Servo valve element drive switching structure

Abstract

The invention relates to a servo valve element drive switching mechanism which comprises a valve body, a valve sleeve, a valve element and a servo motor, wherein the valve sleeve is arranged in the valve body and fixedly connected to the valve body, the valve element is movably connected in the valve sleeve in a matched mode, and the valve element can axially move in the valve sleeve; the middle of the valve element is of a hollow structure, an elastic shaft with a circular ring is arranged in the center of the valve element, the left end of the elastic shaft and the valve element are integrated, the right end of the elastic shaft is a suspended circular ring end, and the suspended circular ring end can swing in an inner hole of the valve element; the servo motor is installed on the valve body, an output shaft of the servo motor is fixedly connected to the front end of an arch-shaped shaft, the middle end of the arch-shaped shaft is connected to an inner hole in the circular ring end of the right end of the elastic shaft, and the rear end of the arch-shaped shaft is connected to the valve body. The servo valve element drive switching mechanism has the advantages of a compact structure, high transmission precision, high transmission efficiency, small movement resistance of a valve core, high dynamic performance, strong adaptive capacity to environment and the like.

Description

technical field [0001] The invention relates to an electro-hydraulic servo valve, in particular to a drive structure for a valve core of the servo valve. Background technique [0002] With the rapid development of servo motor technology and electronic technology, a rotary direct drive servo valve has appeared in the field of servo valves in recent years. Advanced servo control technology realizes precise control of spool displacement. With the rapid development of my country's aerospace field, the demand for my country's electro-hydraulic servo valve control system is increasing; compared with traditional nozzle baffles or jet tube servo valves, the rotary direct-drive electro-hydraulic servo has strong anti-fouling ability and simple structure , compact layout, strong environmental adaptability (low pressure zero drift, small temperature zero drift), high frequency response and other advantages, it has broad application prospects in the fields of aerospace, aviation, and in...

AI Technical Summary

Problems solved by technology

[0004] The above two mechanisms have large dimensions and weight, high processing accuracy requirements, and uneven force on the valve core. When the valve core reciprocates at high speed, it receives a large impact, which affects the response speed of the valve core. In addition, due to the valve core and The fit gap between the small balls or pins driving the spool will be affected by the temperature of the working environment, which will affect the accuracy of the spool motion control and the service life of the parts

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