CN106643453B - Magnetic suspension bearing suspension center method for detecting position - Google Patents
Magnetic suspension bearing suspension center method for detecting position Download PDFInfo
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- CN106643453B CN106643453B CN201610834967.9A CN201610834967A CN106643453B CN 106643453 B CN106643453 B CN 106643453B CN 201610834967 A CN201610834967 A CN 201610834967A CN 106643453 B CN106643453 B CN 106643453B
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- bearing
- magnetic suspension
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- center
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/004—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring coordinates of points
Abstract
Magnetic suspension bearing suspension of the present invention center method for detecting position is related to magnetic suspension field, the magnetic suspension bearing suspension center method for detecting position that damage of the bearing risk is not limited, can reduce by specific bearing designation its purpose is to provide a kind of detection of center.Magnetic suspension bearing suspension of the present invention center method for detecting position, which is included in except protection bearing inner wall, is arranged several given reference positions, and several given reference positions, which are sequentially connected, is capable of forming closed trajectory, and protection bearing inner wall is located inside closed trajectory；Successively using each given reference position as the target position of magnetic suspension bearing rotor axis, applying driving force to magnetic suspension bearing rotor axis makes it rotary motion at least one week in protection bearing inner wall；The actual displacement that detection armature spindle moves in protection bearing inner wall；The position at suspension center is calculated according to the displacement result of detection.
Description
Technical field
The present invention relates to magnetic suspension fields, more particularly to magnetic suspension bearing suspension center method for detecting position.
Background technique
The control of magnetic suspension bearing is as shown in figure 4, give a reference position, the real-time position information of resetting shaft, through position
Given value of current is obtained after setting controller, the given value of current and axis real-time current are fed back makes axis reach reference position through current controller.
Magnetic suspension bearing is by changing the electric current of suspending windings, to change the magnetic force of all directions on magnetic bearing, realizes axis and stablizes
It suspends.It for axis energy stable suspersion and rotates, the selected of the position of stable suspersion is very important, and optimal situation is
Levitation position is the center of motor stator.
For the detection method of center, traditional method is detection manually: such as single given one fixation of a direction
The electric current of size inhales bearing in some extreme position, and position of bearings at this time is denoted as P1, then gives another direction given electricity
Stream, position of bearings at this time are denoted as P2, then in this direction, the center of bearing is are as follows: P=1/2 (P1+P2).
Certainly also there is automatic detection, automatic detection is the process automation that will be detected manually nothing but, such as from a limit position
It sets and is transitioned into another extreme position, wherein detection method is the center based on current control, but based on current control mostly
Position detection, either manually or automatically, when facing the bearing of different model, due to the difference of bearing weight,
When detecting position, needs to manually adjust the maximum value of current amplitude, be just able to achieve the accurate detection of position.So in practical application
In, this method is limited by the model of specific bearing.
Summary of the invention
Based on this, it is necessary to electric for needing the bearing of different model to correspond to different detections when detecting bearing reference position
The problem of stream, provides the magnetcisuspension that a kind of detection of center was not limited by specific bearing designation, be can reduce damage of the bearing risk
Floating axle holds suspension center method for detecting position.
A kind of magnetic suspension bearing suspension center method for detecting position, comprising the following steps:
Several given reference positions are set in protecting, several given reference positions are sequentially connected energy except bearing inner wall
Closed trajectory is enough formed, the protection bearing inner wall is located inside closed trajectory；Successively using each given reference position as magnetic
The target position of suspension bearing rotor axis, applying driving force to magnetic suspension bearing rotor axis rotates it in protection bearing inner wall
Movement at least one week；Detect the actual displacement that the armature spindle moves in protection bearing inner wall；According to the displacement result of detection
Calculate the position at suspension center.
In the step of detecting the actual displacement of the armature spindle during the motion in one of the embodiments, detection
Obtain maximum position coordinate on the maximum position coordinate and minimum position coordinate and Y-direction of armature spindle in the X direction and most
Small position coordinates.
In the step of calculating the position at suspension center according to the displacement result of detection in one of the embodiments, X-direction
On maximum position coordinate and minimum position coordinate midpoint and Y-direction on maximum position coordinate and minimum position coordinate in
Point is magnetic suspension bearing suspension center.
The actual displacement that the armature spindle moves in protection bearing inner wall in one of the embodiments, passes through magnetic suspension
Sensor detection in system.
The sensor setting is circumferentially uniformly set there are four and along magnetic suspension bearing stator in one of the embodiments,
It sets.
