Giant Magnetostrictive Micro-displacement Actuator with Displacement Amplification and Hold
A technology of giant magnetostriction and displacement amplification, which is applied in the direction of piezoelectric effect/electrostriction or magnetostrictive motors, generators/motors, electrical components, etc., and can solve the problems that giant magnetostrictive rods affect the accuracy of drives , to avoid the impact, expand the output range, reduce the effect of heat
Inactive Publication Date: 2015-09-30
NANTONG UNIVERSITY
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Problems solved by technology
In addition, giant magnetostrictive materials have a large thermal expansion coefficient, and the thermal expansion coefficient of domestic giant magnetostrictive materials is 12×10 -6 / °C, which is in the same order of magnitude as the magnetostrictive coefficient, which indicates that the thermal elongation of the giant magnetostrictive rod due to temperature rise will seriously affect the accuracy of the drive
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[0026] The present invention will be further described now in conjunction with accompanying drawing. These drawings are simplified schematic diagrams only to illustrate the basic structure of the present invention in a schematic way, so they only show the components relevant to the present invention.
[0027] Such as figure 1 As shown, a giant magnetostrictive micro-displacement actuator with displacement amplification and holding functions has a base 1, a box 9 is installed on the base 1, a coil sleeve 19 is installed at the bottom of the inner cavity of the box 9, and the coil The cylindrical part of the sleeve 19 has a driving coil 4 outside, and a giant magnetostrictive rod 21 is installed inside the cylindrical part of the coil sleeve 19. The top of the giant magnetostrictive rod 21 has a push rod 20, and a magnifying rod 20 is arranged above the push rod 20. Mechanism 5, a displacement holding mechanism is connected above the amplification mechanism 5, and a pressing sl...
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The invention relates to a super magnetostrictive micro-displacement actuator with displacement amplifying and keeping functions. The super magnetostrictive micro-displacement actuator comprises a base, wherein the base is provided with a box body; the bottom of the inner cavity of the box body is provided with a coil sleeve; the outer part of the cylindrical part of the coil sleeve is provided with a drive coil; the cylindrical part of the coil sleeve is internally provided with a super magnetostrictive rod; the top of the super magnetostrictive rod is provided with an ejector rod; an amplifying mechanism is arranged above the ejector rod; a displacement keeping mechanism is connected with the upper part of the amplifying mechanism; a pressing and fixing sleeve is arranged above the displacement keeping mechanism; the upper part of the pressing and fixing sleeve is provided with an end cover connected with the box body; and the end cover is internally provided with an output ejector rod. According to the invention, when displacement output is performed, the displacement is amplified and the output of the displacement is kept, so that the influence of heat produced by the drive coil on the super magnetostrictive rod is avoided.
Description
technical field [0001] The invention relates to a giant magnetostrictive micro-displacement actuator with displacement amplification and maintenance functions, which can be applied to displacement control in mechanical processing, precision instruments and the like. Background technique [0002] In 1840, Joule discovered that when a magnetic body is magnetized, its dimensions will change. This is what is commonly referred to as the magnetostrictive effect, also known as the Joule effect. It was not until the 1940s that people began to use Ni or Co crystals, and their magnetostriction coefficients were only 40×10 -6 . In the 1960s, ferrite materials were adopted one after another, and their magnetostriction can reach up to 110×10 -6 , and their electro-acoustic conversion efficiency is 2 to 5 times that of Ni and other metals. The advent of these materials one after another, although some achievements have been made at that time, their applications are still limited due to...
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IPC IPC(8): H02N2/02H02N2/04
Inventor 邓勇刘宁陆观赵世杰张永芹
Owner NANTONG UNIVERSITY