CN113432565B - Magnetic suspension bearing axial displacement detection device, method and system and control system thereof - Google Patents
Magnetic suspension bearing axial displacement detection device, method and system and control system thereof Download PDFInfo
- Publication number
- CN113432565B CN113432565B CN202110843925.2A CN202110843925A CN113432565B CN 113432565 B CN113432565 B CN 113432565B CN 202110843925 A CN202110843925 A CN 202110843925A CN 113432565 B CN113432565 B CN 113432565B
- Authority
- CN
- China
- Prior art keywords
- detection surface
- displacement
- axial displacement
- magnetic suspension
- detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 220
- 238000001514 detection method Methods 0.000 title claims abstract description 177
- 239000000725 suspension Substances 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title abstract description 23
- 239000000523 sample Substances 0.000 claims abstract description 15
- 238000005339 levitation Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 240000006829 Ficus sundaica Species 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention provides a magnetic suspension bearing axial displacement detection device, method, system and control system thereof, wherein the device comprises: the magnetic suspension rotor, the first detection surface, the second detection surface, the first displacement sensor and the second displacement sensor; the first detection surface and the second detection surface are respectively and independently arranged on the magnetic suspension rotor; the first displacement sensor is used for detecting the displacement of the first detection surface as a first axial displacement; the second displacement sensor is used for detecting the displacement of the second detection surface as a second axial displacement; the first detection surface and the second detection surface are on the same plane; the positions of the probes of the first displacement sensor and the second displacement sensor are kept on the same vertical line. The scheme provided by the invention can stably obtain the axial displacement signal and can ensure the accuracy of the axial displacement.
Description
Technical Field
The invention relates to the field of control, in particular to a magnetic suspension bearing axial displacement detection device, method and system and a control system thereof.
Background
In a traditional magnetic suspension bearing control system, a controller obtains a displacement signal of a shaft in a mode of obtaining the distance between a displacement sensor probe and a detection surface through a displacement sensor, and changes electromagnetic force generated by a coil by changing the current of a bearing coil, so that stable suspension of a rotor in the axial direction is realized. Due to the structural design of the magnetic suspension motor, the detection surface of the axial displacement sensor cannot be integrated with the rotor and can only be arranged on the rotor. When the magnetic suspension bearing system operates, the rotor generates heat and vibrates due to high-speed rotation, and the condition that the detection surface of the sensor moves back and forth due to looseness may occur. In this case, the axial displacement signal obtained in the above manner is inconsistent with the actual axial position of the rotor, and the bearing control system controls the axial displacement signal, which may cause the position of the stable suspension center of the rotor to shift. Too large offset can cause system instability, cause axial collision, cause protection bearing wear, and especially cause more serious damage when the system runs at high speed.
Fig. 2 shows a manner of acquiring axial displacement by a conventional magnetic bearing control system, which uses an axial displacement sensor and a detection surface to acquire axial displacement information. The acquisition mode and the device are simple and save space and cost, but when the detection surface is loosened, the axial displacement detection fault cannot be judged.
Disclosure of Invention
The invention mainly aims to overcome the defects of the prior art and provides a magnetic suspension bearing axial displacement detection device, method, system and control system thereof, so as to solve the problem that the axial displacement detection fault cannot be judged when a detection surface is loosened in the prior art.
The invention provides a magnetic suspension bearing axial displacement detection device on one hand, which comprises: the magnetic suspension rotor, the first detection surface, the second detection surface, the first displacement sensor and the second displacement sensor; the first detection surface and the second detection surface are respectively and independently arranged on the magnetic suspension rotor; the first displacement sensor is used for detecting the displacement of the first detection surface as a first axial displacement; the second displacement sensor is used for detecting the displacement of the second detection surface as a second axial displacement; the first detection surface and the second detection surface are on the same plane; the positions of the probes of the first displacement sensor and the second displacement sensor are kept on the same vertical line.
Optionally, the method further comprises: the first detection surface is a circular detection surface which is sleeved on the magnetic suspension rotor and is concentric with the cross section of the magnetic suspension rotor; the second detection surface is an annular detection surface which is sleeved on the magnetic suspension rotor and is concentric with the cross section of the magnetic suspension rotor; the inner circle radius of the annular detection surface of the second detection surface is larger than the radius of the circular detection surface of the first detection surface.
