CN209389825U - A kind of magnetic axis holder structure of embedded magnetic shield - Google Patents
A kind of magnetic axis holder structure of embedded magnetic shield Download PDFInfo
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- CN209389825U CN209389825U CN201822124494.0U CN201822124494U CN209389825U CN 209389825 U CN209389825 U CN 209389825U CN 201822124494 U CN201822124494 U CN 201822124494U CN 209389825 U CN209389825 U CN 209389825U
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- magnetic bearing
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- shield
- radial direction
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Abstract
The utility model discloses a kind of magnetic axis holder structures of embedded magnetic shield, a magnetic shield is arranged outside radial direction magnetic bearing, and transition fit is cooperated using transition fit or slight interference between radial direction magnetic bearing and magnetic shield, the radial direction magnetic bearing for being arranged magnetic shield is set in magnetic bearing seat, and radial direction magnetic bearing fixed ring is fixed on magnetic bearing seat；Two thrust magnetic bearings are separated by certain interval setting, spacer ring is placed between two thrust magnetic bearings, thrust magnetic bearing and spacer ring collectively constitute thrust magnetic bearing unit, one magnetic shield is sheathed on thrust magnetic bearing unit, and cooperated between magnetic shield and thrust magnetic bearing unit using small―gap suture, the thrust magnetic bearing unit for being arranged magnetic shield is set in magnetic bearing seat, and thrust magnetic bearing fixed ring is fixed on magnetic bearing seat, using interference fit between magnetic shield and magnetic bearing seat.Relatively thin stainless steel sleeve can be obtained by tubing, and raw material are easily obtained, and not need that very big shrink value is arranged, and can satisfy the requirement of repeated disassembled and assembled.
Description
Technical field:
The utility model relates to a kind of magnetic axis holder structures of embedded magnetic shield.
Background technique:
In magnetic suspension bearing motor, the main magnetic circuit of magnetic bearing is by the permeability magnetic material of magnetic bearing rotor, magnetic bearing stator
Permeability magnetic material (silicon steel sheet, pure iron etc.) and air gap three parts composition, and leakage magnetic circuit is referred to as by the magnetic circuit other than this three, it leaks
Magnetic circuit will affect the working efficiency of magnetic bearing.In engineer application, because the stator and rotor material of magnetic bearing can not be deposited independently
, usually depend on other components, such as magnetic bearing rotor is usually connected with rotor, magnetic bearing stator then with motor cabinet
It is connected, so needing to consider influence of the depended on components for magnetic bearing magnetic circuit.
In general, considering from cost and molding difficulty angle in practical application, aluminium alloy or non-magnetic stainless steel can be selected
Material is used as magnetic bearing seat, when magnetic bearing is installed in the magnetic bearing seat of this kind of materials, it is possible to reduce the generation of leakage magnetic circuit.
When using aluminium alloy as magnetic bearing seat, because of the difference of the thermal expansion coefficient of aluminium alloy and magnetic bearing silicon steel sheet
Not, magnetic bearing usually requires to be designed in a shrink value assembly and magnetic bearing seat according to the operating temperature estimated, swollen to offset heat
Swollen bring influences.With power of motor, the raising of volume, the key dimension of magnetic bearing is also being improved, then is meaned required
Magnitude of interference also improving, it means that assembly difficulty is also got higher.And after elastic conjunction, magnetic bearing at this moment will not
Has repeated disassembled and assembled.
When using non-magnetic stainless steel, because of the characteristic of stainless steel material, then it can bring high material cost and add
Work cost.
Fig. 2 is a kind of common magnetic axis holder structure form, and radial direction magnetic bearing is requirement that higher operating accuracy is usual
Using elastic conjunction in the magnetic bearing seat made by non-magnet material, and it is fixed by radial direction magnetic bearing fixed ring.It is a pair of
After thrust magnetic bearing is separated by spacer ring, generally also it is assemblied in magnetic bearing seat using transition fit, by thrust magnetic bearing fixed ring
It is fixed.
When magnetic bearing works normally, magnetic circuit notices that arrow is only done and illustrates, not refer in particular to along closed path shown in Fig. 2
A direction.
But when magnetic axis bearing structure as motor increases, when to magnitude of interference increase in demand, biggish shrink value can be to assembly
Technique proposes harsh requirement, or when in order to reduce the materials such as cost selection carbon steel, cast iron, the permeance of material is again right
The work of magnetic bearing has an adverse effect, as shown in Figure 3.Thrust magnetic bearing stator is closed in addition to being formed with thrust magnetic bearing rotor
Magnetic circuit outside, can also pass through magnetic bearing seat and another thrust magnetic bearing and form magnetic circuit, i.e. leakage magnetic circuit.Some leakage magnetic circuits are can
It is quantitatively evaluated, such as due to the leakage magnetic circuit that coil itself generates, the leakage magnetic circuit on the left of Fig. 3, and as caused by peripheral base
Leakage magnetic circuit can not then be estimated, so this kind of leakage magnetic circuits should avoid.
