| 摘要 |
FIELD: electricity.SUBSTANCE: invention refers to electrical engineering and electromagnetic valves. Magnetic plate positioned around moving iron core to form magnetic conductor between magnetic frame and moving iron core includes a section protruding towards immobile iron core along the surface of moving iron core. Area Sa of external surface section of moving iron core opposite to internal surface of the magnetic plate, and area Sb of moving iron core cross-section are set as K=Sa/Sb, K>1. Axial length h of internal surface of the magnetic plate and length L from attracting surface of moving iron core separated from immobile iron core by pullback spring to the front end of the magnetic plate complies with the condition of 2?K? (K value when h=L).EFFECT: enhanced efficiency due to reduced magnetic resistance generated by space between moving iron core and magnetic plate.3 cl, 5 dwg |
