摘要：本文采用扭矩法，对同轴异速组合桨叶流场中的流体运动情况进行功率测试。在直径为0.3m的搅拌釜内以斜叶桨与透平桨构型为基础，通过对桨叶旋转方向、桨叶间距、桨叶大小、搅拌桨叶的转速比等影响因素的改变，得到各种条件下的流体流场的搅拌功率关系。实验研究发现，低转速比下，逆向旋转具有较高功率，而随着转速比升高，旋转方向的影响逐渐减弱；桨叶功率随转速比增大而升高；组合桨功耗随桨叶直径增大而升高；在相同的转速条件下，当搅拌釜内液面固定在0.4m时，搅拌桨叶间距较小时搅拌功率大于间距大条件下的功率值。71082

毕业论文关键词： 同轴异速；组合桨；转速比率；搅拌功率

Investigation on the power characteristics in coaxial mixing tanks

Abstract：In this paper, the torque method was used to measure the power consumption in coaxial mixers. Based on the change of the blade and the configuration, the stirring power relationship of the fluid flow field under various conditions was obtained by changing the influence factors such as the rotation mode, spacing, the impeller size and the stirring speed ratio of the blade. It was found that at lower speed ratio, the power in co-rotating mode was higher than that in counter-rotating mode. In the case of different speed ratio, the higher the speed ratio, the higher the shaft power was. At the same speed, the larger the impeller was, the higher the power. The power consumption of coaxial mixer with smaller impeller spacing was higher than that with higher impeller spacing when the liquid level in the tank was kept at 0.4m. 

Key words: Coaxial mixer; Combined impeller; Speed ratio；Power consumption 

目   录

1绪论 1

1.1 搅拌槽装置的研究进展 1

1.2 桨叶类型 1

1.2.1 开式涡轮，径向 1

1.2.2开式涡轮，四叶片轴流式 2

1.2.3螺旋桨 2

1.3常用搅拌槽概况 2

1.3.1早期传统搅拌槽 2

1.3.2组合桨叶搅拌槽 2

1.3.3双轴异桨组合搅拌槽 3

1.4影响同轴异速搅拌槽功率特性相关因素 3

1.4.1桨叶类型 3

1.4.2转速比 4

1.4.3旋转方向 4

1.4.4液体性质 4

2研究目的和意义 4

2.1研究目的 4

2.2研究意义 5

3.实验方法 5

3.1搅拌功率 5

4.拟定的实验方案 6

4.1不同桨叶组合同轴异速搅拌槽设计 6

4.2不同桨叶组合的同轴异速搅拌槽的功率研究 6

4.3不同转速比的同轴异速搅拌槽搅拌功率的研究 6

4.4不同旋转方向的同轴异速搅拌槽的功率研究 7

4.5分析计算结果，获得同轴异速搅拌槽内的功率特点 7

5计算结果与讨论 7

5.1 旋转方向的影响