Is the bellows seal balanced or unbalanced?
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What other methods are there to increase the end-face specific pressure by increasing the spring specific pressure?
Bellows seal types should be considered balanced types. In terms of sealing performance, bellows are superior to multi-spring seals, which in turn are better than single-spring seals. Of course, bellows seals are also the most expensive
Reducing the contact area between the stationary and rotating rings can increase the end-face specific pressure.
The original poster is off-topic! I'm so confused!
Whether it is balanced or unbalanced has nothing to do with whether there is a bellows
The balanced and unbalanced types of mechanical seals have nothing to do with the bellows; bellows-type mechanical seals, as well as multi-spring and single-spring mechanical seals, are all different structural forms of mechanical seals. A balanced type is one that allows the pressure exerted by the medium on the seal to be relieved (partially or entirely). It is recommended to consult API682 for more details
It’s not easy for the poster to write a post; wait a moment!
Reply to 6# zbzhzhzh: Hello, could you explain to me what balance and imbalance mean? I am extremely grateful. <I didn’t understand what you meant by your second sentence.>
Bellows mechanical seals are generally of the balanced type. Calculate the balance coefficient (ratio of force-bearing areas)
There is no clear relationship between bellows and balanced vs. unbalanced types; one refers to the compression method, while the other refers to the end-face specific pressure
Based on the structure, the load coefficient K is calculated; if K > 1 or K = 1, it represents an unbalanced type of seal； 0