The strength of the shearing action of the high shear emulsifying machine directly affects the final fineness, which is mainly related to the sharpness of the blade, the hardness, the gap between the rotating stator and the two cutting edges The movement speed and the particle size allowed to pass through are related. Generally, the sharpness, hardness, clearance of rotating stator and the particle size allowed to pass through are basically fixed or not I want to change. Then, the relative motion speed of the cutter is the most / influential factor, which is expressed as the circumferential linear speed of the rotor (because the stator is stationary), and the linear speedIf the degree is high, the density of cutting or impact of the fluid flowing in the radial direction will be high, so the refining effect will be strong, and vice versa.

The truth of the industrial production speed of the high shear emulsifying machine is that the greater the linear speed is, the better. When it reaches a very high value, there is a tendency to block the flow (just as the ability is high A strong warrior can turn his sword to resist the arrows from shooting), so the flow becomes very small and the heat is very high. Some materials will gather in turn, making the result not Ideal. So, is the stirring speed we usually say the shear speed? The velocity is divided into angular velocity and linear velocity, and the shear velocity of course refers to linear velocity, linear velocity=Angular velocity x diameter x π, so why is the rotational speed (angular velocity) of the emulsifying machine used in industrial production generally only 3000rpm or 1500rpm, while laboratory emulsification The rotating speed of the machine is as high as 0000rpm or 280000rpm, that is, the diameter factor is taken into account, so that the shear line speed of the two is close, and the final effect is also close Yes.

From another point of view, the characteristics of laboratory tests are few. Therefore, if the physical size of the rotating stator should adapt to the corresponding small number, the diameter must be small To compensate for the negative effect of small diameter on the linear speed, it is necessary to increase the angular speed of the rotor, thus forming the "high speed" of the experimental instrument. Yikai high shear milk The chemical machinery combines the law of linear speed and sets a scientific and reasonable linear speed value. The homogenization speed of the laboratory homogenizer is 8000 rpm, and the homogenization speed of the laboratory vacuum emulsifier is 8000 rpm 6000 rpm, and the homogenization speed of high shear emulsifying machine from pilot scale to large-scale production is 2800 rpm.