Abstract: The invention relates to a cone-shaped crusher including a frame having a cavity, a main shaft disposed eccentrically in the frame, and an eccentric drive making the main shaft perform a gyratory movement. The eccentric drive includes an upper eccentric shaft, a lower eccentric shaft, and an eccentric bearing. The upper eccentric shaft has an opening provided at its central portion to allow the lower end portion of the main shaft to pass through the opening, and an upper coupling part provided at its lower portion and fastened to the lower eccentric shaft. The lower eccentric shaft has a lower coupling part fastened to the upper eccentric shaft. The eccentric bearing accommodates the lower end portion of the main shaft and is disposed in a space defined by the upper eccentric shaft and the lower eccentric shaft.

Abstract: A gyratory crusher, including an outer crushing shell and an inner crushing shell forming between them a crushing chamber, the crushing chamber communicating with a discharge zone that forwards crushed material from the crushing chamber and out of the crusher. The inner crushing shell is supported on a crushing head. The outer crushing shell is supported on a crusher frame. At least one sealing arrangement is between the discharge zone and a working part zone in which at least one bearing for the crushing head to perform a gyratory movement relative to the crusher frame is arranged. The sealing arrangement includes a sealing surface, and a sealing member arranged to seal against the sealing surface and including an inner circumferential flexible sealing lip, an outer circumferential flexible sealing lip and at least one inlet for pressurized fluid to be supplied to an overpressure zone arranged between the inner and outer sealing lips and the sealing surface.

Abstract: A cone crusher having a frame, an outer blade adapted to be locked to the frame, an inner blade eccentrically and vertically movable relative to the outer blade, and the inner blade and the outer blade define there between a crushing chamber, a main shaft which is stationary relative to the frame, an eccentric bearing-mounted on the main shaft, a support cone on which the inner blade is arranged, and an adjustment shaft by means of which the support cone is vertically movable from below. A hollow space is arranged inside the main shaft, the adjustment shaft is arranged to the hollow space, a load cylinder is arranged to a lower end of the main shaft which load cylinder comprises an adjustment piston acting to a lower end of the adjustment shaft, a pressure medium supply is arranged to a pressure volume under the adjustment piston for moving vertically the adjustment shaft, and a lubricant supply is arranged above the adjustment piston for directing lubricant via the hollow space to targets to be lubricated.

Abstract: A gyratory cone crusher 10 includes a support frame 12 having a vertical axis X and a receiving formation 14 mounted rigidly in the frame 12, a central vertical axis of the receiving formation 14 being in line with vertical axis X. A crushing head 16 is slideably engaged with the receiving formation 14 and has a first, upwardly presented conical crushing surface 18. A crushing bowl 20 having a second, downwardly presented funnel-shaped second crushing surface 22 spaced apart from the first crushing surface 18 is mounted above the crushing head 16. The crushing bowl 20 is mounted in an eccentric housing 24 so that a central axis Z of the crushing bowl 20 is positioned at an angle oblique to vertical axis X.

Abstract: There is described a crushing plant and a method for controlling the same. The crushing plant includes a crusher (1) and a feeding arrangement (3), and is driven by a diesel engine (13). A load value related to the diesel engine is retrieved e.g. by means of a J1939 interface. If the retrieved value exceeds a predetermined threshold value, the control loop of the feeding arrangement (3) is altered. Thereby it can be avoided that the diesel engine (13) stalls, such that continuous operation of the crushing plant may be ensured.

Abstract: A gyratory crusher is provided that has a crusher head, an eccentric assembly connected to the crusher head, a bushing positioned between the eccentric assembly and the crusher head, a retaining member, and a plurality of fasteners. The retaining member has an opening and a plurality of holes. The retaining member is positioned adjacent to the eccentric assembly such that a portion of the eccentric assembly is within the opening. Each fastener extends through a respective hole to the crusher head. The retaining member is positioned adjacent to the crusher head and the eccentric assembly such that the retaining member is decoupled from the bushing. The cone crusher is preferably configured to crush rock, stone, ore or minerals. A method of making or retrofitting a crushing device such as, for example, a cone crusher or other gyratory crusher, is also provided.

Abstract: There is described a crushing plant and a method for controlling the same. The crushing plant involves a gyratory crusher (1) with means for controlling a minimum gap in a crushing chamber, and is driven by a diesel engine (18). A load value is retrieved from the diesel engine e.g. by means of a J1939 interface. If the retrieved value exceeds a predetermined threshold value, the minimum gap is increased. Thereby it can be avoided that the diesel engine stalls; such that continuous operation of the crushing plant may be ensured.

Abstract: A crusher comprising at least a main shaft having an axial line and being mounted on the inner frame of the crusher, an eccentric comprising at least a first eccentric bushing and a second eccentric bushing, a first crushing blade, and a second crushing blade. The first crushing blade is fitted to move along an eccentric path, which path can be adjusted by changing the mutual position of the first eccentric bushing and the second eccentric bushing of the eccentric. The second eccentric bushing comprises a gear transmission for rotating the eccentric, and the crusher comprises adjusting means for changing the mutual position of the gear transmission of the first eccentric bushing and the gear transmission of the second eccentric bushing.

Abstract: A central shaft for a gyratory crusher, which includes a crushing head on which a first crushing shell is mounted; a frame on which a second crushing shell is mounted, which second crushing shell defines, together with the first crushing shell, a crushing gap; and a driving device, which is arranged to rotate an eccentric about said central shaft and thereby to cause the crushing head to execute a gyratory movement for crushing of material that is introduced in the crushing gap. The central shaft has a cavity in which are accommodated an anti-reverse and a torque limiter, the anti-reverse and the torque limiter being adapted for connection to said crushing head for restricting spinning.

