Small-sized, high frequency and high linearity jet deflection plate type electro-hydraulic servo valve and using method thereof

Abstract

The invention discloses a small-sized, high frequency and high linearity jet deflection plate type electro-hydraulic servo valve. The electro-hydraulic servo valve comprises a shell, wherein a shell jet hole, a shell left receiving hole, a shell right receiving hole and a shell center hole are formed in the upper surface of the shell; a primary seat component is mounted above the shell center hole; the primary seat component comprises a primary seat, an upper pressing block, a jet flow piece, locating pins and a lower pressing block; the jet flow piece is positioned between the upper pressingblock and the lower pressing block; the jet flow piece, the upper pressing block and the lower pressing block are coaxially arranged; the locating pins enable the jet flow piece, the upper pressing block and the lower pressing block to be fixedly connected to the center of the primary seat; a armature component is mounted at the center of the primary seat component; the armature component comprises an armature, a spring tube and a deflection plate feedback rod; the armature is perpendicular to the top end of the spring tube; the two arms of the armature are positioned on the two sides of the spring tube symmetrically; and the deflection plate feedback rod is positioned at the lower end of the spring tube. The small-sized, high frequency and high linearity jet deflection plate type electro-hydraulic servo valve has the advantages that the size is small, the weight is low and the inner leakage is little. The invention further discloses a using method of the small-sized, high frequency and high linearity jet deflection plate type electro-hydraulic servo valve.

Description

technical field [0001] The invention relates to the technical field of electro-hydraulic servo valves. More specifically, it is a small-volume high-frequency high-linearity jet deflection plate electro-hydraulic servo valve. The invention also relates to a method for using a small-volume high-frequency high-linearity jet deflection plate type electro-hydraulic servo valve. Background technique [0002] With the advancement of science and technology, hydraulic servo systems are more and more widely used, and electro-hydraulic servo valves are very important and indispensable components of hydraulic servo systems, and their static and dynamic performance directly affect the performance of hydraulic servo systems. [0003] Since the nozzle baffle electro-hydraulic servo valve was successfully researched and applied in industry, aviation and other fields, the stability of the hydraulic servo system has been greatly improved, but the valve has a high requirement for the cleanlin...

AI Technical Summary

Problems solved by technology

[0003] Since the nozzle baffle electro-hydraulic servo valve was successfully researched and applied in industry, aviation and other fields, the stability of the hydraulic servo system has been greatly improved, but the valve has a high requirement for the cleanliness of the working medium. If the working medium is slightly polluted or If the filtration accuracy is not high, the valve will be blocked and lose its working ability

[0004] At the same time, the jet tube type electro-hydraulic servo valve adopts electric feedback to increase the volume of the valve, which is not suitable for harsh environments such as humid environment. Valve Department, Seminar on Jet Tube Electro-hydraulic Servo Valve [J]. Hydraulics and Pneumatics, 2009 (11): 86-88.), but the feedback lever is a single-rod type, and the force is unbalanced, which affects the movement of the jet tube

[0005] The existing application number is 201520887029.6, and the patent name is "An Electric Feedback Deflector Jet Electro-hydraulic Servo Valve" and the application number is 201510750433.3, and the patent name is "A Deflector Jet Electro-hydraulic Servo Valve Based on Piezoelectric Structure". Disadvantages of heavy weight, large volume and large internal leakage

[0006] In summary, there are the following problems in the field of electro-hydraulic servo valves: (1) high requirements on the working medium, servo valves are easily blocked, large internal leakage, and short service life; (2) servo valves are large in size and weight Narrow range; (3) Slow dynamic response and poor linearity

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