CN111197969A - Magnetic suspension bearing rotor position detection device - Google Patents
Magnetic suspension bearing rotor position detection device Download PDFInfo
- Publication number
- CN111197969A CN111197969A CN202010013522.0A CN202010013522A CN111197969A CN 111197969 A CN111197969 A CN 111197969A CN 202010013522 A CN202010013522 A CN 202010013522A CN 111197969 A CN111197969 A CN 111197969A
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- positioning
- sensor
- positioning seat
- radial
- position detection
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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
- 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
Abstract
The invention discloses a magnetic suspension bearing rotor position detection device.A support frame is circumferentially provided with an assembly groove for installing a positioning seat; the side wall of the assembling groove close to the rotor is provided with a radial positioning surface, the radial positioning surface is manufactured by machining and has high positioning precision, the positioning seat is provided with a machining surface matched with the radial positioning surface, and the radial positioning surface is used for limiting the radial position of the positioning seat; the positioning seat is used for positioning and installing the sensor, the sensor and the positioning seat form a whole, the sensor is accurately calibrated by taking a reference surface on the positioning seat as a reference, the distance between the detected surface on the rotor and the reference surface is fixed, the output value of the sensor is equal, the relative position between the positioning seat and the supporting frame is only required to be ensured during installation, and the positioning sensor can be quickly replaced.
Description
Technical Field
The invention relates to the technical field of bearings, in particular to a magnetic suspension bearing rotor position detection device.
Background
Magnetic bearings (Magnetic Bearing) use Magnetic force to suspend the rotor in the air without mechanical contact between the rotor and the stator. Compared with the traditional ball bearing, sliding bearing and oil film bearing, the magnetic suspension bearing has no mechanical contact, the rotor can run to a very high rotating speed, and the magnetic suspension bearing has the advantages of small mechanical wear, low noise, long service life, no need of lubrication, no oil pollution and the like, and is particularly suitable for special environments such as high speed, vacuum, ultra-clean and the like.
Usually, a rotor of the bearing is sleeved on a rotating shaft, and the position of the rotor needs to be detected in the operation process of the magnetic suspension bearing, so that the magnetic force is correspondingly adjusted, and the rotor is always kept in a suspension state. Accurate measurement of the rotor position is the key to achieving control of the magnetic bearing.
In the magnetic suspension bearing application field, through setting up the position that displacement sensor detected the rotor, displacement sensor installs on annular mount, and traditional mounting means has two kinds, is fixed and embedment is fixed for the nut respectively, and the nut is fixed to be installed the sensor on the mount through the nut, and the embedment is fixed directly to form wholly with sensor and mount welding.
Because the sensor is very accurate apart from the interval requirement of rotor, consequently when the sensor damages and needs to be changed, traditional sensor connection form can't realize changing conveniently, to technical personnel in this field, how to design a rotor position detection device that can quick replacement position sensor, is the technical problem that needs to solve at present.
Disclosure of Invention
The invention provides a magnetic suspension bearing rotor position detection device, which can quickly replace a positioning sensor and reduce the difficulty of sensor replacement, and the specific scheme is as follows:
a magnetic suspension bearing rotor position detection device comprises a supporting frame and a positioning seat, wherein an assembling groove for installing the positioning seat is formed in the supporting frame along the circumferential direction;
the side wall of the assembling groove close to the rotor is provided with a machined radial positioning surface, the positioning seat is provided with a machined surface matched with the radial positioning surface, and the positioning seat is pressed on the radial positioning surface to limit the radial position;
the positioning seat is used for positioning and mounting a sensor, and the sensor is calibrated relative to a reference surface on the positioning seat.
Optionally, two opposite sides of the assembling groove are provided with machined circumferential positioning surfaces, and the circumferential positioning surfaces are used for limiting the circumferential position of the positioning seat.
Optionally, the radial positioning surface and the circumferential positioning surface are mutually perpendicular planes.
Optionally, a wiring groove for guiding the sensor signal line is provided on a surface of the support frame.
Optionally, the sensor is in threaded connection or glue-pouring fixation with the positioning seat;
and the sensor is in threaded connection with a positioning nut for fixing a position.
Optionally, the supporting frame and the positioning seat are fixed and positioned by bolts.
