Bourdon tube force feedback type 2D electrical-hydraulic pressure servo valve

Abstract

The invention relates to a bourdon tube force feedback type 2D electrical-hydraulic pressure servo valve. The bourdon tube force feedback type 2D electrical-hydraulic pressure servo valve is characterized by comprising a valve body module, an electrical-mechanical converter module, a transmission mechanism module and a bourdon tube feedback module; the bourdon tube feedback module is matched with the valve body module and the electrical-mechanical converter module; the electrical-mechanical converter module is matched with the valve body module through the transmission mechanism module; and the bourdon tube feedback module monitors the displacement of a valve core in the valve body module and an electrical signal of a rotary electromagnet of the electrical-mechanical converter module in real time, and closed loop feedback is formed. The deflection angle of the rotary electromagnet is controlled through the magnitude of input currents, thus the deflection angle of the valve core is changed, the axial movement distance is achieved through the 2D valve core, so that the opening size of a control valve is controlled, and control over outlet pressure is achieved. Structurally, an original two-level or multilevel structural form is simplified greatly, and the requirements for industrial simplicity and compactness are met.

Description

technical field [0001] The invention belongs to an electro-hydraulic servo valve in the field of fluid transmission and control, in particular to a Bourdon tube force feedback type 2D electro-hydraulic pressure servo valve. Background technique [0002] The electro-hydraulic servo control technology organically combines the advantages of fluid transmission control technology and information electronic technology. It has the advantages of high power amplification, fast response, small dead zone, and continuous two-way control of output flow and pressure. It is used in aerospace, high-end equipment, etc. , Ships and other important national strategic industries have been widely used. The electro-hydraulic pressure servo valve is an important and ideal servo component in the force control system. It is a hydraulic control valve that accepts analog electric control signals, and the output pressure changes with the magnitude and polarity of the electric control signals and respon...

AI Technical Summary

Problems solved by technology

At present, the hydraulic brake system of aircraft mostly uses nozzle baffle type pressure servo valve, and the valve is mainly imported; this valve has the advantages of small size, small inertia, fast response, high sensitivity, etc. Clogged nozzles cause brake failure, which is the main cause of current aircraft brake system failure

The jet tube type pressure servo valve has the advantages of strong anti-pollution ability and low failure rate, but it has larger leakage and slower dynamic response than the previous one; Viscosity is very sensitive, and it is obviously insufficient to use in low temperature and extreme environment

[0004] Due to the high price of the pressure servo valve and the harsh application environment, electro-hydraulic proportional pressure control components are often used in the occasions where the accuracy is not high in actual production, such as electro-hydraulic proportional pressure reducing valves and proportional relief valves. The linear displacement sensor LVDT measures the position of the spool and controls it in a closed loop, forming an electric feedback type direct-acting proportional pressure control valve, which can greatly improve the positioning stiffness of the spool and the control accuracy of the output force, and is used to replace the electro-hydraulic pressure control valve. The servo valve realizes the control of the system force, but the control accuracy and response speed are inferior to the servo valve

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