Digital voice coil motor control servo valve

Abstract

The invention discloses a digital voice coil motor control servo valve. The digital voice coil motor control servo valve comprises a voice coil motor, a four-way servo valve, a hall position sensor and a digital servo controller; the digital servo controller is mounted on the voice coil motor and the hall position sensor, and is respectively connected with the voice coil motor and the hall position sensor through cables; the voice coil motor directly drives the four-way servo valve, and includes a magnetic conducting pressure resistant shell, a movable ring component and an inner magnet; the hall position sensor includes a position feedback rod, an induction coil, a sensor pressure resistant pipe and a shell support frame; the four-way servo valve includes a valve body, a valve element, a valve sleeve and an end cover plate; the valve element is rigidly connected with the movable ring component and the position feedback rod; and the valve body is fixed with the magnetic conducting pressure resistant shell of the voice coil motor. The digital voice coil motor control servo valve can synchronously satisfy the performance characteristics of a proportional valve and a servo valve on performance, is strong in oil pollution resistance on structure, and can perform closed-loop control in a hydraulic loop, or can perform open-loop control.

Description

technical field [0001] The invention relates to a servo valve, in particular to a servo valve controlled by a digital voice coil motor. Background technique [0002] Proportional control valves and servo valves are commonly referred to as electronically modulated hydraulic control valves. In the electronically modulated hydraulic control valve, the proportional control valve is used in the hydraulic circuit, which mainly plays the role of continuous adjustment under open-loop control, and can also realize closed-loop control applications. However, its dynamic response is not high enough during closed-loop control adjustment; while the servo valve Although The dynamic response is high, but it can only be used in closed-loop control loops and cannot be used in open-loop control loops. In addition, the structure of the servo valve itself has poor oil pollution resistance, and its use in the general industrial hydraulic field has certain limitations. Contents of the invention ...

AI Technical Summary

Problems solved by technology

In the electronically modulated hydraulic control valve, the proportional control valve is used in the hydraulic circuit, mainly for continuous adjustment under open-loop control, and can also realize closed-loop control applications, but its dynamic response is not high enough in closed-loop control adjustment; High dynamic response, but it can only be used in closed-loop control loops and not in open-loop control loops. In addition, the structure of the servo valve itself has poor oil pollution resistance, and its use in the general industrial hydraulic field has certain limitations.

Images