Coriolis effect mass flowmeter using concentric rotors

Details Coriolis effect mass flowmeter using concentric rotors Coriolis effect mass flowmeter using concentric rotors

1996-11-18

1998-03-17

Chilcot, Richard

Measuring and testing

Volume or rate of flow

Mass flow by imparting angular or transverse momentum to the...

73861356, G01F 105, G01F 184

Patent

active

057289514

ABSTRACT:
A Coriolis flowmeter having an outer rotor positioned within a housing and having a recess coaxial with a center axis of rotation. A Coriolis rotor is positioned in the recess of the outer rotor and has a center of rotation coaxial with the center axis of rotation. The Coriolis rotor has a plurality of holes, each of which extends from the outer periphery of said Coriolis rotor to a center recess of said Coriolis rotor. The outer rotor has a plurality of holes, each of which extends from the outer periphery of the outer rotor to the recess of said outer rotor with at least some of said holes in said outer rotor being aligned with a corresponding one of said plurality of said holes in said Coriolis rotor. A fluid inlet extends fluid through holes of both the outer rotor and the Coriolis rotor to a fluid outlet of the flowmeter. Both rotors rotate about the center axis of rotation when fluid is received and passes through the holes of the rotors. Coriolis forces generated by the fluid flowing through the rotor holes and the concurrent rotation of both rotors cause the Coriolis rotor to assume an angular offset from the outer rotor about the center axis of rotation. Sensing coils and magnets generate output signals indicative of the magnitude of the angular offset of the Coriolis rotor and the mass flow rate of the flowing fluid.

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