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Magnetic levitation rotary bearing

A magnetic levitation bearing and rotating axis technology, applied to magnetic bearings, bearings, shafts and bearings, etc., can solve problems such as inability to guarantee low-speed operation

Active Publication Date: 2022-07-22
IRONBOX SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They allow supporting loads, e.g. by using Halbach arrays, but are not guaranteed for low speed operation

Method used

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  • Magnetic levitation rotary bearing
  • Magnetic levitation rotary bearing
  • Magnetic levitation rotary bearing

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Experimental program
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Embodiment Construction

[0015] Typically, passive bearings include:

[0016] A rotating part rotatable about an axis of rotation, and a fixed part or support,

[0017] two elements made of ferromagnetic material - one integral with the rotating part and one with the stationary part - placed close together and separated by an air gap, and

[0018] Magnetic flux generators, such as permanent magnets, are used to generate magnetic flux inside the two elements.

[0019] Typically, the positions of the two elements can be swapped with respect to the stationary part and the rotating part, and the rotating part can carry axial or radial loads.

[0020] "Axial load" refers to an antagonistic force acting on a rotating component parallel or coaxial with the axis of rotation.

[0021] "Radial load" refers to an opposing force acting on a rotating component perpendicular to the axis of rotation.

[0022] A "passive" bearing is one that produces opposing forces without an external energy supply.

[0023] The...

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PUM

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Abstract

A magnetic suspension bearing (10; 30; 40; 50) is described, comprising: a part (22) rotatable about an axis of rotation (X) and a fixed part; two elements (16, 14) made of ferromagnetic material; 42, 44), one element (14; 44) is integral with the rotatable part (22) and the other element (16; 42) is integral with the stationary part. The two elements are closely arranged, separated by an air gap, and axisymmetric about said axis (X). A magnetic flux generator (18) is provided to generate magnetic flux inside the two elements (16, 14; 42, 44). The shape of the two elements (16, 14; 42, 44) is designed such that the magnetic flux flowing inside the two elements forms a torus in space and is in a direction orthogonal to the direction of the load applied to the bearing The direction extends from one element to another through the air gap. This structure ensures high bearing strength of the bearing and at the same time has a simple structure.

Description

technical field [0001] The present invention relates to a slewing bearing / slewing bearing based on passive magnetic levitation, which is used in a rotating coupling and is usually placed between a support and a pin or shaft to reduce friction and wear of materials. Background technique [0002] Traditional rotary bearings are based on sliding friction systems, characterized by direct coupling or interposed rolling elements, usually spheres or rollers, between two sliding surfaces. The use of rolling elements, while ensuring a low level of friction, involves high levels of tension (line or point loads) experienced by the rolling elements themselves, creating problems such as sustained stress. Considering the greater structural complexity and the need to ensure the continued presence of the lubricant, even the improvements obtained with the lubrication system are not sufficient. [0003] In order to reduce friction, solutions using the principle of magnetic levitation have em...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C32/04
CPCF16C32/041
Inventor A·吉罗托L·切萨雷蒂L·A·帕罗塔R·孔蒂尼
Owner IRONBOX SRL