Roller groups for grinding devices, grinding devices, and methods

Patent metadata

Field	Value
Publication number	US-11925940-B2
Application number	US-202217686544-A
Country	US
Kind code	B2
Filing date	Mar 4, 2022
Priority date	May 28, 2018
Publication date	Mar 12, 2024
Grant date	Mar 12, 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 milling apparatus ( 70 ), comprising a machine stand ( 71 ) and at least one roll assembly ( 10 ) with a first roll ( 11 ) and a second roll ( 12 ) that is or can be inserted in the machine stand ( 71 ),
wherein the roll assembly 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 can be placed onto a horizontal base and moved thereon by means of the at least one roller ( 31 ),
wherein
the machine stand ( 71 ) has at least one rail ( 72 ) on which the at least one roller ( 31 ) of the roll assembly ( 10 ) is movable during mounting and/or demounting of the roll assembly ( 10 ), the roll assembly ( 10 ) has at least one contact surface ( 42 , 76 ) and the machine stand ( 71 ) has at least one counter-contact surface ( 73 ),
wherein the contact surface ( 42 , 76 ) and the counter-contact surface ( 73 ) are tailored to one another and to the at least one rail ( 72 ) in such a way that, in a mounted position of the roll assembly ( 10 ), by virtue of at least one form-fitting engagement between the at least one contact surface ( 42 , 76 ) and the at least one counter-contact surface ( 73 ), the at least one roller ( 31 ) of the roll assembly ( 10 ) does not lie on the rail ( 72 )), and wherein the roll assembly ( 10 ) has a force-measuring device that comprises:
a first sensor ( 24 ) for directly or indirectly determining a first force with which the first bearing body ( 13 ) and the second bearing body ( 14 ) are pretensioned with respect to one another; and
a second sensor ( 25 ) for directly or indirectly determining a second force with acts between the first abutment body ( 17 ) and the second abutment body ( 19 ).

2. The milling apparatus ( 70 ) 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 the first bearing body ( 13 ) and the second bearing body ( 14 ) are adjustable relative to one another in such a way that a milling gap formed between the first roll ( 11 ) and the second roll ( 12 ) is adjustable,
wherein the first bearing body ( 13 ) and the second bearing body ( 14 ) can be 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 towards one another,
wherein
the first bearing body ( 13 ) has at least one first abutment body ( 17 ) with a first abutment surface ( 18 ), and the second bearing body ( 14 ) has at least one second abutment body ( 19 ) with a second abutment surface ( 20 ),
the abutment surfaces ( 18 , 20 ) are formed and are or can be arranged on the bearing bodies ( 13 , 14 ) in such a way that a contact of the abutment surfaces ( 18 , 20 ) counteracts a contact of the rolls ( 11 , 12 ),
the first abutment body ( 17 ) is rotatable about a first axis of rotation (A 1 ), and the first abutment surface ( 18 ) is formed by a circumferential surface ( 18 ) of the first abutment body ( 17 ) that is eccentric with respect to the first axis of rotation (A 1 ), with the result that the rotational position of the first abutment body ( 17 ) determines the minimum width of the milling gap.

3. The milling apparatus ( 70 ) according to claim 2 , wherein the second abutment body ( 19 ) is rotatable about a second axis of rotation (A 2 ) which is parallel to the first axis of rotation (A 1 ), and the second abutment surface ( 20 ) is formed by a circumferential surface ( 20 ) of the second abutment body ( 19 ) that is rotationally symmetrical with respect to the second axis of rotation (A 2 ).

4. The milling apparatus ( 70 ) according to claim 2 ,
wherein the first axis of rotation (A 1 ) of the first abutment body ( 17 ) and/or the second axis of rotation (A 2 ) of the second abutment body ( 19 ) are/is arranged displaceably.

5. The milling apparatus ( 70 ) according to claim 2 , wherein the roll assembly ( 10 ) has a handwheel ( 21 ) which can be rotated about a handwheel axis of rotation (H) and which is coupled via a handwheel gear mechanism ( 22 ) to the first abutment body ( 17 ) in such a way that a rotation of the handwheel ( 21 ) causes a rotation of the first abutment body ( 17 ).

6. The milling apparatus ( 70 ) according to claim 1 , wherein the roll assembly ( 10 ) comprises a handwheel ( 21 ) which is rotatable 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 ) can be set, 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 or can be pretensioned by means of 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 ).

7. The milling apparatus ( 70 ) according to claim 6 , 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 ).

8. The milling apparatus ( 70 ) according to claim 6 , 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.

9. The milling apparatus ( 70 ) according to claim 1 , wherein the machine stand ( 71 ) has a tensioning device ( 16 ), and the roll assembly ( 10 ) has a coupling device ( 66 ) which is intended for releasably coupling the roll assembly ( 10 ) to the tensioning device ( 16 ).

10. The milling apparatus ( 70 ) according to claim 9 , wherein the tensioning device ( 16 ) has a cylinder ( 40 ).

11. The milling apparatus ( 70 ) according to claim 9 , wherein the tensioning device ( 16 ) has at least one pretensioned spring ( 41 ).

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