组合型线涡旋压缩机型线设计与涡旋齿的有限元分析

发布时间：2018-01-03 13:00

  本文关键词：组合型线涡旋压缩机型线设计与涡旋齿的有限元分析　出处：《兰州理工大学》2011年硕士论文　论文类型：学位论文

  更多相关文章： 涡旋压缩机 组合型线 有限元分析 ANSYS Workbench

【摘要】：涡旋压缩机是近些年发展起来的一种新型压缩机械,具有效率高、能耗小、结构紧凑、运行平稳等特点。然而,传统的单一型线涡旋压缩机由于自身固有的结构特点使其空间利用系数和效率都受到了限制。在开发高压缩比涡旋压缩机时,涡旋圈数的增加使得泄漏线加长,造成压缩腔泄漏量增加,导致效率降低,同时涡旋圈数的增加也使得加工成本增大。 针对这种情况,应用组合型线来优化单一涡旋型线,利用不同啮合曲线的自身特点,使得组合涡旋型线能够兼顾吸气、压缩、排气的全过程,从而达到提高面积利用系数、增大排气量和压缩比、缩短型线长度、减少加工成本的目的。 论文首先论述组合型线的啮合条件、通用型线控制方程的推导及平面曲线理论,并利用法向等距线法生成基圆渐开线-高次曲线-基圆渐开线组合涡旋型线,推导出压缩腔的动态容积和动态压强计算方程。然后结合实例,在不改变吸气、排气容积和压缩比的前提下,对单一基圆渐开线涡旋压缩机进行优化,计算出组合型线涡旋压缩机的吸气、排气容积、工作腔压强、型线长度等数据,使之与原基圆渐开线型线的数据进行对比,结果显示:使用组合型线能够大幅减少型线长度。最后,使用ANSYS Workbench有限元分析平台对两种型线的涡旋齿进行应力与变形的分析,并对比了两种型线的应力和变形数据,结果显示:两种型线涡旋盘的应力和变形相似,不会影响压缩机的性能。因此,使用基圆渐开线-高次曲线-基圆渐开线组合型线优化基圆渐开线涡旋压缩机的型线长度是完全可行的。
[Abstract]:Scroll compressor is a new type of compression machinery developed in recent years, which has the characteristics of high efficiency, low energy consumption, compact structure and smooth operation. The space utilization coefficient and efficiency of the traditional single-type scroll compressor are limited because of its inherent structural characteristics. In the development of high compression ratio scroll compressor, the increase of the number of scroll circles makes the leakage line longer. The leakage of the compression cavity increases, the efficiency decreases, and the number of vortex coils increases the processing cost. In view of this situation, the combined profile is used to optimize the single vortex line, and the characteristics of different meshing curves are used to make the combined vortex line take into account the whole process of suction, compression and exhaust. In order to increase the area utilization coefficient, increase the exhaust volume and compression ratio, shorten the length of the profile, and reduce the processing cost. This paper first discusses the meshing condition of the combined profile, the derivation of the general control equation of the profile and the theory of plane curve, and uses the normal equidistant line method to generate the basic circle involute, the high order curve and the base circle involute combined vortex profile. The calculation equations of dynamic volume and dynamic pressure of compression cavity are derived. Then the involute scroll compressor with a single base circle is optimized without changing the suction exhaust volume and compression ratio. The suction, exhaust volume, working cavity pressure, profile length and other data of the combined scroll compressor are calculated and compared with the data of the original involute profile of the base circle. The results show that the length of the profile can be greatly reduced by using the combined profile. Finally, the stress and deformation of the vortex teeth of the two profiles are analyzed by using the ANSYS Workbench finite element analysis platform. The results show that the stress and deformation of the vortex disk are similar and will not affect the performance of the compressor. It is feasible to optimize the profile length of the involute scroll compressor by using the combination of involute of base circle, high order curve and involute of base circle.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH455

【引证文献】

中国硕士学位论文全文数据库 前1条

1 黄成东;基于信息熵的涡旋压缩机的故障诊断研究[D];兰州理工大学;2012年

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