US3845909A - Grinding apparatus for vegetable materials - Google Patents

Grinding apparatus for vegetable materials Download PDF

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Publication number
US3845909A
US3845909A US00357010A US35701073A US3845909A US 3845909 A US3845909 A US 3845909A US 00357010 A US00357010 A US 00357010A US 35701073 A US35701073 A US 35701073A US 3845909 A US3845909 A US 3845909A
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United States
Prior art keywords
conveyor
grinding
stuffing box
shaft
screw
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Expired - Lifetime
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US00357010A
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English (en)
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I Johansson
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C7/00—Crushing or disintegrating by disc mills
    • B02C7/02—Crushing or disintegrating by disc mills with coaxial discs
    • B02C7/06—Crushing or disintegrating by disc mills with coaxial discs with horizontal axis
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/30—Disc mills

Definitions

  • the invention relates to a grinding apparatus for vege- [76] Inventor: lnge J. G. .lohansson, Falkvagen 61, table material which is disintegrated in an interspace 183 50 Taby, Sweden between the opposed grinding surfaces of two grinding discs mounted rotatably in relation to one another [22] Filed May 1973 within a stationary frame. At least one of the grinding [21] Appl.
  • N0.: 357,010 discs is carried by a rotatable shaft which in turn is M surrounded concentrically by a screw conveyor for the 30 F
  • a P D t material to be disintegrated in the grinding interspace 1 M fg g ppslcadlon y a a which conveyor is driven at a substantially lower rotaay 1 we en "6254/72 tional speed than the shaft carrying the grinding disc.
  • ese stu mg oxes are supp ie UNITED STATES PATENTS with cooling water under pressure from a common 1,719,784 7/1929 ROSS t 241/67 source in uch a manner that the cooling water first 1,937,788 12/1933 Ross 241/66 X passes through the Stuffing box between the frame and ii zg 2: 55:11 al'm 22 2; the conveyor screw and therefrom to the stuffing box 3:467:323 gngg Asplund ct aim 241/247 between the conveyor screw and the rotatable shaft. 3,717,309 271 973 Luker et al. 241/247 3 Claims, 2 Drawing Figures Primary Examiner-Granville Y.
  • the invention relates to a grinding apparatus for vegetable materials of the type comprising two grinding discs mounted rotatably in relation to one another within a stationary frame, at least one of said grinding discs being carried by a rotatable shaft surrounded con centrically and freely by a screw conveyor from an inlet opening in the frame to the grinding surfaces of the discs. This conveyor is driven at a lower number of revolutions per minute than said shaft and serves to feed material to the grinding discs. Grinding apparatus of this kind are disclosed e.g. in the US. Pat. specification No. 3,467,323.
  • water is supplied to the stuffing box pressurized between the shaft and the conveyor which channels in turn communicate with a stationary supply channel from the pressure water source via the stuffing box located between the frame and the conveyor screw.
  • the object of both stuffing boxes is to prevent steam from escaping due to the over-riding pressure prevailing in the inlet opening and by reason of the over-riding pressure which is produced at the inner side of the grinding surfaces. These conditions arise also if the discharge side of the grinding space is under atmospheric pressure.
  • FIG. 1 is a lateral view, partially in vertical longitudinal section, of a portion of a grinding apparatus embodying the features of the invention.
  • FIG. 2 is a sectional view on a larger scale of the right hand portion of FIG. 1.
  • the material to be ground is fed to the zone 24 by means of a screw conveyor 26 which is mounted concentrically about the shaft 12 at a spaced distance 28 between the conveyor and the shaft.
  • the conveyor is provided with a suitably helically shaped worm member 30 extending between an inlet opening formed in the stationary frame for the material to be ground and the zone 24.
  • a hopper (not shown) is disposed over the inlet opening 32 and is kept filled with the material to be ground such as wood chips.
