On the relationship between mechanical seal specifications and wear
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There is a centrifugal pump whose mechanical seal is installed directly on the shaft, using a 35-type seal. Now I need to add a shaft sleeve and replace it with a 50-type seal. Under the same operating conditions, does the 50 model seal have a higher linear speed than the 35 model seal, making it more prone to wear?
If the shaft sleeve is worn, just replace it; if there is no shaft sleeve, then replace the shaft
I’m asking which type of mechanical seal is more prone to wear
This post was last edited by Mechanical seal_CFVR on 2021-4-13 at 10:12. If the rotational speed remains unchanged and the diameter of the sealing surface increases, the linear velocity will definitely increase. With the dimensions of the sealed end face and the friction conditions remaining constant, the friction power mainly depends on the PcV value under operating conditions; the higher the PcV value, the greater the end-face friction power. The PcV value is the product of the specific pressure Pc at the sealing surface and the average linear velocity V of the sealing surface; it represents the working capacity of the sealing material.
High linear speed doesn’t have much to do with wear and tear; according to this theory, wouldn’t an axis with a diameter of 200 need to be extremely thick?