Permanent magnet zero-position retaining mechanism of two-dimensional digital servo valve

Abstract

The invention relates to a permanent magnet zero-position retaining mechanism of a two-dimensional digital servo valve. The mechanism comprises an upper balance wheel, an oscillating axle and a lower balance wheel, wherein the upper balance wheel is connected with a motor shaft; the lower balance wheel is connected with a valve plug; the middle part of the upper balance wheel is provided with a mounting hole for the motor shaft to penetrate; the lower end of the upper balance wheel is provided with a groove opening; the groove opening is provided with a oscillating axle internally; one end ofthe oscillating axle extends into a limiting hole of a motor mounting plate; the upper part of the lower balance wheel can be rotatably sleeved on the oscillating axle; the lower part of the lower balance wheel is provided with a mounting hole for a valve plug to penetrate; a left retainer and a right retainer are installed on the motor mounting plate, and are positioned at the left side and the right side of the lower end of the lower balance wheel; a groove of the left retainer is provided with a first permanent magnet internally; a groove of the right retainer is provided with a second permanent magnet; grooves at the left side and the right side of the lower balance wheel are respectively provided with a third permanent magnet and a fourth permanent magnet internally; the first permanent magnet and the second permanent magnet are arranged oppositely; and the second permanent magnet and the fourth permanent magnet are arranged oppositely. The mechanism provided by the invention hasthe advantages of good safety and is reliable in working.

Description

technical field [0001] The invention relates to the field of 2D digital servo valves, in particular to a permanent magnet zero position holding mechanism of a 2D digital servo valve. 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 energy-mechanical energy 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...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem of zero spring fatigue fracture in the existing 2D digital servo valve zero holding mechanism, the present invention provides a 2D digital servo valve permanent magnet zero holding mechanism with reliable operation and good safety

Images