Banner
Home > Knowledge > Content

The safety design of low-speed centrifuges is particular

Mar 05, 2021

The low-speed centrifuge is driven by motor directly, the special shock absorber is used to reduce vibration, and the rotor is made of high strength material, which is easy to assemble and disassemble.

Intelligent control, full digital display of speed and time, accurate control.

A rotor can be replaced by a variety of pipe racks to meet the needs of different users.

The safety design of the low-speed centrifuge is exquisite:


1. The door lock protection system adopts mechanical and electronic double-layer door locks. The centrifuge can be started only after the door lock is closed and the motor can be opened only after the motor stops moving.

2. Improving the anti-imbalance ability of the centrifuge can not only improve the sturdiness of the centrifuge, but also make it convenient for users to operate the centrifuge without strict balance or even visual balance when rotating the head.

General small centrifuges will be the whole motor on the seismic elastic support, such as rubber pad, high-speed centrifuges often use knead axis seismic.

The whole motor is suspended on the rubber bracket, and the whole shaft is placed in an earthquake-resistant buffer container, which overcomes the shortcomings of the kneading shaft, such as easy folding and breaking, so that it is stronger, more resistant to imbalance, and braking faster.

3. The swivel head recognition system can automatically identify the swivel head, limit the high speed of the swivel head, and effectively prevent the user from misoperation.

Turn a recognition is the basic principle of for each turn a set of code, or at every turn, set a certain number of small magnet at the bottom of the with hall sensor, or a photoelectric refraction ring sensor, more complex with ultrasound and radio frequency turned to identify, turn need not run can identify, even turn epicranium can ascertain whether to cover.

4. The centrifuge cavity and cover are made of strong armored steel to prevent the unbalance of the rotating head, which will lead to the swing of the motor shaft and affect the life of the centrifuge. In serious cases, the motor shaft will be broken or even the head will be fried.

Analysis of common failures of low-speed centrifuges:

After the low-speed centrifuge is switched on by the power supply, its control panel will show normal, and its cooling fan will work normally. When the start key is pressed, the intermediate relay will work, but the centrifuge will not work.

According to the fault phenomenon analysis, the power supply and control part should be normal, and the fault should be in the control board to the motor line, carbon brush and motor.

Open the centrifuge, use the multimeter to measure the line conduction from the control board to the carbon brush, and then measure the non-conduction when the carbon brush reaches the motor rotor. Carefully observe the bad contact between the carbon brush and the motor rotor. Remove the carbon brush and find that the use time is too long and too short.

Replace new carbon brush and troubleshoot.

This kind of fault is a common fault of the centrifuge, to replace the carbon brush regularly, so as to avoid the above faults.

After the low-speed centrifuge is powered on, the control panel shows normal, and the cooling fan works normally. When the start key is pressed, the intermediate relay does not work and the centrifuge does not work.

According to the fault phenomenon analysis, the power supply part should be normal, and the fault should be in the control board and the circuit to the motor, carbon brush and motor.

Open the centrifuge, use the multimeter to measure the circuit conduction from the control board to the carbon brush, and then measure the carbon brush to the motor rotor. The measured motor coil is normal.

After starting up, the multi-meter is used to measure the non-voltage output of the conductor from the control board to the motor, and it can be judged that the fault should be on the control board, in which the intermediate relay does not work, and the fault should be eliminated one by one on the control circuit of the control relay. It is found that the C9013 audion on the control board is broken down, and the new C9013 audion is worse, and the fault can be eliminated.


Back