CN206790233U - A kind of rotor structure of magnetic suspension ultrahigh speed magneto - Google Patents
A kind of rotor structure of magnetic suspension ultrahigh speed magneto Download PDFInfo
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- CN206790233U CN206790233U CN201720445754.7U CN201720445754U CN206790233U CN 206790233 U CN206790233 U CN 206790233U CN 201720445754 U CN201720445754 U CN 201720445754U CN 206790233 U CN206790233 U CN 206790233U
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Abstract
A kind of rotor structure of magnetic suspension ultrahigh speed magneto, including thrust dish axle, sheath, permanent magnet, axle, the first magnetic axis bearing assembly, the second magnetic axis bearing assembly are the utility model is related to, thrust dish axle is made up of left-hand axis and thrust disc, and thrust disc is solid construction；The part that thrust dish axle contacts with permanent magnet is hollow structure；The permanent magnet is cylindrical structural.Thrust disc and left-hand axis are integrally formed, it is made up of high-yield strength magnetic conductive metal material, wherein part is necessary for solid construction corresponding to thrust disc, maximum centrifugal stress half can be reduced, the part that thrust dish axle contacts with permanent magnet is necessary for hollow structure, can reduce the short circuit to magnetic field of permanent magnet and act on.The remainder of thrust dish axle can make hollow structure, reduce the weight of axle.Thrust disc and local hollow shaft integrated design, the maximum stress of thrust disk center can be significantly reduced, lift magnetic suspension super high speed motor rotor linear velocity and rotor dynamics, while reduce the bearing capacity of magnetic bearing.
Description
Technical field
The present invention relates to a kind of magnetic suspension ultrahigh speed technical field, relates particularly to a kind of magnetic suspension ultrahigh speed Permanent Magnet and Electric
The rotor structure of machine.
Background technology
The profile of the main flow structure of current magnetic suspension ultrahigh speed magneto is as shown in figure 1, its major defect is：
(1) axle is solid construction, it is necessary to using non-magnet material, such as non-magnetic stainless steel etc., is just avoided that permanent magnet
Magnetic field short circuit is produced with the contact portion of axle, when magnetic field occurs short-circuit, huge leakage field can be produced, so as to weaken permanent magnet
Effective magnetic field；
(2) axle is solid construction, and weight is big, causes that the bearing capacity of magnetic bearing is excessive, and volume weight is higher；
(3) thrust disc must be made of permeability magnetic material, and its material is different with the material of axle, therefore thrust disc can only be made
Hollow disk, by crossing profit engagement sleeves on non-magnetic axle.Due to the effect of centrifugal force, hollow disk internal diameter is most
Big stress position, the stress and linear velocity it is square directly proportional, constrain the maximum linear velocity of rotor.
On magnetic-suspension high-speed permanent magnet machine rotor, it produces the part of the thrust disc, often maximum gauge of axial force, its
Linear velocity highest, suffered centrifugal force is maximum, and the strength of materials of thrust disc constrains the maximum linear velocity of rotor.Except taking more
The material of high intensity, how by designing the stress of thrust disc is reduced, become very crucial.
The content of the invention
The present invention is limited for material, rotating speed in the prior art, a kind of deficiency big from weight, there is provided magnetic suspension ultrahigh speed
The rotor structure of magneto, including thrust dish axle, sheath, permanent magnet, axle, the first magnetic axis bearing assembly, the second magnetic axis bearing assembly,
The thrust dish axle is made up of left-hand axis and thrust disc, and the thrust disc is solid construction；What thrust dish axle contacted with permanent magnet
Part is hollow structure；The permanent magnet is cylindrical structural.Thrust disc and left-hand axis are integrally molded so as thrust dish axle, are bent by height
Take intensity magnetic conductive metal material to be made, wherein part is necessary for solid construction corresponding to thrust disc, and can reduce maximum centrifugal should
Power half, the part that thrust dish axle contacts with permanent magnet are necessary for hollow structure, can reduce the short circuit to magnetic field of permanent magnet and make
With.The remainder of thrust dish axle can make hollow structure, reduce the weight of axle.The present invention is a kind of magnetic suspension ultrahigh speed electricity
The rotor structure of machine, its thrust disc and local hollow shaft (i.e. thrust reel) integrated design, can be significantly reduced in thrust disc
The maximum stress of the heart, magnetic suspension super high speed motor rotor linear velocity and rotor dynamics are lifted, while reduce magnetic bearing
Bearing capacity.
