ELECTROMAGNETIC VALVE Russian patent published in 2000 - IPC

FIELD: hydraulic and pneumatic systems. SUBSTANCE: electromagnetic valve is designed to control liquid and gas flows. Valve has magnetic core which is essentially magnetoconducting bushing with flanges between which electromagnetic winding arranged on magnetic core bushing is positioned. Electromagnetic winding is closed by magnetoconducting casing coupled with surfaces of flanges. Magnetic core bushing is divided by diamagnetic circular super cutting off magnetic flux of bushing and positioned opposite to closing zone of magnetic flux of magnetic core bushing and armature. Armature is mounted is bushing through hole for axial displacement. It is limited from one side by stop secured in one of flanges and provided with channel for working medium outlet. Armature rests with its end on spring located in zone of working medium inlet channel from the other side. The above-indicated end has metal sealing surface contacting reciprocal metal sealing surface of bushing seat of magnetic core during operation. These metal surfaces form gate. The latter represents two pairs of simultaneously contacting sealing surfaces with microrelief in form of successively alternating circular projections and hollows on sealing surfaces of at least one pair. Valve construction provides for stable and unique position of armature on sealing surfaces of seat of magnetic core bushing. EFFECT: high tightness and reliability. 13 cl, 13 dwg