초록 ▼

A walking beam compressor has a rod collar assembly attached to the top cap of the compressor cylinder with bearings which reduce side loading on the seals and bearing surfaces in the top cap. A top cap assembly supports a pair of vertically stacked seals sandwiched between three inserts. Upper and

A walking beam compressor has a rod collar assembly attached to the top cap of the compressor cylinder with bearings which reduce side loading on the seals and bearing surfaces in the top cap. A top cap assembly supports a pair of vertically stacked seals sandwiched between three inserts. Upper and lower inserts each house a wear ring so that the respective wear rings are above and below the seals. The piston is divided into an upper section and a lower section to facilitate the mounting of a peripheral seal at the mating surfaces of these sections. The peripheral edge of each section has a recess for receiving a wear ring. A structure is provided to facilitate separating the upper and lower sections during disassembly.

대표청구항 ▼

[ What is claimed is:] [1.]1. A piston rod seal assembly for a walking beam compressor cylinder having a top cap, a piston within said cylinder and a piston rod connected to said cylinder and extending through said top cap, said piston rod seal assembly including:a cylindrical cavity formed in said

[ What is claimed is:] [1.]1. A piston rod seal assembly for a walking beam compressor cylinder having a top cap, a piston within said cylinder and a piston rod connected to said cylinder and extending through said top cap, said piston rod seal assembly including:a cylindrical cavity formed in said top cap surrounding said piston rod;an annular lower insert positioned in said cylindrical cavity;a lower annular seal and a lower wear ring mounted on said annular lower insert for engagement with said piston rod;an annular center insert positioned above said annular lower insert;an upper annular seal mounted on said annular center insert for engagement with said piston rod;an annular upper insert positioned above said annular center insert and having an upper wear ring for engagement with said piston rod; anda hollow insert cap positioned over said inserts and attached to said top cap.