A gyratory crusher hydraulic pressure relief valve includes a hydraulic fluid vestibule arranged to be fluidly connected to a hydraulic fluid space. A logic element is arranged to dump hydraulic fluid from the hydraulic fluid space, which includes a plunger having a first plunger surface and a second plunger surface, and a control pipe arranged for fluidly connecting the second plunger surface to the hydraulic fluid vestibule. A supply orifice restricts the flow of hydraulic fluid from the vestibule towards the second plunger surface to make the time TC it takes for the logic element to switch from open position to closed position exceed the time TF it takes for a closed side setting position of the crusher to make one full round.

The present invention relates to a system for detecting and handling an overload event in a crusher system. The system comprises a crusher system a crusher for comminution of material. The crusher comprises a clamping arrangement, and a clamping pressure sensor configured to measure a clamping pressure of the clamping arrangement. A processing unit communicatively connectable to the clamping pressure sensor, where the processing unit is configured to output an alarm signal and/or an instruction adjust an operation parameter of the crusher system, based on a received clamping pressure signal.

A grinding apparatus includes a receptacle, a grinding element and a drive means. The receptacle has a receptacle inner wall defining a receptacle cavity. The receptacle inner wall is in the general form of a surface of a revolution extending about a central vertically extending receptacle axis. The receptacle is rotatable about the receptacle axis. The grinding element has a grinding element outer wall in the general form of a surface of revolution extending about a central vertically extending grinding element axis.

A grinding apparatus includes a receptacle, a grinding element and a drive means. The receptacle has a receptacle inner wall defining a receptacle cavity. The receptacle inner wall is in the general form of a surface of a revolution extending about a central vertically extending receptacle axis. The receptacle is rotatable about the receptacle axis. The grinding element has a grinding element outer wall in the general form of a surface of revolution extending about a central vertically extending grinding element axis.

A mantle clamp configuration designed to lock the mantle in place on a rock crusher includes a clamp plate assembly with a clamp plate with holes; a plurality of clamp bolts that are inserted through the holes; and optionally a dust cover with dust cover bolts. The configuration also may also include modified original equipment manufacturer (OEM) assembly including modified locking collar; new locking collar bolts to accept the clamp bolts; and burn ring modified to fit the overlying clamp plate.

A gyratory crusher shell has an annular wall extending around a longitudinal axis. A plurality of ears project radially outward from an annular rim of the topshell with each ear including a respective lug to sit within a corresponding recess at an annular rim of the topshell to rotatably lock the crushing shell at the topshell.

A cone crusher apparatus having a bowl liner removably mounted within a bowl. A wedge is radially adjustable between an inside surface of the bowl and an outside surface of the bowl liner. The wedge moves radially between a rotation-preventing position and a rotation-permitting position. In the rotation-preventing position, the wedge is in simultaneous abutment with the bowl and bowl liner and through that simultaneous abutment immediately develops a maximum holding force such that relative motion between the bowl liner and bowl in a first rotational direction is prevented. In the rotation-permitting position, the wedge is not in simultaneous abutment with the bowl and bowl liner and at least some relative motion between the bowl liner and bowl in the first rotational direction is permitted.

A gyratory crusher and system for determining a close-side setting or an open-side setting is provided including a point cloud generator mounted proximate the crusher; a drone; a laser emitter mounted on the drone to mark the first trace on the mantle at a predetermined position of the gap; a camera mounted on the drone to capture a series of image of the first trace as the mantle of the gyratory crusher rotates; and a computer in communication with the camera, the point cloud generator and the drone, the computer comprising a memory and a processor, the memory providing instructions to process the image to provide a gap width and to determine at least one of a close-side setting or an open-side setting from the gap width.

A gyratory crusher and system for determining a close-side setting or an open-side setting is provided including a point cloud generator mounted proximate the crusher; a drone; a laser emitter mounted on the drone to mark the first trace on the mantle at a predetermined position of the gap; a camera mounted on the drone to capture a series of image of the first trace as the mantle of the gyratory crusher rotates; and a computer in communication with the camera, the point cloud generator and the drone, the computer comprising a memory and a processor, the memory providing instructions to process the image to provide a gap width and to determine at least one of a close-side setting or an open-side setting from the gap width.

A gyratory cone crusher includes a first and a second crushing shell defining a crushing gap. The first crushing shell is arranged to gyrate around a vertical axis, in order to crush material entering the crushing gap, and is vertically supported by a thrust bearing including first and second bearing plates defining a spherical sliding interface. One of the bearing plates has one or more cooling and/or lubricating grooves at the sliding interface, each groove defining a channel, extending from the center of the sliding interface to the periphery thereof. In order to obtain a uniform distribution of grooves, the cooling/lubricating grooves are in the form of one or more spirals extending from the center of the sliding interface to the periphery thereof. The disclosure further relates to a bearing plate and a kit of bearing plates involving such a bearing plate.