The invention also provides a method for detecting the axial displacement of the magnetic suspension bearing, which is used for any one of the devices for detecting the axial displacement of the magnetic suspension bearing, and comprises the following steps: when a control system of the magnetic suspension bearing operates, acquiring a first axial displacement detected by the first displacement sensor and a second axial displacement detected by the second displacement sensor; judging whether the absolute value of the displacement difference value of the first axial displacement and the first axial displacement is larger than a preset allowable error or not; and if the absolute value of the displacement difference is judged to be less than or equal to the preset allowable error, calculating the average value of the first axial displacement and the second axial displacement to be used as the axial displacement of the magnetic suspension bearing.
Optionally, the method further comprises: and if the absolute value of the displacement difference is judged to be larger than the preset allowable error, determining that the first detection surface or the second detection surface deviates.
The invention also provides a magnetic suspension bearing axial displacement detection system, which is used for any one of the magnetic suspension bearing axial displacement detection devices, and comprises: an acquisition unit, configured to acquire a first axial displacement detected by the first displacement sensor and a second axial displacement detected by the second displacement sensor when a control system of the magnetic bearing is running; the judging unit is used for judging whether the absolute value of the displacement difference value of the first axial displacement and the first axial displacement is larger than a preset allowable error or not; and the calculating unit is used for calculating the average value of the first axial displacement and the second axial displacement to be used as the axial displacement of the magnetic suspension bearing if the judging unit judges that the absolute value of the displacement difference is smaller than or equal to the preset allowable error.
Optionally, the method further comprises: and the determining unit is used for determining that the first detection surface or the second detection surface deviates if the absolute value of the displacement difference is judged to be larger than the preset allowable error.
The invention further provides a magnetic suspension bearing control system which comprises the magnetic suspension bearing axial displacement detection device.
According to the technical scheme of the invention, two axial displacement sensors are used for respectively detecting two axial detection surfaces, the two acquired axial displacement signals are compared, and if one detection surface is loosened, the axial displacement detection fault can be timely judged.
According to the technical scheme of the invention, the displacement signal of the shaft can be stably acquired, the accuracy of axial displacement can be ensured, the problem that the axial displacement signal is not accurately acquired to cause system control errors is prevented, the safety problem of system instability caused by the inaccurate axial displacement detection is effectively avoided, the damage of axial collision is avoided, and the stability of the bearing control system is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a magnetic suspension bearing axial displacement detection device of the present invention;
FIG. 2 shows a magnetic bearing axial displacement detecting apparatus in the related art;
FIG. 3 shows the relative position of the detecting surface of the axial displacement detecting device of the magnetic suspension bearing and the magnetic suspension rotor in the related art is changed;
FIG. 4 is a schematic method diagram of an embodiment of the method for detecting the axial displacement of the magnetic suspension bearing provided by the invention;
FIG. 5a shows the change of the relative position of the first detection surface of the magnetic bearing axial displacement detection device of the present invention and the magnetic suspension rotor;
FIG. 5b shows the change of the relative position of the second detection surface of the magnetic bearing axial displacement detection device of the present invention and the magnetic levitation rotor;
FIG. 6 is a schematic diagram of a method for detecting axial displacement of a magnetic suspension bearing according to an embodiment of the present invention;
fig. 7 is a structural block diagram of an embodiment of the detection system for axial displacement of a magnetic suspension bearing provided by the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 2 and 3 show a conventional axial displacement detection device for a magnetic suspension bearing. As shown in fig. 2, the apparatus includes a magnetically levitated rotor 1, an axial displacement sensing surface 2 and an axial displacement sensor 3. As shown in fig. 3, when the detection surface of the device loosens by m, the bearing control system determines that the rotor is offset by m. In order to keep the rotor at the reference position constant, i.e. to keep the distance 3 between the displacement sensor 2 and the detection surface at s, the rotor is displaced in the axial direction by a deviation of m distances, which results in a deviation of the actual reference center position from the set reference position by a deviation of m distances.
Fig. 2 shows the situation when the detection surface is not loose, at this time, the system sets the distance between the sensor and the detection surface 2 to be s, the rotor is stably suspended, and the control system controls the distance between the sensor and the detection surface to be s. Fig. 2 shows the situation that the detection surface 2 loosens leftwards, the loosening amount is m, at the moment of loosening, the distance between the sensor 3 and the detection surface is s', and the system sets the distance between the sensor and the detection surface to be s, at this moment, the system can mistakenly assume that the rotor deviates rightwards by m, in order to keep the distance between the sensor and the detection surface to be s, the control system can control the rotor to deviate leftwards by m, and at this moment, the actual stable suspension position of the rotor changes. According to the control strategy, when the detection surface loosens on the rotor, the rotor can be mistakenly deviated by the amount of the loosening of the detection surface, and the stable suspension position of the rotor can be mistakenly deviated.
