Problems with dry gas seals in compressors
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The comb-tooth seal on the first layer has two rows of holes; the second row is likely to be the secondary balance tube. I would like to ask what purpose the first row of holes serves? Also, regarding this issue of a 300KPa differential pressure in the dry gas seal, what exactly is the differential pressure between which two components? The information available mentions the differential pressure between the main seal and the buffer gas, but why is the unit specified as the differential pressure between the main seal and the secondary balance tube? ?
The pressure difference is the difference between the primary seal gas pressure and the balance tube pressure!
This post was last edited by CHANGBAISHI on 2017-4-16 19:11. This question is a bit vague – “Problems with the dry gas seal of the air compressor”. What kind of compressor is it, a ‘gas’ compressor? It makes sense if it is a gas compressor for flammable or oxidizing media. The air leaking from the cylinder seal enters the exhaust chamber (the perforated area) through the comb-shaped seal ； The other side (the perforated area) is the sealed air intake chamber. A \"dry seal gas\" with a pressure higher than that of the exhaust seal chamber is formed in the intake chamber; a small amount of this seal gas leaks into the exhaust chamber and is discharged into the atmosphere through the channels. Thereby achieving dynamic sealing. The terms that need to be clarified here may be related to the industry; the term commonly used for “dry gas” in this context is “instrument air”” ； Pneumatic compressors can be referred to as fans, compressors, etc., depending on the pressure level. Standardize terms to facilitate information retrieval and discussion. (For reference)