CN218380845U - Magnetic bearing and electric eddy current sensor thereof - Google Patents
Magnetic bearing and electric eddy current sensor thereof Download PDFInfo
- Publication number
- CN218380845U CN218380845U CN202121084398.3U CN202121084398U CN218380845U CN 218380845 U CN218380845 U CN 218380845U CN 202121084398 U CN202121084398 U CN 202121084398U CN 218380845 U CN218380845 U CN 218380845U
- Authority
- CN
- China
- Prior art keywords
- current sensor
- eddy current
- circuit board
- top wall
- winding
- 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
Images
Abstract
The utility model provides a magnetic bearing and eddy current sensor thereof, this eddy current sensor includes: the winding comprises a shell, a winding support, a circuit board, a lead and epoxy resin; the shell is in a cap shape and is provided with a top wall and an accommodating cavity positioned below the top wall, the winding is arranged on the winding support and is welded on the circuit board, the lead is welded on the circuit board and is led out downwards, the epoxy resin is filled in the accommodating cavity, and the separated structural parts are packaged into a whole. The eddy current sensor is small in size, sensitive in detection, high in positioning accuracy and suitable for being installed and used in narrow space.
Description
Technical Field
The utility model relates to an eddy current sensor, in particular to eddy current sensor suitable for magnetic bearing.
Background
The eddy current sensor can statically and dynamically measure the distance between a measured metal conductor and the surface of the probe in a non-contact manner, high linearity and high resolution manner. The linear non-contact measuring instrument is a non-contact linear measuring instrument and can accurately measure static and dynamic relative displacement changes between a measured body made of a metal conductor material and the end surface of a probe. The magnetic bearing comprises a stator and a rotor, wherein the rotor is fixed with a rotating shaft, the stator is fixed on a shell, and the rotor is suspended at the center of the stator through control. The eddy current sensor is used for detecting the radial offset of the rotor and feeding back the radial offset to a control circuit of the eddy current sensor. The existing eddy current sensor is generally formed by polytetrafluoroethylene in an over-molding mode and then connected with a coaxial cable, and the existing eddy current sensor is fixed on a base mainly through threaded connection. The structure occupies a large space and is not suitable for occasions with high requirements on space.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, the utility model provides an eddy current sensor, it is small, survey the sensitivity, positioning accuracy is high, is fit for using at narrow and small space installation.
The utility model provides a technical scheme that its technical problem adopted includes: an eddy current sensor is provided, including: the winding comprises a shell, a winding support, a circuit board, a lead and epoxy resin; the shell is in a cap shape and is provided with a top wall and an accommodating cavity positioned below the top wall, the winding is arranged on the winding support and is welded on the circuit board, the lead is welded on the circuit board and is led out downwards, the epoxy resin is filled in the accommodating cavity, and the separated structural parts are packaged into a whole.
Wherein, the bottom of the shell is provided with a positioning flange outwards in a protruding way.
The winding support is in a cap shape and is provided with a top wall, a positioning boss protruding upwards from the center of the top wall, and a plurality of side walls protruding downwards from the outer edge of the top wall.
Wherein, the outer edges of the side walls are in transition fit with the inner side wall of the shell.
The circuit board is circular, and the inner edges of the side walls are in transition fit with the outer side wall of the circuit board.
Wherein, this circuit board facial make-up is equipped with temperature sensitive component for detect the ambient environmental temperature.
Wherein the conductor is a shielded wire.
The utility model provides a technical scheme that its technical problem adopted still includes: there is provided a magnetic bearing comprising a rotor and a stator cooperating with each other and an eddy current sensor as described above secured with the stator.
Compared with the prior art, the utility model discloses an eddy current sensor passes through shell, winding support, circuit board, wire and epoxy's ingenious cooperation, and is small, surveys sensitively, and positioning accuracy is high, is fit for using at narrow and small space installation.
Drawings
Fig. 1 is an exploded perspective view of the eddy current sensor of the present invention.
Fig. 2 is an exploded sectional view of the eddy current sensor of the present invention.
