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Device and method for rapidly measuring viscosity of high-temperature melt by using free vibration method of spring oscillator

A rapid measurement, spring oscillator technology, applied in the field of metallurgy and casting, can solve the problem of real-time detection limitation of test methods, and achieve the effect of sufficient and reliable mathematical basis, easy acquisition and processing, and good stability

Inactive Publication Date: 2014-12-03
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the test device designed by basic methods such as the capillary method, torsional vibration method, falling ball method and rotation method needs to collect small physical quantities such as the natural flow time of the liquid or the torsion angle of the hanging wire, the falling time of the ball and the speed change, the test equipment is required to be very precise. The application has very strict requirements on the working environment, especially for high-temperature melt viscosity detection. Under the special conditions of high-temperature working environment, many test methods are limited to a certain extent in the real-time detection of industrial production sites.

Method used

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  • Device and method for rapidly measuring viscosity of high-temperature melt by using free vibration method of spring oscillator
  • Device and method for rapidly measuring viscosity of high-temperature melt by using free vibration method of spring oscillator
  • Device and method for rapidly measuring viscosity of high-temperature melt by using free vibration method of spring oscillator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The device for quickly measuring the viscosity of high-temperature melts by the free vibration method of a spring vibrator consists of: a vane vibrator 1, the vane vibrator 1 is connected to one end of the connecting rod 2, and the spring 3 is inserted into the connecting rod 2 to connect as a whole. The other end of the connecting rod 2 is connected to the permanent magnet 4, the outer ring of the permanent magnet is covered with a coil 5, the size of the coil is greater than the outer ring size of the permanent magnet, and the coil 5 is connected to the signal amplification processor 6. The signal amplifying processor 6 is connected to a computer 7, and the vane vibrator 1 extends into the crucible 8.

[0019] The device for rapidly measuring the viscosity of high-temperature melts by the spring oscillator free vibration method, the measured melt 9 is installed in the crucible 8, and the crucible 8 is placed on the platform 10 directly below the blade oscillator 1, and...

Embodiment 2

[0021] The device and method for quickly measuring the viscosity of a high-temperature melt by the spring vibrator free vibration method described in Example 1, hangs a blade vibrator with a mass m on a vertically suspended spring to form a spring vibrator, and the vibrator vibrates vertically in the liquid When , due to the velocity gradient between different liquid layers, when one liquid layer moves relative to another liquid layer, there will be internal friction force tangential to the surface of the liquid layer. When the shape of the vibrator is fixed and the vibration does not cause turbulence or the turbulence is very small, the internal friction force on the vibrator is proportional to the velocity gradient.

[0022] Let f be the internal friction force on the vibrator, s be the total area of ​​friction between the vibrator and the liquid layer, is the velocity gradient between liquid layers, and η is the dynamic viscosity value of the liquid. According to the relev...

Embodiment 3

[0068] The method for quickly measuring the viscosity of high-temperature melts by the free vibration method of the spring vibrator,

[0069] The calibration of the system constants:

[0070] The parameters of the system should be calibrated before each use; a standard liquid produced by the National Metrology Institute is used as the standard liquid to calibrate the parameters of the system; the software program of the system is set to the parameter calibration state, and the program requires the input of the m value k value of the system and the viscosity parameters of the standard liquid, follow the program prompts,

[0071] (1) Place the crucible containing the liquid to be tested directly below the weak spring vibrator;

[0072] (2) Rotate the compass of the lifting mechanism so that the spring vibrator slowly descends and immerses into the center of the liquid to be tested;

[0073] (3) Start the computer signal acquisition system to make it in the signal acquisition s...

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Abstract

The invention relates to a method for rapidly measuring the viscosity of a high-temperature melt by using a free vibration method of a spring oscillator. In a casting process, the structure of liquid metal has important influence on the structure and the performance of a solidified metal because of the genetic effects of the metal. The device for rapidly measuring the viscosity of the high-temperature melt by using the free vibration method of the spring oscillator comprises a blade oscillator (1) which is connected with one end of a connecting rod (2), a spring (3) is sleeved on the connecting rod (2) to be connected into a whole, the other end of the connecting rod (2) is connected with a permanent magnet (4), a coil (5) is sleeved on the outer ring of the permanent magnet, is in a size larger than the outer ring size of the permanent magnet and is connected with a signal amplification processor (6) which is connected with a computer (7), and the blade oscillator extends into a crucible (8). The invention is used for measuring the viscosity of the high-temperature melt.

Description

Technical field: [0001] The invention relates to the field of metallurgy and casting, in particular to a device and method for quickly measuring the viscosity of high-temperature melt by a free vibration method of a spring vibrator. Background technique: [0002] Studies have shown that viscosity is an important macroscopic manifestation of the microstructure of the melt. During the casting process, due to the genetic effect of the metal, the structure of the liquid metal has an important impact on its solidified structure and performance. In addition, the viscosity of liquid metal also marks its fluidity, which not only affects the filling process, but also an important factor affecting the floating of small bubbles and non-metallic inclusions in the melt. Therefore, the measurement of viscosity has very important practical significance for the scientific research and casting production of metal materials. [0003] High temperature melt viscosity detection is developed on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N11/16
Inventor 李大勇张建雷王利华孙谦
Owner HARBIN UNIV OF SCI & TECH
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