How to absorb the centrifuge
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High-speed centrifuge is one of the common experimental instruments in the laboratory. How to control its vibration range when using it? Everyone knows that the rotor can move smoothly only when the working speed of the centrifuge is not at the critical speed. For low-speed centrifuges with low operating speeds, the critical speed is generally increased as much as possible to allow the centrifuge to operate below the critical speed. The centrifuge has a very thick shaft and a high stiffness, called a rigid shaft. When the speed requirement is high, the critical speed is reduced as much as possible, the shaft is made thinner, the stiffness is small, called the flexible shaft, and the modern ultracentrifuge uses the flexible shaft.
Uneven protection is caused by accidents caused by improper operation of the user. That is, once the vibration of the rotor is greater than a certain size when the centrifuge is started, the centrifuge automatically stops at a speed. The centrifuge with such performance sometimes misses the report and cannot ensure that no accidents occur. Humidity sensor probe, stainless steel electric heating tube PT100 sensor, cast aluminum heater, heating coil fluid solenoid valve
Once the vibration occurs at high speed, immediately press the stop operation button to stop the centrifuge with the ziu fast speed reduction gear. All personnel should leave the scene quickly to avoid personal injury in case of accident such as broken shaft. Never power off, once the power is off, the brakes (fast speed reduction) are gone, and the rotor stops very slowly. The accident is generally caused by improper operation of the centrifuge. For example, if the rotor is not placed on the main shaft, the cover of the rotor is not covered, and the basket of the rotor is not placed. The structure of this accident is accompanied by a huge sound. Open the cover to see the rotor lying in the cavity. When the rotor is removed, the outer edge of the rotor can be seriously scratched, the inner wall of the centrifugal cavity will be damaged, and even the refrigerant leaks. Sometimes the rotor and the rotor cover are separated, the liquid in the test tube is sprinkled in the cavity, and the spindle is broken or severely bent.