CONTACT SEALING OF CYLINDRICAL PAIR Russian patent published in 1997 - IPC

FIELD: high pressure equipment. SUBSTANCE: sealing members include cup and protective rings consisting of number of antiextrusion rings and gasket ring. Clearances relative to sealed surface are decreased in steps from gasket ring to antiextrusion ring arranged close to cup where clearance is zero. Change in clearances is proportional to change in rigidity of antiextrusion ring materials with provision of relative protection of sealing members. Antiextrusion rings are loaded by different rigidity expanders in radial direction whose values change proportionally to change in rigidity of antiextrusion rings. EFFECT: improved quality of sealing. 4 cl, 2 dwg