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High speed electric spindle supported by all-permanent magnet bearing

A technology of high-speed electric spindle and permanent magnetic bearing, which is applied in the direction of casing/housing/support, magnetic attraction or thrust holding device, electrical components, etc., and can solve the problems that cannot be widely applied, complex system, high cost, etc. , to achieve the effect of eliminating the need for lubrication and sealing devices, strong environmental adaptability, and low heat generation

Inactive Publication Date: 2012-05-02
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the electric spindles supported by magnetic bearings mainly include electric spindles supported by electromagnetic bearings. Although electromagnetic bearings have the characteristics of no friction and wear and controllability, due to the need for an external control system, the system is complicated, large in size, and high in cost. It is mainly in the stage of laboratory research and cannot be widely applied in industry

Method used

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  • High speed electric spindle supported by all-permanent magnet bearing
  • High speed electric spindle supported by all-permanent magnet bearing
  • High speed electric spindle supported by all-permanent magnet bearing

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Preferred embodiments of the present invention are described as follows in conjunction with the accompanying drawings:

[0026] This example is: see figure 1 , the high-speed electric spindle supported by full permanent magnetic bearings, including motor stator (9), motor rotor (7), rotating shaft (1), casing (6), front cover (2), front bearing seat (5), rear bearing Seat (12), back cover (16) and supporting system etc. The support system includes: two pairs of radial permanent magnetic bearings (moving magnetic rings 3 and 10, static magnetic rings 4 and 11) as radial support bearings, two-way permanent magnetic thrust bearings (static magnetic rings 13, 15 and moving magnetic rings 14) As an axial support bearing. The two pairs of radial permanent magnetic bearings (moving magnetic rings 3 and 10, static magnetic rings 4 and 11) are installed on both sides of the motor rotor 8, and the two-way permanent magnetic thrust bearings (static magnetic rings 13, 15 and dyna...

Embodiment 2

[0028] This embodiment is basically the same as Embodiment 1, and the special features are as follows:

[0029] see figure 1 The motor stator (9) and the motor rotor (7) installed in the electric spindle are placed in the cavity in the housing (6), and the motor stator (9) is fixedly connected to the inner wall of the housing (6). A cooling water channel (8) is arranged on the casing (6) to connect to the cooling system to cool the outside of the built-in motor stator (9).

[0030] The supporting system principle and supporting system layout of the rotating shaft (1) can be found in figure 2 , the magnetic pole direction of the moving magnetic ring (3) and the static magnetic ring (4) in the radial permanent magnetic bearing (19) at the left end are the same, and the moving magnetic ring (10) and the static magnetic ring (11) in the radial permanent magnetic bearing (18) at the right end ) The magnetic poles have the same direction, and they are all repulsive radial permane...

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Abstract

The invention discloses a high speed electric spindle supported by an all-permanent magnet bearing. The high speed electric spindle comprises a motor stator, a motor rotor, a rotating shaft, a housing, a front cover, a front bearing pedestal, a rear bearing pedestal, a rear cover and a bearing system. The bearing system is characterized in that: two radial permanent magnet bearings are used as radial support bearings; one axial bidirectional permanent magnet thrust bearing is used an axial support bearing; the two radial permanent magnet bearings respectively include two moving magnet rings and two static magnet rings as well as are installed at two sides of the motor rotator; and the bidirectional permanent magnet thrust bearing is formed by two static magnet rings and one moving magnet ring as well as is installed at one end of the rotating shaft. According to the high speed electric spindle supported by an all-permanent magnet bearing in the invention, an all-permanent magnet bearing that is free of friction and wearing as well as does not need auxiliary support and external control is utilized as a support part of an electric spindle, so that an axial load and a radial load are beared; and therefore, functions of complete support and stable suspension for a rotating bearing of the electric spindle are realized.

Description

technical field [0001] The invention relates to a high-speed electric spindle supported by full permanent magnetic bearings in the field of electromechanical engineering. Background technique [0002] As a technology with great development potential and prospects, maglev technology has attracted much attention at home and abroad, and its benefits are obvious to all. As the core functional component of modern high-speed machining, the electric spindle is a function of integrating the drive motor to realize the mechatronics of functions such as the motor and the spindle. At present, the electric spindles supported by magnetic bearings mainly include electric spindles supported by electromagnetic bearings. Although electromagnetic bearings have the characteristics of no friction and wear and controllability, due to the need for an external control system, the system is complicated, large in size, and high in cost. It is mainly in the stage of laboratory research and cannot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N15/00H02K5/20
Inventor 李松生陈剑陈斌周鹏黄晓
Owner SHANGHAI UNIV
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