EP4344781A1 - Prallbrecher mit horizontaler welle - Google Patents

Prallbrecher mit horizontaler welle Download PDF

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Publication number
EP4344781A1
EP4344781A1 EP22199079.9A EP22199079A EP4344781A1 EP 4344781 A1 EP4344781 A1 EP 4344781A1 EP 22199079 A EP22199079 A EP 22199079A EP 4344781 A1 EP4344781 A1 EP 4344781A1
Authority
EP
European Patent Office
Prior art keywords
pivot
pivot shaft
impact crusher
support plate
horizontal shaft
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
EP22199079.9A
Other languages
English (en)
French (fr)
Inventor
Andreas Forsberg
Knut Kjaerran
Rowan Dallimore
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.)
Sandvik SRP AB
Original Assignee
Sandvik SRP AB
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 Sandvik SRP AB filed Critical Sandvik SRP AB
Priority to EP22199079.9A priority Critical patent/EP4344781A1/de
Publication of EP4344781A1 publication Critical patent/EP4344781A1/de
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
    • B02C13/02—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

Definitions

  • This invention relates to a horizontal shaft impact crusher having a curtain, mounted on a pivot shaft, against which material accelerated by an impeller can be crushed in which the curtain can be adjusted by an adjustment system between primary and secondary crushing settings.
  • Horizontal shaft impact crushers are utilized in many applications for crushing hard material such as pieces of rock, ore etc.
  • a horizontal shaft impact crusher is generally made up of a housing having an inlet for material to be crushed, an outlet for material that has been crushed, an impeller, mounted on a horizontal shaft in the crusher housing, operative for rotating around a horizontal axis, a curtain mounted between pivot points against which material accelerated by the impeller may be crushed, and an adjustment bar for adjusting the position of said curtain relative to the impeller.
  • Pieces of rock are fed towards the impeller and are struck by beater elements mounted on the impeller. The pieces of rock are disintegrated by being struck by the beater elements and are accelerated and thrown against the curtains where further disintegration occurs.
  • the action of the impeller thus causes the material fed to the horizontal shaft impact crusher to move freely in a crushing chamber and to be crushed upon impact against the beater elements, against the curtains, and against other pieces of material moving around at high speed in the crushing chamber.
  • the position of the curtain can be adjusted between first and second crushing settings e.g. between primary and secondary or between secondary and tertiary etc. crushing settings.
  • the adjustment is typically made by altering the position of the pivot points to vary the distance between the curtain and the impeller.
  • movement of the pivot points generally requires manual handling and the use of lifting equipment which can expose operatives to safety hazards.
  • suitable lifting equipment may not always be available on site. Adjustment of the position of the curtain may also be required to compensate for both curtain wear and beater element wear.
  • An object of the invention is to overcome at least some of the problems of the prior art.
  • a horizontal shaft impact crusher comprising:
  • the adjustment system further comprises a second rotatable pivot shaft support plate defining the second pivot point and a connector extending between the first pivot shaft support plate and the second pivot shaft support plate to enable synchronised positioning of the pivot points.
  • the use of the second rotatable pivot shaft support plate and the connector allows for the effective and simultaneous repositioning of the pivot points.
  • the pivot shaft support plate is attached to the pivot shaft towards a free end of the pivot shaft. This facilitates ease of attachment of the pivot shaft support plate to the pivot shaft.
  • the pivot shaft support plate is an annular plate having an eccentrically positioned pivot shaft receiving opening.
  • the pivot shaft receiving opening is spatially moved upon rotation of the annular plate to reposition the pivot point.
  • the annular plate is an annular disc to allow for circumferential contact with the drive.
  • the annular disc is a gear and the drive comprises a complementary drive gear engageable with the gear to effect rotation of the gear.
  • the drive comprises a complementary drive gear engageable with the gear to effect rotation of the gear.
  • the gear is an eccentric gear.
  • the eccentric gear provides for easy repositioning of the pivot points.
  • the horizontal shaft impact crusher further comprises a motor for powering the drive gear.
  • the drive gear can therefore be operated independently of the crusher motor to allow for pivot point repositioning with the crusher motor switched off.
  • the drive gear and the motor are mounted on the crusher housing.
  • the crusher housing therefore supports the drive gear and the motor.
  • the drive comprises a linear drive engageable with the pivot shaft support plate to effect rotation of the pivot shaft support plate. This provides an alternative to the use of a drive gear.
  • the linear drive comprises a hydraulic ram and cylinder.
  • a hydraulic ram and cylinder can be in fluid communication with the hydraulic system of the crusher.
  • the linear drive further comprises a linkage between the hydraulic ram and the pivot shaft support plate.
  • the linkage facilitates rotation of the pivot shaft support plate.
  • the linear drive comprises a pneumatic linear drive.
  • a pneumatic linear drive can be operated independently of the crusher hydraulic system.
  • the linear drive comprises a mechanical linear drive.
  • a mechanical linear drive can be operated independently of the crusher hydraulic system and can be operated manually if required.
  • the first crushing setting is a primary crushing setting and the second crushing setting is a secondary crushing setting. Accordingly, the curtains can be positioned as required in accordance with the crushing action required.
  • Figures 1 and 2 show a horizontal shaft impact crusher 10 of the invention provided with curtain adjustment systems 20.
  • the horizontal shaft impact crusher 10 comprises a housing 15 having an inlet 30 for receiving material to be crushed, an outlet 40 for material that has been crushed and an impeller 50 within the housing 15.
  • a crusher motor not illustrated for reasons of maintaining clarity of illustration, is operative for rotating a horizontal shaft 60 on which the impeller 50 is mounted.
  • the impeller 50 may rotate around the shaft 60. In either case, the impeller 50 is operative for rotating around a horizontal axis, coinciding with the centre of the horizontal shaft 60.
  • the housing 15 is provided with a plurality of wear protection plates 16 that are operative for protecting the walls of the housing 15 from abrasion and from impact by the material to be crushed. Furthermore, the housing 15 comprises a bearing 17 for the horizontal shaft 60. A lower feed plate (not shown) and an upper feed plate (not shown) are arranged at the inlet 30. The feed plates are operative for providing the material fed to the crusher 10 in a suitable direction with respect to the impeller 50.
