A TOP PISTON RING FOR A LARGE TWO-STROKE TURBO-CHARGED COMPRESSION IGNITED INTERNAL COMBUSTION ENGINE WITH CROSSHEADS

• Main Authors: Soleil, Ayhan Günes, Fogh, Jesper Weis
• Format: Patent
• Language: English; French; German
• Published: 17.05.2017
• Subjects: BLASTING; CYLINDERS; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; PISTONS; SEALINGS; THERMAL INSULATION IN GENERAL; WEAPONS

A top piston ring (4) for use in a piston ring pack in a groove (3) in a piston (1) of a large two-stroke turbo charged uniflow-scavenged internal combustion engine with crossheads. The top piston ring (4) comprises a ring body with an upper ring face (16), a lower ring face (17), an outer ring face (11), an inner ring face (12) and first- and second engaging end portions (8,9) at a ring partition. The first engaging end portion (8) comprises a circumferentially extending finger (23), the second engaging end portion (9) comprises a circumferentially extending recess (28) shaped and sized for sealingly and slidably receiving the finger (23). The finger (23) is provided with a radially projecting tongue (51) that extends circumferentially over at least a portion of the circumferential extent of the finger (23). The recess (28) is provided with a groove (52) that extends circumferentially over at least a portion of the circumferential extent of the recess (28). The tongue (51) and groove (52) are complementary in shape in the radial and axial direction and the groove (52) receives at least a portion of the circumferential extent of the tongue (51). It is suggested that Fig. 7 is published with the abstract.