A gyratory crushing apparatus for frangible or friable material comprises: a bowl having a chamber for receiving the material and a discharge opening disposed at the base with a central axis and a gyratory axis extending at an angle to the central axis; a crushing head and a drive assembly. The discharge opening defines a throat with a circumferential wall and the crushing head is disposed within the discharge opening. The crushing head has a crushing face in spaced relation to the circumferential wall of the throat defining a nip between the circumferential wall and the crushing face. The drive assembly includes a transmission and a rotatable eccentric shaft for driving the crushing head within the bowl and about the gyratory axis in a notating motion. The bowl also comprises a feed section and a discharge section, each defined by a wall and spaced by a mid-section, wherein thickness of a wall defining the mid-section is greater than a thickness of the discharge section wall.

A cone crusher and an adjustable moving cone assembly thereof are provided. The adjustable moving cone assembly includes a base, an eccentric bushing movably provided inside the base, a main shaft with a lower end movably provided inside the eccentric bushing, and a moving cone body fastened at an upper end of the main shaft. The eccentric bushing rotates to directly or indirectly drive the moving cone body to swing circumferentially. A lifting drive component is provided on the base. An upper end surface of the lifting drive component is provided with a support assembly. A lower end of the moving cone body is supported by rolling or sliding on the support assembly. The lifting drive component is configured to drive the moving cone body and the main shaft connected to the moving cone body to move up and down.

The invention relates to a comminuting machine such as a crusher, a mill, or the like, wherein the material to be comminuted is guided through a gap which is formed between at least one wear layer attached to a component of the comminuting machine and a counter surface and the extension of which varies as the wear of the at least one wear layer progresses. The invention is characterized in that in order to determine the wear occurring on the wear layer and/or in order to determine the effective extension of the gap between the wear layer and the counter surface, a radar antenna is provided which is oriented towards the corresponding counter surface. The radar antenna comprises an antenna region and a wear part which is paired at least with the wear layer region provided for a permissible wear and which shortens as the wear layer wears down.

A cone crusher and an adjustable moving cone assembly thereof are provided. The adjustable moving cone assembly includes a base, an eccentric bushing movably provided inside the base, a main shaft with a lower end movably provided inside the eccentric bushing, and a moving cone body fastened at an upper end of the main shaft. The eccentric bushing rotates to directly or indirectly drive the moving cone body to swing circumferentially. A lifting drive component is provided on the base. An upper end surface of the lifting drive component is provided with a support assembly. A lower end of the moving cone body is supported by rolling or sliding on the support assembly. The lifting drive component is configured to drive the moving cone body and the main shaft connected to the moving cone body to move up and down.

A method and apparatus for counteracting spin of the crusher head on cone or gyratory crushers is provided. An annular rubber muscle element is secured relative to said bowl frame and positioned between the bowl frame and a surface of the head, and which can be selectively placed into contact under pressure with the surface of the head to prevent spin during start up but which is then released during normal crushing operation.

There is disclosed a crusher for crushing material into finer particulates, the crusher including a housing that encloses a crushing head mounted on a shaft. The housing supports an outer crushing shell, while the crushing head supports an inner crushing shell. The two crushing shells cooperate to form a crushing gap therebetween. The crusher further includes a drive mechanism joined to the shaft for generating movement of the inner crushing shell relative to the outer crushing shell. The drive mechanism includes at least three drive units joined to the shaft and configured to impart a pulling force on the shaft. Also disclosed is a method of operating the crusher, wherein each of the drive units are selectively activated and deactivated to selectively generate orbital or gyratory movement of the crushing head relative to the outer housing.

There is disclosed a crusher for crushing material into finer particulates. The crusher includes a housing enclosing a cone assembly comprising a crushing head mounted on a shaft. The housing supports an outer crushing shell, while the crushing head supports an inner crushing shell. The two crushing shells cooperate to form a crushing gap therebetween. A cam is provided on the shaft with the cam being located remote from the crushing head. A number of drive units extend between the cam and the housing, wherein each drive unit has a first end movably abutting the cam and a second end movably abutting a discrete spherically domed reaction seat provided on the housing. Each drive unit is a telescopic body with a bore extending therethrough so that hydraulic fluid injected into each bore applies a drive force onto the cam and the reaction seat to cause movement of the crushing head.

A mineral material processing plant, a crusher, a lubrication method and system, the system including a thrust bearing, a lubrication piston and adjusting piston arranged to be movable in a cylinder. The piston includes a first space configured to receive fluid and to continuously conduct the fluid to the thrust bearing. The cylinder and the piston define therebetween a second space configured to receive and hold fluid. The system is configured to, in response to detecting a downward movement of the piston, conduct fluid to the first space.

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.

A crusher device such as a cone or gyratory crusher is disclosed. The crusher device includes a shaft defining a first direction parallel to its length. The shaft includes an upper shaft end, a crusher head, and an overload safety device that couples the crusher head to the upper shaft end. The overload safety device includes a biasing device configured to bias the crusher head away from the upper shaft end in the first direction. The overload safety device is configured to permit displacement of the crusher head along the first direction relative to the shaft in response to a force acting on the crusher head in the first direction.