| 摘要 |
The liquid meter has a housing (2) with two separated sealed compartments (4,5) and a turbine (6) placed in the displacement axis of a pipe (3) through which the liquid to be measured flows. The meter has a totalisator (7) which via a gear train (10) actuates an indicator (11) consisting of a number of numbered rings (12). The transmission of movement from the turbine to the totalisator is done through a wall separating the compartments by a magnetic drive which has a pair of magnets (8,9) having at least a double polarity face. The first magnet (8) is associated with the turbine (6), or magnet driver, which is in magnetic equilibrium with the second magnet (9) associated with the totalisator (7), or driving magnet. Each magnet (8,9) has at least a double polarity face on each of its other faces (8',8";9',9"). The magnets have a square shape and are made from ferrite or a rare earth.
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