Fig. 1 is a schematic structural diagram of a device for detecting axial displacement of a magnetic suspension bearing of the invention. As shown in fig. 1, the magnetic levitation rotor 1, the first detection surface 21, the second detection surface 22, the first displacement sensor 31, and the second displacement sensor 32; the first detection surface 21 and the second detection surface 22 are respectively and independently installed on the magnetic suspension rotor 1; the first displacement sensor 31 is configured to detect a displacement of the first detection surface 21 as a first axial displacement; the second displacement sensor 32 is configured to detect a displacement of the second detection surface 22 as a second axial displacement; the first detection surface 21 and the second detection surface 22 are on the same plane; the positions of the probes of the first displacement sensor 31 and the second displacement sensor 32 are maintained on the same vertical line. In addition, the first detection surface 21 and the second detection surface 22 are on the same vertical plane, so that any looseness of the two detection surfaces can not affect the other detection surface.
The first detection surface 21 is a circular detection surface which is sleeved on the magnetic suspension rotor 1 and is concentric with the cross section of the magnetic suspension rotor 1; the second detection surface 22 is an annular detection surface which is sleeved on the magnetic suspension rotor 1 and is concentric with the cross section of the magnetic suspension rotor 1; the annular inner diameter of the second detection surface 22 is larger than the circular radius of the first detection surface 21.
As shown in fig. 1, the first detection surface 21 is a circular detection surface, which is sleeved on the magnetic suspension rotor 1 and is concentric with the cross section (i.e. cylindrical cross section) of the magnetic suspension rotor 1; the second detection surface 22 is an annular detection surface, is sleeved on the magnetic suspension rotor 1 and is concentric with the cross section of the magnetic suspension rotor 1; the annular inner diameter of the second detection surface 22 is larger than the circular radius of the first detection surface 21. The second detection surface 21 is similar to an annular cylinder with the same inner diameter as the rotor, a groove is dug out, the second detection surface is fixedly sleeved on the magnetic suspension rotor 1, and the space of the groove can accommodate the first detection surface 21. The principle of placing the two detection surfaces is that the first detection surface 21 and the second detection surface 22 must be kept on the same plane.
The first displacement sensor 31 and the second displacement sensor 32 are vertically fixed in parallel, and the probes of the first displacement sensor 31 and the second displacement sensor 32 are maintained on the same vertical line. The first displacement sensor 31 and the second displacement sensor 32 keep a certain distance, so that the probe of the first displacement sensor 31 always acquires displacement signals between the probe and the first detection surface 21; the probe of the second displacement sensor 32 always acquires a displacement signal from the second detection surface 22.
The invention also provides a method for detecting the axial displacement of the magnetic suspension bearing. The method is used for the device for detecting the axial displacement of the magnetic suspension bearing.
Fig. 4 is a schematic method diagram of an embodiment of the method for detecting the axial displacement of the magnetic suspension bearing provided by the invention.
As shown in fig. 4, according to an embodiment of the present invention, the detection method includes at least step S110, step S120, and step S130.
Step S110, when the control system of the magnetic suspension bearing operates, acquiring a first axial displacement detected by the first displacement sensor and a second axial displacement detected by the second displacement sensor.
When the magnetic suspension bearing control system operates, the detection device starts to work. The first displacement sensor 21 starts to acquire the displacement signal s1, i.e. the first axial displacement, with the first detection surface 31; the second displacement sensor 22 starts acquiring the displacement signal s2 with the second detection surface 32, i.e. the second axial displacement.
Step S120, determining whether an absolute value of a displacement difference between the first axial displacement and the first axial displacement is greater than a preset allowable error.
Theoretically | s1-s2| ═ 0, but since it is impossible to ensure that the first detection surface 21 and the second detection surface 22 are in absolutely the same vertical plane and it is also impossible to ensure that the probe of the first displacement sensor 31 is in the same vertical line as the probe of the second displacement sensor 32 during mounting, there is an inevitable tolerance T. After obtaining s1 and s2, it is calculated and judged whether | s1-s2| is larger than the preset allowable error T.
Step S130, if it is determined that the absolute value of the displacement difference is smaller than or equal to the preset allowable error, calculating an average value of the first axial displacement and the second axial displacement to be used as the axial displacement of the magnetic suspension bearing.
