A kind of impeller structure of turbine flowmeter and its turbine flowmeter

Abstract

The invention provides an impeller structure of a turbine flow meter and the turbine flow meter. The impeller structure of the turbine flow meter comprises a bearing and an impeller. The impeller is arranged on the bearing, a plurality of blades are arranged on the impeller at equal intervals, and the multiple blades comprise front blade bodies and back blade bodies, wherein the front blade bodies and the back blade bodies form certain angles. According to the impeller structure of the turbine flow meter, as the protruding directions of joints of the front blade bodies and the back blade bodies are the same as the rotating direction of the impeller, the influence on physical performance viscosity of measured fluid is small, the impeller structure can be used under the high-viscosity condition accordingly, and the measurement range of the turbine flow meter is expanded. Under the effect of axial medium force, the rotating torque generated by the impeller structure is small, the rotating speed of the impeller is low when the flow speeds are same, generated flow-speed distortion and rotating flow caused by the impeller are also small, and the length of an upstream straight pipe section and the length of a downstream straight pipe section required during installing are smaller accordingly; unbalanced centrifugal force of rotating is small, the frictional resistance is low, and therefore the service life of the bearing of the flow meter is prolonged.

Description

technical field [0001] The invention relates to the technical field of flowmeters, in particular to an impeller structure of a turbine flowmeter and the turbine flowmeter thereof. Background technique [0002] Turbine flow meters are velocity instruments such as figure 1 , figure 2 As shown, when the medium enters the flow meter, under the action of the fluid, because the turbine blade A forms a certain angle with the fluid flow direction, the turbine generates a rotating torque at this time, and starts to rotate after the turbine overcomes the resistance torque and friction torque. When the torque reaches When balanced, the rotational speed is stable, the rotational angular velocity of the turbine is linearly related to the flow rate, and the magnet on the rotating signal wheel 5 periodically changes the reluctance of the sensor, so that the signal detection probe 6 induces a pulse signal proportional to the fluid volume flow rate. After the signal is amplified and shape...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide an impeller structure of a turbine flowmeter and the turbine flowmeter thereof, so as to solve the problem that the scope of use of the turbine flowmeter in the prior art is limited

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