DEVICE FOR HEAT SETTING OF PISTON RINGS IN PACKETS Russian patent published in 1997 - IPC

FIELD: mechanical engineering. SUBSTANCE: invention concerns heat setting of piston and sealing rings with parallel end surfaces. Piston rings intended to be heat treated to produce uniform distribution of radial pressure are assembled into a packet on a holder-adapter in the form of cylinder having, on the side where piston ring locks are disposed, longitudinal slot with segment-shaped cross-section. Diameter of cylindrical part of holder-adapter is determined with relationship: d=(π)+S•k/π-2t, where d is diameter of cylindrical part of holder- adapter, mm; D nominal diameter of piston ring, mm; S size of piston ring lock in free state, mm; k coefficient of piston ring material shrinkage (1.15-1.25); t radial thickness of piston ring, mm; and segment sagitta is 1/3 as large as diameter of cylindrical part of holder-adapter. EFFECT: improved design. 3 dwg