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Single-stage direct drive type electro-hydraulic servo valve driven by giant magnetostrictive actuator

A giant magnetostrictive, electro-hydraulic servo valve technology, applied in servo motor components, fluid pressure actuating devices, mechanical equipment, etc., can solve the problems of small stroke, small control flow of servo valve, etc. The effect of large traffic and fast response speed

Inactive Publication Date: 2011-05-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the same type of electro-hydraulic servo valve, its frequency response has been significantly improved, but because the GMM rod has no micro-displacement amplification, its stroke is small, so the control flow rate of this servo valve is small, only 2L / min

Method used

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  • Single-stage direct drive type electro-hydraulic servo valve driven by giant magnetostrictive actuator
  • Single-stage direct drive type electro-hydraulic servo valve driven by giant magnetostrictive actuator
  • Single-stage direct drive type electro-hydraulic servo valve driven by giant magnetostrictive actuator

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Embodiment Construction

[0033] like figure 1 , 2, 3, 4, 5, 6, and 7, the new single-stage direct-acting electro-hydraulic servo valve is divided into a single giant magnetostrictive actuator drive (such as figure 1 shown) and double giant magnetostrictive actuator drive (such as figure 2 Shown) two structural forms, single-stage direct-acting electro-hydraulic servo valve driven by a single giant magnetostrictive actuator is planned to install a giant magnetostrictive actuator and a micro-displacement amplifier on one side of the slide valve, Install the slide valve reset zero adjustment device (such as Figure 5 shown). The single-stage direct-acting electro-hydraulic servo valve driven by double giant magnetostrictive actuators plans to install giant magnetostrictive actuators and their micro-displacement amplifiers on both sides of the slide valve, and the slide valve is driven by giant magnetostrictive actuators Core to replace the traditional single-stage direct-acting electro-hydraulic serv...

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Abstract

A single-stage direct drive type electro-hydraulic servo valve driven by a giant magnetostrictive actuator belongs to the technical field of hydraulic servo control. The single-stage direct drive type electro-hydraulic servo valve comprises a valve body (25), a slide valve couple, an electro-mechanical converter and a micrometric displacement amplifier located between the electro-mechanical converter and the slide valve couple. The above electro-mechanical converter comprises a thermal compensation cover (12), a giant magnetostrictive rod (13) arranged in the thermal compensation cover, a coil framework (2) located at the external side of the thermal compensation cover (12), and a drive coil (4) and a bias coil (3) which are wound around the external side of the coil framework (2) in sequence. Compared with traditional motor drive method, the invention has the characteristics of large drive power and quick response speed.

Description

technical field [0001] The invention relates to the application of giant magnetostrictive materials and belongs to the technical field of hydraulic servo control. Background technique [0002] The traditional two-stage electro-hydraulic servo valve is expensive, the manufacturing process is complicated, and it has strict requirements on the use environment. The single-stage direct-acting electro-hydraulic servo valve has the advantages of simple structure, low price, fast response, strong anti-pollution ability, high reliability, no pilot stage leakage, and characteristics not affected by oil supply pressure. It has become a fluid transmission and control valve. An important development direction and competition focus in the field. Therefore, the development of direct-acting single-stage electro-hydraulic servo valve will help to improve the performance index of electro-hydraulic servo valve, improve the control characteristics of electro-hydraulic servo valve control syste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/02
Inventor 朱玉川李跃松鲍和云
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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