CN110572075A - Actuator with solenoid providing axial permanent magnetic field - Google Patents
Actuator with solenoid providing axial permanent magnetic field Download PDFInfo
- Publication number
- CN110572075A CN110572075A CN201910715686.5A CN201910715686A CN110572075A CN 110572075 A CN110572075 A CN 110572075A CN 201910715686 A CN201910715686 A CN 201910715686A CN 110572075 A CN110572075 A CN 110572075A
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- Prior art keywords
- solenoid
- magnetic field
- magnetizer
- axial
- actuator
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- 238000009413 insulation Methods 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 2
- 230000004907 flux Effects 0.000 claims 1
- 230000005284 excitation Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0273—Magnetic circuits with PM for magnetic field generation
- H01F7/0278—Magnetic circuits with PM for magnetic field generation for generating uniform fields, focusing, deflecting electrically charged particles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/04—Constructional details
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention discloses an actuator for providing an axial permanent magnetic field by a solenoid, which comprises: the device comprises a shell, an upper end cover, a lower end cover, a solenoid, a first magnetizer, a magnetostrictive rod, a second magnetizer, a pre-pressing disc spring and a push rod; the solenoid forms an axial permanent magnetic field in the axial through hole, and the upper end cover and the lower end cover are respectively arranged at two ends of the shell to form a shell; the solenoid is arranged in the shell, the first magnetizer, the magnetostrictive rod and the second magnetizer are arranged in an axial through hole of the solenoid, the first magnetizer and the second magnetizer are positioned at two ends of the magnetostrictive rod, the prepressing disc spring is arranged between the upper end cover and the ejector rod, and the upper end cover is provided with an ejector rod through hole; one end of the ejector rod is abutted against the second magnetizer, and the other end of the ejector rod penetrates through the pre-pressing disc spring and extends out of the through hole of the ejector rod. On the basis of providing an excitation magnetic field, the invention adds a constant permanent magnetic field, so that a driver does not need to design a bias magnetic field, thereby effectively saving the space of a device and miniaturizing the device.
Description
Technical Field
The invention relates to the field of magnetism, in particular to an actuator with a solenoid providing an axial permanent magnetic field.
Background
The rare earth giant magnetostrictive material is a novel functional material with high efficiency for electro-magnetic-mechanical transformation, and has wide application prospect in the fields of aerospace, military, sound technology, shock absorption and shock resistance, precise positioning and the like because the material has the characteristics of quick response, large strain range, strong reliability, large output, high energy density, good frequency characteristic, wide frequency band and the like. A device made of magnetostrictive material is provided with a magnetic field through an excitation solenoid to generate output displacement. Because the performance of the magnetostrictive material is only related to the magnitude of the magnetic field and is not related to the direction of the magnetic field, the magnetostrictive material can only generate unidirectional output and simultaneously has a frequency doubling phenomenon under the action of alternating current, and a bias magnetic field is applied in many application fields to enable the magnetostrictive material to have the output in the opposite direction and eliminate the frequency doubling phenomenon.
the design of the bias magnetic field is relatively simple, and two methods are widely used at present, wherein one method is realized by adopting a solenoid to supply direct current, namely a method for supplying direct current by virtue of an excitation coil, or a method for independently winding an independent solenoid is adopted, but the method can generate a large amount of heat and needs to be provided with a heat dissipation device. The second method is to use a different form of permanent magnet. On magnetostrictive devices without volume and weight limitations, performance requirements can be met as long as the dimensions are sufficiently large. However, in the development of the industry nowadays, the demand for miniaturization of devices is higher and higher, especially in the fields of aerospace and the like, and in order to ensure the maneuverability and flexibility of the whole machine and reduce the machine capacity and power consumption, the components are required to be small in size and light in weight as much as possible. And the miniaturization of magnetostrictive devices has become a bottleneck for applications in these fields. Corresponding to the realization of the bias magnetic field, the heating problem of the direct current in the first method, the miniaturization of the actual device volume in the second method, the uniform assembly and stability problem of the magnetic field provided by the permanent magnet and the like are all problems which need to be solved urgently.
Disclosure of Invention
The technical problem solved by the invention is to provide an actuator for providing an axial permanent magnetic field by a solenoid, and a constant permanent magnetic field is added on the basis of providing an excitation magnetic field, so that a driver does not need to design a bias magnetic field, the space of a device is effectively saved, and the device is miniaturized.
