【作者】 李婷婷；

【导师】 王春林；

【作者基本信息】 江苏大学 ， 流体机械及工程， 2007， 硕士

【摘要】 迷宫螺旋泵是在迷宫螺旋密封的机理上发展而来的新型流体机械产品,具有小流量、高扬程、低比转速的突出特点,填补了常规泵类产品的性能空白区,拓宽了流体机械的应用范围。目前,新型迷宫螺旋泵的研究在国内还刚刚起步,本文所设计的矩形迷宫螺旋泵是其中的一种,鉴于目前理论体系还不成熟的情况下,主要进行了以下几个方面的工作:(1)理论设计:对迷宫螺旋槽的选型及螺纹参数选取做了研究;在相关文献的基础上,确定了设计方法,进行了水力设计计算;设计模型泵结构,绘制零件加工图;(2)CFD数值计算:通过PRO/E进行了流道的三维实体造型,采用GAMBIT完成网格划分;利用流场计算软件FLUENT,采用雷诺平均N-S方程和标准RNGk-ε湍流模型,运用基于非结构网格的SIMPLEC算法,在清水状态下,对泵内流场进行了三维湍流数值模拟,得到了内部流动特征;采用FLUENT计算进行水力性能预测,得到了外特性变化规律;(3)试验研究:确定试验方案、绘制装置图、搭建性能试验台;进行变转速性能试验,分析特性曲线,验证比例定律。通过试验研究,验证了矩形迷宫螺旋泵的设计方法的合理性,同时,与数值计算结果比较,肯定了所选模型及计算方法的正确性。由于受各种条件所限,本文所做研究还不完善,但所得结论具有普遍意义,以期对今后同类产品的开发、设计具有参考价值。更多还原

【Abstract】 Labyrinth screw pump, a new fluid mechanical production which with the striking characters of little float amount, high head and low ratio of transmission. , is developed from labyrinth sealing mechanics .So the normal pump products’ performance grey area is filled up and the fluid mechanical applied range is widened.Nowadays, researches about such new labyrinth screw pump have just been done at the first step, rectangle labyrinth screw pump is belonged to such pump. All the researches are done upon the present immature theory system, which include as follows: (1) Theoretical design: In which the parameter selecting of the labyrinth spiral scroll is studied. According to related articles, the design method is determined, with which that hydraulic power design calculation is carried out, so that the pump structure mode is designed and the component treatment chart is draw. (2) CFD numerical calculation: The flow passage three-dimensional objects are modeled through PRO/E and the non-structural mesh was generated with the help of GAMBIT. FLUENT( a special flow field calculation software) is applied to simulate the 3D flow of clean water inside the pump. The Reynolds time-averaged N- S equation and Stand RNG k-εturbulent model, SIMPLEC algorithm based on non-structural mesh are adopted , on which the internal flow characteristics are gained. FLUENT is applied to predict the performance of the pump, and the outer characters can be gained. (3)Experimental study: Both the experimental programs are determined and setting drawing is worked out so that the service test experimental bench can be established. Variable speed service test are used to analyze the performance curve then the scaling law are certified.Through the experimental research the rationality of the design method of triangular labyrinth screw pump is checked. Meanwhile, the reliability of the selected model and the preciseness of the calculation method can be validated by comparing numerical calculation results. Due to the limited conditions, the researches are unperfected. However, reference value in the future development and design of the like products will be found in this research, because of its universal significance.更多还原