Method of manufacturing radial flow turbine rotor
First Claim
1. A method of manufacturing a radial flow turbine rotor for a radial flow turbine of the type having a casing defining inlet and outlet fluid passageways, said method comprising the steps of injection molding a rotor body including a conical shaft and a plurality of blades formed on the periphery of said shaft and at an angle to the axis of said shaft from a ceramic material using a mold having parting lines corresponding to edges of the blades, allowing projections to be formed on the blade edges corresponding to the mold parting lines, sintering the molding thus obtained, and grinding the edge surfaces of said blades to remove only those portions of the formed projections to be placed adjacent the casing thereby leaving other portions of the formed projections to be placed in confronting relationship to the inlet and outlet passageways.
0 Assignments
0 Petitions
Accused Products
Abstract
A method of manufacturing a radial flow turbine rotor is disclosed, which comprises the steps of injection molding a rotor body including a conical shaft and a plurality of blades formed on the periphery of the shaft and at an angle to the axis of the shaft from a ceramic material using a mold having parting lines corresponding to blade edges such that projections are formed on the blade edges, sintering the molding thus obtained, and grinding the edge surfaces of the blades facing a casing. The blades are thus provided with projections on their inlet and outlet edges which face a fluid passage.
16 Citations
5 Claims
- 1. A method of manufacturing a radial flow turbine rotor for a radial flow turbine of the type having a casing defining inlet and outlet fluid passageways, said method comprising the steps of injection molding a rotor body including a conical shaft and a plurality of blades formed on the periphery of said shaft and at an angle to the axis of said shaft from a ceramic material using a mold having parting lines corresponding to edges of the blades, allowing projections to be formed on the blade edges corresponding to the mold parting lines, sintering the molding thus obtained, and grinding the edge surfaces of said blades to remove only those portions of the formed projections to be placed adjacent the casing thereby leaving other portions of the formed projections to be placed in confronting relationship to the inlet and outlet passageways.
Specification
-
- Resources
-
Current AssigneeTokyo Shibaura Denki Kabushiki Kaisha
-
Original AssigneeTokyo Shibaura Denki Kabushiki Kaisha
-
InventorsNishida, Katsutoshi, Ando, Akio, Nakanishi, Masae, Ochiai, Toshihiko, Kawasaki, Shozo
-
Primary Examiner(s)DERRINGTON, JAMES H
-
Application NumberUS06/711,092Time in Patent Office475 DaysField of Search264/67, 264/63, 416/188, 416/241 B, 416/244 AUS Class Current264/645CPC Class CodesF01D 5/048 Form or constructionF01D 5/284 Selection of ceramic materialsF04D 29/02 Selection of particular mat...