Optionally, the supporting frame is a closed circular ring, and the assembling groove is a through hole or a blind hole formed in the supporting frame.
The invention discloses a magnetic suspension bearing rotor position detection device.A support frame is circumferentially provided with an assembly groove for installing a positioning seat; the side wall of the assembling groove close to the rotor is provided with a radial positioning surface, the radial positioning surface is machined and has high positioning precision, the positioning seat is provided with a machined reference surface matched with the radial positioning surface, and the radial positioning surface is used for limiting the radial position of the positioning seat; the positioning seat is used for positioning and mounting the sensor, the sensor and the positioning seat form a whole, the sensor is accurately calibrated by taking a reference surface on the positioning seat as a reference, the output detection value of the rotor is equal when the distance between the detected surface and the reference surface is equal, the relative position of the positioning seat and the supporting frame is only required to be ensured during mounting, and the positioning sensor can be quickly replaced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a magnetic bearing rotor position detection device according to the present invention;
FIG. 2A is a block diagram of one embodiment of a positioning stand;
FIG. 2B is a block diagram of one embodiment of a support frame;
FIG. 3A is a schematic view of sensor and positioning seat installation;
FIG. 3B is a schematic diagram of sensor calibration;
fig. 3C is a schematic view illustrating the supporting frame and the positioning seat assembled with each other.
The figure includes:
the device comprises a supporting frame 1, a positioning seat 2, an assembling groove 3, a radial positioning surface 31, a circumferential positioning surface 32, a sensor 4, a positioning nut 41 and a wiring groove 5.
Detailed Description
The core of the invention is to provide a magnetic suspension bearing rotor position detection device, which can quickly replace a positioning sensor and reduce the difficulty of sensor replacement.
In order to make those skilled in the art better understand the technical solution of the present invention, the magnetic bearing rotor position detecting device of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention provides a magnetic suspension bearing rotor position detection device, and fig. 1 is a schematic structural diagram of a specific embodiment of the positioning detection device, wherein the device comprises a support frame 1 and a positioning seat 2 which are relatively fixed and assembled.
The supporting frame 1 is circumferentially provided with an assembling groove 3 for installing the positioning seats 2, each positioning seat 2 corresponds to one assembling groove 3, as shown in fig. 1, four positioning seats 2 are arranged, and each positioning seat 2 is distributed in central symmetry. The supporting frame 1 is sleeved on a rotating shaft which is fixed relative to the magnetic suspension bearing rotor, and the two ends of the rotating shaft are respectively provided with the positioning detection device, so that the position of the rotor is reflected by detecting the position of the rotating shaft; of course, it is also possible to fix the support frame 1 relative to the stator of the magnetic bearing, so that the position of the rotor is detected directly.
The side wall of the assembling groove 3 close to the rotor is provided with a machined radial positioning surface 31, and the positioning seat 2 is provided with a machined reference surface matched with the radial positioning surface 31, as shown in fig. 2A, which is a structural diagram of a specific embodiment of the positioning seat 2, wherein a represents the reference surface; the two machined surfaces can be relatively and accurately attached; during assembly, the machine reference surface of the positioning seat 2 is pressed on the radial positioning surface 31, so as to position the radial position of the sensor 4, wherein the radial direction is a direction towards the symmetry center; the radial position of the positioning socket 2 is defined by the radial positioning surface 31, so that a specific distance is maintained between the positioning socket 2 and the rotor.
The positioning seat 2 is used for positioning and mounting a sensor 4, a probe of the sensor 4 and a reference surface on the positioning seat 2 are fixed relatively and can be calibrated in advance, and when the distance between the detected surface on the rotor and the reference surface is constant, the output values of the sensors are equal. The sensor 4 and the positioning seat 2 are not required to be accurately installed, the sensor and the positioning seat can be quickly installed, and the sensor 4 and the positioning seat 2 are calibrated during installation; the detection accuracy of the sensor is realized by calibration based on the reference surface.
As shown in fig. 3A, the installation of the sensor 4 and the positioning seat 2 is schematically illustrated; the sensor 4 and the positioning seat 2 are installed in the first step, the distance between the probe end part of the sensor 4 and the reference surface A of the positioning seat 2 is L, and the L has low requirement on installation accuracy.
