During high speed rotation of the centrifuge, the centrifugal force caused by the movement of the suspension in the liquid in the solid matter precipitate is formed, which is larger in mass or volume of suspension fluid body is moved to the direction of maximum radial rotor, and the quality or smaller volume portion where the rotor radius is deposited closer. Above we mentioned the concept of centrifugal force. Centrifuge is a machine that generates centrifugal force. The centrifugal force is related to rotor radius, rotation speed and sample quality: F=Rmω2 (F : centrifugal force: R : radius: m : sample quality: to : speed ) . Centrifugal force is the most important measure of centrifuge. One of the parameters is also one of the different criteria for the centrifuge grade. The centrifuge will give the maximum centrifugal force of the centrifuge when it leaves the factory. We all know that when the sample mass and radius of the rotor in operation is the same, only the rotational speed can be varied by controlling, so we tend to describe the practice of using a centrifuge speed. Such as: high-speed centrifuge, ultra-high speed centrifuge.
Second, the classification of centrifuges
There are many types of centrifuges, and we are used to classifying them from the following aspects:
According to the size of the speed can be divided into: low speed centrifuge, high speed centrifuge and ultra high speed centrifuge
According to the temperature requirements can be divided into: ordinary centrifuges and refrigerated centrifuges
Divided into rotors according to different rotors: horizontal rotor centrifuge and angular rotor centrifuge
Centrifuge in accordance with the size of the volume may also be divided: floor centrifuge, benchtop centrifuge, handheld centrifuge according to the grade of the centrifuge and the centrifuge can also be divided into an ordinary precision centrifuge.
Common features small centrifuge, in terms of speed and capacity is not accurate, such as: a normal maximum speed of the centrifuge is 5000 rpm / min, but could not reach the actual speed 5000 rev / min. Such a centrifuge is only suitable for ordinary centrifugation work, such as separating serum, concentrating urine, and the like.
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