An impact crusher for mineral material includes a crusher housing, a reversible rotor arranged in an impact-grinding space of an impact mechanism for propelling mineral material against wear members in the crusher housing; and an adjustment installation setting a spacing of the impact mechanism from the rotor. An upper impact space adjoins the impact-grinding space at the top and has an entry opening for the mineral material. The upper impact space has an upper height region that neighbors the entry opening, a central height region that adjoins the upper height region, and a lower height region that is contiguous to the lower impact-grinding space, with the central height region being a region having a largest internal width and at a widest location thereof, which is above a crushing circle of the rotor, has a maximum width which is larger than a diameter of the crushing circle of the rotor.

A method for detecting wear in crushers, having a wearing part (2) mounted on a drive shaft (1), during idle operation is described in which downtimes that impair crusher productivity can be eliminated and nevertheless reliable wear detection is made possible with low risk of injury to machine operators. The drive shaft (1) is accelerated from a starting angular speed (oil) to an end angular speed (ω2) with a specified acceleration, and the drive energy required for this is ascertained, whereupon the wear of the wearing part (2) is ascertained as the value assigned to the required drive energy in a specified wearing-part characteristic curve (3, 4, 5).

The impact shield (9, 10) carries a plurality of armor bodies (16) of a strongly wear resisting material. The armor bodies (16) are fixed horizontally in succession on a front side of the impact shield by a fixing element making it possible to detach them from the impact shield (9, 10) for their replacement. The impact shield (9, 10) is composed of a fixed part (21) connected to the frame (2), and a removable part (22) carrying the armor bodies (16) and making it possible to remove simultaneously all the armor bodies, fixed on the same, out of the grinding chamber (3). At least one such impact shield (9, 10) is arranged in a grinding chamber (3) of an impact grinding mill including a frame (2) further including a horizontal-axis rotor (6) provided with impactors (7) arranged regularly around its periphery.

A device for breaking glass articles, such as bottles, the device comprising an inlet to receive an article. A conduit links the inlet with a glass-breaking chamber, and the chamber houses a glass-breaking member, said glass-breaking member being rotatably mounted for rotation in a vertical plane, and to impact a bottle as a bottle enters the chamber. A motor is linked via a horizontally rotating axle to rotate the glass-breaking member. An obliquely mounted crusher plate is located such that as the glass-breaking member rotates and impacts a glass article, which is forced against the crusher plate by the glass-breaking member to aid breakage of a glass article. A collector is included in which broken glass is retained ready for removal from the device. An intermediate collector is also included to temporarily retain broken glass, including a release valve allowing broken glass to pass from the intermediate collector to the collector, via an aperture therebetween.

A device for breaking glass articles, such as bottles, the device comprising an inlet to receive an article. A conduit links the inlet with a glass-breaking chamber, and the chamber houses a glass-breaking member, said glass-breaking member being rotatably mounted for rotation in a vertical plane, and to impact a bottle as a bottle enters the chamber. A motor is linked via a horizontally rotating axle to rotate the glass-breaking member. An obliquely mounted crusher plate is located such that as the glass-breaking member rotates and impacts a glass article, which is forced against the crusher plate by the glass-breaking member to aid breakage of a glass article. A collector is included in which broken glass is retained ready for removal from the device. An intermediate collector is also included to temporarily retain broken glass, including a release valve allowing broken glass to pass from the intermediate collector to the collector, via an aperture therebetween.

An impact crusher is provided which comprises a frame defining a crushing chamber, a rotor provided with at least one hammer, at least one impact apron plate, and a rotor positioning device configured to adjust a rotational position of the rotor. The rotor positioning device comprises a piston motor coupled to the rotor and having a cylinder block comprising a plurality of cylinders; a plurality of pistons, a respective piston being slidably mounted in a respective cylinder; and a surface against which the pistons are configured to exert a force. The cylinder block and the surface are arranged for relative rotation, and the cylinder block or the surface is operatively coupled to the rotor, such that relative rotation of the cylinder block and the surface causes rotation of the rotor. The rotor positioning device is operable in first and second modes.

The invention relates to a crusher, in particular a rotary impact crusher, cone crusher or jaw crusher, having a crusher unit (10), which has a movable first crusher body (11), in particular a rotor or a crusher jaw, wherein a second crusher body (14), in particular an impact rocker or a crusher jaw, is assigned to the first crusher body (11), wherein a crushing gap (15) is formed between the crusher bodies (11, 14), wherein an overload triggering device (30) is coupled to the first crusher body or to the second crusher body, which overload triggering device has a hydraulic cylinder (20) and which overload triggering device is designed to permit a motion of the coupled crusher body (11, 14) increasing the width of the crushing gap (15), wherein the hydraulic cylinder (20) has a pressure chamber (24), which is delimited by means of a piston (23), and wherein the overload triggering device (30) has a pressure valve (31) which, in its open position, establishes a fluid-conveying connection between the pressure chamber (24) and a low-pressure area and, in the closed valve position, blocks this connection. The productivity and operational safety of such a crusher can then be increased if provision is made that the overload triggering device (30) has a high-pressure valve (40), which, as a result of an overload situation, in its open position establishes a fluid-conveying connection between the pressure chamber (24) of the hydraulic cylinder (20) and a low-pressure area and, after the overload situation has ended, is moved into a closed position to block this connection, and in that the triggering pressure required to open the pressure valve (31) is lower than the triggering pressure required to open the high-pressure valve (40).

Various embodiments of horizontal shaft impact (“HSI”) crusher systems, methods and apparatus are disclosed herein. Some HSI crusher embodiments are provided an adjustable feed angle. Some HSI crusher embodiments are provided with an adjustable curtain position.

The invention relates to an overload protection device for the hydraulic system of a mineral material machining plant, in particular for a rotary impact crusher, a jaw crusher or the like, wherein a hydraulic element equipped to store and/or convey a hydraulic fluid is provided, wherein the hydraulic element comprises a connection area (95) having a passage opening for hydraulic fluid of the hydraulic system, wherein the passage opening is covered by a replaceable burst panel (100), wherein a burst panel holder (96) is disposed on the rear face (101) of the burst panel (100) facing away from the connection area (95), and wherein at least one fastening bolt (97) is passed through a bolt mount (96.4) of the burst panel holder (96) and through a drilled hole (103) of the burst panel (100) disposed in alignment therewith and is bolted into a threaded mount of the connection area (95) in such a way that in the assembled state the burst panel (100) is held clamped between a pressure surface (96.2) of the burst panel holder (96) and a connection surface (95.1) of the connection area (95). To make provision for an easy maintenance after an overload event for such an overload protection device, provision is made in accordance with the invention that at least one retaining element (98) is provided, which, in a dismantling position, holds the burst panel holder (96) to the hydraulic element, in particular at the connection area (95), when the at least one fastening bolt (97) is unbolted from the threaded mount of the connection area (95) and the burst panel (100) is removed.

An autogenous impact mill (10) is operative to size reduce friable material particles processed through operation of the mill. At least one impeller (58) rotatable within an interior area (44) of a housing (12) of the mill is operative to produce one or more air jets. The air jets are operative to suspend material particles using the Coanda Effect. Other particles moved by the air jets bounce off ricochet bars (74) and impact suspended particles so as to break and reduce the particles to a suitable size to pass through a screen (110) to an outlet opening (42).