Dynamic permanent magnetic field driving type ultra-magnetostrictive actuator

Abstract

The invention relates to a dynamic permanent magnetic field driving type ultra-magnetostrictive actuator. The two parts of the machine body are symmetrically mounted together along the center, and the two parts of the machine body are connected and tightened through double end studs and nuts; the upper end plane of the machine body is in contact with the lower end plane of a flange on the inner side of an external bracket; a driving gear shaft is mounted on the lower part of the external bracket; a driving shaft deep groove ball bearing is mounted between the lower end of the driving gear shaft and the external bracket; a driving gear is mounted at the upper end of the driving gear shaft; a driving check ring is tightly screwed on the driving gear shaft for axially fixing the driving gear shaft; the driving gear is meshed with two driven gears; the two parts of the external bracket are symmetrically mounted together along the center; the double end studs are mounted in counterbore holes in the two sides of the external bracket; and the two parts of the external bracket are fastened through the nuts. According to the dynamic permanent magnetic field driving type ultra-magnetostrictive actuator, due to the combination of the permanent magnets and a mechanical rotary mechanism, an excitation mode for generating a dynamic alternating magnetic field by the movement of the permanent magnets is formed; and the shortcomings of high power, huge heating amount, large size and the like of the driving power supply adopting an electromagnetic coil excitation mode are avoided.

Description

technical field [0001] The invention belongs to the field of magnetostrictive actuators, in particular to a giant magnetostrictive actuator which drives giant magnetostrictive rods to vibrate at high frequency by means of a permanent magnet generating a dynamic alternating magnetic field. Background technique [0002] Giant magnetostrictive material is a new type of functional material. It is a kind of metal compound with extremely strong magnetostrictive effect at room temperature. Its typical representative is Tb 0.27 Dy 0.73 Fe 1.95 and T 0.7 Dy 0.73 Fe 2 , the trade name is Terfenol-D. As a new type of high-efficiency magnetic energy-mechanical energy conversion material, compared with ordinary magnetostrictive materials (such as cobalt, nickel) and piezoelectric materials (such as PZT) and other materials, it has large strain, high efficiency power density, high precision, The advantages of fast response and high reliability. [0003] When ferromagnetic materials...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of high heat generation, large volume and low efficiency of the electromagnetic coil-driven giant magnetostrictive actuator, the present invention designs a giant magnetostrictive rod as the core component and uses a high-speed rotating permanent magnet as the dynamic alternating magnetic field source, a dynamic permanent magnetic field-driven giant magnetostrictive actuator that makes giant magnetostrictive rods vibrate at high frequencies

Images