Measurement of compression amount for non-encapsulated mechanical seals
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Non-mass-mounted mechanical seals (which we here commonly refer to as “pseudo-mass-mounted” seals) are those in which the seal shaft sleeve has keyways and does not have a locking ring. To measure their compression amount, one needs to determine the distance between certain steps on a depth gauge, add up the distances between other steps, and then subtract certain dimensions – those who can explain this clearly can be considered to have a good understanding of mechanical seals. For machine pump repair technicians at an advanced level or above, as well as after-sales staff from mechanical seal manufacturers, or those who have worked in the sealing departments of large chemical plants for 1–2 years, this should be quite simple, as they carry out such tasks on a daily basis. I wonder if there are any experts in this forum?
I made it with my phone; please don’t be dissatisfied if it’s not perfect! If you have any questions in WeChat Group 2 for technical exchanges at Haichuan Chemical, feel free to contact me!
Is there a more intuitive graphical representation that integrates everything into one diagram?
The final formula isn’t quite correct; it should be a+b+c+compression amount–total height of the moving ring components = e. Sorry for the mistake!
Let me tell you a simple method: when it’s back to the state shown in the diagram, does it just require installing the impeller and then putting the cover back on to complete the reassembly of the pump? Well, at this point, use a screwdriver to press down, and use a depth gauge to measure the amount of compression of this sealing set – isn’t that simple and practical? Or, you can place the impeller in place, press it down, and the amount of rebound will indicate the compression degree of this mechanical seal set；
Expert, take a look at my method; P. By the way, how do I join a WeChat group? Never knew
The steps to construct the graph are too complicated. In fact, only two depths need to be measured to determine the compression amount. The difference in the measured depths of the mating surfaces is the compression amount
The method is simple and easy to understand, but in practice, beginners may make inaccurate measurements, and even experienced workers can struggle with it. First, check the fit between the shaft sleeve and the shaft to see if it is too loose, and whether the mechanical seal is pressed too low. You know, not everyone necessarily knows! !