CN110838802A - Giant magnetostrictive driver - Google Patents
Giant magnetostrictive driver Download PDFInfo
- Publication number
- CN110838802A CN110838802A CN201810927063.XA CN201810927063A CN110838802A CN 110838802 A CN110838802 A CN 110838802A CN 201810927063 A CN201810927063 A CN 201810927063A CN 110838802 A CN110838802 A CN 110838802A
- Authority
- CN
- China
- Prior art keywords
- giant magnetostrictive
- coil
- rod
- shell
- magnetostrictive actuator
- 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.)
- Pending
Links
- 238000001816 cooling Methods 0.000 claims abstract description 49
- 238000006073 displacement reaction Methods 0.000 claims abstract description 34
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 230000003321 amplification Effects 0.000 claims abstract description 11
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 38
- 230000008859 change Effects 0.000 claims description 22
- 239000012782 phase change material Substances 0.000 claims description 19
- 238000009413 insulation Methods 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims 1
- 239000012071 phase Substances 0.000 description 14
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 13
- 235000017491 Bambusa tulda Nutrition 0.000 description 13
- 241001330002 Bambuseae Species 0.000 description 13
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 13
- 239000011425 bamboo Substances 0.000 description 13
- 239000000463 material Substances 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 230000005381 magnetic domain Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- -1 with casing 1 Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- H02N2/0005—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing non-specific motion; Details common to machines covered by H02N2/02 - H02N2/16
- H02N2/005—Mechanical details, e.g. housings
-
- 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
- H02N2/0005—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing non-specific motion; Details common to machines covered by H02N2/02 - H02N2/16
- H02N2/0075—Electrical details, e.g. drive or control circuits or methods
-
- 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
- H02N2/0005—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing non-specific motion; Details common to machines covered by H02N2/02 - H02N2/16
- H02N2/009—Thermal details, e.g. cooling means
Abstract
The invention discloses a giant magnetostrictive actuator, which comprises a shell and a base arranged at the bottom of the shell, wherein a magnetic field generating device, a cooling device, a pre-tightening device and a positioning device are arranged in the shell 1, and the giant magnetostrictive actuator also comprises a detection device for detecting the performance of the giant magnetostrictive actuator; the vortex groove can further improve the control precision of the output displacement, and meanwhile, a test system formed by the sensor, the signal amplification device and the computing mechanism is used for detecting the driving performance of the driver, so that the test time is short, and the test efficiency and the test precision are high.
Description
Technical Field
The invention relates to the technical field of giant magnetostriction, in particular to a giant magnetostriction driver.
Background
At normal temperature, the length and volume of the material change greatly due to the change of the magnetization state, that is, the magnetostrictive material with a very large magnetostriction coefficient is called Giant Magnetostrictive Material (GMM), and is also called rare earth giant magnetostrictive material because of being mostly constructed by rare earth. The material has high heat-resisting temperature and strong magnetostriction performance. At room temperature, the conversion rate between mechanical energy and electric energy is high, the energy density is high, the response speed is high, the reliability is good, and the driving mode is simple. However, when the giant magnetostrictive actuator works, the thermal deformation of the giant magnetostrictive rod caused by the heating of the coil and the maximum controllable displacement output of the giant magnetostrictive actuator are both dozens of microns and are in the same order of magnitude, and the influence on the precision of the actuator is large. Meanwhile, heat emitted by the coil can be transferred to the magnetostrictive rod, and can also be transferred to the base, the end cover, the shell and other parts from the two end faces and the outer surface of the coil respectively, so that the deformation of the coil is caused, and the output precision of the driver can be influenced. Therefore, the prior driver technology can not well meet the precision requirement in the working occasions of long time, large current and ultrahigh precision. The magnetostrictive actuator, as a novel actuator technology, has the advantages of high frequency, high Curie temperature, high controllability, fast response, fast switching speed, low power consumption, small environmental factor influence and the like, but the application of the magnetostrictive actuator is restricted due to the defects of small output displacement of magnetostrictive materials and the like.
