Impeller apparatus and turbine gas flow measurement device equipped with the same

Abstract

This invention provides a turbine wheel apparatus and the gas flow measurement apparatus with the turbine wheel apparatus, which comprises shell, front flow guide apparatus, turbine wheel, fixed cover and rack assembly. Wherein, the front flow guide apparatus comprises flow guide body and its flange; the said turbine wheel comprises turbine wheel blade, turbine wheel center and is characterized by the intensely locating with multiple blades in the shape of inverse trapezium. Comparing with current technique, it can obviously restrain the separation turbo generation and reduce the pressure loss and is of high measurement sensitivity and reduces the loss caused by the gas flow friction and turbo in the ring channel surface at the minimal degree.

Description

technical field [0001] The invention relates to a fluid measuring device, in particular to a turbine type gas flow measuring device. Background technique [0002] Turbine flowmeter is a velocity flowmeter, its main structure includes: casing, front guide device, impeller, bracket, pulse signal generator, pulse receiver and totalizer. The measured fluid in the pipeline is accelerated through the front guide device, and when passing through the impeller, the impeller rotates under the push of the airflow, and the pulse signal generator coaxial with the impeller rotates at the same time to generate pulses. Since the impeller speed is proportional to the average flow velocity of the pipeline, the pulse signal generator will also generate a pulse signal proportional to the pipeline flow velocity. The pulse signal receiver receives the pulse generated by the pulse signal generator, and through the calculator through a specific program calculation, Finall...

AI Technical Summary

Problems solved by technology

These two types have some disadvantages respectively, and the common disadvantage of both is: the destruction of the fluid flow properties in the flow field, which leads to the easy generation of separation vortex.

[0004] At the same time, the structure of the impeller, which is a sensitive component of the turbine flowmeter, affects the degree of rotation, and the degree of rotation can directly reflect the amount of fluid passing through the turbine flowmeter, so the design of the impeller directly affects the performance of the flowmeter. and measurement accuracy, in the prior art, the structural characteristics of the impeller in the turbine flowmeter cause the overlapping degree of the cascade to be small, resulting in a certain degree of leakage of the measured gas, which affects the measurement results

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