| 摘要 |
A tumbling unit such as a casting shake-out unit, rotary media drum, sand reclaimer or the like includes a cylindrical outer shell (3) and a cylindrical inner liner (5). The inner liner (5) is formed of a series of interfitting segments (9). The segments (9) each have an inner surface, an outer surface, side edges (17), a front edge and a back edge (19), and two vanes (21) extending from the outer surface. The side edges (17) of the segments (9) have a groove (25) and the grooves (25) of neighboring segments (9) define a channel between the segments (9). A pin (27) in the channel urges the neighboring segments (9) apart to form a tight interfit among the segments (9) in a row of the liner (5). The pin (27) conforms in shape and size to the cross section of the vanes (21), and align with the vanes (21) of the adjacent segments (9) to form a continuous spiral upon the outside of the liner (5). |
