US3841573A - Grinding apparatus for fibrous material - Google Patents

Grinding apparatus for fibrous material Download PDF

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Publication number
US3841573A
US3841573A US00288944A US28894472A US3841573A US 3841573 A US3841573 A US 3841573A US 00288944 A US00288944 A US 00288944A US 28894472 A US28894472 A US 28894472A US 3841573 A US3841573 A US 3841573A
Authority
US
United States
Prior art keywords
stator
grinding device
cylindrical part
housing
stock
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.)
Expired - Lifetime
Application number
US00288944A
Other languages
English (en)
Inventor
A Kahmann
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.)
Sulzer Escher Wyss GmbH
Original Assignee
Escher Wyss GmbH
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
Priority claimed from DE19712146547 external-priority patent/DE2146547C3/de
Application filed by Escher Wyss GmbH filed Critical Escher Wyss GmbH
Application granted granted Critical
Publication of US3841573A publication Critical patent/US3841573A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D21D1/303—Double disc mills
    • 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
    • B02C7/11—Details
    • B02C7/14—Adjusting, applying pressure to, or controlling distance between, discs

Definitions

  • the invention relates to a grinding device, more especially a disc refinerfor the paper industry, which device comprises, in a housing having two end covers, a rotor and a stator which is displaceable axially rela' tively to the rotor and which is guided radially but nonrotatably in relation to the housing in guideways on the housing, which stator is connencted to a cylindrical part which is coaxial with the stator and the grinding device, the said part extending outwardly through a central opening in one of the end covers and being sealed'off relatively to the central opening.
  • Such grinding devices are used in the paper industry for preparing the stock to be treated in a paper machine. Since the guideways in the known constructions are arranged on the periphery of the displaceable stator in the housing, the fibres which are inthe stock cause a clogging of the guideways. In time, the displacement of the stator for the mutual adjustment relatively to the rotor is blocked and as a result it becomes necessary to stop the grinding device.
  • Constructions are also known in which the stator is guided by means of rods which are perpendicular to it and which are mounted for sliding movement in the end cover.
  • the deposited fibres also remain adhering to these rods and in time block the displacement.
  • the invention has for its object to increase the freedom from disruption and the effective life of the grinding device.
  • this object is achieved by the guideways of the displaceable stator being disposed outside the range of the stock which is to be ground.
  • each guideway comprises a sleeve which is parallel to the axis of the grinding device and a bolt mounted for displacement in the said sleeve, the guideways being connected by arms to the cylindrical part.
  • the drawing shows a grinding device according to the invention in longitudinal section.
  • the shown device is a tandem-disc refiner, which comprises a rotor 4 in a housing 1 which has a first end cover 2 and a second end cover 3.
  • the rotor 4 is supported by means of a shaft 7 between a stator 5which is fixed on the end cover 2 and a displaceable stator 6.
  • the shaft 7 is mounted in a bearing block 8 so as to be fast radially of the housing 1 but axially displaceable, and is sealed off. It is connected while being axially displaceable to a driving motor (not shown).
  • the displaceable stator 6 is formed with a central opening9 and is connected by means of spokes 10 to a cylindrical part 11 which is coaxial with the stator and the grinding device, the said part extending outwardly through a central opening 12 of the end cover 3 and being sealed off relatively to the central opening 12.
  • the stator 6 is displaceable axially in relation to the rotor 4, but with respect to the housing 1, this stator 6 is guidedradially and non-rotatably be means of guideways 13.
  • the guideways 13, of which those indicated ad 13' and 13" are visible in the drawing, are situated outside the range of the stock which is to be ground. What is understood by the range of the stock is the region of the passage of I the stock through the grinding device.
  • the stock, arriving through the entry opening 14 which opens tangentially into the housing 1, is moved in approximately helical form in the space between the end cover 3 and the displaceable stator 6,.passes through the opening 9 and advances partially through the gap 15, partially through the rotor 4 formed with openings 16 and through the gap 17, whereafter it leaves the grinding device through an outlet opening 18.
  • the guideways 13 are arranged on the outside of the end cover 3 and are connected to the cylindrical part 11 by connecting elements, a bolt 19 and an arm 20. These elements 19 and 20 also lie outside the range of the stock to be ground.
  • the guideways 13 are arranged, each offset by so as to have circular symmetry around the axis of the grinding device. In the longitudinal section, only the guideway indicated at 13' is to be seen. The second, in side elevation, is indicated at 13'. The third guideway cannot be seen in the drawing.
  • Each guideway 13 comprises a sleeve 21 which is parallel to the axis of the grinding device and is fixed on the end cover 3, and a bolt 19 mounted to be displaceable in the sleeve 21.
  • the bolt 19 is fixed on the arm 20, which is connected at the other end to the cylindrical part 11. Because of the arrangement of the guideways 13 outside the range of the stock to be ground, the fibres which are in this stock are unable to interfere with the freedom of movement of the guideways.
  • the movement of the displaceable stator 6 is assured by means of a hydraulic servomotor 22, of which the piston 23 is connected to the cylindrical part 11.
  • the part 11 serves as a piston rod of the motor 22.
  • a grinding device including a housing having two end covers and containing a stator disc which is provided with a central opening and which, with an adjacent one of said end covers, bounds a space which is charged with stock during operation of the grinding device, the stator disc being movable axially relatively to a rotor disc with which it defines a grinding gap and being connected with a cylindrical part which is coaxial with that disc and the housing and projects from the latter through a central opening in said adjacent end cover and is sealed relatively thereto; a servomotor connected to the cylindrical part and serving to effect axial movement of the stator disc; and guideway means, including cooperating elements connected; respectively with the stator disc and the housing, for guiding adjacent end cover and to said cylindrical part.
  • each guideway means comprise a sleeve which is parallel with the cylindrical part, and a bolt mounted in the sleeve for reciprocation relatively thereto; and one, element of each guideway means is connected with the stator disc through an arm fixed to the cylindrical part.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Paper (AREA)
  • Crushing And Grinding (AREA)
US00288944A 1971-09-17 1972-09-14 Grinding apparatus for fibrous material Expired - Lifetime US3841573A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712146547 DE2146547C3 (de) 1971-09-17 Scheibenmühle, insbesondere Scheibenrefiner, für die Papierindustrie

