Electropneumatic field device

摘要

In an electropneumatic field device for controlling a pneumatic actuator, an energy transducer is provided which converts pneumatic energy into electrical energy. The energy transducer has a working chamber with a pneumatic compressed air inlet via which a compressed air impulse is introduced, a reset chamber, a coil, an armature separating the working chamber and the reset chamber and guided for translational back and forth movement, and a permanent magnet so that electric energy is induced in the coil. The pneumatic compressed air inlet is configured such that the compressed air impulse leaving the compressed air inlet has an inflow direction angle into the working chamber which has an axial angular direction component which is parallel to a translational axial movement direction of the armature.

主权项

1. An electropneumatic field device for controlling a pneumatic actuator, comprising:
an energy transducer which converts pneumatic energy into electrical energy; said energy transducer having a working chamber with a pneumatic compressed air inlet via which a compressed air impulse is introduced into the working chamber, a reset chamber, a coil, an armature separating the working chamber and the reset chamber and which is guided for a translational back and forth movement with corresponding enlargement or reduction in size of the working chamber or the reset chamber, and said armature comprising a permanent magnet so that electric energy is induced in the coil during the back and forth movement; the pneumatic compressed air inlet being configured in such a manner that the compressed air impulse leaving the compressed air inlet has an inflow direction angle into the working chamber which has an axial angular direction component which is parallel to a translational axial movement direction of the armature; and the compressed air inlet having a receptacle for a return body, the return body being guided in a movable manner, the receptacle forming a sealing seat in which the return body sits in a manner sealing the compressed air inlet in a hermetically closing manner when it is in a sealing position.