FLUID MEDIA HANDLING MACHINE (VERSIONS) Russian patent published in 2003 - IPC

FIELD: materials handling facilities. SUBSTANCE: invention relates to fluid medium handling facilities, particularly, to pumps containing design member rotating in fixed base member inside ring clearance. Fixed base member separates high-pressure inner space from low-pressure outer space in which rotating design member is installed in extension support insulated from inner space by means of sealing system. Ring clearance is formed between two shells of sliding bearing made if hard wear- resistant materials and forming first stage of sealing, as to principle of action of radial sliding bearing, behind which return device is axially installed to return leaks of medium from first sealing stage into machine. Second stage of sealing is axially installed after return device, said stage being made in form of cup and/or contact seal. EFFECT: improved systems of seals. 11 cl, 3 dwg