CN215375225U - Device for detecting rotor magnetic steel of permanent magnet motor by adopting magnetorheological fluid - Google Patents
Device for detecting rotor magnetic steel of permanent magnet motor by adopting magnetorheological fluid Download PDFInfo
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- CN215375225U CN215375225U CN202121669345.8U CN202121669345U CN215375225U CN 215375225 U CN215375225 U CN 215375225U CN 202121669345 U CN202121669345 U CN 202121669345U CN 215375225 U CN215375225 U CN 215375225U
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- rotor
- magnetorheological fluid
- permanent magnet
- magnet motor
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Abstract
The utility model discloses a device for detecting rotor magnetic steel of a permanent magnet motor by adopting magnetorheological fluid, which comprises a ring sleeve sleeved on the outer side of the rotor magnetic steel of the permanent magnet motor, wherein detection units which are uniformly arranged are arranged on the inner side of the ring sleeve; the detection unit comprises a magnetic isolation wall, a balloon is arranged in the magnetic isolation wall, and the magnetorheological fluid is arranged in the balloon; a pressure sensor is arranged at the top of the balloon, a pressure head is arranged above the pressure sensor, and the upper end of the pressure head is abutted against the inner side of the balloon; the outer side of the air bag is provided with a locking ring. The utility model has the advantages that: the balloon and the pressure head apply pressure to the balloon filled with the magnetorheological fluid, and the pressure of the detection unit at the defect is different from the pressure at the normal position because the magnetic field at the defect position is different from the magnetic field at the normal position; and the computer can detect the position and the type of the defect by combining the position information of the rotor through the change value of the pressure.
Description
Technical Field
The utility model relates to the field of machinery, in particular to a manufacturing technology of a motor, and more particularly relates to a detection device of a motor rotor.
Background
The rotor of the permanent magnet synchronous motor is provided with a fixed magnetic pole, and the installation and detection of the fixed magnetic pole are directly related to the performance of the motor; for the prior art, there are few detection methods for non-planar permanent magnetic materials, and for example, chinese patent application No. 201710888019.8 discloses a method for detecting material profile defects having both arc-shaped edges and linear edges, an optical detection method, and specifically a detection method designed to detect surface unfilled corners of an arc-shaped magnetic material. The linear edge part and the arc-shaped edge part are separated, and corresponding contour defect detection methods are respectively provided, so that the problem of surface contour defect detection of the material with the arc-shaped edge is solved. The method is an automatic optical detection method for detecting the unfilled corner of the surface profile of the arc-shaped magnetic material, which is simple, rapid and effective to operate, and can meet the actual detection requirement. The method needs precise instruments and complex calculation and is not suitable for the practical production of the motor rotor.
Disclosure of Invention
In order to solve the technical problems, the utility model aims to provide a device for detecting rotor magnetic steel of a permanent magnet motor by using magnetorheological fluid, which comprises a ring sleeve sleeved on the outer side of the rotor magnetic steel of the permanent magnet motor, wherein the inner side of the ring sleeve is provided with uniformly arranged detection units; the detection unit comprises a magnetic isolation wall, a balloon is arranged in the magnetic isolation wall, and the magnetorheological fluid is arranged in the balloon; a pressure sensor is arranged at the top of the balloon, a pressure head is arranged above the pressure sensor, and the upper end of the pressure head is abutted against the inner side of the balloon; the outer side of the air bag is provided with a locking ring.
The pressure sensor is connected with the signal conversion module; the pressure sensor is of a diaphragm type.
The detection units are arranged neatly along the axial direction and the circumferential direction of the inner side of the ring sleeve.
From the radial view of the ring sleeve, the magnetism isolating wall is rectangular, and the saccule is correspondingly rectangular.
The signal conversion module is connected with the upper computer.
The locking rings are multiple and are arranged along the axial direction of the air bag.
The pressure head comprises a plate-shaped pressing sheet, a columnar handle is fixed on the pressing sheet, and the end part of the columnar handle is hemispherical; the pressing sheet is abutted to the pressure sensor, and the end part of the columnar handle is abutted to the air bag.
The magnetism isolating walls of each detection unit are symmetrically arranged.
The utility model has the advantages that: the method is characterized in that the magnetorheological fluid shows the characteristic of non-Newtonian fluid under the action of an external magnetic field, the free flowing liquid is changed into semisolid or even solid within millisecond time, strong controllable rheological characteristic is shown, the outer surface of a rotor is provided with a plurality of transverse and longitudinal detection units, each detection unit is provided with a magnetic isolation wall, the mutual interference and the influence of the magnetic field of the rotor at adjacent positions are avoided, an external air bag and a pressure head are utilized to apply pressure to a ball bag filled with the magnetorheological fluid, and the magnetic field at the position of a defect is different from the magnetic field at the position of a normal position, so the pressure of the detection unit at the position of the defect is different from the pressure at the position of the normal position; and the computer can detect the position and the type of the defect by combining the position information of the rotor through the change value of the pressure.
Drawings
FIG. 1 is a schematic view of the external appearance of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is an enlarged view of portion A of FIG. 1;
fig. 4 is a schematic view of the arrangement of the detecting unit on the outer side of the loop.
