Servo spool and processing method thereof

Abstract

A servo valve element comprises an element body. An upper centre auxiliary hole is formed in one end of the element body, and a lower centre auxiliary hole is formed in the other end of the element body. A left inclined face and a right inclined face are milled on the element body and are crossed to form a feedback rod ball head cavity used for preventing a feedback rod from interfering with the operation of the valve element. A limiting pin hole is formed in the upper portion of the element body, and the limiting pin hole penetrates through the rotation center line of the valve element and penetrates through the valve element in the radial direction. A valve element reset force acting face is milled at the lower portion of the element body to form a reset base cavity, a reset base is inserted in the reset base cavity, meanwhile, the valve element reset force acting face is in circular arc transition connection with the reset base cavity to form a reset circular arc, and the operating resistance is greatly reduced. A left oil passing sink groove and a right oil passing sink groove are symmetrically formed about the valve element rotation center line of the element body. The left oil passing sink groove is internally provided with a left V-shaped oil passing groove, the right oil passing sink groove is internally provided with a right V-shaped oil passing groove, control pressure oil is conducted and enters a servo cylinder through a servo valve sleeve and a valve oil path, and the servo cylinder is pushed to run.

Description

technical field [0001] The invention relates to the technical field of servo control systems, in particular to a servo valve core and a processing method thereof. Background technique [0002] As the core conversion element of the servo control system, the performance of the servo valve directly affects the accuracy and stability of the entire control system. The servo valve core is installed in the servo valve body and its rotation is controlled by an external joystick. However, the currently used servo spool tends to interfere with the feedback lever during operation, and when the external joystick manipulates the servo spool to rotate around its center of rotation, the manipulation resistance is large, and the effect of resetting and fitting is not ideal, which in turn affects the servo. The service life of the spool; at the same time, the control oil port of the servo spool is located on the same side as the oil passage of the servo valve sleeve. Enter the servo cylinde...

AI Technical Summary

Problems solved by technology

However, the currently used servo spool tends to interfere with the feedback lever during operation, and when the external joystick manipulates the servo spool to rotate around its center of rotation, the manipulation resistance is large, and the effect of resetting and fitting is not ideal, which in turn affects the servo. The service life of the spool; at the same time, the control oil port of the servo spool is located on the same side as the oil passage of the servo valve sleeve. Enter the servo cylinder through the servo valve sleeve and the oil passage of the valve body to drive the servo cylinder to run

In addition, during the assembly process of the servo valve core, the assembly gap and size between each component are equally important. If the assembly gap is too large, the operation will generate noise, which will not only cause environmental pollution, but also affect the transmission performance between each component; equipment If the gap is too small, it will directly cause damage to the internal components of the servo valve core, which is prone to failure

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