EP3984644A1 - Concasseur à percussion - Google Patents

Concasseur à percussion Download PDF

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Publication number
EP3984644A1
EP3984644A1 EP21194266.9A EP21194266A EP3984644A1 EP 3984644 A1 EP3984644 A1 EP 3984644A1 EP 21194266 A EP21194266 A EP 21194266A EP 3984644 A1 EP3984644 A1 EP 3984644A1
Authority
EP
European Patent Office
Prior art keywords
impact
section
rotor
rocker
crushing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21194266.9A
Other languages
German (de)
English (en)
Inventor
Jochen Meier
Christian Schlecht
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kleemann GmbH
Original Assignee
Kleemann GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kleemann GmbH filed Critical Kleemann GmbH
Publication of EP3984644A1 publication Critical patent/EP3984644A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00—Control arrangements specially adapted for crushing or disintegrating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/02—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft
    • B02C13/06—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor
    • B02C13/09—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor and throwing the material against an anvil or impact plate
    • B02C13/095—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor and throwing the material against an anvil or impact plate with an adjustable anvil or impact plate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/0012—Devices for disintegrating materials by collision of these materials against a breaking surface or breaking body and/or by friction between the material particles (also for grain)
    • B02C19/0018—Devices for disintegrating materials by collision of these materials against a breaking surface or breaking body and/or by friction between the material particles (also for grain) using a rotor accelerating the materials centrifugally against a circumferential breaking surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/02—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft
    • B02C13/06—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/02—Feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00—Disintegrating plant with or without drying of the material
    • B02C21/02—Transportable disintegrating plant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C2210/00—Codes relating to different types of disintegrating devices
    • B02C2210/01—Indication of wear on beaters, knives, rollers, anvils, linings and the like

Definitions

  • the invention relates to an impact crusher, in particular a rotary impact crusher with a crushing unit which has an impact rotor, the impact rotor carrying at least two impact bars, the impact bars having a radially outer end, with at least one of the impact bars forming an impact circle from the radially outer end.
  • At least one impact rocker is assigned to the impact rotor, such that in an operating position between the impact circuit and a crushing section of the impact rocker, a crushing gap is formed, wherein to set the crushing gap, the crushing section of the impact rocker is first adjusted by an adjustment unit in an infeed direction by a first adjustment dimension is that it touches a contact point of the impact bar, in particular the radially outer end and/or the impact circle, with the first setting dimension being compared with a first reference value in a measuring device, and with the breaking section to create the Br echspalts is adjusted by a predetermined gap size.
  • a rotary impact crusher which has a rotor rotatable about an axis in a housing.
  • the rotor carries rasp bars, which am Outer circumference of the rotor are provided with a free end. These radially outer ends of the impact bar form an impact circle.
  • An impact rocker of a crusher is arranged opposite the rotor. A crushing gap is formed between a crushing section of the impact rocker and the impact circle. The impact rocker can be adjusted by means of an adjustment unit in such a way that the width of the crushing gap can be varied.
  • the impact rocker In order to set a predetermined width of the crushing gap to a predetermined dimension, the impact rocker is first advanced by means of the setting unit in the direction of the impact circle while the rotor is running. As soon as the impact rocker makes contact with the impact circle and thus the outer ends of the impact bar, a mechanical noise is produced. This can be recorded with a microphone. In this way, the so-called zero position of the impact rocker is determined. Starting from this zero position, the impact rocker is then pulled back by means of the actuating unit. The travel path is monitored. This allows the desired crushing gap to be set.
  • US 10,279,354 B2 discloses a rotary impact crusher with a rotor, which again has protruding free ends of blow bars on its outer circumference. In this way, a batting circle is formed again.
  • Two impact rockers are assigned to the rotor. Similar to the D1, at least one of the impact rockers in this rotary impact crusher can be adjusted from its basic position to the zero position. The adjustment dimension until the zero position is reached can be determined with an odometer. This corrective measure is compared with a corrective measure that results when the rotary impact crusher is present with unworn impact bars and unworn impact rocker. In this way, the total wear can be determined, which is caused by wear on the blow bars and the impact rocker.
  • Another rotary impact crusher is off DE 26 55 655 C2 famous.
