本文選題：空氣壓縮機 + 螺桿��； 參考：《南京理工大學》2012年碩士論文

【摘要】：空氣壓縮機是一種產(chǎn)生和輸送壓縮空氣的通用機械,而螺桿壓縮機作為一種理想的壓縮機已經(jīng)引起氣體工業(yè)的更多關注。它結構簡單、成本低廉且易于維護,已廣泛應用于工業(yè)、農(nóng)業(yè)等多個領域。由于壓縮機經(jīng)常長時間連續(xù)的工作,屬于耗電量較多的用電設備,因此研究螺桿壓縮機的功率特性對于節(jié)能減耗很有意義。本文以此為背景,對螺桿壓縮機工作過程建立數(shù)學模型。以齒間容積為研究對象,求出齒間容積內(nèi)氣體的壓力、溫度等微觀特性,并以此為基礎,利用熱力學定律,求出螺桿壓縮機軸功率等宏觀特性,并對其理論消耗功率與實際消耗功率進行分析。而對于軸功率的檢測則以傅里葉變換為基礎,對采樣的信號進行加窗處理,并采用一種插值算法進行校正。系統(tǒng)主要是由電機、壓縮機、傳感器、采集卡和計算機組成。由LV25-P和LT308-S7采集電壓和電流信號,通過采集卡PCI1712轉(zhuǎn)換成標準信號送入計算機中,先通過改進的濾波算法進行濾波,然后進行加B-H窗和雙峰插值算法的FFT運算,最后通過VB界面顯示結果。為提高效率,FFT算法由C語言編寫并創(chuàng)建成動態(tài)鏈接庫由VB實現(xiàn)調(diào)用。最后得到不同情況下的功率變化曲線,并分析不同排氣壓力下的功率變化規(guī)律,所得到的結論與理論分析結果一致,運行良好可作為工業(yè)實際使用。本文所設計項目應用于蘇州某公司TRL85型螺桿空氣壓縮機的測試,系統(tǒng)具有較高的測試準確性和實時性,達到了預期的效果,未來可做進一步研究和推廣。
[Abstract]:Air compressor is a kind of universal machinery for producing and conveying compressed air, and screw compressor as an ideal compressor has attracted more attention of gas industry. It is simple in structure, low in cost and easy to maintain. It has been widely used in many fields, such as industry, agriculture and so on. Because the compressor often works continuously for a long time, it belongs to the electric equipment which consumes more electricity, so it is significant to study the power characteristic of screw compressor for saving energy and reducing consumption. Based on this background, the mathematical model of screw compressor working process is established in this paper. Taking the inter-tooth volume as the research object, the micro-characteristics of the gas pressure and temperature in the inter-tooth volume are obtained, and based on this, the macroscopic characteristics of the shaft power of the screw compressor are obtained by using the law of thermodynamics. The theoretical consumption power and the actual consumption power are analyzed. The axis power detection is based on Fourier transform, the sampled signal is windowed and corrected by an interpolation algorithm. The system is mainly composed of motor, compressor, sensor, acquisition card and computer. The voltage and current signals are collected by LV25-P and LT308-S7, and converted into standard signals by the acquisition card PCI1712. The improved filtering algorithm is used to filter the signals, and then the FFT operation with B-H window and bimodal interpolation algorithm is carried out. Finally, the results are displayed through VB interface. In order to improve the efficiency of FFT algorithm written by C language and created dynamic link library by VB. Finally, the power change curve under different conditions is obtained, and the law of power variation under different exhaust pressure is analyzed. The conclusion is consistent with the theoretical analysis result, and it can be used as industrial practice well. The design project is applied to the test of TRL85 screw air compressor in Suzhou company. The system has higher testing accuracy and real time, and achieves the expected effect, which can be further studied and popularized in the future.
【學位授予單位】：南京理工大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH45

【引證文獻】

相關碩士學位論文 前1條

1 周雷;針對XX型號平臺慣導測試系統(tǒng)的研究與實現(xiàn)[D];南京理工大學;2013年

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本文編號：2068380