Measuring apparatus and method for obtaining apparent viscosity physical property of low-temperature thick liquid through combination with density measurement

Abstract

The invention discloses a measuring apparatus and method for obtaining apparent viscosity physical property of a low-temperature thick liquid through combination with density measurement. The apparatus comprises a low-temperature-thick-liquid feeding unit, a low-temperature-thick-liquid-density measuring unit, and a low-temperature-thick-liquid-viscosity measuring unit. The low-temperature-thick-liquid feeding unit is connected to the low-temperature-thick-liquid-density measuring unit and the low-temperature-thick-liquid-viscosity measuring unit in sequence through pipelines in order to enable the low-temperature thick liquid to pass through the two units. The low-temperature-thick-liquid-density measuring unit is internally provided with a density measuring electrode and an LCR measuring instrument and can measures density of the low-temperature thick liquid. The viscosity measuring unit calculates density of a stirred objective fluid through torque, of a rotating cylinder, measured by a torque transducer. The low-temperature measuring apparatus adapts to measurement of density and viscosity of a solid-liquid thick liquid or a single-phase fluid at a low temperature and is simple in process. Density measured values and viscosity measured values measured by the measuring apparatus are corresponding one to one, so that the measured results are entire. The apparatus and method can be widely applied to fields, such as air separation, spaceflight, and superconductors, with respect to deep cryogenic technology.

Description

technical field [0001] The invention belongs to the field of low-temperature measurement, and in particular relates to a measuring device and method for obtaining apparent viscosity physical properties of low-temperature slurry in combination with density measurement. Background technique [0002] Cryogenic slurry is a solid-liquid two-phase cryogenic fluid formed by suspending low-temperature solid particles in cryogenic liquid. At present, the research focus on low-temperature slurry mainly includes nitrogen slurry and hydrogen slurry. [0003] Over the past 30 years, the critical temperature of superconductors has jumped from the liquid helium (4.2K) and liquid hydrogen (20K) temperature ranges of traditional low-temperature superconductors to the liquid nitrogen (77K) temperature range, even exceeding 100K. One of the hot spots in the world. The target application fields of high-temperature superconductors mainly include superconducting cables, superconducting transfor...

AI Technical Summary

Problems solved by technology

The measurement of the density of the nitrogen slurry is the measurement of the solid phase fraction of the nitrogen slurry. The influence of the heat leakage of the low temperature system can easily cause the change of the density of the nitrogen slurry, which makes it difficult to accurately measure the apparent viscosity of the nitrogen slurry.

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