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Pre-tightening electromagnetic-elastic foil gas combination bearing

A technology of elastic foils and electromagnetic bearings, applied in the direction of bearings, shafts, bearings, mechanical equipment, etc., can solve the problems of large wear, low damping and stiffness, and low bearing capacity, and achieve improved bearing capacity, high dynamic stiffness, and improved The effect of damping and degree of stability

Inactive Publication Date: 2009-04-08
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the elastic foil bearing uses gas as the lubricating medium, the load-carrying capacity is relatively low, and the damping and stiffness are also relatively low; in addition, during the starting and stopping stages, due to the friction between the journal and the foil, the wear is relatively large

Method used

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  • Pre-tightening electromagnetic-elastic foil gas combination bearing
  • Pre-tightening electromagnetic-elastic foil gas combination bearing
  • Pre-tightening electromagnetic-elastic foil gas combination bearing

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Embodiment Construction

[0028] The structural principle and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] see figure 1 , figure 2 , image 3 , Figure 4 , a preloaded electromagnetic-elastic foil gas combined bearing, including an electromagnetic bearing 1 and an elastic foil bearing 3 nested between the electromagnetic bearing 1 and the rotor journal 2, wherein the inner wall of the electromagnetic bearing 1 is set There are n (n=4, 6, 8, 10, 12) magnetic poles 4 and end caps 5 that compress the magnetic poles 4 in the axial direction, and the magnetic poles 4 are provided with coils 6, and the coils 6 are dipped in paint and placed on them. Both ends are bonded with insulating paper for fixing, and a boss 7 is set radially outward 5 mm at the pole shoe 17 of the magnetic pole 4 close to the end of the elastic foil bearing 3 . The structure of the combined bearing magnetic pole 4 of the present invent...

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Abstract

The invention discloses a gas combination bearing provided with a pretension electromagnetic-elastic foil; the gas combination bearing comprises an electromagnetic bearing and an elastic foil bearing which is nested between the electromagnetic bearing and a rotor journal; the inner wall of the electromagnetic bearing is provided with a magnetic pole and an end cover is arranged at the axial direction thereof; a boss is arranged on the magnetic pole; an extension part is arranged on a bearing seat component of the foil bearing; a groove is arranged on the inner wall of the bearing seat component at the extension part which is evenly distributed along the circumference direction; a top-layer elastic foil and a bottom-layer elastic wave foil are arranged in the groove by pretension; when a coil is electrified, an electromagnetic field is formed between a pole shoe and the rotor journal; the pole shoe generates an attraction force to the rotor journal; and when the rotating speed is increased to a certain value, a pretension force which is formed between the top-layer elastic foil and the rotor journal and offsets the top-layer elastic foil causes the rotor to float. The gas combination bearing has the advantages of small volume, appropriate damp, low cost, low power consumption and high bearing capacity.

Description

technical field [0001] The invention belongs to the technical field of high-speed oil-free lubricating support equipment, in particular to an electromagnetic-elastic foil gas composite bearing with preload. Background technique [0002] Since the electromagnetic bearing supports the rotor through non-mechanical contact electromagnetic force and electronic control, it does not need lubrication and sealing, and completely eliminates wear; at the same time, because it is controllable, it can actively control the position of the rotor, and control The system can determine the stiffness and damping of the bearing, which has good designability; because the electromagnetic bearing is controllable and adjustable during the movement, it has good dynamic performance; in addition, it also has a long life and a wide operating temperature range (-253~+450℃) and other characteristics. However, due to reasons such as magnetic saturation of materials and electromagnetic heating, it is impo...

Claims

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Application Information

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IPC IPC(8): F16C32/00
Inventor 耿海鹏王海娟戚社苗虞烈孙岩桦周健
Owner XI AN JIAOTONG UNIV
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