Fig. 3 is a schematic three-dimensional structure of the winding support in the eddy current sensor of the present invention.
Wherein the main reference numerals are as follows: 10. eddy current sensor, 1, shell, 13, roof, 15, accept the chamber, 17, inside wall, 19, location flange, 2, winding, 21, centre bore, 25, pin, 3, winding support, 31, roof, 33, location boss, 35, lateral wall, 351, inside edge, 353, outside edge, 37, breach, 4, circuit board, 43, outside edge, 45, weld the hole, 5, wire, 6, temperature sensitive component, 7, epoxy.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Fig. 1 is an exploded perspective view of the eddy current sensor of the present invention. Fig. 2 is an exploded sectional view of the eddy current sensor of the present invention. Fig. 3 is a schematic three-dimensional structure of the winding support in the eddy current sensor of the present invention. The utility model provides an eddy current sensor 10 that is fit for using on magnetic bearing, it includes: the winding comprises a shell 1, a winding 2, a winding support 3, a circuit board 4, a lead 5, a temperature-sensitive element 6 and epoxy resin 7.
The housing 1 is cap-shaped and has a top wall 13 and a receiving cavity 15 below the top wall 13. The bottom end of the housing 1 is provided with a positioning flange 19 projecting outwardly. The housing chamber 15 is defined by an inner wall 17 and an inner side of the top wall 13. It will be appreciated that the housing 15 is cylindrical and the main body of the housing 1 (i.e. the part other than the locating flange 19 corresponding to the visor) is cylindrical.
With this configuration of the housing 1, the eddy current sensor 10 can be mounted with a transition or clearance fit via the outer cylindrical surface of the housing 1 and a cylindrical hole (not shown) of the mounting seat, and can be axially positioned via the positioning flange 19 of the housing 1.
The winding 2 is circular, has a central hole 21 and extends downwards with two pins 25.
The winding frame 3 is in the shape of a cap having a top wall 31, a positioning boss 33 projecting upward from the center of the top wall 13, and four side walls 35 projecting downward from the outer edge of the top wall 13. Four notches 37 are symmetrically formed in the top wall 31. Each side wall 35 has an inner side edge 351 and an outer side edge 353. For example, the winding frame 3 is made of teflon, but is not limited to this material, and may be other materials such as polyetheretherketone.
It will be appreciated that the inner edges 351 of the four side walls 35 are on the same cylindrical surface, and the outer edges 353 of the four side walls 35 are also on the same cylindrical surface. The positioning boss 33 is cylindrical and has an inclined guide 331 formed at the tip. The positioning boss 33 is correspondingly matched with the central hole 21 on the winding 2, so that the axial positioning of the winding 2 on the winding support 3 can be realized (the bottom side surface of the winding 2 is attached to the top side surface of the top wall 31). The legs 25 of the winding 2 extend downwardly by the relief of the notches 37.
It is worth mentioning that the outer edges 353 of the four side walls 35 are in transitional engagement with the inner side walls 17 of the housing 1.
The circuit board 4 is circular with an outer edge 43 that is transition fitted to the inner edge 351 of the winding frame 3 and has solder holes 45 that are fitted to the pins 25.
The leads 5 are soldered to the bottom side of the circuit board 4 and extend rearwardly therefrom. For example, the lead 5 is a shielded wire, which is beneficial to improving the anti-interference capability.
The temperature sensitive element 6 is mounted on the bottom side of the circuit board 4 for detecting the ambient temperature. For example, the temperature sensitive element 6 is a temperature sensitive resistor. It can be understood that the temperature-sensitive element 6 can detect the temperature of the eddy current sensor 10 in real time, which is beneficial to the subsequent circuit or software algorithm to perform temperature compensation, and improve the temperature stability of the eddy current sensor 10.
The epoxy resin 7 is filled in the accommodating cavity 15 to integrally package each separated structural member.
The utility model discloses an eddy current sensor 10, ingenious cooperation through shell 1, winding 2, winding support 3, circuit board 4, wire 5 and epoxy 7, small, it is sensitive to survey, and positioning accuracy is high, is fit for using in narrow and small space installation.
