Centrifuge drum
Before the centrifuge is operated, the power should be cut off and the centrifuge brake should be loosened first. You can manually turn the drum to see if there is any bite.
Check for other parts of the area for looseness and abnormality.
Turn on the power and start it in a clockwise direction (usually about 40-60 seconds from standstill to normal operation).
Usually, each equipment must be empty for about 3 hours after it arrives at the factory. It can work without abnormal conditions.
Place the material as evenly as possible.
Must be operated by a person, the capacity must not exceed the rated amount.
Never overspeed the machine to avoid affecting the life of the machine.
After the machine is started, if there is an abnormal situation, it must be stopped for inspection and repaired if necessary.
The centrifuge is running at high speed, so it is not possible to touch the drum with the body to prevent accidents.
The mesh number of the filter cloth should be determined according to the size of the solid phase particles of the separated material, otherwise the separation effect will be affected. In addition, the filter cloth should be installed with filter cloth.
The sealing ring is embedded in the drum sealing groove to prevent the material from running in.
In order to ensure the normal operation of the centrifuge, please rotate the parts every 6 months. At the same time, check the running lubrication condition of the bearing, whether there is wear phenomenon; whether the components in the brake device are worn or not, and replace it severely; the bearing cover has no oil leakage.
After the machine is used, it should be cleaned and kept clean.
Do not separate the non-preservative centrifuge from the highly corrosive materials; in addition, strictly follow the equipment requirements and regulations, and the non-explosion-proof centrifuge should not be used in flammable or explosive places.
Centrifuge "surge"
Centrifuges in refrigeration centrifugal units often experience "surge".
The principle of a refrigerating centrifugal compressor is to compress a large molecular weight refrigerant by a high-speed movement to a small space for compression, and then condense by cooling.
The energy adjustment mode of the centrifugal chiller is to adjust the compression ratio by adjusting the angle of the guide plate rotating at a high speed.
When the cooling capacity is reduced, the work done by the guide is lowered, and the pressure of the compressed gas is similar to the pressure of the gas sucked into the compressor, causing mechanical reversal of the gas backflow. (Also called "surge") Surge can cause damage to mechanical parts.
Centrifuge Development Centrifuge is a device for separating samples. It is widely used in biomedicine, petrochemical, agricultural, food hygiene and other fields. It uses the difference in precipitation speed of different substances in the centrifugal force field to realize the analysis and separation of samples. Since the advent of the centrifuge, the progress of low speed, adjustment and overspeed has been mainly reflected in the centrifugal equipment and centrifugal technology, and the two complement each other. From the perspective of rotational speed, the desktop centrifuge is basically in the category of low-speed, high-speed centrifuges. Therefore, it has the technical characteristics of low-speed and high-speed centrifuges. Its structure is mainly composed of motor drive system, refrigeration system, mechanical system, rotor and system control. The composition is only a small size and capacity compared to the floor-standing centrifuge. The development of general-purpose desktop centrifuges has blurred the boundaries of low-speed, high-speed, micro- and high-capacity centrifuges. Many rotors provide a wide range of applications for researchers, becoming the preferred model for research laboratories, such as ST2l in Sorvall, USA. , Germany's Heraeus new model Biofuge Stratos and so on.
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