  • a measuring device is also described here, with which the total wear of the blow bar and the impact rocker can be determined.
  • This object is achieved in that, in an additional measuring step, the breaking section is brought into contact with a reference measuring section and a second corrective measure is thereby determined and this second corrective measure is compared with a second reference value.
  • the total wear in the system can first be determined by moving the impact rocker from a basic position to the zero position. In this zero position, the impact rocker contacts the free end of the impact bar or the impact circle. This can be done with the rotor running. A mechanical noise makes contact with the blow bar. This mechanical noise can either be detected by means of a signal pickup or it is acoustically detected by an operator.
  • the first corrective measure which arises when the impact rocker is moved out of its predefined basic position, can be recorded with an odometer and fed into a measuring unit comprising a computing unit. Alternatively, it is also conceivable that this measurement is carried out with the impact rotor stationary.
  • the impact rocker is then moved until it contacts the radially outer end of the blow bar.
  • the impact rocker is moved with its breaking section against a predetermined contact point of the impact bar.
  • This contact point is preferably arranged at a position on the blow bar that exhibits wear comparable to that of the radial end of the blow bar.
  • a free surface of the blow bar adjoining the radial end is suitable as a contact point for this purpose.
  • the first setting provides information about the total wear, which results from adding the wear of the free end of the blow bar and the breaking section.
  • the previously set width of the crushing gap which forms the first reference value, can be subtracted from the first corrective measure. The result reflects the total wear.
  • the second adjustment dimension can be determined.
  • a relative movement between the impact rocker and a reference measuring section of the impact rotor is carried out from a basic position.
  • This movement is preferably the result of an adjustment of the impact rocker from a basic position in the direction of the impact rotor until the breaking section contacts the reference measurement section of the impact rotor.
  • the reference measurement section is arranged at a point on the impact rotor that is not exposed to any or only little wear.
  • This reference measuring section is preferably arranged in the peripheral area of the impact rotor between two adjacent impact bars.
  • the second adjusting dimension provides information about the wear of the impact rocker.
  • this second corrective measure can be compared in the computing unit of the measuring unit with a second reference value, which results when the impact rocker is adjusted from the basic position in the non-worn state against the reference measuring section.
  • the wear of the impact rocker results from difference formation, in which the second reference value is subtracted from the second adjustment value.
  • the wear on the impact bar can then be determined in the computing unit by calculating the difference between the total wear and tear minus the wear on the impact rocker.
  • the reference measuring section is formed on the impact rotor. This results in a simple construction.
  • the reference measuring section can be arranged on the impact rotor in such a way that it is arranged in the range of motion predetermined by the pivot bearing of the impact rocker.
  • the impact rotor is rotated into a position in which the reference measuring section is opposite the crushing section of the impact rocker, that the rotary movement of the impact rotor is then stopped or slowed down, and that the crushing section is then moved until it the reference measurement section.
  • the breaking section is preferably adjusted in that the entire impact rocker is pivoted about its pivot bearing. Provision can preferably be made for the adjustment movement of the impact rocker to be brought about by an adjustment unit which is used to support the impact rocker when the crushing gap is set, and this adjustment unit serves to set the width of the crushing gap.
  • An inventive design of an impact crusher can be such that a sensor, in particular a dynamometer, is used, which determines the contact of the crushing section with the reference measuring section, and that with a switching unit, the actuating movement of the crushing section in the direction of the reference measuring section or the actuating movement of the reference measuring section toward the breaking section is stopped when the sensor outputs a contact signal.
  • the sensor is integrated into the actuating unit, which is used to support the impact rocker when the crushing gap is set.
  • the sensor can have a strain gauge or the sensor can detect when the actuating unit is no longer moving as a result of contact between the breaking section and the reference measuring section.
  • the sensor can then be designed as a displacement sensor
  • the travel path as the 2nd adjustment dimension of the impact rocker or part of the impact rocker is determined directly or indirectly by means of the measuring device, in particular the deflection of the impact rocker, and with the second reference value is compared.
  • the position of the impact rocker is evaluated when contact is made with the reference measuring section.
