本文關(guān)鍵詞： 螺桿壓縮機 永磁同步電動機 轉(zhuǎn)子結(jié)構(gòu) 機械強度分析 固有特性分析　出處：《沈陽工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：螺桿壓縮機作為新一代壓縮機，廣泛應(yīng)用于礦山、化工、能源等工業(yè)部門，逐漸取代了其他類型的壓縮機。此外，螺桿壓縮機消耗了太多的能源，是許多企業(yè)中的用電大戶。因此，降低壓縮機的能源消耗實現(xiàn)高效節(jié)能成為許多科研院所以及企業(yè)當(dāng)前亟需解決的重大課題。目前，許多企業(yè)均選擇變頻電機替代常規(guī)電機來驅(qū)動壓縮機并取得了一定成效�，F(xiàn)在大多數(shù)的變頻螺桿壓縮機均由異步電動機驅(qū)動，然而異步電動機效率低、變頻控制比較復(fù)雜。相比較之下，永磁同步電機具有溫升低、力能指標(biāo)高、良好的起動性能、輕載負(fù)荷效率高等優(yōu)點，是未來螺桿壓縮機的發(fā)展趨勢。本文簡要介紹了壓縮機用電機的發(fā)展，并針對額定功率45kW，轉(zhuǎn)速4000r/min的螺桿壓縮機用永磁同步電動機展開研究。 首先，針對螺桿壓縮機用永磁同步電動機的實際運行情況，調(diào)試了8極48槽、6極36槽和4極24槽三種不同極槽配合永磁同步電機電磁設(shè)計方案。通過比較分析其性能，確定了永磁同步電動機的極數(shù)。 其次，進(jìn)一步對選定極數(shù)的永磁同步電動機方案的性能進(jìn)行分析研究。對采用不同極槽配合、轉(zhuǎn)子磁路結(jié)構(gòu)、氣隙長度以及定子內(nèi)徑參數(shù)的永磁同步電動機進(jìn)行對比分析，以確定螺桿壓縮機用永磁同步電動機轉(zhuǎn)子內(nèi)部結(jié)構(gòu)的各項參數(shù)。 再次，，利用ANSYS有限元軟件對永磁同步電動機的轉(zhuǎn)子結(jié)構(gòu)進(jìn)行機械強度分析，通過對轉(zhuǎn)子受力情況的計算結(jié)果對比，分析影響轉(zhuǎn)子結(jié)構(gòu)機械強度的關(guān)鍵因素。根據(jù)轉(zhuǎn)子結(jié)構(gòu)應(yīng)力分布的計算結(jié)果對其進(jìn)行優(yōu)選，從結(jié)構(gòu)上保證電動機安全可靠。 最后，利用Solidworks和ANSYS軟件，建立了整體的螺桿壓縮機轉(zhuǎn)子動態(tài)分析模型。通過對上述模型動態(tài)特性的分析，得出螺桿轉(zhuǎn)子以及系統(tǒng)整體的固有頻率和振型。
[Abstract]:Screw compressor as a new generation of compressors, widely used in mining, chemical, energy and other industries, gradually replacing other types of compressors. In addition, screw compressors consume too much energy. Therefore, reducing the energy consumption of compressors to achieve high efficiency and energy saving has become a major issue that many scientific research institutes and enterprises urgently need to solve. Many enterprises choose frequency conversion motor instead of conventional motor to drive compressor and have achieved certain results. Now most of the variable frequency screw compressor are driven by asynchronous motor but the efficiency of asynchronous motor is low. Frequency conversion control is more complex. Compared with PMSM, PMSM has the advantages of low temperature rise, high force and energy index, good starting performance, high efficiency of light load and so on. It is the development trend of screw compressor in the future. This paper briefly introduces the development of compressor motor and aims at the rated power of 45kW. The permanent magnet synchronous motor (PMSM) for screw compressor with rotational speed of 4000r / min is studied. First of all, according to the actual operation of permanent magnet synchronous motor for screw compressor, 8 pole 48 slots are debugged. The electromagnetic design scheme of permanent magnet synchronous motor with 6 pole 36 slot and 4 pole 24 slot is introduced. The pole number of permanent magnet synchronous motor is determined by comparing and analyzing its performance. Secondly, the performance of permanent magnet synchronous motor (PMSM) with selected poles is analyzed and studied. The air gap length and stator inner diameter parameters of permanent magnet synchronous motor (PMSM) are compared and analyzed in order to determine the internal structure parameters of PMSM rotor for screw compressor. Thirdly, the rotor structure of permanent magnet synchronous motor (PMSM) is analyzed by ANSYS finite element software, and the results of calculation are compared. The key factors affecting the mechanical strength of the rotor structure are analyzed. According to the calculation results of the stress distribution of the rotor structure, the optimum selection is carried out to ensure the safety and reliability of the motor structurally. Finally, the dynamic analysis model of screw compressor rotor is established by using Solidworks and ANSYS software, and the dynamic characteristics of the model are analyzed. The natural frequencies and modes of the screw rotor and the whole system are obtained.
【學(xué)位授予單位】：沈陽工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM351

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