and stable performance.
Frame
The frame is welded with steel plates. The pinion shaft bearing seat and
the upper and bottom seats of the crankshaft is made of cast steel and the
frame is processed to eliminate stress after welding, therefore, it has good
stiffness and strength. The bottom seat of the crankshaft adopts slab-reinforced
structures. There are necessary oil sump and oil pipeline systems within the
machine frame, which are used for cooling and lubrication.
Crankshaft
The crankshaft is made of cast alloy steel. The inner bore of the
herringbone gear and the crankshaft are jointed together by interference
fit and fastened by bolts and locknuts. Both sides of the crankshaft are
equipped with double-row spherical roller bearings to the heart to
ensure stability in operation and to improve the bearing capacity.
Pinion Shaft
It is made of forging alloy steel. On the shaft, there is a herringbone gear
whose tooth surfaces are of medium hardness. There is a shaft extension at
both ends, where belt wheels or chain wheels may be installed.
Crosshead
The integral crosshead is cast with nodular cast iron, so the crosshead
has good abrasion resistance. Apart from RS-F500 drilling pumps, which
adopt a guide tube structure, all other crosshead guides are made up of an
upper and a bottom guide. Gaskets may be added under the crosshead
guide to regulate the concentricity. The extension rod is connected to
the crosshead by a flange with a pin to ensure the concentricity of the
crosshead and the extension rod. The packing adopts a double sealing
structure, which realizes good seal performance.
Fluid Cylinder
The fluid cylinder is made of forged alloy steel. The RS-F series pumps
adopt straight-through type cylinders, with saw tooth threads at the top
side. They are small in size and the volumetric efficiency is very high.
The cylinder surface is processed by nickel-phosphor plating to
increase its corrosion resistance. The three cylinders of a pump are
interchangeable.
Valve Assembly
F500 adopts API#5 valves, RS-F800 and FS-F1000 drilling pump adopt
API#6 valves, RS-F1300 and FS-F1600 drilling pumps adopt API#7 valves,
RS-F2200 drilling pump adopts API#8 valves and the parts of the fluid end
of F800 and F1000 are interchangeable. The parts of the fluid end of RS
F1300 and RS-F1600 are interchangeable.
Lubrication System
The lubrication system adopts pressure lubrication combined with
splash lubrication, or otherwise it may also adopt external motor driven
lubrication according to the user.
The Spraying System
The spraying system is composed of a spraying pump, water tank, and
spraying pipes. The spraying pump is a centrifugal pump. It can be driven
by a belt wheel installed on either side of the pinion shaft or by a motor,
using water as cooling and lubricating liquid.
Cantilever Hoister System
To reduce the labor intensity of drilling workers, and for easy
field operation, the RS-F1300 and RS-F1600 pumps are equipped with a
cantilever hoister, which is used to help remove or replace the liner or
other parts of the fluid end.
