EP4344784A1 - Partie de rotor d'un broyeur à impact - Google Patents

Partie de rotor d'un broyeur à impact Download PDF

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Publication number
EP4344784A1
EP4344784A1 EP23193509.9A EP23193509A EP4344784A1 EP 4344784 A1 EP4344784 A1 EP 4344784A1 EP 23193509 A EP23193509 A EP 23193509A EP 4344784 A1 EP4344784 A1 EP 4344784A1
Authority
EP
European Patent Office
Prior art keywords
knife
rotor
plate
recess
spacer disk
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
EP23193509.9A
Other languages
German (de)
English (en)
Inventor
Mario ZÖLLIG
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.)
Swissrtec AG
Original Assignee
Swissrtec AG
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 Swissrtec AG filed Critical Swissrtec AG
Publication of EP4344784A1 publication Critical patent/EP4344784A1/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
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
    • B02C13/1807—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate
    • B02C13/1814—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate by means of beater or impeller elements fixed on top of a disc type 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
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/28—Shape or construction of beater elements
    • B02C13/2804—Shape or construction of beater elements the beater elements being 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
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices 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
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/28—Shape or construction of beater elements
    • 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
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
    • B02C13/1807—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate
    • B02C2013/1878—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate radially adjustable
    • 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
    • B02C13/26—Details
    • B02C13/28—Shape or construction of beater elements
    • B02C2013/2808—Shape or construction of beater elements the beater elements are attached to disks mounted on a shaft
    • 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
    • B02C13/26—Details
    • B02C2013/29—Details devices for manipulating beater elements

