| 摘要 |
<p>The invention relates to an actuator for actuating a valve installed in a hydraulic or compressed air system, comprising a coil support which can be displaced by means of air space induction in a magnetically conducting housing on a magnetic cylinder composed of a permanent magnet and a cylinder pole disk. The invention is characterised in that the dimensions of the permanent magnet ( 16 ) and the pole disk ( 17 ) correspond to each other in such a way that the diameter of the front surface of the permanent magnet ( 16 ) is at least the same size as the circumferential surface of a neighbouring pole disk ( 17 ) and that the width of the coil ( 23 ) associated with the pole disk ( 17 ) exceeds the width of the pole disk ( 17 ) by the lift amplitude of the coil support ( 19 ). According to the invention, the actuator for actuating a valve used in fluidic engineering is disposed in such a way that the coil support ( 19 ) is displaceable in a fluidic medium and the air gap ( 24 ), arranged between the coil support ( 19 ) and a magnetic cylinder pipe ( 15 ) surrounding the permanent magnet ( 16 ) and the associated pole disk ( 17 ) has a maximum width whereby a laminated lubricating film is formed without displacing the surrounding fluid.</p> |
