JP2006177406A - Magnetic auxiliary bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic auxiliary bearing for achieving power saving effects with a shaft core being stably rotated following a shaft, and for reducing its noises with the shaft center maintaining stable operation. <P>SOLUTION: The magnetic auxiliary bearing comprises the shaft core, a fan base, and a bearing. A plurality of spherical bodies are provided in a bearing case. The bearing is fitted to the shaft core and the shaft core is rotated while being supported by the bearing. The fan base has a hollow shaft block and forms a storage space, and the shaft core is installed in the shaft block. A magnetic component is annularly installed around the shaft core for generating magnetic attracting effects on the shaft core. Thus, a fan blade wheel hub is fixed to a predetermined position. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a kind of magnetic auxiliary bearing. In particular, using at least one magnetic component installed in a shaft of a kind of motor, the shaft core is sucked, and thus the shaft core can be stably rotated according to the shaft, and the sphere and the bearing can be operated smoothly. Related to magnetic auxiliary bearings.

With the rapid development of the IT industry, the processing speed of CPUs for electronic products is also increasing, and the amount of heat generated is increasing accordingly. In order to effectively eliminate such heat, a heat dissipating device is currently the most basic deployment. In the heat dissipating device, a heat dissipating fan is commonly used because it is convenient to use and has a reasonable price.
The quality of the heat dissipation fan often depends on the operating condition of the motor. That is, instability of the motor operation can adversely affect the normal operation of the system or the entire system, and motor bearings are the key to motor mass and operational stability.
Usually, a plurality of spheres are used inside a ball bearing of a general motor. When the bearing is operated, the sphere rotates in the bearing case.
However, in the known bearing, play that adversely affects the operation and performance of the motor is likely to occur, resulting in drawbacks such as vibration, noise, heat generation, and waste of power.

The improvement of the heat-dissipating fan structure shown in the Chinese Patent Publication No. 535855 consists of fan blades, coil assembly, circuit board and bottom plate.
The fan blade has an axial core and is fitted into the coil set. The coil set includes a ball bearing and an oil-impregnated bearing that are stacked one above the other. The upper and lower sides of the two bearings are held on the shaft core by an O-shaped ring and a C-shaped ring.
A magnetic device is installed on the bottom plate corresponding to the position of the bottom end of the shaft core, and the shaft core is attracted by the magnetic device. Thereby, the fan blade is sucked and fixed at the fixed position, and pressure is applied to the ball bearing. Thus, the balls in the ball bearing are operated in the same track. Furthermore, since the magnetic device also attracts the shaft core, it is possible to eliminate noise generated during friction.
However, since the magnetic device installed in the known technology has a flat plate shape, the magnetic device can exert an attractive force only on the bottom end of the shaft core. There is a drawback that it is impossible to prevent movement and abnormal noise.

The present invention provides a magnetic auxiliary bearing that solves the problems of the above structure.
It installs magnetic parts in an annular shape around the shaft core, generates a magnetic attraction action on the shaft core, and thereby the shaft core rotates stably according to the shaft, achieving a power saving effect,
Furthermore, it can reduce noise by maintaining stable operation of the shaft core,
The magnetic auxiliary bearing of the present invention can be applied to various types of bearings.

In order to solve the above problems, the present invention provides the following magnetic auxiliary bearing.
It mainly includes the shaft core, fan base, bearing,
The bearing case includes a plurality of spheres, the bearing is fitted on the shaft core, the shaft core receives and supports the bearing, and rotates.
The fan base includes a hollow shaft base to form a housing space, the shaft core is installed in the shaft base,
A magnetic auxiliary bearing is characterized in that a magnetic component is provided in an annular shape around the shaft core, a magnetic attraction action is generated on the shaft core, and the fan blade wheel strain is fixed at a fixed position.

As described above, the present invention produces a magnetic attracting action on the shaft core by the magnetic parts installed in an annular shape around the shaft core, and thus the shaft core rotates stably according to the shaft to achieve a power saving effect, Furthermore, stable operation of the shaft core can also reduce noise. The magnetic auxiliary bearing of the present invention is applicable to various types of bearings.