  • the angular position of the impact rocker can be evaluated here, which is caused by a rotation of the Impact rocker results in its pivot bearing. This angular deflection can be compared with a second reference value, which results from the twisting of an impact rocker in the non-worn state.
  • the impact rocker is moved from a predetermined reference position until the breaking section is in contact with the reference measuring section and that the extent of the adjustment is determined directly or indirectly as a second value by means of the measuring device and compared with the second reference value will. With this procedure, the resulting traversing path of the impact rocker is evaluated.
  • the reference positions of the impact rocker can be formed from any predetermined and previously defined position of the impact rocker.
  • a conceivable variant of the invention is such that an adjusting device is provided with which the impact rotor is rotated into a predetermined angular position and stopped there, with the breaking section being opposite the reference measuring section.
  • the adjusting device can be formed by the main drive of the impact crusher, which drives the impact rotor.
  • the impact rotor can be driven by means of an auxiliary drive in order to move it into the desired position.
  • the auxiliary drive can in particular be formed by a separate motor unit which acts on the impact rotor in addition to the main drive. More preferably, it can alternatively also be provided that the auxiliary drive is formed by a manually operable actuating device. For example, with such an adjustment device, the impact rotor can be manually rotated by the operator into the desired position.
  • a significantly simplified acquisition of measured values results when it is provided that one or more surface areas of the impact rotor are designed to be used as a reference measurement section and that the impact rotor is adjusted such that one of the reference measurement sections faces the crushing section.
  • the breaking section of the impact rocker can be quickly assigned to the closest reference measurement section in order to record the second control value.
  • the acquisition of measured values is particularly easy carry out this if it is provided that one or more of the reference measurement sections in a side view perpendicular to the axis of rotation of the impact rotor have the shape of a circle segment encircling the axis of rotation of the impact rotor.
  • the reference measurement sections then all have the same distance from the axis of rotation of the impact rotor. It is therefore not absolutely necessary to take into account the angular position of the impact rotor when the breaking section is in contact with the desired reference measurement section.
  • one or more of the reference measurement sections form a cross-sectional shape that changes in the circumferential direction of the impact rotor, in particular the shape of a spiral arc segment running around the axis of rotation of the impact rotor, in a side view perpendicular to the axis of rotation of the impact rotor, and that the radial distance of at least some of the surface areas of the reference measurement sections from the axis of rotation of the impact rotor is stored in a memory unit of the measurement device.
  • a wear prognosis can be carried out in a simple manner. In particular, it can then be determined whether the impact rocker and/or the blow bar has a sufficient remaining service life for an upcoming processing task.
  • the wear prognosis can be further refined if it is provided that the computing unit is supplied with a material parameter of the material to be shredded and that the computing unit determines the remaining service life of the blow bar and/or the impact rocker, taking the material parameter into account.
  • the material parameter can be determined, for example, by sampling and evaluation, for example by determining the hardness or abrasiveness of the material to be comminuted. Analogously, a material parameter, such as hardness or abrasiveness, can be determined from the determined wear.
  • FIG 1 shows a lateral, partially sectioned view of an impact crusher designed as a rotary impact crusher.
  • the impact crusher can be designed as a mobile system with a chassis 13 and a chain drive 15 . It has a feed unit 10, if necessary a preliminary screening, a crushing unit 20 and at least one crusher discharge belt 24.
  • a hopper 11 can be arranged in the area of the feed unit 10 .
  • the funnel 11 has funnel walls. It directs the supplied feed material onto a conveyor unit 12, which can preferably be designed as a vibrating feeder chute.
  • the conveyor unit 12 conveys the feed material to a screening unit 14, which can be formed, for example, by a double-deck preliminary screen.
  • the screen unit 14 has an upper double-deck heavy-piece screen 14.1, which is designed as a comparatively coarse screen and forms an upper deck.
  • a comparatively finer screen is arranged underneath, which forms a lower deck 14.2. It is set in circular vibration by a drive.
  • the upper deck separates a fine fraction and a medium grain from the material to be crushed.
  • the lower deck separates the fines from the medium grain.
  • the fine fraction can either be routed out of the material shredding plant by means of a side discharge belt 14.3 or returned to the medium grain by appropriately setting a bypass flap.
