[go: up one dir, main page]

WO1996019283A1 - Arrangement pour proteger les paliers de rotors dans un materiel du type broyeur a broches - Google Patents

Arrangement pour proteger les paliers de rotors dans un materiel du type broyeur a broches Download PDF

Info

Publication number
WO1996019283A1
WO1996019283A1 PCT/FI1995/000701 FI9500701W WO9619283A1 WO 1996019283 A1 WO1996019283 A1 WO 1996019283A1 FI 9500701 W FI9500701 W FI 9500701W WO 9619283 A1 WO9619283 A1 WO 9619283A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
rotors
vanes
arrangement
scraper
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.)
Ceased
Application number
PCT/FI1995/000701
Other languages
English (en)
Inventor
Hannu Virtanen
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.)
Megatrex Oy
Original Assignee
Megatrex Oy
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 Megatrex Oy filed Critical Megatrex Oy
Priority to AU42629/96A priority Critical patent/AU4262996A/en
Publication of WO1996019283A1 publication Critical patent/WO1996019283A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B02C13/205—Disintegrating by mills having rotary beater elements ; Hammer mills with two or more co-operating rotors arranged concentrically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/10—Maintenance of mixers
    • B01F35/145—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
    • B01F2035/35—Use of other general mechanical engineering elements in mixing devices
    • B01F2035/351—Sealings
    • B01F2035/3513—Sealings comprising a stationary member in frontal contact with a movable member

Definitions

  • the present invention relates to an arrangement according to the preamble of claim 1 for protecting the bearings of two concentrically mounted rotors in, e.g., a mill, mixer or other similar equipment.
  • the industry uses a variety of different mills, mixers, gas scrubbers and other apparatuses incorporating two concentrically mounted elements rotating in opposite directions to perform a milling, mixing or other similar function.
  • These elements typically comprise interplaying- ly arranged rotors whose perimeters are provided with rings carrying impact stop elements.
  • the purpose of the rotors is to subject the material to be milled or mixed to high acceleration imparted by maximally large speed differences between the rotors, or alternatively, to a great number of local impacts of high momentum.
  • the goal of the invention is achieved by virtue of adapting, close to the plate located in the rotor housing of the apparatus on the bearing side, that is, the rotor housing bottom plate, a centrifugally acting scraper vane plate that blows material landing on the bottom plate radially outward and additionally adapting close to the scraper vane plate a labyrinth seal via which an air flow induced by the vacuum generated by the scraper vane plate is passed to the scraper vane plate.
  • the invention offers significant benefits.
  • Figure 1 is a partially sectional side view of an appa ⁇ ratus equipped with the arrangement according to the invention.
  • Figure 2 is a more detailed view of the arrangement illustrated in Fig. 1.
  • the apparatus shown therein is a two-rotor pin-mill-type mixer having five inter- playing vane rows 3 - 7.
  • the rotors 1, 2 are mounted on coaxially adapted shafts 8, 9, respectively, and the feed opening 10 of the mixer is disposed to the opposite side of the apparatus relative to the shafts 8, 9.
  • the shafts 8, 9 are mounted rotatable on bearings with respect to a shaft support housing 11 and each other. As the construc ⁇ tion of the bearing arrangement is not related to the invention, its closer description will be omitted herein.
  • the shafts 8, 9 and the rotors 1, 2 are rotated by sheaves 12, 13, which are mounted on the shafts and are driven by a V-belt drive.
  • the lower rotor 2 is mounted on the outer drive shaft 8, while the drive shaft 9 of the upper rotor 1 is passed through the outer shaft 8 and the center of the lower rotor 2 to the upper rotor 1.
  • the innermost row 2, the center row 5 and the outermost row 7 are connected to the upper rotor 1
  • the second row 4 and the fourth row 6, which are adapted to run interplayingly in the inter- row spaces remaining between the vane rows of the upper rotor.
  • the rotors 1, 2 are enclosed in a rotor housing comprising a bottom plate 14, through which the shafts 8, 9 are passed, and a top plate 15, to which an infeed opening 10 is attached, and a side wall 16 encircling the rotors 8, 9 at a distance from their perimeter.
  • the above-described apparatus is operated by rotating the rotors 8, 9 either in the same direction with a speed differential between the rotors or in opposite direc ⁇ tions.
  • the materials to be mixed are passed via the infeed opening 10 to the center of the rotors, wherefrom the materials are accelerated radially by virtue of the rotational movement of the rotors.
  • a strong mixing action is achieved and simulta- neously the mixture is blown by the vanes against the side wall 16 and will subsequently be removed from the apparatus via a discharge opening made to the side wall 16.
  • a vacuum is generated at the infeed opening.
  • an annular labyrinth seal 20 with one end of the labyrinth opening in a slot 21 provided at the shaft entry point and the other end just behind the scraper vanes.
  • the labyrinth seal 20 forms a path for an air flow from the ambient atmosphere to the mixer chamber, behind the scraper vanes 18.
  • a compressed air channel 23 exiting in an interrotor space 24 remaining between the rotors 1 and 2, said space being sealed by means of two labyrinth seals.
  • Said interrotor space 24 exits in the slit formed between the rotors l and 2 enclosed by the rotor housing 15 - 17. Further along the air path, the upper surface of the scraper vane plate 19 is provided with channels 22 passing from the interrotor space 25 to the space remaining between the rotor 2 and the rotor housing bottom plate 14, in front of the scraper vanes 18. Facing the bottom plate, scraper vanes 17 of the upper rotor are respectively adapted on the perimeter of the upper rotor 1.
  • the rotor wheels of the apparatus have both the lower rotor 2 and the upper rotor 1 equipped with scraper vanes 17, 18 dimensioned to keep the rotor housing bottom plate 14 clean during the operation of the apparatus.
  • compressed air is supplied via the compressed air channel 23 into the apparatus for the purpose of providing indirect cooling of the seals and bearings.
  • the entering compressed air is partially discharged via the radial channels 22 made to the upper surface of the scraper vane plate 19 into the space 26 between the rotor housing bottom plate 14 and the lower rotor 2. This flow of compressed air sucks ambient air by its ejector effect from the slit 21 via the labyrinth seal 20.
  • the flow generated by the rotation ⁇ al movement of the rotors 1 and 2 generates an additional air flow via the same path through the labyrinth seal 20 due to the blower effect of the vanes rows 3 - 7 of the rotors.
  • the two scraper vane rows 17 and 18 provide continuous evacuation of material leaked into the lower space 26 of the pin mill, and the flushing air flow induced by two different mechanisms continuously expels the leaked material along with the flushing air flow toward the rotor housing perimeter on which the discharge opening for processed material is disposed.
  • the access of abrading materials to the seals and bearings is prevented by means of the two scraper vane rows 17 and 18 complemented with the radially passing flow of flushing air.
  • the air channels of the protection arrangement can be implemented in a number of different ways.
  • the number of scraper vanes may be selected freely, obviously at least two of them should be disposed in any vane row to keep the system dynamically balanced during running. While the mounting of the scraper vanes on the rotors may be varied, a small gap must be provided between the scraper vane edge and the rotor housing bottom plate to avoid unnecessary mechani ⁇ cal wear.
  • the row of scraper vanes 18 mounted on the lower rotor 2 is advantageously adapted to run as close as possible to the center of the apparatus so that the vanes run essentially near the smaller radius of the space remaining between the rotor housing bottom plate 14 and the lower rotor 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Abstract

