Rotor bearing system

Patent metadata

Field	Value
Publication number	US-12005248-B2
Application number	US-201917054884-A
Country	US
Kind code	B2
Filing date	May 16, 2019
Priority date	May 16, 2018
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

The invention relates to a rotor bearing system ( 1 ). Said system comprises a housing ( 80 ) in which a first permanent magnet ( 30 ) is mounted such that it can rotate about a first axis ( 105 ). A rotor ( 70 ) for conveying a liquid comprises a second hollow-cylindrical permanent magnet ( 40 ), which is mounted such that it can rotate about a second axis. The first permanent magnet ( 30 ) and the second permanent magnet ( 40 ) overlap axially at least partially, wherein the first permanent magnet ( 30 ) is disposed offset relative to the second permanent magnet ( 40 ). In the axial overlap region ( 160 ) of the first permanent magnet ( 30 ) and the second permanent magnet ( 40 ), the housing ( 80 ) is positioned between the two permanent magnets ( 30, 40 ). A first bearing ( 20 ) is configured for the relative axial positioning of the rotor ( 70 ) and the housing ( 80 ) with respect to one another and for receiving an axial force resulting from the arrangement of the first permanent magnet ( 30 ) and the second permanent magnet ( 40 ), and a second bearing ( 10 ) and a third bearing ( 90 ) are configured for receiving radial forces and for positioning the axis of rotation of the second permanent magnet ( 40 ).

First claim

The invention claimed is:

1. A heart support system, comprising:
a rotor bearing system comprising:
a housing, wherein a first permanent magnet is mounted within the housing and configured to rotate about a first axis;

a rotor configured to convey a liquid, wherein the rotor comprises a second permanent magnet, wherein the second permanent magnet comprises a hollow-cylindrical permanent magnet and is configured to rotate about a second axis;
wherein the first permanent magnet and the second permanent magnet at least partially overlap axially,
wherein the first permanent magnet is axially offset relative to the second permanent magnet,
wherein the first permanent magnet and the second permanent magnet are arranged to produce an axial force;
wherein the housing is positioned between the first permanent magnet and the second permanent magnet in an axial overlap region of the first permanent magnet and the second permanent magnet;
a first bearing configured to provide a relative axial positioning of the rotor and the housing with respect to one another and configured to receive the axial force resulting from the arrangement of the first permanent magnet and the second permanent magnet; and
a second bearing, wherein the first bearing and the second bearing are configured to receive radial forces and configured to position the second axis of the second permanent magnet.

2. The heart support system according to claim 1 , wherein the first bearing is disposed between the housing and the rotor and the second bearing is disposed on the rotor.

3. The heart support system according to claim 1 , wherein the first bearing is disposed on the rotor and the second bearing is disposed between the housing and the rotor.

4. The heart support system according to claim 1 , wherein the housing is a motor housing comprising a rotatably mounted shaft within an interior of the motor housing, and wherein the first permanent magnet is disposed on the rotatably mounted shaft.

5. The heart support system according to claim 1 , wherein the first permanent magnet and the second permanent magnet are arranged coaxially.

6. The heart support system according to claim 1 , wherein each of the first permanent magnet and the second permanent magnet comprise at least one pair of poles, wherein the first permanent magnet and the second permanent magnet comprise an equal number of pairs of poles.

7. The heart support system according to claim 1 , wherein the axial force resulting from the arrangement of the first permanent magnet and the second permanent magnet is configured to be greater than a hydraulic force acting on the rotor.

8. The heart support system according to claim 1 , wherein each of the first permanent magnet and the second permanent magnet comprises at least two axial segments.

9. The heart support system according to claim 1 , wherein the first permanent magnet and/or the second permanent magnet comprises a radial, parallel or diametrical magnetization.

10. The heart support system according to claim 1 , wherein the first permanent magnet and/or the second permanent magnet comprises a Halbach array.

11. A heart support system, comprising:
a rotor bearing system comprising:
a housing, wherein a first permanent magnet is mounted within the housing and configured to rotate about a first axis;
a rotor configured to convey a liquid, wherein the rotor comprises a second permanent magnet, wherein the second permanent magnet is a hollow-cylindrical permanent magnet and is configured to rotate about a second axis;
wherein the first permanent magnet and the second permanent magnet at least partially overlap axially,
wherein the first permanent magnet is axially offset relative to the second permanent magnet,
wherein the first permanent magnet and the second permanent magnet are arranged to produce an axial force;
wherein the housing is positioned between the two permanent magnets in an axial overlap region of the first permanent magnet and the second permanent magnet;
a first bearing configured to provide a relative axial positioning of the rotor and the housing with respect to one another and configured to receive the axial force resulting from the arrangement of the first permanent magnet and the second permanent magnet; and
a second bearing and a third bearing, wherein the second bearing and the third bearing are configured to receive radial forces and configured to position the second axis of the second permanent magnet.

12. The heart support system according to claim 11 , wherein the first bearing and the third bearing are disposed between the housing and the rotor and the second bearing is disposed on the rotor.

13. The heart support system according to claim 11 , wherein the first bearing and the third bearing are disposed on the rotor and the second bearing is disposed between the housing and the rotor.

14. The heart support system according to claim 11 , wherein the housing is a motor housing comprising a rotatably mounted shaft within an interior of the motor housing, and wherein the first permanent magnet is disposed on the rotatably mounted shaft.

15. The heart support system according to claim 11 , wherein the first permanent magnet and the second permanent magnet are arranged coaxially.

16. The heart support system according to claim 11 , wherein each of the first permanent magnet and the second permanent magnet comprise at least one pair of poles, wherein the first permanent magnet and the second permanent magnet comprise an equal number of pairs of poles.

17. The heart support system according to claim 11 , wherein the axial force resulting from the arrangement of the first permanent magnet and the second permanent magnet is configured to be greater than a hydraulic force acting on the rotor.

18. The heart support system according to claim 11 , wherein each of the first permanent magnet and the second permanent magnet comprises at least two axial segments.

19. The heart support system according to claim 11 , wherein the first permanent magnet and/or the second permanent magnet comprises a radial, parallel or diametrical magnetization.

20. The heart support system according to claim 11 , wherein the first permanent magnet and/or the second permanent magnet comprises a Halbach array.

Assignees

• Kardion Gmbh

Inventors

• Vogt Andreas
• Stotz Ingo
• Bette Johannes
• Schuelke Armin
• Li Xiang
• Vollmer Uwe
• Minzenmay David

Classifications

• A61M60/178

  drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular assist devices · CPC title

• A61M60/216

  including a rotating member acting on the blood, e.g. impeller · CPC title

• A61M60/825

  Contact bearings, e.g. ball-and-cup or pivot bearings · CPC title

• A61M60/824

  Hydrodynamic or fluid film bearings · CPC title

• H02K16/005

  Machines with only rotors, e.g. counter-rotating rotors (DC commutator machines or universal AC/DC commutator motors having a rotating armature and a rotating excitation field H02K23/60) · CPC title