| 摘要 |
A fluid meter, such as a density meter or a Coriolis-type mass flow meter is disclosed in which the fluid tube is mounted to allow for expansion and contraction relative to a base to which opposite ends of the tube are mounted. In the preferred embodiments, a single, rectilinear flow tube measuring section is bounded at each end by a thermally insulating wall having a linear bearing which allows longitudinal axial movement while restraining transverse movement. Disposed distally of the linear bearing relative to the flow tube measuring section is means for accommodating the expansion and contraction of the measuring section. In one embodiment this is in the form of a laterally coiled tube portion. In a serial double-tube flow sensor, three serial rectilinear and parallel sections of the flow tube pass through linear bearings similar to that of the single tube, with arcuate sections joining adjacent rectilinear sections. In a third embodiment, the flow is split into two parallel tubes, one end is mounted to the base or housing by a compressible section and the other end is fixedly mounted directly to the base. The two parallel rectilinear measuring sections pass through linear bearings subsequent to the inlet flow splitter and prior to the outlet flow combiner.
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