GB1449806A - Gyratory crusher - Google Patents

Abstract

1449806 Gyratory crushers PORTEC Inc 16 May 1975 [28 May 1974] 20882/75 Heading B2A A gyratory crusher has a peripheral frame 1 having an uppermost annular V-way 104 Fig. 8, a conical mantle 2 Fig. 2 in the frame, a bowl assembly 4 above the mantle 2 including a cylindrical body 22 with an outer cylindrical periphery 26 of lesser diameter than the peripheral frame, an annular support ring 31 around the bowl body 22 and vertically displaceable relative thereto. The support ring 31 has a downwardly facing annular cavity 36 mating with the frame V-way 104 and supported on it, and has an inwardly facing wedge surface 34 radially spaced from the periphery of the bowl body. A segmented bowl clamp ring 37 surrounds the bowl assembly between the outer periphery and the support ring wedge surface and has an outwardly facing wedge surface 38 adjacent the support ring wedge surface 34. Bolts 58 Fig. 1 are carried by each segment of the clamp ring 37, with stop means on the upper distal part of the bolts. The bolts 58 are surrounded by fluid actuated expansible washers 46' between the stop means and the supporting ring, so that the clamp ring segment can be urged upwardly against the support ring as the two juxtaposed wedge surfaces force the segmented clamp ring radially inwardly to clamp the bawl assembly to the support ring. To readjust the bowl elevation a single lift cylinder 29 is associated with each pair of segments of the clamp ring 37. When the cylinder 29 is pressurised a release pin 67 Fig. 9 engages a platform 68 of the ring 37 and breaks the wedging action between bowl assembly and bowl support ring 31. To relieve overload due to tramp iron shock load relief cylinders 72 and hydraulic accumulators 80 are provided to relieve displacement of the bowl support ring 31. Tapered guide pins 83 Fig. 8 are arranged around the ring 31 which do not bind with apertures in the frame 1 when the ring 31 is displaced. To prevent the head 5 spinning during no load a pump 93 Fig. 4 having a check valve 99 permits a shaft 94 to rotate in one direction for crushing. The head is inhibited from contra-rotation by the resistance of the check valve 99 to reverse rotation of the pump. The oil supply to the pump serves also for general lubrication.