Patent GB-258471-A (GB)
Title: Improvements in vertical disc crushers
IPC: B02C7/08
Filed: 1926-01-25
Abstract: 258,471. Symons, E. B. Jan. 25, 1926. Disc and like mills.-In a vertical disc-crusher in which the material is fed to the central portion of a crushing zone between opposed rotating discs, the base frame - member comprises a bottom plate A<1>, a central bearing-sleeve A<6>, and a circumfer. ential wall-member A 8, both pro. jecting upwardly from the plate A<1>, and a frame-supporting abutment member A<10> projecting inwardly from the wall A<8>. The conical frame-member B has an enlarged seat B<1> at its lower edge to engage the inclined seat A<11>, of the coned portion A<10>, and is secured thereto by means of downwardly and outwardly inclined bolts B'. The eccentrically-apertured sleeve E, driven through gearing D<9>, E<10> from the driving-shaft D, rotates within a sleeve C<6> carried by a branch C<1> of the member B and within the sleeve A<6>, its downward thrust being taken by the bearing-bushing E<5> with its outwardly and inwardly projecting flanges E<6>, E<7> respectively. The downwardly-extending shaft L<1> of a ball wedge L, preferably of chrome vanadium steel or other hard steel, is rotatably mounted in the aperture of the sleeve E. The ball wedge is gyrated by the sleeve E, its weight being supported upon a bearing-plate K<1> having a circumferential annular upwardly-projecting flange K<2> with a spherical bearing-surface K<3> against which a similar opposed spherical bearing-surface upon the tilting plate-member L<5> acts. The upper surface of the ball wedge and the lower surface of the tilting plate are spherical and concentric, and the supporting-means for the upper and lower crushing-discs p<2>, M, is rotated through gearing D<10>, I<10> from the shaft D. Crushing is effected by the alternate approach and recession of the lower disc from the upper disc in response to the gyration of the ball wedge and the consequent movement of the tilting plate. The entire superstructure of the crusher is supported by a ball bearing on an outwardly-extending shelf C<2> of the member B and is centred by a sleeve I<4> which rotates about the upper portion of the sleeve C<6>. An upper plate H<10> rests upon the balls H<4> which are contained in apertures in a ball-ring H<1> and rest upon a lower track H, the ring H<1> being supported upon the balls out of contact with the track H and having a downwardly-extending inner portion H<8> which bears upon a ledge C<3> having an upwardly-projecting part C<4> to prevent radial movement. Pins or lugs M<9> on the lower disc M engage apertures M<10> in the plate L<5>, to which the disc is secured by means of a clamping-plate M<3> and bolts M<4> A protecting plate M<7> covers the plate M<3> and the nuts M<8> of the bolts M<4>. The upper disc P<2> is carried by an adjustable plate P having screw-threaded engagement with a spring-pressed collar 0<3> resting on a ring O carried by spacing sleeves N<5> on bolts N' which pass through bosses N on the flanges I<11>, I<12> of the supporting plate I. A collar P' and clamping-member P<4> hold the disc <p2> in position. The crushed material passes outwardly between the sleeves N<5> into a hopper housing formed by outer and inner walls R. R<1>, a wearresisting member R<3> being provided on the inside of the wall R to receive the impact of the centrifugally discharged material.