Centrifuge is an important equipment in pharmaceutical industry, it can be used for blood separation, virus research, DNA research, drug purification and so on. Centrifugation is to use the powerful centrifugal force generated by the rotor of the centrifuge to speed up the settling speed of particles in the liquid and separate the material with different settling details and buoyancy density in the sample.
How to Reduce Vibration in High-Speed Centrifuges?
In general, only when the working speed of the centrifuge is not at the critical speed can the rotor move smoothly. For the low-speed centrifuge with low working speed, half of them should increase the critical speed as much as possible so that the centrifuge can operate below the critical speed.
However, due to the user’s improper operation, often cause some accidents. Experts said that once the vibration occurred at a high speed, should immediately stop the operation of the key, with a faster speed down gear to stop the centrifuge, all personnel should also quickly leave the scene, so as to avoid the occurrence of shaft accidents such as injuries.
Experts remind: “the user can not power off during the operation, once the power off, the brake (rapid deceleration) will not be, the rotor will be slow to stop. Some accidents are caused by improper operation of centrifuges.
What Causes Centrifuge Speed Instability?
The speed of centrifuge is to change the conduction Angle of thyristor through adjustable resistance, and then the thyristor controls the voltage at both ends of the motor after rectifying, so as to achieve the purpose of controlling the speed.
The motor speed is unstable. From the principle analysis, the following four reasons are possible.
(1) Adjustable resistor. Since the adjustable resistor is installed on the control panel and is used very frequently, it is common for the centrifuge to have poor contact after a long time of use.
(2) There are also many problems with thyristors, usually breakdown short circuit, open circuit, failure to trigger or poor internal contact.
(3) There is a problem with one of the four rectifier diodes.
(4) There is carbon powder or poor contact of the carbon brush itself between the motor rotor and the commutator.
How to Troubleshoot Abnormal Noise in Centrifuge Operation?
According to technical experts, abnormal noise during centrifuge operation is usually caused by problems such as imbalance, loose mechanical parts, bearing wear, motor failure, or unstable equipment support. If these problems are not solved in time, they may damage the performance and safety of the equipment.
In order to reduce noise and extend the service life of the centrifuge, users are advised to implement the following maintenance measures:
Clean the rotor regularly to prevent residue accumulation and imbalance; check and lubricate the bearings to ensure smooth rotation and reduce friction; balance the sample load and properly distribute the sample weight to avoid vibration.
For more complex problems, it is crucial to contact professional technicians or equipment manufacturers for inspection and repair in time to ensure safe and efficient operation of the centrifuge.