Disclosure of Invention
The present invention is directed to a super magnetostrictive actuator to solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme:
the giant magnetostrictive actuator comprises a shell and a base arranged at the bottom of the shell, wherein a magnetic field generating device, a cooling device, a pre-tightening device and a positioning device are arranged inside the shell, and the giant magnetostrictive actuator further comprises a detection device for detecting the performance of the giant magnetostrictive actuator
Further: the magnetic field generating device comprises a coil framework and a permanent magnet, wherein the coil framework is arranged on the lower side in the shell, the permanent magnet is arranged on the outer side of the coil framework, a driving coil is wound on the outer side of the coil framework, a bias coil is wound on the outer side of the driving coil, a heat insulation plate is arranged in the coil framework and in the contact position of the bias coil, a U-shaped cylinder is arranged in the middle of the coil framework and provided with a cavity, a first giant magnetostrictive rod is placed in the opening end of the U-shaped cylinder, two second giant magnetostrictive rods are placed in the outer side of the U-shaped cylinder and in the cavity of the coil framework in a bilateral symmetry mode, the top ends of the two second giant magnetostrictive rods are abutted to the top end of the U-shaped cylinder, the bottom ends of the two second giant magnetostrictive rods are abutted to a base, and an output ejector rod is arranged on the upper side of the first giant magnetostrictive rod.
Further: cooling device is including setting up the water-cooling mechanism in the casing inside and be located the permanent magnet outside, and water-cooling mechanism includes water-cooling chamber and the water inlet and the delivery port that are linked together with the water-cooling chamber, and water inlet and delivery port all set up on the outer wall of casing, and cooling device is still including setting up inside the cavity of coil skeleton and being located the phase transition temperature control section of thick bamboo in the two super magnetostrictive rod outsides of second, and it has phase change material to fill in the inside cavity of phase transition temperature control section of thick bamboo, and phase transition temperature control section of thick bamboo contacts and is interference fit with coil skeleton.
Further: six eddy current straight grooves are formed in the outer surfaces of the first giant magnetostrictive rod and the second giant magnetostrictive rod and are uniformly distributed on the outer surfaces of the first giant magnetostrictive rod and the second giant magnetostrictive rod along the circumferential direction.
Further: the pre-tightening device comprises a top cover, a pre-tightening nut and a pre-tightening spring, the top cover is arranged at the top end of the shell, the pre-tightening nut is connected to the top cover in a threaded mode, a through hole is formed in the pre-tightening nut, the output ejector rod penetrates through the through hole in the pre-tightening nut and extends to the outer side of the top cover, and the pre-tightening spring is sleeved on one section of outer wall, located inside the shell, of the.
Further: the positioning device comprises an adjusting bolt, and the top end of the adjusting bolt extends into the shell and is fixedly connected with the closed section of the U-shaped cylinder.
Further: the shell, the base, the coil framework, the reduction base, the coil framework, the U-shaped cylinder and the output ejector rod are all made of magnetic materials.
Further: the detection device comprises a supporting base and a support, the supporting base is connected with the support through a bolt, a displacement sensor used for displacement detection and a pressure sensor used for pressure detection are arranged on the support, a giant magnetostrictive actuator is respectively connected with the displacement sensor and the pressure sensor through an output ejector rod, the displacement sensor and the pressure sensor are both connected with a signal amplification device, the signal amplification device is connected with a signal acquisition device, the signal acquisition device is connected with a computer, when the output ejector rod generates displacement and force output, voltage changes generated by the displacement sensor and the pressure sensor are transmitted into the signal acquisition device after being amplified by the signal amplification device, and the signal acquisition device transmits data into the computer for quick and accurate test and subsequent processing analysis of the data.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts the combination of the water cooling mechanism and the phase change material to control the temperature, the water cooling mechanism is used for cooling the outer side of the coil to prevent the side surface of the shell from being heated and deformed, the phase change material is used for cooling the inner side of the coil to inhibit the temperature rise and deformation of the giant magnetostrictive rod, the output precision of the giant magnetostrictive driver is improved, and the long-time stable work is ensured;
the volume is small, the weight is light, the output displacement is large, the output force is large, the pre-pressure and the bias magnetic field can be adjusted, the super magnetostrictive rod can be ensured to work in the best state, the output displacement and the output force are good in linearity, the response speed is high, and the control precision is high;
the eddy current groove formed on the surface of the giant magnetostrictive rod can inhibit the temperature rise of the magnetostrictive rod, and further improve the control precision of output displacement;
meanwhile, a test system consisting of the sensor, the signal amplification device and the computing mechanism is used for detecting the driving performance of the driver, so that the test time is short, and the test efficiency and the test precision are high.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic diagram of the structure of the detection device of the present invention.
Fig. 3 is a schematic structural view of a first giant magnetostrictive rod and a second giant magnetostrictive rod in the present invention.
Fig. 4 is a schematic side view of the first and second magnetostrictive rods according to the present invention.
