CN203788192U - Annular fin type giant magnetostrictive actuator device - Google Patents
Annular fin type giant magnetostrictive actuator device Download PDFInfo
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- CN203788192U CN203788192U CN201420097297.3U CN201420097297U CN203788192U CN 203788192 U CN203788192 U CN 203788192U CN 201420097297 U CN201420097297 U CN 201420097297U CN 203788192 U CN203788192 U CN 203788192U
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- permanent magnet
- giant magnetostrictive
- magnetostrictive actuator
- annular fin
- rod
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Abstract
The utility model relates to an annular fin type giant magnetostrictive actuator device. The device comprises an output rod, an upper end cover, a housing, a disc spring, a coil frame, a driving coil, a giant magnetostrictive actuator rod and a permanent magnet. The upper end cover, the disc spring and the output rod form a precompression assembly. The driving coil, the giant magnetostrictive actuator rod, the permanent magnet and an air gap form a magnetic loop. The permanent magnet is disposed inside a central through hole of the coil frame. The permanent magnet is a sectional disc type permanent magnet. The giant magnetostrictive actuator rod is disposed inside the sectional disc type permanent magnet. The outwall of the housing is provided with an annular fin used for improving heat radiation area and improving heat transfer efficiency. The bias magnetic field structure of the annular fin type giant magnetostrictive actuator device utilizes the sectional disc type permanent magnet to improve the magnetic field intensity of a core rod, reduce magnetic resistance without magnetic leakage, reduce size of the driver, and reduce energy dissipation and heat value. A cooling device utilizes the annular fin to improve heat radiation area, improve heat transfer efficiency, and save inner space with simple structure.
Description
Technical field
The utility model relates to a kind of drive assembly, especially a kind of super-magnetostrictive drive device.
Background technology
Modern industry and scientific and technical fast development are had higher requirement to the technology such as Precision Machining and accurate measurement, accurate driving is one of key technology wherein, accurate Driving technique is with a wide range of applications in fields such as precision optical machinery, control, computer, microelectric technique, calorifics and optical engineering, make accurate Driving technique reach fast driving, good stability, the high requirement of precision, need to have advanced control algolithm, high-precision measuring equipment and high performance driver.As the core component of accurate drive system, the control signal receiving is converted into output displacement with microdrive or masterpiece is used in controlled device, plays vital effect.Traditional displacement driver has mechanical type, electric, fluid-type etc., along with the fast development in the fields such as space flight, military project, robot, computer control, traditional driver can not meet the requirement such as high accuracy, fast-response, and therefore people start next-generation drive to study.
For the design of driver, the principle that microminiature driver adopts in the world at present roughly has following several: electromagnetic drive type, electrostatic attraction type, electrostriction type, magnetostriction type, marmem type and thermal expansion type.Electromagnetic drive type, it is traditional electromagnetically operated valve, at present conventional electromagnetically operated valve exists energy and consumes high, coil high, the shortcoming such as noise is large and volume is large that heats up, this is because the volume of the drive efficiency of electromagnetic force and the current density of solenoid and moving iron core is relevant, and this is also a major obstacle that hinders electromagnetic driver microminiaturization.Piezoelectric effect type driver has the advantages such as displacement control precision is high, response is fast, operating frequency is wide, but that the shortcoming of Piezoelectric Driving mode is driving voltage is little compared with high (be generally hectovolt to ten thousand volts between), displacement, electric insulation requires high; Because hesitation is obvious, conventionally to be aided with and boost and hysteresis compensation circuit in addition, and wayward.Marmem has advantages of the output of power large (being about 500MPa) and deformation quantity large (being about 5.5%), but that its shortcoming is response speed is slow, and deformation is step evolution variation, has therefore limited its application.Super-magnetostrictive drive not only simple in structure, displacement is large, power output is strong, and mechanical strength is high, overload capacity is strong, is easy to realize microminiaturized and can adopts controlled in wireless.
