Device for measuring flux by turbine method, the method and its uses

Abstract

The invention relates to an equipment of turbine method to test the flux and its method, the equipment includes a turbine which reflects the flow velocity by the rotating velocity and the magnetic suspend bearing which supports the turbine, the turbine through the magnetic suspend bearing and the support of the equipment connected. Of which, on the support of the equipment installs a group measure electrode, on the turbine installs a group assistant electrode. Because of the turbine rotating lead the distance between the assistant electrode and the each measured electrode to change, further lead the resistance and capacitance between the each measured electrode and the assistant electrode to change, then further lead the resistance and capacitance of the each measured electrode also to change. The measured electrode connects to the test circuit, can test the rotating angle of the turbine through testing the resistance and capacitance between the measuring electrode.

Description

technical field [0001] The invention relates to a device and a method for measuring flow by a turbine method, in particular to a device and a method for measuring flow by a turbine method in petroleum well logging and its application. Background technique [0002] In the device for measuring flow by the turbine method, the main method of measuring the flow by the turbine method widely used at present is to place a turbine in the center of the pipeline, and the two ends are supported by bearings. When the fluid passes through the pipeline, it impacts the blades of the turbine and generates a driving torque to the turbine, which makes the turbine rotate by overcoming the frictional moment and fluid resistance moment. Within a certain flow range, for a certain fluid medium viscosity, the rotational angular velocity of the turbine and the fluid flow rate into a positive correlation. Thus, the fluid flow rate can be obtained from the rotational angular velocity of the turbine, s...

AI Technical Summary

Problems solved by technology

It is easy for sand to enter between the turbine bearing and the support points at both ends, resulting in a sand card phenomenon, resulting in slow or non-rotating angular speed of the turbine, which greatly reduces the accuracy and reliability of the device

On the other hand, due to the existence of static friction, this type of flowmeter has a so-called starting displacement, which also limits the scope of use of this type of flowmeter.

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