Direct acting 2d electro-hydraulic pressure servo valve

Abstract

The invention relates to a direct driving type 2D electro-hydraulic pressure servo valve. The direct driving type 2D electro-hydraulic pressure servo valve is characterized in that the direct driving type 2D electro-hydraulic pressure servo valve is composed of a valve body module, an electromechanical converter module, a transmission mechanism module and a displacement sensor module, wherein the displacement sensor module is matched with the valve body module, the electromechanical converter module is matched with the valve body module, and the displacement sensor module is used for monitoring the displacement of a 2D piston in the valve body module in real time so as to form closed loop feedback together with an electric signal of a rotary magnet of the electromechanical converter module. According to the direct driving type 2D electro-hydraulic pressure servo valve, the axial movement distance of a valve core is changed by controlling the deflection angle of the rotary magnet, so that spring force is changed so as to adjust the pressure of the system, an original two-stage or multistage structural form is greatly simplified structurally, and the industry requirements of simplicity and compactness are satisfied.

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 direct-acting 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, cutting-edge weapons, etc. , iron and steel, electric power generation and other important national strategic military industry fields 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 el...

AI Technical Summary

Problems solved by technology

[0003] At present, the electro-hydraulic pressure servo valves are mainly two types of nozzle baffle type and jet tube type pressure servo valves, but the technology is mostly monopolized by foreign countries; the most widely used pressure servo valves in China are mainly two-stage or three-stage electro-hydraulic pressure servo valves. Servo valves, these servo valves have excellent performance, but they are extremely complex in structure, difficult to manufacture, and the service conditions are quite harsh, requiring high oil cleanliness and high failure rate

[0004] Due to various deficiencies of pressure servo valves, electro-hydraulic proportional pressure control components, such as electro-hydraulic proportional pressure reducing valves and overflow valves, are often used in situations where the accuracy is not high in actual production, and linear displacement sensors (LVDT) are used to control The position of the spool is measured and closed-loop controlled to form 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 servo valve to realize control of the system. force control, but the control accuracy is slightly inferior

Images