The technical scheme is as follows:
An actuator for a solenoid providing an axial permanent magnetic field, comprising: the device comprises a shell, an upper end cover, a lower end cover, a solenoid, a first magnetizer, a magnetostrictive rod, a second magnetizer, a pre-pressing disc spring and a push rod; the solenoid forms an axial permanent magnetic field in the axial through hole, and the upper end cover and the lower end cover are respectively arranged at two ends of the shell to form a shell; the solenoid is arranged in the shell, the first magnetizer, the magnetostrictive rod and the second magnetizer are arranged in an axial through hole of the solenoid, the first magnetizer and the second magnetizer are positioned at two ends of the magnetostrictive rod, the prepressing disc spring is arranged between the upper end cover and the ejector rod, and the upper end cover is provided with an ejector rod through hole; one end of the ejector rod is abutted against the second magnetizer, and the other end of the ejector rod penetrates through the pre-pressing disc spring and extends out of the through hole of the ejector rod.
Further, the ejector pin includes: the end plate is provided with the end at the rear end, and the end is connected with the body of rod, and the end supports on the second magnetizer, and pre-compaction dish spring wears to establish on the body of rod, and the body of rod stretches out from the ejector pin through-hole.
Further, the end and the rod body are coaxial.
further, the solenoid includes: a support end face, a solenoid body, and a coil; the supporting end faces are arranged at two ends of the solenoid body, and the coil is arranged on the outer wall of the solenoid body; the solenoid body includes: the magnetic conductive body and the permanent magnet are of annular structures, the magnetic conductive bodies and the permanent magnets are alternately arranged at intervals, and the magnetic conductive bodies and the permanent magnets are connected at the contacted end surfaces.
Further, a heat insulation layer is arranged on the inner wall of the solenoid body, and the heat insulation layer is made of a non-magnetic material.
Furthermore, at least three groups of magnetizers and two groups of permanent magnets are arranged, the magnetizers and the permanent magnets are coaxially distributed, and the inner diameters of the magnetizers and the permanent magnets are the same.
Furthermore, the structure of the solenoid body takes the axial center as a midpoint and is of a two-side symmetrical structure.
Furthermore, the permanent magnets are at least 2 groups, and the magnetic properties of the permanent magnets symmetrical on both sides of the central point are the same; the magnetic performance of the permanent magnets distributed from the middle point to the two ends is gradually reduced.
Furthermore, the magnetizer is at least 3 groups, and the length of the magnetizer distributed from the axial center point to the two ends is gradually increased.
Furthermore, the supporting end face is connected with the magnetizer.
the invention has the technical effects that:
1. Because the method of replacing the original skeleton by the permanent magnet and the magnetizer is adopted, a constant permanent magnetic field is added on the basis of providing the excitation magnetic field, so that a driver does not need to design a bias magnetic field, the space of a device is effectively saved, and the device is miniaturized.
2. Because the permanent magnet is positioned in the solenoid, the distance between the permanent magnet and the outside is increased, and the mutual influence between a magnetic field and the outside environment is avoided.
Drawings
FIG. 1 is a schematic diagram of an actuator of the present invention in which a solenoid provides an axial permanent magnetic field;
FIG. 2 is a schematic view of the construction of the carrier rod of the present invention
FIG. 3 is a schematic diagram of the construction of a solenoid according to the present invention;
FIG. 4 is a schematic structural view of a solenoid for providing an axial permanent magnetic field in embodiment 1 of the present invention;
Fig. 5 is a schematic structural view of a solenoid for providing an axial permanent magnetic field in embodiment 2 of the present invention.
Detailed Description
The following description sufficiently illustrates specific embodiments of the invention to enable those skilled in the art to practice and reproduce it.
Fig. 1 is a schematic structural diagram of an actuator of the present invention in which a solenoid provides an axial permanent magnetic field.
An actuator with a solenoid providing an axial permanent magnetic field, comprising: the device comprises a shell 1, an upper end cover 2, a lower end cover 3, a solenoid 4, a first magnetizer 5, a magnetostrictive rod 6, a second magnetizer 7, a pre-pressing disc spring 8 and a push rod 9. The solenoid 4 forms an axial permanent magnetic field in the axial through hole.
