| 摘要 |
PROBLEM TO BE SOLVED: To provide a mechanical seal having excellent follow-up capability to a stationary seal ring and capable of developing excellent sealing function. SOLUTION: This mechanical seal 4 comprises a rotating seal ring 5 fixed to a rotating shaft and the stationary seal ring 7 fittedly held on the inner peripheral part of a metal seal case 6 through an O-ring 12 so as to be moved in the axial direction. A clearance between the seal case 6 and the stationary seal ring 7 is secondarily sealed while the seal ring 7 is allowed to move in the axial direction by engagedly holding the O-ring 12 on the outer peripheral surface part of the stationary seal ring 7 and pressingly bringing it into contact with the inner peripheral surface part of the seal case 6. A resin coating film 63 with a film thickness of 5 to 100μm is formed on the inner peripheral surface part of the seal case 6 within a range where the O-ring 12 is relatively displaced following at least the axial movement of the stationary seal ring 7. COPYRIGHT: (C)2006,JPO&NCIPI
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