發(fā)布時間：2018-06-22 06:55

  本文選題：CP型單螺桿壓縮機 + 嚙合副��； 參考：《湘潭大學(xué)》2012年碩士論文

【摘要】：CP型單螺桿壓縮機是上世紀(jì)70年代研制的第三代高檔壓縮機，依靠星輪與螺桿的嚙合來實現(xiàn)氣體的壓縮過程，廣泛應(yīng)用于工業(yè)眾多領(lǐng)域。目前國內(nèi)只有少數(shù)壓縮機生產(chǎn)商能批量生產(chǎn)單螺桿壓縮機，但還有不少理論和加工問題任然有待于解決。研究單螺桿壓縮機內(nèi)部流動對改良壓縮機性能意義重大，應(yīng)用CFD模擬可以很大程度縮短單螺桿壓縮機相關(guān)機械的設(shè)計、優(yōu)化以及生產(chǎn)周期。 本文借助MATLAB、UG和FLUENT等軟件對CP型單螺桿壓縮機的型線設(shè)計及內(nèi)流場進(jìn)行了研究，主要內(nèi)容如下： 在微分幾何原理和經(jīng)典嚙合理論的基礎(chǔ)上分析了CP型單螺桿壓縮機動態(tài)嚙合過程以及螺桿和星輪的空間運動關(guān)系，運用坐標(biāo)變換建立了以圓柱為包絡(luò)母面的螺旋槽數(shù)學(xué)模型并推導(dǎo)出螺槽兩側(cè)面的型線方程和一次包絡(luò)嚙合條件，同時利用反包絡(luò)求解方法，推導(dǎo)出星輪齒廓的二次包絡(luò)型線方程和嚙合條件。 分析平面二次包絡(luò)星輪齒面的組成，并運用截面法將二次包絡(luò)星輪片齒面離散成曲線，運用MATLAB編程計算了離散曲線上的點建立了星輪齒面的離散點云模型。在UG軟件中將離散的點云擬合成三維曲面并建立單螺桿壓縮機螺桿和二次包絡(luò)星輪的三維實體模型。運用快速成型機制造了單螺桿壓縮機螺桿、二次包絡(luò)星輪和機殼的塑料模型，隨后應(yīng)用片體修型完成星輪特性面的建�！谌龡l接觸線。 抽取單螺桿壓縮機的內(nèi)部流場模型，考慮整個內(nèi)流場模型的邊界條件相當(dāng)復(fù)雜以及網(wǎng)格數(shù)量超出了電腦內(nèi)存的計算范圍，本文將幾何模型分兩步計算：螺旋槽內(nèi)流場的計算和出流管道的模擬。應(yīng)用動網(wǎng)格和滑移網(wǎng)格分別模擬螺旋槽的壓縮過程及出流管道的排氣，同時模擬了出流管道在螺桿四個不同轉(zhuǎn)速下的壓力、溫度、體積流量等參數(shù)，，并細(xì)致分析單螺桿壓縮機的螺槽和排氣管道的分布特性。 搭建單螺桿壓縮機試驗臺，測量單螺桿壓縮機在螺桿不同轉(zhuǎn)速的四種工況下的壓力、速度、體積流量等數(shù)據(jù)，同時應(yīng)用絕熱壓縮過程計算了螺旋槽內(nèi)氣體的壓縮情況，比較實驗數(shù)據(jù)、理論計算結(jié)果和模擬結(jié)果的誤差，確定了FLUENT模擬的合理性。
[Abstract]:CP type single-screw compressor is the third generation of high-grade compressor developed in the 1970s. The gas compression process is realized by the meshing of star wheel and screw. It is widely used in many fields of industry. At present, only a few compressor manufacturers in China can produce single screw compressor in batches, but there are still many theoretical and processing problems to be solved. It is of great significance to study the internal flow of single screw compressor to improve the performance of the compressor. CFD simulation can greatly shorten the design, optimization and production cycle of the single screw compressor related machinery. In this paper, the profile design and internal flow field of CP single screw compressor are studied by MATLAB UG and fluent. The main contents are as follows: on the basis of differential geometry principle and classical meshing theory, the dynamic meshing process of CP type single screw compressor and the spatial motion relationship between screw and star wheel are analyzed. The mathematical model of spiral groove with cylinder as envelope bus surface is established by using coordinate transformation. The profile equation and primary envelop meshing condition of both sides of spiral groove are derived, and the inverse envelope solution method is used at the same time. The quadratic envelope profile equation and meshing condition of star gear tooth profile are derived. The composition of the planar quadratic enveloping star wheel tooth surface is analyzed, and the tooth surface of the quadratic envelope star wheel is discretized into a curve by using the section method. The discrete point cloud model of the star wheel tooth surface is established by using MATLAB programming to calculate the points on the discrete curve. In UG software, the discrete point cloud is used to synthesize the 3D surface and the three-dimensional solid model of the screw and the secondary enveloping star wheel of the single screw compressor is established. The plastic model of single screw compressor screw, secondary enveloping star wheel and casing was manufactured by using rapid prototyping machine. Then, the model of star wheel characteristic surface was built by using slice body modification, and the third contact line was completed. The internal flow field model of a single screw compressor is extracted. The boundary conditions of the whole internal flow field model are considered to be quite complex and the number of meshes is beyond the calculation range of computer memory. In this paper, the geometric model is divided into two steps: the calculation of the flow field in the spiral groove and the simulation of the outlet pipe. Dynamic mesh and slip grid are used to simulate the compression process of spiral grooves and the exhaust of outlet pipes respectively. At the same time, the parameters of pressure, temperature and volume flow of the outlet pipe at four different screw speeds are simulated. The distribution characteristics of screw groove and exhaust pipe of single screw compressor are analyzed in detail. A single screw compressor test rig was built to measure the pressure, velocity and volume flow of the single screw compressor under four working conditions with different screw speeds. At the same time, the gas compression in the spiral groove was calculated by the adiabatic compression process. The rationality of fluent simulation is determined by comparing the experimental data, theoretical calculation results and simulation results.
【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH45

