Problems with the balance pipes in centrifugal compressors
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When we talk about the balance pipe of a compressor, is it used in conjunction with the balance disk? Is there also a secondary balance tube when using a dry gas seal? Does the centrifuge have two balance tubes?
The balance tube is used together with the balance disc. It has nothing to do with dry gas seals, right?
The balance pipe of the compressor is used to balance axial forces, while the balance pipe of the dry gas seal serves as a reference gas to ensure proper flow of the main sealing gas and thus the proper operation of the dry gas seal. In addition, there is also a balance pipe for the steam seal below the turbine
The pressure tapping point for the dry gas seal is the balance tube; under normal conditions, the pressure exerted on the seal is the pressure in the balance tube.
The secondary balance line serves as a pathway for the dry gas seal gas to return to the compressor inlet; most of the seal gas that enters the dry gas seal returns to the compressor inlet, with only a small portion being vented