Zero maintaining mechanism of 2D digital servo valve

Abstract

The invention relates to a zero maintaining mechanism of a2D digital servo valve, which comprises an upper balance wheel connected with a motor shaft, a lower balance wheel connected with a valve plug, a swing shaft and a zero maintaining spring, wherein the middle of the upper balance wheel is provided with a mounting hole for the motor shaft to pass through, the upper end of the upper balance wheel is provided with a through groove in a cutting way, two half parts of the upper end of the upper balance wheel are fixedly connected, the lower end of the upper balance wheel is provided with a notch which is internally provided with the swing shaft, one end of the swing shaft extends into a limit hole of a motor mounting plate, the upper part of the lower balance wheel can be rotatably sleeved on the swing shaft, the lower part of the lower balance wheel is provided with a mounting hole for the valve plug to pass through, the lower end of the lower balance is provided with a through groove in a cutting way, two half parts of the lower end of the lower balance wheel are fixedly connected, the upper end of the zero maintaining spring is fixedly connected with the lower part of the lower balance wheel, and the lower end of the zero maintaining spring is fixedly connected with the motor mounting plate. The invention can effectively ensure zero stability when a digital electro-hydraulic servo system is initialized, and prevent false operation of an executing mechanism, caused by zero offset, from causing potential safety hazards of the masses and equipment.

Description

technical field [0001] The invention relates to the field of 2D digital servo valves, in particular to a zero-position holding mechanism for 2D digital servo valves. Background technique [0002] In recent years, the 2D digital servo valve using the principle of servo screw mechanism has been successfully applied to metal material testing machines and earthquake simulation test benches due to its characteristics of good dynamics, high precision, simple structure, low price and strong anti-pollution ability. And relevant aerospace electro-hydraulic servo systems and other important occasions. The 2D digital servo valve uses a multi-pole AC servo motor as its electrical-mechanical conversion interface. Generally speaking, in the initialization process of the electro-hydraulic servo system, the digital servo valve is first powered on (the control signal is zero at this time), and then the hydraulic pump is started to feed the hydraulic oil. When the power is turned on and the...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing 2D digital servo valve that it is difficult to ensure the stability of the zero position during the initialization, and it is easy to cause the safety hazards of the person and the equipment caused by the misoperation of the actuator, the present invention provides a method that can effectively ensure the stability of the zero position during the initialization. 2. The zero position holding mechanism of the 2D digital servo valve that avoids the potential safety hazards of the person and equipment caused by the misoperation of the actuator caused by the zero position offset

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