EP0062011A2 - Horizontal axis hammer mill - Google Patents

Horizontal axis hammer mill Download PDF

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Publication number
EP0062011A2
EP0062011A2 EP82830061A EP82830061A EP0062011A2 EP 0062011 A2 EP0062011 A2 EP 0062011A2 EP 82830061 A EP82830061 A EP 82830061A EP 82830061 A EP82830061 A EP 82830061A EP 0062011 A2 EP0062011 A2 EP 0062011A2
Authority
EP
European Patent Office
Prior art keywords
rotor
hammers
crushed
hammer
horizontal axis
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Withdrawn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
EP82830061A
Other languages
German (de)
English (en)
French (fr)
Inventor
Tarcisio Pozzato
Mariano Pozzato
Alberto Pozzato
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0062011A2 publication Critical patent/EP0062011A2/en
Withdrawn legal-status Critical Current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
    • B02C13/20—Disintegrating by mills having rotary beater elements ; Hammer mills with two or more co-operating rotors
    • 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
    • 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
    • B02C13/286—Feeding or discharge
    • 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
    • B02C13/286—Feeding or discharge
    • B02C2013/2869—Arrangements of feed and discharge means in relation to each other

Definitions

  • the present invention relates to a horizontal axis hammer mill comprising, in a crushing chamber provided with a feed aperture for the inert material to be crushed and a discharge aperture for the crushed material, a main rotor having a horizontal axis, provided with a plurality of hammers projecting radially therefrom, at least one support with collision plates the position of which is adjustable relative to the said main rotor and a notor for driving the said rotor.
  • the problem which is.at the root of this invention is that of overcoming this obstacle and achieving supercharging, possibly controlled, of a hammer mill when desired.
  • the idea for solving the said technical problem is essentially that of throwing the material to be crushed into the crushing chamber at a velocity and along a trajectory which is strictly correlated with the actual speed of rotation of the hammer carrying rotor, so that the material is always reliably taken by the subsequent hammers, independently of the value of the speed of rotation thereof.
  • a hammer mill of the type considered above which is characterised in that it comprises, in the said crushing chamber and in correspondence with the feed aperture, a member for throwing-conveying the material to be crushed towards the said main hammer carrying rotor.
  • the said throwing-conveying member comprises a second rotor, supported with its axis of rotation horizontal and parallel to the axis of the said hammer carrying rotor, at least two hammers projecting radially from the said second rotor in positions diametrally opposite thereon, the said second rotor being keyed onto a shaft rotated by the said gear unit at a speed corresponding to the predetermined speed of rotation of the said main-hamper carrying rotor.
  • a horizontal axis hammer mill according to the invention is generally indicated 1 and conventionally comprises a support structure 2, defining within it a crushing chamber 3.
  • a main rotor 7 is rotatably supported in a conventional manner with its axis horizontal and is provided with four hammers 8, projecting radially from the said rotor at 90° from each other. More particularly the said rotor 7 is keyed onto a shaft 9 on which is also keyed a pulley 10, kinematically connected, for example through a belt 11, to a drive pulley 12 rotated by a motor 13.
  • a support 14 is pivoted to the upper part of the support structure 2 and-carries for example two collision plates 15, 16.
  • the position of this support 14 and the plates 15, 16 relative to the hammers 8 can be adjusted by means of a tie rod 17 actuated from outside the said support structure by conventional means not shown.
  • This support 18 is pivoted at 20 on the support structure 2 with its pivot axis parallel to that of the support 14 mentioned above.
  • the position of the said support 18 and plates 19 relative to the hammers 8 is also adjustable from outside the support structure 2, for example by operating a tie rod 20a.
  • collision plates 19 are formed essentially like the hammers 8 and that the distance between the collision plates 19 and the hammers 8 defines the grain size of the crushed material discharged from the mill 1.
  • the support structure 2 rotatably supports a second rotor 21 with its axis horizontal below the feed duct 5.
  • This rotor 21 is provided, in diametrally opposed positions, with two hammers 22 projecting radially therefrom.
  • the rotor 12 is keyed onto a shaft 23 rotatably supported by the support structure 2 at the same height as that of the shaft 9 on which the main rotor 7 is keyed.
  • a pulley 24 is keyed on the shaft 23 and connected kinematically with a corresponding pulley 25 keyed on the shaft 9, for example through a belt 27.
  • the diameters of the pulleys 24, 25 are predetermined such that the shaft 23 rotates at a predetermined speed correlated with the speed of rotation of the shaft 9.
  • a wall which divides the crushing chamber ⁇ 3 into two adjacent chambers: a crushing chamber 28 proper which is in direct communication with the discharge aperture 6, and a chamber 29 which communicates directly with the aperture 4 and its inlet duct 5 and in which is rotatably supported the said second rotor 21.
  • the upper edge of the wall 26 is substantially at the same level as the axes of rotation of the shafts .9 and 23.
  • the predetermined correlation imposed between the speed of rotation of the rotors 7 and 21 is such that the material to be crushed is thrown by the rotor 21 at a velocity and along a trajectory such that it is always reliably made to reach the rotor 7 between two successive hammers thereof, independently of the actual value of the velocity of the said rotor.
  • the technical problem of rejection of the inert material to be crushed by the hammer carrying rotor 7 is thus overcome. Indeed, when the velocity of the latter is increased in order to.increase the productivity of the mill, the velocity of the rotor 21, and hence that of the thrown material, also increases correspondingly.
  • the rotor 21 thus constitutes a member for throwing-conveying the material to be crushed towards the crushing rotor and is able to achieve a desired supercharging of the mill 1 when required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
EP82830061A 1981-03-31 1982-03-18 Horizontal axis hammer mill Withdrawn EP0062011A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT20833/81A IT1137318B (it) 1981-03-31 1981-03-31 Molino a martelli ad asse orizzontale con dispositivo di sovralimentazione controllata
IT2083381 1981-03-31

