發(fā)布時間：2018-05-08 09:46

  本文選題：螺桿真空泵 + 轉(zhuǎn)子型線��； 參考：《浙江理工大學(xué)》2016年博士論文

【摘要】：干式螺桿真空泵是一種真空獲得設(shè)備。近年來,真空泵的發(fā)展愈來愈受到應(yīng)用場合的限制,傳統(tǒng)的真空系統(tǒng)無法滿足清潔無油及耐腐蝕的要求,逐漸被無油清潔的真空獲得系統(tǒng)所代替,干式螺桿真空泵就屬于這類無油、干式運行的真空泵,其中內(nèi)壓縮螺桿真空泵可以大幅降低驅(qū)動能源,隨著我國對節(jié)能環(huán)保要求的提升,能夠?qū)崿F(xiàn)干式運行和節(jié)能的內(nèi)壓縮干式螺桿真空泵已成為發(fā)展趨勢。螺桿真空泵屬于非接觸型干式泵,核心元件是一對帶嚙合間隙的螺桿轉(zhuǎn)子,成對螺桿性能直接影響整臺螺桿真空泵的工作性能和競爭力,目前缺乏螺桿齒形設(shè)計方法和可靠的真空泵工作特性計算方法,因此對成對螺桿結(jié)構(gòu)、真空泵的工作特性進行理論和試驗研究,為干式螺桿真空泵的研發(fā)提供理論基礎(chǔ)和設(shè)計依據(jù),具有重要的實用價值和理論意義。本論文首先在積極借鑒、吸收相關(guān)理論和研究成果的基礎(chǔ)上,展開了螺桿真空泵螺桿齒形和工作特性的研究,提出了密封型螺桿轉(zhuǎn)子端面型線設(shè)計方法、三段式漸變和自平衡內(nèi)壓縮螺桿轉(zhuǎn)子齒形的設(shè)計方法;然后,進行了螺桿真空泵的通道模型研究,遵循質(zhì)量守恒定律,提出了基于孔徑流量系數(shù)法的螺桿真空泵的工作特性計算方法,并展開了螺桿真空泵工作特性仿真與試驗方法研究;最后,結(jié)合螺桿真空泵的仿真與試驗結(jié)果,設(shè)計與開發(fā)了少級數(shù)內(nèi)壓縮螺桿真空泵。論文主要的研究內(nèi)容和結(jié)果如下:第一章,闡述了論文的研究背景、目的和意義;綜述了干式螺桿真空泵螺桿轉(zhuǎn)子齒形、真空泵工作特性國內(nèi)外研究現(xiàn)狀、存在的問題和發(fā)展趨勢,提出了論文的研究思路和主要研究內(nèi)容。第二章,分析了現(xiàn)有最常用的四種螺桿端面型線,揭示了其密封特性及優(yōu)缺點;建立了螺桿轉(zhuǎn)子共軛端面型線的設(shè)計方法,可針對任意曲線構(gòu)成的雙螺桿轉(zhuǎn)子型線進行設(shè)計,對現(xiàn)有型線不足展開分析與改進;根據(jù)螺桿端面型線設(shè)計準(zhǔn)則,建立了嚴(yán)格密封型螺桿型線,為建立成對螺桿嚙合模型以及內(nèi)壓縮螺桿奠定基礎(chǔ)。第三章,揭示了現(xiàn)有各類內(nèi)部壓縮螺桿真空泵工作特性;提出了三段式平滑過渡的內(nèi)壓縮螺桿轉(zhuǎn)子設(shè)計方法,設(shè)計了一種少級數(shù)、三段式內(nèi)部壓縮體積漸進式變化的螺桿轉(zhuǎn)子;構(gòu)建了一種自平衡的內(nèi)部壓縮螺桿轉(zhuǎn)子模型,建立了自平衡螺桿轉(zhuǎn)子優(yōu)化設(shè)計模型;為螺桿真空泵通道類型比較分析和少級數(shù)內(nèi)壓縮螺桿真空泵研究奠定基礎(chǔ)。第四章,基于基本假設(shè)和質(zhì)量守恒定律,提出了等熵流動的孔徑流量系數(shù)法計算質(zhì)量流,建立了螺桿真空泵通道質(zhì)量流計算模型;構(gòu)建了螺桿真空泵通道模型,建立了工作型腔室的連接拓撲關(guān)系,提出了四種通道間隙最小縫隙面積計算方法;構(gòu)建了離散化、多級螺桿真空泵密封型漩渦模型,建立了穩(wěn)定狀態(tài)下,多級螺桿真空泵工作特性計算模型。第五章,依據(jù)螺桿真空泵工作特性計算模型,計算了不同壓力下的抽氣速率和對應(yīng)消耗的功率;依據(jù)測試標(biāo)準(zhǔn),制定了螺桿真空泵工作特性測試方案,并根據(jù)測試方案測試了真空泵的工作特性;比較發(fā)現(xiàn)仿真值與工程值比較吻合,達到預(yù)期效果。第六章,針對影響工作特性的因素,設(shè)計與開發(fā)了三段漸變式和自平衡螺桿內(nèi)壓縮真空泵,分別仿真和測試并繪制了兩種螺桿真空泵的抽速、消耗功率與入口壓力的曲線。兩種泵抽氣效率達85%以上,在10000Pa以下工作壓力,與等抽速等螺距螺桿真空泵相比能效節(jié)省達40%以上,其中三段漸變式螺桿真空泵在全壓力范圍內(nèi),能效節(jié)省33%以上。第七章,總結(jié)了全文的研究工作,提出了進一步研究工作的內(nèi)容。
[Abstract]:Dry screw vacuum pump is a kind of vacuum acquisition equipment. In recent years, the development of vacuum pump has been more and more restricted by the application situation. The traditional vacuum system can not meet the requirements of clean and non oil and corrosion resistance. It is gradually replaced by the vacuum obtaining system without oil cleaning. The dry type vacuum pump belongs to this kind of oil free and dry operation vacuum. With the internal compression screw vacuum pump, the internal compression screw vacuum pump can greatly reduce the driving energy. With the promotion of energy saving and environmental protection in China, the dry type internal compression dry screw vacuum pump has become the development trend. The screw vacuum pump belongs to the non-contact dry type pump, the core element is a pair of screw rotors with meshing clearance. The screw performance directly affects the performance and competitiveness of the whole screw vacuum pump. At present, there is a lack of screw tooth shape design method and a reliable calculation method of the working characteristics of vacuum pump. Therefore, the working characteristics of the pair screw structure and vacuum pump are studied theoretically and experimentally, which provide the theoretical basis and design basis for the development of the dry screw vacuum pump. According to it, it has important practical value and theoretical significance. In this paper, the tooth shape and working characteristics of screw vacuum pump are studied on the basis of relevant theories and research achievements, and the design method of the end face line of the sealed screw rotor is put forward, and the three segment type gradient and self balance internal compression of the screw rotor have been put forward. Then, the passage model of the screw vacuum pump is studied and the law of mass conservation is followed. The calculation method of the working characteristics of the screw vacuum pump based on the pore size flow coefficient method is put forward, and the simulation and test method of the working characteristics of the screw vacuum pump are carried out, and the simulation and test results of the screw vacuum pump are designed and the design is designed. The main contents and results of this paper are as follows: in Chapter 1, the research background, purpose and significance of the paper are expounded, the research status of the screw rotor tooth shape of the dry screw vacuum pump, the current research status of the vacuum pump working characteristics at home and abroad, the existing problems and the development trend are discussed, and the research ideas of the paper are put forward. And the main research contents. In the second chapter, the most commonly used four kinds of screw end face lines are analyzed, and their sealing characteristics and advantages and disadvantages are revealed. The design method of the conjugate end profile of the screw rotor is established, which can be designed for the double screw rotor profile of any curve. The design criterion of face type line has established a strictly sealed screw type line, which lays the foundation for establishing the pair screw meshing model and internal compression screw. In the third chapter, the working characteristics of the existing internal compression screw vacuum pumps are revealed, and the design method of the internal compression screw rotor with three stages smooth transition is put forward, and a series of few series and three stages are designed. The internal compression volume progressive change screw rotor, a self balanced internal compression screw rotor model is constructed, and the optimal design model of self balancing screw rotor is established. The foundation is laid for the comparison analysis of the channel type of the screw vacuum pump and the research of the small series internal compression screw vacuum pump. The fourth chapter is based on the basic hypothesis and the quality conservation. Law, an isentropic flow coefficient method is proposed to calculate the mass flow, the mass flow calculation model of the screw vacuum pump channel is set up, the model of the screw vacuum pump channel is built, the connection topology of the working chamber is established, and the calculation method of the minimum gap area of the gap between four channels is put forward, and the discrete and multistage screw vacuum pump is constructed. The model of the working characteristics of the multistage screw vacuum pump in the stable state is established. The fifth chapter, according to the calculation model of the working characteristics of the screw vacuum pump, calculates the gas pumping rate and the corresponding consumption power under different pressure. According to the test standard, the testing scheme of the working characteristics of the screw vacuum pump is formulated and the test party is based on the test side. The case tests the working characteristics of the vacuum pump. The comparison shows that the simulation value is in agreement with the engineering value and achieves the expected effect. In the sixth chapter, three sections of the progressive and self balanced internal compression vacuum pumps are designed and developed for the factors affecting the working characteristics. The pumping speed, the power consumption and the input of the two kinds of screw vacuum pumps are simulated and tested respectively. The curve of the pressure of the two kinds of pump is more than 85%, the working pressure below 10000Pa is more than 40% compared with the equal pumping speed and other screw vacuum pumps. Among them, the energy efficiency is saved by more than 33%. In the full pressure range, the energy efficiency is more than 33%. The research work of the full text is summarized, and the further research work is put forward. The content of the work.

【學(xué)位授予單位】：浙江理工大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2016
【分類號】：TB752

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