Preferably, the first magnetic axis bearing assembly of the side suit radial direction magnetic bearing of described thrust dish axle, the thrust
Dish axle and the first magnetic bearing component touch position, the first magnetic axis bearing assembly are circular ring structure, the first magnetic axis bearing assembly and thrust disc
Axle is assembled by being interference fitted, and ensures to release in the case where high speed rotates.
Preferably, the first magnetic axis bearing assembly by silicon steel sheet stack into reduce eddy-current loss.
Preferably, the first magnetic axis bearing assembly is identical with the structure of the second magnetic axis bearing assembly, the second magnetic axis bearing assembly
For radial direction magnetic bearing component, the second magnetic axis bearing assembly is attached with permanent magnet by interference fit, the second magnetic bearing group
Also include position limiting structure on part, this position limiting structure when suit for being positioned.
Preferably, described permanent magnet is SmCo or neodymium iron boron, and magnetizing direction is vertical with the axis of permanent magnet.Permanent magnetism
Body can both magnetize in the pre-assembly, can also magnetize after assembly.
Preferably, the sheath is annulus cylindricality, and material is non-magnet_conductible material, for example, titanium alloy, inconel718 or
Person's carbon fiber.
Preferably, the material of above-mentioned axle can be that magnetic conduction can also be that non-magnet_conductible material is made.If non-magnetic material
Material, which can both make hollow structure, reduces weight or solid construction.If permeability magnetic material, then contacted with permanent magnet
One end must make hollow structure, because if magnetic conduction solid construction, can cause the short circuit of similar magnetic circuit
Great leakage field, cause the reduction of the useful flux of rotor and rotor yoke.
Preferably, the thrust dish axle is made up of high-yield strength magnetic conductive metal material.
The main characteristic of the invention lies in that：1st, thrust disc and axle are integrated, and are the magnetic conductive metal material of high intensity；
2nd, thrust disc is solid disk, and compared to hollow disc structure, maximum stress reduces nearly half；3rd, axle is except corresponding to thrust disc
Part, remainder middle can hollow out, and especially be necessary for hollow structure close to permanent magnetism body end, this kind of structure can avoid magnetic
Leakage field caused by the short circuit of field, while effectively reduce rotor weight.
The present invention has advantages below relative to prior art：1st, the maximum stress of solid thrust disc compares hollow structure
Half is reduced, therefore linear velocity can improve 40% or so；2nd, axle remainder can reduce the weight of rotor with hollow, drop
The low requirement for bearing capacity of magnetic bearing；3rd, rigidity reduction of the hollow space on axle influences smaller, but can effectively reduce rotor weight
Amount, so if it is reasonable in design, the first-order flexure critical speed of rotor can be improved.
Brief description of the drawings
In order to illustrate more clearly of the present invention, the required accompanying drawing used is simply situated between in being described below to embodiment
Continue.It should be evident that drawings in the following description are only the description to embodiments of the invention, for ordinary skill
For personnel, without having to pay creative labor, simple deformation or title can also be carried out according to technical scheme
Change, or customary means is taken, goal of the invention can also be realized.
Fig. 1 is the profile of magnetic suspension ultrahigh speed magneto in the prior art
Fig. 2 is a kind of rotor structure schematic diagram of magnetic suspension ultrahigh speed magneto
Fig. 3 is the rotor structure schematic diagram that a kind of one end axle is solid magnetic suspension ultrahigh speed magneto
Fig. 4 is the rotor structure schematic diagram that a kind of axle is solid magnetic suspension ultrahigh speed magneto
Label declaration：1- thrust dish axles；2- sheaths；3- permanent magnets；4- axles；5- the first magnetic axis bearing assemblies；
6- the second magnetic axis bearing assemblies
Embodiment
With reference to embodiment, the present invention is described in further detail, following examples be explanation of the invention and
The invention is not limited in following examples.
Embodiment 1
As shown in Fig. 2 present embodiment discloses a kind of rotor structure of magnetic suspension ultrahigh speed magneto, it is generally classical
Three sections of axle construction.Thrust disc and left-hand axis are combined into one, and are thrust dish axle 1, are made up of high-yield strength magnetic conductive metal material,
Wherein part is necessary for solid construction corresponding to thrust disc, can reduce maximum centrifugal stress half, thrust dish axle 1 and permanent magnet
The part of 3 contacts is necessary for hollow structure, can reduce the short circuit to the magnetic field of permanent magnet 3 and act on.The remainder of thrust dish axle 1
Hollow structure can be made, reduces the weight of axle 4.First magnetic axis bearing assembly of the right side suit radial direction magnetic bearing of thrust dish axle 1
5, it is circular ring structure, typically by silicon steel sheet stack into reduce eddy-current loss, the first magnetic axis bearing assembly 5 and thrust dish axle 1
Assembled by being interference fitted, ensure not release in the case where high speed rotates.
