![]() The supports also house the bearings, allowing for the measured media to lubricate the bushes (Sealed grease bearings are often used for gas) – prolonging the flow meters life span. The rotor is supported by a shaft that rests on internally mounted struts or supports. The Supports in Turbine Flow Meters are designed to also act as flow straighteners, stabilizing the flow and minimizing the negative effects of turbulence and swirl. It consists of a flow tube with end connections and a magnetic multi bladed free spinning rotor/impeller mounted inside, in line with the flow. The Turbine flow meter (axial flow turbine) was invented by Reinhard Woltman in 1790 and is an accurate and reliable flow meter for many liquids and gases. The rotor (or dual rotors) is the only moving part of the flow meter.įigure 1: Typical Turbine Flow Meter Construction The frequency of the signal relates directly to flow rate. The summation of the pulsing electrical signal is related directly to total flow, based on the calibration data created for that specific flow turbine. The angular velocity of the spinning rotor results in the generation of an electrical signal (AC sine wave type typically) in the pickup which is located on the body of the flow turbine but is not usually wetted. The flowing fluid/gas engages the turbines' rotor causing it to rotate at an angular velocity proportional to the fluid flow rate. The Principle is well proven and the application suitability list is very large. The rotations are measured and calculated to provide a proportional measurement relative to flow rate. Turbine meters measure flow using the mechanical energy of the fluid or gas to rotate a turbine rotor within the flow stream inside the meter.
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