| 摘要 |
PROBLEM TO BE SOLVED: To prevent the generation of corrosion in a bonding surface by lining a buffer material in the inner peripheral surface of a cylindrical backup shell made of aluminum or the aluminum alloy, and forming an oxide film in a bonding surface of the shell to the buffer material. SOLUTION: This bearing has a cylindrical backup shell 10, a nearly cylindrical buffer material 12 made of the elastomer or the plastic material and formed for lining of the inner peripheral surface of the backup shell, and a segment 14 made of teflon and fitted to a recessed part 12a formed in the inner peripheral surface of the buffer material 12 with the predetermined space in the circumferential direction. This inner peripheral surface works as a sliding surface to a shaft S. The shell 10 made of aluminum or the aluminum alloy is used for a vessel made of aluminum or the aluminum alloy, and even it contacts with the sea water having the lubricating work, corrosion due to a contact of different metals is not generated. A bonding surface of the shell 10 to the buffer material 12 is formed with an oxide film having excellent corrosion resistance and 30-100μm of film thickness. Corrosion of the bonding surface is thereby prevented, and the growth of the aluminum oxide inside of a clearance between the shell 10 and the buffer material 12 is prevented.
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