双作用搅拌装置(DAA)由丹麦一家公司申报专利,目前已经在食品和化工行业的搅拌器上得到了应用。据报导采用DAA搅拌装置的搅拌器比传统装置搅拌器便宜10-20%。其关键在于搅拌叶片设计在搅拌轴上的一组四个搅拌叶片,其中有二个呈水平安装,有两个垂直安装。这四个搅拌叶片除跟随搅拌轴公转外,还可以绕其自身的安装轴作自转,见图1。这种自转是由被搅拌物料的运动产生的。图2是一个二级搅拌器的运动示意图。当搅拌器主 The DAA was patented by a Danish company and has now been applied to stirrers in the food and chemical industries. It is reported that the stirrer using the DAA stirring device is 10-20% cheaper than the conventional device stirrer. The key lies in a set of four stirring blades that are designed on the agitating shaft of the agitating blade, of which two are horizontally mounted and two are vertically mounted. In addition to following the revolution of the stirring shaft, these four stirring blades can also rotate around their own mounting axis, see Figure 1. This rotation is caused by the motion of the material being stirred. Figure 2 is a schematic diagram of the motion of a secondary mixer. When the mixer master