Device and method for comminuting bulk material grains

Patent metadata

Field	Value
Publication number	US-11213828-B2
Application number	US-201816759936-A
Country	US
Kind code	B2
Filing date	Oct 29, 2018
Priority date	Oct 30, 2017
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

A device for comminuting bulk material grains (K) having a first element, designed as a rotor having a cylindrical circumferential surface with a first surface ( 31 ) and a first receiving portion ( 41 ), and a second element designed as a shear strip ( 51 ) having a second surface ( 61 ) and a second receiving portion ( 71 ), and a supply unit. The first and the second surfaces ( 31, 61 ) lie parallel to and face one another. The first and second elements are relatively movable between first and second positions (P 1 , P 2 ) in a plane of the first and the second surfaces ( 31, 61 ). In the first position (P 1 ), the first and second receiving portion ( 41, 71 ) communicate with one another, via a passage ( 9 ) forming a receptacle, in which the bulk material grain (K) can be positioned, and, upon moving to the second position (P 2 ), a cross section of the passage ( 9 ) is narrowed.

First claim

The invention claimed is:

1. A device for comminuting bulk material grains, comprising:
a first element having a first surface and a first receiving section,
a second element with a second surface and a second receiving section,
a feeding device,
wherein the first surface and the second surface are arranged parallel and facing each other,
the first element and the second element are movable back and forth, relative to one another, between a first position and a second position, and the direction of movement being in a plane defined by the first and second surfaces,
in the first position, the first receiving section and the second receiving section communicate with each other, via a passage, and form a receiving area in which a grain of bulk material can be positioned via the feed device,
when the first element and the second element are moved from the first position to the second position, a cross-section of the passage is narrowed,
wherein the first element is formed as a rotor rotatably mounted about a rotor axis and having a cylindrical circumferential surface, the first receiving section is an at least partiallyformed circumferential groove, and the rotor has at least one axial groove crossing the circumferential groove, and the first surface is a side wall of the axial groove, and
the second element is designed as a shear bar and is arranged in the axial groove so as to be movable back and forth along the axial groove, and the second receiving section being a recess of the shear bar; and
wherein the shear bar is movable by means of a cam gear from the first position into the second position and/or from the second position into the first position, the cam a direction of rotation of the rotor at an axial end of the rotor, upon rotation of the rotor the control cam moves an axial end of the shear bar axially, the device further comprising at least one punch axially guided in a guide bore of the rotor, the punch being connected to at least one shear bar and being moved axially by the control cam upon rotation of the rotor.

2. The device according to claim 1 , further comprising a housing with a housing wall which coaxially surrounds the rotor at least in sections and has at least one feed opening and at least one outlet opening for the bulk material grains.

3. The device according to claim 2 , wherein the housing wall has at least one movable housing wall section which radially overlaps the first receiving section with respect to the rotor axis.

4. The device according to claim 3 , wherein the at least one movable housing wall portion cooperates with a movement sensor for detecting a movement of the movable housing wall portion.

5. The device according to claim 1 , wherein the rotor axis is arranged vertically.

6. The device according to claim 1 , wherein the circumferential groove is a groove extending circumferentially.

7. The device according to claim 1 , wherein the axial groove extends over the entire height of the rotor.

8. The device according to claim 1 , wherein the circumferential groove and the recess have a trapezoidal profile in a radial section through the rotor.

9. The device according to claim 8 , wherein the circumferential groove and the recess have the profile of an isosceles trapezoid, the shorter base area of the trapezoid being arranged parallel to the rotor axis.

10. The device according to claim 1 , wherein the rotor has a plurality of circumferential grooves.

11. The device according to claim 10 , wherein the shear bar comprises a plurality of recesses, and in the first position each recess is associated with a circumferential groove.

12. The device according to claim 11 , wherein a recess associated with a first circumferential groove in the first position is associated with a second circumferential groove in the second position.

13. The device according to claim 1 , wherein the rotor comprises a plurality of shear bars, each of which is arranged in an axial groove.

14. A method for processing bulk grains, comprising the following steps:
comminuting of bulk material grains with a device according to claim 1 ;
further processing of the comminuted bulk material grains or storage of the comminuted bulk material grains;
wherein no separation step is carried out between the comminution step and the further processing/storage step and in particular in that no feeding back of the comminuted bulk material grains to a device for comminuting bulk material takes place.

Assignees

• Buehler Ag

Inventors

• Künzle Simon
• Rickenbach Daniel

Classifications

• B02C4/18

  in the form of a bar · CPC title

• B02C4/24

  specially adapted for milling grain · CPC title

• B02C4/16

  specially adapted for milling grain · CPC title

• B02C9/02 Primary

  Cutting or splitting grain · CPC title

• B02C4/12

  in the form of a plate · CPC title