In the figure: 1-a shell, 2-a base, 3-a coil framework, 4-a driving coil, 5-a bias coil, 6-a thermal baffle, 7-a permanent magnet, 8-a first super magnetostrictive rod, 9-a U-shaped cylinder, 10-a second super magnetostrictive rod, 11-an output ejector rod, 12-a top cover, 13-a pre-tightening nut, 14-a pre-tightening spring and 15-a water cooling mechanism, 16-water cooling cavity, 17-water inlet, 18-water outlet, 19-phase change temperature control cylinder, 20-phase change material, 21-top adjusting bolt, 22-vortex straight groove, 23-supporting base, 24-bracket, 25-displacement sensor, 26-pressure sensor, 27-signal amplifying device, 28-signal collecting device and 29-computer.
Detailed Description
In order to enhance the understanding of the present invention, the present invention will be further described with reference to the following examples, which are only for the purpose of illustrating the present invention and are not to be construed as limiting the scope of the present invention.
Example 1
Referring to fig. 1, a giant magnetostrictive actuator includes a housing 1 and a base 2 disposed at the bottom of the housing 1, wherein a magnetic field generating device, a cooling device, a pre-tightening device and a positioning device are disposed inside the housing 1;
the magnetic field generating device comprises a coil frame 3 arranged at the lower side in the shell 1 and a permanent magnet 7 arranged at the outer side of the coil frame 3, a driving coil 4 is wound on the outer side of the coil framework 3, a bias coil 5 is wound on the outer side of the driving coil 4, a heat insulation plate 6 is arranged at the contact part of the inner part of the coil framework 3 and the driving coil 4 and the bias coil 5, a cavity is arranged in the middle of the coil framework 3, a U-shaped cylinder 9 is arranged in the cavity, a first giant magnetostrictive rod 8 is arranged in the opening end of the U-shaped cylinder 9, two second giant magnetostrictive rods 10 are symmetrically placed on the left and right of the outer side of the U-shaped barrel 9 and inside the cavity of the coil framework 3, the top ends of the two second giant magnetostrictive rods 10 are abutted with the top end of the outer side of the U-shaped barrel 9, the bottom ends of the two second giant magnetostrictive rods 10 are abutted with the base 2, and an output ejector rod 11 is arranged on the upper side of the first giant magnetostrictive rod 8;
when the giant magnetostrictive actuator is used, the driving coil 4 is electrified, the magnetic field generated by the driving coil enables the first giant magnetostrictive rod 8 to generate length change, and the first giant magnetostrictive rod 8 drives the output ejector rod 11 to perform telescopic motion so as to realize driving work;
be provided with biasing coil 5, the biasing magnetic field that biasing coil 5 produced enables the super magnetostrictive rod to produce a polarized magnetic field that has certain intensity, not only can make the flexible strain of stick be in the linear range of broad and can also effectually prevent the emergence of stick doubling of frequency phenomenon simultaneously, owing to be provided with second super magnetostrictive rod 10, second super magnetostrictive rod 10 drives the U-shaped section of thick bamboo when taking place length variation and carries out the up-and-down motion, second super magnetostrictive rod 10 can pass through U-shaped sleeve 10 and transmit the power of output and displacement for first super magnetostrictive rod 8, thereby main super magnetostrictive rod 8 can export twice power and displacement, the output displacement and the output power of super magnetostrictive driver have been improved.
The cooling device comprises a water cooling mechanism 15 which is arranged inside the shell 1 and positioned outside the permanent magnet 7, the water cooling mechanism 15 comprises a water cooling cavity 16 and a water inlet 17 and a water outlet 18 which are communicated with the water cooling cavity 16, the water inlet 17 and the water outlet 18 are both arranged on the outer wall of the shell 1, the cooling device also comprises a phase change temperature control cylinder 19 which is arranged inside the cavity of the coil framework 3 and positioned outside the two second giant magnetostrictive rods 10, the internal cavity of the phase change temperature control cylinder 19 is filled with a phase change material 20, and the phase change temperature control cylinder 19 is in contact with the coil framework 3 and is in interference fit with the coil framework;
the combination of the water cooling mechanism and the phase change material is adopted for temperature control, the water cooling mechanism is used for cooling the outer side of the coil, the side surface of the shell is prevented from being heated and deformed, the phase change material is used for cooling the inner side of the coil, the temperature rise deformation of the giant magnetostrictive rod is inhibited, the phase change material does not need a circulating pipeline, so that the structure of the giant magnetostrictive actuator is simple, a large amount of heat can be absorbed when the phase change material is in phase change, the cooling effect is good, and the output precision of the giant magnetostrictive actuator is always in a better level; in addition, a heat insulation plate 6 is arranged at the contact part between the inside of the coil framework 3 and the driving coil 4 and the bias coil 5, so that the temperature rise of the giant magnetostrictive actuator is restrained on the whole, the upper part and the lower part of the shell are not deformed by heating, and the displacement control precision of the giant magnetostrictive actuator is improved;
in the driver working process, the in-process of the inward transmission of heat that the coil gived off, earlier through the phase change temperature control section of thick bamboo, phase change material 20 absorbs the heat, when reaching the fusing point, begin to melt, absorb and store the heat equivalent with melting latent heat, interface temperature keeps unchangeable at the fusing point simultaneously, thereby make the temperature rise of super magnetostrictive rod restrained, when flexible driver coil outage, liquid phase change material begins to release latent heat and solidifies by oneself, the temperature of super magnetostrictive rod still remains unchanged, after phase change material 20 all solidifies, the temperature of magnetostrictive rod returns ambient temperature gradually, thereby maintain the invariable operating temperature of super magnetostrictive rod, water-cooling mechanism is circulating water cooling mechanism, can cool down the outside of coil, thereby can effectively prevent the side of shell 1 from being heated and warping.
