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題 名 | 考慮轉速與溫差對具熱配件之高速轉軸動態特性影響=The Effects of Rotating Speed and Temperature Difference on the Dynamic Characteristics of a High Speed Shaft with Hot-fit Part |
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作 者 | 陳炘鏞; 曹晉瑜; | 書刊名 | 遠東學報 |
卷 期 | 31:3 2014.12[民103.12] |
頁 次 | 頁235-243 |
分類號 | 446.875 |
關鍵詞 | 高速主軸; 轉速; 溫差; 軸承; High speed spindle; Rotating speed; Temperature difference; Bearing; |
語 文 | 中文(Chinese) |
中文摘要 | 馬達內藏式高速主軸其特點為高轉速的切削加工,而主軸構造重點之一為將馬達轉子利用熱配的方式直接與心軸結合,成為一新的心軸-轉子系統。在先前研究中,透過接觸元素分析干涉配合(熱配)之效應並與實驗模態測試與理論公式計算驗證比較均具有相當高的精度,屬於事前設計分析。本研究延續此法,探討心軸-轉子系統處於旋轉狀態下及轉子因感應電流導致與心軸間產生溫差等因素對心軸-轉子系統動態特性的影響。藉由有限元素靜態分析加入轉速與溫差之心軸-轉子系統,求出心軸與轉子接觸面之應力/應變關係,最後再以此具預應力之效應之模型進行有限元素模態分析。由分析結果顯示:轉速與溫差對於心軸與轉子接觸面之應力與變形量有著一定的影響,且溫差的影響大於轉速的影響,但對於自然頻率的影響甚小。 |
英文摘要 | The motor built-in high speed spindle is featured in high speed cutting. One of the spindle construction keys is to directly combine a motor rotor with a shaft via hot-fit method to form a new rotor-shaft system. In previous researches, the contact element analysis is used to study the effect of the hot-fitted rotor on the dynamic stiffness of shaft. The contact analysis results are compared and verified with the theoretical formula calculation and the modal testing of prove the analysis approach is accuracy and is considered as a design priori rather than a posteriori. The research will continue the above approach to study the influence on rotor-shaft system dynamic features due to factors as rotating shaft speedand temperature difference of motor rotor by induced current. Through finite element static analysis by considering the rotating speed and temperature difference,the contact stress/strain relationship between shaft and rotor can be obtained.Finally, the finite element modal analysis with the effect of pre-stress is performed. The analysis result shows that rotation speed and temperature difference have certain influence on contact stress and deformation between shaft and rotor, among which the temperature difference influence is higher than that of rotation speed, but lower than that of natural frequency. |
本系統中英文摘要資訊取自各篇刊載內容。