ELECTROMAGNETICALLY OPERATED SWITCH VALVE

摘要

The pole geometry of an electromagnetic switch valve includes a cylindrical well on the pole member, which is penetrated by a cylindrical pin on the magnetic armature. This obtains a magnetic force-stroke curve that first extends proportionally starting out from the initial position of the magnetic armature and then rises progressively until the magnetic armature reaches the end position. Continuously increasing the energizing of the magnetic drive upon shifting of the magnetic armature from its initial position into its end position enables the noise formation upon the closing process of the valve to be reduced. Accordingly, the noise formation upon the opening process of the valve can be reduced when the energizing of the magnetic coil is reduced not abruptly but continuously.

主权项

1. An electromagnetically operated switch valve, comprising:
a magnetic drive, comprising a magnetic coil with a central axis and a magnetic armature movable along the central axis by a stroke between an initial position and an end position, said armature forming, together with a stationary casing, a magnetic circuit and being movable from its initial position into its end position toward a pole member of the stationary casing due to electromagnetic forces upon energizing of the magnetic coil, a control for controlling the level of the energizing of the magnetic coil, and a flow opening and a sealing element for closing the flow opening, the sealing element being coupled with the magnetic armature or formed by the magnetic armature,wherein the magnetic drive possesses a magnetic force-stroke curve which altogether tends upwards starting out from the initial position of the magnetic armature up to the end position of the magnetic armature, and that the control is set up to increase or reduce or both increase and reduce the energizing of the coil during the motion of the magnetic armature between its initial position and its end position.