The upper end cover 2 and the lower end cover 3 are respectively arranged at two ends of the shell 1 to form a shell. The solenoid 4 is arranged in the shell, the first magnetizer 5, the magnetostrictive rod 6 and the second magnetizer 7 are arranged in an axial through hole of the solenoid 4, the first magnetizer 5 and the second magnetizer 7 are positioned at two ends of the magnetostrictive rod 6, the pre-pressing disc spring 8 is arranged between the upper end cover 2 and the ejector rod 9, and the upper end cover 2 is provided with an ejector rod through hole; one end of the ejector rod 9 abuts against the second magnetizer 7, and the other end of the ejector rod penetrates through the pre-pressing disc spring 8 and extends out of the through hole of the ejector rod, so that the magnetostrictive rod 6 can be stretched to form displacement and output.
Fig. 2 is a schematic structural view of the lift pin 9 of the present invention.
The structure of the jack 9 includes: the end plate 91 and the rod body 92, the end head 93 is arranged at the rear end of the end plate 91, the end plate 91 is connected with the rod body 92 through threads, and the end head 93 is coaxial with the rod body 92.
The end 93 is abutted against the second magnetizer 7, the pre-pressing disc spring 8 is arranged on the rod body 92 in a penetrating way, and the rod body 92 extends out of the through hole of the ejector rod.
Fig. 3 is a schematic view showing the structure of the solenoid 4 according to the present invention.
The structure of the solenoid 4 includes: support end face 41, solenoid body 42, coil 43; the support end surfaces 41 are provided at both ends of the solenoid body 42, and the coil 43 is provided on the outer wall of the solenoid body 42. The solenoid body 42 is a tubular structure, and a heat insulating layer 44 is provided on an inner wall of the solenoid body 42 in order to enhance the heat insulating effect.
The solenoid body 42 includes: magnetizer 421 and permanent magnet 422, magnetizer 421 and permanent magnet 422 are ring structure, and a plurality of magnetizers 421 and permanent magnets 422 are alternately arranged at intervals and connected at the contacted end surface. The plurality of magnetizers 421 and the permanent magnets 422 are coaxially distributed, and have the same inner diameter.
the solenoid body 42 has a structure symmetrical on both sides with the axial center as a midpoint. The coil 43 is formed by winding an enameled wire. The permanent magnets 422 are at least 2 groups, and the permanent magnets 22 symmetrical on both sides of the center point have the same magnetic property; the magnetic properties of the permanent magnets 422 distributed from the midpoint to the ends are gradually reduced. The magnetizers 421 are more than 3 groups, and the length of the magnetizers increases gradually from the axial center point to the two ends. The supporting end surface 41 is connected with the magnetizer 421. The thermal insulation layer 44 is made of non-magnetic material.
Example 1
Fig. 4 is a schematic structural diagram of a solenoid for providing an axial permanent magnetic field according to embodiment 1 of the present invention.
The solenoid body 42 includes six magnetic conductors 21 and five permanent magnets 22.
Example 2
Fig. 5 is a schematic structural diagram of a solenoid for providing an axial permanent magnetic field according to embodiment 2 of the present invention.
The solenoid body 42 includes eight magnetic conductors 421 and seven permanent magnets 422.
The terminology used herein is for the purpose of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (10)
1. An actuator with a solenoid providing an axial permanent magnetic field, comprising: the device comprises a shell, an upper end cover, a lower end cover, a solenoid, a first magnetizer, a magnetostrictive rod, a second magnetizer, a pre-pressing disc spring and a push rod; the solenoid forms an axial permanent magnetic field in the axial through hole, and the upper end cover and the lower end cover are respectively arranged at two ends of the shell to form a shell; the solenoid is arranged in the shell, the first magnetizer, the magnetostrictive rod and the second magnetizer are arranged in an axial through hole of the solenoid, the first magnetizer and the second magnetizer are positioned at two ends of the magnetostrictive rod, the prepressing disc spring is arranged between the upper end cover and the ejector rod, and the upper end cover is provided with an ejector rod through hole; one end of the ejector rod is abutted against the second magnetizer, and the other end of the ejector rod penetrates through the pre-pressing disc spring and extends out of the through hole of the ejector rod.
2. The actuator for providing an axial permanent magnetic field with a solenoid according to claim 1 wherein the plunger comprises: the end plate is provided with the end at the rear end, and the end is connected with the body of rod, and the end supports on the second magnetizer, and pre-compaction dish spring wears to establish on the body of rod, and the body of rod stretches out from the ejector pin through-hole.