If | s1-s2| < ═ T, the first detection surface 21 and the second detection surface 22 do not have the loosening phenomenon, the obtained displacement information is accurate, and at the moment, the average value s of s1 and s2 is reflected as the actual axial position.
Further, as shown in fig. 4, the method for detecting the axial displacement of the magnetic bearing further includes step S140.
Step S140, if the absolute value of the displacement difference is greater than the preset allowable error, it is determined that the first detection surface or the second detection surface is shifted.
If | s1-s2| > T, it indicates that the relative position of the first detection surface 21 or the second detection surface 22 and the magnetic levitation rotor 1 changes at this time, and the loosening of the distance m occurs, which can be specifically referred to fig. 5a and 5b, where fig. 5a shows that the relative position of the first detection surface and the magnetic levitation rotor changes; fig. 5b shows a change in the relative position of the second detection surface and the magnetically levitated rotor. At this point the system has not been able to accurately obtain the actual position of the magnetic levitation rotor 1, and to avoid risk, the system should be stopped immediately.
For clearly explaining the technical solution of the present invention, an implementation flow of the magnetic suspension bearing axial displacement detection method of the magnetic suspension bearing axial displacement detection apparatus provided by the present invention is described below with an embodiment.
Fig. 6 is a schematic method diagram of an embodiment of the axial displacement detection method of a magnetic suspension bearing provided by the invention. As shown in fig. 6, when the magnetic bearing control system operates, the first displacement sensor starts to acquire a displacement signal s1 between the first displacement sensor and the first detection surface; the second displacement sensor starts acquiring a displacement signal s2 with the second detection surface. The first detection surface and the second detection surface are on the same vertical plane, the positions of the probes of the first displacement sensor and the second displacement sensor are kept on the same vertical line, and theoretically | s1-s2| ═ 0, but because the first detection surface and the second detection surface are not ensured to be on the same absolute vertical plane and the probes of the first displacement sensor and the second displacement sensor are not ensured to be on the same vertical line in the installation process, an inevitable allowable error T exists; and after obtaining s1 and s2, calculating whether | s1-s2| is larger than T, if | s1-s2| < ═ T, showing that the first detection surface and the second detection surface have no looseness, and obtaining accurate displacement information, wherein the average value s of s1 and s2 is reflected as an actual axial position. If | s1-s2| > T. As shown in fig. 4, it is explained that the relative position of the first detection surface or the second detection surface and the magnetic levitation rotor changes at this time, and the looseness of the distance m occurs, at this time, the system cannot accurately acquire the actual position of the rotor, and in order to avoid the risk, the system should be stopped immediately.
The invention also provides a system for detecting the axial displacement of the magnetic suspension bearing. The detection system is used for the detection device for the axial displacement of the magnetic suspension bearing.
Fig. 7 is a structural block diagram of an embodiment of the detection system for axial displacement of a magnetic suspension bearing provided by the invention. As shown in fig. 7, the detection system 100 includes an acquisition unit 110, a judgment unit 120, and a calculation unit 130.
The obtaining unit 110 is configured to obtain a first axial displacement detected by the first displacement sensor and a second axial displacement detected by the second displacement sensor when the control system of the magnetic suspension bearing is running.
When the magnetic suspension bearing control system operates, the detection device starts to work. The first displacement sensor 21 starts to acquire the displacement signal s1, i.e. the first axial displacement, with the first detection surface 31; the second displacement sensor 22 starts acquiring the displacement signal s2 with the second detection surface 32, i.e. the second axial displacement.
The determining unit 120 is configured to determine whether an absolute value of a displacement difference between the first axial displacement and the first axial displacement is greater than a preset allowable error.
Theoretically | s1-s2| ═ 0, but since it is impossible to ensure that the first detection surface 21 and the second detection surface 22 are in absolutely the same vertical plane and it is also impossible to ensure that the probe of the first displacement sensor 31 is in the same vertical line as the probe of the second displacement sensor 32 during mounting, there is an inevitable tolerance T. After obtaining s1 and s2, it is calculated and judged whether | s1-s2| is larger than the preset allowable error T.
The calculating unit 130 is configured to calculate an average value of the first axial displacement and the second axial displacement to serve as the axial displacement of the magnetic suspension bearing if the determining unit determines that the absolute value of the displacement difference is smaller than or equal to the preset allowable error.
