Multifunctional temperature-controllable liquid bridge generator

Abstract

A multifunctional temperature-controllable liquid bridge generator is composed of a support, a liquid bridge generating device, a temperature controlling device and a cooling water tank. The liquid bridge generating device comprises an upper bridge column, a lower bridge column and an observing sleeve; the upper bridge column and the lower bridge column are perpendicular to a central line and arranged on the same straight line; the upper bridge column and the lower bridge column are respectively and perpendicularly arranged in an upper bridge column installing hole formed in the upper portion of the support and a lower bridge column installing hole formed in the lower portion of the support; the upper bridge column is formed by an upper even air supplying sleeve and an upper disk which are welded, and the lower bridge column is formed by a lower disk and a lower even air supplying sleeve which are welded; the observing sleeve is coaxially arranged on and tightly attached to the outer surface of the upper even air supplying sleeve and the outer surface of the lower even air supplying sleeve in a sleeving mode; a fastening screw is arranged on the support and beside the upper bridge column installing hole. The temperature controlling device comprises a heating tank, a heating bar, a thermocouple, a temperature controller, a relay and a power supply; the heating tank is welded outside the upper even air supplying sleeve above the support, and the cooling water tank is welded outside the lower even air supplying sleeve.

Description

technical field [0001] The invention belongs to the technical field of fluid physics, in particular to a multifunctional temperature-controllable liquid bridge generator. Background technique [0002] The floating zone method is a widely used method for preparing crystal materials, and the physical model used to simulate the crystal growth process of the floating zone method is called a liquid bridge. Theoretical studies have shown that the surrounding shear airflow, temperature difference and liquid bridge volume ratio are the main factors affecting the shape of the liquid bridge interface, but the traditional liquid bridge generation device has a complex structure and single function, and cannot simultaneously realize the investigation function of these three main factors , so the research results are often one-sided, and the reliability of the obtained data is poor; in addition, the traditional liquid bridge generation device generally uses the electric heating film to di...

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Problems solved by technology

Theoretical studies have shown that the surrounding shear airflow, temperature difference and liquid bridge volume ratio are the main factors affecting the shape of the liquid bridge interface, but the traditional liquid bridge generation device has a complex structure and single function, and cannot simultaneously realize the investigation function of these three main factors , so the research results are often one-sided, and the reliability of the obtained data is poor; in addition, the traditional liquid bridge generation device generally uses the electric heating film to directly heat the liquid bridge, which is likely to cause uneven heating of the liquid bridge and unstable heating process , so that the temperature of the liquid bridge fluctuates frequently during the experiment, and the stability of the obtained data is poor; in addition, the traditional liquid bridge generating device generates temperature difference based solely on heating the upper plate of the liquid bridge without cooling the lower plate of the liquid bridge. Therefore, the temperature difference range obtained is often small

[0003] Chinese patent CN204849110U discloses a surrounding shear air flow type liquid bridge generator, which can be fed with shear air flow of different flow rates and directions, and the volume ratio of the liquid bridge can be adjusted arbitrarily, which is greatly improved compared with the traditional liquid bridge generator. However, the liquid bridge generator does not have heating and cooling functions, and is only suitable for studying the influence of shear airflow and liquid bridge volume ratio on the shape of the liquid bridge interface at room temperature, and cannot study the thermocapillary convection phenomenon caused by the temperature difference between the upper and lower plates of the liquid bridge.

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