Definitions

  • the present invention describes a rotor part of an impact mill, which has a plurality of rotor tool knives that can be releasably attached to a knife fastening plate, each rotor tool knife being releasably fastened with a knife holder at an assigned knife position and the entire rotor part in an impact mill housing by means of a rotor part fastening sleeve attached to a drive defined radial distance to a stator part with a plurality of stator tools is rotatably mounted about a longitudinal axis and a method for adjusting the distance between a rotor tool knife, releasably attached to a knife fastening plate of a rotor part of an impact mill relative to a stator part fixedly arranged on an inner surface of an impact mill housing or its stator tools.
  • Impact mills or rotor mills have been known for a long time and are becoming increasingly important in the course of treating used materials for recycling. Such impact mills are used to crush soft, medium-hard and fibrous, brittle materials. The applicant wanted to develop an impact mill that can also be used specifically for the aftertreatment and spherification of anode and cathode material from Li-ion battery recycling.
  • the input material is fed into the impact mill from above and moved within an impact mill housing between a stator part and a rotor part.
  • An insertable impact mill with an impact mill housing wherein a stator part which is locally fixed on the impact mill housing is arranged and at least one rotatable rotor part is moved with rotor tool knives at a defined distance relative to the stator part.
  • the rotor tool knives were releasably attached to a knife mounting plate, with the main aim being to simplify the replacement of individual rotor tool knives.
  • the individual rotor tool knives were held in a form-fitting manner by tool retaining brackets above and below the knife mounting plate. Accordingly, the rotor tool knives had to be manufactured to match the two tool holding brackets and were made from high-strength steel with as little wear as possible.
  • the tool retaining bracket has been optimized to make it as easy as possible to attach the rotor tool blades to the blade mounting plate. Overall, replacing rotor tool knives is complex and, given the increased number of individual components, often leads to problems and must be carried out extremely carefully. The same also applies to a possibly desired offset of the rotor tool blades in the radial direction outwards.
  • Impact mills and rotor parts with reusable and replaceable rotor tool knives are known, but the ease of replacing the rotor tool knives and adjusting the distance relative to the stator part 3 is disadvantageous and time-consuming.
  • the user-friendliness is not good and the impact crusher is anything but maintenance-friendly.
  • the present invention has set itself the task of further developing an impact mill or a rotor part of an impact mill, so that increased ease of use is achieved.
  • the exchange of rotor tool knives but also the simple and quick adjustment of the distance between the rotor tool knives relative to the stator tools of the stator part leads to enormously increased user-friendliness.
  • quick adjustment is achieved here and unwanted incorrect adjustment is avoided in practice.
  • An impact mill 0 which has an impact mill housing 1 with a substantially cylindrical impact mill housing wall 10 and a corresponding inner surface 11.
  • a stator part 3 of the impact mill 0 is arranged along the inner surface 11, which stator part comprises a plurality of stator tools 30 which can have different dimensions and, in known embodiments, are arranged directly or indirectly attached to the inner surface 11 from the outside or inside.
  • a drive unit with at least one motor and electronics for controlling and monitoring the impact mill are not shown here and are not explained in more detail since these components are known to those skilled in the art.
  • the shape of a drive shaft, the bearing of the drive shaft, the number of rotor parts and the detailed design of the stator part 3 are no longer of interest and can be designed in various designs.
  • the rotor part 2 which is mounted in the impact mill housing 1 so as to be rotatable about a longitudinal axis L.
  • the rotor part 2 has a blade fastening plate 21, a rotor part fastening sleeve 22 and a plurality of rotor tool blades 23 fastened thereto.
  • the blade fastening plate 21 is also called a star plate, since the shape of a multi-armed star is created by the radially outward-projecting rotor tool blades 23.
  • the rotor part 2 shown has a simplified exchangeability of the rotor tool blades 23.
  • a spacer disk 24 is arranged on each rotor tool blade 23, which is operatively connected to a blade holder.
  • the knife holder is designed, for example, as a knife holder plate 25. This ensures that the rotor tool knife 23, in which the spacer 24 is inserted, cannot move upwards.
  • Each rotor tool knife 23 is held releasably secured against rotation with a knife holder plate 25 for each rotor tool knife 23 on the knife fastening plate 21.
  • the tilting or rotation of the rotor tool knife 23 is ensured by the gap or slot as a knife holding recess 210 in the front part of the knife mounting plate 21.
  • the rotor tool knife 23 is, for example, 15mm thick, the knife holding recess 210 is 15.5mm wide. If the knife holder plate 25 is selected as a knife holder, it can be secured by knife holder fasteners 26 used.
  • the knife fastening plate 21 is freely movable and is moved outwards at the latest when fastening is forgotten when the rotor part 2 is turned up and thus rotated.
  • the knife holder plate 25 it would also be possible to screw the rotor tool knife 23 directly to the knife fastening plate 21 with a screw whose screw head protrudes at least partially over the spacer disk 24. Then the knife holder would be at least one screw, the head of which Spacer 24 is secured towards the top directly by the screw head, which protrudes at least partially over the spacer 24. This means that the knife holder plate 25 could be dispensed with, but appropriate screws and threaded holes or lock nuts would have to be provided. However, the technical effect would be the same, although the detachability of the rotor tool knife 23 including the spacer disk 24 would be more complex.
  • Sleeve fastening means 27 usually in the form of screws, nuts and washers, are used to fasten the knife fastening plate 21 to the rotor part fastening sleeve 22. Since enormous centrifugal forces and high radial accelerations act during operation, the fixation of the rotor tool knives 23 and of course the knife fastening plate 21 must be ensured.
  • an elongated knife holding recess 210 and a round plate spacer recess 212 are provided at the location of each rotor tool knife 23, i.e. each knife position.
  • the spacer 24 which is also round, can be carried out parallel to the longitudinal axis L.
  • the plate spacer recess 212 is provided with a positioning projection 2121 and/or with a recess stop bead 2122.
  • the elongated knife holding recess 210 serves to accommodate the part of the rotor tool knife 23.
  • each rotor tool knife 23 is provided with a spacer recess 230 on its side oriented towards the longitudinal axis L. The spacer 24 can be inserted laterally into the spacer recess 230 and then pushed into the elongated knife holding recess 210 with the rotor tool knife 23, which is done here from above the knife fastening plate 21.
  • a recess stop bead 2122 is arranged on the plate spacer recess 212 along a lower edge, opposite the insertion side of the rotor tool knife 23. This recess stop bead 2122 projects towards the center of the plate spacer recess 212, so that the spacer 24 cannot slip downwards through the knife fastening plate 21 or the plate spacer recess 212.