3. The actuator for providing an axial permanent magnetic field with a solenoid according to claim 2 wherein the tip and the shaft are coaxial.
4. The actuator for providing an axial permanent magnetic field with a solenoid according to claim 2 wherein the solenoid comprises: a support end face, a solenoid body, and a coil; the supporting end faces are arranged at two ends of the solenoid body, and the coil is arranged on the outer wall of the solenoid body; the solenoid body includes: the magnetic conductive body and the permanent magnet are of annular structures, the magnetic conductive bodies and the permanent magnets are alternately arranged at intervals, and the magnetic conductive bodies and the permanent magnets are connected at the contacted end surfaces.
5. the actuator for providing an axial permanent magnetic field by a solenoid according to claim 4 wherein the inner wall of the solenoid body is provided with a thermal insulation layer, the thermal insulation layer being made of a non-magnetic material.
6. The actuator for providing an axial permanent magnetic field with a solenoid according to claim 4 wherein there are at least three sets of magnetizers and two sets of permanent magnets, the magnetizers and the permanent magnets being coaxially disposed and having the same inner diameter.
7. The actuator for providing an axial permanent magnetic field by a solenoid according to claim 4 wherein the structure of the solenoid body is bilaterally symmetrical about the axial center as the midpoint.
8. The actuator with a solenoid providing an axial permanent magnetic field according to claim 4 wherein the permanent magnets are in at least 2 groups, and the permanent magnets symmetrically disposed on both sides of the center point have the same magnetic properties; the magnetic performance of the permanent magnets distributed from the middle point to the two ends is gradually reduced.
9. An actuator for providing an axial permanent magnetic field for a solenoid according to claim 4 or 8 wherein the number of conducting magnets is at least 3 and the length of the conducting magnets increases from the axial centre point to the ends.
10. The actuator for providing an axial permanent magnetic field with a solenoid according to claim 4 wherein the support end face is connected to the flux conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910715686.5A CN110572075A (en) | 2019-08-05 | 2019-08-05 | Actuator with solenoid providing axial permanent magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910715686.5A CN110572075A (en) | 2019-08-05 | 2019-08-05 | Actuator with solenoid providing axial permanent magnetic field |
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| Publication Number | Publication Date |
|---|---|
| CN110572075A true CN110572075A (en) | 2019-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910715686.5A Pending CN110572075A (en) | 2019-08-05 | 2019-08-05 | Actuator with solenoid providing axial permanent magnetic field |
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| Country | Link |
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| CN (1) | CN110572075A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10242543A (en) * | 1997-02-27 | 1998-09-11 | Seiko Epson Corp | Resin bonding type magnetostrictive material |
| CN2434822Y (en) * | 2000-07-24 | 2001-06-13 | 河北工业大学 | Drum-like bias permanent magnet magnetic extension displacement actuator |
| CN201860272U (en) * | 2010-09-21 | 2011-06-08 | 上海大学 | High linear giant magnetostrictive driver based on permanent-magnet bias |
| CN107091256A (en) * | 2017-06-12 | 2017-08-25 | 南京航空航天大学 | A kind of electro-hydraulic actuator of many intellectual material drivings of active Flat valve |
| CN109756149A (en) * | 2019-03-23 | 2019-05-14 | 内蒙古科技大学 | A kind of ultra-magnetic telescopic actuation means |
-
2019
- 2019-08-05 CN CN201910715686.5A patent/CN110572075A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10242543A (en) * | 1997-02-27 | 1998-09-11 | Seiko Epson Corp | Resin bonding type magnetostrictive material |
| CN2434822Y (en) * | 2000-07-24 | 2001-06-13 | 河北工业大学 | Drum-like bias permanent magnet magnetic extension displacement actuator |
| CN201860272U (en) * | 2010-09-21 | 2011-06-08 | 上海大学 | High linear giant magnetostrictive driver based on permanent-magnet bias |
| CN107091256A (en) * | 2017-06-12 | 2017-08-25 | 南京航空航天大学 | A kind of electro-hydraulic actuator of many intellectual material drivings of active Flat valve |
| CN109756149A (en) * | 2019-03-23 | 2019-05-14 | 内蒙古科技大学 | A kind of ultra-magnetic telescopic actuation means |
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Application publication date: 20191213 |