FIG. 3B is a schematic diagram of sensor calibration; the second step is sensor calibration, for example: when the distance between the calibration disc X and the datum plane of the mounting seat is L1, the calibration sensor outputs 0V, when the distance is L2, the calibration sensor outputs 10V, L2-L1 are 1mm, the distance and the output are in a linear relation, 1um corresponds to 10mV, when the distance between the probe of the sensor 4 and the datum plane is L1+100um, the output is 1V, and the like. Each sensor is calibrated so as to ensure that the output of the sensor is the same for any probe as long as the distance between the detection surface and the reference surface of the mounting seat is the same. The traditional sensor is calibrated by taking the probe end part as a calibration reference surface, but the probe end part cannot be used as an installation reference, and the sensor is calibrated by introducing a positioning seat 2 and taking the reference surface on the positioning seat as the calibration reference.
As shown in fig. 3C, it is a schematic view of the principle of assembling the supporting frame 1 and the positioning seat 2 with each other; and thirdly, assembling the mounting seat and the supporting frame, and matching the two reference surfaces, so that the output of the sensor is the same as long as the distance L4 between the detected surface and the reference surface is the same, the interchangeability of the sensor is realized, and the distance L3 between the sensor 4 and the detected surface does not need to be considered.
The positioning seat 2 is arranged on the supporting frame 1, and the sensor usually retracts by 0.5mm when the positioning seat is arranged, so that the sensor is prevented from being damaged by a rotor; the sensor probe is oriented toward the rotor. On the basis of the above scheme, two opposite sides of the assembling groove 3 are provided with machined circumferential positioning surfaces 32, and the circumferential positioning surfaces 32 are used for limiting the circumferential position of the positioning seat 2, as shown in fig. 2B, and are a structural diagram of a specific embodiment of the supporting frame 1; the uppermost assembly groove 3 in fig. 2B is taken as an example for explanation, the sidewall of the lowermost assembly groove 3 is a radial positioning surface 31, the sidewalls of the left and right sides are circumferential positioning surfaces 32, the radial positioning surfaces 31 are used for defining the vertical position of the positioning seat 2, the circumferential positioning surfaces 32 are used for defining the horizontal position of the positioning seat 2, the position of the positioning seat 2 is uniquely determined, two opposite positioning seats 2 are ensured to be located on the same diameter passing through the symmetry center, the symmetry degree of the positioning seat 2 is ensured, and the possible deviation in the detection process is reduced.
Furthermore, in the present invention, the radial positioning surface 31 and the circumferential positioning surface 32 are disposed as mutually perpendicular planes to facilitate processing, but it is also possible that the radial positioning surface 31 and the circumferential positioning surface 32 are formed as arc surfaces or other irregular shapes, and these specific embodiments are all included in the protection scope of the present invention.
As shown in fig. 1 and fig. 2B, a wiring groove 5 for guiding a signal line of the sensor 4 is disposed on the surface of the supporting frame 1, the wiring groove 5 is a strip-shaped concave structure disposed on the surface of the supporting frame 1, and the signal line connected to the sensor 4 can be sunk into the wiring groove 5, so as to guide and position the signal line and prevent the signal line from protruding out of the surface of the supporting frame 1.
On the basis of any one of the technical schemes and the mutual combination thereof, the sensor 4 and the positioning seat 2 are connected by threads or fixed by glue pouring, external threads can be arranged on the sensor 4 during threaded connection, an internal thread hole is arranged on the positioning seat 2, and the sensor 4 is in threaded connection with the positioning seat 2; a positioning nut 41 for fixing the position is connected to the sensor 4 through threads, the positioning nut 41 is connected to one end, opposite to the probe, of the sensor 4, and the positioning nut 41 can be pressed on the surface of the positioning seat 2; when the sensor is installed, the sensor 4 is firstly in threaded connection with the positioning seat 2, after the sensor 4 is fixed with the positioning seat 2, the positioning nut 41 is in threaded connection with the sensor 4, the positioning nut 41 is pressed on the positioning seat 2, and the sensor 4 is fixed.
In addition, other fixing forms, such as welding or bonding, may be used between the sensor 4 and the positioning seat 2.
