The centrifugal machine uses refrigeration, because of the moisture of the air, in the centrifugal cavity frosting, after closing dwon, which defrosting into water. Most foreign low-speed large capacity centrifuges without drainage holes, with more water accumulates in the centrifugal cavity. At this point, the user should remove the rotor and clean up the water. When reinstalling the rotor, it must be installed well to avoid accident.
In the design and manufacture of centrifuges, the imbalance of the rotor machining error has been remedied by the dynamic balance test, but all centrifuges have their promised sample imbalance.
The centrifuge manufacturers compete with other manufacturers in order to maximize the imbalance limit of the centrifuge, and try to give a larger value. On this larger value, the centrifuge can operate, but the resulting imbalance force at a frequency of N times per minute suddenly impact bearings and stents, centrifuges are damaged. Therefore, the users of those expensive centrifuges, it’s better that try to find a good balance after centrifugation, the centrifuge life is good.
The rotor is not installed well, or the sample is unbalanced, the amount is too large, when the centrifuge starts. Modern imported centrifuges have unbalanced protection, which is when the imbalance exceeds a certain limit, the power should be automatically stopped, so that the centrifuge stops. But in these circumstances, it is too late, there will be a vicious accident. One of the malignant accidents is the broken shaft, because the high speed rotating shaft suddenly broken, the centrifugal rotor without support, in the centrifugal cavity disorderly turn collision, can make the centrifuge machine turn to 270 degrees angle. At this point, if there are staff or equipment next to it, it will cause casualties and damage to equipment accidents.
Centrifuge rotor is usually made of aluminum alloy, after corrosion, which reduced the strength, it’s more easier to bring accident. Aluminum alloy is easy to be corroded by liquid. After cleaning, dried by blowing machine or reversed for a period of time, then use it after ensure it’s dired, Some blood stations import centrifuges, and 6 aluminum cups should have 6 plastic supports. Bleeding bag should be placed directly in the aluminum cup in the plastic support. Pay attention to crack in test tube. If the test tube (especially the repeated use of the test tube) there are cracks, must avoid to use, or in the use of tube rupture will cause the rotor rotation out of balance, and cause the broken shaft accidents etc..
