發(fā)布時間：2018-09-19 07:23

【摘要】：目前食品、醫(yī)療、電動汽車等行業(yè)領(lǐng)域所需要的壓縮氣體必須潔凈無油。而無油渦旋壓縮機(jī)作為第四代最先進(jìn)的容積式流體機(jī)械,具有效率高、噪音低、結(jié)構(gòu)簡單、節(jié)能和高可靠性等優(yōu)點(diǎn),目前廣泛地應(yīng)用于上述領(lǐng)域。為了更好地了解無油渦旋壓縮機(jī)的變形規(guī)律,提高渦旋壓縮機(jī)的效率,本文采用有限元分析法對渦旋盤在實(shí)際工況下的變形和應(yīng)力進(jìn)行了詳細(xì)分析。主要研究內(nèi)容如下:(1)在渦旋型線幾何理論的基礎(chǔ)上,模擬計(jì)算了無油渦旋壓縮機(jī)從吸氣開始到排氣結(jié)束整個過程中工作腔容積隨主軸轉(zhuǎn)角的變化;分析計(jì)算了動渦旋盤所受氣體力和自轉(zhuǎn)力矩隨主軸轉(zhuǎn)角的變化;對無油渦旋壓縮機(jī)自潤滑密封機(jī)構(gòu)的工作原理進(jìn)行了詳細(xì)的闡述;(2)通過在靜渦盤背面布置溫度和壓力傳感器測得每個腔室的溫度和壓力,將測量得到的溫度與壓力作為有限元分析的輸入條件,通過對動渦盤進(jìn)行熱分析、結(jié)構(gòu)分析以及多物理場耦合分析,結(jié)果表明:渦旋齒最大變形量位于齒頭部位,耦合場的最大變形量為0.169mm;采用控制變量的方法對渦旋盤在不同齒高、齒厚的條件下進(jìn)行了對比分析,結(jié)果表明:渦旋齒的變形量隨著齒高的增大而變大,隨齒厚的增大而減小;(3)在Solidworks中完成了動靜渦旋盤的模擬裝配,采用有限元法對不同軸向和徑向間隙裝配下的渦旋盤進(jìn)行了詳細(xì)分析,得到了無油渦旋壓縮機(jī)的最佳裝配間隙,間隙值為:軸向間隙為5μm,徑向間隙為20μm;對比分析了靜渦旋盤外側(cè)定位銷的個數(shù)以及位置對靜渦盤的變形影響;通過搭建的測試系統(tǒng)對0.6m3/min的無油渦旋壓縮機(jī)進(jìn)行了性能測試。
[Abstract]:The compressed gases needed in food, medicine, electric vehicles and other industries must be clean and oil free. The oil-free scroll compressor, as the fourth generation of the most advanced displacement fluid machinery, has the advantages of high efficiency, low noise, simple structure, energy saving and high reliability. In order to better understand the deformation law of the oil-free scroll compressor and improve the efficiency of the scroll compressor, the deformation and stress of the scroll disk under the actual working conditions are analyzed in detail by using the finite element analysis method. The main research contents are as follows: (1) on the basis of the geometry theory of the vortex line, the variation of the volume of the working chamber with the spindle rotation angle during the whole process from the beginning of suction to the end of exhaust is simulated and calculated; The variation of the air force and the rotation moment of the moving vortex disk with the spindle rotation angle is analyzed and calculated. The working principle of self-lubricating sealing mechanism of oil-free scroll compressor is described in detail. (2) temperature and pressure of each chamber are measured by placing temperature and pressure sensor on the back of static vortex disk. Taking the measured temperature and pressure as the input conditions of finite element analysis, the thermal analysis, structural analysis and multi-physical field coupling analysis of the moving vortex disk are carried out. The results show that the maximum deformation of the vortex tooth is located at the head position of the tooth. The maximum deformation of the coupling field is 0.169mm. A comparative analysis of the vortex disk with different tooth height and tooth thickness is carried out by using the control variable method. The results show that the deformation of the vortex tooth increases with the increase of the tooth height. (3) the simulation assembly of the static and static vortex disk is completed in Solidworks. The finite element method is used to analyze the vortex disk with different axial and radial clearance in detail, and the optimum assembly clearance of the oil-free scroll compressor is obtained. The clearance value is 5 渭 m for axial clearance and 20 渭 m for radial clearance. The effects of the number and position of positioning pin on the deformation of static vortex disk are compared and analyzed. The performance of 0.6m3/min oil-free scroll compressor is tested by the test system.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TH45

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本文編號：2249433