Abstract: A crushing chamber is formed between a concave liner and a mantle liner. The concave liner has a first area surface having a length of T to ?2T; a second and a third area surface; which surfaces are gradually inclined from the side of the inlet for the crushing chamber. The mantle liner has a first tapered surface having a length of greater than T, a cross angle of less than 20° and an inclination angle of greater than 60°; a second tapered surface having a length of greater than 0.5T and a cross angle of 5° to 10°; and a third tapered surface having an inclination angle of 45° to 50°. The area surfaces as well as the tapered surfaces are continuously arranged in a curvilinear manner. The shapes enhance the throughput of goods in a good fine-crushing performance, reducing the uneven abrasion due to the action.

Abstract: The machine is comprised of a main body (32), a bonnet (14) which rests on the upper frame of the main body (32) and a concave holder (66) threadably inserted into the bonnet (14). The bonnet (14) is maintained in intimate contact with the main body (32) by means of a plurality of tramp iron cylinders (18) while the concave holder (66) is screwed into the bonnet (14) by means of an adjusting gear (16) and matching pinion (58). The concave holder (66) is locked in position within the bonnet (14) by means of a plurality of locking cylinders (60) positively engaging a locking slide ring (64). A mantle (70) covered male conical member (28) is driven by a crown gear (36) and pinion (52) in an elliptical rotation within the confines of a concave die (68) thus crushing the raw rock on each near pass.

Abstract: A crusher comprises a main shaft a portion of which is disposed in a bore of a rotatable eccentric shaft, the main shaft (1) having a central axis that is inclined with respect to the axis of rotation of the eccentric shaft, and a first crushing head attached to the main shaft and rotatable by the main shaft with respect to a second crushing head so that constrained stroke motion is effected between the first crushing head and the second crushing head. The inclination of the central axis of the main shaft is changed with respect to the axis of rotation of the eccentric shaft by a gear transmission comprising cog wheels, such that the magnitude of the constrained stroke motion changes.

Abstract: An improved main shaft for a coal pulverizer having a selected portion of the main shaft provided with an intervening material such as a thermally sprayed ceramic coating.

Abstract: The gyratory crushing apparatus includes a bowl having an inner wall which defines a chamber for receiving frangible or friable material to be crushed, the chamber having a central axis and terminating in a throat defining a central discharge opening, a crushing head disposed in the bowl and having upper and lower ends which are interconnected by a peripheral wall which is concentric with respect to a gyratory axis of the head, a support assembly by which the head is supported in the chamber and which includes a shaft, and a drive arrangement coupled to the shaft. The shaft is of integral construction having upper and lower portions, and the head is mounted on the upper portion, with the upper portion having an axis substantially co-incident with the gyratory axis of the head.

Abstract: A gyratory crusher having a frame with a lower frame portion, a crusher head, a mounting mechanism for pivotally and gyrationally mounting the crusher head on the lower frame portion such that the crusher head operably gyrates between a closed side setting and a corresponding open side setting, a seal mechanism for operably protecting the mounting mechanism. The seal mechanism includes a flexible member having an outer edge, sealingly connected to the crusher head, and an inner edge, sealingly connected to the lower frame portion by an outer bearing race secured to the inner edge, an inner bearing race secured to the lower frame portion, and bearing balls captured between the outer and inner bearing races. The flexible member may have a single wall structure with a corrugation-like configuration, or a double wall structure with an inflatable bladder therebetween.

Abstract: The application presents an adjustable cone crusher which has a hydraulic cylinder-plunger-combination (15, 4) for adjusting the setting and supporting a main shaft at its bottom end. The combination contains a bypass channel (21), through which the pressure medium escapes from the cylinder when the combination has been extended by a certain distance. In this way the crushing cone is prevented from rising too much upwards.

Abstract: The invention is a crusher having a fixed crusher member and a vertically reciprocating crusher member. Reciprocation of the crusher member is achieved by a pivoting arm located beneath the crusher member which is preferably driven by a toggle mechanism located to one side of the crusher.

Abstract: A gyratory crusher of the type including a frame with a bowl mounted on the frame and a head cooperable with the bowl in crushing operations. The head is rotatably mounted on an eccentric which is driven through suitable gearing. The head is positively rotated by a drive means either independent of or integral with the drive for the eccentric. The bowl is free to rotate about the frame. The rotary motion imparted to the head serves to induce centrifugal force to the particles of material within the crushing chamber. This centrifugal force, when combined with the gravitational force acting on the particles of material, results in the material moving through the crushing chamber in a trajectory which follows the configuration of the crushing chamber.

Abstract: The automatic random reset torque limiter of the invention, connected between the crushing head of a gyratory crusher and its one-way anti-spin clutch, comprises a carrier element and a coaxial detent element that have end surfaces opposing one another across a small gap. The carrier has wells opening to its end surface that are equidistant from its axis and are uniformly spaced from one another. The detent element has hemispherical cavities in its end surface, one for each well, each alignable with a well. In each well is a coiled compression spring and a ball. The spring normally holds the ball engaged in a cavity but allows it to ride out of the cavity and roll on the detent element end surface while excessive torque persists.

Abstract: A rolling bearing arrangement for a cone crusher comprising a vertical drive shaft arranged within a housing and in alignment with a conical crusher jacket, the upper end of the drive shaft being slightly inclined to the axis of the crusher jacket and having a crusher cone mounted on said upper end, the crusher cone being supported by at least one radial rolling bearing and by a first thrust rolling bearing arranged at the lower end of the crusher cone, characterized by a second thrust rolling bearing arranged above the radial rolling bearing between the drive shaft and spring-elastic means (12) are provided which take support on the one hand on the shaft (2) and, on the other, on the end face of the thrust rolling bearing (11) away from the thrust rolling bearing (10) and in so doing brace these two thrust rolling bearings against one another.