CN206206406U - A kind of same polar form ends of the earth radial direction electromagnetic suspension bearing - Google Patents
A kind of same polar form ends of the earth radial direction electromagnetic suspension bearing Download PDFInfo
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- CN206206406U CN206206406U CN201621316283.1U CN201621316283U CN206206406U CN 206206406 U CN206206406 U CN 206206406U CN 201621316283 U CN201621316283 U CN 201621316283U CN 206206406 U CN206206406 U CN 206206406U
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- electromagnet
- bearing
- bearing seat
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- magnetic
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Abstract
A kind of same polar form ends of the earth radial direction electromagnetic suspension bearing, including bearing block, stator and rotor, the rotor is located at the endoporus of stator, the stator is made up of eight separate electromagnet, circular arc arranged for interval such as eight electromagnet and on same mounting plane, the eight same polarity magnetic pole of electromagnet radial arrangements on same cross section；The first-class circular arc of inner side endoporus of the bearing block is provided with eight electromagnet mounting grooves, each electromagnet is corresponded with each electromagnet mounting groove, the bearing block is provided with two, respectively first bearing seat and second bearing seat, the electromagnet mounting groove of the second bearing seat is corresponded with the electromagnet mounting groove of the first bearing seat and forms electromagnet installation cavity, the electromagnet be located in the electromagnet installation cavity and with its elastic conjunction, the second bearing seat is fixed together with the first bearing seat.The utility model provides a kind of reduction volume, installs a kind of simple, lower-cost same polar form ends of the earth radial direction electromagnetic suspension bearing.
Description
Technical field
The utility model is related to electromagnetic suspension bearing field, especially a kind of same polar form ends of the earth radial direction electromagnetic suspension bearing.
Background technology
Electromagnetic suspension bearing is by electromagnetic force so that the rotor of bearing is in relative suspension state with stator；Therefore, electricity
Magnetic suspension bearing shows plurality of advantages, for example：Without lubricating, without friction/without abrasion, low noise, suitable for high speed and superelevation
Speed operation occasion.Magnetic suspension bearing in Aero-Space, precision instrument, the field such as high-speed high-precision Digit Control Machine Tool has extensively should
With.
Electromagnetic suspension bearing is broadly divided into three classes：1. passive magnetic bearing 2. active magnetic bearings 3. hybrid magnetic bearing.Electromagnetism hangs
The Electromagnetic Control part that floating axle holds, is the rigidity and damping for controlling magnetic pole to cash by changing the size of current of each magnetic pole.Enter
And adjust the state of rotor.Electromagnetic suspension bearing electric control part is mainly by traditional PID control.So that rotor is steadily transported
OK.
Electromagnetic suspension bearing rotor vibration displacement and vibration velocity detection be it is most be all by current vortex displacement
Sensor and vibrating speed sensors can meet the requirement of detection come what is completed.However, the sensor cost and complexity of costliness
Installation and wiring, later maintenance with calibration predicament vibration displacement detection in propose requirement higher.With electromagnetic suspension
The application from method for sensing and technology of bearing, so as to compensate for eddy current displacement sensor and vibrating speed sensors to magnetic axis
The shortcomings that the system of holding is brought.
The content of the invention
In order to the volume for overcoming the shortcomings of existing magnetic bearing is larger, it is complicated, relatively costly to install, the utility model provides one
Plant and reduce volume, a kind of simple, lower-cost same polar form ends of the earth radial direction electromagnetic suspension bearing is installed.
The utility model solves the technical scheme that its technical problem used：
A kind of same polar form ends of the earth radial direction electromagnetic suspension bearing, including bearing block, stator and rotor, the rotor are located at stator
Endoporus, the stator is made up of eight separate electromagnet, the circular arc arranged for interval such as eight electromagnet and in same peace
In dress plane, two magnetic poles of electromagnet or so are arranged side by side and towards rotor, eight same polarity magnetic poles of electromagnet are same
Radial arrangement on cross section；The first-class circular arc of inner side endoporus of the bearing block is provided with eight electromagnet mounting grooves, each electromagnetism
Iron is corresponded with each electromagnet mounting groove, and the bearing block is provided with two, respectively first bearing seat and second bearing
Seat, the electromagnet mounting groove of the second bearing seat is corresponded with the electromagnet mounting groove of the first bearing seat and forms electricity
Magnet installation cavity, the electromagnet be located at the electromagnet installation cavity in and with its elastic conjunction, the second bearing seat and institute
First bearing seat is stated to be fixed together；
The outside of the first bearing seat, the outside of second bearing seat are installed with bearing (ball) cover respectively.
