博碩士論文 105323026 完整後設資料紀錄

DC 欄位 語言
DC.contributor機械工程學系zh_TW
DC.creator陳仕賢zh_TW
DC.creatorShi-Xian Chenen_US
dc.date.accessioned2018-8-8T07:39:07Z
dc.date.available2018-8-8T07:39:07Z
dc.date.issued2018
dc.identifier.urihttp://ir.lib.ncu.edu.tw:88/thesis/view_etd.asp?URN=105323026
dc.contributor.department機械工程學系zh_TW
DC.description國立中央大學zh_TW
DC.descriptionNational Central Universityen_US
dc.description.abstract雙螺桿壓縮機為一種高效率、高穩定性、低噪音之流體機械,應用於冷凍空調、食品製造等多種產業,然而提升效能、改善振動情形仍為其技術發展之重要課題,本文提出一套數值分析方法,以螺桿轉子齒形離散點資料為基礎,結合熱力與流體力學計算得到之工作腔氣體壓力變動曲線,可快速計算不同齒型、不同工作條件下螺桿轉子所受之氣體衍生力及力矩、壓縮機運轉功率、軸承受力等結果,並將全載與部分負載之理論數值計算結果與CFD模擬結果比對驗證。前述計算所得螺桿轉子承受之氣體衍生變動力及力矩,後續施加於本研究所建立之雙螺桿壓縮機多體動力學(Multi-body Dynamics, MBD)分析模型,考量隨轉子接觸曲率半徑變化之赫茲接觸剛度及作用於轉子之循環氣體衍生負載對不同工作條件(100%全負載與75%、50%、25%部分負載等4種不同案例)下進行轉子接觸力、軸承受力與軸承加速度之時域及頻域分析,探討其動載響應之特徵並給予合理建議以改善其壓縮機之動態特性。zh_TW
dc.description.abstractTwin-screw compressor is a fluid machinery with high efficiency, high stability and low noise used in refrigeration, air conditioning, food manufacturing and other industries. However, improving performance and reducing vibration is still an important issue for the development of compressor manufacturing industry. This thesis proposes a set of theoretical numerical analysis method to calculate gas-induced force and torque on rotors, operating power of motor and force on the bearings under different working conditions and rotor tooth types based on discrete points of rotor tooth and the pressure curve in working chamber that is calculated by thermodynamics and fluid dynamics quickly. The results calculated by theoretical numerical analysis method are then compared and verified by CFD (computational fluid dynamics) model. Importing cyclic gas-induced force and torque on rotors into MBD (multi-body dynamics) model considering Hertz contact stiffness of rotors and gas-induced load on rotors to analyze the contact force between rotors, force on bearings and acceleration of bearings under time and frequency domain for different working conditions (100%, 75%, 50% and 25% loading conditions), and investigating the characteristic of dynamic response of Twin-screw compressor and make reasonable suggestion to improve the vibration behavior of compressor.en_US
DC.subject雙螺桿壓縮機zh_TW
DC.subject循環氣體負載zh_TW
DC.subjectCFDzh_TW
DC.subject多體動力學zh_TW
DC.subject動態響應分析zh_TW
DC.subjectTwin-screw compressoren_US
DC.subjectgas-induced loaden_US
DC.subjectCFDen_US
DC.subjectMBDen_US
DC.subjectDynamic responseen_US
DC.title不同工作條件下冷媒雙螺桿壓縮機之轉子受力分析及動載響應預測zh_TW
dc.language.isozh-TWzh-TW
DC.titleThe Study of Dynamic Response Prediction and Analysis of Cyclic Loads on Rotors for a Twin-Screw Compressor under Different Working Conditionsen_US
DC.type博碩士論文zh_TW
DC.typethesisen_US
DC.publisherNational Central Universityen_US

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