| 摘要 |
A fluid flow meter having a recessed body defining a fluid measuring chamber which is open at one end and which rotatably receives a fluid driven metering rotor. A register casing containing a fluid flow register mechanism is detachably fixed to the meter body and has a bottom wall part covering the open end of the chamber. Drive magnets and follower elements respectively disposed within the chamber and the casing on opposite sides of the casing bottom wall part transmit rotation of the rotor to actuate the register mechanism. The bottom wall part is interiorly concavely contoured so that its peripheral end portion extends essentially axially and terminates in an axially directed annular edge surface on which a structure, which mounts the register mechanism, is supportingly seated. The bottom wall part is further integrally formed with a flange extending radially from its axially extending end portion so that the wall part may be secured in place by clamping the flange between the meter body and a separately formed cover part of the casing. Concentric embossments formed integral with the bottom wall part define concentric wells opening in axially opposite directions respectively into the chamber and into the interior of the casing and respectively receiving the drive magnets and driven elements. The rotor is molded as one piece with an internal protrusion that forms a thrust bearing surface for a rotor support shaft extending into the rotor hub. A meter calibrating member selectively and transversely displaceably into an accurately diametered orifice at the inlet port for the measuring chamber provides an adjustment for meter registration.
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