【摘要】：在交聯(lián)聚乙烯生產(chǎn)過程中,紫外光交聯(lián)具有生產(chǎn)速度快、連續(xù)生產(chǎn)時間長和生產(chǎn)原料成本低等優(yōu)點。因此紫外光交聯(lián)得到了廣泛的關注,其中,交聯(lián)用的光源稱為研究的重中之重。目前,在紫外交聯(lián)聚乙烯生產(chǎn)技術上,廣泛使用的光源有中壓汞燈和微波無極汞燈。其中中壓汞燈光譜能量集中,但是使用壽命短;而微波汞燈的使用壽命長,卻發(fā)熱嚴重,可能導致能量的浪費�，F(xiàn)在新型的一種紫外光源為紫外反光二極管,這種光源光譜能量集中,可根據(jù)需要設計光源的排列方式,使用方便。本論文對中壓汞燈、微波汞燈和新興的LED進行了理論分析,研究了這三種典型紫外光源的發(fā)光機理等等。依靠微波能量激勵發(fā)光的無極汞燈,具有紫外輻射效率高、壽命長和熱輻射功率低等優(yōu)點,能夠避免目前光交聯(lián)系統(tǒng)中所使用的變壓器驅(qū)動的中壓汞燈輻照系統(tǒng)造成的材料交聯(lián)不均勻和局部過熱等問題,因此本文研究了微波紫外光源裝置中波導的尺寸對輸入反射系數(shù)的影響,通過仿真過程中改變波導的尺寸,得到在特定的規(guī)格下,滿足輸入端對反射系數(shù)的要求,并且通過比較波導表面電流的大小,最后確定了波導的尺寸。諧振腔上屏蔽網(wǎng)到諧振腔截面橢圓中心的距離對諧振腔能否實現(xiàn)對2.45GHz的微波的諧振有很大影響,本文通過仿真確定了這個距離,實現(xiàn)了微波2.45GHz的諧振。波導和諧振腔之間的開口,即耦合孔的位置對諧振腔內(nèi)電場的大小有很大的影響,本文通過改變波導邊緣到諧振腔邊緣的距離使得諧振腔內(nèi)的電場最大,實現(xiàn)了電場值的提高。根據(jù)諧振腔上耦合孔的尺寸對頻率為2.45GHz的微波饋入深度的影響,設計出了最優(yōu)尺寸的方形耦合孔。
[Abstract]:In the process of crosslinked polyethylene production, UV crosslinking has the advantages of fast production speed, long continuous production time and low raw material cost. Therefore, ultraviolet crosslinking has been paid much attention, among which, the light source used for crosslinking is the most important research. At present, in the production technology of UV crosslinked polyethylene, the widely used light sources are medium pressure mercury lamp and microwave non-polar mercury lamp. The spectrum energy of pressure mercury lamp is concentrated, but the service life is short, while the microwave mercury lamp has a long service life, but the heat is serious, which may lead to the waste of energy. A new type of ultraviolet light source is ultraviolet reflecting diode, which can design the arrangement of light source according to the need and is convenient to use. In this paper, the medium pressure mercury lamp, microwave mercury lamp and new LED are theoretically analyzed, and the luminescence mechanism of these three typical UV light sources are studied. The electrodeless mercury lamp, which is excited by microwave energy, has the advantages of high ultraviolet radiation efficiency, long life and low thermal radiation power, etc. It can avoid the problems of uneven crosslinking and local overheating caused by the medium pressure mercury lamp irradiating system driven by transformer in the current photocrosslinking system. In this paper, the influence of waveguide size on the input reflectance is studied. By changing the waveguide size in the simulation process, it is obtained that the reflection coefficient of the input end can be satisfied under specific specifications. Finally, the size of the waveguide is determined by comparing the surface current of the waveguide. The distance between the shielding network on the cavity and the elliptic center of the cavity section has a great influence on whether the resonator can realize the microwave resonance of 2.45GHz. This distance is determined by simulation in this paper, and the resonance of microwave 2.45GHz is realized. The opening between the waveguide and the resonator, that is, the position of the coupling hole, has a great influence on the electric field in the resonator. By changing the distance from the waveguide edge to the resonator edge, the electric field in the resonator is maximized and the electric field value is increased. According to the influence of the size of the coupling hole on the microwave feed depth of frequency 2.45GHz, the square coupling hole with the optimal size is designed.
【學位授予單位】：哈爾濱理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：O632.12

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