The operational mannered null principal axis of the gyratory crusher

摘要

PROBLEM TO BE SOLVED: To provide a gyratory crusher capable of preventing intrusion of powdery dust into a lube oil circulation part at the lower part of a main spindle, even if a dust seal ring expands and deforms by the friction heat due to eccentric gyratory motion of a spindle assembly head.;SOLUTION: In this gyratory crusher, dust seal structure shutting off the communication between a crusher chamber and the lube oil circulation part at the lower part of the main spindle is composed of: a cylindrical body 1 provided to surround the lower part of the main spindle 12 and its bearing immediately below the head center 13, and mounted on a lower body frame 17; the annular dust seal ring 5, tiltingly extending downward into the inner side of the radius direction, having an annular groove 5a along the peripheral direction in the inner periphery, the inner periphery facing an outer periphery of the cylindrical body 1, with a lower face slidably provided in relation to an engaging groove 2 of the head center 13; and a rubber-made V ring 6 mounted in the annular groove 5a with a lip part 6a elastically and closely contactingly to the outer peripheral face of the cylindrical body 1.;COPYRIGHT: (C)2004,JPO