Preferably, the supporting frame 1 and the positioning seat 2 are fixed and positioned by bolts, the bolt connection includes two forms, the first form is that two threaded holes can be symmetrically arranged on the machining surface a of the positioning seat 2 relative to the sensor 4, two through holes are arranged at opposite positions of the supporting frame 1, the bolts penetrate through the through holes and are connected in the threaded holes in a threaded manner, and the positioning seat 2 and the radial positioning surface 31 are pressed tightly by the tensile force of the bolts.
In the second method, a threaded hole can be formed in one side of the supporting frame 1 opposite to the radial positioning surface 31, a bolt is screwed in and then abuts against the positioning seat 2, and the machining surface a on the positioning seat 2 and the radial positioning surface 31 are pressed relatively through the thrust of the bolt.
As shown in fig. 2B, the supporting frame 1 of the present invention is preferably configured as a closed circular ring, the assembling groove 3 is a through hole formed on the supporting frame 1, besides the through hole, the assembling groove 3 can also be configured as a blind hole, and these specific embodiments are all included in the protection scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The magnetic suspension bearing rotor position detection device is characterized by comprising a support frame (1) and a positioning seat (2), wherein an assembly groove (3) for installing the positioning seat (2) is formed in the support frame (1) along the circumferential direction;
the side wall of the assembling groove (3) close to the rotor is provided with a machined radial positioning surface (31), the positioning seat is provided with a machined surface matched with the radial positioning surface (31), and the positioning seat (2) is pressed on the radial positioning surface (31) to limit the radial position;
the positioning seat (2) is used for positioning and mounting a sensor (4), and the sensor (4) is calibrated relative to a reference surface on the positioning seat (2).
2. Magnetic bearing rotor position detection device according to claim 1, characterized in that opposite sides of the assembly groove (3) are provided with machined circumferential positioning surfaces (32), the circumferential positioning surfaces (32) being used for defining the circumferential position of the positioning seat (2).
3. Magnetic bearing rotor position detection apparatus according to claim 2, characterized in that the radial positioning surface (31) and the circumferential positioning surface (32) are mutually perpendicular planes.
4. Magnetic bearing rotor position detection apparatus according to claim 2, characterized in that a wiring groove (5) for guiding the sensor (4) signal line is provided on the surface of the support frame (1).
5. The magnetic bearing rotor position detection device according to any one of claims 1 to 4, characterized in that the sensor (4) is screwed or fixed with the positioning seat (2) by glue;
and a positioning nut (41) for fixing the position is connected to the sensor (4) in a threaded manner.
6. The magnetic bearing rotor position detection device of claim 5, characterized in that the support frame (1) and the positioning seat (2) are fixed in position by bolts.
7. The magnetic bearing rotor position detection device of claim 6, characterized in that the support frame (1) is a closed circular ring shape, and the assembly groove (3) is a through hole or a blind hole formed on the support frame (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010013522.0A CN111197969B (en) | 2020-01-07 | 2020-01-07 | Magnetic suspension bearing rotor position detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010013522.0A CN111197969B (en) | 2020-01-07 | 2020-01-07 | Magnetic suspension bearing rotor position detection device |
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| Publication Number | Publication Date |
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| CN111197969A true CN111197969A (en) | 2020-05-26 |
| CN111197969B CN111197969B (en) | 2021-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010013522.0A Active CN111197969B (en) | 2020-01-07 | 2020-01-07 | Magnetic suspension bearing rotor position detection device |
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| CN (1) | CN111197969B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112240944A (en) * | 2020-12-17 | 2021-01-19 | 天津飞旋科技有限公司 | Test system, test method, and computer-readable storage medium |
| CN113188817A (en) * | 2021-04-25 | 2021-07-30 | 中车永济电机有限公司 | Auxiliary platform for control and development of superconducting electric suspension propulsion system |
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| CN112240944A (en) * | 2020-12-17 | 2021-01-19 | 天津飞旋科技有限公司 | Test system, test method, and computer-readable storage medium |
| CN113188817A (en) * | 2021-04-25 | 2021-07-30 | 中车永济电机有限公司 | Auxiliary platform for control and development of superconducting electric suspension propulsion system |
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| Publication number | Publication date |
|---|---|
| CN111197969B (en) | 2021-06-22 |
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