The pre-tightening device comprises a top cover 12, a pre-tightening nut 13 and a pre-tightening spring 14, wherein the top cover 12 is arranged at the top end of the shell 1, the pre-tightening nut 13 is screwed on the top cover 12, a through hole is formed in the pre-tightening nut 13, the output ejector rod 11 penetrates through the through hole in the pre-tightening nut 13 and extends to the outer side of the top cover 12, and the pre-tightening spring 13 is sleeved on one section of outer wall, located inside the shell 1, of the output ejector rod 11;
the pre-tightening device comprises a top cover 12, a pre-tightening nut 13 and a pre-tightening spring 14, the pre-tightening force can be adjusted by adjusting the position of the pre-tightening nut 13 and the elasticity of the pre-tightening spring 14, and the energy conversion efficiency of giant magnetostriction can be generally in a better range by adjusting the proper pre-tightening force.
The positioning device comprises an adjusting bolt 21, and the top end of the adjusting bolt 21 extends into the shell 1 and is fixedly connected with the closed section of the U-shaped cylinder 9;
through setting up adjusting bolt 21, can fix the position of a U-shaped section of thick bamboo 9, realize the regulation to a U-shaped section of thick bamboo 9 position to can realize the position control of output ejector pin, satisfy the operation requirement of different actuating positions.
Example 2
Referring to fig. 1-4, a giant magnetostrictive actuator includes a housing 1 and a base 2 disposed at the bottom of the housing 1, wherein a magnetic field generating device, a cooling device, a pre-tightening device and a positioning device are disposed inside the housing 1;
the magnetic field generating device comprises a coil frame 3 arranged at the lower side in the shell 1 and a permanent magnet 7 arranged at the outer side of the coil frame 3, a driving coil 4 is wound on the outer side of the coil framework 3, a bias coil 5 is wound on the outer side of the driving coil 4, a heat insulation plate 6 is arranged at the contact part of the inner part of the coil framework 3 and the driving coil 4 and the bias coil 5, a cavity is arranged in the middle of the coil framework 3, a U-shaped cylinder 9 is arranged in the cavity, a first giant magnetostrictive rod 8 is arranged in the opening end of the U-shaped cylinder 9, two second giant magnetostrictive rods 10 are symmetrically placed on the left and right of the outer side of the U-shaped barrel 9 and inside the cavity of the coil framework 3, the top ends of the two second giant magnetostrictive rods 10 are abutted with the top end of the outer side of the U-shaped barrel 9, the bottom ends of the two second giant magnetostrictive rods 10 are abutted with the base 2, and an output ejector rod 11 is arranged on the upper side of the first giant magnetostrictive rod 8;
when the giant magnetostrictive actuator is used, the driving coil 4 is electrified, the magnetic field generated by the driving coil enables the first giant magnetostrictive rod 8 to generate length change, and the first giant magnetostrictive rod 8 drives the output ejector rod 11 to perform telescopic motion so as to realize driving work;
be provided with biasing coil 5, the biasing magnetic field that biasing coil 5 produced enables the super magnetostrictive rod to produce a polarized magnetic field that has certain intensity, not only can make the flexible strain of stick be in the linear range of broad and can also effectually prevent the emergence of stick doubling of frequency phenomenon simultaneously, owing to be provided with second super magnetostrictive rod 10, second super magnetostrictive rod 10 drives the U-shaped section of thick bamboo when taking place length variation and carries out the up-and-down motion, second super magnetostrictive rod 10 can pass through U-shaped sleeve 10 and transmit the power of output and displacement for first super magnetostrictive rod 8, thereby main super magnetostrictive rod 8 can export twice power and displacement, the output displacement and the output power of super magnetostrictive driver have been improved.
The cooling device comprises a water cooling mechanism 15 which is arranged inside the shell 1 and positioned outside the permanent magnet 7, the water cooling mechanism 15 comprises a water cooling cavity 16 and a water inlet 17 and a water outlet 18 which are communicated with the water cooling cavity 16, the water inlet 17 and the water outlet 18 are both arranged on the outer wall of the shell 1, the cooling device also comprises a phase change temperature control cylinder 19 which is arranged inside the cavity of the coil framework 3 and positioned outside the two second giant magnetostrictive rods 10, the internal cavity of the phase change temperature control cylinder 19 is filled with a phase change material 20, and the phase change temperature control cylinder 19 is in contact with the coil framework 3 and is in interference fit with the coil framework;
the combination of the water cooling mechanism and the phase change material is adopted for temperature control, the water cooling mechanism is used for cooling the outer side of the coil, the side surface of the shell is prevented from being heated and deformed, the phase change material is used for cooling the inner side of the coil, the temperature rise deformation of the giant magnetostrictive rod is inhibited, the phase change material does not need a circulating pipeline, so that the structure of the giant magnetostrictive actuator is simple, a large amount of heat can be absorbed when the phase change material is in phase change, the cooling effect is good, and the output precision of the giant magnetostrictive actuator is always in a better level; in addition, a heat insulation plate 6 is arranged at the contact part between the inside of the coil framework 3 and the driving coil 4 and the bias coil 5, so that the temperature rise of the giant magnetostrictive actuator is restrained on the whole, the upper part and the lower part of the shell are not deformed by heating, and the displacement control precision of the giant magnetostrictive actuator is improved;
in the driver working process, the in-process of the inward transmission of heat that the coil gived off, earlier through the phase change temperature control section of thick bamboo, phase change material 20 absorbs the heat, when reaching the fusing point, begin to melt, absorb and store the heat equivalent with melting latent heat, interface temperature keeps unchangeable at the fusing point simultaneously, thereby make the temperature rise of super magnetostrictive rod restrained, when flexible driver coil outage, liquid phase change material begins to release latent heat and solidifies by oneself, the temperature of super magnetostrictive rod still remains unchanged, after phase change material 20 all solidifies, the temperature of magnetostrictive rod returns ambient temperature gradually, thereby maintain the invariable operating temperature of super magnetostrictive rod, water-cooling mechanism is circulating water cooling mechanism, can cool down the outside of coil, thereby can effectively prevent the side of shell 1 from being heated and warping.
In order to further reduce the influence of temperature on the giant magnetostrictive rods, six eddy current straight grooves 22 are formed in the outer surfaces of the first giant magnetostrictive rod 8 and the second giant magnetostrictive rod 10, and the six eddy current straight grooves 22 are uniformly distributed on the outer surfaces of the first giant magnetostrictive rod 8 and the second giant magnetostrictive rod 10 along the circumferential direction;
the outer surfaces of the first giant magnetostrictive rod 8 and the second giant magnetostrictive rod 10 are provided with the eddy current straight grooves 22, the heat dissipation area of the giant magnetostrictive rod is enlarged by the eddy current straight grooves 22, the contact area of the giant magnetostrictive rod and the U-shaped cylinder is reduced, so that the improvement of heat dissipation capacity and the reduction of friction heating are facilitated, in addition, because the eddy current effect of the giant magnetostrictive rod is mainly concentrated on the surface layer, the eddy current loss can be reduced by opening the eddy current grooves, the number of free rotary crystals and magnetic domains on the surface of the giant magnetostrictive rod is increased after the eddy current grooves are opened, the mutual extrusion between the crystals and the magnetic domains can be reduced, the blockage of magnetic moment rotation is reduced, and the hysteresis loss can be effectively reduced.