L'invention concerne un arrangement pour protéger les paliers de deux rotors (1, 2) montés coaxialement dans un appareil tel qu'un broyeur, un malaxeur ou similaire, dans lequel les arbres d'entraînement (8, 9) des rotors (1, 2) s'étendent jusqu'à ces derniers (1, 2) depuis le même côté de l'appareil. Dans l'arrangement selon l'invention, une plaque à lames de racloir (18) à effet centrifuge qui projette le matériau arrivant sur la plaque de fond (14), radialement vers l'extérieur, est prévue à proximité de la plaque située dans le carter du rotor (14, 15, 16) de l'appareil, du côté paliers, c'est-à-dire la plaque de fond (14) du carter du rotor, ainsi qu'un joint à labyrinthe (20) à travers lequel un flux d'air induit par le vide est envoyé à la plaque à lames de racloir (18).
PCT/FI1995/000701 1994-12-22 1995-12-21 Arrangement pour proteger les paliers de rotors dans un materiel du type broyeur a broches Ceased WO1996019283A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU42629/96A AU4262996A (en) 1994-12-22 1995-12-21 Arrangement for protecting the bearings of rotors in pin-mill-type equipment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI946048A FI101638B (fi) 1994-12-22 1994-12-22 Sovitelma tappimyllytyyppisten laitteiden roottoreiden laakeroinnin su ojaamiseksi
FI946048 1994-12-22

Publications (1)

Publication Number Publication Date
WO1996019283A1 true WO1996019283A1 (fr) 1996-06-27