  • the housing 15 houses a first upper curtain 70, and a second lower curtain 80.
  • Each curtain 70,80 comprises at least one wear plate 73,83 against which material may be crushed.
  • the illustrated impeller 50 has four beater elements 51 with each beater element 51 having a bent shape, as shown particularly in Figure 1 .
  • the area formed between the impeller 50 and the first and second curtains 70,80 can be called a crushing chamber 11 of the crusher 10.
  • An upper end 71 of the first curtain 70 is mounted on a horizontal first pivot shaft 90 and an upper end 81 of the second curtain 80 is mounted on a horizontal second pivot shaft 100 so that the pivot shafts 90,100 are suspended in the housing 15.
  • Material to be crushed first reaches the first curtain 70, being located upstream of the second curtain 80 as seen with respect to the direction of travel of the material.
  • the material is directed towards the impeller 50 rotating at, typically, 400-850 rpm.
  • the material is hit by the beater elements 51 it is crushed and accelerated against the wear plates 73 of the first curtain 70 where further crushing occurs.
  • the material bounces back from the first curtain 70 and is crushed further against material travelling in the opposite direction and, again, against the beater elements 51.
  • the material has been crushed to a sufficiently small size it moves further down the crusher chamber 11 and is accelerated, by means of the beater elements 51, towards the wear plates 83 of the second curtain 80, being located downstream of the first curtain 70.
  • the material moves freely around in the crushing chamber 11 and is crushed against the beater elements 51, against the wear plates 73,83 respectively of the curtains 70,80 and against other pieces of material circling around, at a high velocity, in the crusher 10.
  • a curtain adjustment system 20 is provided on each pivot shaft 90,100 towards a free end of each pivot shaft 90,100 and is axially rotatable to adjust the distance between the curtains (70,80) and the impeller (50) so that the curtains (70,80) can be easily adjusted between a first crushing setting such as a primary crushing setting shown in Figures 1 to 4 and a second crushing setting such as a secondary crushing setting shown in Figure 5 .
  • the first pivot shaft 90 extends beyond pivot shaft openings (not shown) in the housing 15 to define first and second free ends 190,200 of the first pivot shaft 90 and a curtain adjustment system 20 is provided at both the first free end 190 and the second free end 200.
  • the second pivot shaft 100 extends beyond openings (not shown) in the housing 15 to define first and second free ends 210,220 of the second pivot shaft 100 and a curtain adjustment system 20 is provided at the first free end 210 and the second free end 220.
  • a curtain adjustment system 20 can be provided at either free end 190,200 and 210,220 of the pivot shafts 90,100 respectively.
  • FIGS 3 and 4 show enlarged views of the upper curtain adjustment system 20 of Figure 2 at the free end 190 of the pivot shaft 90 - the adjustment system 20 at the opposite free end 200 of the pivot shaft 90 being identical in configuration.
  • adjustment systems 20 at the free ends 210,220 of the pivot shaft 100 are identical in construction to the adjustment system 20 of Figures 3 and 4 described in more detail below.
  • the adjustment system 20 is generally made up of an axially rotatable pivot shaft support plate 150 for supporting the pivot shaft 90 towards its free end 190 at a first pivot point 110 defined in the pivot shaft support plate 150.
  • the pivot shaft support plate 150 is rotatably mounted on a mounting ring 151 secured to the housing 15 so that the adjustment system 20 is supported on the housing 15 by the mounting ring 151 at the pivot shaft opening.
  • the pivot shaft support plate 150 is an annular plate 230 in the form of an annular disc 245 provided with an eccentrically positioned pivot shaft receiving opening 240, which defines the first pivot point 110, towards the periphery of the disc 245.
  • the pivot shaft support plate 150 therefore serves to support the pivot shaft 90 at the eccentric pivot point 110 to mount the pivot shaft 90 in the housing 15 to in turn suspend the curtain 70 in the crushing chamber 11 (see also Figure 1 ).
  • the pivot shaft 90 is supported at a second pivot point 120 similarly defined in a second identical pivot shaft support plate 170 of an adjustment device 20 at its opposite free end 200.
  • the pivot shaft 100 of the lower curtain 80 is supported between first and second pivot shaft support plates 155,175 identical in configuration to the pivot shaft support plates 150,170.
  • the annular disc 245 is a gear 250, which in the present embodiment is an eccentric gear 250 which can be axially rotated by a drive 160 in the form of a complementary drive gear 260 engaged with the eccentric gear 250.
  • the complementary drive gear 260 is rotatably mounted on the crusher housing 15 beneath the eccentric gear 250 and is powered by a motor 270 also mounted on the housing 15 at a motor mounting bracket 280. Accordingly, axial rotation of the support plate 150, which in the present embodiment is the eccentric gear 250, is effected by the drive gear 260 so that the position of the of the first pivot point 110 can be adjusted between first and second crushing settings. Similarly, axial rotation of the second support plate 170 results in the adjustment of the position of the second pivot point 120 between first and second crushing settings.
  • a connector 180 which can be a bar (not shown), extends between the first and second support plates 150,170 and enables simultaneous and synchronised positioning of the pivot points 110,120.
  • the motor 270 is activated to rotate the drive gear 260 to in turn effect axial rotation of the eccentric gear 250.
  • This action is simultaneously performed at the pivot shaft support plate 150 and the second pivot shaft support plate 155 at the free end 190,200 of the pivot shaft 90.
  • the positions of the first and second pivot points 110,120 are adjusted between the first and second crushing settings, e.g. primary and secondary cutting setting in a safe manner without requiring manual intervention or the use of lifting equipment.
  • the positions of the first and second pivot points 130,140 on first and second pivot shaft support plates 155,175 of the lower curtain 80 can be adjusted in a similar manner.
  • the drive 160 can be a linear drive such as a hydraulic ram and cylinder, a pneumatic linear drive or a mechanical linear drive engageable with the pivot shaft support plate 150,155,170,175 to effect rotation of the pivot shaft support plate 150,155,170,175.
  • the hydraulic linear drive can also include a linkage between the hydraulic ram and the support plate 150,155,170,175.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
EP22199079.9A 2022-09-30 2022-09-30 Prallbrecher mit horizontaler welle Pending EP4344781A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22199079.9A EP4344781A1 (de) 2022-09-30 2022-09-30 Prallbrecher mit horizontaler welle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22199079.9A EP4344781A1 (de) 2022-09-30 2022-09-30 Prallbrecher mit horizontaler welle

