A tramp iron relief system for a crusher. The preferred system includes a tramp iron relief cylinder, a relief valve adapted to open when oil pressure within said tramp iron relief cylinder exceeds a pre-designated limit, a tramp iron relief cylinder manifold block that is adapted to control the flow of oil into and out of the tramp iron relief cylinder, a tension cylinder, a tension cylinder manifold block adapted to control the flow of oil into and out of the tension cylinder, a tank line accumulator, and a hydraulic line to convey oil between the tank line accumulator, the tramp iron relief cylinder, and the tension cylinder. A method for controlling the movement of the tramp iron relief cylinder including reducing the pressure in the rod end of the tramp iron relief cylinder during normal operations of the crusher.

A tramp iron relief system for a crusher. The preferred system includes a tramp iron relief cylinder, a relief valve adapted to open when oil pressure within said tramp iron relief cylinder exceeds a pre-designated limit, a tramp iron relief cylinder manifold block that is adapted to control the flow of oil into and out of the tramp iron relief cylinder, a tension cylinder, a tension cylinder manifold block adapted to control the flow of oil into and out of the tension cylinder, a tank line accumulator, and a hydraulic line to convey oil between the tank line accumulator, the tramp iron relief cylinder, and the tension cylinder. A method for controlling the movement of the tramp iron relief cylinder including reducing the pressure in the rod end of the tramp iron relief cylinder during normal operations of the crusher.

The invention relates to a high-pressure pump for the overload protection of a crusher unit (20), in particular a jaw crusher, with an actuator unit (100) which adjustably receives an actuation element (110) in a housing (100.1), wherein the actuation element (110) has at least one piston (110.1, 110.2) or the actuation element (110) is connected to at least one piston (110.1, 110.2), wherein at least one actuator ((80), tensioning cylinder (40)) and a pressure accumulator (150) are provided, wherein the actuator unit (100) is in fluid-conveying connection with the actuator (80) such that in one pump stroke of the actuator unit (100), a transfer means is pumped into a second chamber (40.1, 80.2) of the actuator ((80), tensioning cylinder (40)) and the quantity of transfer medium displaced from a further first chamber (40.2, 80.1) of the actuator ((80), tensioning cylinder (40)) during the pump stroke is temporarily stored in a pressure accumulator (150). Such a high-pressure pump can be used, in the case of an overload, to effectively act on the support system of the crushing jaws (21, 22) to let the uncrushable or hard to crush object escape from the crushing jaws by allowing the crushing jaws to move away from one another.

A crushing device and a method for crushing materials therewith. The crushing device includes a jaw crusher having two jaws, wherein at least one jaw moves reciprocally toward the other jaw and away from the other jaw when in use, a supply device for supplying material to be crushed to the jaw crusher, and a discharge device for discharging crushed material. The crushing device includes a housing that encloses the jaw crusher, a ventilation device provided with air outlet openings that open into the crushing space, by means of which ventilation device air can be blown under pressure between the jaws of the jaw crusher device, and an exhaust device, which exhausts air mixed with fine material produced by the jaw crusher from the housing. The exhaust device is configured to convey the fine material mixed with the air to a collecting location.

A crushing device and a method for crushing materials therewith. The crushing device includes a jaw crusher having two jaws, wherein at least one jaw moves reciprocally toward the other jaw and away from the other jaw when in use, a supply device for supplying material to be crushed to the jaw crusher, and a discharge device for discharging crushed material. The crushing device includes a housing that encloses the jaw crusher, a ventilation device provided with air outlet openings that open into the crushing space, by means of which ventilation device air can be blown under pressure between the jaws of the jaw crusher device, and an exhaust device, which exhausts air mixed with fine material produced by the jaw crusher from the housing. The exhaust device is configured to convey the fine material mixed with the air to a collecting location.

A jaw crusher, a mineral material processing plant and a method for processing mineral material. The jaw crusher includes a fixed jaw and a movable jaw for forming a crushing chamber therebetween which is open at the top. The fixed jaw includes a first wear part mounted thereto and the movable jaw includes a pitman and a second wear part mounted thereto. The pitman is rotatably mounted to a first eccentric shaft. The pitman is further rotatably mounted to second eccentric shaft configured to guide the stroke of the movable jaw to create a movement pattern with a substantially linear crushing stroke, wherein the eccentricity of the second eccentric shaft is larger than that of the first eccentric shaft.

A jaw crusher, a mineral material processing plant and a method for processing mineral material. The jaw crusher includes a fixed jaw and a movable jaw for forming a crushing chamber therebetween which is open at the top. The fixed jaw includes a first wear part mounted thereto and the movable jaw includes a pitman and a second wear part mounted thereto. The pitman is rotatably mounted to a first eccentric shaft. The pitman is further rotatably mounted to second eccentric shaft configured to guide the stroke of the movable jaw to create a movement pattern with a substantially linear crushing stroke, wherein the eccentricity of the second eccentric shaft is larger than that of the first eccentric shaft.

A method for compressing or decompressing a spring loading a tie rod in a jaw crusher. The tie rod is supported by, at one location, a pendulum of the jaw crusher and, at another location, the jaw crusher's frame through the said spring. The spring is installed between the jaw crusher's frame and a second spring support supported by the tie rod; and the second spring support is moved in relation to the tie rod. A support part of the tightening device and at least two moving screws supported by the support part are arranged to influence the second spring support. The support part is supported by the tie rod through a locking member; and the at least two moving screws supported by the support part are moved to change the distance between the second spring support and the support part.

A method for compressing or decompressing a spring loading a tie rod in a jaw crusher. The tie rod is supported by, at one location, a pendulum of the jaw crusher and, at another location, the jaw crusher's frame through the said spring. The spring is installed between the jaw crusher's frame and a second spring support supported by the tie rod; and the second spring support is moved in relation to the tie rod. A support part of the tightening device and at least two moving screws supported by the support part are arranged to influence the second spring support. The support part is supported by the tie rod through a locking member; and the at least two moving screws supported by the support part are moved to change the distance between the second spring support and the support part.

A blade plate for a crusher, where in the blade plate is normally installed on a fixed side or a movable side, includes a base material part, and a large number of blade parts arranged on a surface of the base material part. The blade parts include a rhombic blade part that forms a rhombic blade at a corner between inclined portions and a mountain-shaped blade part that is formed in a polyhedron shape in which a cross-shaped tip blade is formed at a corner between chipped portions provided at inclined portions. An inclined blade is formed at a corner between the inclined portions and is coupled to the rhombic blade part at an intersection point of diagonals of the rhombic blade part and a crusher using the blade plate.