SEAL ASSEMBLY FOR PIN JOINT

摘要

A pin joint assembly (24) for a machine (10) includes a seal assembly (51, 52, 451) having first and second seal rings (111, 112, 511, 512) and first and second gaskets or toric load rings (121, 122, 521, 522). The first and second seal rings (111, 112, 511, 512) each has a loading surface (134, 534) and a sealing face (136, 536). The first and second seal rings (111, 112, 511, 512) abut one another such that the sealing faces (136, 536) are in contacting relationship with each other. The first load ring (121, 521) engages a load ring engagement surface (130, 330, 530) of a collar (44, 244, 444) and the loading surface (134, 534) of the first seal ring (111, 511). The second load ring (122, 522) engages a load ring engagement surface (130, 330, 530) of a bushing (42) and the loading surface (134, 534) of the second seal ring (112, 512). At least one of the load ring engagement surface (130, 330, 530) of the collar (44, 244, 444) and the loading surface (134, 534) of the first seal ring (111, 511) is adapted to retain the first load ring (121, 521) in proximal relationship to the sealing face (136, 536) of the first seal ring (111, 511).