  • the medium grain is guided past the crushing unit 20 to the crusher discharge belt 24 via a bypass 23 .
  • the material to be crushed is fed to the crushing unit 20 via a crusher inlet 22 .
  • the crushing unit 20 has a crusher housing 21 in which an impact rotor 30 is rotatably housed.
  • the impact rotor 30 can be driven by a main drive 16 of the impact crusher.
  • the impact rotor 30 rotates about an axis of rotation 32.
  • the impact rotor 30 has a carrier 31 which has a plurality of receptacles 33 on its outer circumference.
  • a carrier 31 which has a plurality of receptacles 33 on its outer circumference.
  • three receptacles 33 are provided.
  • blow bars 35 can be used in an exchangeable manner and can be attached in the receptacles 33 in an exchangeable manner by means of a fastening section 35.4.
  • a bearing piece 34.1 to be used to fasten the blow bars 35 in the receptacle 33 in the direction of rotation V at the rear, preferably in an exchangeable manner.
  • the back of the blow bar 35 can be supported against this bearing piece 34.1.
  • two clamping wedges 34.2, 34.3 are provided for stable attachment of the blow bar 35.
  • the clamping wedges 34.2, 34.3 can be adjusted with clamping devices in order to press the impact bar 35 against the rear bearing piece 34.1.
  • the blow bars 35 each have a radial end 35.1.
  • the radially outer ends 35.1 of the impact bars 35 lie on a common impact circle K.
  • Open spaces 35.2 adjoin the radial ends 35.1 of the blow bars 35.
  • the open spaces 35.2 run at a distance from the striking circle K.
  • blow bars 35 Following the radial ends 35.1, the blow bars 35 have front faces 35.3 at the front. These front surfaces 35.3 protrude beyond a peripheral surface 36 of the rotor.
  • the peripheral surface 36 of the rotor forms reference measuring sections 36.1 between the receptacles 33 and consequently between the blow bars 35.
  • the reference measurement sections 36.1 are formed by arc segments which run spirally around the axis of rotation 32 of the impact rotor 30.
  • the distance between the rotor peripheral surface 36 and the axis of rotation 32 increases continuously, at least in sections. In the present exemplary embodiment, this distance increases continuously in the circumferential direction. However, it is also conceivable for the distance to increase in the opposite direction to the circumferential direction.
  • a reference measuring section 36.1 is preferably arranged in each intermediate area between the blow bars 35. However, it is also conceivable that only one reference measuring section 36.1 is provided on the rotor peripheral surface 36.
  • the crushing unit 20 has two impact rockers 41, 42. These impact rockers 41, 42 are assigned to the impact rotor 30.
  • the impact rocker 42 has a rocker body 42.1, which is pivotally connected to the chassis 13 via a pivot bearing 42.2.
  • the rocker body 42.1 has an impact surface 42.3 at the front, which is assigned to the impact rotor 30. At its end remote from the pivot bearing 42.2, the impact surface 42.3 terminates in a breaking section 42.6.
  • a control unit is used to pivot the impact rocker 42 about the pivot bearing 42.2 figure 2 is not shown.
  • the impact rocker 41 has a rocker body 41.1, which is pivotally connected to the chassis 13 via a pivot bearing 41.2.
  • the rocker body 41.1 has an impact surface 41.3 at the front, which is assigned to the impact rotor 30.
  • the impact surface 41.3 has a receptacle 41.4.
  • a wear insert 41.5 is fastened in this receptacle 41.4, preferably in an exchangeable manner.
  • the wear insert 41.5 consists of a material which is harder than the impact surface 41.3.
  • the wear insert 41.5 preferably consists of a hard material.
  • the wear insert 41.5 has a breaking section 41.6 at its end remote from the pivot bearing 41.2.
  • a control unit 50 is used to pivot the impact rocker 41 about the pivot bearing 41.2.
  • the actuating unit 50 can be formed by a hydraulic cylinder.
  • the hydraulic cylinder has a cylinder 51 in which a piston is adjustably guided.
  • a piston rod 52 is coupled to the cylinder 51 . That The end of the piston rod 52 carries a coupling piece 53.
  • the coupling piece 53 is pivotably coupled to the rocker body 41.1.