  • a bead holder 2123 can also be arranged at the upper edge of the plate spacer recess 212, which is advantageous depending on the design of the spacer 24.
  • the recess stop bead 2122 and the bead holder 2123 are designed here as an option or additional feature so that the spacer disk 24 does not fall through downwards.
  • a stop bead 242 running around the edge of the spacer disk 24 has prevailed, as in Figure 4 visible.
  • the circumferential stop bead 242 At the upper edge of the spacer disk 24 is the circumferential stop bead 242, so that when the spacer disk 24 is fastened, it rests in the spacer disk recess 230 on the blade fastening plate 21.
  • the knife holder is designed as a knife holder plate 25, which here has a knife holder recess 251, whereby a fork-like shape is achieved.
  • the width of the knife holder recess 251 is slightly larger than the width of the side of the rotor tool knife 23 to be inserted, so that the knife holder plate 25 can be moved parallel to the knife fastening plate 21 radially in the direction of the rotor tool knife 23, with the rotor tool knife 23 inserted into the knife holder recess 210 or with the knife holder recess 210 free.
  • This process step is marked with I in Figure 4 marked. Before moving, the knife holder fastening means 26 can be loosened.
  • the knife mounting plate 21 is loose, the knife mounting plate 21 is moved outwards by centrifugal force.
  • a sliding slot 250 is cut out in the knife mounting plate 25 opposite the knife receiving recess 251, so that the knife holder fastening means 26 do not have to be completely loosened before the knife mounting plate 25 can be moved linearly.
  • the rotor tool knife 23 with the spacer disk 24 inserted in the spacer disk recess 230 can be pulled out upwards parallel to the longitudinal axis L in a step II. This allows rotor tool blades 23 to be exchanged and replaced quickly and easily, with only steps I and II being necessary.
  • the rotor tool blade 23 should not be completely replaced in order to conserve resources.
  • the rotor tools 23 should be used multiple times and only changed when they are completely worn out.
  • Optimized use of the rotor tool blade 23 and thus reduction of wear costs is extremely important today.
  • Adjusting the gap between the rotor part 2 and the stator tools 30 is essential for the actual process.
  • the gap has a strong influence on the quality of the disintegration, the balling and the comminution. The narrower the gap, the better the quality and the finer the product, but in return the wear increases, the energy requirement, the process heat increases and the throughput decreases. To solve this problem, fastening using a spacer disk 24 can also be useful.
  • the spacer 24 has several recesses 240 cut out along its circumference parallel to the longitudinal axis of the spacer 24. These recesses 240 have different depths, with depth being the distance between the circumference and the end of the recess 240 towards the center of the recess 240 is understood. Specifically, in Figures 4 and 5 Spacer disks 24 are shown, each with four recesses 240 that completely cross in the longitudinal direction, i.e. parallel to a longitudinal axis. At least one recess 240 can be inserted into at least one positioning projection 2121 on the plate spacer recess 212 in an operatively connectable manner. It would also be possible to design the spacer 24 with more or fewer than four recesses 240 in the spacer 24, each with different depths of the recesses 240.
  • the detachable fastening of the rotor tool knife 23 in the knife fastening plate 21 is possible in four different orientations of the spacer disk 24.
  • the spacer disk 24 is mounted in the plate spacer disk recess 212 when the rotor tool knife 23 is installed, while the rotor tool knife 23 is mounted in the knife holding recess 210.
  • the distance between the tip of the rotor tool knife 23 and the stator tool 30 is set depending on the orientation of the spacer disk 24 or with its recess 240 facing the center of the knife fastening plate 21 in the radial direction.
  • the rotor tool blade 23 can be fixed by means of the spacer disk 24 in the spacer disk recess 230 in the plate spacer disk recess 212 of the Knife mounting plate 21 and even the distance between the tip of the rotor tool knife 23 and the stator tool 30 can be varied.
  • a marking 241 assigned to the various recesses 240 can be printed, lasered or embossed. Four different markings 0, 2.5, 5 and 7.5 are printed here. The higher the value, the larger the flight circle of the rotor tool knife 23 and the smaller the distance to the stator tool 30.
  • the markings 241 can be identified with different colors.
  • the distance of the rotor tool blade 23 relative to the stator part 3 can be varied as follows.
  • the knife holder plate 25 is loosened if the knife holder plate 25 was attached, otherwise you can skip this step, and pushed linearly towards the center of the knife holder plate 21, away from the knife holder recess 210 and the spacer recess 230, according to method step I.
  • the rotor tool knife 23 is pulled out together with the spacer 24 inserted into the spacer recess 230 upwards parallel to the longitudinal axis L in step II, as can be clearly seen in Figure II.
  • the knife holder fastener 26 is released. With the top here is the page the knife mounting plate 21 is meant, on which the knife holder plate 25 is arranged.
  • the spacer disk 24 is rotated about its longitudinal axis until a different recess 240 than before faces the tip of the rotor tool knife 23 in the spacer disk recess 230 lies. This is indicated by the dashed double arrow in Figure 4 indicated. Thereafter, the rotor tool knife 23 with spacer 24 is reinserted into the knife holding recess 210 and plate spacer recess 212, as in Figure 5 shown.
  • the knife holder plate 25 is then pushed back to the outer edge of the knife fastening plate 21, the knife fastening plate 21 being partially pushed over the spacer disk 24, so that the rotor tool knife 23 is indirectly secured against slipping upwards by the spacer disk 24.
  • the impact mill housing 1 can be loaded and closed and the impact mill 0 can start operating again.
  • the process of adjusting the distance can be carried out several times with a rotor tool knife 23 before a change is due. This distance adjustment is comparatively quick and easy.
  • the rotor tool knife 23 is indirectly held in a releasable, positive-locking manner in the knife holding recess 210 and the plate spacer recess 212 by means of the spacer disk (24) and the knife holder fastening means 26.
  • three such rotor parts 2 form the rotor in three levels.
  • the levels can be mounted in line or offset, which influences the length of time the material goes from top to bottom.
  • the rotor height which is created with three levels of rotor parts 2, to be ideal.
  • we can adjust the rotor tools to suit the breaking down/crushing process i.e. make the gap between rotor part 2 and stator part 3 smaller from top to bottom.
  • Different levels with mounted rotor tool blades 23 are generally set to different gap dimensions, the rotor tool blades 23 in the top level are set to the largest gap, the size and type of input material determine the setting. The further down the material goes in the impact mill 0, the more it is balled up/crushed.
  • the gap dimensions in the lower levels are therefore set increasingly narrower.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
EP23193509.9A 2022-09-29 2023-08-25 Partie de rotor d'un broyeur à impact Pending EP4344784A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH001122/2022A CH720074A1 (de) 2022-09-29 2022-09-29 Rotorteil einer Prallmühle.

