Here, we would like to introduce the cause and solution of a problem reported to the customer center that “the centrifuge vibrations are too large.”

First of all, there are two patterns:
(1) When nothing is inside the centrifuge and the vibrations are large while it is empty
(2) When a product, such as a liquid, is placed in the centrifuge and the centrifuge is running, and the vibrations are large

(1) When nothing is inside the centrifuge and the vibrations are large while it is empty

1) Operate after washing the basket

Is there any washing residue in the basket?
If there is unwashed residue such as crystal clinging inside the basket, the basket becomes unbalanced, and vibration increases.

It is particularly easy to miss when the crystal is deposited on the reverse side of the basket.
If you use the centrifuge for a long time, crystals may accumulate on the reverse side of the basket, and the basket may become unbalanced.
If the reverse of the basket has not been cleaned for a long time, please check the condition of the reverse of the basket.

Here is an example of a delivery that solves a customer’s problem of “wanting to do something about the crystals that accumulate at the back of the basket.”
DMNβ Supply Use Case – “Emphasis on ease of cleaning and checking cleaning”

2) Check basket for corrosion

Is there some rust or corrosion of the basket itself?

If you use the centrifuge for a long time, rust and corrosion may occur on rotating part called the basket, and the basket itself may become unbalanced.
We can check the balance of the basket and basket repairs at our company, so we will take away the basket itself and return it after checking and adjusting it.
In addition, we check and adjust the basket balance in overhauls at the Matsumoto Machine factory, so we recommend that your machine regularly undergoes overhauls at our factory.

Learn more about regular inspections

3) Check the stand for corrosion

Not the centrifuge itself but the centrifuge stand may cause the vibration to increase due to corrosion.
Please check the state of the stand once.

(2) When a product, such as a liquid, is placed in the centrifuge and the centrifuge is running, and the vibrations are large

Check whether the crystals are deposited uniformly.

(a) The crystals are partly depressed

There may be problems with the way the filter cloth is torn or stretched.

・ Check for cloth tear.

If the filter cloth is torn, a lot of liquid will flow out from the torn part, and the balance of the basket will be upset making the vibrations large.

・ Make sure that the filter cloth is tightly stretched with no gaps.

If the filter cloth is not tightly stretched, filtration leakage will occur through gaps in the basket filter cloth, and the balance of the basket will be upset making the vibrations large.

(B) The crystals are not uniform throughout

・Wrong selection of filter cloth

Vibration may increase if the filter cloth is too fine or too coarse to enable proper filtration.

・ The feed amount and the rotation speed are not matched.

If the amount of liquid to be fed into the centrifuge main unit does not match the rotation speed, then the crystals may not adhere evenly, and vibration may increase.

・The feed direction is not matched.

If liquid fed into the centrifuge main unit does not hit the basket well, the crystals may not stick evenly, and vibration may increase.
In that case, change the direction of the feed pipe or the type of feed pipe, and take measures to make the crystals stick evenly to basket.

・Insufficient liquid is removed, and the slurry has ripples

If the liquid removal does not proceed correctly, and the still liquid slurry has ripples inside the centrifuge main unit, then vibration will increase.

 

The above is an example of the cause and countermeasures when the vibration of the centrifuge is large.

There are various other factors, so please feel free to contact us if you have any trouble with centrifuge vibration.