Detailed Description
The utility model is described in detail with reference to the accompanying drawings, as shown in the figures, the utility model comprises a ring sleeve 2 sleeved outside a permanent magnet motor rotor magnetic steel 1, and the ring sleeve can be made of elastic materials such as nylon; the inner side of the ring sleeve is provided with detection units which are uniformly arranged; the detection unit comprises a magnetic isolation wall 4, a balloon 5 is arranged in the magnetic isolation wall, and the magnetorheological fluid is arranged in the balloon 5; a pressure sensor 7 is arranged at the top of the balloon 5, a pressure head 6 is arranged above the pressure sensor 7, and the upper end of the pressure head 6 is abutted against the inner side of the balloon 3; the locking ring 8 is arranged on the outer side of the air bag.
The pressure sensor is connected with the signal conversion module;
preferably, the pressure sensor is of the diaphragm type.
The signal conversion module is connected with the upper computer; in order to facilitate positioning on a computer (an upper computer), the detection units are orderly arranged along the axial direction and the circumferential direction of the inner side of the ring sleeve; this facilitates comparison with the rotor profile and dimensions entered beforehand.
As shown in fig. 4, from the radial view of the collar, the magnetic barrier wall is rectangular, and the balloon is correspondingly rectangular.
In order to ensure the uniform force application of the air bag, the locking rings are multiple and are arranged along the axial direction of the air bag.
Preferably, the pressing head 6 comprises a plate-shaped pressing sheet 61, on which a cylindrical handle 62 is fixed, the end of the cylindrical handle is hemispherical 63; the pressing sheet is abutted to the pressure sensor, and the end part of the columnar handle is abutted to the air bag. The magnetism isolating walls of each detection unit are symmetrically arranged.
The principle of the utility model is as follows: sleeving the ring on the excircle of the rotor, then buckling the buckle of the locking ring, inflating the air bag, and inflating the air bag to push the pressure head to press down the air bag; because the magnetic fields of the rotor positions corresponding to each detection unit are different, the magneto-rheological fluid has different hardening degrees, and the pressure sensor receives pressure and converts the pressure into an electric signal to be transmitted to the signal conversion module and finally input to the upper computer; and the upper computer judges the magnetic field state of the rotor according to the change of the pressure value of each position and by comparing the change with a preset standard magnetic field.
In the utility model, the magnetorheological fluid can adopt a commercial product, such as a product of Shenzhen Eisake lubricating material Co., Ltd; the pressure sensor can be a product of Shenzhen Bofengsheng electronics Limited.
Claims (8)
1. The utility model provides an adopt magnetorheological suspensions to detect device of permanent-magnet machine rotor magnet steel which characterized in that: the detection device comprises a ring sleeve sleeved on the outer side of a permanent magnet motor rotor magnetic steel, wherein detection units which are uniformly arranged are arranged on the inner side of the ring sleeve; the detection unit comprises a magnetic isolation wall, a balloon is arranged in the magnetic isolation wall, and the magnetorheological fluid is arranged in the balloon; a pressure sensor is arranged at the top of the balloon, a pressure head is arranged above the pressure sensor, and the upper end of the pressure head is abutted against the inner side of the balloon; the outer side of the air bag is provided with a locking ring.
2. The device for detecting the magnetic steel of the rotor of the permanent magnet motor by adopting the magnetorheological fluid according to claim 1, is characterized in that: the pressure sensor is connected with the signal conversion module; the pressure sensor is of a diaphragm type.
3. The device for detecting the magnetic steel of the rotor of the permanent magnet motor by adopting the magnetorheological fluid according to claim 1, is characterized in that: the detection units are arranged neatly along the axial direction and the circumferential direction of the inner side of the ring sleeve.
4. The device for detecting the magnetic steel of the rotor of the permanent magnet motor by adopting the magnetorheological fluid according to claim 1, is characterized in that: from the radial view of the ring sleeve, the magnetism isolating wall is rectangular, and the saccule is correspondingly rectangular.
5. The device for detecting the magnetic steel of the rotor of the permanent magnet motor by adopting the magnetorheological fluid according to claim 2, is characterized in that: the signal conversion module is connected with the upper computer.
6. The device for detecting the magnetic steel of the rotor of the permanent magnet motor by adopting the magnetorheological fluid according to claim 1, is characterized in that: the locking rings are multiple and are arranged along the axial direction of the air bag.
7. The device for detecting the magnetic steel of the rotor of the permanent magnet motor by adopting the magnetorheological fluid according to claim 1, is characterized in that: the pressure head comprises a plate-shaped pressing sheet, a columnar handle is fixed on the pressing sheet, and the end part of the columnar handle is hemispherical; the pressing sheet is abutted to the pressure sensor, and the end part of the columnar handle is abutted to the air bag.
8. The device for detecting the magnetic steel of the rotor of the permanent magnet motor by adopting the magnetorheological fluid according to claim 1, is characterized in that: the magnetism isolating walls of each detection unit are symmetrically arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121669345.8U CN215375225U (en) | 2021-07-22 | 2021-07-22 | Device for detecting rotor magnetic steel of permanent magnet motor by adopting magnetorheological fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121669345.8U CN215375225U (en) | 2021-07-22 | 2021-07-22 | Device for detecting rotor magnetic steel of permanent magnet motor by adopting magnetorheological fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215375225U true CN215375225U (en) | 2021-12-31 |
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ID=79611644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121669345.8U Active CN215375225U (en) | 2021-07-22 | 2021-07-22 | Device for detecting rotor magnetic steel of permanent magnet motor by adopting magnetorheological fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215375225U (en) |
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2021
- 2021-07-22 CN CN202121669345.8U patent/CN215375225U/en active Active
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