Mass flow high-frequency direct-acting electro-hydraulic servo valve based on great magnetostriction converter

Abstract

The invention discloses a mass flow high-frequency direct-acting electro-hydraulic servo valve based on a great magnetostriction converter, and belongs to the technology field of hydraulic servo control. The mass flow high-frequency direct-acting electro-hydraulic servo valve comprises a valve body (24), a great magnetostriction converter arranged above the valve body (24), a micrometric displacement mechanism, a shell (4), and slide valve resetting and balancing devices. The micrometric displacement mechanism and the shell (4) are arranged on the left sides of the valve body (24) and the great magnetostriction converter, and the slide valve resetting and balancing devices are arranged inside and on the left side of the valve body (24). A pre-compression mechanism, a cooling system and a heat compensation mechanism are arranged on the great magnetostriction converter, amplification and transmission of outputted displacement are realized by utilizing the micrometric displacement mechanism based on a leverage theory, a valve plug is driven to generate displacement, and the servo valve is enabled to output control flow in proportion with drive current. The servo valve has the advantages of quick response, wide bandwidth, big control flow, strong anti-pollution capacity and the like.

Description

technical field [0001] The invention relates to the application of giant magnetostrictive materials, in particular to a large-flow high-frequency direct-acting electro-hydraulic servo valve based on a giant magnetostrictive converter, which belongs to the technical field of hydraulic servo control. Background technique [0002] Compared with traditional two-stage and multi-stage electro-hydraulic servo valves, direct-acting electro-hydraulic servo valves have the advantages of simple structure, fast response, strong anti-pollution ability, high reliability, low price, and characteristics that are not affected by oil supply pressure, etc. It has become one of the research hotspots in the field of fluid transmission and control. The traditional direct-acting electro-hydraulic servo valve uses a force motor to directly drive the spool of the servo valve. Due to the low bandwidth, response speed, and small output force of the force motor, the traditional direct-acting electro-hy...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to aim at the defects existing in the existing traditional direct-acting electro-hydraulic servo valve, and to design an automatic thermal compensation super- The spool of the servo valve is driven by a magnetostrictive converter and a displacement amplifying mechanism, and a high-flow high-frequency direct-acting electro-hydraulic servo valve based on a giant magnetostrictive converter is proposed in order to improve the response speed, bandwidth, and accuracy and simplify the structure of the servo valve, etc.

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