Dynamic viscosity testing device and testing method thereof

Abstract

The invention discloses a dynamic viscosity testing device and a testing method thereof. The dynamic viscosity testing device comprises a first pressure sensor, a second pressure sensor, a measurer, a metering pump, a sample pool and a recycling pool, wherein a porous medium is arranged in the measurer, and the measurer is full of the porous medium; the measurer is a cylinder, the porous medium therein is an integrally molded cylinder and completely fits to the inner wall of the measurer, and the porous medium is detachable. The dynamic viscosity testing device is simple, high in sensitivity and simple and easy in operation, the device disclosed by the invention can measure viscosities in various ranges by replacing the porous mediums with different pore sizes in the measurer, and the device disclosed by the invention is easy to clean due to many pores and high measurement accuracy.

Description

technical field [0001] The invention relates to the technical field of fluid physical property measurement, in particular to a dynamic viscosity testing device and a testing method thereof. Background technique [0002] Viscosity is an important parameter to characterize the properties of fluids and directly reflects the characteristics of different fluids. Viscosity measurement is widely used in various social production fields. The flow of fluid is a continuous deformation process under the action of gravity or other external forces. For example, when fluid flows in a pipe, the flow velocity at the central axis of the pipe is the fastest, and the closer to the pipe wall, the slower the flow velocity. This shows that when the fluid flows The speed of each part of the interior is different. There is a speed difference between the flow layers, and the motion of the fluid is transmitted layer by layer. The transmission of this speed difference is due to the viscosity of the fl...

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Problems solved by technology

Among them, the rotation method can only test the static liquid, and cannot measure the viscosity of the flowing liquid; the falling ball method uses the combined force of the resistance of the liquid to the ball and the gravity to cause the ball to accelerate downward, but the liquid with too low viscosity has very little resistance to the ball. Small, at this time the difference between the ratio of resistance and gravity is too large, resulting in a large error in the result, and the ball falling speed is too fast, which makes the calculation very inconvenient; the vibration method is often used in the viscosity measurement of low-viscosity liquids, and most melt viscosity measurements use this method. way

The vibration method has the advantages of convenient measurement of vibration period and attenuation, less sample consumption, and convenient temperature control, but there is no recognized ideal formula for calculating viscosity; the capillary method has high measurement accuracy, but the test has high requirements for samples, and it is easy to get stuck in the test process. Capillary, and not easy to clean

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