摘要
应用法向等距原理构建了基于始端一次曲率半径函数方程的涡旋型线;建立了基于母线参数的吸气腔、压缩腔和排气腔容积数学模型,得到了涡旋压缩机的轴向、切向和径向气体力随曲轴转角的动态变化历程,研究了一次曲率半径函数型线参数对压缩机动力学特性的影响。数值模拟结果表明:一次曲率半径函数始端重构型线的参数显著影响涡旋压缩机的动力学特性;母线始端一次曲线与基圆渐开线连接点处曲率半径的不连续性导致了径向气体力的波动和极性变化,进而对径向间隙的密封、泄漏损失和轴承寿命产生直接影响。
croll profile plays a key role in dynamic property of the machine.The scroll profiles were constructed by using normal-equidistant-line method based on baseline with the first-order function of radius of curvature in accordance with continuity conditions.The models of suction chamber,compressing chamber and discharge chamber were established based on the parameters of the baseline.The dynamic process of dynamic gas forces in a scroll compressor verse crank angle was obtained.The influence of the first-order curvature radius parameters on dynamic property was approached.The numerical simulation showed that the first-order curvature radius parameters of top scroll profile had significant effects on dynamic property of a scroll machine.Furthermore,the discontinuity of curvature radius of connecting point on the top first-order and involutes led to fluctuation and polarity change of radial force.Thus,the sealing force-load of radial clearance,leakage loss and bearing life would be influenced directly.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2011年第3期213-218,共6页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金资助项目(50965011)
甘肃省自然科学基金资助项目(0710RJZA061
1014RJZA025)
关键词
涡旋型线
动力学特性
曲率半径
一次曲线
径向力
Scroll profile
Dynamic property
Radius of curvature
First-order curve
Radial force
