BHS Concrete mixer

Concrete mixer, concrete is a kind of with blade shaft rotating in the cylinder or tank, will a variety of raw materials mixing, make it become a kind of mixture or machine suitable for consistency.The blender is divided into several kinds, such as strong mixing machine, single-sleeper shaft mixer, two-sleeper shaft mixer and so on.Note: mixers and automatic feeding machines must be cleaned, especially in winter, which can prolong life.A blender is a mixer because the mixing machine is commonly used to mix and stir all kinds of dry mortar.

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A blender is determined by multiple parameters, and it is impossible to describe a blender with any single parameter.Shaft power (P), blade discharge (Q), pressure head (H), blade diameter (D), and stirring speed (N) are the five basic parameters of a blender.The amount of fluid in the blade is proportional to the flow rate of the blade itself, which is proportional to the third square of the diameter of the blade.The shaft power of the mixing consumption is proportional to the ratio of the fluid, the power of the blade itself, and the third power of the rotor and the diameter of the blades.Under certain power and forms of blade, blade drainage quantity (Q) and pressure head (H) by changing the diameter of the blade (D) and speed (N) matching to adjust, the large diameter blades with low speed (guarantee shaft power constant) mixer effect of high flow and low pressure head, and small diameter blade with high speed produces high low pressure head and flow effect.In the mixing tank, the only way to make the microball bump against each other is to provide enough shear rates.From the mixing mechanism, it is because of the existence of fluid velocity difference makes the fluid mixing between each layer, therefore, always involves mixing process fluid shear rate.Shear stress is a force, which is the real reason for the spread of bubbles and droplets in the mixing application.It must be noted that the size of the shear rate of the fluid in the entire mixing tank is not uniform.Through research on the distribution of the shear rate suggests that there are at least four in a stirred tank shear rate values, they are: the experimental study shows that in terms of blade area, regardless of the plasma type, when the blade diameter must be the largest average shear rate and shear rate were increased with the increase of rotational speed.However, the maximum shear rate and the average shear rate of the blades are related to the size of the blades when the speed is certain.

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The maximum shear rate of the radial blades increases with the diameter of the blades, while the average shear rate is independent of the diameter of the blades.These concepts of shear rate in the blade area require special care in the reduction and magnification of the blender.Because small chamfer is compared with the large tanks, small groove mixer (N) tend to have high speed, small blade diameter (D) and the low tip velocity (ND), and other features, and the big tank agitator tend to have low speed (N) large blade diameter (D) and features such as high tip speed (ND).

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