Roller groups for grinding devices, grinding devices, and methods

Patent metadata

Field	Value
Publication number	US-11998928-B2
Application number	US-202217686541-A
Country	US
Kind code	B2
Filing date	Mar 4, 2022
Priority date	May 28, 2018
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

Roller packages (IO) for grinding devices ( 70 ), comprising a first roll ( 11 ), which is maintained by at least one first bearing body ( 13 ), and a second roll ( 12 ), which is maintained by at least one second bearing body ( 14 ). The first bearing body ( 13 ) and the second bearing body ( 14 ) are prestressed against each other and comprise stop elements ( 17,19 ) with stop surfaces ( 18, 20 ), the contact of which counteracts a contact of the rolls ( 11, 12 ). The rotational position of the first stop element ( 17 ) determines the minimum width of the grinding gap. Also disclosed are grinding devices ( 70 ), methods for operating a roll assembly ( 10 ) and methods for determining the radial force acting between the rolls ( 11, 12 ) of a roll assembly ( 10 ).

First claim

The invention claimed is:

1. A roll assembly ( 10 ) for a milling apparatus ( 70 ), comprising a first roll ( 11 ) and a second roll ( 12 ), as well as a handwheel ( 21 ) which can be rotated about a handwheel axis of rotation (H) and by means of which a milling gap formed between the first roll ( 11 ) and the second roll ( 12 ) is adjustable, wherein
the roll assembly ( 10 ) has a position indicator ( 26 ) for indicating a position of the handwheel ( 21 ), and the position indicator ( 26 ) comprises a position indicator housing ( 27 ) and an indicator element ( 28 ) which is movable along the handwheel axis of rotation (H) relative to the position indicator housing ( 27 ) and which is pretensioned by a position indicator spring ( 29 ) in the direction of the handwheel axis of rotation (H) with respect to the position indicator housing ( 27 ) in such a way that it can be rotated about the handwheel axis of rotation (H) only upon overcoming the pretensioning brought about by the position indicator spring ( 29 ).

2. The roll assembly ( 10 ) according to claim 1 , wherein the roll assembly ( 10 ) has an integrated rolling device ( 30 ) having at least one roller ( 31 ) which is or can be arranged on the roll assembly ( 10 ) in such a way that the roll assembly ( 10 ) can be placed onto a horizontal base and moved thereon by means of the at least one roller ( 31 ).

3. The roll assembly ( 10 ) according to claim 1 , wherein the first roll ( 11 ) is held by at least one first bearing body ( 13 ), and the second roll ( 12 ) is held by at least one second bearing body ( 14 ), wherein at least one of the bearing bodies ( 13 , 14 ) has a rolling bearing ( 58 ) which supports a roll stub ( 33 ) of one of the rolls ( 11 , 12 ), wherein a bearing cover ( 63 ) of the rolling bearing ( 58 ) has on its inner side ( 34 ) a guide channel ( 35 ) for lubricant that extends around the roll stub ( 33 ) and is connected to an outlet opening ( 36 ) through which lubricant can exit the guide channel ( 35 ).

4. The roll assembly ( 10 ) according to claim 1 , wherein the first roll ( 11 ) is held by two first bearing bodies ( 13 ), the second roll ( 12 ) is held by two second bearing bodies ( 14 ), and the first bearing bodies ( 13 ) are adjustable independently of one another and/or the second bearing bodies ( 14 ) are adjustable independently of one another.

5. A milling apparatus ( 70 ), in particular a mill roll frame ( 70 ), comprising a machine stand ( 71 ) and at least one roll assembly ( 10 ) according to claim 1 that is or can be inserted in the machine stand ( 71 ).

6. The milling apparatus ( 70 ) according to claim 5 , wherein the machine stand ( 71 ) has a tensioning device ( 16 ), and the roll assembly ( 10 ) has a coupling device ( 66 ) which is arranged in particular on the second bearing body ( 14 ) and intended for releasably coupling the roll assembly ( 10 ) to the tensioning device ( 16 ).

7. The milling apparatus ( 70 ) according to claim 6 , wherein the tensioning device ( 16 ) has a cylinder ( 40 ), in particular a bellows cylinder ( 40 ).

8. The milling apparatus ( 70 ) according to claim 6 , wherein the tensioning device ( 16 ) has at least one pretensioned spring ( 41 ) which is in particular connected in series with the cylinder ( 40 ).

9. A method for operating a roll assembly ( 10 ) according to claim 3 , comprising a step or pretensioning in which the first bearing body ( 13 ) and the second bearing body ( 14 ) are pretensioned with respect to one another by means of a tensioning device ( 16 ) in such a way that the first roll ( 11 ) and the second roll ( 12 ) are pressed toward one another.

10. The method according to claim 9 , wherein the method comprises a further step of turning in which the handwheel ( 21 ) is turned, preferably around a handwheel axis of rotation (H), and thereby rotating a first abutment body ( 17 ), which is coupled via a handwheel gear mechanism ( 22 ) to the handwheel ( 21 ), is rotated about a first axis of rotation (A 1 ) in order to set a minimum width of the milling gap.

Assignees

• Buehler Ag

Inventors

• Holenstein Philippe
• Studerus Lukas
• Rickenbach Daniel
• Mark Daniel
• Weber Heribert

Classifications

• B02C4/06 Primary

  specially adapted for milling grain · CPC title

• B02C4/38

  in grain mills · CPC title

• B02C4/32 Primary

  Adjusting, applying pressure to, or controlling the distance between, milling members · CPC title

• B02C4/02

  with two or more rollers · CPC title

• B02C4/28

  Details · CPC title