As shown in FIG. 1, the present invention includes a fan blade set 10, a motor set 20, and a fan base 30.
The fan wing assembly 10 includes a fan wing wheel strainer 11, a shaft core 12, a motor case 13, and a bar magnet 14. The shaft core 12 is installed on a shaft base 111 formed at the center of the bottom of the fan blade wheel strainer 11, the motor case 13 is disposed on the inner edge of the fan blade wheel strainer 11, and the bar magnet 14 is Installed on the inner edge of the motor case 13.
The motor set 20 is fitted on the fan base 30, and the motor set 20 includes an insulating frame 21, a silicon steel piece 22, a circuit board 23, and a coil 24. The silicon steel piece 22 is installed outside the insulating frame 21, and the coil 24 and the silicon steel piece 22 are wound around the insulating frame 21.
A hollow shaft base 31 is provided at the center of the fan base 30, and the circuit board 23 is installed between the bottom of the insulating frame 21 and the shaft base 31. The shaft core 12 is installed in a housing space formed by the shaft base 31. Between the outside of the shaft core 12 and the shaft base 31, a bearing 32 (the bearings are various types such as a ball bearing, an oil-impregnated bearing, and a dynamic pressure bearing). ). As a result, the shaft core 12 rotates with the support of the bearing 32.

One end of the shaft core 12 that is not connected to the fan blade wheel strainer 11 can be formed in various forms (see FIGS. 1, 2, and 3) as necessary, and a ring hook 15 (see FIGS. 1, 2 and 3). Reference) can be fitted. In addition, the magnetic component A is annularly installed around the shaft core 12, and a magnetic attraction action is generated on the shaft core 12. Thus, the fan blade wheel strainer 11 is fixed at a fixed position.
The bearing 32 is a ball bearing, an oil-impregnated bearing, a hydrodynamic bearing, or the like, but can provide a stable working force along its axis, particularly when applied to an oil-impregnated bearing and other types of bearings. Therefore, the bearing 32 can be operated smoothly to improve the operation efficiency of the motor, reduce defects such as vibration, noise, heat generation, and waste of power, and extend the service life.
Further, the shaft base 31 has a bottom 311 and can hold one end of the shaft 12 that is not connected to the fan blade wheel strainer 11. The bottom portion 311 is an independent component, and is separated from the shaft base 31 and prevents the magnetic component A from contacting the shaft core 12 (the magnetic component and the shaft core are spaced apart from each other). That is, the outer edge of the magnetic component A is in contact only with the inner edge of the shaft base 31.

Next, as shown in FIGS. 2 and 3, in the second and third optimum embodiments of the present invention, the structure is substantially the same as that of the first optimum embodiment. The difference will be described below.
The size of the magnetic component A corresponds to the shaft core 12, and the shape or size of the bearing 32 can be adjusted.
The above is the description of the optimum embodiment of the present invention, and all changes in the above-described method, shape, structure and apparatus using the present invention are included in the scope of the present invention. For example, the shape or installation form of the magnetic component A can be changed, and actions having equivalent effects caused by various changes, modifications, and applications are included in the scope of the right of the present invention.

It is an instruction diagram of the first optimum embodiment of the present invention. It is an instruction diagram of the second optimum embodiment of the present invention. It is an instruction diagram of the third optimum embodiment of the present invention.

Explanation of symbols

10 Fan blade assembly 11 Fan blade wheel strainer 111 Shaft base 12 Shaft core 13 Motor case 14 Bar magnet 15 Ring hook 20 Motor assembly 21 Insulating frame 22 Silicon steel piece 23 Circuit board 24 Coil 30 Fan base 31 Shaft base 311 Bottom 32 Bearing 33 hole
A Magnetic parts

Claims (3)

Mainly including shaft core, fan base, bearing,
The bearing is fitted to the shaft core, and the shaft core rotates by receiving support from the bearing,
The fan base includes a hollow shaft base to form a housing space, and the shaft core is installed in the shaft base,
A magnetic auxiliary bearing characterized in that a magnetic part is installed in an annular shape around the shaft core, a magnetic attraction action is generated on the shaft core, and the fan blade wheel stiffness is fixed at a fixed position. The magnetic auxiliary bearing according to claim 1, wherein the magnetic component and the shaft core maintain a constant distance. The magnetic auxiliary bearing according to claim 1 or 2, wherein an outer edge of the magnetic component and an inner edge of the shaft base are in contact with each other.

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