Direct-acting bidirectional proportion electromagnet

Abstract

A direct-acting bidirectional proportion electromagnet comprises a magnetism isolating ring, a first guide sleeve, a second guide sleeve, an armature, a push rod, a control coil and a coil retainer, wherein a groove is formed in the circumferential direction of the coil retainer which is used for winding the control coil to form a current excitation source; cylindrical pole shoes of the first guide sleeve and the second guide sleeve are opposite to a cylinder outside the armature and are an airgap away from each other to form a left pole shoe pair and a right pole shoe pair, of which the airgaps are equal; the magnet poles of the same nature of a first permanent magnet and a second permanent magnet are respectively attracted by the left end and the right end of the armature; the other magnet pole of the first permanent magnet attracts a first magnetic-conductive part, and the other magnet pole of the second permanent magnet attracts a second magnetic-conductive part; the two poles of the first and second permanent magnets, together with the first guide sleeve and the second guide sleeve, form a first permanent magnet field and a second permanent magnet field respectively through the first magnetic-conductive part or the second permanent magnet; the armature push rod is connected with the armature; the first guide sleeve and the second guide sleeve are respectively at two sides of the magnetism isolating ring and are connected with the magnetism isolating ring.

Description

technical field [0001] The invention belongs to an electric-mechanical conversion mechanism for an electric (pneumatic)-hydraulic servo / proportional valve in the field of fluid transmission and control, and in particular relates to a direct-acting bidirectional proportional electromagnet. Background technique [0002] As an important core component in electro-hydraulic servo / proportional valves, electro-mechanical converters play an important role in electro-hydraulic control systems in national defense and civil industries such as aerospace, military, machine tools, mining, metallurgy and engineering machinery. Its performance is related to the performance of the entire electro-hydraulic servo / proportional valve. [0003] In the existing servo / proportional valves, a large number of moving iron electro-mechanical converters, that is, proportional electromagnets, are used as electro-mechanical converters. The proportional characteristic of the proportional electromagnet is th...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of traditional proportional electromagnets that require two coils for two-way drive and large volume, the requirements for spring design are high, the zero position is unstable, the electromagnet with proportional characteristics is obtained by using a magnetic isolation ring, and the processing technology is complicated. The invention provides a proportional electromagnet driven by a single-phase coil bidirectionally

Images