It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and that such modifications and substitutions are intended to be included within the scope of the appended claims.
Claims (8)
1. An eddy current sensor, comprising: the winding comprises a shell, a winding support, a circuit board, a lead and epoxy resin; the shell is in a cap shape and is provided with a top wall and an accommodating cavity positioned below the top wall, the winding is arranged on the winding support and is welded on the circuit board, the lead is welded on the circuit board and is led out downwards, the epoxy resin is filled in the accommodating cavity, and the separated structural parts are packaged into a whole.
2. An eddy current sensor according to claim 1, wherein the bottom end of the housing is provided with a positioning flange projecting outwardly.
3. The eddy current sensor according to claim 1, wherein the winding support is in the shape of a cap having a top wall, a positioning boss protruding upward from the center of the top wall, and a plurality of side walls protruding downward from the outer edge of the top wall.
4. The eddy current sensor of claim 3, wherein the outer edges of the side walls transition fit with the inner side walls of the housing.
5. The eddy current sensor according to claim 3, wherein the circuit board is circular, and the inner edges of the side walls transition fit with the outer side wall of the circuit board.
6. An eddy current sensor according to any one of claims 1 to 5, wherein a temperature sensitive element is mounted on the circuit board for detecting the ambient temperature.
7. An eddy current sensor according to any one of claims 1 to 5, characterised in that the wire is a shielded wire.
8. A magnetic bearing comprising a rotor and a stator cooperating with each other, further comprising an eddy current sensor as claimed in any one of claims 1 to 7 secured to the stator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121084398.3U CN218380845U (en) | 2021-05-19 | 2021-05-19 | Magnetic bearing and electric eddy current sensor thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121084398.3U CN218380845U (en) | 2021-05-19 | 2021-05-19 | Magnetic bearing and electric eddy current sensor thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218380845U true CN218380845U (en) | 2023-01-24 |
Family
ID=84951767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121084398.3U Active CN218380845U (en) | 2021-05-19 | 2021-05-19 | Magnetic bearing and electric eddy current sensor thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218380845U (en) |
-
2021
- 2021-05-19 CN CN202121084398.3U patent/CN218380845U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5581179A (en) | Hall-effect ferrous-article-proximity sensor assembly | |
| US6107924A (en) | High frequency type sensing device | |
| US11422050B2 (en) | Temperature-pressure integrated sensor with improved assembly and processing | |
| US4981039A (en) | Liquid level gauge | |
| CN204388770U (en) | For current vortex sensor and the turning gear of rotating shaft | |
| CN218380845U (en) | Magnetic bearing and electric eddy current sensor thereof | |
| CN204240938U (en) | Current vortex sensor | |
| US4325259A (en) | Vibration amplitude measuring device | |
| JPH11108605A (en) | Non-contact linear displacement sensor | |
| US6289731B1 (en) | Liquid level detector | |
| CN213090676U (en) | Magnetostrictive displacement sensor | |
| CN111434942B (en) | Flywheel energy storage device, magnetic bearing and eddy current sensor assembly thereof | |
| CN209727978U (en) | A kind of fixed device and the velocity sensor using the fixation device | |
| JP2009236797A (en) | Liquid level detector | |
| CN212621010U (en) | Fuel level sensor | |
| CN211183722U (en) | Magnetic encoder and motor | |
| CN220893405U (en) | Eddy current sensor and motor | |
| CN213714200U (en) | Magnetic displacement sensor | |
| CN205748247U (en) | A kind of CMPS Camshaft Position Sensor | |
| CN221571636U (en) | Bellows type weighing sensor | |
| CN110995229A (en) | Hall proximity switch structure | |
| CN210051284U (en) | TO56 laser pipe cap concentricity detects anchor clamps | |
| CN219935729U (en) | Smell sensor | |
| CN220171235U (en) | Rotary laser radar | |
| CN221804131U (en) | Current sensor module and electronic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |