CN210093097U - Magnetic circuit structure for magnetic fluid momentum wheel - Google Patents
Magnetic circuit structure for magnetic fluid momentum wheel Download PDFInfo
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- CN210093097U CN210093097U CN201921227262.6U CN201921227262U CN210093097U CN 210093097 U CN210093097 U CN 210093097U CN 201921227262 U CN201921227262 U CN 201921227262U CN 210093097 U CN210093097 U CN 210093097U
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Abstract
The utility model discloses a magnetic circuit structure for magnetic current body momentum wheel, include the magnetic conduction shell of constituteing by magnetic conduction bowl and magnetic conduction end cover, from the top down has set gradually auxiliary magnet, main magnet and lower auxiliary magnet in the magnetic conduction bowl, and the nestification has a magnetic conduction section of thick bamboo in the main magnet, and magnetic conduction bowl, last auxiliary magnet, main magnet, lower auxiliary magnet and magnetic conduction section of thick bamboo are the hollow cylinder structure. The magnetizing directions of the main magnets are radial, the magnetizing directions of the upper auxiliary magnet and the lower auxiliary magnet are axial, and the magnetizing directions of the upper auxiliary magnet and the lower auxiliary magnet are opposite. The upper auxiliary magnet and the lower auxiliary magnet are the same in shape and size, the inner diameters of the upper auxiliary magnet, the lower auxiliary magnet and the magnetic conduction tube are larger than the inner diameter of the magnetic conduction bowl cavity, the outer diameter of the main magnet is equal to the outer diameter of the magnetic conduction bowl cavity, the inner diameters of the magnetic conduction tube, the upper auxiliary magnet and the lower auxiliary magnet are equal, the outer diameter of the magnetic conduction tube is equal to the inner diameter of the main magnet, and the outer diameters of the upper auxiliary magnet and the lower auxiliary magnet are larger than the outer diameter of the magnetic conduction.
Description
Technical Field
The utility model belongs to the technical field of the momentum wheel and specifically relates to a magnetic circuit structure that is used for magnetic current body momentum wheel is related to.
Background
The momentum wheel is an execution structure of a satellite attitude control system. The magnetic fluid momentum wheel is a novel momentum wheel, adopts conductive fluid to replace a mechanical rotor, generates Lorentz force through an electric field and a magnetic field to accelerate the conductive fluid in a closed annular channel to rotate, and further outputs torque. Compared with the traditional momentum wheel, the magnetic fluid momentum wheel does not contain moving solid parts, has the advantages of large bandwidth, small volume, light weight, long service life, impact resistance, high precision and the like, and is more suitable for attitude control of a small satellite.
The magnetic structure of the magnetic fluid momentum wheel generates a magnetic field in the area where the conductive fluid is located, and provides a driving environment for the momentum wheel. The magnetic field performance is directly related to the working performance of the momentum wheel, and the improvement of the magnetic field strength and the uniformity has great significance for improving the response speed and the nonlinear error of the magnetofluid momentum wheel. The magnetic circuit structure of the existing magnetic fluid momentum wheel consists of a hollow cylindrical permanent magnet which is magnetized in the radial direction and a magnetic conduction shell, the magnetic field uniformity of the magnetic circuit structure is poor, and the nonlinear error of the magnetic fluid momentum wheel adopting the magnetic circuit structure cannot be limited to a lower level.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough among the prior art, provide a magnetic structure that is used for magnetic current body momentum wheel that magnetic induction intensity is big, magnetic field homogeneity is high to improve the response speed and the nonlinear error that magnetic current body momentum takes turns.
The utility model aims at realizing through the following technical scheme:
the utility model provides a magnetic circuit structure for magnetic current body momentum wheel, includes the magnetic conduction shell of compriseing magnetic conduction bowl and magnetic conduction end cover, from the top down has set gradually supplementary magnet, main magnet and lower supplementary magnet in the magnetic conduction bowl, the nestification has a magnetic conduction section of thick bamboo in the main magnet, magnetic conduction bowl, last supplementary magnet, main magnet, lower supplementary magnet and magnetic conduction section of thick bamboo are the hollow cylinder structure.
Furthermore, the magnetizing direction of the main magnet is radial, the magnetizing directions of the upper auxiliary magnet and the lower auxiliary magnet are both axial, and the magnetizing directions of the upper auxiliary magnet and the lower auxiliary magnet are opposite.
Further, go up the auxiliary magnet and the shape size of auxiliary magnet is the same down, and the internal diameter of going up auxiliary magnet, lower auxiliary magnet and magnetic conduction section of thick bamboo is greater than the internal diameter of magnetic conduction bowl cavity, the external diameter of main magnet with magnetic conduction bowl cavity external diameter equals, the internal diameter of magnetic conduction section of thick bamboo and last auxiliary magnet, lower auxiliary magnet equals, the external diameter of magnetic conduction section of thick bamboo with the internal diameter of main magnet equals, the external diameter of going up auxiliary magnet, lower auxiliary magnet is greater than the external diameter of magnetic conduction section of thick bamboo.
Furthermore, the magnetic conduction bowl, the magnetic conduction end cover, the upper auxiliary magnet, the lower auxiliary magnet, the main magnet and the magnetic conduction cylinder are fixed through adhesives.
Compared with the prior art, the utility model discloses a beneficial effect that technical scheme brought is:
the utility model discloses a magnetic conduction section of thick bamboo that high magnetic conductivity material made is embedded inside the main magnet, carries out passive shimming to the working area that conducting fluid locates, has improved magnetic field homogeneity, is favorable to reducing the nonlinear error of magnetic current body momentum wheel; the utility model increases the magnetic flux of the whole magnetic circuit structure by introducing the upper and the lower auxiliary magnets, is beneficial to increasing the average magnetic induction intensity, reduces the time constant of the magnetic fluid momentum wheel, greatly improves the response speed, and expands the working frequency band of the magnetic fluid momentum wheel; the utility model discloses in, the direction of magnetizing of auxiliary magnet and main magnet magnetic leakage opposite direction have increased the magnetic resistance on the main magnet magnetic leakage way, are favorable to reducing the main magnet tip magnetic leakage, and the magnetic flux restriction that produces the main magnet is in the workspace, has increased the utilization ratio of permanent magnet, when realizing the same magnetic field performance the permanent magnet quantity of magnetic circuit is less, is favorable to reducing the complete machine quality that magnetic current body momentum turned, realizes miniaturized production.
Drawings
Fig. 1 is a schematic axial cross-sectional structure diagram of the magnetic circuit structure of the present invention.
Fig. 2 is a top sectional view of the magnetic circuit structure of the present invention.
Fig. 3 is a magnetic force line distribution diagram of the magnetic circuit structure of the present invention.
Reference numerals: 1-magnetic conduction shell, 2-upper auxiliary magnet, 3-lower auxiliary magnet, 4-main magnet, 5-magnetic conduction cylinder, 6-magnetic gap, 11-magnetic conduction end cover, 12-magnetic conduction bowl
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, for the embodiment of the present invention provides a magnetic circuit structure for magnetic fluid momentum wheel, including a magnetic conduction casing 1, an upper auxiliary magnet 2, a lower auxiliary magnet 3, a main magnet 4 and a magnetic conduction cylinder 5, the magnetic conduction casing 1 includes a magnetic conduction end cover 11 and a magnetic conduction bowl 12, the top of the magnetic conduction bowl 12 is fixedly connected with the bottom of the magnetic conduction end cover 11, the upper auxiliary magnet 2, the main magnet 4 and the lower auxiliary magnet 3 are sequentially and fixedly connected with the inside of the magnetic conduction bowl 12 from top to bottom, the magnetic conduction cylinder 5 is nested in the main magnet 4, the outer wall of the magnetic conduction cylinder 5 is fixedly connected with the inner wall of the main magnet 4; wherein, lower auxiliary magnet 3 and 12 bottom fixed connection of magnetic conduction bowl, optional, magnetic conduction bowl 12 is fixed through glue with lower auxiliary magnet 3 the utility model discloses an among the other embodiments, can adopt different fixed mode according to concrete needs.
Specifically, the magnetic conduction bowl 12 and the magnetic conduction end cover 11 form the magnetic conduction shell 1 to form a closed magnetic circuit, so that the magnetic fluid momentum wheel is ensured not to generate any magnetic field to the outside to influence other equipment, and meanwhile, the magnetic fluid momentum wheel is also ensured not to be influenced by the external magnetic field, and the anti-interference capability of the magnetic fluid momentum wheel is improved.
Specifically, as shown in fig. 2, the magnetic conducting tube 5, the magnetic conducting bowl 12, the upper auxiliary magnet 2, the lower auxiliary magnet 3, and the main magnet 4 are all hollow cylinders, the upper auxiliary magnet 2 and the lower auxiliary magnet 3 have the same shape and size, and the inner diameters of the upper auxiliary magnet 2, the lower auxiliary magnet 3 and the magnetic conduction cylinder 5 are larger than the inner diameter of the cavity of the magnetic conduction bowl 12, so as to avoid influencing the magnetic gap between the magnetic conduction cylinder 5 and the magnetic conduction bowl 12, specifically, in this embodiment, the outer diameter of the main magnet 4 is equal to the outer diameter of the cavity of the magnetic conduction bowl 12, the inner diameters of the magnetic conduction cylinder 5 and the upper auxiliary magnet 2 and the lower auxiliary magnet 3 are equal, the outer diameter of the magnetic conduction cylinder 5 is equal to the inner diameter of the main magnet 4, so that the magnetic flux generated by the main magnet 4 and the upper and lower auxiliary magnets 2, 3 is introduced into the magnetic gap 6 as much as possible, and the outer diameters of the upper and lower auxiliary magnets 2, 3 are larger than the outer diameter of the magnetic conduction tube 5, thereby reducing the magnetic leakage between the main magnet 4 and the magnetic conduction shell 1 to the maximum extent.
Specifically, as shown in fig. 3, the magnetization direction of the main magnet 4 is radial, the magnetization directions of the upper auxiliary magnet 2 and the lower auxiliary magnet 3 are axial, the magnetization directions of the upper auxiliary magnet 2 and the lower auxiliary magnet 3 are opposite, a magnetic gap 6 is formed between the main magnet 4, the upper auxiliary magnet 2, the lower auxiliary magnet 3, the magnetic conduction tube 5 and the magnetic conduction shell 1, the main magnet 4, the magnetic conduction tube 5 and the magnetic conduction shell 1 form a magnetic gap loop, the upper auxiliary magnet 2 and the lower auxiliary magnet 3 respectively form a magnetic gap loop with the magnetic conduction tube 5 and the magnetic conduction shell 1, the upper auxiliary magnet 2 and the lower auxiliary magnet 3 can improve the magnetic flux of the whole magnetic circuit structure, increase the magnetic flux density, reduce the magnetic leakage between the main magnet 4 and the magnetic conduction shell 1, make the magnetic circuit structure efficient, and facilitate the improvement of the response speed of the magnetic fluid momentum wheel.
The embodiment of the utility model provides an in through introducing magnetic conduction section of thick bamboo 5 for the magnetic field in the magnetic gap 6 is more even, is favorable to improving the nonlinear error that magnetic current body momentum was taken turns.
The present invention is not limited to the above-described embodiments. The above description of the embodiments is intended to describe and illustrate the technical solutions of the present invention, and the above embodiments are merely illustrative and not restrictive. Without departing from the spirit of the invention and the scope of the appended claims, the person skilled in the art can make many changes in form and detail within the teaching of the invention.
Claims (4)
1. The magnetic circuit structure for the magnetic fluid momentum wheel is characterized by comprising a magnetic conduction shell consisting of a magnetic conduction bowl and a magnetic conduction end cover, wherein an upper auxiliary magnet, a main magnet and a lower auxiliary magnet are sequentially arranged in the magnetic conduction bowl from top to bottom, a magnetic conduction cylinder is embedded in the main magnet, and the magnetic conduction bowl, the upper auxiliary magnet, the main magnet, the lower auxiliary magnet and the magnetic conduction cylinder are all of hollow cylinder structures.
2. A magnetic circuit structure for a magnetohydrodynamic momentum wheel according to claim 1, wherein the magnetization direction of the main magnet is radial, the magnetization directions of the upper and lower auxiliary magnets are axial, and the magnetization directions of the upper and lower auxiliary magnets are opposite.
3. The magnetic circuit structure for a magnetic fluid momentum wheel according to claim 1, wherein the upper and lower auxiliary magnets have the same shape and size, and the inner diameters of the upper and lower auxiliary magnets and the magnetic conductive tube are larger than the inner diameter of the magnetic conductive bowl cavity, the outer diameter of the main magnet is equal to the outer diameter of the magnetic conductive bowl cavity, the inner diameters of the magnetic conductive tube are equal to the inner diameters of the upper and lower auxiliary magnets, the outer diameter of the magnetic conductive tube is equal to the inner diameter of the main magnet, and the outer diameters of the upper and lower auxiliary magnets are larger than the outer diameter of the magnetic conductive tube.
4. A magnetic circuit structure for a magnetic fluid momentum wheel according to claim 1, wherein the magnetic conducting bowl, the magnetic conducting end cap, the upper auxiliary magnet, the lower auxiliary magnet, the main magnet and the magnetic conducting cylinder are fixed by an adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921227262.6U CN210093097U (en) | 2019-07-31 | 2019-07-31 | Magnetic circuit structure for magnetic fluid momentum wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921227262.6U CN210093097U (en) | 2019-07-31 | 2019-07-31 | Magnetic circuit structure for magnetic fluid momentum wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210093097U true CN210093097U (en) | 2020-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921227262.6U Active CN210093097U (en) | 2019-07-31 | 2019-07-31 | Magnetic circuit structure for magnetic fluid momentum wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210093097U (en) |
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2019
- 2019-07-31 CN CN201921227262.6U patent/CN210093097U/en active Active
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