CONTACT RING SEAL WITH GAS LUBRICANT, HAVING IMPROVED PROTECTION AGAINST CONTAMINATION Russian patent published in 2020 - IPC F04D29/12 F16J15/34 

FIELD: manufacturing technology.

SUBSTANCE: group of inventions relates to a gas-lubricated contact annular seal system which uses a gaseous fluid, particularly a compressor, as a gate medium. Seal comprises rotating contact ring (2) and stationary contact ring (3) with sealing gap (4) between them, pulling device (5) for pulling ring (3) in direction of ring (2), and fluid chamber (6), into which a gaseous fluid medium can be introduced. Seal has first retainer (20) of contact ring to retain ring (2), wherein holder (20) has first axial surface (21), second retainer (30) of contact ring to retain ring (3), wherein holder (30) has second axial surface (31). Holder (30) and ring (3) are together arranged with possibility of displacement in axial direction (X-X) on displacement surface (32). Surface (21) and surface (31) define axial gap (7). Seal has prechamber (8) near sealing gap (4), which through axial gap (7) is connected to chamber (6) for fluid medium.

EFFECT: inventions are aimed at development of contact sealing system, providing with simple design and possibility of simple economical manufacture improved protection against contamination.

12 cl, 4 dwg