Abstract: A mineral material processing plant, a crusher and an upper frame for a crusher. The upper frame includes a central hub for receiving a main shaft of the crusher, an upper rim, and a spider arm. A u-shaped cavity extends towards a lower flange from the upper rim.

Abstract: An anti-spin arrangement for a gyratory crusher including at least one seal element configured to provide sealing of the top bearing of the gyratory crusher and at least one anti-spin element configured to reduce the spinning of the head of the crusher. The arrangement further includes a first adjustment element and a second adjustment element, wherein the at least one seal element and the at least one anti-spin element are configured to be individually adjusted with the first adjustment element and the second adjustment element respectively. A gyratory crusher, a mineral material processing plant and a method of adjusting an anti-spin arrangement of a gyratory crusher are also disclosed.

Abstract: A gyratory crusher spider arm shield for releasable mounting to a spider arm is mounted in a position above and around the spider arm via locating feet and is maintained in the position by a fixating ring extending circumferentially around the spider arms and positioned at and above a perimeter of the spider.

Abstract: A gyratory crusher spider wall shield for releasable mounting to a radially inward facing face of a spider positioned on top of a shell of a gyratory crusher includes a primary protection wall positionable over the inward face of the spider and a rear wall attachable to an outer annular fixating ring positionable axially intermediate a material input hopper and the spider.

Abstract: The invention relates to a gyratory crusher for comminuting material to be crushed, comprising a crusher housing, in which a crusher shaft is arranged, said shaft being held in the crusher housing so that it can tumble about a vertical axis. To accommodate the crusher shaft, the crusher is provided with a cross member which extends diametrically across the crusher housing and the cross member ends of which are connected to the crusher housing. According to the invention, the connection of the cross member ends to the crusher housing has at least one hydraulic tensioning device.

Abstract: A retractor, particularly for cranial surgery, having two articulated parts that can be pivoted relative to each other about a rotary axis, wherein each articulated part has a handle part on the proximal end and a retracting element on the distal end, wherein a section of each articulated part spans a plane and wherein a clamping arm is arranged on at least one of the articulated parts. The clamping arm has multiple tensioning elements, which are threaded onto a traction cable and engage with each other and can be tilted and rotated relative to each other, wherein the clamping arm is arranged about a pivotal axis and the pivotal axis is connected to the articulated part by an arm arranged in a plane, wherein the arm is aligned outwards from the articulated part and the pivot axis is positioned in the plane at a distance from the articulated part.

Abstract: A cone-shaped crusher according to the invention includes a frame having a cavity; a main shaft that is disposed in the cavity; main shaft driving means for driving the main shaft such that the main shaft performs a gyratory movement; a mantle core assembly body that performs a gyratory movement together with the main shaft; a suspension bearing chamber capable of accommodating an upper end portion of the main shaft; and a suspension bearing. According to the cone-shaped crusher, there are advantages in that damage to the suspension bearing can be minimized, the gyratory movement of the main shaft can be stably performed, and a suspension bearing part can be used semi-permanently without requiring replacement.

Abstract: A gyratory crusher frame part and a gyratory crusher include a topshell and spider assembly configured to minimize stress concentrations. An annular flange is formed at the junction between a lower region of each spider arm and an upper region of the topshell. Optimization of loading force transfer and a reduction in stress concentration is achieved by positioning the spider arms radially inward relative to an outer circumferential perimeter of the flange.

Abstract: A gyratory crusher frame part includes a topshell mountable on a bottom shell, the topshell having an annular wall extending around a longitudinal axis. A spider having a plurality of arms extending radially outward from a cap is positioned at the longitudinal axis. Each arm has a first portion extending in a radially outward direction from the cap and a second portion extending in an axial direction from an outer region of the first portion. An annular flange is positioned between the second portion of each arm and the annular wall. The annular wall is defined between an outward and inward facing surface of the annular wall. A section of the wall neighbouring the flange includes a concave section at the outward facing surface. A first half of the concave section closest to the flange is a substantially uniform curve extending continuously in the circumferential direction around the longitudinal axis.

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-shaped crusher according to the invention includes a frame having a cavity; a main shaft that is disposed in the cavity; main shaft driving means for driving the main shaft such that the main shaft performs a gyratory movement; a mantle core assembly body that performs a gyratory movement together with the main shaft; a suspension bearing chamber capable of accommodating an upper end portion of the main shaft; and a suspension bearing. According to the cone-shaped crusher, there are advantages in that damage to the suspension bearing can be minimized, the gyratory movement of the main shaft can be stably performed, and a suspension bearing part can be used semi-permanently without requiring replacement.

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: A gyratory crusher comprises a first crushing shell mounted on a crushing head, and a second crushing shell mounted on a machine frame, a crushing gap being formed between said first and second crushing shells. A method of controlling the operation of said crusher comprises measuring a parameter being representative of the stresses to which the crusher is exposed during the crushing of material, determining an average value of said parameter, determining a deviation value of said parameter, calculating a peak value based on said average value and said deviation value, comparing said peak value to a reference value, and controlling the operation of the crusher in view of said comparison between said peak value and said reference value.

Abstract: A spider for use with a gyratory crusher. The spider includes spider arms each formed from two spaced flanges joined by a connecting web to define an open channel having an open top end. The configuration of the spider arms increases manufacturability and provides the required strength and rigidity for the spider. The channel formed in each spider arm is covered by a spider arm shield to reduce abrasive wear to the spider arm.

Abstract: The apparatus is a gyratory crusher in which all the wear parts can be removed and replaced from the top of the crusher, thus eliminating the need to remove large, heavy parts from below the crusher. This is accomplished by constructing the crusher so that the eccentric and the piston assembly can be lifted up and out sequentially. The piston assembly then includes all the wear parts within the lowest assembly, the hydraulic support, so that those parts can be replaced without access to the underside of the crusher. If necessary, the hydraulic support within which the piston assembly is held can also be removed from above the crusher.

Abstract: A gyratory crusher includes a crushing head on which a first crushing shell is mounted, and a frame on which a second crushing shell is mounted. The crusher has a thrust bearing which is made up of horizontal bearing plates and which is located between a vertical shaft and a piston arranged vertically below the vertical shaft. The crusher further has a first space, which is adapted to receive a variable amount of pressurized liquid, the first space being defined by the piston and a piston housing formed in the frame, and a second space which is adapted to receive, by way of a duct, pressurized liquid from the first space, the second space being located between the vertical shaft and the piston and at least partly accommodated in an opening in at least one of the bearing plates. The first space and the second space are adapted, by the liquid, to transmit forces from the crushing head to the piston housing, in order that the load on the thrust bearing is relieved.

Abstract: A cone crusher includes a stationary main shaft and an eccentric that rotates about the main shaft to cause gyrational movement of a head assembly to crush rock within a crushing gap. The cone crusher includes a lower head bushing in contact with an outer surface of the eccentric. The eccentric is formed with a contact pad to enhance the contact between the eccentric and the lower head bushing during a no-load condition. The contact pad includes a contact surface that is recessed from the outer surface of the eccentric to enhance contact during no-load conditions while maintaining full contact between the lower head bushing and the eccentric outer surface during full load, crushing conditions.

Abstract: A cone crusher includes a stationary main shaft and an eccentric that rotates about the main shaft to cause gyrational movement of a head assembly to crush rock within a crushing gap. The cone crusher includes a lower head bushing in contact with an outer surface of the eccentric. The eccentric is formed with a contact pad to enhance the contact between the eccentric and the lower head bushing during a no-load condition. The contact pad includes a contact surface that is recessed from the outer surface of the eccentric to enhance contact during no-load conditions while maintaining full contact between the lower head bushing and the eccentric outer surface during full load, crushing conditions.

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: 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 {square root}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: A spider sleeve and seal apparatus for a gyratory crusher has upper and lower cylindrical sleeves disposed between the spider and a vertically slidable piston. Fixed o-rings are located between the sleeves and the spider, and moving seals are located in the piston. These seals prevent leakage from the hydraulic ring used to support the piston and shaft of the gyratory crusher.

