| 摘要 |
<p>A gyratory crusher (10) having a frame (14), a conical head (13) and a concave liner (18) mounted on the frame in order to define a crushing zone (19) between an external surface of the conical head and a facing internal surface of the concave liner, and a drive arrangement operative to provide a cycle of relative gyratory movement between the conical head (13) and the concave liner (18) in order to exert a progressive crushing action circumferentially of the crushing zone, in which the drive arrangement comprises: a set of hydraulically operated actuators a, b, c, d, e, f, g, etc spaced apart circumferentially with respect to the crushing zone (19); and a hydraulic control arrangement to provide an operational cycle of the set of actuators such that, during energisation of any individual actuator (a), one or more downstream actuators, other than adjacent actuator (b), undergo pressurisation so as to exert a combined crushing force between the concave liner and the conical head.</p> |
