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How to find the right high speed centrifuge

2018/10/24 10:29:06      click :

  High-speed centrifuges allow us to visually see the separation of matter, so they are very popular in the medical industry, but we only see the appearance.
  A suitable high-speed centrifuge also needs to be equipped with a suitable rotor. The material of this rotor is also critical. The angle rotor used in high-speed centrifuges is mostly made of titanium alloy or aluminum alloy.
  The second is that the centrifuge tube is made of polyethylene hard plastic.
  Such centrifuges are often used to collect microorganisms, cell debris, cells, large organelles, sulfate precipitates, and immunoprecipitates.
  The high-speed centrifuge is a powerful centrifugal force generated by the high-speed rotation of the high-speed centrifuge rotor to accelerate the sedimentation speed of the particles in the liquid, and separate the sedimentation coefficient and the buoyancy density of the sample to recover the required solid or liquid. That is to say, the high-speed centrifuge can separate the solid-liquid mixture with a small difference in specific gravity.
  High-speed centrifuge rotor types: often have angular rotors, flat rotors, horizontal plug-in rotors, continuous centrifugal rotors and other types. Centrifugal tubes for high speed centrifuges are typically made of plastic and polypropylene, polyethylene, polycarbonate or borosilicate glass, borosilicate plastic, and the like. In practice, various centrifuge tubes can be selected according to different requirements. The model is light and small, easy to operate, small in sample volume, large in centrifugal force, automatic balance, adjustable in speed, stable in performance, safe and reliable. It can be used in general laboratory bench, cold storage and low temperature refrigerator. It is suitable for precipitation and concentration of small sample liquid in laboratory. It is the basic equipment used in molecular biology experiments.

High-speed centrifuge

  There have been many long-term production experiments and the factors that have caused high-speed centrifuge vibrations that we encountered during after-sales service. The vibration of the centrifuge is one of the important indicators to measure the performance of the centrifuge. In general, vibration damping can take the following two methods: active vibration reduction and passive vibration reduction. Active damping is designed to keep the operating speed of the centrifuge far from the critical speed of the rotating system (high-speed centrifuges generally design critical speeds far below the operating speed). In addition, dynamic balancing must be performed during rotor machining. Passive damping is the separation of possible vibrations from the frame and foundation with various types of dampers.
  Rubber dampers generally meet the vibration reduction requirements of high-speed centrifuges. In the case where the structure of the damper has been determined, the greater the rubber hardness, the higher the critical speed of the system. The damper with too low hardness cannot meet the requirements and is easily damaged.
  Generally in the centrifuge design, active damping and passive damping are simultaneously applied to high-speed centrifuges, generally can be divided into three parts to consider vibration reduction:
  (1) Designing the spindle bearing housing into a flexible damping type;
  (2) The entire drive system is flexibly coupled to the frame.
  (3) flexible connection between the main shaft and the motor;
  When the high-speed centrifuge is turned on, we have to check his speed to see if it is in the range corresponding to the rotor speed. Of course, if there is any looseness of the rotor parts, how is the line connected? Check the work before starting the normal connection. If he has abnormal jitter or sound, then we have to stop immediately for inspection, and we must make a corresponding record. Before the centrifuge is used, we have to adjust the brakes. If the rotor of the centrifuge exceeds the speed when it is rotating, it needs to be shut down. When the rotor is running, we can't disassemble and adjust it.
  The above is about how to better use a high-speed centrifuge. If you have any questions, please contact Shanghai Luxiangyi Centrifuge Instrument Co., Ltd.