EP0787529A1 - Rotor für Prallbrecher - Google Patents

Rotor für Prallbrecher Download PDF

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Publication number
EP0787529A1
EP0787529A1 EP97200174A EP97200174A EP0787529A1 EP 0787529 A1 EP0787529 A1 EP 0787529A1 EP 97200174 A EP97200174 A EP 97200174A EP 97200174 A EP97200174 A EP 97200174A EP 0787529 A1 EP0787529 A1 EP 0787529A1
Authority
EP
European Patent Office
Prior art keywords
beater
bar
beaters
rotor
rotor according
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.)
Withdrawn
Application number
EP97200174A
Other languages
English (en)
French (fr)
Inventor
Guy Germay
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.)
Magotteaux International SA
Original Assignee
Magotteaux International SA
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 Magotteaux International SA filed Critical Magotteaux International SA
Publication of EP0787529A1 publication Critical patent/EP0787529A1/de
Withdrawn legal-status Critical Current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
    • B02C13/26—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

Definitions

  • the present invention relates to a rotor for an impact crusher comprising a series of discs fixed on an axis of rotation, a series of symmetrical longitudinal beaters, radially projecting from the discs and arranged in open and aligned peripheral housings of the discs and a system. of fixing to hold the beaters, in a removable way, in their housing.
  • This kind of crusher is commonly used, for example, for crushing rocks, recycling debris, etc.
  • the material to be crushed is poured onto the rotor which is driven around its axis of rotation and the crushing of the material is produced either under the impact of the beaters, or when the material shatters against screens onto which it is projected by the rotor. Due to the intensity of the impact on the beaters, they are exposed to rapid wear and must be replaced relatively often. To halve the frequency of replacement of the beaters, it is known to use symmetrical beaters which can be turned over when their leading face is worn.
  • the document AT-B-351906 proposes a rotor with symmetrical beaters which can be turned over when one of their attack faces is worn.
  • the beaters have, on their front and rear flanks, two symmetrical grooves with rounded section and are held in place on the rear flank by a round rod and, on the front flank, by wedges fixed by wedge effect on pointed noses forming the outer edge of the housing.
  • These beaters are not rigidly fixed and can oscillate around their rod and holding wedge to lock in a determined position under the effect of centrifugal force. Since there is no rigid attachment, the beaters must be made of a relatively ductile material, such as steel or manganese, this however at the expense of wear resistance.
  • the wedges can only be released tangentially from the nose on which they are stuck.
  • the beaters must therefore be released axially from the rotor with a view to their overturning or replacement, which often constitutes a handicap.
  • the object of the present invention is to provide a new crusher rotor with an improved fastening system for the beaters which facilitates the replacement and reversal of the beaters and which ensures a rigid and intimate tightening of the beaters in their housing thus allowing the use of very hard alloys for the realization of the beaters.
  • the rotor proposed by the present invention is characterized in that the fixing system comprises two distribution bars arranged in said housings on either side of each beater and extending over the entire length of the beater, in that one of the bars is associated with an axial and radial positioning system of the beater and in that the opposite bar has a longitudinal groove into which are introduced, by sliding, a series of fixing blocks with progressive tightening by means clamping wedges which are movable in a direction having a radial component and a tangential component with respect to a diametrical plane of the rotor.
  • This system for fixing the beaters allows a rigid connection between the beaters and the rotor and, therefore, the use of very hard alloy for the manufacture of the beaters.
  • the beater is perfectly held and tightened over its entire length.
  • each distribution bar is preferably covered with a removable wear bar which provides a perfectly flat bearing surface over the entire length of the beater and thus ensures good reception and transmission of shocks. In the event of wear, these bars can be replaced without the need to replace the distribution bars.
  • the axial and radial positioning system can consist of two cylindrical studs screwed to the two opposite ends of the distribution bar and extending longitudinally in corresponding opposite housings of the bar and the beater.
  • Each fixing block has, on the outside, a shoe of complementary section to the groove of the bar in which it is engaged and, on the inside, an inclined slide in which is slidably nested an inclined face of the wedge clamping whose opposite face is flat and whose base is slidably engaged in a shoe which is connected by means of clamping screws to the fixing block.
  • the slide of the fixing block preferably has a dovetail section and the clamping corner of the bevelled side edges of complementary shape.
  • Each beater has, in the middle region, two opposite flat faces which are preferably provided with tongues or machined studs serving as support, on one side, to the flat faces of the clamping corners and, on the other side , to the distribution bar.
  • tongues or machined studs serving as support, on one side, to the flat faces of the clamping corners and, on the other side , to the distribution bar.
  • the rotor shown in Figure 1 consists essentially of a series of discs 10 which are fixed on a central axis not shown, actuated by a suitable motor to rotate the set of discs.
  • Each of the discs 10 has, at its periphery, a series of recesses or housings 12 aligned longitudinally one on the other.
  • a beater 14 In each row of housing 12 is disposed a beater 14 as shown in Figure 2 which is intended to strike the material to be crushed during the rotation of the rotor.
  • each beater 14 has a symmetrical shape relative to a radial plane of the rotor, with two symmetrical attack faces 16 and 18, which allows the beater 14, in case of wear, for example face 16, to be turned over to work with face 18.
  • the beater In the middle region, between these two attack faces 16 and 18, the beater has two opposite flat faces 20, 22, the leading edges 16 and 18 being slightly inclined relative to the faces 20, 22 so as to give the beater a section in the form of an "S" stretched.
