Series electromagnetic-elastic foil combined bearing
An elastic foil, electromagnetic bearing technology, applied in magnetic bearings, rotating bearings, bearings and other directions, can solve the problems of low bearing capacity, rotor floating, large wear, etc. Ease of processing
Inactive Publication Date: 2012-01-11
XI AN JIAOTONG UNIV
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Problems solved by technology
However, the foil bearing has low bearing capacity under the low-speed conditions of starting and stopping, and cannot completely float the rotor, causing friction between the journal and the top layer of foil, and greater wear and tear
Method used
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[0022] The structural principle and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0023] The invention mainly aims at the basic requirements of not increasing the axial length of the bearing and not increasing the air gap between the electromagnetic bearing and the rotor journal, and designs the structure for installing the elastic foil bearing.
[0024] refer to figure 1 , an overall structure of an electromagnetic-elastic foil hybrid bearing arranged in series, including a bearing seat 17, an electromagnetic bearing 1 is arranged in the bearing seat 17, a magnetic pole 6 is arranged on the electromagnetic bearing 1, and a coil 7 is wound on the magnetic pole 6, and the electromagnetic bearing 1 A left end cover 2 and a right end cover 3 for pressing the magnetic pole 6 are arranged in the axial direction, and two elastic foil bearings 5 are nested between the left end cover 2 and the ri...
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The invention discloses a series electromagnetic-elastic foil combined bearing integrated structure, which comprises a bearing base 17, wherein an electromagnetic bearing 1 is arranged in the bearing base 17; the electromagnetic bearing 1 is provided with a magnetic pole 6; the electromagnetic pole 6 is wound with a coil 7; the electromagnetic bearing 1 is axially provided with a left end cap 2 and a right end cap 3 which tightly press the electromagnetic pole 6; the left end cap 2 and the right end cap 3 are provided with grooves 12 along the circumferential direction; and a top elastic foil13 and a bottom elastic foil 14 are arranged in the grooves 12. A rotor is suspended by the electromagnetic bearing 1, a lubricating gas film is arranged for supporting the rotor on the surfaces of the elastic foil 5 and a rotor shaft neck 4 when the rotor is accelerated to reach a takeoff speed, and when the electromagnetic bearing is in an idle state, the rotor can be independently supported bythe elastic foil bearing 5. The series electromagnetic-elastic foil combined bearing structure has the characteristics of low power consumption, large bearing force, high precision and high stability.
Description
technical field [0001] The invention relates to a bearing, in particular to an electromagnetic-elastic foil hybrid bearing arranged in series. Background technique [0002] Electromagnetic bearing is a high-performance bearing that uses magnetic force to suspend the rotor, so that the rotor and stator can be supported without mechanical friction. At present, the most common one is active magnetic bearing (Active Magnetic Bearing, referred to as AMB). The active magnetic bearing does not require lubrication and sealing, completely eliminates wear, and is controllable. It can actively control the rotor position, and the bearing stiffness and damping are adjustable, and the dynamic performance is very good; , the carrying capacity of the electromagnetic bearing cannot be further improved, and with the increase of the rotational speed, the time lag phenomenon of the system is relatively serious, which may easily lead to instability. [0003] The elastic foil bearing is a fluid...
Claims
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IPC IPC(8): F16C32/00
CPCF16C17/024F16C32/0402F16C32/048
Inventor 孙岩桦田野徐益飞虞烈
Owner XI AN JIAOTONG UNIV