Torsional flow sensor

摘要

A flow sensor with h no moving parts and which is suitable for miniaturization into a probe for fluid measurements in remote, hostile environments. It comprises an isolation torque tube to isolate a high pressure media from an instrument environment. and a highly sensitive disc torque sensor to measure the values of torque generated by flow across a static impeller. A proportionalized electric property signal is transmitted to a value reading station.

主权项

1. A fluid parameter measuring device comprising:
first and second coaxial torque transfer elements, each having first and second ends, said first end of said first element secured to sensor means, said second end of said first element secured to torque generation means responsive to fluid flow, said first end of said second element secured to housing means, said second end of said second element secured to said first element between said first and second ends; said sensor means comprising first and second concentric discs separated predominately by space, said first disc having a smaller outside diameter than said second disc, said first element first end secured coaxially to said first disc at a circular interface having a diameter less than said first disc, said second disc secured about the perimeter thereof to said housing, said first and second discs linked by a pair of parallel spokes bridging said space tangentially from said interface circle perimeter on diametrically opposite sides of said interface circle; strain gage means secured to said spokes for detecting strain on said spokes induced by fluid flow over said torque generation means; and, instrument means for correlating said detected strain to a property of fluid flow over said torque generation means.