OIL-LESS/OIL FREE AIR BRAKE COMPRESSORS

摘要

A reciprocating air brake compressor (10) includes a crank case housing a (1 2) crank shaft (14) and a piston assembly (20) operatively connected to the cra nk shaft via a connecting rod (22). The piston assembly includes a piston (26) moveable within a bore (24) of the crank case, a piston ring (28) disposed o n a peripheral surface of the piston, and a wrist pin (30) rotatably connectin g the connecting rod to the piston. A means is provided for generating an air stream free of oil. In one embodiment, the means includes a channel extendin g through the crank shaft and connecting rod for delivering oil to the crank shaft and wrist pin bearings. The means further includes first and second sealing assemblies disposed adjacent the crank shaft and wrist pin bearings respectively. In another embodiment, the means includes crank shaft bearings and wrist pin bearings packed and sealed with grease. In another embodiment, the means includes crank shaft bearings packed and sealed with grease and wrist pin bearings and the piston ring being lubricated with a lubricant injected through a passage of the compressor.