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Method for measuring viscosity of dynamic fluid by using bending vibration

A technology of bending vibration and fluid viscosity, applied in measurement devices, flow characteristics, instruments, etc., can solve the problem that real-time online measurement cannot be realized, and achieve the effect of real-time online measurement

Active Publication Date: 2011-08-17
XIAN DONGFENG MACHINERY & ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, because this is a static fluid viscosity measurement method, and the fluid in industrial production is often flowing, it is a dynamic measurement, so this method cannot realize the industrial real-time online measurement function

Method used

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  • Method for measuring viscosity of dynamic fluid by using bending vibration
  • Method for measuring viscosity of dynamic fluid by using bending vibration
  • Method for measuring viscosity of dynamic fluid by using bending vibration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] ① Continuously inject air into the vibrating tube and fill it with air. The controller controls the vibrating tube to perform constant-amplitude bending vibration with an amplitude A. Measure the output power P of the controller when the vibrating tube vibrates. 0 and the resonant frequency f of the vibrating tube 0 ;

[0029] ② Continuously inject the known dynamic viscosity η into the vibrating tube 1 The fluid inside the vibrating tube is filled with the fluid, and the inlet and outlet of the vibrating tube are respectively equipped with a solenoid valve. Close the solenoid valve so that the fluid in the tube does not have an axial flow velocity along the direction of the pipeline. Bending vibration with constant amplitude, measure the output power P of the controller 1 and the resonant frequency f of the vibrating tube 1 ;

[0030] ③Calculation of fluid viscosity factor K s ;

[0031] K s = η...

Embodiment 2

[0039] ① Continuously inject air into the vibrating tube and fill it with air, the controller controls the vibrating tube to perform constant amplitude bending vibration with amplitude B, and measure the output power P of the controller when the vibrating tube vibrates 0 and the resonant frequency f of the vibrating tube 0 ;

[0040] ② Continuously inject the known dynamic viscosity η into the vibrating tube 1 The fluid inside is filled with the fluid, the inlet and outlet of the vibrating tube are respectively provided with a solenoid valve, the solenoid valve is closed so that the fluid in the tube does not have an axial flow velocity along the direction of the pipeline, and the controller controls the vibrating tube to proceed with the vibration amplitude B Bending vibration with constant amplitude, measure the output power P of the controller 1 and the resonant frequency f of the vibrating tube 1 ;

[0041] ③Calculation of fluid viscosity factor K s ;

[0042] ...

Embodiment 3

[0050] ① Continuously inject air into the vibrating tube and fill it with air, the controller controls the vibrating tube to perform constant amplitude bending vibration with amplitude C, and measure the output power P of the controller when the vibrating tube vibrates 0 and the resonant frequency f of the vibrating tube0 ;

[0051] ② Continuously inject the known dynamic viscosity η into the vibrating tube 1 The fluid in the tube is filled with the fluid, the inlet and outlet of the vibrating tube are respectively provided with a solenoid valve, the solenoid valve is closed, so that the fluid in the tube does not have an axial flow velocity along the direction of the tube, and the controller controls the vibrating tube to proceed with the vibration amplitude C Bending vibration with constant amplitude, measure the output power P of the controller 1 and the resonant frequency f of the vibrating tube 1 ;

[0052] ③Calculation of fluid viscosity factor K s ;

[0053] ...

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Abstract

The invention relates to a method for measuring viscosity, in particular to a method for measuring the viscosity of dynamic fluid by using a vibration pipe, a controller, a flow rate detecting device and a calculating device, wherein the vibration pipe is communicated with a fluid flow pipeline, the controller is used for controlling the vibration of the vibration pipe, and the flow rate detecting device and the calculating device are respectively arranged on two ends of the vibration pipe. Because a Coriolis mass flowmeter can be used for directly measuring the mass flow rate of the fluid, the dynamic viscosity measurement result with the flow rate compensated can be calculated conveniently, and further the viscosity of the fluid can be measured on line in real time. Because the Coriolismass flowmeter can be used for measuring the density of the fluid in the pipe, the real-time kinematic viscosity of the fluid in the pipe can be obtained.

Description

【Technical field】 [0001] The invention relates to a method for detecting viscosity, in particular to a method for detecting dynamic fluid viscosity. 【Background technique】 [0002] Viscosity and its measurement are widely used in many fields of national economy, such as petroleum, chemical industry, transportation, national defense, light industry, food, building materials, coal, metallurgy, aerospace, medicine and other fields. Viscosity measurement is an important means to control the production process, ensure safe production, control and evaluate product quality, medical diagnosis and scientific research. [0003] Viscometers commonly used in the production process include capillary viscometers, rotational viscometers and vibratory viscometers. [0004] The capillary viscometer uses Hagen-Poiseuille's law to calculate the viscosity of the fluid by recording the falling time of the fluid in the capillary. Its disadvantage is that it is difficult to achieve real-time on-l...

Claims

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Application Information

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IPC IPC(8): G01N11/00
Inventor 任建新张忠洋刘景峰张鹏高百顺
Owner XIAN DONGFENG MACHINERY & ELECTRONICS
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