| 摘要 |
In a vortex-shedding flowmeter the fluid is conducted through a pipe having a shedder (11) fixedly mounted therein. A sensor (12) is torsionally supported downstream behind the shedder (11) on a pivot axis (Y min ) normal to the flow axis. The torsional support includes a torque tube (14) whose base (14A) is received within a bore in the pipe and is welded thereto and whose tip (14B) is welded to one end of the sensor. As the incoming fluid stream flows past the shedder (11), vortices are successively detached therefrom and appear alternately on either side of the sensor (12) to develop alternating torques about pivot axis (Y min ), causing the sensor (12) to oscillate at a rate proportional to the fluid flow rate. These oscillations are converted into corresponding electrical signals by an external torque transducer (15) operatively coupled to the sensor by a sensor link assembly including a rod (18) which extends coaxially into torque tube (14) and is welded to the tip (14B) thereof. |
