Questions about the leakage pressure issue caused by failed pump seals?
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How is the pressure in the sealing chamber of a standard single-stage centrifugal pump calculated? If the seal fails, is the pressure leaking due to self-sealing the pressure in the sealing chamber or the pressure at the pump outlet?
The pressure in the sealed chamber is related to the structure of the pump and the impeller; I usually use a suction port pressure of +0.2 MPa, and the impeller has balance holes. The pressure of a seal leakage is the pressure in the seal chamber
It’s not clear whether the purpose is for theoretical needs or to solve practical problems. “If the seal fails, the seal component must be replaced. For its pressure analysis, it is best to take it to the laboratory; drilling holes at the points where you want to know the pressure and connecting pressure gauges there for actual measurement provides the most conclusive results. However, whether this pressure is known or not seems to have no direct connection with the replacement of seals. The macroscopic leakage pressure is lower than the pressure before the sealer; the pressure before the sealer is in turn lower than the pump outlet pressure, for reference.
The pressure of a seal leakage is the pressure in the seal chamber
This post was last edited by An Jianfeng_Y7f07 on 2020-7-10 08:47. Under normal operation, it is the pressure in the sealed chamber; this pressure varies depending on the design of the pump, and it can be either positive or negative.
Under normal circumstances, it is the medium in the sealed chamber that leaks out.