Abstract: A cone crusher includes a frame, a shaft supported by the frame, and a head disposed on the shaft. An eccentric mechanism is coupled to the head. A one-way clutch is coupled to the shaft, and a friction torque limiting clutch is disposed within the head and coupled between the head and the one-way clutch.

Abstract: The head nut assembly for gyratory crusher which includes a shaft having a lower portion, a tapered middle portion and a threaded upper portion. The threaded upper portion extends above the tapered portion. A mantle encompasses the middle tapered portion and has a correspondingly tapered internal side. The internal side is in generally continuous supportive engagement with the shaft middle portion. The mantle additionally has an upper side. A head nut is threadably secured to the upper portion of the shaft. The head nut has a lower face, where at least one bore extends upwardly into the lower face. An annular ring is disposed around the shaft between the mantle and the head nut. The ring has a lower surface coupled with the upper side of the mantle so as to prevent relative rotational movement between the mantle and the ring. An upper surface on the ring is contiguous with the lower face of the head nut. At least one key is disposed between the head nut and the annular ring.

Abstract: A socket seal for a gyratory crusher is comprised of a ring with a pair of lips extending therefrom. The ring can have an outwardly expanding dovetail which is inserted into a slot in the piston or hemispherical bearing socket. The seal prevents downward flow of oil from the lubricated space between the hemispherical bearing ball and socket.

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: An improved main shaft and assembly for a coal pulverizer having a circumferential groove at a predetermined location on the main shaft and in the yoke bushing to provide improved fretting resistance to reduce the occurrence of main shaft failure.

Abstract: The head nut assembly for gyratory crusher which includes a shaft having a lower portion, a tapered middle portion and a threaded upper portion. The threaded upper portion extends above the tapered portion. A mantle encompasses the middle tapered portion and has a correspondingly tapered internal side. The internal side is in generally continuous supportive engagement with the shaft middle portion. The mantle additionally has an upper side. A head nut is threadably secured to the upper portion of the shaft. The head nut has a lower face, where at least one bore extends upwardly into the lower face. An annular ring is disposed around the shaft between the mantle and the head nut. The ring has a lower surface coupled with the upper side of the mantle so as to prevent relative rotational movement between the mantle and the ring. An upper surface on the ring is contiguous with the lower face of the head nut. At least one key is disposed between the head nut and the annular ring.

Abstract: A bearing block mounting arrangement of a cone crusher in which the bearing block includes an upper block and a bottom block respectively covered on top and bottom sides of a spider bearing around a main shaft, the upper block and the bottom block each having an outward flange and a plurality of locating holes and screw holes alternatively arranged around the spider bearing, the locating holes on the outward flange of the upper block being respectively connected to the locating holes on the outward flange of the bottom block and respective locating holes on a locating block inside the cone crusher by screw bolts and nuts, and a plurality of adjustment screws respectively threaded into the screw holes on the upper block and the bottom block and stopped at top and bottom sides of the locating block for adjusting the gap between the upper block and the bottom block.

Abstract: A gyratory crusher for crushing frangible or friable material where the crushing head is supported for drive in gyratory movement within the bowl, in which the head gyrates on a gyratory axis which is inclined with respect to, and intersects the central axis of the bowl, at an angle which is substantially fixed in use of the crusher. The head is supported by a bearing system including a first bearing component which is secured in relation to the crushing head and a second component which is mounted in relation to a frame. Drive is achieved by a mechanical arrangement in which, during its gyratory motion, the gyratory axis traverses a substantially fixed cone of revolution which has its apex at the intersection of the gyratory axis and the central axis of the bowl.

Abstract: A method and apparatus of comminuting ore-like material to produce a disproportionately large volume of flakier product which is easily and more efficiently ground in a mill, wherein the method includes the application of a stream of liquid all around the inlet of a conical crusher, increasing the speed and reducing the throw of the crusher to produce a generally flaky product, crushing the ore in the presence of the liquid and passing the ore and liquid slurry directly to a grinding mill.

Abstract: In a gyratory crusher, a main shaft having a tapered mantle supporting portion extending through a correspondingly tapered bore in the crusher mantle to support the mantle on the shaft, and a bearing sleeve fitted about the end of the shaft releasably securing the crusher mantle to the tapered portion of the shaft.