GB253103A - Improvements in or relating to gyratory cone crushers - Google Patents

Abstract

253,103. Symons, E. June 4, 1925, [Convention date]. Crushers with gyratory heads. - In a gyratory crushing-machine with a concave surrounding a gyratory cone, yielding means is provided for holding the concave normally in positively fixed relation to the cone, the means being adapted to permit the movement of the concave in response to a predetermined pressure thereagainst in excess of the normal crushing-pressure. The concave is mounted to tilt about a centre on the side of the concave opposite the point or zone of application of the excess pressure. The opposed surfaces of the cone and concave are parallel throughout the greater part of their length, and a deflector plate with a central spherical portion and a surrounding flattened rim is positioned above the cone. The crushing-cone L, Fig. 1, is carried by an inclined gyrating shaft J mounted within an eccentrically-apertured sleeve D which is rotated by bevel gearing D', E<8> from the driving-shaft E<7>, the shaft and sleeve being formed with a number of opposed stepped bearing-surfaces of successively smaller diameter from top to bottom of the shaft. The ledges intermediate the successive stepped portions J<3>, J<4>, J<5> of the shaft are spaced away from the corresponding ledges intermediate the stepped portions D<4>, D<5>, D<6> of the aperture in the sleeve, the spaces thus formed being in line with lateral oil ducts J<8>, J<9> leading from an axial aperture J<6> in the shaft. The sleeve D is mounted in a central cylindrical housing B of the frame A<1> and is supported by a rotating plate D<10> which rests upon inset blocks C<3> in the top of a cap C closing the bottom of the housing B. A spherical portion L<1> of the cone L engages the spherical bearing-surface H<1> on a cap H which closes the top of the housing B, and an inwardly-projecting annular flange L<3> on the skirt L<2> of the cone is provided with a spherical surface L<4>, concentric with the surface L', to engage a washer or oil-wiping member H<4> on a spherical part H<3> of the cap H. The mantle members M. M<1> are secured on the head L 'by means of a sleeve M<3> and nut M', and an axial aperture at the upper end of the shaft J receives the stub N' of the deflector plate N<2>. The concave Q<8> carrying the mantle sections Q<11>, Q<12> is supported by means of bolts Q' from a ring Q which engages the upper edge of an upper frame member O slidablv mounted within the lower fixed frame portion A<1>. The bolts Q' pass through the flange, Q<14> of the concave and are surrounded by spiral springs Q<16> which bear against the flange Q<14> and a stop ring Q<15>. Bolts P pivoted at P<1> to the member A' pass through ears 0<1> on the member O and are provided with upper and lower securing-nuts P<5>, P<4>. The terminal parts R<2> of the arms R<3> which support the ring R<4> of the flexible apron R<5> seat upon nuts R<1> on the bolts P. The central feed-spout R<6> is connected to the ring R<4>, and a housing R<8> seated upon the ring Q projects upwardly about the apron R<5>. A rotary oil pump G', Fig. 2, in an oil tank S and driven through bevel gearing G<4>, G<5> from the shaft E' forces oil through a pipe S<1> to the cap C whence it passes into the space beneath the sleeve D and shaft J. A lateral passage J<7> leads from the aperture J<6> in the shaft into the hollow interior of the head L, whence the oil passes by ducts L<12>, L<6>, L' to the bearing-surfaces H<1>, L<1>. A passage H<5> leads the oil from the circumferential sump H<2> in the ring H to the parts enclosed by the housing B<1>, and the oil returns from the space S<1>' by a passage S<10> in the housing E and pipe S<12> to the tank S. In a modification, Fig. 4, the cone as well as the concave is yieldingly mounted, and unitary means is provided for holding the head c<3> upon the shaft c<6>, the cone d<2> upon the head, and the mantle rings e, e<1> upon the cone. The hollow cone d<2> is tiltably supported on a spherical seating d on the head c<3> by resilient means comprising a series of stout springs g<4> arranged within spring g<3> and compressed between seatings g<5>, g<6> provided with interlocking sleeves g', g<10>. The seat g<5>is pressed against a lock-nut g at the top of the shaft c<6>; and the seat g<6>, through the medium of a spherical seating, and a ring e<4> is pressed against the upper end of the upper ring e<1> of the mantle.