| 摘要 |
PROBLEM TO BE SOLVED: To prevent wear of the flow passage by enlarging the flow passage where a slurry fluid passes, to improve grinding capacity, to miniaturize a rotary joint by shortening the axial length of a fixed seal ring and a rotary seal ring, and to reduce the assembly cost by facilitating the assembly. SOLUTION: The rotary joint is equipped with a first fixed seal ring 2 having a first communication passage and a seal surface on the end surface, a first rotary seal ring 3 which has a second communication passage and a seal surface for slurry and has a seal surface for fluid and a holding surface on a seal surface for slurry and an opposite surface, a rotary shaft 20 having a flow passage for slurry fluid, a second fixed seal ring 5A having a second seal surface, and other seal device 6 having a third seal surface and a third fixed seal ring. It has a fluid passage between an inner peripheral passage surface and the rotary shaft surrounded by the first rotary seal ring, the second fixed seal ring and the other seal device. The fluid passage and the first fluid passage are communicated through the passage between the second seal surface and the other seal device. The second fluid passage is communicated with the fluid passage. COPYRIGHT: (C)2004,JPO
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