SCROLL COMPRESSOR Russian patent published in 2016 - IPC F04C18/02 F04C29/02 

FIELD: machine building.

SUBSTANCE: group of inventions relates to scroll compressors, and in particular, to sealing structure of thrust sliding surface between fixed spiral and orbital spiral. In spiral compressor, in which orbital spiral pressing force to fixed spiral is adjusted by lubricating grooves (81) formed in thrust surface sliding between movable end plate (51) and fixed end plate, at least in area, which serves as a space (50 L) of fluid absorption in external peripheral section of compression chamber (50), length (L1) of external seal from external peripheral edge of lubricating grooves (81) formed in thrust surfaces (80) sliding to outer edge (86) of movable end plate (51), is less than length (L2) of internal seal from inner peripheral edge of lubricating grooves (81) to peripheral edge of compression chamber (50).

EFFECT: group of inventions allows to reduce orbital spiral turning and sealing and lubrication failures, when back pressure space around orbital spiral is under action of intermediate pressure or high pressure force.

3 cl, 11 dwg