Page 58 - Reciprocating Compressors Operation Maintenance
P. 58
Design and Materials for Reciprocating Compressor Components 45
Bearing Pedestal
Crankshaft Connecting
Rod
FIGURE 2-1. Heavy duty, continuous-service, water-cooled reciprocating
compressor.
common in compressors designed with dual parallel frames, like the hor-
izontal duplex types built as recently as the 1960s.
Modern designs take advantage of pressure lubrication systems from a
gear-type oil pump, while some smaller units rely on splash to lubricate
the bearings and crossheads.
A connecting rod is fastened to the crank throws; this component uses
a two-piece sleeve bearing liner. At the opposite end of the connecting
rod and secured to it by a pin through a bushing is the crosshead. This
crosshead converts the rotary motion of the crank into reciprocating
motion, and the piston rod is fastened to it.
The crosshead rides in a guide and is supported by shoes or slippers.
These shoes are made from a bearing material of aluminum or babbitt.
