Two-stage electro-hydraulic servo valve based on giant magnetostrictive electro-mechanical actuator GMA

A giant magnetostrictive and electro-hydraulic servo valve technology, which is applied in the direction of mechanical equipment, servo motor components, fluid pressure actuators, etc., can solve the problems of inaccurate control, slow response speed, poor stability, etc., and achieve structural Simple, fast response, and the effect of improving conversion efficiency

Inactive Publication Date: 2012-12-05
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research of micro-displacement drivers mainly focuses on the application of electrostrictive material PMN and shape memory alloy SMA. The driver based on electrostrictive material PMN has a high operating bandwidth, but the output displacement is small, and

Method used

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  • Two-stage electro-hydraulic servo valve based on giant magnetostrictive electro-mechanical actuator GMA

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing.

[0020] As shown in the attached figure, the two-stage electro-hydraulic servo valve of the giant magnetostrictive electro-mechanical converter GMA consists of three parts: the giant magnetostrictive driver, the pre-stage of the nozzle-flapper valve, and the slide valve power stage. The role of the giant magnetostrictive driver is to convert the current signal into the deflection of the baffle of the nozzle baffle hydraulic amplifier.

[0021] First, the preload is applied to the giant magnetostrictive GMM rod 19 by adjusting the screw 22, and a certain amount of current is passed into the bias coil 18 to eliminate the frequency doubling phenomenon, so that the magnetostrictive strain of the giant magnetostrictive GMM rod 19 is in the linear region. And ensure that the giant magnetostrictive GMM rod 19 works under the selected static pressure state. At this time, the hinged ...

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Abstract

The invention discloses a two-stage electro-hydraulic servo valve based on a giant magnetostrictive electro-mechanical actuator GMA and belongs to the technical field of hydraulic servo control. The two-stage electro-hydraulic servo valve comprises a valve body (3), a valve core (4), a left spray nozzle (6), a right spray nozzle (7), a hinged baffle (11), a feedback rod (5) and a giant magnetostrictive actuator. The giant magnetostrictive actuator comprises a left end cover (9), a centering and adjusting screw (8), a centering spring (10), an end cover (13), a right end cover (21), a butterfly-shaped spring (14), an output rod (15), an adjusting screw (22) and a giant magnetostrictive rod (19). The output rod (15) is connected with the hinged baffle (11); and through the hinged baffle (11) with one fixed end, the amplification and the transfer of displacement are realized. A force feedback secondary servo valve is formed by the hinged baffle (11) with a displacement amplification function, the feedback rod (5), a prestage spray nozzle-baffle valve and a power-stage slide valve. The two-stage electro-hydraulic servo valve based on the giant magnetostictive electro-mechanical actuator GMA has the characteristics of quick response, high frequency response, high control flow rate and the like.

Description

technical field [0001] The invention relates to the technical field of hydraulic servo control, in particular to a two-stage electro-hydraulic servo valve of a giant magnetostrictive electric-mechanical converter GMA. Background technique [0002] The electro-hydraulic servo valve is the core part of the electro-hydraulic servo system, connecting electrical components and hydraulic mechanical components, and its performance will directly affect the working performance of the entire system. The traditional electro-hydraulic servo valve is driven by an electromagnetic torque motor. Due to its large volume and weight, limited working bandwidth, low energy density, slow response speed, and poor anti-interference ability, it can no longer meet the requirements of modern industry for fluid control systems. To improve the performance of the electro-hydraulic servo control system, the bandwidth and response speed of its electro-mechanical converter must be improved. With the develo...

Claims

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Application Information

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IPC IPC(8): F15B13/02
Inventor 王传礼周禾清邓海顺刘浩邱大龙
Owner ANHUI UNIV OF SCI & TECH
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