Giant magnetostrictive material is a kind of emerging intellectual material that electromagnetic energy is converted to mechanical energy, have that coefficient of dilatation is large, fast response time, electromechanical coupling factor is large, bearing capacity is strong, be easy to realize the advantages such as low-voltage driving, the current great attention that has been subject to various countries' national defence, science and technology and industrial circle.But consider the operating mode of super-magnetostrictive drive, need solution to work long hours, power consumption and caloric value are large, the technical problems such as magnetic resistance is excessive, leakage field.
Summary of the invention
For solving the long power consumption of course of work time and the caloric value of super-magnetostrictive drive, and the technical problem such as magnetic resistance is excessive, leakage field, and a kind of circumferential rib chip super-magnetostrictive drive device is provided.This device mainly designs at bias magnetic field, cooling device, and precompression device designs, thus it is high to reach magnetic field intensity, reduces leakage field, power consumption and caloric value; Magnetostrictive Properties impact on giant magnetostrictive material is little, improves radiating efficiency simultaneously.
For achieving the above object, the technical solution of the utility model is: a kind of circumferential rib chip super-magnetostrictive drive device, comprise take-off lever, upper end cover, shell, dish spring, coil rack, drive coil, giant magnetostrictive rod, permanent magnet, upper end cover, dish spring and take-off lever composition precompression assembly; Drive coil, giant magnetostrictive rod, permanent magnet, air-gap form magnetic loop, are characterized in: in coil rack central through hole, permanent magnet is installed, permanent magnet is segmented collar plate shape permanent magnet, in segmented collar plate shape permanent magnet, is provided with giant magnetostrictive rod.
Outer shell outer wall is provided with the annular fin for increasing heat radiation area and raising heat transfer efficiency.
The utility model compared with prior art, has following beneficial effect:
1) bias magnetic field structure adopts segmented collar plate shape permanent magnet, improves plug magnetic field intensity, reduces magnetic resistance and there is no leakage field, reduces the volume of driver, and power consumption is few, and caloric value is low.
2) cooling device adopts annular fin, and increasing heat radiation area improves heat transfer efficiency, saves inner space, simple in structure.
This device adopts segmented disk permanent magnet structure that bias magnetic field is provided.Because eddy current and the magnetic hysteresis loss of drive coil heating, giant magnetostrictive material all cause temperature to raise, therefore add that at the outer wall of super-magnetostrictive drive annular fin dispels the heat, increasing heat radiation area, reduces the impact on magnetostrictive effect simultaneously.
Brief description of the drawings
Fig. 1 is super-magnetostrictive drive apparatus structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
As shown in Figure 1, a kind of super-magnetostrictive drive device mainly comprises: take-off lever 1, upper end cover 2, shell 3, dish spring 4, coil rack 5, drive coil 6, giant magnetostrictive rod 7, permanent magnet 8, annular fin 9, base 10 etc.Wherein, upper end cover 2, dish spring 4 and take-off lever 1 form precompression assembly, and dish spring 4 is as precompression device, and annular fin 9 is as heat abstractor.Drive coil 6, giant magnetostrictive rod 7, permanent magnet 8, air-gap form magnetic loop.
In coil rack 5 central through holes, permanent magnet 8 is installed, permanent magnet 8 is segmented collar plate shape permanent magnet, in segmented collar plate shape permanent magnet, is provided with giant magnetostrictive rod 7.Shell 3 outer walls are provided with the annular fin 9 for increasing heat radiation area and raising heat transfer efficiency.
Super-magnetostrictive drive is while utilizing giant magnetostrictive rod to change in external magnetic field, occurs that the rule of corresponding dilatation designs and produces.The precompression assembly being made up of upper end cover 2, dish spring 4 and take-off lever 1 applies a precompression to giant magnetostrictive rod, and axially precompression can make the inner magnetic domain of giant magnetostrictive material arrange along the direction vertical with axial stress as much as possible in the time of zero magnetic field; Under additional excitation field effect, can obtain larger axial magnetostrictive strain, thereby increase larger displacement output.
Giant magnetostrictive material tensile strength is low, thereby must operate under pressurized condition, and suitably the compressive pre-stress of size can increase its magnitude of magnetostriction, disk spring 4 can produce required precompression, and disk spring volume is little, quality is light, for small-sized machine, can saves space, reduce weight.