The pre-tightening device comprises a top cover 12, a pre-tightening nut 13 and a pre-tightening spring 14, wherein the top cover 12 is arranged at the top end of the shell 1, the pre-tightening nut 13 is screwed on the top cover 12, a through hole is formed in the pre-tightening nut 13, the output ejector rod 11 penetrates through the through hole in the pre-tightening nut 13 and extends to the outer side of the top cover 12, and the pre-tightening spring 13 is sleeved on one section of outer wall, located inside the shell 1, of the output ejector rod 11;
the pre-tightening device comprises a top cover 12, a pre-tightening nut 13 and a pre-tightening spring 14, the pre-tightening force can be adjusted by adjusting the position of the pre-tightening nut 13 and the elasticity of the pre-tightening spring 14, and the energy conversion efficiency of giant magnetostriction can be generally in a better range by adjusting the proper pre-tightening force.
The positioning device comprises an adjusting bolt 21, and the top end of the adjusting bolt 21 extends into the shell 1 and is fixedly connected with the closed section of the U-shaped cylinder 9;
through setting up adjusting bolt 21, can fix the position of a U-shaped section of thick bamboo 9, realize the regulation to a U-shaped section of thick bamboo 9 position to can realize the position control of output ejector pin, satisfy the operation requirement of different actuating positions.
For the magnetic leakage phenomenon of effectual reduction giant magnetostrictive actuator, casing 1, base 2, coil skeleton 3, reduction base 2, coil skeleton 3, U-shaped section of thick bamboo 9 and output ejector pin 11 are magnetic materials, with casing 1, base 2, coil skeleton 3, reduce base 2, coil skeleton 3, U-shaped section of thick bamboo 9 and output ejector pin 11 adoption magnetic materials and make, it forms closed magnetic circuit with first giant magnetostrictive rod 8 and the super magnetostrictive rod 10 of second, closed magnetic circuit can not only be fine reduce the magnetic leakage, can also prevent to take place to interfere with external instrument.
The device also comprises a detection device for detecting the performance of the giant magnetostrictive actuator, the detection device comprises a support base 23 and a support 24, the support base 23 is connected with the support 24 through a bolt, a displacement sensor 25 for detecting displacement and a pressure sensor 26 for detecting pressure are arranged on the support 24, the giant magnetostrictive actuator is respectively connected with the displacement sensor 25 and the pressure sensor 26 through an output ejector rod 11, the displacement sensor 25 and the pressure sensor 26 are both connected with a signal amplification device 27, the signal amplification device 27 is connected with a signal acquisition device 28, the signal acquisition device 28 is connected with a computer, when the output ejector rod 11 generates displacement and force output, the voltage change generated by the displacement sensor 25 and the pressure sensor 26 is amplified by the signal amplification device 27 and then transmitted into the signal acquisition device 28, the signal acquisition device 28 transmits data into the computer 29, the device is used for quickly and accurately carrying out test and subsequent processing and analysis of data;
the giant magnetostrictive actuator is connected with the sensor through the output ejector rod 11, when the output of displacement and force is generated, the voltage change generated by the sensor is amplified by the amplifier and then transmitted to the signal acquisition device through the acquisition card, and then the data is transmitted to the computer, so that the performance of the giant magnetostrictive actuator can be tested quickly and accurately, the subsequent processing and analysis of the data are facilitated, the testing time is shortened, the testing efficiency is improved, and the testing precision is high.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a giant magnetostrictive actuator, includes casing (1) and sets up base (2) in casing (1) bottom, its characterized in that, casing (1) inside is equipped with magnetic field generating device, cooling device, preloading device and positioner, still including being used for carrying out the detection device that performance detected to giant magnetostrictive actuator.
2. The giant magnetostrictive actuator according to claim (1), wherein the magnetic field generating device comprises a bobbin (3) arranged at the lower side inside the housing (1) and a permanent magnet (7) arranged at the outer side of the bobbin (3), a driving coil (4) is wound at the outer side of the bobbin (3), a bias coil (5) is wound at the outer side of the driving coil (4), a heat insulation plate (6) is arranged at the contact position of the inside of the bobbin (3) with the driving coil (4) and the bias coil (5), a U-shaped cylinder (9) is arranged in the middle of the bobbin (3) and is arranged in the cavity, a first giant magnetostrictive rod (8) is arranged in the opening end of the U-shaped cylinder (9), two second giant magnetostrictive rods (10) are symmetrically arranged at the left and right sides outside the U-shaped cylinder (9) and in the cavity of the bobbin (3), the top ends of the two second giant magnetostrictive rods (10) are abutted with the top end of the outer side of the U-shaped cylinder (9), the bottom ends of the two second giant magnetostrictive rods (10) are abutted with the base (2), and the upper side of the first giant magnetostrictive rod (8) is provided with an output ejector rod (11).