Family

ID=8542042

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1995/000701 Ceased WO1996019283A1 (fr) 1994-12-22 1995-12-21 Arrangement pour proteger les paliers de rotors dans un materiel du type broyeur a broches

Country Status (3)

Country Link
AU (1) AU4262996A (fr)
FI (1) FI101638B (fr)
WO (1) WO1996019283A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2131761C1 (ru) * 1998-03-25 1999-06-20 Пименов Юрий Александрович Виброкавитационный смеситель-гомогенизатор
WO1999054045A1 (fr) * 1998-04-16 1999-10-28 Megatrex Oy Procede et appareil de traitement de pulpe d'une usine de pate ou de papier
WO2001060521A1 (fr) * 2000-02-18 2001-08-23 Alexanderwerk Ag Logement d'un outil de travail dans une machine de production, notamment une presse a rouleaux, pour une matiere pulverulente
US6843886B1 (en) 1999-11-24 2005-01-18 Megatrex Oy Method for handling filled reject flows in a paper or paperboard mill
WO2008122691A1 (fr) 2007-04-10 2008-10-16 Fractivator Oy Broyeur à chocs

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4175873A (en) * 1976-09-10 1979-11-27 Funken Co., Ltd. Process and apparatus for mechanically mixing two immiscible liquids and one or more other substances

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4175873A (en) * 1976-09-10 1979-11-27 Funken Co., Ltd. Process and apparatus for mechanically mixing two immiscible liquids and one or more other substances

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DERWENT'S ABSTRACT, No. 87-340541/48, Week 8748; & SU,A,1 304 870 (IVAN AGRIC INST), 23 April 1987. *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2131761C1 (ru) * 1998-03-25 1999-06-20 Пименов Юрий Александрович Виброкавитационный смеситель-гомогенизатор
WO1999054045A1 (fr) * 1998-04-16 1999-10-28 Megatrex Oy Procede et appareil de traitement de pulpe d'une usine de pate ou de papier
US6843886B1 (en) 1999-11-24 2005-01-18 Megatrex Oy Method for handling filled reject flows in a paper or paperboard mill
WO2001060521A1 (fr) * 2000-02-18 2001-08-23 Alexanderwerk Ag Logement d'un outil de travail dans une machine de production, notamment une presse a rouleaux, pour une matiere pulverulente
WO2008122691A1 (fr) 2007-04-10 2008-10-16 Fractivator Oy Broyeur à chocs

Also Published As

Publication number Publication date
FI946048L (fi) 1996-06-23
AU4262996A (en) 1996-07-10
FI946048A0 (fi) 1994-12-22
FI101638B1 (fi) 1998-07-31
FI101638B (fi) 1998-07-31

Similar Documents

Publication Publication Date Title
CN110918203B (zh) 搅拌球磨机和搅拌球磨机的运行方法
US4380398A (en) Dispersion mixer
US6443376B1 (en) Apparatus for pulverizing and drying particulate matter
KR102559996B1 (ko) 분체 처리 장치
US5024754A (en) Separator
US2561564A (en) Pulverizing mill separator, having whizzer and directional vanes
US20180126387A1 (en) A comminuting machine comprising a rotor system and a method for comminuting feedstock
US3674241A (en) Mixing machine
JP7171202B2 (ja) 微粉砕機
KR20180042806A (ko) 교반기 볼 밀
KR870002125B1 (ko) 정미기
EP1008405A1 (fr) Appareil pour récupérer du sable de moulage
WO1996019283A1 (fr) Arrangement pour proteger les paliers de rotors dans un materiel du type broyeur a broches
US5944270A (en) Self-contained air seal assembly for coal pulverizer
US6318561B1 (en) Air classifier
KR950012298B1 (ko) 로우터리(rotary) 분쇄기
SU1636043A1 (ru) Центробежна мельница
US5474238A (en) Impact detacher
KR940004229B1 (ko) 충격식 분리기
JP6821278B1 (ja) 分離装置
JP2019136645A (ja) 微粉砕機
RU2060828C1 (ru) Измельчитель
JP3865562B2 (ja) 破砕装置の排出部構造
FI88589C (fi) Pulverisator
SU1393477A1 (ru) Мельница дл сверхтонкого измельчени сыпучих материалов

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU BB BG BR BY CA CH CN CZ DE DK EE ES FI GB GE HU IS JP KE KG KP KR KZ LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TT UA UG US UZ VN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): KE LS MW SD SZ UG AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA