當今工業發展蓬勃，除了帶來經濟上的效益，同時也會帶來空氣污染，危害生活品質甚而傷害人體；幸而政府針對空氣污染防制制定各種污染排放物之排放標準，任何工業生產時所排放之污染物接受到嚴格的控管把關，工廠必須使用空污防制設備，減少污染物排放，既遵守法律亦負起社會責任。靜電集塵器乃為現今較成熟的空氣污染防制設備技術，其運作流程利用放電極使灰塵分子離子化後，附著於集塵板上並經由敲擊系統將灰塵擊落至收集斗槽中廢棄之；對於因燃燒不完全產生之粉塵、微粒等污染物，有良好的收集效率，並已廣泛應用於各種工業上。然而敲擊系統因疲勞破壞，嚴重影響集塵效率。
本研究著重於敲擊系統之軸承疲勞分析與設計這兩大部份；第一部份為根據專利設計圖及參數統整後使用有限元素模擬軟體進行軸承曲面接觸應力分析，再根據應力分佈數據進行各元件的疲勞壽命分析，推斷元件產生破壞的可能位置，提供業界可以提前進行補強的建議部位或避免最大應力發生的位置，期望增加整體系統的使用壽命。
第二部分為根據疲勞理論建立軸承額定負荷表，並建立一套新的軸承設計流程，讓業界在設計軸承時可以根據查表方式取代電腦模擬計算疲勞壽命，藉此來節省時間。

Industrial growth not only brings economical benefit to the society but also exgaust gas stream in the air. The polluted air might endanger the quality of life and develop a health problem for the human beings. So, to control the air pollution from the plants normally is mandated by government. In many industries, an electrostatic precipitator (ESP) is a common emission-control device that can remove dust particles from a folwing gas. Among the ESP components, the rapping system provides for removing dust from the collecting plate and the discharge electrodes. Without the proper function of the rapping system, the efficiency of the ESP will reduce or the machine might shut down in the worse scenario. The rapping system is also damaged by fatigue failure. However, the bearing is the important component in the rapping system. Therefore, there is a need to analyze the fatigue life of the bearing.
In this thesis, the finite element model is used to perform the stress analysis for the bearing. Two sets of analysis based on this developed model are conducted in the study. The first one is to understand what the component in the bearing will be fatigue failure first. The second one is to make the bearing rated capacities table. Based on these results from the analysis, the advanced technical capability for designing and maintaining the bearing of the rapping system can be provided based on this study.

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