3. The giant magnetostrictive actuator according to claim (1), wherein the cooling device comprises a water cooling mechanism (15) which is arranged inside the shell (1) and positioned outside the permanent magnet (7), the water cooling mechanism (15) comprises a water cooling cavity (16) and a water inlet (17) and a water outlet (18) which are communicated with the water cooling cavity (16), the water inlet (17) and the water outlet (18) are both arranged on the outer wall of the shell (1), the cooling device further comprises a phase change temperature control cylinder (19) which is arranged inside the cavity of the coil skeleton (3) and positioned outside the two second giant magnetostrictive rods (10), the internal cavity of the phase change temperature control cylinder (19) is filled with a phase change material (20), and the phase change temperature control cylinder (19) is in contact with the coil skeleton (3) and is in interference fit.
4. The giant magnetostrictive actuator according to claim (1), wherein the outer surfaces of the first giant magnetostrictive rod (8) and the second giant magnetostrictive rod (10) are respectively provided with six eddy current straight grooves (22), and the six eddy current straight grooves (22) are uniformly distributed on the outer surfaces of the first giant magnetostrictive rod (8) and the second giant magnetostrictive rod (10) along the circumferential direction.
5. The giant magnetostrictive actuator according to claim (1), wherein the pre-tightening device comprises a top cover (12), a pre-tightening nut (13) and a pre-tightening spring (14), the top cover (12) is arranged at the top end of the shell (1), the pre-tightening nut (13) is screwed on the top cover (12), a through hole is formed in the pre-tightening nut (13), the output ejector rod (11) penetrates through the through hole in the pre-tightening nut (13) and extends to the outer side of the top cover (12), and the pre-tightening spring (13) is sleeved on a section of outer wall, located inside the shell (1), of the output ejector rod (11).
6. A giant magnetostrictive actuator according to claim 1, characterized in that the positioning means comprise an adjusting bolt (21), the top end of the adjusting bolt (21) extending into the housing (1) and being fixedly connected to the closed section of the U-shaped cylinder (9).
7. The giant magnetostrictive actuator according to claim 1, characterized in that the housing (1), the base (2), the bobbin (3), the lowering base (2), the bobbin (3), the U-shaped cylinder (9) and the output plunger (11) are made of magnetic conductive materials.
8. The giant magnetostrictive actuator according to claim 1, characterized in that the detection device comprises a support base (23) and a support (24), the support base (23) and the support (24) are connected through a bolt, a displacement sensor (25) for displacement detection and a pressure sensor (26) for pressure detection are arranged on the support (24), the giant magnetostrictive actuator is respectively connected with the displacement sensor (25) and the pressure sensor (26) through an output ejector rod (11), the displacement sensor (25) and the pressure sensor (26) are both connected with a signal amplification device (27), the signal amplification device (27) is connected with a signal acquisition device (28), the signal acquisition device (28) is connected with a computer, and when the output ejector rod (11) outputs displacement and force, voltage changes generated by the displacement sensor (25) and the pressure sensor (26) are amplified by the signal amplification device (27) and then transmitted And the signal acquisition device (28) transmits the data to the computer (29) by the signal acquisition device (28) for quick and accurate test and subsequent processing and analysis of the data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810927063.XA CN110838802A (en) | 2018-08-15 | 2018-08-15 | Giant magnetostrictive driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810927063.XA CN110838802A (en) | 2018-08-15 | 2018-08-15 | Giant magnetostrictive driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110838802A true CN110838802A (en) | 2020-02-25 |
Family
ID=69572886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810927063.XA Pending CN110838802A (en) | 2018-08-15 | 2018-08-15 | Giant magnetostrictive driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110838802A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111504442A (en) * | 2020-04-27 | 2020-08-07 | 天津恒立远大仪表股份有限公司 | Tuning fork switch probe structure |
| CN111641348A (en) * | 2020-06-15 | 2020-09-08 | 重庆大学 | High-precision force/position control driving device |
| CN115200851A (en) * | 2022-07-22 | 2022-10-18 | 福州大学 | Test bench for modularly measuring output performance and magnetic flux leakage of magnetostrictive actuator |