The driving force is the electromagnetic force that the suspending windings in magnetic suspension system generate in one of the embodiments,.
The suspending windings are provided with four groups and are circumferentially uniformly distributed along stator in one of the embodiments,.
The shape of the closed trajectory is circle in one of the embodiments,.
The closed trajectory and protection bearing inner wall are concentric in one of the embodiments,.
The shape of the closed trajectory is rectangle or irregular shape in one of the embodiments,.
Above-mentioned magnetic suspension bearing suspension center method for detecting position, when replacing the bearing of different model, without manually changing
Detect electric current, as long as by several given reference positions be set to protection bearing inner wall except and clockwise or counterclockwise according to
The secondary target position as armature spindle, driving force will be generated to armature spindle makes it rotate around protection bearing inner wall, Jin Erjian
Armature spindle actual displacement is surveyed to find out center.The detection method can solve the detection of the position of bearings of all models, and
The mutation that armature spindle will not be subjected to displacement in the detection process greatly reduces the risk of damage of the bearing.
As long as the closed trajectory that reference position is in turn connected to form is located at except protection bearing inner wall, specific track is unrestricted
System can meet position detection requirement for round, rectangle or irregular shape, arbitrary shape.
Detailed description of the invention
Fig. 1 is that the closed trajectory of given reference position in the method for detecting position of magnetic suspension bearing suspension of the present invention center is round
The schematic diagram of shape；
Fig. 2 is the circular closure track that reference position is given in the method for detecting position of magnetic suspension bearing suspension of the present invention center
The concentric schematic diagram with protection bearing；
Fig. 3 is that the closed trajectory of given reference position in the method for detecting position of magnetic suspension bearing suspension of the present invention center is square
The schematic diagram of shape；
Fig. 4 is the control figure of magnetic suspension bearing.
Specific embodiment
As shown in Figure 1, magnetic suspension bearing includes armature spindle 110 and protection bearing 130.Wherein armature spindle 110 is located at protection
In bearing 130.In the course of work of magnetic suspension bearing, armature spindle 110 is at the equilbrium position of suspension, also referred to as refers to
Position.
Magnetic suspension bearing suspension of the present invention center method for detecting position, comprising the following steps:
Several given reference positions 100, several given reference bits are arranged except 130 inner wall of bearing in protecting in step S101
It sets 100 and is sequentially connected and be capable of forming closed trajectory 120, protection 130 inner wall of bearing is located inside closed trajectory 120.
Step S102, successively using each given reference position 100 as the target position of magnetic suspension bearing rotor axis 110,
Applying driving force to magnetic suspension bearing rotor axis 110 makes it rotary motion at least one week in protection 130 inner wall of bearing.
Step S103, the actual displacement that detection armature spindle 110 moves in protection 130 inner wall of bearing.
Step S104 calculates the position at suspension center according to the displacement result of detection.
This method is when replacing the bearing of different model, without manually changing detection electric current, as long as by several given references
Position is set to except protection bearing inner wall and clockwise or counterclockwise successively as the target position of armature spindle, will
Generating driving force to armature spindle makes it rotate around protection bearing inner wall, and then detects armature spindle actual displacement to find out centre bit
It sets.The detection method can solve the detection of the position of bearings of all models, and position will not occur for armature spindle in the detection process
The mutation of shifting greatly reduces the risk of damage of the bearing.
One embodiment wherein, in step S103, detection obtains the maximum position coordinate of armature spindle 110 in the X direction
XMaxWith minimum position coordinate XMinAnd the maximum position coordinate Y in Y-directionMaxWith minimum position coordinate YMin。
Maximum position coordinate X in step S104, in X-directionMaxWith minimum position coordinate XMinMidpoint and Y-direction on
Maximum position coordinate YMaxWith minimum position coordinate YMinMidpoint be magnetic suspension bearing suspension center, i.e.,
Further, the actual displacement that armature spindle 110 moves in protection 130 inner wall of bearing is by being arranged in magnetic suspension system
Sensor (not shown) detection in system, there are four sensor settings and is circumferentially uniformly arranged along stator.
Further, driving force is the electromagnetic force that the suspending windings 140 in magnetic suspension system generate, and suspending windings 140 are set
It is equipped with four groups and is circumferentially uniformly distributed along stator.
In one of the embodiments, as shown in Figure 1, the closed trajectory 120 of given reference position 100 is circle, in order to
Facilitate discussion, the circular trace for setting given reference position 100 is to justify 1, i.e. the track of circle of dotted line in Fig. 2；Protect bearing 130
Inner wall shape is circle 2, i.e., the track of solid overstriking line.It is in practice most when the center of circle 1 and circle 2 is not overlapped
Common situation.
Preferably, as shown in Fig. 2, that is, round 1 and round 2 be concentric circles when circle 1 and the center of circle 2 are overlapped
When, the automatic situation for detecting position is optimal.It is then as follows in the detection position operational process of optimum:
Firstly, by several given reference positions 100 be set in protection 130 inner wall of bearing except, give reference position 100 according to
Secondary connection is capable of forming closed trajectory, and under the action of current controller and positioner, armature spindle 110 has towards given ginseng
The trend for examining position 100 (outside protection bearing) movement, certainly due to the limitation of protection bearing 130, the physical location of armature spindle 110
It will no longer change, and reach the extreme position of armature spindle 110 at this time, location information is recorded by sensor；Thus, work as Fig. 2
In clockwise or counterclockwise successively using each target position for determining reference position as magnetic suspension bearing rotor axis 110 when, turning
Under the limitation of trend and protection bearing 130 that sub- axis 110 is moved to given reference position 100, in given reference position 100
When converting one week clockwise or counterclockwise, actual rotor axis 110 has rolled one week also along protection 130 inner wall of bearing, so as to
To go out armature spindle 110 in X, the extreme position of Y-direction by sensor measurement, and then extrapolate center.
If the location information of X-direction two limit positions is denoted as X in circle 21、X2, the location information of Y-direction two limit positions is
For Y1、Y2, central coordinate of circle is (a, b).Then justifying 1 track can be represented by the formula:
(x-a)2+(y-b)2=r2
Then running track of round 1 X-coordinate and Y coordinate about time t are as follows:
Then, when several given reference positions 100 are located at above-mentioned track, t is successively used as the target position of armature spindle 110 at any time
When setting, armature spindle 110 is rolled also along protection 130 inner wall of bearing.The quantity setting of given reference position 100 is more, adjacent to give
It is just smaller to determine the distance between reference position 100, more can guarantee armature spindle 110 always and against protection 130 inner wall of bearing rolling.?
While armature spindle 110 is rolled along protection 130 inner wall of bearing, armature spindle 110 is recorded in real time by sensor in X-direction and the side Y
To location information, by comparing, obtain X-direction maximum position coordinate be XMax, minimum position coordinate is XMin, Y-direction
Maximum position coordinate is YMax, minimum position coordinate is YMin, then center position coordinates are as follows:
In another embodiment, as shown in figure 3, the closed trajectory 120 that the connection of given reference position 100 is formed is square
The detection method of shape, detection method and above-mentioned circular trace is almost the same.Since armature spindle 110 has towards given reference position
100 movement trend and protection bearing 130 limitation under, the physical location of armature spindle 110 will be seated against protection bearing 130 in
Wall reaches capacity position, and the position of real-time detection armature spindle 110 in protection 130 inner wall rotary course of bearing of armature spindle 110 is believed
Breath just can obtain center by comparing with calculating.As long as therefore given reference position 100, which meets, is located at protection bearing 130
Except inner wall, the center of the given energy accurately measure protection bearing 130 in the reference position of arbitrary trajectory.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of magnetic suspension bearing suspension center method for detecting position, which comprises the following steps:
Several given reference positions are set in protecting, several given reference positions are sequentially connected being capable of shape except bearing inner wall
At closed trajectory, the protection bearing inner wall is located inside closed trajectory；
Successively using each given reference position as the target position of magnetic suspension bearing rotor axis, magnetic suspension bearing rotor axis is applied
Driving force is added to make it rotary motion at least one week in protection bearing inner wall；
Detect the actual displacement that the armature spindle moves in protection bearing inner wall；
The position at suspension center is calculated according to the displacement result of detection.
2. magnetic suspension bearing suspension according to claim 1 center method for detecting position, which is characterized in that detection is described to be turned
In the step of sub- axis actual displacement during the motion, detection obtains armature spindle maximum position coordinate in the X direction and most
Maximum position coordinate and minimum position coordinate on small position coordinates and Y-direction.
3. magnetic suspension bearing suspension according to claim 2 center method for detecting position, which is characterized in that according to detection
Displacement result calculated in the step of position at suspension center, the midpoint of maximum position coordinate and minimum position coordinate in X-direction
Midpoint with maximum position coordinate and minimum position coordinate in Y-direction is magnetic suspension bearing suspension center.
4. magnetic suspension bearing suspension according to claim 2 center method for detecting position, which is characterized in that the armature spindle
The actual displacement moved in protection bearing inner wall passes through the sensor detection in magnetic suspension system.
5. magnetic suspension bearing suspension according to claim 4 center method for detecting position, which is characterized in that the sensor
There are four settings and is circumferentially uniformly arranged along stator.
6. magnetic suspension bearing suspension according to claim 1 center method for detecting position, which is characterized in that the driving force
The electromagnetic force generated for the suspending windings in magnetic suspension system.
7. magnetic suspension bearing suspension according to claim 6 center method for detecting position, which is characterized in that it is described suspend around
Group is provided with four groups and is circumferentially uniformly distributed along stator.
8. magnetic suspension bearing suspension according to claim 1 center method for detecting position, which is characterized in that the closure rail
The shape of mark is circle.
9. magnetic suspension bearing suspension according to claim 8 center method for detecting position, which is characterized in that the closure rail
Mark and protection bearing inner wall are concentric.
10. magnetic suspension bearing suspension according to claim 1 center method for detecting position, which is characterized in that the closure
The shape of track is rectangle or irregular shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610834967.9A CN106643453B (en) | 2016-09-20 | 2016-09-20 | Magnetic suspension bearing suspension center method for detecting position |
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| CN201610834967.9A CN106643453B (en) | 2016-09-20 | 2016-09-20 | Magnetic suspension bearing suspension center method for detecting position |
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| CN106643453B true CN106643453B (en) | 2019-01-29 |
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| CN110068297B (en) * | 2018-01-23 | 2020-10-27 | 中国航发商用航空发动机有限责任公司 | Method and system for measuring central displacement of cylindrical surface |
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| GB2310499A (en) * | 1996-02-24 | 1997-08-27 | Glacier Metal Co Ltd | Rotor arrangement including axial displacement rate transducer |
| CN101341002A (en) * | 2004-02-26 | 2009-01-07 | 费德罗-莫格尔公司 | Magnetically levitated high-speed spindle for shaping irregular surfaces |
| CN102425553A (en) * | 2011-09-09 | 2012-04-25 | 北京中科科仪技术发展有限责任公司 | Measuring method for rotor suspension center of magnetic suspension molecular pump |
| CN102435135A (en) * | 2011-09-09 | 2012-05-02 | 北京中科科仪技术发展有限责任公司 | Rotor levitation centre determination method for permanent magnet motor-driven maglev molecular pump |
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| CN104458126A (en) * | 2013-09-12 | 2015-03-25 | 珠海格力节能环保制冷技术研究中心有限公司 | Control method and device for magnetic suspension bearing |
| CN105136170A (en) * | 2015-09-08 | 2015-12-09 | 中国人民解放军装备学院 | High precision on-line error compensation method for drift error of gyro with suspension rotor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0198708A (en) * | 1987-10-07 | 1989-04-17 | Ebara Res Co Ltd | Radial magnetic bearing device |
| JPH09303395A (en) * | 1996-05-07 | 1997-11-25 | Nippon Seiko Kk | Magnetic bearing device |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2310499A (en) * | 1996-02-24 | 1997-08-27 | Glacier Metal Co Ltd | Rotor arrangement including axial displacement rate transducer |
| CN101341002A (en) * | 2004-02-26 | 2009-01-07 | 费德罗-莫格尔公司 | Magnetically levitated high-speed spindle for shaping irregular surfaces |
| CN102425553A (en) * | 2011-09-09 | 2012-04-25 | 北京中科科仪技术发展有限责任公司 | Measuring method for rotor suspension center of magnetic suspension molecular pump |
| CN102435135A (en) * | 2011-09-09 | 2012-05-02 | 北京中科科仪技术发展有限责任公司 | Rotor levitation centre determination method for permanent magnet motor-driven maglev molecular pump |
| CN104457555A (en) * | 2013-09-12 | 2015-03-25 | 珠海格力节能环保制冷技术研究中心有限公司 | Shaft suspension center detection method and device for magnetic suspension system |
| CN104458126A (en) * | 2013-09-12 | 2015-03-25 | 珠海格力节能环保制冷技术研究中心有限公司 | Control method and device for magnetic suspension bearing |
| CN105136170A (en) * | 2015-09-08 | 2015-12-09 | 中国人民解放军装备学院 | High precision on-line error compensation method for drift error of gyro with suspension rotor |
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