摘要：本文主要考察组合桨转速比、桨叶间间距、桨叶的旋转方向及桨叶直径4个影响因素对异速复合叶轮搅拌槽内功率特性的影响。主要通过扭矩法记录实验扭矩，并通过数据处理获得功率值。实验设备是直径为0.3m的搅拌釜，装配由透平桨和斜叶桨为组成的组合桨。通过实验得出各条件下的搅拌功率特性。实验研究表明：组合桨同向旋转时，转速保持不变的桨叶功率由于相互作用随另一桨叶转速的增加而减小，且趋势逐渐减弱。组合桨桨叶间距变大，桨叶间相互作用减小，组合桨功率变化趋势弱于低间距时的变化趋势。组合桨异向旋转时，转速固定桨叶功率随另一桨叶转速的增加而增大，且趋势逐渐减弱。在转速不变情况下，随着桨叶直径的增大，桨叶功率增加。

关键词：异速复合叶轮；搅拌功率；转速比；桨叶间距；旋转方向

 Study on Power Characteristics in Coaxial Stirred Tanks

Abstract : In this paper, the power characteristics of the agitator tank with differ-ent speeds of composite impellers are studied through four factors: the ratio of the rotor speed, the distance between the impellers, the rotation direction of the impeller, and

impellerdiameter. Mainly through the torque method to observe the experimental values and calculate the powerconsumption. The experimental equipment is a coaxial mixer with a diameter of 0.3m equipped with Rushton turbine and pitched blade turbine. The stirring power characteristics under various conditions are obtained through experiments. Experimental studies show that when the combination impeller rotates in the same direction, the power of the impeller with fixed rotational speed decreases with the increase of the rotation speed of the other impeller, and the tendency decreases gradually. The spacing between the impellers of the coaxial mixer increases, the interaction between the impellers decreases, and the extent of the mutual power of the coaxial mixer is weaker than that of the low impeller spacing. When the coaxial mixer rotates in the opposite direction, the power of the impeller with fixed rotational speed increases with the increase of the speed of the other impeller, and the tendency gradually decreases. Under the condition of constant rotation speed, as the diameter of the impeller increases, the power of the impeller increases, and the interaction between the coaxial mixer increases.

Key words: coaxial impeller; power consumption; speed ratio;  impeller spacing; impeller rotation direction

目录

1. 绪论 1

1.1 搅拌槽功率的简介 1

1.2 国内外双轴组合式搅拌器的进展 1

1.2.1 国外双轴组合式搅拌器的进展 1

1.2.2 国内双轴组合式搅拌器的进展 1

1.3 搅拌器功率国内外研究现状 2

1.4研究目的和意义 3

1.4.1 研究目的 3

1.4.2 研究意义 3

2.搅拌槽功率的计算方法 3

2.1 实验装置 3

图2.1同轴异速搅拌桨 4

2.2 功率计算方法 4

2.3实验方案 4

2.3.1 各实验因素实验方案构建 4

2.3.2 不同桨叶直径的异速复合叶轮搅拌槽 4

2.3.3 不同桨叶组合并不同转速比的异速复合叶轮搅拌槽 5

2.3.4 不同桨叶组合并不同桨叶间距的异速复合叶轮搅拌槽 5

2.3.5同桨叶组合并不同旋转方向的异速复合叶轮搅拌槽 5

3.计算结果与讨论 5

3.1 转速比影响 5

3.2 桨叶间距影响 7

3.3 旋转方向的影响 8

3.4 桨叶直径影响 10

3.4.1 转速比因素 10

3.4.2 桨叶间距因素 11

3.4.3 旋转方向因素 13

3.5 结果分析 14

3.5.1 桨叶间距 14

3.5.2 旋转方向 16

3.5.3 桨叶直径 17

3.6 结论 23

（1）转速比 23

（2） 桨叶间距 23

（3） 旋转方向 24

（4） 桨叶直径 24

致谢 25

参考文献 26