Page 89 - Reciprocating Compressors Operation Maintenance
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76 Reciprocating Compressors: Operation and Maintenance
FIGURE 2-35. Conventional non-lubricated compressor, vertically, oriented
(Worthington Type VBB) (Source: Plant Engineering, October 18,1979).
The crankcase components are conventional; both compressors con-
tain a forged crankshaft, anti-friction bearings, a forged connecting rod,
and a cast crosshead.
Both the lube and non-lube compressors have the same lubrication
system for these components—an oil pump, which flows oil through the
crankshaft, passes through the connecting rod to lubricate the crosshead
pin bushing and the crosshead. This oil is retained in the frame with a
frame oil head and metallic scraper rings.
On the totally non-lubricated compressors a housing is used between
the frame and the cylinder, along with a longer piston rod. This ensures
