1. The tensile strength elongation of various centrifugal pipes are different, which should be selected according to the needs. The centrifugal pipes can be made of many different materials, such as polyethylene, cellulose, polycarbonate, polypropylene, etc. When using, make sure that the sample, solvent gradient materials do corrode the centrifuge tube cover assembly. The expired, aged, cracked corroded centrifugal pipes shall be used used at reduced speed as much as possible. Control the use times of plastic centrifugal pipe, pay attention to the specification matching. During centrifugation, the cover of the centrifuge chamber shall be opened, the rotating head centrifuge tube in rotation shall be collided with hands foreign matters.
2 for low-temperature centrifugal samples, the empty rotating head should be precooled at 2000 rpm for a certain time, the temperature should be controlled at about 0 ℃ during precooling. The rotating head can also be placed in the refrigerator for precooling for several hours, the centrifugal cup can be directly stored in the refrigerator for precooling.
3 in case of any abnormal phenomenon during centrifugation, such as abnormal noise vibration, stop the machine for inspection immediately, do continue to operate until the cause is found out.
During the daily use of the centrifuge, the levelness of the main engine shall be corrected every three months, the carbon brush of the driving motor shall be checked every 500 million revolutions of the vacuum pump oil. The carbon powder generated by the friction shall be removed with a vacuum cleaner after working for 500 hours. If necessary, the carbon brush shall be replaced the commutator shall be polished with fine sandpaper. The bearing at the driving part shall be cleaned added with high-speed lubricating grease every 1500h so. The joint between the rotating shaft the rotating head shall be coated with grease antirust oil frequently. When it is used for a long time, it shall be wrapped with antirust oil filler paper. When in use at ordinary times, start the machine at low speed for 1-2 times a month, 0.5h each time, to ensure the normal operation of all parts.
Centrifuge is a special equipment which uses centrifugal force to separate the mixed solution quickly. It has a wide range of uses. For example, in biochemical research, it studies the objects, such as biological cells, viruses serum. Protein other organic matter, inorganic matter solution, suspension, colloid other samples are separated, concentrated, extracted prepared. Among them, ordinary centrifuges (Revolution: 4000-5000 R / min) are common. The following is a brief introduction to the maintenance repair of ordinary centrifuge as an example.
Ordinary centrifuge consists of motor, rotary table governor. Casing, base other components, in which the motor speed is high under light load, but with the increase of load, the speed will drop sharply.