If | s1-s2| < ═ T, the first detection surface 21 and the second detection surface 22 do not have the loosening phenomenon, the obtained displacement information is accurate, and at the moment, the average value s of s1 and s2 is reflected as the actual axial position.
Further, as shown in fig. 7, the system for detecting the axial displacement of the magnetic bearing further includes a determination unit 140.
The determining unit 140 is configured to determine that the first detection surface or the second detection surface deviates if the absolute value of the displacement difference is greater than the preset allowable error.
If | s1-s2| > T, it indicates that the relative position of the first detection surface 21 or the second detection surface 22 and the magnetic levitation rotor 1 changes at this time, and the loosening of the distance m occurs, which can be specifically referred to fig. 5a and 5b, where fig. 5a shows that the relative position of the first detection surface and the magnetic levitation rotor changes; fig. 5b shows a change in the relative position of the second detection surface and the magnetically levitated rotor. At this point the system has not been able to accurately obtain the actual position of the magnetic levitation rotor 1, and to avoid risk, the system should be stopped immediately.
The invention also provides a magnetic suspension bearing control system corresponding to the magnetic suspension bearing axial displacement detection device, which comprises any one of the magnetic suspension bearing axial displacement detection devices.
Therefore, according to the scheme provided by the invention, two axial displacement sensors are used for respectively detecting two axial detection surfaces, the two acquired axial displacement signals are compared, and if one detection surface is loosened, the axial displacement detection fault can be timely judged.
According to the technical scheme of the invention, the displacement signal of the shaft can be stably acquired, the accuracy of axial displacement can be ensured, the problem that the axial displacement signal is not accurately acquired to cause system control errors is prevented, the safety problem of system instability caused by the inaccurate axial displacement detection is effectively avoided, the damage of axial collision is avoided, and the stability of the bearing control system is improved.
The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the invention and the following claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or a combination of any of these. In addition, each functional unit may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and the parts serving as the control device may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (6)
1. A magnetic suspension bearing axial displacement detection device is characterized by comprising: the magnetic suspension rotor, the first detection surface, the second detection surface, the first displacement sensor and the second displacement sensor; the first detection surface and the second detection surface are respectively and independently arranged on the magnetic suspension rotor; the first displacement sensor is used for detecting the displacement of the first detection surface as a first axial displacement; the second displacement sensor is used for detecting the displacement of the second detection surface as a second axial displacement; the first detection surface and the second detection surface are on the same plane; the positions of the probes of the first displacement sensor and the second displacement sensor are kept on the same vertical line;
the first detection surface is a circular detection surface which is sleeved on the magnetic suspension rotor and is concentric with the cross section of the magnetic suspension rotor; the second detection surface is an annular detection surface which is sleeved on the magnetic suspension rotor and is concentric with the cross section of the magnetic suspension rotor; the inner circle radius of the annular detection surface of the second detection surface is larger than the radius of the circular detection surface of the first detection surface.
2. A magnetic bearing axial displacement detection method using the magnetic bearing axial displacement detection device of claim 1, characterized by comprising:
when a control system of the magnetic suspension bearing operates, acquiring a first axial displacement detected by the first displacement sensor and a second axial displacement detected by the second displacement sensor;
judging whether the absolute value of the displacement difference value of the first axial displacement and the second axial displacement is larger than a preset allowable error or not;
and if the absolute value of the displacement difference is judged to be less than or equal to the preset allowable error, calculating the average value of the first axial displacement and the second axial displacement to be used as the axial displacement of the magnetic suspension bearing.
3. The detection method according to claim 2, further comprising:
and if the absolute value of the displacement difference is judged to be larger than the preset allowable error, determining that the first detection surface or the second detection surface deviates.
4. A magnetic bearing axial displacement detection system using the magnetic bearing axial displacement detection device of claim 1, comprising:
an acquisition unit, configured to acquire a first axial displacement detected by the first displacement sensor and a second axial displacement detected by the second displacement sensor when a control system of the magnetic bearing is running;
the judging unit is used for judging whether the absolute value of the displacement difference value of the first axial displacement and the second axial displacement is larger than a preset allowable error or not;
and the calculating unit is used for calculating the average value of the first axial displacement and the second axial displacement to be used as the axial displacement of the magnetic suspension bearing if the judging unit judges that the absolute value of the displacement difference is smaller than or equal to the preset allowable error.
5. The detection system of claim 4, further comprising:
and the determining unit is used for determining that the first detection surface or the second detection surface deviates if the absolute value of the displacement difference is judged to be larger than the preset allowable error.
