Device For Magnetically Supporting A Shaft

Patent metadata

Field	Value
Publication number	US-2017284463-A1
Application number	US-201515507493-A
Country	US
Kind code	A1
Filing date	Aug 18, 2015
Priority date	Sep 4, 2014
Publication date	Oct 5, 2017
Grant date	—

Abstract

A device for supporting a shaft may include a magnetic yoke that surrounds the shaft and has the shape of a U-section, and at least one first element for creating a magnetic circuit that can be formed from the magnetic yoke to the shaft. The shaft may be eccentrically supported in the surrounding magnetic yoke in such a way that a first vertical upper distance between the shaft and the magnetic yoke is smaller a second vertical lower distance between the shaft and the magnetic yoke.

First claim

What is claimed is:

1 . A device for supporting a shaft, the device comprising:
a magnet yoke surrounding the shaft and having a U-profile, wherein an opening of the U-profile faces toward the shaft, and at least one first element configured to generate a magnetic circuit from the magnet yoke to the shaft, wherein the shaft is mounted eccentrically in the surrounding magnet yoke such that a first vertical upper spacing between the shaft and the magnet yoke is smaller than a second vertical lower spacing between the shaft and the magnet yoke.

2 . The device of claim 1 , wherein the at least one first element comprises a ring-shape coil arranged within the opening of the U-profile of the magnet yoke around the shaft.

3 . The device of claim 1 , wherein the at least one first element comprises first and second permanent magnets that attach to first and second radially arranged limbs, respectively, of the U-profile of the magnet yoke.

4 . The device of claim 3 , wherein a poling of the first permanent magnet at the first limb are opposed to a poling of the second permanent magnet at the second limb.

5 . The device of claim 1 , comprising a second element configured to displace the magnet yoke relative to the shaft.

6 . The device of claim 5 , wherein the second element is firmly attached to the magnet yoke.

7 . The device of claim 1 , wherein the first vertical upper spacing and the second vertical lower spacing are filled with a fluid.

8 . The device of claim 7 , wherein the first vertical upper spacing and the second vertical lower spacing are filled with air.

9 . The device of claim 1 , comprising a control unit configured to regulate the magnetic circuit, and adjust the first vertical upper spacing and the second vertical lower spacing.

10 . An assembly, comprising:
a shaft, a magnet yoke surrounding the shaft and having a U-profile, wherein an opening of the U-profile faces toward the shaft, and at least one first element configured to generate a magnetic circuit from the magnet yoke to the shaft, wherein the shaft is mounted eccentrically in the surrounding magnet yoke such that a first vertical upper spacing between the shaft and the magnet yoke is smaller than a second vertical lower spacing between the shaft and the magnet yoke.

11 . The assembly of claim 10 , wherein the at least one first element comprises a ring-shape coil arranged within the opening of the U-profile of the magnet yoke around the shaft.

12 . The device of claim 10 , wherein the at least one first element comprises first and second permanent magnets that attach to first and second radially arranged limbs, respectively, of the U-profile of the magnet yoke.

13 . The device of claim 12 , wherein a poling of the first permanent magnet at the first limb are opposed to a poling of the second permanent magnet at the second limb.

14 . The device of claim 10 , comprising a second element configured to displace the magnet yoke relative to the shaft.

15 . The device of claim 14 , wherein the second element is firmly attached to the magnet yoke.

16 . The device of claim 10 , wherein the first vertical upper spacing and the second vertical lower spacing are filled with a fluid.

17 . The device of claim 16 , wherein the first vertical upper spacing and the second vertical lower spacing are filled with air.

18 . The device of claim 10 , comprising a control unit configured to regulate the magnetic circuit, and adjust the first vertical upper spacing and the second vertical lower spacing.

Assignees

• Siemens Ag

Inventors

• Diehl Dirk
• Goraj Robert

Classifications

• F16C32/0474

  for rotary movement · CPC title

• F16C32/0444

  Details of devices to control the actuation of the electromagnets · CPC title

• F16C32/0461 Primary

  of stationary parts of the magnetic circuit · CPC title

• F16C32/0465

  with permanent magnets provided in the magnetic circuit of the electromagnets · CPC title

• F16C39/06

  using magnetic means · CPC title