Further, the inner side of the first bearing seat is provided with exhausted magnetic sun groove, and the inner side of the second bearing seat is provided with
The exhausted magnetic the moon groove being engaged with exhausted magnetic sun groove；The exhausted magnetic sun groove includes the two neighboring electromagnetism for isolating in first bearing seat
The outer one week annular protrusion of raised and positioned at the first bearing seat the eight electromagnet mounting grooves of the cut-off of iron mounting groove, it is described every
The disconnected raised inner side with the annular protrusion is connected；
Exhausted magnetic the moon groove includes the cut-off groove for the two neighboring electromagnet mounting groove isolated in second bearing seat
Annular groove with one week outside eight electromagnet mounting grooves positioned at the second bearing seat, the cut-off groove is recessed with the annular
The inner side connection of groove；
The cut-off projection is connected in the cut-off groove, and the annular protrusion is connected in the annular groove.
Further, the iron core of the electromagnet is made up of silicon steel sheet or permalloy lamination.
Further, the electromagnet mounting groove is T-shaped.
The beneficial effects of the utility model are mainly manifested in：Reduce volume, to install simple, cost relatively low；With polar form structure
With the radial dimension that magnetic bearing is reduced from sensing function, miniaturization structure causes magnetic bearing production standard, engineer applied model
Enclose more extensive.
Brief description of the drawings
Fig. 1 is a kind of explosive view of same polar form ends of the earth radial direction electromagnetic suspension bearing.
Fig. 2 is the structural representation of the stator of Fig. 1.
Fig. 3 is the structural representation of first bearing seat.
Fig. 4 is the structural representation of second bearing seat.
Fig. 5 is a kind of control figure of same polar form ends of the earth radial direction electromagnetic suspension bearing.
Specific embodiment
The utility model is further described below in conjunction with the accompanying drawings.
1~Fig. 5 of reference picture, a kind of same polar form ends of the earth radial direction electromagnetic suspension bearing, including bearing block, stator 13 and rotor,
The rotor is located at the endoporus of stator 13, and the stator 13 is made up of eight separate electromagnet 131, eight electromagnet
131 grade circular arc arranged for interval and on same mounting plane, two magnetic poles of electromagnet 131 or so are arranged side by side and towards turning
Son, the eight same polarity magnetic pole of electromagnet radial arrangements on same cross section；The first-class circular arc of inner side endoporus of the bearing block
Eight electromagnet mounting grooves 2 are provided with, each electromagnet is corresponded with each electromagnet mounting groove, and the bearing block is provided with
Two, respectively first bearing seat 12 and second bearing seat 14, the electromagnet mounting groove of the second bearing seat 14 and described
The electromagnet mounting groove of one bearing block 12 is corresponded and forms electromagnet installation cavity, and the electromagnet 131 is located at the electromagnetism
In iron installation cavity and with its elastic conjunction, the second bearing seat 14 is fixed together with the first bearing seat 12；
The outside of the first bearing seat 12, the outside of second bearing seat 14 are installed with bearing (ball) cover 11 respectively.
Further, the inner side of the first bearing seat 12 is provided with exhausted magnetic sun groove 121, the inner side of the second bearing seat 14
It is provided with the exhausted magnetic the moon groove 141 being engaged with exhausted magnetic sun groove 121；The exhausted magnetic sun groove 121 is included for isolating first bearing seat
The cut-off of the two neighboring electromagnet mounting groove on 12 is raised and outside eight electromagnet mounting grooves of the first bearing seat 12
The annular protrusion of one week, the raised inner side with the annular protrusion of the cut-off is connected；
Exhausted magnetic the moon groove 141 includes the cut-off for the two neighboring electromagnet mounting groove isolated in second bearing seat 14
Groove and the eight electromagnet mounting grooves annular groove of outer a week positioned at the second bearing seat 14, the cut-off groove with it is described
The inner side connection of annular groove；
The cut-off projection is connected in the cut-off groove, and the annular protrusion is connected in the annular groove.
