Magnetic radial bearing having single sheets in the tangential direction

Patent metadata

Field	Value
Publication number	US-9568046-B2
Application number	US-201214364586-A
Country	US
Kind code	B2
Filing date	Nov 19, 2012
Priority date	Dec 12, 2011
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

The invention relates to an easily mountable and highly dynamic radial bearing. According to the invention, a magnetic radial bearing for the rotatable mounting of a rotor ( 3 ) is provided, having a stator ( 2 ) that comprises several coil assemblies ( 6 ). The coil assemblies ( 6 ) are arranged around an axis ( 1 ) of the radial bearing in a circumferential direction. Each of the coil assemblies ( 6 ) has a laminated core ( 7 ) having single sheets. Each of the coil assemblies ( 6 ) further has an axial field coil ( 11 ) that is wound around the corresponding laminated core ( 7 ). The single sheets are stacked in the tangential direction in every laminated core ( 7 ).

First claim

The invention claimed is:

1. A magnetic radial bearing for rotatably supporting a rotor, said magnetic bearing comprising a stator having several coil assemblies which are arranged about an axis of the radial bearing in a circumferential direction, each of the coil assemblies including a laminated core with single sheets and a coil which is wound about the laminated core and configured as an axial field coil, said single sheets of the laminated core being stacked in the circumferential direction, and each of the coil assemblies and also each of the laminated cores and each of the coils provided in each of the coil assemblies have a kidney-shaped form with radially outwardly curved radially inner and radially outer surfaces, so that each of the kidney-shaped coils is wound about each of the kidney-shaped laminated cores in each of the coil assemblies, an annular housing in which the coil assemblies are secured, and a separate supporting ring attached to an inner circumference of the annular housing and configured to radially support the coil assemblies from inside, and the supporting ring is provided with radial projecting vanes which hold it in position relative to the housing by a positive connection with the housing and insulate the coil assemblies from each other by location of one of the vanes between two of the coil assemblies.

2. The magnetic radial bearing of claim 1 , wherein the stator has four of said coil assemblies facing each other in pairs.

3. The magnetic radial bearing of claim 1 , wherein the laminated core has in an axially extending cutting plane a U-shaped cross section having two sides and a section connecting the sides and having portions extending outwardly beyond the sides, said coil being wound about a part of the laminated core in a direction perpendicular to the axis of the radial bearing, said part being assigned to the section.

4. The magnetic radial bearing of claim 1 , wherein the laminated core has an arched configuration in the circumferential direction.

5. The magnetic radial bearing of claim 1 , wherein each of the coil assemblies comprises a coil carrier arranged around the laminated core.

6. The magnetic radial bearing of claim 5 , wherein the coil carrier is separable.

7. The magnetic radial bearing of claim 5 , wherein the coil carrier is sprayed onto the laminated core.

8. The magnetic radial bearing of claim 1 , wherein the housing is made of two parts, each of the two parts of the housing having an annular shape, and the two parts are configured as identical and cup-shaped parts.

9. The magnetic radial bearing of claim 1 , wherein in each of the coil assemblies and also in each of the laminated cores and in each of the coils provided in each of the coil assemblies having a kidney-shaped form the radially outwardly curved radially inner and radially outer surfaces are connected with one another by rounded convex transitions.

Assignees

• Siemens Ag

Inventors

• Bott Erich
• Vollmer Rolf

Classifications

• F16C32/0408

  Passive magnetic bearings · CPC title

• H02K3/524

  for U-shaped, E-shaped or similarly shaped cores · CPC title

• H02K7/09

  with magnetic bearings · CPC title

• H02K3/525

  Annular coils, e.g. for cores of the claw-pole type · CPC title

• F16C32/0412

  for radial load mainly · CPC title