  • a resistance is formed by means of the setting unit 50, against which the impact rocker 41 is arranged in the crushing chamber so that it can swing freely to a limited extent.
  • the setting unit 50 is also used to set the distance between the breaking section 41.6 and the impact circle K.
  • the piston is moved in the hydraulic cylinder, with the piston rod 52 increasingly moving into the cylinder 51 or out of it, depending on the direction of movement of the piston.
  • the material to be crushed is fed to the impact rotor 30 during operation.
  • the impact rotor 30 rotates at high speed about the axis of rotation 32.
  • the impact bars 35 come into engagement with the material to be comminuted with their front surfaces 35.3 and accelerate it.
  • the material to be crushed is thrown against the impact surfaces 42.3 and 41.3 of the impact rockers 42 and 41.
  • the material to be shredded is broken up. If it has a grain size that allows the material to pass between the crushing section 42.6 and the impact circle K, the crushed material is further crushed on the impact rocker 41. When a grain size is reached that allows the crushed material to fall through the crushing gap formed between the crushing section 41.6 and the impact circle K, the crushed material reaches the crusher discharge belt 24.
  • both the impact rocker 41 and the blow bars 35 are subject to high wear. This increases the crushing gap. If the crushing gap is too wide, it must be reset.
  • the setting unit 50 is used for this.
  • the wear of the blow bars 35 and, separately from this, the wear of the impact rocker 41 can be determined.
  • the material feed is stopped when a measuring process is carried out.
  • the impact rotor 30 continues to be operated until there is no more crushed material in the crushing unit 20 .
  • the impact rotor 30 now runs freely without affecting the material to be crushed.
  • the impact rotor 30 is stopped.
  • the impact rotor 30 is then rotated until the breaking section 41.6 of the impact rocker 41 is opposite a reference measuring section 36.1 of the impact rotor 30.
  • the rotation of the impact rotor 30 can take place, for example, with a manually driven auxiliary drive or an electric motor-driven auxiliary drive.
  • the impact rocker 41 is moved by means of the actuating unit 50, starting from a defined basic position, in the direction of the reference measuring section 36.1 until the breaking section 41.6 rests against the reference measuring section 36.1 (see figure 2 ).
  • the contact with the reference measuring section 36.1 can be determined by means of a force measuring system, for example in the hydraulic cylinder or with another suitable sensor.
  • the deflection of the impact rocker 41 from the basic position is measured as the 2nd control dimension. For example, this can be determined by measuring the angle at the pivot bearing 41.2 of the impact rocker 41 or using the movement of the hydraulic cylinder (for example the piston rod 52 or the piston).
  • the reference measurement sections 36.1 are arranged between the blow bars 35 in an area that is subject to little or no wear.
  • the distance between the rotor's circumferential surface 36 and the axis of rotation 32 in the area of the reference measuring sections 36.1 can be stored as a functional relationship depending on the angular position of the impact rotor 30 in a memory unit of the measuring device of the impact crusher. It is also conceivable that pairs of values are stored in the memory unit of the measuring device, with specific angular positions of the impact rotor 30 being assigned to distances between the circumferential surface 36 of the rotor and the axis of rotation 32 .
  • the 2nd corrective measure is compared with a 2nd reference value in a computing unit of the measuring device.
  • the corresponding deflection of an unworn impact rocker 41 upon contact with the same area of the reference measuring section 36.1 on which the breaking section 41.6 rests serves as the 2nd reference value.
  • a functional relationship or pairs of values for the second reference value can be stored in the memory unit of the measuring device.
  • the wear of the impact rocker 41 in the region of the breaking section 41.6 can be determined by forming the difference, with the 2nd reference value being subtracted from the 2nd adjustment dimension.
  • the rotor peripheral surface 36 as a reference measurement section 36.1 forms an arc of a circle or approximately an arc of a circle that runs around the axis of rotation 32 with a radius. In this case, for example, the radius of the circular arc can be used as the 2nd reference value.
  • the impact rocker 41 is then returned to a basic position with the setting unit 50 .
  • the impact rotor 30 can then be rotated, for example by means of the main drive 16 or by means of an auxiliary drive.