Permanent magnet 3 is cylindrical structural, is made up of SmCo material, and magnetizing direction is vertical with the axis of cylindrical permanent magnet 3,
Magnetized after magnetizing or assemble before can assembling.Sheath 2 is annulus cylindricality, this not using the high titanium alloy of tensile strength
Permeability magnetic material is made.
Axle 4 is primarily referred to as the right axle of rotor structure, and this section of shaft material can be that magnetic conduction can also be that non-magnet_conductible material is made,
The present embodiment is made of non-magnet_conductible material, and axle 4 makes hollow structure with the position that permanent magnet 3 contacts, and can so reduce weight
Amount.
The structure of second magnetic axis bearing assembly 6 is identical with the first magnetic axis bearing assembly 5, and is assembled by interference fit.
The step for one end limited location that the left side of second magnetic axis bearing assembly 6 is connected with permanent magnet, positioning when for being set with, step is in axle
Above 4.
Sheath 2 is annulus cylindricality, and material is non-magnet_conductible material titanium alloy.
Overall assemble sequence is：First magnetic axis bearing assembly 5 is by interference fit to thrust dish axle 1, the second magnetic axis
Bearing assembly 6 passes through in interference fit to axle 4.The assembly side external diameter of thrust dish axle 1, the external diameter of permanent magnet 3 and the assembly side of axle 4
Outside dimension is bigger than the internal diameter of sheath 2, when deflection caused by specific magnitude of interference centrifugal force according to caused by rotation is with working
The thermal expansion of time calculates, and ensures under maximum speed, sheath 2 is still tightly wales thrust dish axle 1, permanent magnet 3 and axle 4.Dress
With when, sheath 2 can be heated to temperature of the internal diameter more than the external diameter of the external diameter of thrust dish axle 1, the external diameter of permanent magnet 3 and axle 4, so
Afterwards successively assembling axle 4, permanent magnet 3 and thrust dish axle 1 in place, waits the temperature of sheath 2 to reduce after-contraction, you can thrust dish axle
1st, permanent magnet 3 and axle 4 waling tightly, makes an entirety, the positioning step of its axis 4 serves the spacing work of assembling
With.In addition to sheath 2 heats, thrust dish axle 1, permanent magnet 3 and axle 4 can also be cooled by cooling, be allowed to reduce to enter
Luggage is matched somebody with somebody.
Embodiment 2
As shown in figure 3, present embodiment discloses a kind of rotor structure of magnetic suspension ultrahigh speed magneto, with embodiment 1
Different places are that the present embodiment axis 4 is made of using permeability magnetic material, and the part that axle 4 contacts with permanent magnet 3 is hollow knot
Structure, and one end away from permanent magnet 3 is using the structure of closing.Axle 4 is axle stretch end, it is necessary to connect load, and some practical occasions need
To use solid relatively good, while the advantages of hollow structure mitigates quality can also be had concurrently.
In addition, sheath 2 is carbon fibre composite, can not because the thermal coefficient of expansion of carbon fibre composite is essentially 0
Assembled by heating, when assembling cooling can only be taken to assemble.
Embodiment 3
As shown in figure 4, present embodiment discloses a kind of rotor structure of magnetic suspension ultrahigh speed magneto, with embodiment 1
Different places are, the present embodiment axis 4 is made of non-magnet material, its generally solid construction.Axle 4 is using non-magnetic
Material, permanent magnet leakage field can be made smaller.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, without departing from the inventive concept of the premise, can also make some improvements and modifications, these improvements and modifications also should be regarded as
In protection scope of the present invention.Although the present invention is disclosed as above with embodiment, it is not limited to the protection of the present invention
Scope, any technical staff for being familiar with this technology, in the variation and retouching made without departing from the spirit and scope of the invention,
Protection scope of the present invention all should be belonged to.
Claims (9)
- A kind of 1. rotor structure of magnetic suspension ultrahigh speed magneto, it is characterised in that including thrust dish axle, sheath, permanent magnet, Axle, the first magnetic axis bearing assembly, the second magnetic axis bearing assembly, the thrust dish axle are made up of left-hand axis and thrust disc, the thrust disc For solid construction；The part that thrust dish axle contacts with permanent magnet is hollow structure；The permanent magnet is cylindrical structural.