6. A magnetic bearing control system, characterized in that it comprises a magnetic bearing axial displacement detection device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110843925.2A CN113432565B (en) | 2021-07-26 | 2021-07-26 | Magnetic suspension bearing axial displacement detection device, method and system and control system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110843925.2A CN113432565B (en) | 2021-07-26 | 2021-07-26 | Magnetic suspension bearing axial displacement detection device, method and system and control system thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113432565A CN113432565A (en) | 2021-09-24 |
| CN113432565B true CN113432565B (en) | 2022-03-15 |
Family
ID=77761818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110843925.2A Active CN113432565B (en) | 2021-07-26 | 2021-07-26 | Magnetic suspension bearing axial displacement detection device, method and system and control system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113432565B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114659438B (en) * | 2022-05-20 | 2022-08-05 | 山东华东风机有限公司 | Detection device and detection method for differential displacement sensor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3919436B2 (en) * | 2000-09-13 | 2007-05-23 | 株式会社荏原製作所 | Magnetic levitation rotating machine |
| CN1210507C (en) * | 2003-11-14 | 2005-07-13 | 清华大学 | Method for measuring axial displacement of electromagnet bearing rotor |
| CN103196406A (en) * | 2012-01-06 | 2013-07-10 | 上海信慧电力科技有限公司 | Centering instrument measuring device used for generator opposite-wheel shafting |
| CN107968530B (en) * | 2017-12-28 | 2024-03-19 | 南京磁谷科技有限公司 | Integrated mounting structure of radial axial sensor of magnetic suspension motor |
| CN108489371B (en) * | 2018-03-15 | 2020-09-15 | 北京航空航天大学 | Eddy current displacement sensor for axial direction of high-temperature magnetic suspension bearing |
| CN109538630A (en) * | 2018-12-03 | 2019-03-29 | 珠海格力电器股份有限公司 | Motor magnetic suspension bearing control device, motor magnetic suspension bearing control method, motor and compressor |
-
2021
- 2021-07-26 CN CN202110843925.2A patent/CN113432565B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113432565A (en) | 2021-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11306777B2 (en) | Magnetic bearing control apparatus, control method and high speed rotating motor using the same | |
| CN113432565B (en) | Magnetic suspension bearing axial displacement detection device, method and system and control system thereof | |
| CN113374790B (en) | Magnetic suspension rotating shaft reference position detection method and device, medium and bearing controller | |
| CN107725591B (en) | System and method for correcting suspension center position of magnetic suspension bearing | |
| JP6837771B2 (en) | Feed axis abnormality judgment method | |
| US10921108B2 (en) | Method for monitoring a magnetic bearing apparatus | |
| CN115144181B (en) | Bearing multi-dimensional defect detection method and system | |
| CN106643576B (en) | Method and device for measuring non-concentricity | |
| CN105509684A (en) | Detection method, apparatus, and system for axial displacement | |
| EP2781775B1 (en) | Method for detecting changes of position of shaftless spinning rotor of open-end spinning machine in cavity of active magnetic bearing and spinning unit of open-end spinning machine with active magnetic bearing for bearing shaftless spinning rotor | |
| CN112697434A (en) | Bearing fault detection method and system for intelligent spindle | |
| EP3379198B1 (en) | Method and system for detecting bend in rotating shaft of magnetic bearing | |
| CN107869949B (en) | Axial displacement detection method and device and axial displacement sensor | |
| CN108809154B (en) | Novel magnetic suspension high-speed motor and method for detecting motor rotor position | |
| CN111197969A (en) | Magnetic suspension bearing rotor position detection device | |
| US20240186867A1 (en) | Method of Determining Runout | |
| WO2017084604A1 (en) | Axial displacement detection method, device and system | |
| CZ2011588A3 (en) | Method of determining actual eccentricity of a rotating rotor and rotating rotor eccentricity diagnostics | |
| CN117092434A (en) | Method and device for detecting magnetic suspension system, magnetic suspension system and storage medium | |
| CN113217540B (en) | Magnetic bearing axial suspension position self-correction system and method | |
| JP2000508415A (en) | Fluid bearing including means for monitoring capacitance between rotor and stator | |
| CN110048555A (en) | Method for monitoring magnetic bearing apparatus | |
| JP2017219098A (en) | Rotation synchronous phase detection device and magnetic bearing device | |
| CN108826392B (en) | Real-time impeller detection system and method for range hood | |
| EP2375221B1 (en) | Encoder and condition monitoring thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |