METER WITH MAGNETIC COUPLING AND PROTECTED AGAINST ADVERSE EFFECT OF EXTERNAL MAGNETIC FIELD

摘要

This invention is related to measuring engineering and is intended for protection of meter indications, designed to measure flowing substances, in particular liquids, against inadmissible outside magnetic field effects. By flowing through a measuring chamber, the substances revolve a rotor connected to a counting mechanism via a magnetic clutch that is created by two circular coaxial magnets, separated by a non-magnetic partition. The meter uses a magnetic clutch consisting of two ring magnets with four axial direction magnetized poles. The ends of the ring magnets are covered with a magnetic circuit closing ferromagnetic rings as the magnetic clutch itself in operational environment is centrally framed, placing a flat ferromagnetic ring of ring magnets in a radial distance from the outside walls.