing.

9. The method of claim 1 , further comprising, after the bonding, performing cutting processing or grinding processing on a bonding part of the plurality of shroud segment support units and the shroud segment.

10. The method of claim 1 , wherein a distance from a protruding direction center line of a blade unit of the plurality of blade units to an end portion of a shroud segment support unit of the plurality of shroud segment support units is greater that a maximum distance from the protruding direction center line of the blade unit to an end portion of the first reinforcing unit.

11. The method of claim 10 , wherein a distance difference between the distance from the protruding direction center line of the blade unit to the end portion of the shroud segment support unit and the maximum distance from the protruding direction center line of the blade unit to the end portion of the first reinforcing unit is configured to be greater than a predetermined value to prevent the first reinforcing unit from being thermally affected during the bonding the shroud segment and the adjacent shroud segment support units.

12. The method of claim 1 , wherein the processing the raw material member comprises forming a first step structure in the plurality of shroud segment support units, and

further comprises forming a second step structure in the shroud segment, the second step structure connected to the first step structure.

13. The method of claim 12 , wherein each of the first step structure and the second step structure comprises a plurality of steps.