| 摘要 |
<p>The gyratory crusher includes a bowl which defines a chamber for receiving material to be crushed and a discharge opening at the base thereof through which crushed material is able to discharge. A crushing head is mounted in the bowl at an offset position with respect to a central axis of the bowl, and a drive assembly is operable for driving the crushing head within the bowl for imparting gyratory motion to the head about a gyratory axis inclined with respect to and intersecting the central axis, whereby frangible or friable material received into the chamber is subjected to crushing between an inner peripheral surface of the bowl and an outer peripheral surface of the head by the gyratory motion of the head. The crusher further includes a system for restraining rotation of the head relative to the bowl and the gyratory axis, including an annular resilient member disposed between an annular lower peripheral region of the head and an annular surface, of a fixed structure of the crusher, which is spaced from and substantially co-axial with the region; securing means for securing a first edge of the resilient member to one of the annular regions of the head and the fixed structure annular surface; an annular band of friction material around a second edge of the resilient member; and biasing means for urging the friction band into frictional contact with the other one of the annular region of the head and the fixed structure annular surface.</p> |
