Electromagnetic driving device and gas proportional valve with same

Abstract

The invention discloses an electromagnetic driving device. The electromagnetic driving device comprises a shell, a magnetic conduction core and a magnet assembly, wherein the shell at least comprisesa magnetic conductive portion, the magnetic conductive portion comprises a top wall portion and a side wall portion, and the top wall portion is fixedly connected with the magnetic conduction core; and the magnet assembly comprises a first permanent magnet, a second permanent magnet and a soft magnet, wherein the soft magnet is located between the first permanent magnet and the second permanent magnet, the magnet assembly is located in an electromagnetic drive device cavity, the soft magnet and the magnetic conduction core form a first interval, the first permanent magnet and the sidewall portion of the second permanent magnet form a second interval, and the first interval is less than the second interval. When the magnetic force is transmitted, the magnetic conductive portion can providea transmission effect for the magnetic force, the first permanent magnet and the second permanent magnet can be fully magnetized on the soft magnet, and meanwhile the first interval is less than the second interval, so that the magnetic force is more focused on the first interval formed by the soft magnet and the magnetic conduction core; and the electromagnetic driving device can obtain sufficient magnetic thrust to reciprocate along the axis direction of the magnetic conduction core when being powered on, so that the magnetic performance is improved, and the actuation reliability of the electromagnetic driving device can be relatively improved.

Description

technical field [0001] The invention relates to the technical fields of electromagnetic drive control and gas control, in particular to an electromagnetic drive device and a gas proportional valve using the electromagnetic drive device. Background technique [0002] The electromagnetic drive device includes a permanent magnet, a magnetic core and a coil part. The magnetic field generated by the electrification of the coil part interacts with the magnetic field generated by the permanent magnet, so that the coil part drives the valve plug close to or away from the valve port. When the magnetic force obtained by the coil part The larger it is, the more beneficial it is to accurately scale the actuation accuracy of the valve plug, and the magnetic force of the electromagnetic drive device is weak, so the movable coil part cannot obtain enough magnetic thrust for normal actuation, thus affecting the actuation of the electromagnetic drive device reliability. Contents of the inv...

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Problems solved by technology

[0002] The electromagnetic drive device includes a permanent magnet, a magnetic core and a coil part. The magnetic field generated by the electrification of the coil part interacts with the magnetic field generated by the permanent magnet, so that the coil part drives the valve plug close to or away from the valve port. When the magnetic force obtained by the coil part The larger it is, the more beneficial it is to accurately scale the actuation accuracy of the valve plug, and the magnetic force of the electromagnetic drive device is weak, so the movable coil part cannot obtain enough magnetic thrust for normal actuation, thus affecting the actuation of the electromagnetic drive device reliability

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