【摘要】：動力學(xué)分析評價及優(yōu)化是制冷設(shè)備產(chǎn)品研發(fā)中的重要工作內(nèi)容之一,關(guān)系到產(chǎn)品的振動、噪聲以及可靠性等。其中,管路系統(tǒng)的動力學(xué)設(shè)計及其優(yōu)化是一個有挑戰(zhàn)性的工作,由于管路設(shè)計方案不合理導(dǎo)致的整機異常振動噪聲以及斷管等可靠性問題較為常見。為此,本文以家用空調(diào)器為研究對象,圍繞其動力學(xué)分析評價中所涉及的管路載荷辨識以及自動布管技術(shù)等研究內(nèi)容開展工作。對空調(diào)器管路進行分析的首要條件是準(zhǔn)確的識別壓縮機時變工況下的激勵載荷。針對家用空調(diào)器轉(zhuǎn)子壓縮機時變工況下激勵載荷難以識別的問題,通過對時變工況下制冷設(shè)備轉(zhuǎn)子壓縮機排回氣管進行振動測試,獲得排回氣管口的加速度時間歷程響應(yīng)并構(gòu)成加速度期望矩陣;本文利用有限元方法構(gòu)建家用空調(diào)器轉(zhuǎn)子壓縮機的虛擬樣機模型,并使用該模型分析制冷設(shè)備轉(zhuǎn)子壓縮機在白噪聲載荷作用下排回氣管口測點的加速度響應(yīng),求出傳遞函數(shù)矩陣。由振動測試結(jié)果反算時變工況下家用空調(diào)器轉(zhuǎn)子壓縮機的載荷激勵,并利用迭代方法消除誤差,為制冷設(shè)備壓縮機-管路系統(tǒng)振動分析和管路結(jié)構(gòu)的可靠性設(shè)計及評估等提供了依據(jù),為空調(diào)管系統(tǒng)的優(yōu)化提供基礎(chǔ)。傳統(tǒng)的管路設(shè)計方法大都依賴于工程師的經(jīng)驗,具有盲目性,大大增加管路設(shè)計的成本和設(shè)計周期。本文依托現(xiàn)有的空調(diào)管路設(shè)計規(guī)范,利用Pro/TOOLKIT二次開發(fā)工具,采用參數(shù)化自動建模的方法,對壓縮機—管路系統(tǒng)自動建模的關(guān)鍵技術(shù)進行研究。論文介紹自動布管程序的整體架構(gòu),并分別對自動布管軟件的模塊功能、實現(xiàn)原理和關(guān)鍵代碼等進行說明。在空調(diào)器管路設(shè)計中應(yīng)用該技術(shù)后可以大大縮減管路設(shè)計周期,降低研發(fā)成本,提高管路設(shè)計成功率,為進一步實現(xiàn)管路動力學(xué)優(yōu)化設(shè)計,提供必要的技術(shù)支撐。
[Abstract]:Dynamic analysis, evaluation and optimization is one of the most important work in the research and development of refrigeration equipment, which is related to the vibration, noise and reliability of the product. Among them, the dynamic design and optimization of pipeline system is a challenging work. The reliability problems such as abnormal vibration and noise of the whole machine and broken pipe are common due to the unreasonable pipeline design scheme. Therefore, this paper takes the domestic air conditioner as the research object, and focuses on the identification of pipeline load and the automatic pipe arrangement technology involved in the dynamic analysis and evaluation of the air conditioner. The most important condition for analyzing the pipeline of air conditioner is to accurately identify the excitation load of compressor under time-varying working conditions. In view of the difficulty of identifying the excitation load of the rotor compressor in the time-varying condition of the domestic air conditioner, the vibration test of the exhaust pipe of the rotor compressor of the refrigeration equipment under the time-varying working condition is carried out. The acceleration time history response of the exhaust pipe outlet is obtained and the acceleration expectation matrix is formed. In this paper, a virtual prototype model of the rotor compressor of a household air conditioner is constructed by using the finite element method. The model is used to analyze the acceleration response of the measuring point at the outlet of the exhaust pipe under the white noise load of the rotor compressor of the refrigeration equipment, and the transfer function matrix is obtained. The load excitation of the rotor compressor of a household air conditioner under time-varying working conditions is inversely calculated from the vibration test results, and the error is eliminated by iterative method. It provides the basis for the vibration analysis of compressor-pipeline system of refrigeration equipment and the reliability design and evaluation of pipeline structure, and provides the basis for the optimization of air conditioning pipe system. The traditional pipe design method mostly depends on the engineer's experience and has blindness, which greatly increases the cost and design cycle of pipe design. In this paper, the key technology of automatic modeling of compressor-pipeline system is studied by using the secondary development tool of Pro/TOOLKIT and the method of parameterized automatic modeling. This paper introduces the whole structure of the automatic pipe layout program, and explains the module function, realization principle and key code of the automatic pipe arrangement software. The application of this technology in the pipeline design of air conditioner can greatly reduce the design cycle, reduce the cost of research and development, increase the success rate of pipe design, and provide necessary technical support for the further optimization design of pipeline dynamics.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TB65

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