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自上料搅拌车是如何进行工作完成的？

所属分类：价格资讯发布时间：2020-06-08 来源：http://www.shanqijituan.cn/ 浏览量：0

多功能自上料搅拌车的搅拌机是一种机器，在这种机器中，带有叶片的轴在气缸或槽中旋转，将各种材料混合成一种混合物或适当的稠度。今天我们将介绍搅拌机的工作原理:

The mixer of the multi-functional self loading mixer is a machine in which a shaft with blades rotates in a cylinder or groove to mix various materials into a mixture or appropriate consistency. Today we will introduce the working principle of the mixer:

混频器是由多个参数决定的，用任意一个参数来描述混频器是不可能的。轴功率(P)、叶片流量(Q)、压头(H)、叶片直径(D)和搅拌速度(N)是描述水泥搅拌车的五个基本参数。叶片的流量与叶片本身的流量、叶片速度的一次方和叶片直径的三次方成正比。搅拌消耗的轴功率与流体比重、叶片本身的功率判据、转速的三次方、叶片直径的五次方成正比。

Mixer is determined by many parameters. It is impossible to describe mixer with any parameter. Shaft power (P), blade flow (q), head (H), blade diameter (d) and mixing speed (n) are the five basic parameters to describe the cement mixer. The flow of blade is directly proportional to the flow of blade itself, the first power of blade speed and the third power of blade diameter. The shaft power consumed by mixing is directly proportional to the specific gravity of the fluid, the power criterion of the blade itself, the third power of the rotating speed and the fifth power of the blade diameter.
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在某些权力和形式的叶片,叶片排水数量(Q)和压头(H)通过改变叶片的直径(D)和速度(N)匹配调整,大直径叶片与低速(保证轴功率恒定)水泥搅拌车高流量和低压力水头的影响,和小直径叶片高速度生产低的压头和流量的影响。在搅拌槽中，使颗粒相互碰撞的方法是提供足够的剪切速率。

In some power and form of blades, the number of blade drainage (q) and head (H) are adjusted by changing the diameter (d) and speed (n) of the blades, the influence of high flow and low pressure head of large diameter blades and low speed (to ensure constant shaft power) cement mixer, and the influence of high speed production of small diameter blades and low head and flow. In a stirred tank, the only way to make particles collide with each other is to provide sufficient shear rate.

从搅拌机理来看，正是由于流体速度的不同，使得流体层之间相互混合。因此，混合过程总是涉及到流体剪切速率。剪切应力是搅拌过程中引起气泡分散和液滴破裂的一种力。必须指出的是，搅拌槽内流体各点的剪切速率是不均匀的。根据剪切速率分布的研究，搅拌槽中少有4个剪切速率值。它们是:在叶片区域，无论何种纸浆类型，当叶片直径固定时，剪切速率和平均剪切速率都随着转速的增加而增加。

From the point of view of mixing mechanism, it is precisely because of the different fluid velocity that the fluid layers mix with each other. Therefore, the mixing process always involves the shear rate of the fluid. Shear stress is a kind of force that causes bubbles to disperse and droplets to break during stirring. It must be pointed out that the shear rate of each point of the fluid in the stirred tank is not uniform. According to the study of shear rate distribution, there are at least four shear rate values in the stirred tank. They are: in the leaf area, regardless of the pulp type, when the blade diameter is fixed, the maximum shear rate and the average shear rate increase with the increase of rotation speed.

而当转速一定时，平均剪切速率与叶片直径的关系与纸浆形状有关。当转速一定时，径向叶片的剪切速率随叶片直径的增大而增大，而平均剪切速率与叶片直径无关。这些叶片剪切速率的概念在搅拌器的放大和缩小设计中需要特别注意。与大缸相比，小缸水泥搅拌车通常具有高速(N)、小叶径(D)和低叶尖速度(ND)的特点，而大缸多功能自上料搅拌车通常具有低速(N)、大叶径(D)和高叶尖速度(ND)的特点。

When the rotation speed is fixed, the relationship between the maximum average shear rate and the blade diameter is related to the pulp shape. When the rotating speed is fixed, the maximum shear rate of radial blade increases with the increase of blade diameter, while the average shear rate is independent of blade diameter. These concepts of blade shear rate need special attention in the scale-up and scale-up design of agitators. Compared with the large cylinder, the small cylinder cement mixer usually has the characteristics of high speed (n), small blade diameter (d) and low tip speed (nd), while the large cylinder multifunctional self loading mixer usually has the characteristics of low speed (n), large blade diameter (d) and high tip speed (nd).

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