| CN115556085A (en) * | 2022-09-26 | 2023-01-03 | 苏州大学 | Water-cooled magnetic robot driving and controlling device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200962571Y (en) * | 2006-10-25 | 2007-10-17 | 武汉理工大学 | Combined temperature control ultra-magnetic telescopic driver |
| CN102231610A (en) * | 2011-07-11 | 2011-11-02 | 南京航空航天大学 | Giant magnetostrictive cylinder and rod composite driving actuator and working method thereof |
| CN102255555A (en) * | 2011-07-11 | 2011-11-23 | 南京航空航天大学 | Permanent magnet dual-coil-driven giant magnetostrictive actuator and working method thereof |
| CN203859703U (en) * | 2014-03-14 | 2014-10-01 | 昆明理工大学 | Water hydraulic relief valve giant magnetostrictive driver |
| CN104678212A (en) * | 2015-01-29 | 2015-06-03 | 上海应用技术学院 | Static performance test system of giant magnetostrictive actuator |
-
2018
- 2018-08-15 CN CN201810927063.XA patent/CN110838802A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200962571Y (en) * | 2006-10-25 | 2007-10-17 | 武汉理工大学 | Combined temperature control ultra-magnetic telescopic driver |
| CN102231610A (en) * | 2011-07-11 | 2011-11-02 | 南京航空航天大学 | Giant magnetostrictive cylinder and rod composite driving actuator and working method thereof |
| CN102255555A (en) * | 2011-07-11 | 2011-11-23 | 南京航空航天大学 | Permanent magnet dual-coil-driven giant magnetostrictive actuator and working method thereof |
| CN203859703U (en) * | 2014-03-14 | 2014-10-01 | 昆明理工大学 | Water hydraulic relief valve giant magnetostrictive driver |
| CN104678212A (en) * | 2015-01-29 | 2015-06-03 | 上海应用技术学院 | Static performance test system of giant magnetostrictive actuator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111504442A (en) * | 2020-04-27 | 2020-08-07 | 天津恒立远大仪表股份有限公司 | Tuning fork switch probe structure |
| CN111641348A (en) * | 2020-06-15 | 2020-09-08 | 重庆大学 | High-precision force/position control driving device |
| CN115200851A (en) * | 2022-07-22 | 2022-10-18 | 福州大学 | Test bench for modularly measuring output performance and magnetic flux leakage of magnetostrictive actuator |
| CN115556085A (en) * | 2022-09-26 | 2023-01-03 | 苏州大学 | Water-cooled magnetic robot driving and controlling device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110838802A (en) | Giant magnetostrictive driver | |
| CN102231610B (en) | Giant magnetostrictive cylinder and rod composite driving electromechanical converter and working method thereof | |
| CN102255555B (en) | Permanent magnet dual-coil-driven giant magnetostrictive actuator and working method thereof | |
| CN101145742B (en) | A dual-phase set ultra-magnetism flexible driver and its implementation method | |
| Bica et al. | Physical characteristics of magnetorheological suspensions and their applications | |
| CN106402227B (en) | A kind of intelligence current vortex sensing damping unit | |
| CN108167264A (en) | A kind of variation rigidity hydraulic drive mechanism and its variation rigidity regulation and control method based on giant magnetostrictive material | |
| CN106401941B (en) | A kind of high accuracy using the driving of temperature control marmem has valve Micropump | |
| CN101153824A (en) | Magnetostrictive stress sensor | |
| CN110513419B (en) | Adjustable quasi-zero stiffness vibration isolator based on magnetic circuit design | |
| Xue et al. | Design and experimental study of a novel giant magnetostrictive actuator | |
| CN103840703A (en) | Annular finned giant magnetostrictive actuator device | |
| CN201113829Y (en) | Double phase opposed giant magnetostriction driver | |
| JP2000275313A (en) | Instrument and method for measuring characteristic of magnetic recording medium | |
| Zhao et al. | Study on the rare-earth giant magnetostrictive actuator based on experimental and theoretical analysis | |
| CN105864491B (en) | A kind of straight drive valve is driven with ultra-magnetic telescopic and displacement amplification device | |
| CN206321365U (en) | Pre-profiling force sensor data harvester based on magnetic shape memory alloy | |
| CN104467527A (en) | Rare-earth giant-magnetostrictive energy converter with flexible hinge micro-displacement compound operational amplifier | |
| CN203859703U (en) | Water hydraulic relief valve giant magnetostrictive driver | |
| CN211089970U (en) | MEMS sensor and electronic equipment | |
| CN205120279U (en) | Premolding magnetic induced shrinkage or elongation force transducer | |
| Shen et al. | Effect of temperature on characteristics of rare earth-doped magneto-optical glass in optical current transducer application | |
| CN203788192U (en) | Annular fin type giant magnetostrictive actuator device | |
| CN101150290B (en) | A wide temperature domain huge magnet driven flexible magnetism controlled driver | |
| CN104184361A (en) | Micro displacement drive system design based on giant magnetostrictive materials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200225 |