Utility model content:
The utility model is to provide a kind of magnetic axis of embedded magnetic shield to solve the above-mentioned problems of the prior art
Holder structure.
Technical solution used by the utility model has: a kind of magnetic axis holder structure of embedded magnetic shield, including magnetic bearing
Seat, radial direction magnetic bearing, radial direction magnetic bearing fixed ring, thrust magnetic bearing, thrust magnetic bearing fixed ring, spacer ring and magnetic shield, it is described
It is arranged a magnetic shield outside radial direction magnetic bearing, and transition fit uses transition fit or small between radial direction magnetic bearing and magnetic shield
Interference fit, the radial direction magnetic bearing for being arranged magnetic shield are set in magnetic bearing seat, and radial direction magnetic bearing fixed ring is fixed on magnetic bearing seat
On, and radial direction magnetic bearing is positioned in magnetic bearing seat；
Two thrust magnetic bearings are separated by certain interval setting, and spacer ring is placed between two thrust magnetic bearings, thrust magnetic bearing with
Spacer ring collectively constitutes thrust magnetic bearing unit, and a magnetic shield is sheathed on thrust magnetic bearing unit, and magnetic shield and thrust magnetic
Cooperated between bearing unit using small―gap suture, the thrust magnetic bearing unit for being arranged magnetic shield is set in magnetic bearing seat, thrust magnetic axis
It holds fixed ring to be fixed on magnetic bearing seat, and thrust magnetic bearing unit is positioned in magnetic bearing seat, magnetic shield and magnetic bearing seat
Between using interference fit.
Further, the magnetic bearing seat uses magnetic conductive metal material or non-magnetic metal material, and magnetic shield is using non-
Metal magnetic conducting material.
The utility model has the following beneficial effects:
1) relatively thin stainless steel sleeve can be obtained by tubing, and raw material are easily obtained, and it is very big not need setting
Shrink value, can satisfy the requirement of repeated disassembled and assembled.
2) it can be significantly reduced material old using carbon steel or cast iron materials production magnetic bearing seat.
Detailed description of the invention:
Fig. 1 is the utility model separation structure figure.
Fig. 2 and Fig. 3 is magnetic axis holder structure form in the prior art.
Specific embodiment:
The utility model will be further described below with reference to the accompanying drawings.
As shown in Figure 1, a kind of magnetic axis holder structure of embedded magnetic shield of the utility model, including magnetic bearing seat 1, radial magnetic
Bearing 2, radial direction magnetic bearing fixed ring 3, thrust magnetic bearing 4, thrust magnetic bearing fixed ring 5, spacer ring 6 and magnetic shield 7, radial magnetic axis
It holds and is arranged a magnetic shield 7 outside 2, and radial direction magnetic bearing 2 and magnetic shield 7 are cooperated using transition fit or slight interference, to ensure
The assembly concentricity of radial direction magnetic bearing 2.The radial direction magnetic bearing 2 for being arranged magnetic shield 7 is set in magnetic bearing seat 1, and radial direction magnetic bearing is solid
Determine ring 3 to be fixed on magnetic bearing seat 1, and radial direction magnetic bearing 2 is positioned in magnetic bearing seat 1.Two thrust magnetic bearings 4 are separated by one
Fixed gap setting, spacer ring 6 are placed between two thrust magnetic bearings 4, and thrust magnetic bearing 4 and spacer ring 6 collectively constitute thrust magnetic bearing list
Member, a magnetic shield 7 are sheathed on thrust magnetic bearing unit, and small―gap suture is used between magnetic shield 7 and thrust magnetic bearing unit
Cooperation crosses because thrust magnetic bearing unit has no too high demand to concentricity and takes clearance fit convenient for assembly.Be arranged every
The thrust magnetic bearing unit of magnetosheath 7 is set in magnetic bearing seat 1, and thrust magnetic bearing fixed ring 5 is fixed on magnetic bearing seat 1, and will
Thrust magnetic bearing unit is positioned in magnetic bearing seat 1.Using interference fit between magnetic shield 7 and magnetic bearing seat 1.
Magnetic bearing seat 1 uses magnetic conductive metal material or non-magnetic metal material, and magnetic shield 7 uses nonmetallic permeability magnetic material
(such as high temperature alloy, non-magnetic stainless steel, aluminium alloy etc.).
Magnetic shield 7 in the utility model can reduce influence when leakage field works for magnetic bearing, and because every magnetic
The material selection range of the presence of set, magnetic bearing seat will be widened, and aluminium alloy or stainless steel are no longer limited to.