Further, the iron core of the electromagnet 131 is made up of silicon steel sheet or permalloy lamination.
Further, the electromagnet mounting groove 2 is T-shaped.
Operation principle of the present utility model is：Eight pole configurations of electromagnet in the same plane, and uniform alternate point
Cloth, forms juxtaposed same polar form ends of the earth radial direction electromagnetic suspension bearing；Magnetic pole mutually magnetic absolutely so that magnetic flux/magnetic circuit will not mutual shadow
Ring；It is integrated in the utility model in order to reduce the radial dimension of magnetic suspension bearing and improve the stability of magnetic bearing control system
Based on current sensor from sensing technology come instead of the vibration displacement sensor in traditional magnetic bearing；In real time measurement electric current and
Its time rate of change, senses algorithm for estimating to calculate vibration displacement and vibration velocity certainly based on flux change.In same flat
Eight magnetic poles in face are controlled according to the vibration displacement and vibration velocity information that are obtained from sensing algorithm for estimating by magnetic bearing center
Device processed configures electromagnetic damping magnetic pole and ELECTROMAGNETIC STIFFNESS magnetic pole, is utilized respectively vibration displacement and vibration velocity output electromagnetic damping power
With ELECTROMAGNETIC STIFFNESS power, so as to reach magnetic suspension rotor vibration control.
As shown in figure 1, referring to the magnetic pole of electromagnet in same cross section with polar form ends of the earth radial direction electromagnetic suspension bearing
Only a kind of polarity poles, otherwise only N poles, otherwise only S poles；Electromagnet 131 is made up of iron core and magnet coil, electromagnetism
The iron core of iron 131 is formed by silicon steel sheet/permalloy lamination, around upper magnet coil on iron core, it is possible to constitute magnetic suspension magnetic
Pole；The electromagnet installation cavity that first bearing seat 12 and second bearing seat 14 that this elastic conjunction of stator 13 enters aluminium alloy are constituted
Interior, first bearing seat 12 and second bearing seat 14 are connected with screwed hole, are connected by screw locking, and such bearing is closed.
And first bearing seat 12 and second bearing seat 14 are used by the cooperation of negative and positive slot structure with reaching exhausted magnetic, and exhausted magnetic negative and positive groove is as schemed
Shown in 3.So that the mutually exhausted magnetic of eight magnetic poles in same mounting plane, and magnetic leakage free is reached, so as to obtain eight magnetic poles
Independently of one another, mutually without influence.Using this assembling structure, the simplicity of bearing assembling is highlighted.
An external force is subject in working rotor, displacement transducer can obtain the displacement signal of rotor, the displacement signal
Incoming magnetic bearing central controller, is analyzed out by magnetic bearing central controller to it, exports a control signal, should
Control signal controls eight pairs of solenoid currents respectively, wherein four pairs electromagnet is produced controling power, and four pairs produce damping in addition
Power, so that rotor can be by Fast-Balance.
Rotor state in suspending under the Static stiffness support that control magnetic pole is provided, when being acted on by external force, turns
The position of son meeting disalignment, so as to change the length of air gap；Air gap changes can cause magnetic flux to change, magnetic flux hair
Can cause electric current in magnet coil that minor variations occur after changing, current sensor is by detecting electric current in magnet coil
Change, can obtain a current signal relevant with rotor displacement, and HHT conversion is carried out by signal gathering unit, then pass through
The Displacement Estimation device based on magnetic flux conversion from sensing estimator, by the feeding magnetic bearing center control of vibration displacement estimate
Device, and the vibration displacement and vibration velocity of rotor are obtained by the nonlinear differentiator in magnetic bearing central controller, in this
Magnetic bearing central controller is based on FUZZY ALGORITHMS FOR CONTROL can output control data parameters.
Control data parameter includes Control Cooling, control rating and control data；Control Cooling include rigidity type and
Two kinds of damp type, control rating is divided into seven grades of Control granularities and (bears big NB, negative middle NM, negative small NS, zero ZO, just small PS, center
PM, honest PB).
