涡旋压缩机型线耦合机理动态性研究

Dynamics of joggling principle for scroll profiles of scroll compressor

在涡旋型线设计研究中,研究了涡旋型线的特征几何特性和暂啮合区域所对应暂啮合角之间的耦合机理,针对涡旋压缩机型线固有耦合机理的动态特性,提出了涡旋型线暂啮合角的概念,研究了涡旋型线啮合点速度突变及其加速度突变特性,研究了涡旋压缩机型线耦合机理的动态性,通过其动态特性分析证明了涡旋型线耦合机理理论的正确性.当涡旋型线特征几何边数减小时,曲率半径变化随之变大,速度突变大,运转不平稳,振动与能量损失变大,当涡旋型线特征几何边数增加时,曲率半径变化随之变小,速度突变相应随之变小,涡旋压缩机运转趋于平稳,振动和能量损失变小,最终推出结论当涡旋型线的特征几何边数达到无穷边数即圆渐开线时,运转最平稳,振动与能量损失最小.

The performance characteristics of various involutes of scroll profiles are studied in the profiles design of scroll compressor. The joggling principle between zone of temporal action and its correspondent angle is discovered based on the analysis of geometric characteristics. Aimed at the dynamics of joggling principle for scroll profiles of scroll compressor, the notion of temporal joggling angle of scroll profiles is brought forward. Speed wave and acceleration wave of joggling point of scroll profiles are analyzed. Validity of joggling principle is testified by dynamic analysis. With the lessening number of border of earmark formation, both the curvature semidiameter and the speed wave increase. If the border number of earmark formation tends towards infinitude, i.e. circle involutes, calisthenics of scroll compressor becomes stable and the least oscillation and energy loss are achieved. With the aggrandized number of border of earmark formation, both the curvature semidiameter and the speed wave decrease. It can be concluded that the circle involutes are the best scroll profiles for multi-border formation.