| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rotating shaft structure for a high temperature fluid fan, having smaller-size construction for greatly suppressing the heat conduction of a rotating shaft. <P>SOLUTION: The rotating shaft A has a high temperature side shaft part 1 as part of the fan F1, an intermediate part 2 forming at least part of a portion corresponding to a sliding bearing B and having a porous body, and a low temperature side shaft part 3 connected to a drive mechanism M. The low temperature side shaft part has a through-hole 4 through which fluid is supplied to the porous body. A discharge gap 5 is provided between the rotating shaft A and the sliding bearing B. The fluid is supplied through the through-hole 4, the porous body and the discharge gap 5 into a gas flow path 102. Thus, heat exchange is carried out by the porous body of the intermediate shaft part 2 to thermally separate the high temperature shaft part 1 from the low temperature side shaft part 3. The fluid sprayed from the porous body gives lubricating performance to the sliding bearing B. <P>COPYRIGHT: (C)2007,JPO&INPIT |
