Patent GB-173739-A (GB)
Title: Improvement in and relating to crushers
IPC: B02C2/06
Filed: 1921-12-02
Abstract: 173,739. Allis-Chalmers Manufacturing Co., (Assignees of Newhouse, R. C.). Jan. 3, 1921, [Convention date]. Crushers with gyratory-heads.-The crushed material from a gyratory crusher is discharged in a pair of non-converging adjacent independent streams. The shell of the crusher is strengthened by a strut extending from the shell at a point between the streams to the eccentric bearing of the upright shaft which carries the crusher head, and the strut is formed so as to serve as the inner wall of a pair of delivery shoots. The crusher comprises top and bottom shells 1, 2, Fig. 1, the shaft 4 of the head 8 being supported by a suspension bearing 5, 6, 7 and actuated by an eccentric 10 rotating within a bearing 13 supported by a member 14 which is formed with passages 15, 16 for the circulation of water or other cooling fluid supplied and discharged by pipes 17, 19. A bevel-wheel 20 on the eccentric 10 gears with a bevel-wheel 30 on the driving- shaft 31, and is supported on a wearing-ring 22 carried by the bottom plate 21 which is secured to the shell 2. A pump 33, Fig. 4, which may be of the rotary-gear type, is mounted in the housing of the bearing 32 of the shaft 31, and a pinion 36 which can be keyed to either end of the shaft of the pump gears with a wheel 37 on the shaft 31. The cylindrical portion 38 of the pump casing is journaled in the wall 40, and the other end of the casing projects through a hole 41 in the wall 42 and is provided with a flange for bolting the pump in position. The walls 41, 42 are surmounted by a roof 43. The pump draws oil through the pipe 46 and forces it through a pipe 47 into the well formed by the central portion of the bottom plate 23. Part of the oil passes up and out between the ring 22 and the wheel 20, and part passes into the recess 27 of the rotating cover-plate 26, whence it passes through the pipes 28 and up between the shaft 4 and eccentric 10, through passages 80, 81, down between the eccentric 10 and bearing 13, into the gear 20 which throws it into the annular well from which the pipe 46 leads. The shell 2 is provided with a bifurcated discharge opening 48, 49, Fig. 2, leading from the diaphragm 50 and communicating with shoots 51, 52. A liner section 60 with oppositely inclined surfaces 61, 62 rests upon the semi-annular rear portion 55 of the diaphragm and prevents any crushed material from lodging at the rear of the pipe-like portion 56 of the diaphragm. The inside walls 63, 64 of the shoots extend down to the strut 19 and are surmounted by a saddle-like portion 65 with oppositely inclined surfaces 66, 67. The member 14, strut 19, pipe 56, walls 63. 64, and portion 65 are cast integral with each other. The material discharged from the openings 48, 49 may be directed upon a spout 71, which may be common to the two openings. A dust-ring 74 surrounding the shaft 4 rides on the upper end of the portion 56, and a bonnet 75 and ring 79 prevents dust from entering the eccentric bearing surfaces. In crushers of larger size, Figs. 6 and 7, the bottom shell 84 has a flange 85 to rest upon a foundation or support 87, and the top shell 83 has a flange 86 to rest upon the flange 85 so that the bottom shell supports only its own weight and the parts hung therefrom. The shell 4 is provided with opposite bifurcated discharge openings 88, 89 and 90, 91 forming the bottom terminals of a diaphragm 92 which comprises shoots 93, 94, 95, 96 the lower ends of which terminate at the openings 88, 89, 90, 91. Saddle-like portions 107, 108 and 109, 110 surmount the inner walls of the shoots. The Specification as open to inspection under Sect. 91 (3) (a) comprises also a modification, Fig. 9 (Cancelled), in which the driving-shaft 115 and gear 116 pass through one of the side openings 117 of the bottom shell 129, instead of the rear opening, and the bulges 119 on the pipelike portion 118 of the diaphragm 128 are so formed that the extension 121 on the dust-bonnet 122 moving with the gyrating-means may be above the central level 126 of the diaphragm. This subject-matter does not appear in the Specification as accepted.