Control signal generator according to control data parameter calculate rotor deviate poised state adjustment size of current (or
The dutycycle of pwm signal).Magnetic suspension rotor takes in the presence of the electromagnetic force (rigidity power or damping force) of corresponding magnet coil
Obtain the stability characteristic (quality) of rotary motion.
Because when rotor disalignment, displacement transducer works with current sensor simultaneously, estimate when from sensing estimator
When the vibration displacement and vibration velocity identical with the value that displacement transducer is detected counted out, displacement transducer does not just need work
Make, and the electric current of current sensor direct detection magnet coil, then estimate by signal gathering unit and from sensing estimator
Go out the vibration displacement and vibration velocity of rotor, magnetic bearing central controller gives power amplifier one electricity by control signal generator
Stream signal, so that the electric current in controlling magnet coil, and then control the balance of rotor.And magnetic bearing central controller before this
In be compared to measuring displacement with displacement transducer from the sensing rotor displacement that measures of estimator, now estimate acquisition from sensing
Displacement signal, be not involved in control, simply with displacement transducer obtain displacement signal be compared.
As shown in figure 5, the dynamic group of Electromagnetic Control ring matches somebody with somebody relation；8 magnetic poles circumferential number consecutively J1, J2, J3 counterclockwise,
J4, J5, J6, J7, J8.8 pole combinations can show as following form：
(1) " 8 pole " support stiffness configuration：J1, J2, J3, J4, J5, J6, J7, J8 show as elastic bearing attribute.
(2) " 8 pole " radially damps configuration：J1, J2, J3, J4, J5, J6, J7, J8 show as damping property.
(3) " 4+4 " magnetic pole dynamically distributes：J1, J3, J5, J7 show as elastic bearing attribute, and J2, J4, J6, J8 is cashed and is
Damping property.
By to solenoid controlled, can be provided in the spatially damping of dynamic rotary and bearing characteristicses；Damping with it is firm
The combining form of degree can because bearing state in which it is different with rotor speed in the case of have different combinations.(1), (2), (3)
Three kinds of control configurations can be by the polymorphic control mode that moves in turn of control realization.For example：" 8 pole " support stiffness --->" 4+4 " magnetic pole
Dynamically distributes --->The circulation of " 8 pole " damping state is moved in turn, so as to show as 8 extremely common radial direction magnetic bearings, rigidity and damping juxtaposition
Magnetic bearing and 8 polar diameters are to electromagnetic damper；Or " 8 pole " support stiffness --->" 4+4 " magnetic pole dynamically distributes move in turn；Or individually
It is the rigidity and damping mixing juxtaposition electromagnetic states of " 4+4 " configuration.
Different size of ELECTROMAGNETIC STIFFNESS power or electromagnetic damping power are provided by controlling the electric current in magnet coil, is that rotor is carried
For suspending stabilized control；The dynamically distributes of rigidity and damping magnetic pole adapt to rotary motion stability contorting from low speed to high speed for rotor
Electromagnetic foundation is provided.
This electromagnetic suspension bearing is to make use of to load on the electric current of magnetic pole and calculate vibration displacement and vibration velocity, from i.e. from
Sensing function.Real-time calculating current and its time rate of change, and based on flux change algorithm for estimating to complete from method for sensing and
Technology；The technology provides rigidity and damping control process offer facility for electromagnetic suspension rotor, in good time the rotation fortune of stabilization rotor
Dynamic characteristic, so that for high-speed motion provides engineer applied basis.
From sensing algorithm is by the microcomputer collection from sensing estimator and measures the electric current for loading on magnetic pole, utilize
One second order linear differential device and HHT (Hilbert-Huang) converters obtain the high-order variation characteristic of electric current, are vibration
Displacement and the quick and accurate detection of vibration velocity provide good guarantee, and then rotation provides guarantor at a high speed for electromagnetic suspension rotor
Barrier.
During Electromagnetic Control, the pole combination of each pairing can require to show as the supporting of bearing respectively because of different control
Stiffness characteristics and damping property, you can real-time damping force and supporting force needed for being dynamically provided to rotor-support-foundation system.