Publications (1)

Publication Number Publication Date
EP4344781A1 true EP4344781A1 (de) 2024-04-03

Family

ID=83546719

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22199079.9A Pending EP4344781A1 (de) 2022-09-30 2022-09-30 Prallbrecher mit horizontaler welle

Country Status (1)

Country Link
EP (1) EP4344781A1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1166593B (de) * 1960-09-13 1964-03-26 Hazemag Hartzerkleinerung Prallmuehle
DE8813467U1 (de) * 1988-10-10 1989-02-02 Gronholz, Claus, Dipl.-Ing., 22851 Norderstedt Prallbrecher
EP0496721A1 (de) * 1991-01-21 1992-07-29 Hermann Schrödl Rotationsbackenbrecher
EP0513479A1 (de) * 1991-05-17 1992-11-19 Krupp Fördertechnik GmbH Prallbrecher und Verfahren zum Einstellen des Arbeitsspaltes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1166593B (de) * 1960-09-13 1964-03-26 Hazemag Hartzerkleinerung Prallmuehle
DE8813467U1 (de) * 1988-10-10 1989-02-02 Gronholz, Claus, Dipl.-Ing., 22851 Norderstedt Prallbrecher
EP0496721A1 (de) * 1991-01-21 1992-07-29 Hermann Schrödl Rotationsbackenbrecher
EP0513479A1 (de) * 1991-05-17 1992-11-19 Krupp Fördertechnik GmbH Prallbrecher und Verfahren zum Einstellen des Arbeitsspaltes

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