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The Research of Environment Simulation Vacuum Vessel for Electric Products on Some Issues

Author: LiuLiNa
Tutor: ZhangShiWei
School: Northeastern University
Course: Chemical Process Equipment
Keywords: Large vacuum tank Instability ANSYS Critical pressure Polyurethane insulation
CLC: TM07
Type: Master's thesis
Year: 2008
Downloads: 18
Quote: 0
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Abstract


The electrician weather environment simulation tank analog low pressure and temperature of the Qinghai-Tibet Plateau altitude 6000m climate, to test electrical products to the transmission process of the Qinghai-Tibet Plateau situation that may arise in this environment. This requires a large low-temperature vacuum container, that involves a lot about the environment simulation can design and manufacture of some problems. In this thesis, a large (diameter of 10.5m, height 12m, about 1300m3 volume, referred to as \overall static strength analysis, the instability of the structure, polyurethane insulation built-in programs with vacuum cooling matching preliminary study, the main research contents: First, to establish a rational finite element model of the vacuum tank, using ANSYS finite element analysis software for the external pressure cylindrical shell structure static strength analysis. Under actual operating conditions of the most dangerous conditions stiffness of the structure, strength static calculation, to identify dangerous section of the structure and parts. Secondly, the structure of the 1000 legislation electrician weather environment simulation can kinetic stability analysis. Model solver ANSYS built-in environment simulation first ten natural frequency of the structure of the tank and draw a corresponding vibration mode Figure. Walled External Pressure Vessel stability theory based on the classic at home and abroad, the use of the eigenvalues ??of stability analysis and nonlinear stability analysis method requires that the structure of limit buckling load value. Then, for a thousand cubic electrician weather environment simulation tank insulating layer built-in program polyurethane foam test and verification, inspection of polyurethane foam in a vacuum environment in strength and low temperature thermal insulation properties. Insulation to meet the strength and insulation properties, then prove polyurethane foam can be placed on the inside of the tank wall, it is recommended that to consider tank materials can be used ordinary steel, so you can significantly reduce costs. Finally, for the low-temperature vacuum tank vacuum and low temperature environment to obtain a series of studies. The mathematical model of the vacuum tank vacuum and cooling at the same time, by the Pyrology basic principle of heat and mass transfer and vacuum to obtain the basic knowledge, lists the energy equations. By mathematical analysis capabilities, to solve the water ring vacuum pump vacuum chillers heat exchangers refrigeration matching problem. The research methods and conclusions of the actual analog tanks and related external pressure vessel design and structural optimization of the development and has a good reference value and a certain significance.

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CLC: > Industrial Technology > Electrotechnical > General issues > Electrical maintenance,repair
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