| 摘要 |
PURPOSE:To make the fan made up of sticking ceramics to an outer surface of a blade with a bonding agent usable at a high temperature state, by leading a cooling medium into a cavity part of the blade from one side of a main shaft, and forming a passage which leads it out from the other side of the main shaft. CONSTITUTION:The inside of each blade 3 in blade profile of a fan is formed into a cavity 6, and a lot of block type ceramics 7 are stuck to the outer surface with a bonding agent. A lead-in passage 9 for a cooling medium 16 is installed in one side of a rotating main shaft 1, and this cooling medium 16 is led into the cavity 6 of each blade 3 from a lead-in pipe 11. A lead-out passage 12 is installed in the other side of the main shaft 1, and the cooling medium 16 inside the cavity 6 is led out to a lead-out pipe 14. If the fan is constituted like this, the cooling medium 16 cools each blade 3 from the inside, so that temperature of the bonding agent 8 used for sticking the ceramics is maintainable to be less than the durable temperature (about 200 deg.C) all the time. Therefore, this ceramics fan can be used even in dust abrasive gas at a temperature of more than about 200 deg.C.
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