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研究生:李泱叡
研究生(外文):Yang-Ruei Lee
論文名稱:應用多體動力學於具循環氣體負載之迴轉式壓縮機振動預測模型建立
論文名稱(外文):Modeling of Vibration Prediction of a Rotary Compressor with Cyclic Gas-induced Loads Based on Multi-body Dynamics
指導教授:葉維磬
指導教授(外文):Wei-Ching Yeh
學位類別:碩士
校院名稱:國立中央大學
系所名稱:機械工程學系
學門:工程學門
學類:機械工程學類
論文出版年:2018
畢業學年度:106
語文別:中文
論文頁數:79
中文關鍵詞:迴轉式壓縮機多體動力學循環氣體負載振動預測動態響應
外文關鍵詞:rotary compressormulti-body dynamicscyclic gas-induced loadsvibration predictiondynamic response
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迴轉式壓縮機因構造簡單、製造成本較低等優勢被廣泛應用於家用空調系統中。壓縮機核心壓縮件透過相互配合之偏心迴轉運動達到壓縮工作流體之功效,然而偏心機構件在高速迴轉時因慣性離心力而產生動不平衡問題,此為迴轉式壓縮機主要振動源之一,另外,壓縮腔室之週期性氣體負載變化、馬達扭矩輸出不穩定等亦為壓縮機主要振動源。本研究建立一套方法能分析預測迴轉式壓縮機之振動響應,不僅考量核心轉子系統動平衡、壓縮腔室氣體負載、馬達轉速變化,壓縮機連接機架之腳墊、吸入口與吐出口連接之銅管等邊界條件亦為本方法考量因素。透過實驗方式驗證多體動力學模型具足夠可靠度,能反應真實壓縮機之振動表現,並利用此模型作為研究平台,進行配重塊對壓縮機之振動響應分析,於配重塊設計方面得兩結論:主配重塊和頂配重塊之質量配合相較個別質量偏差,對於減振功效更具影響力,質量偏差同為0.5 g但組合不同,機殼振動量可高達4倍差異;配重塊設計應考量氣體負載,有無考量氣體負載於質量設計具28.76%機殼振動量差異,於安裝相位角設計具6.25%差異。
With its simplicity and low cost, rotary compressors are widely adopted in household air conditionings. The geometric structure of the compressor is asymmetrical to form an eccentric cam in order to conduct the compression process of the refrigerant. However, eccentric rotation cause huge dynamic unbalance, which is one of the major vibration sources of rotary compressors. Additionally, cyclic gas-induced loads in compression chamber and unstable motor torque input also are vibration sources of rotary compressors. By establishing a multi-body dynamic model considering dynamic balance of rotor system, cyclic gas-induced loads, variation of motor speed, characteristics of rubber grommet, suction tube and discharge tube to predict the vibration response of rotary compressor. Doing experiments to verify multi-body dynamic model, which is reliable then doing a series of simulations and analysis about effects of balancers on vibration reducing. There are two conclusions, the matches of main balancers and top balancers are more effective on vibration reducing than the tolerances of balancer weights. Gas-induced loads also affect the effects of balancers, therefore it is better to consider gas-induced loads when design balancers.
摘要 I
ABSTARACT II
誌謝 III
目錄 IV
圖目錄 VI
表目錄 VII
符號對照表 VIII
第1章 緒論 1
1-1 研究背景 1
1-2 文獻回顧 2
1-3 研究動機與目的 5
1-4 論文架構 6
第2章 壓縮腔室氣體負載計算方法 8
2-1 迴轉式壓縮機基本構造與作動原理 9
2-2 壓縮腔室容積與壓力計算 11
2-3 等效氣體力與力矩計算 13
第3章 迴轉式壓縮機多體動力學模型建立方法 16
3-1 多體動力學模擬軟體MSC.ADAMS介紹 16
3-2 迴轉式壓縮機之運動方程式 16
3-3 MSC.ADAMS之多體動力學求解方法介紹 20
3-4 迴轉式壓縮機CAE模型建立 22
3-5 數值量測方法說明 26
第4章 實驗驗證與模型應用分析 30
4-1 驗證實驗架設方法 30
4-2 實驗驗證CAE模型 34
4-3 考量氣體負載之配重塊設定對機殼振動響應分析 38
4-3-1 轉子系統之動不平衡問題與配重塊設計方法 38
4-3-2 配重塊質量對機殼振動響應分析 43
4-3-3 配重塊安裝相位角對機殼振動響應分析 49
4-4 本章結論 54
第5章 總結與未來展望 56
5-1 總結 56
5-2 未來展望 57
附錄A 拘束條件設定表 59
附錄B 迴轉式壓縮機零件名稱中英對照表 60
參考文獻 61
作者介紹 63
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