Pilot hydraulic corner self-servo valve

Abstract

The invention provides a pilot hydraulic corner self-servo valve. The pilot hydraulic corner self-servo valve comprises a connecting disc, a steering engine cover, a left end cover, a cylinder block,a steering engine, a pilot valve, a main valve and a right end cover; the pilot valve comprises a pilot valve sleeve, a pilot valve element, a pilot valve body, a pilot fixed stopper and a pilot blade; the main valve comprises a main valve sleeve, a main valve element, a main valve body, a fixed stopper and a main blade; the connecting disc is mounted at the left end of the steering engine cover;the pilot valve body is concentrically mounted in a cylindrical cavity formed in the left end cover; the right end of the left end cover is mounted at the left end of the cylinder block; the right endcover is mounted at the right end of the cylinder block; and an output shaft of the main valve penetrates through the right end cover, and extends out. The pilot hydraulic corner self-servo valve hasthe characteristics of simple structure, easy machining, balanced stress of the valve element, high output torque, high transmission ratio efficiency, good power characteristics, linear flow gain, high response speed and high control precision.

Description

technical field [0001] The invention belongs to the technical field of servo valves, in particular to a pilot-operated hydraulic angle self-servo valve. Background technique [0002] The hydraulic angle servo technology is a combination of hydraulic pressure and motor technology. Using their respective advantages, the small torque of the motor directly drives the valve core to open the valve port, allowing high-pressure oil to act on the valve body, thereby obtaining a large output torque. The hydraulic angle self-servo valve is the core component of the hydraulic control system. It has the characteristics of high precision and fast response. It is widely used in high-precision mechatronics systems, aerospace airborne drive systems, and large-scale test equipment. Therefore, Get the attention of scientific and technological personnel at home and abroad. [0003] At present, associate professor Zhu Xinglong of Yangzhou University in China and others put forward the concept o...

AI Technical Summary

Problems solved by technology

[0004] The patent application with the application number 201210033081.6 discloses an easy-to-control hydraulic angle self-servo valve, which overcomes the above-mentioned problems. , good dynamic characteristics, small servo blind zone and easy control, but there are complex structures, especially there are many complicated inner oil passages inside the valve core and valve sleeve, it is difficult to guarantee the machining accuracy, and there are still insufficient output torques and the use of The design of the circular valve port causes its flow gain to be non-linear, which in turn leads to the problem of insufficient precision.

[0005] The patent application with the application number 201710035559.1 discloses a corner self-servo passive compliant hydraulic robot joint. The internal drive of the robot joint is directly driven by the steering gear to drive the valve body to realize the movement of the joint. This is a first-stage transmission. The flexibility is still insufficient; the valve core, valve sleeve and valve body are not compact enough in the axial direction, too many annular grooves will cause the structure of the parts to deform easily and the response speed is not fast enough; the four threaded holes of the fixed stopper of this joint are directly It is opened on the arc surface of the fixed block, so the fastening screws that cooperate with the fixed block are in contact with the flat surface and the arc surface, and the fit is bound to be loose, and the life of the screw will be shortened

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