Why is one of the rotating and stationary rings in a mechanical seal wider than the other?
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Suddenly came a guess; let’s discuss it. 1. Why are the stationary and rotating rings of a mechanical seal of different widths, and which one is wider and which one is narrower? 2. Which is harder and which is softer, the stationary ring or the rotating ring of a mechanical seal? 3. Is there any connection between the above two questions?
A way to determine the stationary and rotating rings: one of the contact surfaces between them is wider while the other is narrower; the narrower one is the rotating ring, and the wider one is the stationary ring!
The end with the spring is usually the moving ring
In most cases, it is indeed true that the static ring needs to be wide. Are there any cases where the static ring is narrow?
It matches my guess exactly. Can this pattern be confirmed?
In most cases, the carbon ring is narrow while the alloy ring is wider, as the alloy ring provides better heat dissipation； Normally, the alloy ring serves as the moving ring, which may be due to its high strength. This is only common in single-face mechanical seals.