| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a shaft seal device having reliability by preventing deterioration of a seal ring by preventing infiltration of seawater into a rolling bearing and fixedly and lowly holding a load acting on the seal ring. <P>SOLUTION: In the shaft seal device sealing a rolling bearing from seawater, at least three seal rings are arranged side by side in a shaft direction at a casing housing a rotary shaft and formed to come in contact with the surface of the rotary shaft, an air supply device supplying air so that an inner pressure formed by adding a ring fastening pressure to a seawater pressure is held is connected to a first annular chamber from the seawater side of a plurality of annular chambers formed among a plurality of seal rings, an oil supply tube connected to the bottom of an oil stock tank disposed in a position higher than a second annular chamber is connected to the second annular chamber from the seawater side and an inner pressure sensing tube branched from the middle part of the air supply tube connecting the air supply device to the first annular chamber from the seawater side is connected to the upper part of the oil stock tank. <P>COPYRIGHT: (C)2012,JPO&INPIT |