  • the screw conveyor 26 may be composed of a cylindrical tube 34 defining the space 28.
  • the outer end of the tube 34 is rigidly secured to a tubular member 36 having a thicker lateral wall. Connected with said tubular member is also a tapering tubular element 38 merging at its narrower end with the tube 34 and located directly below the opening 32. While the shaft 12 may rotate with an R.P.M. of l,800,the R.P.M. of the rotating screw conveyor is substantially less, such as ISO R.P.M.
  • the screw conveyor 26 is mounted in bearings at its external end only, e.g., by means of two ball bearings 40 between which a driving member, such as a gear wheel 42 is mounted for rotating the conveyor.
  • first stuffing box Disposed between the shaft 12 and the conveyor 26 is a first stuffing box generally denoted 44 and between the conveyor and the stationary frame 10 a second stuffing box generally denoted 46.
  • Both stuffing boxes may be of the same construction and each may comprise a'series of sealing rings 48 made of compressible conventional material and spaced from one another by a distributor or spacing ring 50 or 51, respectively,
  • stuffing box 46 is rigidly secured to the frame 10 and cooperates with a cylindrical sealing surface formed on the external side of the tubular member 36, and, if desired, provided with a separate lining 66.
  • the stuffing box 46 is. supportedby an annular element 68 secured to the frame and formed with an annular inner channel 70 which is supplied with cooling water through a channel 72 from a pressure water pump (not shown) connected to the frame.
  • the element 68 has channels 74 equally distributed about the circumference and connecting the channel 70 with the outer annular groove 54 of the distributor ring.
  • the stuffing box 44 is located in radial direction inside the bearings 40 and therefore, in axial direction outside the stuffing box 46.
  • a channel system 76 Formed in the annular member 36 of the screw conveyor is a channel system 76 which connects the grooves in the distributor ring 50 of the stuffing box 46 with the grooves in the distributor ring 51 of the stuffing box 44 so that said last-mentioned stuffing box also is supplied with cooling water under over-riding pressure.
  • this cooling water provides a flow of water through the space 28 between the shaft 12 and the screw conveyor 26 so as to prevent said space from being clogged by ground produce which would cause considerable wear and/or production of heat and increased consumption of power for the rotation of the shaft 12 due to the great R.P.M. differential between the shaft and the conveyor.
  • cooling water can be fed to the stuffing box 44 inspite of the fact that this stuff ing box is positioned between two parts both of which rotate.
  • the stuffing box 46 also serves the dual purpose of a sealing transfer device for the cooling water hetween the stationary frame and the stationary pressure water source and the rotating screw conveyor.
  • a grinding apparatus for vegetable materials, of the type comprising two grinding discs mounted rotatably in relation to one another within a stationary frame, at least one of said grinding discs being carried by a rotatable shaft surrounded concentrically and freely by a screw conveyor for feeding material to be ground from an inlet opening in the frame to the grinding surfaces of the discs, and driven at a lesser number of revolutions per minute than said shaft; the improvement which comprises a stuffing box disposed between the shaft and the conveyor laterally of the inlet opening, said stuffing box being supplied with water under pressure through channels formed in the conveyor which channels in turn communicate with a stationary feeding channel from an external pressure water source over a second stuffing box located between said frame and said conveyor screw.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Paper (AREA)
  • Disintegrating Or Milling (AREA)
  • Formation And Processing Of Food Products (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Cereal-Derived Products (AREA)
US00357010A 1972-05-10 1973-05-03 Grinding apparatus for vegetable materials Expired - Lifetime US3845909A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE625472 1972-05-10