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 章維一,侯麗雅;光成型技術(shù)在微小機械加工中的應(yīng)用[J];高技術(shù)通訊;2000年03期

2 王仁德;單螺桿壓縮機發(fā)展簡況[J];機電設(shè)備;1994年01期

3 張金土;國外螺桿式壓縮機技術(shù)發(fā)展概況[J];機電設(shè)備;1994年02期

4 黃增 ,王仁德;單螺桿壓縮機的型線與加工[J];機電設(shè)備;1995年03期

5 田華,葛安林,馬文星,張作禮;液力變矩器泵輪內(nèi)流場的數(shù)值分析[J];吉林大學(xué)學(xué)報(工學(xué)版);2004年03期

6 任繼文;劉建書;;選擇性激光燒結(jié)主要成型材料的研究進(jìn)展[J];機械設(shè)計與制造;2010年11期

7 陶柯;王海龍;邵娟;;單螺桿壓縮機螺旋嚙合副加工技術(shù)研究[J];機械工程師;2007年11期

8 查謙,劉先啟,方宜榮,查世j;單螺桿壓縮機的現(xiàn)狀與發(fā)展趨勢[J];流體機械;1997年02期

9 刁安娜;徐明照;曾躍波;張泉明;;螺桿壓縮機排氣腔氣體的數(shù)值模擬[J];流體機械;2009年08期

10 鄧謙，麥培政，王奎章，查世j;單螺桿壓縮機設(shè)計、加工和裝配技術(shù)的研究[J];流體機械;1996年07期

相關(guān)博士學(xué)位論文 前2條

1 譚昕;平面二次包絡(luò)環(huán)面蝸桿副數(shù)字化造型理論及仿真研究[D];武漢理工大學(xué);2003年

2 孫興偉;單螺桿壓縮機垂直嚙合副制造技術(shù)研究[D];天津大學(xué);2006年

相關(guān)碩士學(xué)位論文 前4條

1 吳豐飛;CP型單螺桿壓縮機設(shè)計制造基礎(chǔ)及運動特性分析[D];湘潭大學(xué);2011年

2 李洪軍;單螺桿壓縮機轉(zhuǎn)子螺旋面加工方法及專用數(shù)控裝備研究[D];沈陽工業(yè)大學(xué);2007年

3 邵娟;單螺桿壓縮機螺旋嚙合副嚙合特性研究[D];沈陽工業(yè)大學(xué);2007年

4 崔曉微;單螺桿壓縮機三維實體建模及動態(tài)特性研究[D];沈陽工業(yè)大學(xué);2009年

本文編號：2051999