  • each beater 14 On each of the two sides 20 and 22 of each beater 14 are provided machined support points, either in the form of an isolated stud as shown in 24, or in the form of an elongated tongue as shown in 26, or a combination of the two . These studs 24 or tongues 26 form perfectly flat bearing surfaces without the need to have to machine the entire surface of the sides 20 and 22.
  • the housings 12 of the beaters 14 are lined laterally by distribution bars 28, 30 which extend over the entire length of the rotor and which are fixed, for example, by welding on the discs 10. These bars 28, 30 are intended to distribute the stresses resulting from the tightening of the beaters 14 as well as that of the shocks, during work, on the discs 10 and the rotor assembly.
  • wear bars 32 and 34 which are screwed onto the distribution bars and which serve as bearing surfaces for the beaters 14 and the fixing blocks thereof. These bars 32 and 34 which receive and transmit shocks and stresses to the distribution bars 28 and 30 can be easily replaced in the event of wear.
  • One of the distribution bars in the example shown, the bar 28, is associated with means for axial and radial positioning of a beater 14.
  • These means consist of two cylindrical studs 36 which are engaged in semi-housings -cylindrical corresponding to the two ends of the bar 28 and its wear bar 32.
  • These studs 36 also comprise, each, an enlarged head 38, respectively fixed for example by means of screws 40 on the opposite sides of the bar 28.
  • the beater 14 for its part, comprises (see FIG. 2), on each of its sides 20 and 22 and at each of its ends, also semi-cylindrical housings 42, complementary to the studs 36 and semi-cylindrical housings 44 enlarged, complementary to their head 38 to receive it (see also Figure 3).
  • the radial position of the beater 14 relative to the bar 28 is therefore perfectly determined thanks to these studs 36 and their head 38 as well as their housings in the bar 28 and in the beater 14.
  • the enlarged head 38 of the studs 36 also determines , the axial position of the beater relative to the rotor. This radial and axial positioning offers great ease during assembly of the beater and constitutes a security against possible release under the effect of centrifugal force during operation.
  • the beater 14 On the side opposite to the radial and axial positioning, the beater 14 is associated with a tangential fixing and clamping system (see Figure 3).
  • the rotor and the beater are designed to turn in a clockwise direction, that is to say that the means for positioning the beater are, seen in the direction of rotation, behind the beater 14 and the fixing means in front.
  • this arrangement deserves preference because of the large bearing and shock absorption surface provided by the distribution bar 28 behind the beater 14, it is possible to reverse the system by providing for positioning in front of the beater 14 and the fixing behind.
  • the fixing is ensured by a series of fixing blocks 50 (see Figure 1), one of them being shown in perspective in Figure 4.
  • the number of these blocks 50 is variable, in particular depending on the application which can be adapted as required. The more fixing blocks there are, the better the fixing and the connection between the beater 14 and the rotor. On the other hand, the assembly and disassembly of a beater will be all the faster when there are fewer fixing blocks 50.
  • each block 50 comprises, for this purpose, on the rear face, a pad 54 of section complementary to that of the groove 52.
  • a slide 56 inclined with respect to a diametrical plane of the rotor so that, when the blocks 50 are in place, the slide is, on the outside of the housings 12, closer to the beater 14 than on the inside.
  • a clamping wedge 58 with a flat front face 60 and a rear face 62 (see Figure 3) which has, relative to the flat face 60, the same inclination as the slide 56. Consequently, when the corner 58 slides in the slide 56, its front face 60 undergoes a translation parallel to itself with a tangential component relative to the beaters 14.
  • the slide 56 has, in the example presented, inclined and re-entrant lateral edges 56a, 56b giving the slide a dovetail section, while the corner 58 has longitudinal lateral edges 58a with corresponding outward inclination.
  • Other shapes, such as hammer head or other, are possible to prevent the lateral dislocation of these two parts.
  • the base of the corner 58 is engaged by transverse sliding in a shoe 62 which can be connected to the block 50 using tightening bolts 64, 66.
  • the shoe 62 makes the corner 60 slide in the slide 56 which, in turn, imposes on the corner 58 a component of transverse movement in the tangential direction of the rotor. Since the shoe must remain aligned with the block 50 because of the bolts 64, 66, the sliding of the corner 60 in the block 50 also generates a relative transverse sliding movement between the corner 58 and the shoe 62.
  • the rotor For mounting a beater 14, the rotor is rotated in a determined angular position, for example, so that the housing of the beater is oriented at nine o'clock.
  • the positioning pads 36 are then put in place which are made to hold by their fixing screws 40.
  • the beater 14 can then be engaged radially in its housing and be deposited on the wear bar 32, while the correct positioning is achieved by tightening the screws 40 of the positioning pads.
  • On the upper side of the beater 14 are then threaded a desired number of fixing blocks 50, in the loose state, into the groove 52 of the bar 30 and positioned correctly, preferably regularly in the longitudinal direction.
  • each of the blocks 50 are tightened, which causes the corners 58 to slide in the slide 56 and a tangential tightening movement in the direction of the beater 14 on the tabs 26 or machined studs 24 thereof. this.
  • the beater 14 is firmly anchored in its housing with a rigid and uniform connection over the entire length with the rotor.
  • the disassembly of a beater is done according to the same scenario in reverse order. After the bolts 64 and 66 of the blocks 50 have been loosened, it may however be necessary to unlock the corners 58 by hammer blows on their heads. In the event of significant fouling, it is always possible to cut the bolts between the shoes 62 and the blocks 50.
  • the fixing blocks 50 offer the advantage of easy access of the bolts 64 and 66 for tightening or loosening.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
EP97200174A 1996-02-02 1997-01-21 Rotor für Prallbrecher Withdrawn EP0787529A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9600094 1996-02-02
BE9600094A BE1009998A3 (fr) 1996-02-02 1996-02-02 Rotor pour concasseur a percussion.

