Product Description

Power End (frame, pinion shaft, crankshaft, crosshead and extension rod )

• Continuous tooth herringbone gear.
• one-piece alloy steel crank.
• Renewable crosshead guide.
• The frame is made of welded steel plate to provide the frame with high strength, good rigidity and light weight.
• The extension rod packing is duplex seal structure to provide the good seal result.
• The power end uses the combined lubricating system of forced lubrication and splash lubrication.
• The frame is made of welded steel plate and stress relief treated to obtain the good rigidity and high strength. The place where the crankshaft bearing is fitted is strengthened by using ribbed plates. The frame is furnished with the necessary oil basin and oil way system for cooling and lubricating purpose.
• Crankshaft is made of casted alloy steel and furnished with herringbone gear, connecting rod and bearing. The tooth form of the big geared ring is herringbone gear. The gear bore and the crankshaft surface are interference fitted and they are both fastened with bolts and lock nuts. The big end of the connecting rod is mounted on three eccentric straps of the crankshaft through single row short cylindrical roller bearings and the small end on the crosshead pin through double row long cylindrical roller bearing. Double row radial spherical roller bearings are mounted at both ends of the crankshaft.
• Pinion shaft is made of forged alloy steel on which a herringbone gear with the medium-hard tooth surface is machined. For easy maintenance, the single row radial long cylindrical roller bearing with inner ring (without sides) is used. The both ends of the pinion shaft extend out, so that the sheave or the sprocket can be mounted on either end.

Crosshead and Extension Rod are made of ASTM A****3 mechanize cast iron featured by good abrasion resistance and long service life. Upper and lower guides are used for F***0 and F****0 mud pumps, so that the concentricity can be adjusted by adding shimes beneath the lower guide. F***0 mud pump is the cylindrical structure. The connection between the crosshead and the extension rod is made by using bolted flange. The rigid connection ensures the concentricity of the crosshead and the extension rod. The coupling is used for connecting the extension rod to the piston rod. The light-weight coupling enables the extension rod and the piston rod to connect to each other easily and reliably.