Gardner Denver HD-2250, Руководство по эксплуатации и обслуживанию

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Page 11
CROSSHEAD ASSEMBLY
The crosshead assembly features a one
piece, high strength connecting rod. This
connecting rod is a much more durable
design
than the old multiple piece
connecting rods commonly used by other
companies. This one piece design was first
developed by Gardner Denver. It features a
hardened and ground thrust area for
extended wear capabilities.
Oil is fed under pressure to the knuckle
bearing through drilled passageways to
further extend the durability of this
assembly. The knuckle bearing features
lubrication grooves designed to feed oil to
all the wearing surfaces. It is made of a
high
grade bearing material, with a babbit
coating
for improved break-in
characteristics.
The wrist pin which is made of heat treated,
ground, high strength alloy steel, serves
only to return the crosshead assembly. It
bears none of the thrust load generated at
maximum pressure operation.
GEAR TRAIN
The gear train features precision ground,
heat treated, helical cut gears on each end
of the crankshaft. They are driven by gears
integrally machined into the alloy steel
pinion shaft. These gears are precision
timed to each other which eliminates time
consuming, inexact, manual timing of these
gears.
CRANKSHAFT
The crankshaft is made of high strength
alloy steel that has been precision machined
and heat treated for fatigue resistance and
long wear. It has been drilled with
lubrication passageways to provide oil for all
the connecting rod journal bearings as well
as the crosshead assembly.