沥青混合料微波加热再生装置及其电磁耦合研究

发布时间：2018-07-05 10:08

本文选题：微波热再生 + 沥青混合料　；参考：《安徽工程大学》2017年硕士论文

【摘要】：微波加热效率高、成本低,是一种非常有应用前景的技术,因此它越来越广泛的被用于日常生活中和工业生产中。在修复被损坏沥青路面工作中,沥青路面微波热再生技术逐渐被发展起来。为适应路面的各种损坏形式,提高热再生的柔性,本文设计出一种柔性的微波热再生设备。该设备通过横纵向调节微波加热腔,同时调节微波加热平台的高度,用以修复不同的被损坏的沥青路面。当路面损坏面积过大时,该设备通过多个加热腔共同完成路面修复工作,因此本文仿真分析了加热腔之间的电磁波耦合对加热效果的影响。具体工作如下:(1)根据要求设计沥青混合料微波加热再生装置。沥青路面被破坏的形式多种多样,这些破坏形式往往会有不同的破坏结果。为适应不同的路面损坏形式,本文设计出柔性的微波热再生设备用以修复受损路面。该设备通过横纵向调节微波加热腔同时调节微波加热平台的高度,用以适应不同加热面积及不规则的被损坏的沥青路面。(2)优化沥青混合料微波加热再生装置。微波加热的波源来自于加热腔上的磁控管,而磁控管在工作过程中将会产生大量的热,过高的温度会将其损坏,所以设备需要良好的散热机构。针对沥青混合料微波加热再生装置的散热性能问题,本文通过对机构进行优化,获得散热性能较好的再生装置方案。(3)使用COMSOL Multiphysics进行加热仿真。通过分析计算,研究单工作腔喇叭天线电磁传输问题。使用COMSOL Multiphysics对单个加热腔进行仿真,模拟出电磁波传输状态。当微波热再生设备有多个加热腔共同协作工作时,其加热腔之间有着电磁场耦合现象,从而影响加热效果,因此本文使用COMSOL Multiphysics对两个或多个加热腔的加热过程进行仿真,得到耦合场加热的温度分布,获得沥青混合料表面以及内部的电磁场分布。通过以上的研究,得出以下结论与成果:(1)通过设计、优化得到符合设计功能要求的微波加热再生实验装置。(2)做出设备的工程图,加工出设备的零件,完成设备实体的装配,接好线路,调试设备,实现加热目的。(3)使用COMSOL Multiphysics进行加热仿真,仿真模拟出单个角锥喇叭加热腔加热的效果和沥青混合料试样温度分布情况。通过对多个角锥喇叭加热腔耦合的仿真,获得耦合加热时电磁波的传播和分布规律,以及加热完成后沥青混合料试样的温度分布规律。
[Abstract]:Microwave heating is a promising technology with high efficiency and low cost, so it is widely used in daily life and industrial production. In the process of repairing damaged asphalt pavement, microwave thermal regeneration technology of asphalt pavement has been developed gradually. In order to adapt to various damage forms of pavement and improve the flexibility of thermal regeneration, a flexible microwave thermal regeneration equipment is designed in this paper. The equipment adjusts the microwave heating cavity horizontally and longitudinally and adjusts the height of the microwave heating platform to repair different damaged asphalt pavement. When the pavement damage area is too large, the equipment completes the pavement repair work through multiple heating cavities, so the influence of electromagnetic wave coupling between the heating cavities on the heating effect is simulated and analyzed in this paper. The specific work is as follows: (1) the microwave heating regeneration device of asphalt mixture is designed according to the requirement. There are many kinds of damage forms of asphalt pavement, which often have different damage results. In order to adapt to different kinds of pavement damage, a flexible microwave thermal regeneration equipment is designed to repair the damaged pavement. The equipment adjusts the height of the microwave heating platform by adjusting the microwave heating chamber horizontally and longitudinally in order to adapt to different heating areas and irregular damaged asphalt pavement. (2) optimize the microwave heating regeneration device of asphalt mixture. The wave source of microwave heating comes from the magnetron in the heating cavity, and the magnetron will produce a lot of heat in the working process, which will be damaged by the excessive temperature, so the equipment needs a good heat dissipation mechanism. Aiming at the heat dissipation performance of asphalt mixture microwave heating regenerator, this paper optimizes the mechanism to obtain the regeneration device with better heat dissipation performance. (3) the heating simulation is carried out by COMSOL Multiphysics. Through analysis and calculation, the electromagnetic transmission problem of single working cavity horn antenna is studied. A single heating cavity is simulated by COMSOL Multiphysics to simulate the electromagnetic wave transmission state. When the microwave thermal regeneration equipment has several heating cavities working together, there is electromagnetic field coupling between the heating cavities, which affects the heating effect. Therefore, the heating process of two or more heating cavities is simulated by COMSOL Multiphysics. The temperature distribution of coupled field heating and the electromagnetic field distribution of asphalt mixture surface and interior are obtained. Through the above research, the following conclusions and achievements are obtained: (1) through the design, the microwave heating regenerating experimental device which meets the design function requirements is optimized. (2) the engineering drawings of the equipment are made, the parts of the equipment are processed, and the assembly of the equipment entity is completed. The circuit is connected and the equipment is debugged to achieve the purpose of heating. (3) using COMSOL Multiphysics to simulate the heating effect of a single corner horn heating chamber and the temperature distribution of asphalt mixture sample. The propagation and distribution of electromagnetic wave during coupled heating and the temperature distribution of asphalt mixture after heating are obtained by simulating the coupling of several angular cone horn heating cavities.
【学位授予单位】：安徽工程大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U414

【参考文献】