| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the sealability and durability of a machine outside seal part which is disposed on the machine outside and prevents the entry of foreign matters in a sealing device which is installed between two members rotating relative to each other, suppresses the leak of a sealing fluid such as grease or oil in a machine to the outside of the machine, and suppresses the entry of foreign matters such as slurry or dust on the outside of the machine into the machine. <P>SOLUTION: The machine outside seal part includes first to third flange parts disposed staggered, a first screw seal which is disposed between the first and second flange parts and performs pumping action when a device is rotated, and a second screw seal which is disposed between the second and third flange parts and performs pumping action when the device is rotated. Two screw seals formed of the first and second screw seals which are disposed between three flange parts formed of the first to third flange parts prevent the entry of foreign matters on the outside of the machine by the pumping action of one screw seal performed from the outside toward the inside in the radial direction and the pumping action of the other seal performed from the inner side toward the outside in the radial direction. <P>COPYRIGHT: (C)2011,JPO&INPIT |
