The present disclosure provides a generally cylindrical bowl support for a cone crusher which includes a plurality of evenly, circumferentially spaced ears around the periphery of the support. The ears are designed to have clamping cylinders mounted thereto to provide protection from tramp iron and the like passing through the cone crusher. A plurality of thickened ribs are defined in the support, at least some of the thickened ribs extending downwardly from the ears to form abutting polygon configurations to spread and absorb forces from a crushing operation. Other ones of the ribs define at least one circumferentially-extending, continuous ring forming portions of the polygons.

The disclosure relates to novel components of a gyratory crusher (1) which aim to promote self-alignment of a mainshaft assembly (2) upon introduction of the mainshaft assembly (2) into the gyratory crusher (1) by lowering the mainshaft assembly (2) from above the gyratory crusher (1) into the gyratory crusher (1). The novel components may include a dust bonnet (9) having a plurality of guides (15), an end plate (32) having a lower alignment chamfer (36), and/or a counterweight (13) having an alignment chamfer (41). Each of the novel components may be configured to bias a lower mainshaft (26) of the mainshaft assembly (2) of the gyratory crusher (1) into concentric alignment with a bore (56) of the eccentric (11) or eccentric liner (12).

A dust seal for a cone crusher or gyratory crusher and a cone crusher or gyratory crusher are provided, wherein the crusher includes a stationary part having a dust collar, and a crusher head which is supported so as to be rotatable relative to the stationary part in a crushing direction of rotation and in an idling direction of rotation which is opposite to the crushing direction of rotation. The dust seal has a crusher head contact portion configured for directly or indirectly contacting the crusher head, and a dust collar contact portion configured for directly or indirectly contacting the dust collar crusher head. The dust seal is configured to impart a frictional force between the crusher head and the dust seal via the crusher head contact portion, and/or between the dust collar and the dust seal via the dust collar contact portion upon rotation of the crusher head at least in the idling direction of rotation. The invention is characterized in that the dust seal is configured so that the frictional force imparted by the dust collar contact portion and/or the crusher head contact portion is higher upon rotation of the crusher head in the idling direction of rotation than upon rotation of the crusher head in the crushing direction of rotation.

An eccentric assembly for use in a gyratory or cone crusher is provided. The gyratory or cone crusher includes a main shaft having a longitudinal extension along a central axis of the crusher, a head assembly including a crushing head provided with a first crushing shell, and a frame provided with a second crushing shell, wherein the first and second crushing shells between them define a crushing gap. The eccentric assembly is provided with an inner circumferential surface and an outer circumferential surface eccentrically arranged relative to the inner circumferential surface, wherein the inner circumferential surface of the eccentric assembly is arranged for being journalled to the main shaft so that the eccentric assembly is adapted to rotate about said central axis, and wherein the outer circumferential surface of the eccentric assembly is arranged for being journalled to the crushing head. The eccentric assembly includes a first eccentric part and a second eccentric part which is configured for being located at a distance from the first eccentric part in a direction along the central axis.

A gyratory crusher topshell assembly in which a spacer (filler) ring is mounted radially intermediate a topshell and an outer crushing shell. The spacer ring is locked axially at the topshell via a shape profile of the mating surfaces of the spacer ring and the topshell. Additionally, the spacer ring is rotationally locked at the topshell via contact between abutments extending between the spacer ring and the topshell.

A parabolic vibration-pulse mill for grinding material, which comprises a case with an outer cone and an inner cone arranged inside on a spherical support, with driving vibrator mounted on a shaft of said inner cone through a bearing, the cones being fitted with mantles having working surfaces forming a grinding chamber between them, wherein, in a lower section of the grinding chamber, working surface of each mantle being formed by parabola of generatrix with its concavity, in longitudinal cross-section, facing a mill longitudinal axis; and wherein, in a upper section of the grinding chamber, working surface of each mantle being formed by parabola of generatrix with its convexity, in longitudinal cross-section, facing a mill longitudinal axis, and wherein conjugation of said parabolas is smooth.

Moreover, the mill, wherein parabolas can be defined by the formula h=k.Math.r.sup.2/R, wherein h is the distance along an axis of the parabola, between a vertex of the parabola and circle formed by a cross section of the parabola, r is the radius of said circle, R is the radius of an sphere defined by the inner cone.

The mill with vertical distribution of material in the grinding chamber, providing a grinding ratio up to 30, with little wear of grinding mantles and low energy consumption.

A cone crusher includes body installed on foundation with resilient dampers and having an outer cone and an inner cone. Unbalance weight is on the drive shaft of inner cone using a slide bushing, with center of gravity adjustable relative to rotation axis, slide damper of unbalance weight connected to transmission coupler, through which torque is transmitted. Transmission coupler is a disc coupler comprising a drive half-coupler, a driven half-coupler, and a floating disc between them. The driven half-coupler is rigidly connected to slide bushing, and the drive half-coupler, to gear rigidly connected to counterbalance weight. The drive half-coupler, gear and counterbalance weight are mounted on the slide bushing, and driving half-coupler, gear, counterbalance weight, and the slide bushing form one movable dynamic assembly, installed using a mounting disc, on fixed rotation axis, which rests upon flange rigidly fixed in the bottom part of body of the crusher.

A gyratory crusher includes a spider supported at a top shell, the spider having a pair of spider arms protected by respective arm shields. The shields are mounted and dismounted at the respective arms via a locking flange and notch and lug arrangement to avoid attachment by welding or attachment bolts.