The diaphragm coupling tore apart – let this serve as a warning to everyone
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Let me explain what happened. This morning, after arriving at the site for work, I noticed that there was a very loud noise; I immediately organized the staff to shut down the machine. When the operators went to shut it down, the entire coupling cover fell off and was flung away. . . . It almost hurt someone. . . Ah, just thinking about it gives me chills.
This is likely a pin bolt; the problem arises from long-term corrosion, which creates a gap between the bolt and the hole, leading to wobbling. As this phenomenon persists during use, it becomes more severe, resulting in deformation and tearing. Corrosion is the main cause.
Yes, it was extremely thrilling this morning. . . . . I need to consider the subsequent rectifications. . . .
There’s no need for repairs; just replace it. It is sufficient to apply preservatives regularly using glycerides with high viscosity, or to use paint.
I have another question: I’ve never worked with glycerides before. . . I have only been in contact with epoxy resin; I’m not sure if it’s the same concept
Poor centering or incorrect axial spacing can cause the diaphragm to deform over time, leading to fatigue failure and rupture of the diaphragm; of course, bolt corrosion is also a problem.
Lithium-based greases, sodium-based greases… they are those yellow glycerides with high viscosity; it’s best to use them for anti-corrosion purposes in painting applications. It is mainly for corrosion prevention.
In my opinion, this situation occurs because the pump and the motor are not aligned.