A plunger pump power end

Abstract

The invention relates to a plunger pump power end. The plunger pump power end comprises a machine body, a crankshaft arranged in the machine body and N transmission assemblies driven to do radial reciprocating movement by the crankshaft, the N transmission assemblies are connected with N plungers at the hydraulic end correspondingly, and N is a natural number; and the two ends of the crankshaft are connected with the machine body through bearings. The plunger pump power end is characterized in that an integrated seal box baffle is arranged at the junction of the machine body and the hydraulic end and provided with N open-type seal box holes; and seal boxes in seal connection with the N plungers are arranged in all the seal box holes correspondingly. Compared with the prior art, the plunger pump power end has the advantages that by arranging the integrated seal box baffle at the junction of the machine body and the hydraulic end, the N open-type seal box holes are formed in the integrated seal box baffle, and the seal boxes in seal connection with the N plungers are arranged in all the seal box holes correspondingly; and the N plungers are arranged without intervals, so that no nose bridge exists between cylinders, and the phenomenon that the nose bridge between the cylinders is cracked and broken is avoided.

Description

technical field [0001] The invention relates to a power end of a plunger pump. Background technique [0002] The power end of the reciprocating plunger pump generally includes a fuselage, a crankshaft, a connecting rod, a crosshead, and an intermediate rod installed in the fuselage. The intermediate rod is connected to the plunger at the hydraulic end. The crosshead and the intermediate rod drive the plunger to reciprocate; in the above connection structure, except for the roller bearing installed at the connection between the crankshaft and the fuselage, sliding friction structures such as tile bushings are used between other friction parts. The crosshead and the intermediate rod are generally connected by thread or flange, and the intermediate rod is connected with the plunger. The crosshead slideway of the fuselage is generally of the integral cylindrical type or the thin-walled cylinder liner inlay type. If the multi-cylinder structure, the inter-cylinder are isolated f...

AI Technical Summary

Problems solved by technology

The power end of the traditionally designed plunger pump often has design deficiencies, such as low efficiency and high noise. In practical applications, it often occurs that the end of the slideway hole of the fuselage is rough and heated, and the stress concentration cracks, especially the nose bridge between the cylinders is easy to crack, and the middle rod The seal is prone to oil leakage, difficult to assemble and disassemble, especially the connection with the hydraulic end is difficult to disassemble after being corroded on site, and the power end is large in size. These inherent deficiencies have affected the development of reciprocating plunger pumps to high efficiency, energy saving, and lightweight

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