| 摘要 |
<p>A pressure transmitter (10) has a pressure transducer (12) in a transmitter housing (14). The transmitter housing (14) includes a groove or a notch (20) defining a flexure closely proximate a housing outer rim (24). The outer rim (24) receives a large clamping force from a flange (16) and is deflectable about the flexure for reducing transmission of axial and radial components of the clamping force from the housing outer rim (24) to the transducer (12), which forces can cause distortions to the pressure transducer (12). Unevenly distributed clamping forces caused by differential thermal expansion of the flange (16), bolts (26) and housing (14), are isolated from the transducer (12), thereby reducing measurement errors. Further, transmission of hysteretic radial forces from the transmitter housing (14) to the transducer (12) caused by friction when the flange (16) slides across the pressure transmitter housing (14), each having different thermal coefficients of expansion, is also reduced. Several types of pressure transducers (12) including capacitive cell transducers can be in the transmitter housing (14) for providing a pressure output indicative of line and differential pressure.</p> |
