The working principle of the blender 5, the working principle of the blender

A blender is determined by multiple parameters, and it is impossible to describe a blender with any single parameter. Shaft power (p), paddle discharge (q), head (h), paddle diameter (d) and stirring speed (n) are the five basic parameters that describe a mixer.

The liquid discharge of the propeller is proportional to the flow rate of the propeller itself, the primary square of the propeller speed and the cubic of the propeller diameter. The shaft power consumed by agitation is proportional to the specific gravity of the fluid, the power standard of the propeller itself, the cubic of the rotational speed and the fifth power of the propeller diameter. In the case of a certain power and paddle form, the paddle liquid discharge volume (q) and the pressure head (h) can be adjusted by changing the matching of the diameter (d) and speed (n) of the paddle, that is, the mixer of large diameter paddle with low speed (to ensure that the shaft power is unchanged) produces higher flow action and lower pressure head, and small diameter paddle with high speed produces higher pressure head and lower flow effect.

In the stirring tank, the only way to make the micro-clusters collide with each other is to provide an adequate shear rate.

From the perspective of the mixing mechanism, it is precisely because of the existence of the fluid velocity difference that the layers of the fluid are mixed with each other, so the mixing process always involves the fluid shear rate. Shear stress.

It is a force that is the real cause of bubble dispersion and droplet breakup in agitation applications, etc. It is important to note that the shear rate of the fluid at each point in the stirring tank is not uniform. A study of the shear rate distribution shows that there are at least four shear rate values in a stirred tank, and they are:

Experimental results show that the maximum shear rate and average shear rate increase with the increase of rotation speed regardless of the type of paddle diameter. However, when the rotational speed is constant, the relationship between the maximum shear rate and the average shear rate and the diameter of the blade is related to the slurry type. When the rotation speed is constant, the maximum shear rate of radial blades increases with the increase of blade diameter, while the average shear rate is independent of the size of the blade diameter.

These concepts regarding the shear rate of the paddle zone require special care in the scale-down and scale-up design of the mixer. Compared with large tanks, small tank mixers often have the characteristics of high speed (N), small paddle diameter (D) and low blade tip speed (ND), while large tank mixers often have the characteristics of low speed (N), large paddle diameter (D) and high blade tip speed (nd).

Mechanical Principle** Mixer Operating Principle - Mechanical Design Classics**Daquan.

1. Before using the blender, you need to wash the food and cut it into cubes for later use.

2. Put in the blade assembly first, and then put the chopped food directly into the blender.

3. Add water or milk to the machine and close the lid of the mixer tightly to avoid overflow. Plug in the power supply and press the switch for 10-20 seconds. When performing this step, press the button for a long time for no more than 30 seconds, and if you do not finish chopping after 30 seconds, please let the product rest for 2 minutes before continuing to work.

4. After stirring, unplug the power supply, and the food from the blender will be made.

5. After drinking, rinse the parts of the mixer with clean water, if it splashes into the mixer during the mixing process, disassemble the machine and clean it, wipe it dry with a dry wet rag during cleaning, and put it in the cabinet or kitchen after wiping.

According to its working principle, concrete mixers can be divided into two categories: self-falling type and compulsory type.

1. The inner wall of the mixing drum of the self-falling mixer is welded with arc-shaped blades, when the mixing drum rotates around the horizontal axis, the blades continuously lift the material to a certain height, and then fall freely and mix with each other to make the concrete in the mixing drum evenly mixed;

2. The compulsory mixer is mainly mixed according to the shearing mechanism, and there are blades rotating with the mixing shaft in the mixer, and the blades rotate at high speed to drive concrete mixing.

Concrete mixers can be divided into three types according to their working principle:Compulsory mixerSelf-falling mixerVertical shaft mixer

Compulsory mixerIt is through the rotation of two horizontal and horizontal two stirring shafts inside the mixing silo to drive the stirring arm and stirring blades on the stirring shaft to carry out compulsory mixing of various materials entering the mixing silos.

Self-falling mixerIt is through the rotation of the mixing silo that the material inside it is constantly falling freely, so as to mix and mix.

Vertical shaft planetary mixerThe structure of the mixing system is erect, and the mixing arm and mixing blades are distributed in all directions at a reasonable angle. When working, as the spindle rotates, the individual stirring blades make planetary motion. When running, when the spindle rotates, the blades are driven to force the material to be squeezed and turned over for compound actions.

There is no dead angle in the mixing process, which is suitable for stirring materials with small particle size and high requirements for uniformity.

According to its working principle, concrete mixers can be divided into two categories: self-falling type and compulsory type. Self-falling concrete mixers are suitable for mixing plastic concrete. The mixing effect of the compulsory mixer is stronger than that of the self-falling mixer, and it is suitable for mixing dry hard concrete and light aggregate concrete.

The inner wall of the mixing drum of the self-falling concrete mixer has radially arranged mixing blades.

When working, the mixing drum rotates around its horizontal axis, and the material in the mixing drum is added, and after being lifted to a certain height by the blade, it falls by its own weight, so that the movement of the cycle is repeated to achieve the effect of uniform stirring. The structure of the self-falling concrete mixer is simple, and it is generally based on mixing plastic concrete.

The linear speed of the mixing blades of the compulsory agitator is small, the wear resistance is good and the energy consumption is less, and the development is fast. The rotating shaft boom in the mixing drum of the compulsory concrete mixer is equipped with mixing blades, and the materials in the mixing drum are added, and under the strong agitation of the mixing blades, a cross flow is formed. This mixing method is far stronger than the self-falling mixing method, and is mainly suitable for mixing dry and hard concrete.

1. The main production task of the mixer is to mix cement, concrete, etc., so the first function of the mixer is to completely disperse the cement or concrete to further ensure the quality of production.

2. There is a layer of film on the surface of cement or concrete, which will be destroyed when the mixer is working, making it easier to be stirred evenly.

3. The stirring blades in the mixer accessories can promote the friction and collision between the particles of the stirred material, and the material is more fully stirred.

1. The function of the mixer is to mix concrete. Concrete mixer is a machine that mixes cement, sand and gravel aggregate and water into concrete mixture. It is mainly composed of mixing drum, feeding and discharging mechanism, water supply system, prime mover, transmission mechanism, frame and supporting device.

2. According to the nature of work, it is divided into intermittent type (batch type) and continuous type; According to the stirring principle, it is divided into self-falling type and forced type; According to the installation method, it is divided into fixed type and mobile type; According to the discharging method, it is divided into tipping type and non-tipping type; According to the structure of the mixing drum, it is divided into pear type, drum type, double cone, disc vertical shaft type and round groove horizontal shaft type.

3. The concrete mixer includes a power mechanism connected with the transmission mechanism through the shaft and a drum driven by the transmission mechanism, a gear ring arranged around the drum barrel is installed on the drum cylinder, and a gear meshing gear meshing is arranged on the transmission shaft.

4, the utility model discloses a simple and reasonable structure, after adopting gear, gear ring meshing, can effectively overcome the slippage phenomenon between the supporting roller and the mixer drum when the rainy and foggy weather; The use of a transmission mechanism further ensures the elimination of slippage between the carrier roller and the mixer drum.