涡旋压缩机对称圆弧加直线修正型线理论研究

发布时间：2018-04-22 03:13

本文选题：对称圆弧加直线 + 修正型线　；参考：《合肥工业大学》2015年博士论文

【摘要】：近十年来,随着汽车工业的迅速发展,汽车空调市场需求日趋增长。压缩机作为汽车空调的核心装置,尤其代表压缩机技术最高水平的第四代涡旋压缩机以其机构紧凑、高效节能、微振低噪以及工作可靠等特点,应用在汽车空调上有其它压缩机不可替代的优势。相较于商用空调涡旋压缩机,汽车空调涡旋压缩机要求有高压比、大内容积比、高容积效率和运行可靠。这些技术要求必须设计新型涡旋型线或对原有型线进行改进设计。采用修正型线(对称圆弧加直线)涡旋压缩机,其较高的内容积比特别适合应用于汽车空调领域。目前,国内外对基于渐开线修正型线的研究绝大部分集中于双圆弧修正,对对称圆弧加直线修正型线研究还很少,究其原因,在于对称圆弧加直线修正型线的理论还不完善,不能建立基于各种目标的数学模型,不能从理论上对产品性能作出精确定性分析和预测产品的性能。同时,国内企业相关产品涉及压缩腔容积计算是建立在图解法基础上的。涡旋齿啮合时形成的压缩腔容积是型线修正几何学的重要内容,直接影响到动涡盘的静平衡、轴系的动平衡设计和分析。因此研究和完善对称圆弧加直线修正型线理论,建立精确的压缩腔容积和动力特性数学模型,对提升汽车空调涡旋压缩机设计、分析和计算机仿真水平至关重要。本文在国内外学者对渐开线型线圆弧类修正理论的基础上,采用理论分析、数值仿真和实验验证方法,深入研究了对称圆弧加直线修正型线的几何特征和压缩腔容积构成,详细分析了型线啮合产生的气体力特性和排气特性,建立和完善了对称圆弧加直线修正型线理论,通过仿真和实验验证了所建立型线理论的正确性,并研究了适用于汽车空调涡旋压缩机修正型线修正角的取值范围。完成的主要研究工作和成果总结如下：回顾和总结了汽车空调压缩机的发展历程、发展现状和发展趋势。从汽车空调和商用空调使用环境和条件不同入手,归纳了汽车空调压缩机独特的使用要求和技术特点,指出涡旋压缩机在汽车空调领域内使用优势,明确了进行新型型线设计或对原有型线进行改进是提升涡旋压缩机性能的主要方向之一。对称圆弧加直线修正型线几何理论研究。在圆弧类修正型线理论的基础上,深入研究对称圆弧加直线修正型线的几何特征,得出了该型线齿形生成方法,指出该型线区别于其他型线的特征参数并讨论了这些参数的取值。研究了任意涡旋圈数与压缩腔对数之间的关系。现有的有关涡旋压缩机的数学模型基本上都是针对整数圈涡旋线,或者有关于非整数涡旋圈数与压缩腔对数之间关系研究,但结论明显与实际不符。这些不足都限制了任意圈数涡旋压缩机数学模型的建立。建立了任意涡旋圈数与压缩腔之间的关系,指出对非整数圈涡旋压缩机,只要适当地修正工作腔对数,就可以准确地计算各工作腔容积。建立了对称圆弧加直线修正型线涡旋压缩机压缩腔容积数学模型。根据修正后中心压缩腔容积减少实际上是由于涡盘始端壁厚增加造成的本质特点,提出了修正后涡盘始端壁厚增加容积和实际排气角的计算方法。建立了对称圆弧加直线修正型线涡旋压缩机气体力数学模型。涡旋圈数不同,吸气角也不同,造成吸气角可能大于、等于或小于啮合侵入角,这使得压缩腔对数变化多种多样。详细剖析了任意涡旋圈数涡旋压缩机的各个不同阶段工作特性及气体力计算方法。对称圆弧加直线修正型线涡旋压缩机建模与仿真。利用VB进行了数值仿真,得到了修正型线各参数在不同修正角下变化情况,提出了适用于汽车空调技术要求的修正角的取值范围。利用UG软件生成动静涡盘和压缩机其他构件,为研制压缩机样机奠定了基础。对称圆弧加直线修正型线涡旋压缩机样机研制和实验研究。研制了修正角为119°的对称圆弧加直线修正型线涡旋压缩机样机。通过样机的实验研究证实了对称圆弧加直线修正型线设计理论与方法研究的正确性,同时实验表明,修正角β在[95°-135°]之间取值满足汽车空调压缩机的性能要求。
[Abstract]:In the last ten years, with the rapid development of automobile industry, the demand of automobile air conditioning market is increasing. As the core device of automobile air conditioning, the fourth generation scroll compressor, which represents the highest level of compressor technology, has the characteristics of compact structure, high efficiency, energy saving, low vibration and low noise, and reliable work. Compressor is an irreplaceable advantage. Compared to the commercial air-conditioned scroll compressor, the automotive air conditioning scroll compressor requires high pressure ratio, large content product ratio, high volume efficiency and reliable operation. These technologies require the design of a new type of scroll line or the improved design of the original type line. The revised type line (symmetrical arc plus straight line) scroll compression is used. The high content product ratio is especially suitable for the automotive air conditioning field. At present, most of the researches on the involute modified lines at home and abroad are concentrated on the double arc correction, and there are few studies on the symmetrical arc plus straight line correction lines. The reason is that the theory of symmetrical arc plus straight line correction is not perfect and can not be established. The mathematical model based on various targets can not make a precise qualitative analysis of the product performance and predict the performance of the product in theory. At the same time, the calculation of the volume of the compressed cavity is based on the graphical method. The volume of the compressed cavity formed by the meshing of the scroll teeth is an important content of the geometric correction of the shape line. The static balance of the moving vortex disk and the dynamic balance of the shaft system are designed and analyzed. Therefore, it is very important to study and improve the theory of symmetrical circular arc plus line correction line, to establish a precise mathematical model of the volume and dynamic characteristics of the compression chamber, and to improve the design and analysis of the scroll compressor of the automobile air conditioning and the simulation of the computer. On the basis of the theory of circular arc correction, the geometric characteristics and the volume composition of the compressed cavity are deeply studied by means of theoretical analysis, numerical simulation and experimental verification. The gas force characteristics and the exhaust characteristics of the type line meshing are analyzed in detail, and the correction of the symmetrical