考量氣體負載下迴轉式壓縮機動態負載分析模型之建立

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姓名

呂明恆(Ming-Heng Lu) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

考量氣體負載下迴轉式壓縮機動態負載分析模型之建立
(Modeling of Dynamic Analysis of A Rotary Compressor with Considering Gas-induced Loads)

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摘要(中)

迴轉式壓縮機具有構造簡單、成本低的優勢，因此在家用空調中有很大的比例是使用迴轉式壓縮機，為了達到壓縮流體的目的，迴轉式壓縮機無法避免的是不對稱之幾何結構，若沒有偏心轉軸凸輪狀之結構，壓縮機無法壓縮氣體，因此不對稱之幾何結構成為了振動最大的主因，也成為了迴轉式壓縮機最大的缺點。若能建立一模型可以成功預測於氣體負載下迴轉式壓縮機之動態響應，可以輕易改變馬達轉速、氣體造成之負載等工作狀況，預先得知偏心轉軸之位移情形、加速度變化等，可以大幅省去壓縮機改良研發之作業時間。因此，本研究建立一組迴轉式壓縮機之多體動力學分析模型，其中不僅考量冷媒氣體在機構中造成之流體壓力，亦考量了配重塊質量與安裝之相位角對於運轉下之迴轉式壓縮機造成之影響。本文中亦對於實務上常使用之兩種工作狀況下模擬，並對於兩種工作狀況提出改良之建議配置，整理上述情況之軸承負載力、偏心轉軸之位移狀況等，並配合實驗結果作分析討論，提供製造商初步對於振動噪音改善之方針，以利改進其壓縮機之動態特性。

摘要(英)

With its simplicity and low cost, rotary compressors are widely adopted in household air conditionings. The geometric structure of the compressor is made asymmetrically to form an eccentric cam in order to conduct the compression process of the refrigerant, which becomes the major cause of its vibration and its biggest drawback. By establishing a numerical model that could predict the dynamic response of the rotary compressor under various working conditions such as different rotation speeds and gas loads, the displacement and the change of acceleration of the shaft can be obtained in advance, which will dramatically reduce the time of development of compressors. Therefore, a multi-body dynamic model was established in this research, which considers the fluid pressure induced by the refrigerant and the mass and phase angle of the counterweight to evaluate their influence on an operating rotary compressor. Optimized conditions were proposed based on the simulations conducted under two practical working conditions. Summarizing the above results including the load of bearings and the displacement of the shaft, the analysis and the experiment result can be provided to the manufacturer in order to improve the dynamic response such as vibration and noise of the compressor.

關鍵字(中)

★ 迴轉式壓縮機
★ 多體動力學
★ 循環氣體負載
★ 動態響應

關鍵字(英)

論文目次

摘要 I
ABSTRACT II
謝誌 IV
目錄 V
圖目錄 VII
表目錄 XI
符號對照表 XII
第1章緒論 1
1-1 研究背景 1
1-2 文獻回顧 3
1-3 研究動機與目的 5
1-4 論文架構 6
第2章迴轉式壓縮機轉軸所承受之氣體負載 8
2-1 迴轉式壓縮機壓縮腔體容積計算 9
2-2 壓縮腔室壓力計算 11
2-3 等效氣體力之計算 13
2-4 本章結論 14
第3章轉子系統之動平衡計算 15
3-1 轉子系統於幾何上之動平衡 15
3-2 轉子系統不平衡量之定義 17
3-3 考量氣體負載之配重塊設計 22
3-4 本章結論 25
第4章多體動力學模型之模擬分析 26
4-1 多體動力學模擬軟體MSC.ADAMS介紹 26
4-1-1 拘束條件種類簡介 26
4-1-2 求解器之介紹及選用條件 27
4-2 CAE模型建立及參數設定 28
4-2-1 轉動系統之坐標系、觀測點及配重塊相位角定義 33
第5章應用多體動力學模型模擬與實驗比對 35
5-1 狀況1：模擬工況一改良前後之比較 36
5-1-1 位移曲線之比對探討 36
5-1-2 運動軌跡之比對探討 38
5-1-3 偏心轉軸上、下標註點加速度曲線之比對探討 41
5-1-4 支座作用力之比對探討 46
5-2 狀況2：模擬工況二改良前後之比較 48
5-2-1 位移曲線之比對探討 48
5-2-2 運動軌跡之比對探討 51
5-2-3 偏心轉軸上、下標註點加速度曲線之比對探討 54
5-2-4 支座作用力之比對探討 58
5-3 實驗平台架設與介紹 60
5-4 模擬與實驗結果分析討論 64
5-4-1 工況一實驗量測結果 64
5-4-2 工況二實驗量測結果 65
5-4-3 考量邊界條件之迴轉式壓縮機模擬結果 67
5-5 本章結論 74
第6章總結與未來展望 76
6-1 總結 76
6-2 未來展望 77
參考文獻 78
作者介紹 80

參考文獻

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指導教授

吳育仁(Yu-Ren Wu)

審核日期

2017-8-21

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