### Pay attention to the professional embodiment of Shanghai Lu Xiangyi centrifuge each matching rotor

The **centrifuge** actually has a prototype in ancient times. The wise ancestors used the end of the rope to tie the clay pot, hold the other end of the rope, rotate the pottery, and generate centrifugal force to squeeze out the honey in the pot. It is the early application of the principle of centrifugal separation.

In the middle of the 19th century, there were three-legged centrifuges for textile dehydration and upper-suspension centrifuges for separating crystal sugar from sugar factories. These earliest centrifuges were batch operated and manually drained.

In the 1930s, continuous operation of the centrifuge appeared, and the intermittent operation of the centrifuge was also developed due to the realization of automatic control.

The centrifuge can perform liquid clarification and solid particle enrichment, or liquid-liquid separation. These separators have different structural types operating under normal pressure, vacuum and freezing conditions. Centrifuges are widely used in chemical, petroleum, food, pharmaceutical, mineral processing, coal, water treatment and shipbuilding sectors.

There are many technical indicators of the centrifuge, the most important are the following: maximum centrifugal force, maximum speed, maximum capacity, rotor model, etc.!

Centrifugation is the use of a powerful centrifugal force generated by the high-speed rotation of the centrifuge rotor to accelerate the sedimentation velocity of the particles in the liquid, separating the sedimentation coefficients and buoyancy-density materials in the sample. The magnitude of the centrifugal force (F) depends on the angular velocity of the centrifugal rotor (ˉ, r/min) and the distance of the material particles from the mandrel (r, cm). Their relationship is: F = ˉ 2 R

For convenience, F is usually expressed as a multiple of the relative centrifugal force, which is the gravity of the earth. That is, dividing the F value by the gravitational acceleration g (about equal to

9.8m/s2) How many times g is the centrifugal force that is called gravity. For example, the average radius of the centrifuge rotor is 6 cm. When the rotation speed is 60 000 r/min, the centrifugal force is 240 000 × g, which means that the centrifugal force acting on the centrifuged material is 240,000 times of the daily gravity.

Therefore, there is no proportional relationship between the rotational speed r/min and the centrifugal force g value, and it is also related to the radius. At the same speed, the radius is doubled and the centrifugal force (g value) is doubled. The relationship between the rotational speed (r/min) and the centrifugal force (g value) can be converted by the following formula:

G=1.11×(10^-5)×R×[rpm]2

G is the centrifugal force, generally expressed as a multiple of g (gravity acceleration);

The maximum speed and maximum capacity can be known by looking at the manual! Of course, this is based on the rotor model you choose. Different rotors are also different in these data. Below is a reference for everyone!

The rotor model is exquisite. Shanghai Luxiangyi Centrifuge Instrument Co., Ltd., as an old-fashioned centrifuge manufacturer, has a recommended rotor model for each centrifuge designed and developed. This is to pay attention to, this is professional!

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