Publications (1)

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US3845909A true US3845909A (en) 1974-11-05

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ID=20268237

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US00357010A Expired - Lifetime US3845909A (en) 1972-05-10 1973-05-03 Grinding apparatus for vegetable materials

Country Status (4)

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US (1) US3845909A (enrdf_load_stackoverflow)
JP (1) JPS5551625B2 (enrdf_load_stackoverflow)
CA (1) CA983751A (enrdf_load_stackoverflow)
NO (1) NO140477C (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2313498A1 (fr) * 1975-06-04 1976-12-31 Reinhall Rolf Dispositif evacuant la vapeur d'eau en exces dans une defibreuse
US4037801A (en) * 1976-03-01 1977-07-26 Electra Food Machinery, Inc. Grinding apparatus
US4081146A (en) * 1976-04-20 1978-03-28 Toshio Yagi Garbage disposal apparatus
DE2902049A1 (de) * 1978-01-24 1979-08-02 Defibrator Ab Einrichtung bei mahlapparaten fuer ligno-zellulose-haltiges mahlgut
US4166584A (en) * 1975-09-05 1979-09-04 Asplund Arne J A Apparatus for producing pulp from lignocellulose-containing material
US4167250A (en) * 1978-04-19 1979-09-11 The United States Of America As Represented By The Secretary Of Agriculture Sequential velocity disk refiner
EP0291410A1 (fr) * 1987-05-11 1988-11-17 C B R Innovation Procédé et installation pour l'extraction des sucs cellulaires de matières premières végétales et/ou de leurs sous-produits
US5722604A (en) * 1995-04-18 1998-03-03 Dudley; Russell D. Metal scrap shredder
US8366114B1 (en) 2009-06-10 2013-02-05 Gruner Daron M Stuffing box cooling system
DE102020105875A1 (de) 2020-03-05 2021-09-09 Voith Patent Gmbh Faserbehandlungsvorrichtung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1719784A (en) * 1926-02-26 1929-07-02 Mortimer G Ross Grinding machine
US1937788A (en) * 1927-12-01 1933-12-05 Oscar A Ross Colloidal mill and system of control therefor
US2751157A (en) * 1952-04-12 1956-06-19 Gutehoffnungshuette Oberhausen Grinding mill embodying coaxial oppositely rotating grinding disks
US3077007A (en) * 1958-11-05 1963-02-12 Curlator Corp Feed mechanism for machines for processing fibrous material
US3467323A (en) * 1964-09-25 1969-09-16 Defibrator Ab Grinding apparatus
US3717309A (en) * 1970-11-09 1973-02-20 H Luker Grinding mill

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1719784A (en) * 1926-02-26 1929-07-02 Mortimer G Ross Grinding machine
US1937788A (en) * 1927-12-01 1933-12-05 Oscar A Ross Colloidal mill and system of control therefor
US2751157A (en) * 1952-04-12 1956-06-19 Gutehoffnungshuette Oberhausen Grinding mill embodying coaxial oppositely rotating grinding disks
US3077007A (en) * 1958-11-05 1963-02-12 Curlator Corp Feed mechanism for machines for processing fibrous material
US3467323A (en) * 1964-09-25 1969-09-16 Defibrator Ab Grinding apparatus
US3717309A (en) * 1970-11-09 1973-02-20 H Luker Grinding mill

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2313498A1 (fr) * 1975-06-04 1976-12-31 Reinhall Rolf Dispositif evacuant la vapeur d'eau en exces dans une defibreuse
US4082233A (en) * 1975-06-04 1978-04-04 Rolf Bertil Reinhall Disc refiner having means for removing gaseous media from pulp stock
US4166584A (en) * 1975-09-05 1979-09-04 Asplund Arne J A Apparatus for producing pulp from lignocellulose-containing material
US4037801A (en) * 1976-03-01 1977-07-26 Electra Food Machinery, Inc. Grinding apparatus
US4081146A (en) * 1976-04-20 1978-03-28 Toshio Yagi Garbage disposal apparatus
DE2902049A1 (de) * 1978-01-24 1979-08-02 Defibrator Ab Einrichtung bei mahlapparaten fuer ligno-zellulose-haltiges mahlgut
US4167250A (en) * 1978-04-19 1979-09-11 The United States Of America As Represented By The Secretary Of Agriculture Sequential velocity disk refiner
EP0291410A1 (fr) * 1987-05-11 1988-11-17 C B R Innovation Procédé et installation pour l'extraction des sucs cellulaires de matières premières végétales et/ou de leurs sous-produits
FR2615072A1 (fr) * 1987-05-11 1988-11-18 Cbr Innovation Ste Civile Procede et installation pour l'extraction des sucs cellulaires de matieres premieres vegetales et/ou de leurs sous-produits
US5722604A (en) * 1995-04-18 1998-03-03 Dudley; Russell D. Metal scrap shredder
US8366114B1 (en) 2009-06-10 2013-02-05 Gruner Daron M Stuffing box cooling system
US9658001B2 (en) 2009-06-10 2017-05-23 Daron M. Gruner Stuffing box cooling system
DE102020105875A1 (de) 2020-03-05 2021-09-09 Voith Patent Gmbh Faserbehandlungsvorrichtung
CN115315316A (zh) * 2020-03-05 2022-11-08 福伊特专利有限公司 纤维处理装置

Also Published As

Publication number Publication date
NO140477C (no) 1979-09-05
CA983751A (en) 1976-02-17
NO140477B (no) 1979-05-28
JPS5551625B2 (enrdf_load_stackoverflow) 1980-12-25
JPS4947566A (enrdf_load_stackoverflow) 1974-05-08

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