| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rotational shaft device preventing a shaft and/or a dynamic pressure bearing from being damaged, and to provide a fuel cell system. <P>SOLUTION: The rotational shaft device comprises: a case 2 including a working chamber 20 and a gas inlet port 21 communicating with the working chamber 20; a shaft 4 rotatably disposed to the working chamber 20 of the case 2; a drive part 5 rotating the shaft 4; dynamic pressure type gas bearings 6 (61, 62, 63) disposed to the working chamber 20 of the case 2 and generating a dynamic pressure ascending force rotatably supporting the shaft 4; and a gas inlet part 7 connected with the gas inlet port 21 of the case 2. The gas inlet part 7 introduces the gas to the working chamber 20 of the case 2 from the gas inlet prot 21 to increase pressure of gas in the working chamber 20 and thereby to increase density of the gas, and increases the dynamic pressure ascending force of the gas bearing 6. <P>COPYRIGHT: (C)2009,JPO&INPIT |
