The invention provides a
liquid nitrogen pump power end
assembly. The
liquid nitrogen pump power end
assembly comprises a
crankshaft box
assembly. The
crankshaft box assembly is correspondingly connected with
crosshead shell assemblies. Lubricating systems are correspondingly arranged between the
crankshaft box assembly and the
crosshead shell assemblies. The
liquid nitrogen pump power end assembly adopts split type module combination of the crankshaft box assembly and the
crosshead shell assemblies to be assembled, a crankshaft box is designed into a
welding type, crosshead shells are designed into a
casting type, compared with inblock
casting or overall
welding, the structure is simple and compact, existing
machining manners are considered,
machining, manufacturing, assembling, repairingand maintaining are facilitated, crossheads are provided with threads for connection and can be connected with fluid ends with different specifications on the market to play a role in transmitting power, a crankshaft adopts a split type structure that a straight shaft and multiple eccentric wheels are connected through flat keys, the crankshaft overall
machining difficulty is lowered, crosshead hinge pins are provided with
jackscrew holes, by means of
jackscrew fixing, axial floating of hinge pins can be eliminated, the lubricating
system can protect movement members, and the service life ofeach movement member is prolonged.