Magnetic bearing and method for operation thereof
A magnetic bearing and bearing body technology, applied in bearings, shafts, bearings, bearing cooling, etc., can solve the problems of impossible clearance adjustment, uneven loading of magnetic bearings, and hindrance to accurate clearance adjustment, etc.
Inactive Publication Date: 2013-06-19
THYSSENKRUPP TRANSRAPID +1
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, due to a one-sided pressure increase, for example in machine tools, in wind power plants due to fluctuations in the wind intensity or in scanners due to changes in the state of equilibrium due to tilted positions, weight offsets, etc., the magnetic bearings are loaded unevenly, In this case, then, due to the rule that the support gaps facing each other should remain of the same size, it follows that the magnet structures facing each other must be operated with different currents in order to comply with the above rule
This results in correspondingly different local temperature fluctuations in the winding due to electrical power losses, in particular in magnetic bearings with large dimensions, which lead to different thermal expansions of the bearing body or magnet structure and thus strongly impedes precise clearance adjustment, or even makes such clearance adjustment impossible
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0029] figure 1 A magnetic bearing is schematically shown with a first bearing body 1 , which is designed as an inner ring and a rotor, and is rotatable along the double arrow θ, and a second bearing body 2 , which is designed as an outer ring and a stationary part. The bearing body 2 is provided in this embodiment with four magnet structures 3o, 3u, 4l and 4r, where the letters "o", "u", "l" and "r" respectively denote "upper" as used in this application , "down", "left" and "right". The magnet structures 3 o , 3 u on the one hand and the magnet structures 4 l and 4 r on the other hand are respectively arranged on opposite sides of the bearing body 1 , so that they form two pairs of magnet structures diametrically opposite each other. In addition, if figure 1 As shown schematically only for the magnet structure 3 o , each magnet structure 3 and 4 has a winding 6 wound on a core 5 . The pole faces 7 of the individual cores 5 are associated with the circumferential or radi...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a magnetic bearing and to a method for operation thereof. The magnetic bearing contains a ferromagnetic, movably mounted bearing element (1) and at least two magnetic devices (3o, 3u) arranged on opposing sides of the bearing element (1) and equipped with windings (6), wherein during operation of the magnetic bearing, electric currents are conducted through the windings (6) and these currents are regulated such that in an equilibrium state between the bearing element (1) and the two magnetic devices (3o, 3u), bearing gaps (10o, 10u) of predetermined size (So, Su) form. According to the invention, the temperatures produced in the magnetic devices (3o, 3u) during operation are measured and the regulation of the currents takes place such that in the equilibrium state, regardless of the load situation, the same temperatures appear in the magnetic devices (3o, 3u) or in the windings (6) thereof (FIG. 1).
Description
technical field [0001] The invention relates to a method for operating a magnetic bearing and to a magnetic bearing. Background technique [0002] Magnetic bearings of the aforementioned type, which can be configured as radial bearings or axial bearings, and their method of operation are known in numerous variants (for example "Magnetlager, Prinzip und Berechnungsgrundlagen" by Roland Steffen, 2004, http: / / www.rolandsteffen.de ). [0003] Radial bearings of this type are mainly used for contact-free radial support of rotating bodies by means of a bearing body in the form of a circular bearing ring mounted on the radial bearing. These bearings are characterized in that they work without wear and do not require lubricants. Preferred fields of application are therefore vacuum technology and medical technology. Magnetically mounted heart pumps for cardiac surgery are known, for example. In addition, however, such magnetic bearings can also be used, for example, in machine to...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F16C32/04
CPCF16C32/0442F16C32/0444F16C37/005F16C32/0451
Inventor 郑清华L·米勒
Owner THYSSENKRUPP TRANSRAPID