Packing seal having at least two axially adjacent segment rings

Abstract

A packing seal is provided which is intended in particular for reciprocating piston engines and which can be placed into a circumferential groove of a piston of such a reciprocating piston engine. The packing seal includes a first segment ring (1), which has at least two sealing segments (3) and locking segments (4) arranged between them in alternating order. These locking segments (4) and sealing segments (3) taper wedge-shaped in opposite directions radially inward and outward, respectively. In addition, the packing seal includes at least one additional or second segment ring (20) which also has at least two sealing segments (23) and locking segments (24) arranged between them in alternating order. The sealing segments (23) and locking segments (24) both taper radially inward in this case. The locking segments (24) extend over a larger arc area than the sealing segments (23). The sealing segments (23) of this second segment ring (20) overlay the locking segments (4) of the aforementioned, axially adjacent first segment ring (1). To prevent a detachment of the sealing arrangement of the packing seal (10′) during operation due to rocking motion, a securing device (40) can be provided that delimits in the axial direction a gap present between the packing seal (10′) and the groove (31) and preferably reduces this gap depending on working pressure. This securing device (40) can at the same time also decrease the radially directed, effective pressure on the packing seal in the groove base (33).

Dependencies are inferred from the claim text.