Two-stage slide valve electro-hydraulic servo valve driven by giant magnetostrictive actuator

A giant magnetostrictive and electro-hydraulic servo valve technology, which is applied in the direction of servo motor components, fluid pressure actuators, mechanical equipment, etc., can solve the problems of small stroke and small flow rate of servo valve control, and achieve high driving power and control The effect of large flow and fast response

Inactive Publication Date: 2012-01-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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  • Claims
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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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  • Two-stage slide valve electro-hydraulic servo valve driven by giant magnetostrictive actuator
  • Two-stage slide valve electro-hydraulic servo valve driven by giant magnetostrictive actuator
  • Two-stage slide valve electro-hydraulic servo valve driven by giant magnetostrictive actuator

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Embodiment Construction

[0026] Such as figure 1 , 2, 3, 4, 5, and 6, the new two-stage slide valve 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, the two-stage spool type 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 spool valve, Install the spool valve reset device (such as Figure 4 shown). The two-stage slide valve electro-hydraulic servo valve driven by double giant magnetostrictive actuators is planned to install giant magnetostrictive actuators and their micro-displacement amplifiers on both sides of the slide valve, and the slide valve pilots are driven by giant magnetostrictive actuators. The spool is used to replace the traditional two-stage slide valve electro-hydraulic servo valv...

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Abstract

A two-stage slide valve electro-hydraulic servo valve driven by a giant magnetostrictive actuator belongs to the technical field of hydraulic servo control. The two-stage slide valve electro-hydraulic servo valve comprises a valve body (26), a main valve plug (5), a pilot valve plug (6), a giant magnetostrictive actuator, a micrometric displacement amplifier located between the giant magnetostrictive actuator and the pilot valve plug (6); the above giant magnetostrictive actuator comprises a thermal compensation cover (12), a giant magnetostrictive rod (13) arranged in the thermal compensation cover, a coil framework 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; and the servo valve 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 usually has a nozzle flapper valve as its front stage, and the movement of the nozzle flapper is generally driven by a torque motor. It has the advantages of low zero drift and pressure, and has the disadvantages of poor anti-pollution ability, large internal leakage, large power loss, and low efficiency; the two-stage electro-hydraulic servo valve with a spool valve as the pre-stage is called a spool-type two-stage electro-hydraulic servo valve. Servo valve, whose pre-stage control spool is generally driven by a moving coil force motor, has the advantages of simple structure, small hysteresis, large working stroke, and strong anti-pollution ability. Large, low response, requiring large drive power and other disadvantages. Impro...

Claims

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Application Information

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