Publications (1)

Publication Number Publication Date
US3841573A true US3841573A (en) 1974-10-15

Family

ID=5819876

Family Applications (1)

Application Number Title Priority Date Filing Date
US00288944A Expired - Lifetime US3841573A (en) 1971-09-17 1972-09-14 Grinding apparatus for fibrous material

Country Status (9)

Country Link
US (1) US3841573A (it)
JP (1) JPS5527197B2 (it)
AT (1) AT319728B (it)
BR (1) BR7206437D0 (it)
CA (1) CA971018A (it)
FR (1) FR2152281A5 (it)
GB (1) GB1406816A (it)
IT (1) IT964369B (it)
SE (1) SE393646B (it)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893631A (en) * 1974-07-17 1975-07-08 Sprout Waldron & Co Inc Twin refiner with double floating discs
US3984057A (en) * 1975-01-15 1976-10-05 Milton Pilao Refiner for wood pulp or the like
US4005827A (en) * 1975-04-30 1977-02-01 Beloit Corporation Refiner disk
US4039153A (en) * 1976-04-26 1977-08-02 Hoffman Douglas L Grinding mill
WO2000052255A2 (en) * 1999-03-02 2000-09-08 Groupe Laperriere & Verreault Inc. Tangential discharge disk refiner
US20230047528A1 (en) * 2020-04-01 2023-02-16 Andritz Ag Apparatus for Grinding a Fibrous Material Suspension

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5739878U (it) * 1980-08-20 1982-03-03

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2412680A (en) * 1943-08-03 1946-12-17 Edwin G Eppenbach Metering mill
US2930534A (en) * 1957-02-13 1960-03-29 Black Clawson Co Paper machinery
US2971704A (en) * 1955-11-07 1961-02-14 Asplund Arne J A Grinding apparatus for disintegrating fibrous material
US3212721A (en) * 1961-09-22 1965-10-19 Defibrator Ab Grinding apparatus for treating fibrous material
US3717308A (en) * 1972-03-06 1973-02-20 Reinhall Rolf Grinding apparatus for fibrous material

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4216802Y1 (it) * 1967-04-18 1967-09-28

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2412680A (en) * 1943-08-03 1946-12-17 Edwin G Eppenbach Metering mill
US2971704A (en) * 1955-11-07 1961-02-14 Asplund Arne J A Grinding apparatus for disintegrating fibrous material
US2930534A (en) * 1957-02-13 1960-03-29 Black Clawson Co Paper machinery
US3212721A (en) * 1961-09-22 1965-10-19 Defibrator Ab Grinding apparatus for treating fibrous material
US3717308A (en) * 1972-03-06 1973-02-20 Reinhall Rolf Grinding apparatus for fibrous material

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893631A (en) * 1974-07-17 1975-07-08 Sprout Waldron & Co Inc Twin refiner with double floating discs
US3984057A (en) * 1975-01-15 1976-10-05 Milton Pilao Refiner for wood pulp or the like
US4005827A (en) * 1975-04-30 1977-02-01 Beloit Corporation Refiner disk
US4039153A (en) * 1976-04-26 1977-08-02 Hoffman Douglas L Grinding mill
WO2000052255A2 (en) * 1999-03-02 2000-09-08 Groupe Laperriere & Verreault Inc. Tangential discharge disk refiner
WO2000052255A3 (en) * 1999-03-02 2001-02-01 Groupe Laperriere & Verreault Tangential discharge disk refiner
ES2246597A1 (es) * 1999-03-02 2006-02-16 GL&V MANAGEMENT HUNGARY KFT Refinador de disco de descarga tangencial.
US20230047528A1 (en) * 2020-04-01 2023-02-16 Andritz Ag Apparatus for Grinding a Fibrous Material Suspension

Also Published As

Publication number Publication date
SE393646B (sv) 1977-05-16
JPS5527197B2 (it) 1980-07-18
BR7206437D0 (pt) 1973-07-17
IT964369B (it) 1974-01-21
AT319728B (de) 1975-01-10
FR2152281A5 (it) 1973-04-20
DE2146547B2 (de) 1977-01-20
DE2146547A1 (de) 1973-03-22
CA971018A (en) 1975-07-15
JPS4848705A (it) 1973-07-10
GB1406816A (en) 1975-09-17

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