Publications (1)

Publication Number Publication Date
EP0062011A2 true EP0062011A2 (en) 1982-10-06

Family

ID=11172726

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82830061A Withdrawn EP0062011A2 (en) 1981-03-31 1982-03-18 Horizontal axis hammer mill

Country Status (5)

Country Link
EP (1) EP0062011A2 (enrdf_load_stackoverflow)
JP (1) JPS57174151A (enrdf_load_stackoverflow)
ES (1) ES8302480A1 (enrdf_load_stackoverflow)
GR (1) GR76142B (enrdf_load_stackoverflow)
IT (1) IT1137318B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0583515A1 (en) * 1992-07-31 1994-02-23 Evarest Boleslavovich Komarovsky Impact crushing of rock and ore
WO2002022269A1 (en) * 2000-09-14 2002-03-21 Mills Patent Management Improvements in the reversible and not reversible secondary and tertiary hammer mills
IT201700107927A1 (it) * 2017-09-27 2019-03-27 Stefano Marchetti Mulino ad impatto per la macinazione di materiale incoerente

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0583515A1 (en) * 1992-07-31 1994-02-23 Evarest Boleslavovich Komarovsky Impact crushing of rock and ore
WO2002022269A1 (en) * 2000-09-14 2002-03-21 Mills Patent Management Improvements in the reversible and not reversible secondary and tertiary hammer mills
JP2004524133A (ja) * 2000-09-14 2004-08-12 ミルズ パテント マネージメント ディ アントニオ パルミロ パオリーニ アンド コー，エス エヌ セー 反転可能および非反転性の二次ハンマミルおよび三次ハンマミルにおける改良
IT201700107927A1 (it) * 2017-09-27 2019-03-27 Stefano Marchetti Mulino ad impatto per la macinazione di materiale incoerente
WO2019064210A1 (en) * 2017-09-27 2019-04-04 Stefano Marchetti PERCUSSION MILL FOR MILLING A BULK MATERIAL

Also Published As

Publication number Publication date
JPS57174151A (en) 1982-10-26
IT8120833A0 (it) 1981-03-31
IT1137318B (it) 1986-09-10
ES510929A0 (es) 1983-02-01
GR76142B (enrdf_load_stackoverflow) 1984-08-03
ES8302480A1 (es) 1983-02-01

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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STAA Information on the status of an ep patent application or granted ep patent

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18W Application withdrawn

Withdrawal date: 19840207