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Gas dynamic pressure bearing, motor and fan motor

A gas dynamic pressure bearing, axial technology, applied in the direction of sliding contact bearings, rotating bearings, bearings, etc., can solve problems such as inability to ensure space, achieve the effect of reducing vibration or noise, and stabilizing air volume

Active Publication Date: 2020-10-09
NIDEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a structure in which the above-mentioned axial bearing is arranged in a limited space near the bearing is applied, it may not be possible to ensure a space for arranging the magnet for the axial bearing or a magnetic force capable of supporting a load in the axial direction.

Method used

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  • Gas dynamic pressure bearing, motor and fan motor
  • Gas dynamic pressure bearing, motor and fan motor
  • Gas dynamic pressure bearing, motor and fan motor

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Experimental program
Comparison scheme
Effect test

no. 1 approach ＞

[0022]

[0023] The fan motor 1 according to the first embodiment of the present invention is mounted, for example, inside a housing of a personal computer, and is used as a device for supplying cooling air flow. However, the fan motor 1 can also be used as a device for supplying air flow for cooling to a space such as a home appliance such as a refrigerator, a high-temperature device such as a vehicle headlight, or a server system in which a plurality of electronic devices are arranged. figure 1 It is a vertical cross-sectional view of the fan motor 1 according to the first embodiment of the present invention. Such as figure 1 As shown, the fan motor 1 has a motor 10 , an impeller 50 and a housing 60 .

[0024]

[0025] Next, the structure of the motor 10 will be described. The motor 10 is a device that rotates the impeller 50 according to a driving current. Such as figure 1 As shown, the motor 10 has a stationary part 2 and a rotating part 3 . The stationary part 2 ...

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Abstract

Provided are a gas dynamic pressure bearing, a motor, and a fan motor, the gas dynamic pressure bearing having: a shaft that is rotatable about a central axis and has a shaft dynamic pressure part; and a sleeve having a sleeve dynamic pressure part opposed to the shaft dynamic pressure part with a gap therebetween in the radial direction, in which one side of the gas dynamic pressure bearing in the axial direction has an axial bearing part that can be positioned in the axial direction by means of a rotation-side magnet supported by the shaft and a fixed-side magnet supported by the sleeve. Therotation-side magnet has a cylindrical shape extending in the axial direction and has different magnetic poles in the axial direction. The fixed-side magnet has a cylindrical shape extending in the axial direction, faces the rotation-side magnet with a gap therebetween in the radial direction, and has a magnetic pole different from the magnetic pole of the rotation-side magnet in the radial direction. The two axial end parts of the fixed side magnet are provided with fixed side auxiliary components of a strong magnetic body.

Description

technical field [0001] The present invention relates to an aerodynamic bearing, a motor having the aerodynamic bearing, and a fan motor having the motor and an impeller. Background technique [0002] Conventionally, motors using gas dynamic pressure bearings are known. The rotating member of the motor is rotatably supported with respect to the stationary member via a gas dynamic pressure bearing. A slight gap is provided between the rotating member and the stationary member in the portion where the gas dynamic pressure bearing is formed. Furthermore, dynamic pressure generating grooves are provided on at least one surface of the rotating member and the stationary member that constitutes the gap. Furthermore, an axial bearing that supports the rotating member of the motor relative to the stationary member in the axial direction is provided. The rotating parts of the motor are supported in the axial direction by the magnets of the axial bearings. The structure of a convent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/04F16C17/08H02K7/09H02K5/167
CPCF16C32/0402F16C32/0417F16C17/08H02K7/09H02K5/167F16C2380/26F16C2360/46F16C17/026F16C32/0427
Inventor 福岛和彦玉冈健人
Owner NIDEC CORP
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