circular arc plus line correction is established and perfected. The model line theory is used to verify the correctness of the established line theory by simulation and experiment. The range of correction angle suitable for the scroll compressor of automotive air conditioning is studied. The main research work and results are summarized as follows: the development history, development status and development trend of the automotive air conditioning compressor are reviewed and summarized. Starting with the different conditions and conditions of automobile air conditioning and commercial air conditioning, the unique use requirements and technical characteristics of the automotive air conditioning compressor are summarized. The advantages of the scroll compressor in the automotive air conditioning field are pointed out. It is clear that the design of the new type line or the improvement of the original type line is the main direction to improve the performance of the scroll compressor. A study of geometric theory of symmetrical circular arc plus linear correction line. On the basis of circular arc modified line theory, the geometric characteristics of symmetrical circular arc plus line modified line are deeply studied, and the formation method of this type of line tooth shape is obtained. It is pointed out that the line is different from the characteristic parameters of other lines and discusses the value of these parameters. The relationship between the number of vortex rings and the logarithm of the compression cavity. The existing mathematical models for the scroll compressor are basically directed against the integer circle vortex line, or the relation between the number of non integer vortices and the logarithm of the compression cavity, but the conclusion is obviously inconsistent with the reality. These limitations restrict the mathematical model of a scroll compressor with arbitrary cycles. The relationship between the number of arbitrary vortex rings and the compression chamber is established. It is pointed out that the volume of each working cavity can be accurately calculated as long as the logarithm of the working cavity is properly corrected for a non integer circle scroll compressor. A mathematical model of the volume of the compression cavity of a symmetrical circular arc and straight line modified linear scroll compressor is established. In fact, the volume reduction is due to the essential characteristic of the increase of the wall thickness at the beginning of the vortex disc. The calculation method of the wall thickness increasing volume and the actual exhaust angle after the correction is proposed. The mathematical model of the gas force of the scroll compressor with a symmetrical circular arc and a straight line correction type line is established. It is equal to or less than the engagement angle, which makes the logarithmic changes of the compression cavity varied. The work characteristics and the calculation method of the gas force at various stages of the scroll compressor with arbitrary scroll number are detailedly analyzed. The modeling and Simulation of the symmetrical circular arc plus straight line scroll compressor is made. The numerical simulation is carried out with the VB and the modified line is obtained. The variation of the parameters at different correction angles is made and the range of the correction angle suitable for the technical requirements of the automobile air conditioning is put forward. Using the UG software to generate the static vortex disk and other compressor components, it lays the foundation for the development of the compressor prototype. The prototype of a symmetrical arc plus linear correction type scroll compressor with a positive angle of 119 degrees. The correctness of the research on the theory and method of the symmetrical circular arc plus linear modified line design is confirmed through the experimental study of the prototype. At the same time, the experimental results show that the value of the corrected angle beta between [95 [-135]] meets the performance requirements of the automotive air conditioning compressor.

【学位授予单位】：合肥工业大学
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TH45

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