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Bearing assembly for machine table with magnetic load relieving mechanism

A bearing device, the technology of magnetic bearings, applied in the direction of bearings, bearings, shafts and bearings of rotary motion

Inactive Publication Date: 2013-09-18
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this embodiment of the permanent magnets is that, when the rotor moves relative to the stator, a magnetic detent moment inevitably occurs due to the gap between the permanent magnets.

Method used

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  • Bearing assembly for machine table with magnetic load relieving mechanism
  • Bearing assembly for machine table with magnetic load relieving mechanism
  • Bearing assembly for machine table with magnetic load relieving mechanism

Examples

Experimental program
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Effect test

Embodiment Construction

[0024] figure 1 a) A cross-sectional view showing a first embodiment of a bearing device for a machine table having a stator 01 and a rotor 03 movably supported relative to the stator. Support is achieved by the rolling bearing 05 and the magnetic bearing 07 that unloads the rolling bearing 05 by magnetic repulsive force. The two-component bearing is configured as a rotary bearing, in which a double row angular contact ball bearing is provided as the rolling bearing 05. As an alternative, it is preferable to consider a cylindrical ball bearing or a radial / axial-roller-cylindrical bearing.

[0025] The rotor 03 is movably supported with respect to the stator 01 via a rolling bearing 05. The magnetic bearing 07 is arranged radially outside the rolling bearing 05, and has a stator permanent magnet group fixed on the stator and an opposite rotor permanent magnet group fixed on the rotor. The stator permanent magnet group and the rotor permanent magnet group pass through the air gap ...

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Abstract

The bearing arrangement has a stator (01) and a runner (03) relatively supported to the stator. The runner has a roller bearing (05) and a magnet bearing (07) forcing the roller bearing by magnetic repulsive force. The field strength equalizing units are provided, which adjust the magnetic field strength fluctuations arising between the opposite groups of permanent magnets with moved runner.

Description

Technical field [0001] The invention relates to a bearing device for a machine table according to the preamble of claim 1. Background technique [0002] The machine table according to the present invention has a stator and a rotor movably supported relative to the stator. The bearing device includes a rolling bearing and a magnetic bearing that unloads the rolling bearing by a magnetic repulsive force. The magnetic bearing has at least one stator permanent magnet group arranged on the stator and at least one opposite rotor permanent magnet group arranged on the rotor. The two opposite permanent magnet groups are separated by an air gap and have the same magnetic poles on the sides facing each other. [0003] Such a bearing device is in particular configured as a truncated cone bearing with an integrated magnetic unloading mechanism. Other possible fields of use are passive magnetic bearings with support seats or emergency-running bearings and truncated cone bearings that compensa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C32/04F16C39/06
CPCB23Q2220/004F16C19/184F16C39/066F16C2322/00F16C2322/39
Inventor 金特·施密特赖纳·帕次瓦尔德
Owner SCHAEFFLER TECH AG & CO KG