It furthermore is stainless steel material with magnetic shield 7, magnetic bearing seat is carbon steel or cast iron materials to illustrate, radial direction magnetic bearing
Assembly do not needing biggish magnitude of interference, as long as being theoretically set as transition fit, that is, can guarantee at work magnetic bearing with
Magnetic bearing seat avoids gap from generating, this is because the coefficient of expansion of aluminium alloy is higher than stainless steel, the coefficient of expansion of stainless steel compares carbon
Steel is high, and the coefficient of expansion of material from inside to outside successively successively decreases, then will not necessarily generate each other again after temperature increases
Gap.Relatively thin stainless steel sleeve can be obtained by tubing, and raw material are easily obtained, and not need that very big interference is arranged
Value, can satisfy the requirement of repeated disassembled and assembled.It can be significantly reduced material old using carbon steel or cast iron materials production magnetic bearing seat.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
It for art personnel, can also make several improvements without departing from the principle of this utility model, these improvement also should be regarded as
The protection scope of the utility model.
Claims (2)
1. a kind of magnetic axis holder structure of embedded magnetic shield, it is characterised in that: including magnetic bearing seat (1), radial direction magnetic bearing (2),
Radial direction magnetic bearing fixed ring (3), thrust magnetic bearing (4), thrust magnetic bearing fixed ring (5), spacer ring (6) and magnetic shield (7), it is described
It is arranged a magnetic shield (7) outside radial direction magnetic bearing (2), and transition fit used between radial direction magnetic bearing (2) and magnetic shield (7)
Cooperation or slight interference cooperation are crossed, the radial direction magnetic bearing (2) for being arranged magnetic shield (7) is set in magnetic bearing seat (1), radial direction magnetic bearing
Fixed ring (3) is fixed on magnetic bearing seat (1), and radial direction magnetic bearing (2) is positioned in magnetic bearing seat (1)；
Two thrust magnetic bearings (4) are separated by certain interval setting, and spacer ring (6) is placed between two thrust magnetic bearings (4), thrust magnetic axis
It holds (4) and spacer ring (6) and collectively constitutes thrust magnetic bearing unit, a magnetic shield (7) is sheathed on thrust magnetic bearing unit, and every
Cooperated between magnetosheath (7) and thrust magnetic bearing unit using small―gap suture, the thrust magnetic bearing unit for being arranged magnetic shield (7) is set to magnetic
In bearing block (1), thrust magnetic bearing fixed ring (5) is fixed on magnetic bearing seat (1), and thrust magnetic bearing unit is positioned at magnetic
In bearing block (1), using interference fit between magnetic shield (7) and magnetic bearing seat (1).
2. the magnetic axis holder structure of embedded magnetic shield as described in claim 1, it is characterised in that: the magnetic bearing seat (1) is adopted
With magnetic conductive metal material or non-magnetic metal material, magnetic shield (7) uses nonmetallic permeability magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822124494.0U CN209389825U (en) | 2018-12-18 | 2018-12-18 | A kind of magnetic axis holder structure of embedded magnetic shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822124494.0U CN209389825U (en) | 2018-12-18 | 2018-12-18 | A kind of magnetic axis holder structure of embedded magnetic shield |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209389825U true CN209389825U (en) | 2019-09-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822124494.0U Active CN209389825U (en) | 2018-12-18 | 2018-12-18 | A kind of magnetic axis holder structure of embedded magnetic shield |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209389825U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020125116A1 (en) * | 2018-12-18 | 2020-06-25 | 南京磁谷科技有限公司 | Magnetic bearing seat structure having built-in magnetic shields |
| CN112065864A (en) * | 2020-08-28 | 2020-12-11 | 中国航发贵阳发动机设计研究所 | Design method of ball bearing axial play control device |
-
2018
- 2018-12-18 CN CN201822124494.0U patent/CN209389825U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020125116A1 (en) * | 2018-12-18 | 2020-06-25 | 南京磁谷科技有限公司 | Magnetic bearing seat structure having built-in magnetic shields |
| CN112065864A (en) * | 2020-08-28 | 2020-12-11 | 中国航发贵阳发动机设计研究所 | Design method of ball bearing axial play control device |
| CN112065864B (en) * | 2020-08-28 | 2022-09-09 | 中国航发贵阳发动机设计研究所 | Design method of ball bearing axial play control device |
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| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 99, Jinxin Middle Road, Jiangning District, Nanjing City, Jiangsu Province Patentee after: Nanjing Cigu Technology Co., Ltd Address before: Nine No. 211102 Bamboo Road, Jiangning Development Zone, Nanjing, Jiangsu, 100 Patentee before: NANJING CIGU LIMITED Corp. |