| 摘要 |
PROBLEM TO BE SOLVED: To considerably prevent a fine powder particle from entering a seal surface, reduce abrasion of an inner peripheral surface of a gland packing, reduce tightening frequency of the gland packing, and improve durability of a shaft seal device. SOLUTION: In a shaft seal device by a gland packing G with respect to a high pressure gas in which the fine powder particle is mixed, a dust seal 2 by a lip seal, a labyrinth seal R, a fluid seal F by a seal gas, and the gland packing G to which a grease lubrication is applied are arranged in this order from an inside of a high pressure container. While an outer seal 19 is arranged in a gland pushing end of the gland packing, and the seal gas introduced from an outside is discharged inside the container through the fluid seal F, the labyrinth seal R, and the dust seal 2, an appropriate amount of the seal gas is discharged from a space of the fluid seal to the outside, and before being contact with the gland packing, the entering powder particle is surely and positively discharged to the outside. |