Publications (1)

Publication Number Publication Date
EP4344784A1 true EP4344784A1 (fr) 2024-04-03

Family

ID=85556668

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23193509.9A Pending EP4344784A1 (fr) 2022-09-29 2023-08-25 Partie de rotor d'un broyeur à impact

Country Status (3)

Country Link
US (1) US20240109073A1 (fr)
EP (1) EP4344784A1 (fr)
CH (1) CH720074A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4142687A (en) * 1977-12-14 1979-03-06 The Heil Co. Adjustable arm for shredder hammer
EP1960108A1 (fr) 2005-12-08 2008-08-27 Swissrtec GMBH Rotor pour broyeur a percussion
US20090250539A1 (en) * 2008-04-04 2009-10-08 Riverside Products, Inc. Hammermill hammer with pin-hole insert

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4142687A (en) * 1977-12-14 1979-03-06 The Heil Co. Adjustable arm for shredder hammer
EP1960108A1 (fr) 2005-12-08 2008-08-27 Swissrtec GMBH Rotor pour broyeur a percussion
EP1960108B1 (fr) * 2005-12-08 2018-01-10 swissRTec AG Rotor pour broyeur a percussion
US20090250539A1 (en) * 2008-04-04 2009-10-08 Riverside Products, Inc. Hammermill hammer with pin-hole insert

Also Published As

Publication number Publication date
CH720074A1 (de) 2024-04-15
US20240109073A1 (en) 2024-04-04

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