CN2419413Y

CN2419413Y - Magnetic suspension bearing

Info

Publication number: CN2419413Y
Application number: CN00208926U
Authority: CN
Inventors: 黄文喜; 张楯成
Original assignee: Delta Electronics Inc
Current assignee: Taida Electronic Industry Co Ltd; Delta Electronics Inc
Priority date: 2000-04-10
Filing date: 2000-04-10
Publication date: 2001-02-14
Anticipated expiration: 2010-04-10

Abstract

The utility model relates to a magnetic suspension shaft bearing, which is used for assembling a rotating shaft on a base. The utility model comprises a magnetic suspension part and a shaft bearing part, wherein, the magnetic suspension part is connected with the rotating shaft and the base; the shaft bearing part is connected with the rotating shaft, the base and the magnetic suspension part to support the rotating shaft to rotate; the magnetic suspension part comprises an upper magnetic suspension part and a lower magnetic suspension part which are respectively positioned at the upper part and the lower part of the shaft bearing part; the upper magnetic suspension part comprises an inner magnetic loop and an outer magnetic loop; the lower magnetic suspension part comprises a first magnetic loop, a second magnetic loop and a third magnetic loop which are overlapped. The formation of a magnetic force repulsion can reduce the friction force of the rotation of the rotating shaft. The magnetic suspension shaft bearing not only has the advantages of long service life and low cost, but also can improve industrial competitive power.

Description

A kind of magnetic bearing

The utility model relates to a kind of magnetic bearing, and You Zhike produces the magnetic bearing that radially repels and axially repel.

All a bearing can be arranged between the rotor of general motor and the stator, when being used for making rotor in stator, to rotate, can carry out very smoothly, simultaneously also can fixed rotor, make rotor can be not up and down or about skew.

Bearing commonly used has two kinds of ball bearing and self-lubricating bearings.This structure brief description of two kinds is as follows:

Figure 1A, 1B are ball bearing 1 commonly used.In bearing inside several balls 11 are arranged promptly, be used for making inwall 13 to rotate outside outer wall 12, and outer wall generally is engaged on the pedestal or on the stator, inwall then is engaged in the rotating shaft of rotor.

Fig. 2 is the application schematic representation of ball bearing commonly used.Epitrochanterian rotating shaft 21 binds the inwall that is combined in ball bearing, and an available spring 22 withstands above bearing, makes the rotation of rotor more smooth-going, and the outer wall of bearing then is engaged on the stator 23.

The wear condition of ball bearing commonly used, usually be that peel off because of tired on ball or inside and outside ring surface, owing to ball is to encircle the outer ring and the outer shroud inner ring rolls in work, so the force bearing point of ball and inside and outside ring constantly changes on the bearing, and go round and begin again, after surpassing the fatigue limit of material itself, material will damage and can't use.

Fig. 3 A, 3B are the schematic representation of self-lubricating bearing 3 (sleeve) commonly used.There is the packing lubrication material self-lubricating bearing inside, is generally lubricant oil 31.Lubricant oil 31 can see through the capillary structure on the self-lubricating bearing, when rotating shaft is rotated, oil content can be infiltrated on the inwall 32, reaches lubricated effect.

Fig. 4 is the application schematic representation of self-lubricating bearing.Rotating shaft 21 is located in the inwall of self-lubricating bearing, and the lubricant oil 31 of self-lubricating bearing inside can infiltrate inwall with capillary phenomenon when rotating shaft is rotated, reach the purpose of lubricating bearings 3.And self-lubricating bearing system is fixed between the stator 23.

Self-lubricating bearing is added lubricant oil and can't be replenished, and make its abrasion situation even more serious owing to be sliding friction.

In a word, technique known has following shortcoming:

1, the life-span of ball bearing long, but price height.

2, the price of self-lubricating bearing is low, but the life-span is short.

The purpose of this utility model is the shortcoming according to above-mentioned known technology, and a kind of magnetic bearing is provided, and not only long service life, and price is also low, and the competitive ability that improves industry.

For achieving the above object, the utility model proposes a kind of magnetic bearing, in order to assemble a rotating shaft on a pedestal, comprise:

One magnetic floats portion, is to connect this rotating shaft and this pedestal, the frictional force that a magnetic repellence can reduce this rotating shaft rotation that forms; And

One bearing portion is to connect the floating portion of this rotating shaft, this pedestal and this magnetic, to support the rotation of this rotating shaft.

Described magnetic bearing, wherein the floating portion of this magnetic comprises on one floating portion of magnetic and the floating portion of magnetic once, lays respectively on this bearing portion down.

Described magnetic bearing wherein should be gone up the floating portion of magnetic and comprise an internal magnetic ring and an outer magnetic ring.

Described magnetic bearing, wherein the floating portion of this time magnetic comprises one of overlapping first magnet ring, one second magnet ring and one the 3rd magnet ring, and this first magnet ring and the 3rd magnet ring system connect this rotating shaft, and this second magnet ring system is connected this pedestal.

Described magnetic bearing wherein should be gone up the floating portion of magnetic and comprise one first magnet ring, one second magnet ring and one the 3rd magnet ring, and the 3rd magnet ring places this second magnet ring inside, and this first magnet ring system folds in this second magnet ring top.

Described magnetic bearing, wherein the 3rd magnet ring is connected this rotating shaft, and this second magnet ring system connects this pedestal.

Described magnetic bearing, wherein the floating portion of this time magnetic with should go up the floating portion of magnetic symmetry up and down.

