Patent GB-203576-A (GB)
Title: Improvements in or relating to gyratory crushers
IPC: B02C2/06
Filed: 1922-11-07
Abstract: 203,576. Weston, W. S. Nov. 7, 1922. Crushers and gyratory heads. - In a gyratory crusher for rock, ores, &c., the shaft carrying the crushing-cone is pivotally mounted at its lower end in the frame of the crusher and its upper end engages in the eccentric aperture of an actuating sleeve, which is rotated directly without intermediate gearing in a bearing which is free to swivel in the frame to compensate for inaccuracies in construction and bending of the gyratory shaft. The conical lower end of the shaft 32 is supported in a cap 30 situated within a tapered sleeve 27 in the axial aperture 25 of the central cylindrical portion 24 of a spider 13 which is bolted by its flange 14 to the flange 12 of the cylindrical main portion 10 of the casing. The lower end of the cap 30 rests upon a plate 28 which is adjustable vertically by means of a screw 29. A dustexcluding ring 24<1> slidably rests on the upper surface of the member 24 and moves laterally with the cap 30 and shaft 32. The upper end of the shaft 32 extends into the cylindrical aperture 33 of an eccentric sleeve 34 which is rotatably supported in the axial recess of the cylindrical central portion 35 of a bearing B mounted in the top of the casing. The outer shell 36 of the bearing B has an external spherical bearing-surface which rests against concentric spherical bearing-surfaces formed on the upper end of the cylinder 10 and on the inside of a cap 15 bolted to the flange 11 of the cylinder 10. The bearing B is free to swivel relatively to the casing, but is prevented from rotating in an horizontal plane by a key 37 rotatable about its horizontal axis; the shank of the key extends into a recess in the shell 36 and its outer end into a groove formed partially in the cap 15 and partially in the cylinder 10. The thin-walled side of the sleeve 34 is provided with internal and external lubricating grooves 39, 40 which are inclined and extend substantially half way round the sleeve. A small port 41 may connect the lowermost outer groove with the inner surface of the sleeve, and a conduit 42 connects the interior of the sleeve with an annular chamber 43 in the bearing B. The chamber 43 communicates by a duct 44 with an oil receptacle 45 secured on the shaft 32 and having its upper edge 46 inturned, a loose dust cap 50 being provided. The driving-pulley 47 is secured to the upper end of the eccentric sleeve 34 which is closed by a removable cap 51. The crushing- hopper, secured to the cylindrical surface 17 of the casing 10, comprises two main portions and two minor portions which are wedge-shaped and can be withdrawn and the hopper turned upside down to distribute the wear evenly. The crushing- cone, 53 is supported by a cone 52 on the shaft and has a separate cap portion 53<1> which serves to stir the rock, stone, &c. introduced through the openings 16 in the casing. The lower end of the shaft 32 is lubricated by oil supplied to the interior of the member 24 by a pipe 55 from an oil-cup 54. In a modification, the sleeve 34 is directly connected to the shaft of an electric motor mounted on the top of the casing.