Concrete mixer is determined by many parameters, so it is impossible to describe a concrete mixer with any single parameter. Shaft power (P), blade discharge (q), head (H), blade diameter (d) and mixing speed (n) are five basic parameters to describe a concrete mixer. The discharge of the blade is directly proportional to the flow standard of the blade itself, the first power of the blade speed and the third power of the blade diameter. The shaft power consumed by stirring 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.
在必然功率及桨叶情势环境下，桨叶排液量（Q）和压头（H）能够经由进程转变桨叶的直径（D）和转速（N）的婚配来调理，即大直径桨叶配以低转速（保障轴功率稳定）的打鱼注册送分 发生较高的活动感化和较低的压头，而小直径桨叶配以高转速则发生较高的压头和较低的活动感化。在搅拌槽中，要使微团彼此碰撞，方法是供给充足的剪切速率。
Under the condition of a certain power and blade type, the discharge capacity (q) and the pressure head (H) of the blade can be adjusted by changing the matching of the blade diameter (d) and the rotation speed (n), that is, the large-diameter blade with a low rotation speed (to ensure the same shaft power) of the concrete mixer produces a higher flow effect and a lower pressure head, Small diameter blades with high speed produce higher head and lower flow effect. In the stirred tank, the way to make the micro clusters collide with each other is to provide enough shear rate.
从打鱼注册送分 理看，恰是因为流体速率差的存在，才使流体各层之间彼此夹杂，是以，凡搅拌进程老是触及到流体剪切速率。剪切应力是一种力，是搅拌利用中气泡分离和液滴破裂等的缘由。须要指出的是，全部搅拌槽中流体各点剪切速率的巨细并不是分歧的。
From the theory of concrete mixer, it is the existence of fluid velocity difference that makes the fluid layers mix with each other. Therefore, the shear rate of fluid is always involved in the mixing process. Shear stress is a kind of stress, which is the cause of bubble dispersion and droplet breakage in stirring applications. It should be pointed out that the shear rate of each point in the whole stirred tank is not consistent.
经由进程对剪切速率散布的研讨标明，在一个搅拌槽中最少存在四种剪切速率数值，它们是：就桨叶区而言，不管何种浆型，当桨叶直径必然时，剪切速率和均匀剪切速率都随转速的进步而增添。
The study of shear rate distribution shows that there are at least four kinds of shear rate values in a stirred tank. They are: in terms of blade area, no matter what type of slurry, when the blade diameter is fixed, the shear rate and average shear rate increase with the increase of rotating speed.
但当转速必然时，剪切速率和均匀剪切速率与桨叶直径的干系与浆型有关。当转速必然时，径向型桨叶剪切速率随桨叶直径的增添而增添，而均匀剪切速率与桨叶直径巨细有关。这些有关桨叶区剪切速率的观点，在打鱼注册送分 减少及减少设想中须要出格把稳。因小槽与大槽比拟，小槽打鱼注册送分 常常具备高转速（N）、小桨叶直径（D）及低叶尖速率（ND）等特征，而大槽打鱼注册送分 常常具备低转速（N)大桨叶直径（D）及高叶尖速率（ND）等特征。
However, when the rotational speed is constant, the relationship between the shear rate, average shear rate and blade diameter is related to the shape of the blade. When the rotating speed is constant, the 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 shear rate in blade area need special attention in the design of concrete mixer truck. Compared with large tank, small tank concrete mixer often has the characteristics of high speed (n), small blade diameter (d) and low tip speed (nd), while large tank concrete mixer often has the characteristics of low speed (n), large blade diameter (d) and high tip speed (nd).
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