Granted Patent B2

US 11,084,007 · App. 15/527,099 · Granted Aug 10, 2021

Inventor: Thorsten Adams (Goettingen, DE)

B01F13/0845B01F13/0836B01F13/0872H02K5/128H02K5/1282H02K7/14

Abstract

Claims (27)

1. A mixing system, comprising:

a mixing device ( 1 ), comprising:

a container ( 3 ) with an inner space ( 5 ) for accommodating fluids and/or solids;

a rotatable stirring element ( 100 ) for mixing the fluids and/or solids, the rotatable stirring element ( 100 ) having a base body ( 102 ) and blade elements ( 104 ) arranged on the base body ( 102 ) and radially around a stirring element rotation axis (RR) extending perpendicularly from the base body ( 102 ), the blade elements ( 104 ) being configured to mix the fluids and/or solids in the container ( 3 ) by rotation of the stirring element ( 100 ), and the base body ( 102 ) and the blade elements ( 104 ) being made of plastic as a single piece;

a bearing element for mounting the stirring element ( 100 ), the bearing element ( 104 ) comprising a stationary bearing rod ( 108 ) and multiple bearing rod ball bearings ( 134 ) arranged at different heights with respect to the stirring element rotation axis (RR) for mounting the rotating elements of the stirring element ( 100 ) around the stationary bearing rod ( 108 ), such that at least a first of the bearing rod ball bearings ( 134 ) is arranged between the stationary bearing rod ( 108 ) and the blade elements ( 104 ), and at least a second of the bearing rod ball bearings ( 134 ) is arranged between the bearing rod ( 108 ) and the base body ( 102 ) of the stirring element ( 100 );

wherein the stirring element ( 100 ) comprises non-permanently magnetized elements ( 118 ) arranged within the base body ( 102 ) or embedded in at least one pair of pole protrusions ( 114 ), so that the stirring element can be set in rotation by reluctance forces induced from outside; and

a drive device ( 200 ) for driving the stirring element ( 100 ) in the mixing device ( 1 ), the drive device ( 200 ) comprising:

a stator housing ( 202 ) on which the mixing device ( 1 ) with fluids or solids to be mixed can be attached;

at least two pairs of coils ( 208 ) through which current can flow and that are arranged in pairs on opposite sides with respect to a stator housing axis (SR); and

a control device designed so that current flows successively through the pairs of coils ( 208 ), so that the stirring element ( 100 ) of the mixing device ( 1 ) can be driven by reluctance forces induced in the stirring element ( 100 ), wherein:

the number of pairs of coils ( 208 ) in the drive device ( 200 ) is greater than the number of pairs of pole protrusions ( 114 ), and

the rotatable stirring element ( 100 ), the bearing rod ( 108 ) and the base body ( 102 ) of the stirring element ( 100 ) are positioned inside the inner space ( 5 ) of the container ( 3 ).

2. The mixing system of claim 1 , wherein the bearing rod ( 108 ) is inserted at least partially into the stirring element ( 100 ) to work as pivot bearing.

3. The mixing system of claim 1 , wherein a lateral surface ( 116 ) of the base body ( 102 ) comprises at least one pair of pole protrusions ( 114 ), the pole protrusions ( 114 ) in the at least one pair of pole protrusions ( 114 ) being arranged on opposite sides of the base body ( 102 ).

4. The mixing system of claim 1 wherein the container ( 3 ) has at least one cylindrical wall recess ( 122 ), in which the base body ( 102 ) of the stirring element ( 100 ) is at least partially inserted.

5. The mixing system of claim 4 , wherein at least one wall surface area of the container ( 3 ), in which the wall recess ( 122 ) is arranged, is rigid.

6. The mixing system of claim 1 , wherein the coils ( 208 ) have coil axes that intersect the stator housing axis (SR) substantially perpendicularly.

7. The mixing system of claim 1 , wherein the stator housing ( 202 ) has a stator recess ( 204 ), into which the stirring element ( 100 ) of the mixing device ( 1 ) can be inserted,

wherein the coils ( 208 ) are arranged at least partially in a recess wall ( 206 ) that limits the stator recess ( 204 ) in lateral direction along the stator housing axis (SR).

8. The mixing system of claim 1

wherein a stirring element rotation axis (RR) and the stator housing axis (SR) are identical.

9. The mixing system of claim 8 , wherein the coils ( 208 ) in the drive device ( 200 ) and the non-permanently magnetized elements ( 118 ) arranged within the base body ( 102 ) are arranged in a common plane perpendicular to the stirring element rotation axis (RR) and the stator housing axis (SR).

10. The mixing system of claim 1 , wherein the first of the bearing rod ball bearings ( 134 ) is arranged at a first axial position that is aligned axially with an axial position where the blade elements ( 104 ) extend perpendicularly from the base body ( 102 ), and the second of the bearing rod ball bearings ( 134 ) is arranged at a second axial position that is spaced axially from axial positions where the blade elements ( 104 ) extend perpendicularly from the base body ( 102 ).

11. A method for driving the stirring element ( 100 ) in the mixing system of claim 1 , the method comprising:

mounting the stirring element ( 100 ) rotatably in the bearing element;

attaching the mixing device ( 1 ) onto the drive device ( 200 ); and

causing current to flow sequentially through the pairs of coils ( 208 ), and thereby generating reluctance forces that act on the stirring element ( 100 ) and set it in rotation.

Assignments (1)

Priority Claims (1)

Continuity (1)

Cited By (10)

US 1,091,308 US 1,092,208 US 12,213,617 US 12,377,392 US 12,410,048 US 12,533,643 US 12,539,500 US 12,557,934 US 12,616,945 US 12,691,425