| 摘要 |
A gyratory crusher comprises a crusher head (12) on which a first crushing shell is mounted; a frame (4) on which a second crushing shell is mounted and forms in conjunction with the first crushing shell a crushing aperture; a drive device adapted to rotating an eccentric to which the crusher head (12) is so connected as to be adapted to being caused, during rotation of the eccentric, to perform a gyratory movement for crushing of material which is introduced into the crushing aperture; and a dust seal (30) which is adapted to sealing a gap between the frame (4) and a fastening portion (37; 52) situated close to the crusher head (12) and which comprises a seal bellows (32) and a seal slide ring (34) which is connected sealingly to a lower portion of the seal bellows (32) and has a lower slide surface (42) adapted to sliding along, and to abutting sealingly, with a substantially vertical abutment pressure determined by the inherent weight of the seal slide ring (34) and by the influence of the seal bellows (32), against an upper slide surface (44) provided on the frame (4), with an upper portion (36) of the seal bellows (32) sealingly connected to said fastening portion (37; 52), so that rotation of the crusher head (12) causes rotation of the seal slide ring (34) about a substantially vertical axis of rotation.
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