| 摘要 |
PROBLEM TO BE SOLVED: To improve the eccentric wear resistance, the wear resistant life and the noise resistant performance by overlapping adjacent S-shaped or Z- shaped blocks to each other in the circumferential direction with a specified range of overlapping quantity. SOLUTION: The movement of individual blocks can be reduced by overlapping adjacent S-shaped or Z-shaped blocks to each other in the circumferential direction. The effect of the eccentric wear resistance can be remarkably improved by arranging a plurality of rows of the S-shaped or Z-shaped blocks. The overlapping quantity O between adjacent blocks in the circumferential direction is 15-45%, preferably 30-40% of the circumferential length of the block. The overlapping quantity is more excellent to reduce the movement of the individual blocks, but when the overlapping quantity exceeds 45%, end parts of the individual blocks are acute in shape, and the movement of the block end part is increased on the contrary. |
