摘要
针对渐开线转子型线进行优化设计,在转子型线为渐开线-圆弧的基础上,引入一段高阶曲线,衔接渐开线与圆弧之间的过渡曲线,有效的消除曲线连接处所形成的"尖点"现象.通过对高阶曲线的边界限制和计算机软件的实施得出高阶曲线的方程,并根据几何方法及渐开线的性质从而得到整个转子型线的参数方程,并建立其三维模型.采用动网格技术对凸轮泵三维模型数值模拟计算,结果表明:优化后的模型出口处的"脉动"现象有很大的改善,有效的降低了工作噪音.随着转速的提升,介质在出口处的平均速度也随之升高.通过对比流场的模拟计算和实验结果,验证了模拟计算方法的可行性.
The involute rotor profile was designed with optimization based on involute-arc conjugation. A high-order curve was introduced as transition curve to connect involute with arc, so that the ＂sharp point＂ phenomenon could be eliminated for curve connecting. High-order curve equation could be obtained by using computer software and limiting its boundary condition. According to involute＇s property, the parametric equation of rotor profile was obtained geometrically and its 3-D model established. Movable mesh technology was used to carry out numeric simulation of the cam pump. The result showed that the outlet flow pulsation of the optimized model was improved a lot and noise decreased. With pump speed increasing, the mean outlet velocity of the medium was increased. It was verified by comparing simulation results with experiment results that the numerical simulation method was feasible.
出处
《兰州理工大学学报》
CAS
北大核心
2014年第3期44-48,共5页
Journal of Lanzhou University of Technology
基金
国家自然科学基金(51269011)
国家科技支撑计划(2013BAF01B02)
甘肃省自然科学基金(1212RJYA001)
关键词
凸轮泵
转子型线
动网格
脉动现象
cam pump
rotor profile
movable mesh
pulsation phenomenon