- 2. a kind of rotor structure of magnetic suspension ultrahigh speed magneto as claimed in claim 1, it is characterised in that described pushes away The side of power dish axle is set with the first magnetic axis bearing assembly, the thrust dish axle and the first magnetic bearing component touch position, the first magnetic axis Bearing assembly is circular ring structure, and the first magnetic axis bearing assembly is assembled with thrust dish axle by interference fit.
- 3. a kind of rotor structure of magnetic suspension ultrahigh speed magneto as claimed in claim 2, it is characterised in that described first Magnetic axis bearing assembly by silicon steel sheet stack into.
- A kind of 4. rotor structure of magnetic suspension ultrahigh speed magneto as described in claims 1 to 3 is any, it is characterised in that The first magnetic axis bearing assembly is identical with the structure of the second magnetic axis bearing assembly, and the second magnetic axis bearing assembly is radial direction magnetic bearing component, The second magnetic axis bearing assembly is connected with permanent magnet, also includes position limiting structure on the second magnetic axis bearing assembly.
- A kind of 5. rotor structure of magnetic suspension ultrahigh speed magneto as described in claims 1 to 3 is any, it is characterised in that Described permanent magnet is SmCo or neodymium iron boron, and magnetizing direction is vertical with the axis of permanent magnet.
- A kind of 6. rotor structure of magnetic suspension ultrahigh speed magneto as described in claims 1 to 3 is any, it is characterised in that The sheath is annulus cylindricality, and material is non-magnet_conductible material.
- A kind of 7. rotor structure of magnetic suspension ultrahigh speed magneto as claimed in claim 6, it is characterised in that described shield The material of set is titanium alloy, inconel718 or carbon fiber.
- A kind of 8. rotor structure of magnetic suspension ultrahigh speed magneto as described in claims 1 to 3 is any, it is characterised in that The axle is made up of permeability magnetic material, and one end that the axle contacts with permanent magnet is hollow structure.
- A kind of 9. rotor structure of magnetic suspension ultrahigh speed magneto as described in claims 1 to 3 is any, it is characterised in that The thrust dish axle is made up of high-yield strength magnetic conductive metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720445754.7U CN206790233U (en) | 2017-04-26 | 2017-04-26 | A kind of rotor structure of magnetic suspension ultrahigh speed magneto |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720445754.7U CN206790233U (en) | 2017-04-26 | 2017-04-26 | A kind of rotor structure of magnetic suspension ultrahigh speed magneto |
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| CN206790233U true CN206790233U (en) | 2017-12-22 |
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| CN201720445754.7U Active CN206790233U (en) | 2017-04-26 | 2017-04-26 | A kind of rotor structure of magnetic suspension ultrahigh speed magneto |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108462270A (en) * | 2018-03-06 | 2018-08-28 | 华中科技大学 | A kind of high speed permanent magnet motor rotor structure of shell-less |
| CN109768687A (en) * | 2019-01-23 | 2019-05-17 | 北京智拓博科技有限公司 | A kind of permanent magnet machine rotor and its manufacturing method and motor and air blower |
| WO2020134509A1 (en) * | 2018-12-25 | 2020-07-02 | 珠海格力电器股份有限公司 | Motor rotor, compressor and air conditioning device |
-
2017
- 2017-04-26 CN CN201720445754.7U patent/CN206790233U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108462270A (en) * | 2018-03-06 | 2018-08-28 | 华中科技大学 | A kind of high speed permanent magnet motor rotor structure of shell-less |
| WO2020134509A1 (en) * | 2018-12-25 | 2020-07-02 | 珠海格力电器股份有限公司 | Motor rotor, compressor and air conditioning device |
| CN109768687A (en) * | 2019-01-23 | 2019-05-17 | 北京智拓博科技有限公司 | A kind of permanent magnet machine rotor and its manufacturing method and motor and air blower |
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 300457 tower C, No.90, 12th Street, economic and Technological Development Zone, Tanggu District, Tianjin Patentee after: TIANJIN EMAGING HIGH SPEED MOTOR TECHNOLOGY Co.,Ltd. Patentee after: Tianjin Feixuan Technology Co.,Ltd. Address before: 300457 tower C, No.90, 12th Street, economic and Technological Development Zone, Tanggu District, Tianjin Patentee before: TIANJIN EMAGING HIGH SPEED MOTOR TECHNOLOGY Co.,Ltd. Patentee before: TIANJIN EMAGING TECHNOLOGY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |