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俄語
Eating fruit can supplement vitamin C, improve facial melanin, and effectively strengthen the body. Therefore, a fruit blender can bring us great convenience. For example, if you eat fruits with hard cortex at home, your teeth will be damaged, such as sugar cane. We can use a fruit blender to help us squeeze out the water, and then eat it, which is very convenient. Of course, fruit blenders and juicers are different, so the principle is the same.
Fruit mixers are determined by hand blenders Factory multiple parameters, and it is impossible to describe a fruit mixer with any single parameter. Shaft power (P), blade discharge (Q), head (H), blade diameter (D) and stirring speed (N) are five basic parameters describing a fruit mixer. The discharge volume of the blade is proportional to the flow rate 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 proportional to the specific gravity of the fluid, the power of the blade itself, the cube of the rotational speed and the fifth power of the diameter of the blade. Under a certain power and blade form, the blade discharge (Q) and pressure head (H) can be adjusted by changing the matching of the diameter (D) and rotational speed (N) of the blade, that is, the large diameter blade is matched with A fruit mixer with a low speed (guaranteeing the same shaft power) produces a higher flow action and a lower head, while a small diameter paddle with a high speed produces a higher head and a lower flow action.
In a stirred tank, the only way to make the micelles collide with each other is to provide a sufficient shear rate. From the perspective of the fruit stirring mechanism, it is precisely because of the existence of the fluid velocity difference that the fluid layers are mixed with each other. Therefore, the fluid shear rate is always involved in the stirring process.
Shear stress is a force that is the real cause of bubble dispersion and droplet breakup in mixing applications. It must be pointed out that the shear rate at each point of the fluid in the entire stirred tank is not consistent. Through the study of shear rate distribution, it is shown that there are at least four shear rate values ??in a stirring tank. They are: The experimental study shows that, as far as the blade area is concerned, no matter what kind of blade type, when the blade diameter is constant , both the maximum shear rate and the average shear rate increase with the increase of the rotational speed. But when the rotation speed is constant, the relationship between the maximum shear rate and the average shear rate and the blade diameter is related to the pulp type.
When the rotational speed is constant, the maximum shear rate of the radial blade increases with the increase of the blade diameter, while the average shear rate has nothing to do with the diameter of the blade. These concepts of shear rate in the paddle region require special care in the design of scale-down and scale-up fruit mixers. Compared with the large tank, the small tank fruit mixer often has the characteristics of high rotation speed (N), small blade diameter (D) and low tip speed (ND), while the large tank fruit mixer often has low rotation speed (N). ) characteristics such as large blade diameter (D) and high tip speed (ND).
The principle of the fruit mixer is very simple and easy to understand. Even people who are not scientists and those who do not have a lot of knowledge can make this kind of machine by combining raw materials. And when in use, the fruit blender will not bring us safety hazards. It can be said that it is a very petite machine that does not take up space. Of course, if it is just for daily purchase and use, the principle is not very important. Even if you don't read the manual, you can easily operate it.
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