Publications (1)

Publication Number Publication Date
EP0787529A1 true EP0787529A1 (de) 1997-08-06

Family

ID=3889512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97200174A Withdrawn EP0787529A1 (de) 1996-02-02 1997-01-21 Rotor für Prallbrecher

Country Status (3)

Country Link
EP (1) EP0787529A1 (de)
JP (1) JPH09323045A (de)
BE (1) BE1009998A3 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017127679A1 (de) * 2017-11-23 2019-05-23 Keestrack N.V. Schlagleiste
CN111408446A (zh) * 2020-04-18 2020-07-14 台州市久鼎金属贸易有限公司 一种采用整体式锤体的转子总成
US11446674B2 (en) 2017-11-23 2022-09-20 Keestrack N.V. Blow bar

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747803A (en) * 1952-07-09 1956-05-29 Pettibone Mulliken Corp Hammer rotor for hammermills
FR2340771A1 (fr) * 1976-02-14 1977-09-09 Hazemag Andreas Kg Barreau de percussion pour rotors de broyeurs a impact
EP0209757A2 (de) * 1985-07-17 1987-01-28 Hermann Schrödl Schlagleiste für einen Prallbrecherrotor
US4821970A (en) * 1988-05-13 1989-04-18 Telsmith, Inc. Impact crusher
US5004169A (en) * 1989-11-22 1991-04-02 Cedarapids, Inc. Impeller bar assembly with adjustable locking mechanism
EP0666111A1 (de) * 1994-02-04 1995-08-09 Magotteaux International S.A. Rotor für Hammerbrecher

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747803A (en) * 1952-07-09 1956-05-29 Pettibone Mulliken Corp Hammer rotor for hammermills
FR2340771A1 (fr) * 1976-02-14 1977-09-09 Hazemag Andreas Kg Barreau de percussion pour rotors de broyeurs a impact
EP0209757A2 (de) * 1985-07-17 1987-01-28 Hermann Schrödl Schlagleiste für einen Prallbrecherrotor
US4821970A (en) * 1988-05-13 1989-04-18 Telsmith, Inc. Impact crusher
US5004169A (en) * 1989-11-22 1991-04-02 Cedarapids, Inc. Impeller bar assembly with adjustable locking mechanism
EP0666111A1 (de) * 1994-02-04 1995-08-09 Magotteaux International S.A. Rotor für Hammerbrecher

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017127679A1 (de) * 2017-11-23 2019-05-23 Keestrack N.V. Schlagleiste
DE102017127679B4 (de) 2017-11-23 2020-04-23 Keestrack N.V. Schlagleiste
US11446674B2 (en) 2017-11-23 2022-09-20 Keestrack N.V. Blow bar
CN111408446A (zh) * 2020-04-18 2020-07-14 台州市久鼎金属贸易有限公司 一种采用整体式锤体的转子总成

Also Published As

Publication number Publication date
JPH09323045A (ja) 1997-12-16
BE1009998A3 (fr) 1997-11-04

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