  • the impact rocker 41 When the impact rotor 30 is rotating, the impact rocker 41 is adjusted from a predefined basic position by means of the adjustment unit 50 until the breaking section 41.6 touches the impact circle K. When the impact rotor 30 is rotating, the impact rocker 41 then comes into contact with the radial end 35.1 of the impact bar 35, which can be detected acoustically, for example with a microphone or by an operator.
  • the contact of the impact rocker 41 with the radial end 35.1 of the impact bar 35 can be determined acoustically using a microphone. Additionally or alternatively, this contact can also be a suitable signal pick-up, for example a contact sensor, in particular with an acceleration sensor.
  • the deflection of the impact rocker 41 from the basic position until it comes into contact with the impact circle K is determined as the 1st adjustment dimension.
  • This 1st adjusting dimension can be determined, for example, by measuring the angle at the pivot bearing 41.2 of the impact rocker 41 or as a deflection of the hydraulic cylinder (for example the travel of the piston rod 52 or the piston of the hydraulic cylinder). In other words, the "zero position" of the impact rocker 41 is set and determined.
  • the 1st adjustment dimension can also be determined when the impact rotor 30 is stationary.
  • the breaking section 41.6 is moved against the radial end 35.1 of the impact bar 35, such as figure 3 indicates.
  • the measured deflection from the predefined basic position of the impact rocker 41 is then used as the 1st corrective measure.
  • the assignment of the impact rotor 30 to the breaking section 41.6 can again be achieved by a manual or motorized auxiliary drive.
  • the 1st adjustment dimension is compared with a 1st reference value.
  • the corresponding deflection of an unworn impact rocker 41 and an unworn impact bar 35 upon contact of the breaking section 41.6 with the impact circuit K or a contact point of the impact bar 35 serves as the 1st reference value.
  • the total wear which results from the wear of the crushing section 41.6 and the wear of the blow bar 35, can be determined by forming the difference, with the 1st reference value being subtracted from the 1st adjustment dimension.
  • the wear of the blow bar 35 can be determined by calculating the difference.
  • the 2nd dimension was determined first and then the 1st dimension.
  • the 1st dimension and then the 2nd dimension can also be determined in reverse order.
  • the impact rocker 41 can be pivoted again by means of the setting unit 50 until the desired width of the crushing gap is set. For example, the impact rocker 41 can be moved back from the crushing gap position "zero" to the desired spacing in the crushing gap, as is usual in the prior art.
  • a wear prognosis can be made. For example, it can be determined whether the condition of the impact rocker 41 and/or the blow bars 35 is sufficient for a planned material processing.
  • FIG. 1 further shows, the comminuted material coming from the impact rotor 30 reaches the crusher discharge belt 24 together with the material guided in the bypass 23 .
  • a magnetic separator 17 can be arranged above the crusher discharge belt 24 . This magnetic separator 24 separates any iron parts present in the broken material. He draws accordingly these iron parts and conveys them sideways out of the transport area of the crusher discharge belt 24.
  • a further screen unit 24.1 with a screen deck can be provided at the end of the crusher discharge belt 24, for example.
  • the screen deck 24.1 screens out a fine material fraction 24.2. This falls onto a further conveyor belt 25.
  • the fine material fraction 24.2 is conveyed onto a crushed material heap 14.4.
  • the material not screened out by the screening unit 24.1 reaches a return belt 26.
  • This rock fraction is returned by means of the return belt 26 and passed through the crushing unit 20 again.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
EP21194266.9A 2020-09-25 2021-09-01 Concasseur à percussion Pending EP3984644A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020125132.7A DE102020125132A1 (de) 2020-09-25 2020-09-25 Prallbrecher

Publications (1)

Publication Number Publication Date
EP3984644A1 true EP3984644A1 (fr) 2022-04-20

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EP21194266.9A Pending EP3984644A1 (fr) 2020-09-25 2021-09-01 Concasseur à percussion

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US (1) US11925939B2 (fr)
EP (1) EP3984644A1 (fr)
CN (1) CN114247536A (fr)
DE (1) DE102020125132A1 (fr)

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CN114247536A (zh) 2022-03-29
US20220097076A1 (en) 2022-03-31
US11925939B2 (en) 2024-03-12

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