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Novel impeller of turbine flow sensor

A turbine flow and sensor technology, applied in the field of flow sensors, can solve problems such as the deterioration of instrument linearity, achieve the effects of reducing linearity errors, improving instrument performance, and increasing instrument coefficients

Inactive Publication Date: 2012-06-20
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Affected by the change of Reynolds number, the meter coefficient of the sensor will become smaller at the low flow point in the flow measurement range, thus deteriorating the linearity of the meter in the entire measuring range

Method used

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  • Novel impeller of turbine flow sensor
  • Novel impeller of turbine flow sensor
  • Novel impeller of turbine flow sensor

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The preparation method of the present invention is a conventional production preparation process,

[0022] The installation position of the novel impeller of the present invention in the turbine flow sensor is as follows: figure 1 As shown, the new type of impeller 2 is supported by the front deflector 3 and the rear deflector 4 of the turbine flow sensor, placed together in the casing 1 of the turbine flow sensor, and the positions of the deflectors 3 and 4 are positioned with positioning nails 6 , and finally the deflector and the impeller are fixed in the casing 1 with the collar 5 .

[0023] The impeller of the existing turbine flow sensor has a complete piece of blade structure, such as figure 2 , image 3 shown. An auxiliary hub 9 is arranged on the outer periphery of the impeller shaft 7, and a plurality of blades 8 are arranged along the periphery of the auxiliary hub 9, and the number of the blades 8 is determined according to actual needs.

[0024] The bl...

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Abstract

The invention discloses a novel impeller of a turbine flow sensor, which includes an impeller shaft (7), vanes (8) and an auxiliary hub (9), wherein each vane (8) is a polygonal vane formed by cutting a triangle from any position of the rectangle of the prior art from the middle area of one longitudinal and vertical edge to the upper edge of the rectangle. The novel impeller structure can obtain relatively bigger driving torque, so as to improve the meter factor of the lower-capacity point, reduce the linearity error of the meter, and improve the performance of the meter within the whole measuring range.

Description

technical field [0001] The invention relates to a flow sensor, in particular to a novel impeller of a turbine flow sensor. Background technique [0002] In a certain flow range, for a fluid medium with a certain viscosity, the rotational angular velocity of the impeller of the turbine flow sensor is proportional to the flow through the sensor. Measuring the frequency f of the pulse signal output by the turbine flow sensor can realize the measurement of the fluid flow. The turbine flow sensor has the advantages of high precision, good repeatability, wide range and small size. [0003] The blade of the impeller of the existing turbine flow sensor is a complete whole structure, that is, the width of the root of the blade is the same as that of the top. Affected by the change of Reynolds number, the meter coefficient of the sensor will become relatively small at the low flow point in the flow measurement range, thus deteriorating the linearity of the meter in the whole measuri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F15/00
Inventor 孙立军张涛杨文量张春晓
Owner TIANJIN UNIV
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