Giant magnetostrictive rod 7 is in the magnetic field of drive coil 6 and bias magnetic field generation.When change in drive coil electric current time, will there is dilatation in giant magnetostrictive rod, generation displacement output, so change by the current value size of controlling ultra-magnetostriction microdisplacement driver coil the magnetic field size that coil produces, just can control output displacement and the power of super-magnetostrictive drive.Wherein apply axial precompression by pre-tightening mechanism to giant magnetostrictive rod, it can make the inner magnetic domain of giant magnetostrictive rod 7 arrange along the direction vertical with axial stress as much as possible in the time of zero magnetic field; Under additional excitation field effect, can obtain larger axial magnetostrictive strain, thereby increase larger displacement output.
Giant magnetostrictive material exists the problem of thermal impact in the course of the work.The rising of temperature is fairly obvious on the impact of giant magnetostrictive material magnetostriction coefficient.The rising of temperature will cause the additional heat distortion of the giant magnetostrictive rod 7 in driver, and the controlled displacement output of driver is affected.Drive coil 6 time inevitably will produce heat in work, and giant magnetostrictive material rod is just in time among the encirclement of coil, and the excitation coil heat part producing of generating heat spreads out of beyond driver by housing.Thereby select when case material to need its capacity of heat transmission stronger, make as far as possible heat energy pass in air by shell 3, therefore add annular fin 9, increasing heat radiation area in outside, the heat producing is passed to rapidly in air, reduce the impact on giant magnetostrictive material Magnetostrictive Properties.
The utility model, at bias magnetic field design aspect, adopts the permanent magnet of segmented collar plate shape, does not need the electric current that provides constant to ensure biased magnetic field strength, therefore consumes energy low, and caloric value is little, and can significantly reduce the volume of driver; Add that the magnetic field intensity that the shell of large magnetic permeability can improve in plug does not have leakage field simultaneously.Aspect cooling device, adopt and add that at driver outer wall annular fin dispels the heat, can not increase auxiliary equipment and not be subject to internal drive spatial limitation, simultaneously rib type fin increasing heat radiation area.
Claims (2)
1. a circumferential rib chip super-magnetostrictive drive device, comprise take-off lever (1), upper end cover (2), shell (3), dish spring (4), coil rack (5), drive coil (6), giant magnetostrictive rod (7), permanent magnet (8), upper end cover (2), dish spring (4) and take-off lever (1) composition precompression assembly; Drive coil (6), giant magnetostrictive rod (7), permanent magnet (8), air-gap form magnetic loop, it is characterized in that: in described coil rack (5) central through hole, permanent magnet (8) is installed, permanent magnet (8) is segmented collar plate shape permanent magnet, is provided with giant magnetostrictive rod (7) in segmented collar plate shape permanent magnet.
2. circumferential rib chip super-magnetostrictive drive device according to claim 1, is characterized in that: described shell (3) outer wall is provided with the annular fin (9) for increasing heat radiation area and raising heat transfer efficiency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420097297.3U CN203788192U (en) | 2014-03-05 | 2014-03-05 | Annular fin type giant magnetostrictive actuator device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420097297.3U CN203788192U (en) | 2014-03-05 | 2014-03-05 | Annular fin type giant magnetostrictive actuator device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203788192U true CN203788192U (en) | 2014-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420097297.3U Expired - Fee Related CN203788192U (en) | 2014-03-05 | 2014-03-05 | Annular fin type giant magnetostrictive actuator device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203788192U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840703A (en) * | 2014-03-05 | 2014-06-04 | 上海应用技术学院 | Annular finned giant magnetostrictive actuator device |
| CN104993734A (en) * | 2015-06-24 | 2015-10-21 | 浙江理工大学 | Moving-magnetic type magneto micro-displacement drive |
-
2014
- 2014-03-05 CN CN201420097297.3U patent/CN203788192U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840703A (en) * | 2014-03-05 | 2014-06-04 | 上海应用技术学院 | Annular finned giant magnetostrictive actuator device |
| CN104993734A (en) * | 2015-06-24 | 2015-10-21 | 浙江理工大学 | Moving-magnetic type magneto micro-displacement drive |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 Termination date: 20150305 |
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| EXPY | Termination of patent right or utility model |