The utility model is magnetic leakage free magnetic resistance between two magnetic poles, improves the magnetic circuit of magnetic pole.In different control configuration or
Person carry out it is polymorphic move in turn control when, structure of the present utility model can greatly improve the Magnetic leakage characteristics between adjacent pole, be firm
The smooth conversion of degree and damping state provides facility.
Claims (4)
1. a kind of same polar form ends of the earth radial direction electromagnetic suspension bearing, including bearing block, stator and rotor, the rotor are located at stator
Endoporus, it is characterised in that：The stator is made up of eight separate electromagnet, the circular arc arranged for interval such as eight electromagnet and
On same mounting plane, two magnetic poles of electromagnet or so are arranged side by side and towards rotor, eight same polarity magnetic of electromagnet
Pole radial arrangement on same cross section；The first-class circular arc of inner side endoporus of the bearing block is provided with eight electromagnet mounting grooves,
Each electromagnet and each electromagnet mounting groove are corresponded, and the bearing block is provided with two, respectively first bearing seat and
Second bearing seat, the electromagnet mounting groove of the second bearing seat is corresponded with the electromagnet mounting groove of the first bearing seat
And form electromagnet installation cavity, the electromagnet be located in the electromagnet installation cavity and with its elastic conjunction, second axle
Bearing is fixed together with the first bearing seat；
The outside of the first bearing seat, the outside of second bearing seat are installed with bearing (ball) cover respectively.
2. a kind of same polar form ends of the earth radial direction electromagnetic suspension bearing as claimed in claim 1, it is characterised in that：The clutch shaft bearing
The inner side of seat is provided with exhausted magnetic sun groove, and the inner side of the second bearing seat is provided with the exhausted magnetic the moon groove being engaged with exhausted magnetic sun groove；
The exhausted cut-off of the magnetic sun groove including the two neighboring electromagnet mounting groove for isolating in first bearing seat is raised and positioned at this
The outer one week annular protrusion of eight electromagnet mounting grooves of first bearing seat, the raised inner side with the annular protrusion of the cut-off
Connection；
Exhausted magnetic the moon groove includes cut-off groove and the position of the two neighboring electromagnet mounting groove for isolating in second bearing seat
In eight electromagnet mounting grooves of second bearing seat annular groove of outer a week, the cut-off groove and the annular groove
Inner side connects；
The cut-off projection is connected in the cut-off groove, and the annular protrusion is connected in the annular groove.
3. a kind of same polar form ends of the earth radial direction electromagnetic suspension bearing as claimed in claim 1 or 2, it is characterised in that：The electromagnetism
The iron core of iron is made up of silicon steel sheet or permalloy lamination.
4. a kind of same polar form ends of the earth radial direction electromagnetic suspension bearing as claimed in claim 1 or 2, it is characterised in that：The electromagnetism
Iron mounting groove is T-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621316283.1U CN206206406U (en) | 2016-12-02 | 2016-12-02 | A kind of same polar form ends of the earth radial direction electromagnetic suspension bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621316283.1U CN206206406U (en) | 2016-12-02 | 2016-12-02 | A kind of same polar form ends of the earth radial direction electromagnetic suspension bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206206406U true CN206206406U (en) | 2017-05-31 |
Family
ID=58752599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621316283.1U Withdrawn - After Issue CN206206406U (en) | 2016-12-02 | 2016-12-02 | A kind of same polar form ends of the earth radial direction electromagnetic suspension bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206206406U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523526A (en) * | 2016-12-02 | 2017-03-22 | 浙江工业大学 | Like-pole-type eight-pole radial electromagnetic suspension bearing |
| CN107327488A (en) * | 2017-08-29 | 2017-11-07 | 南京磁谷科技有限公司 | A kind of mounting seat for being used to tilt magnetic pole in magnetic bearing |
-
2016
- 2016-12-02 CN CN201621316283.1U patent/CN206206406U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523526A (en) * | 2016-12-02 | 2017-03-22 | 浙江工业大学 | Like-pole-type eight-pole radial electromagnetic suspension bearing |
| CN107327488A (en) * | 2017-08-29 | 2017-11-07 | 南京磁谷科技有限公司 | A kind of mounting seat for being used to tilt magnetic pole in magnetic bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170531 Effective date of abandoning: 20180921 |
|
| AV01 | Patent right actively abandoned |