Regarding the labyrinth seal for SKF SNL bearing housings used in Shen drum blowers
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The labyrinth seals of the SKF SNL bearing housings used in our Shenmu blowers rotate along with the rotation of the blower; some of them are out of sync with the shaft, some are in sync with it, and some simply do not rotate at all. There is a machine on site that rotates, and sometimes it makes abnormal noises. I would like to ask the experts: what is the state of a labyrinth seal when it is operating normally? In the diagram, it seems that there is an O-ring on the seal shaft; logically, it should rotate together with the shaft. 95
The model of the shaft seal according to the manufacturer’s information is TSN S
You can take a look at the inpro seal video
Are you referring to the sealing ring, that is, the lip seal? If so, it shouldn’t rotate. If the model is correct, it can be bonded using glue!
This device is pretty tough, just like an orphaned child. Disheveled and unclean: o
It’s the gear seal, right? It shouldn’t be rotating
The centrifuge comb seal of SHENGU is usually secured with countersunk screws and should not rotate freely.
I consulted SKF’s engineers; please note that this type of … S-model labyrinth seal rotates along with the shaft. There is a sentence in the installation manual: Use a hollow sealing tube to fix the labyrinth seal to the shaft. The reason for not rotating is that it is necessary to first confirm that another form of sealing might be in use; a double-lip seal, for example, would prevent rotation. Additionally, if the shaft becomes too thin, or if the hollow tube used for securing the seal loses its elasticity, this can cause the component to fail to rotate. If there is no oil leakage, it can be ignored; however, it should be inspected and replaced during major repairs. The noise caused by the labyrinth seal requires other possible causes to be investigated: how can there be such loud noise from a rubber tube that is simply fixed in place (with a loose fixation)? The force of friction must cause the seal to adjust its position along its axis. Even if it doesn’t rotate at all, the assembly dimensions of the seal and the bearing seat will not cause friction between the seal and the shaft.