Claims
- 1. An impeller for a high-temperature gas blower, rotated to blow a high-temperature gas, comprising a plurality of vanes comprising an alloy and 0.1-2.0% by weight of finely divided particles of a metal oxide having a high melting point dispersed in said alloy.
- 2. An impeller according to claim 1, wherein said vanes comprise 0.1-2.0% by weight of said metal oxide, 18-40% by weight of Cr, not more than 5% by weight of Fe, not more than 5% by weight of Al, not more than 5% by weight of Ti and the balance including Ni as a major element, wherein said Cr, Fe, Al and Ti and said balance constitute an austenite matrix phase in which said finely divided particles are dispersed.
- 3. An impeller according to claim 2, wherein said vanes are formed by repeated bonding and plastic deformation of particles of said metallic elements Cr, Fe, Al, Ti and Ni and said particles of said metal oxide, while being subjected to mixing and crushing in a ball mill.
- 4. An impeller according to claim 3, wherein said plurality of vanes are formed by hot extrusion.
- 5. A high-temperature gas blower having an impeller rotated to blow a high-temperature gas, said impeller comprising a plurality of vanes comprising an alloy and 0.1-2.0% by weight of finely divided particles of a metal oxide having a high melting point dispersed in said alloy.
- 6. A high-temperature gas blower according to claim 5, wherein said vanes comprise 0.1-2.0% by weight of said metal oxide, 18-40% by weight of Cr, not more than 5% by weight of Fe, not more than 5% by weight of Al, not more than 5% by weight of Ti and the balance including Ni as a major element, wherein said Cr, Fe, Al and Ti and said balance constitute an austenite matrix phase in which said finely divided particles are dispersed.
- 7. A high-temperature gas blower according to claim 6, wherein said vanes are formed by repeated bonding and plastic deformation of particles of said metallic elements Cr, Fe, Al, Ti and Ni and said particles of said metal oxide, while being subjected to mixing and crushing in a ball mill.
- 8. A high-temperature gas blower according to claim 7, wherein said plurality of vanes are formed by hot extrusion.
- 9. A high-temperature gas blower according to claim 5, further comprising a motor and a drive shaft rotated by said motor, and wherein said impeller further comprises a cylindrical hub fixed to an end portion of said drive shaft, said plurality of vanes consisting of a plurality of generally elongate plates which are fixed to said hub so as to extend radially of said hub such that said vanes are equally spaced apart from each other in a circumferential direction of said hub.
- 10. A high-temperature gas blower according to claim 9, wherein each of said generally elongate plates has a fixed end portion at which said each plate is fixed to said hub, said fixed end portion having protrusions which protrude away from each other from planes of opposite major surfaces of the other portion of said each plate, in a direction of thickness of said each plate, said hub having a plurality of grooves corresponding to said plurality of generally elongate plates, each of said grooves having a shape similar to that of said fixed end portion, said plates being fixed to said hub such that said fixed end portion of said each plate is fixedly received in a corresponding one of said grooves.
- 11. A high-temperature gas blower according to claim 9, further comprising a cylindrical bearing housing having an annular cooling jacket through which a coolant is circulated, and a pair of bearings supported in said bearing housing, said drive shaft being rotatably supported by said pair of bearings such that said drive shaft extends through said bearing housing in an axial direction thereof.
- 12. An impeller for a high-temperature gas blower, rotated to blow a high-temperature gas, comprising a plurality of vanes comprising an alloy and 0.1-2.0% by weight of finely divided particles of a metal oxide having a high melting point dispersed in said alloy, and where said metal oxide is selected from the group consisting of Y.sub.2 O.sub.3, Ce.sub.2 O.sub.3, ZrO.sub.2, Al.sub.2 O.sub.3 and Gd.sub.2 O.sub.3.
- 13. A high-temperature gas blower having an impeller rotated to blow a high-temperature gas, said impeller comprising a plurality of vanes comprising an alloy and 0.1-2.0% by weight of finely divided particles of a metal oxide having a high melting point dispersed in said alloy, and where said metal oxide is selected from the group consisting of Y.sub.2 O.sub.3, Ce.sub.2 O.sub.3, ZrO.sub.2, Al.sub.2 O.sub.3 and Gd.sub.2 O.sub.3.
Parent Case Info
This is a division of application Ser. No. 08/110,949, filed on Aug. 24, 1993.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5310431 |
Buck |
May 1994 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
110949 |
Aug 1993 |
|