Squealing sound from the centrifugal pump’s seal
Thread Content
We have a centrifugal pump that uses two-stage mechanical seals in series. A few days ago, the seal in the first stage started leaking, so it was replaced. After the replacement, the seal continued to make a whistling sound, quite loud and continuous. However, the temperature of the seal wasn’t high, around 50 degrees. The mechanic couldn’t identify the cause and kept suggesting that we wet the belt. Could anyone help analyze whether this is an installation issue or a problem related to operation?
Are you sure the sound is coming from inside the mechanical seal? I have dealt with the issue before, where the bearing dust covers and the bearing caps were too close to each other, causing friction and noise
It’s likely that the noise is caused by air leakage due to improper installation of the mechanical seal.
What does it mean to keep watering the belt? It is best to clarify the operating conditions, the specific type of mechanical seal, the flushing method, etc., so that everyone can carry out an analysis. Is the tone audio very stable, or does its volume fluctuate?
The issue lies with the mechanical seal; this has happened with other pumps as well in the past – sometimes, by spraying some water on the surface of the mechanical seal, the noise is reduced or disappears
It’s possible that the setting screw of the mechanical seal on the shaft isn’t tightened properly, causing it to rotate along with the shaft.
Is it the sound coming from the mechanical seal? If the friction pair is made of such a material, its service life will definitely not be good
It’s probably the bearing near the mechanical seal; if the mechanical seal makes a whistling sound, that’s terrible
But indeed, the sound does decrease after spraying water on the mechanical seal; there was noise before as well, but it was intermittent
I don’t know; I work in the manufacturing field and don’t understand these things, so I’m asking everyone
That mechanical seal no longer leaks; the medium is no longer escaping