Described magnetic bearing, wherein this bearing portion is a self-lubricating bearing (sleeve).

Described magnetic bearing, wherein this rotating shaft is the rotating shaft of a fan.

Described magnetic bearing, wherein this pedestal is the stator of a fan.

With to be described with reference to the accompanying drawings preferred embodiment of the present utility model, wherein:

Figure 1A is the schematic representation of ball bearing commonly used;

Figure 1B is the A-A sectional view along Figure 1A;

Fig. 2 is the application schematic representation of ball bearing commonly used;

Fig. 3 A is self-lubricating bearing schematic representation commonly used;

Fig. 3 B is the B-B sectional view along Fig. 3 A;

Fig. 4 is the application schematic representation of self-lubricating bearing commonly used.

Fig. 5 is magnetic bearing one schematic representation of the utility model;

Fig. 6 is magnetic bearing two schematic representation of the utility model.

See also shown in Figure 5.The magnetic bearing of the utility model comprises a floating portion of a magnetic and a bearing portion.Wherein system of the floating portion of magnetic connects this rotating shaft 21 and this stator 23 pedestals, by a magnetic repellence phenomenon to reduce the frictional force of this rotating shaft 21 rotations, and bearing portion is a self-lubricating bearing 3, is to connect the floating portion of this rotating shaft 21, this pedestal and this magnetic, uses the rotation of supporting this rotating shaft 21.

The floating portion of the magnetic of Fig. 5 has comprised the floating portion of last magnetic basically and has reached the floating portion of magnetic down.The floating portion of last magnetic has comprised three magnet rings, and first magnet ring 51 is connected with rotating shaft 21 with the 3rd magnet ring 53, and second magnet ring 52 then is connected with the stator 23 of fan.Gapped between the 3rd magnet ring 53 and second magnet ring 52, polarity is identical, can be by the strength of mutual exclusion, to reduce the frictional force of self-lubricating bearing 3, to increase the life-span of self-lubricating bearing when rotating shaft is rotated.In like manner, also there are three magnet rings 511,521,531 with the floating portion of last magnetic symmetry in the floating portion of following magnetic that is positioned at the below, can be used to reduce the frictional force of self-lubricating bearing, the life-span of raising self-lubricating bearing.

The floating portion of the magnetic of Fig. 6 also comprises floating portion of magnetic and the floating portion of magnetic once, lay respectively on this bearing portion under.The floating portion of last magnetic comprises an internal magnetic ring 73 and an outer magnetic ring 74, and the two polarity is identical repels each other.The floating portion of following magnetic comprises one of overlapping first magnet ring 75, one second magnet ring 76 and one the 3rd magnet ring 77, and this first magnet ring 75 and the 3rd magnet ring 77 are to connect this rotating shaft, and this second magnet ring 76 is to be connected these stator 23 pedestals.

The magnetic bearing structure of the utility model is because rotary part and stator position can be by magnetic floating mat repulsion, the friction area of minimizing rotating shaft, thus can alleviate traditional bearing structure wear problems, longer on working life.On the other hand if adopt plastics magnet, its price can level off to self-lubricating bearing, thereby can reach the low long-life purpose of unit price.

In sum, bearing structure of the present utility model, can reduce cost the working life that can increase bearing again, also can improve industrial competitiveness, has novelty, creativeness and practicability.

Be noted that any those skilled in the art of being familiar with, do not breaking away from improvement or the modification that spirit and scope of the present utility model are done, should be considered as belonging in the protection domain of the present utility model.

Claims

1, a kind of magnetic bearing in order to assemble a rotating shaft on a pedestal, is characterized in that it comprises:

One magnetic floats portion, is to connect this rotating shaft and this pedestal, and a formed magnetic repellence structure is to reduce the frictional force of this rotating shaft rotation; And

2, magnetic bearing as claimed in claim 1 is characterized in that, the floating portion of this magnetic comprises on one floating portion of magnetic and the floating portion of magnetic once, lays respectively on this bearing portion down.

3, magnetic bearing as claimed in claim 2 is characterized in that, floating portion of magnetic comprises an internal magnetic ring and an outer magnetic ring on this.

4, magnetic bearing as claimed in claim 2 is characterized in that, the floating portion of this time magnetic comprises one of overlapping first magnet ring, one second magnet ring and one the 3rd magnet ring, and this first magnet ring and the 3rd magnet ring system connect this rotating shaft, and this second magnet ring is connected this pedestal.

5, magnetic bearing as claimed in claim 2 is characterized in that, floating portion of magnetic comprises one first magnet ring, one second magnet ring and one the 3rd magnet ring on this, and the 3rd magnet ring system places this second magnet ring inside, and this first magnet ring system folds in this second magnet ring top.

6, magnetic bearing as claimed in claim 5 is characterized in that, the 3rd magnet ring system is connected this rotating shaft, and this second magnet ring system connects this pedestal.

7, magnetic bearing as claimed in claim 5 is characterized in that, magnetic floats portion's symmetry up and down to the floating portion of this time magnetic with being somebody's turn to do upward.

8, magnetic bearing as claimed in claim 1 is characterized in that, this bearing portion is a self-lubricating bearing.

9, magnetic bearing as claimed in claim 1 is characterized in that, this rotating shaft is the rotating shaft of a fan.

10, magnetic bearing as claimed in claim 1 is characterized in that, this pedestal is the stator of a fan.