Connecting rod for pump and assembling method thereof

Abstract

The invention relates to a connecting rod for a pump and an assembling method thereof, and relates to the technical field of plunger pumps. The connecting rod for the pump comprises a rod body, one end of the rod body is provided with a large head, the other end of the rod body is provided with a small head, the large head and the small head are both in a circular ring shape, the diameter of the large head is greater than that of the small head, the large head, the small head and the connecting rod are integrally formed, and the rod body is made of a high-strength and high-toughness copper alloy material. The assembling method of the connecting rod for the pump comprises the steps that S1, a crankshaft pin of a crank is arranged in the large head of the connecting rod for the pump in a sleeved mode; S2, a cross head pin is arranged in the small head in a sleeved mode; and S3, the connecting rod is assembled into the pump. The connecting rod and the assembling method have the advantages that the processing cost is reduced and the assembling time is saved.

Description

technical field [0001] The invention relates to the technical field of plunger pumps, in particular to a pump connecting rod and an assembly method thereof. Background technique [0002] As one of the main moving parts in the power end of the three-cylinder single-acting plunger pump, the connecting rod is used to convert the rotary motion of the crankshaft into the reciprocating motion of the piston, thereby realizing the discharge pressure and delivery flow of the plunger pump. , so the connecting rod bears continuous high-frequency periodic impact force, inertial force and bending force, which requires that the connecting rod material should not only have sufficient strength and stiffness, but also have ultra-high fatigue strength to meet the requirements of the plunger. Severe working condition requirements of the pump. [0003] Existing as figure 1 The shown connecting rod includes a shaft, one end of the shaft is provided with a bushing, and the other end is provided...

AI Technical Summary

Problems solved by technology

[0004] During the use of the connecting rod, the big and small ends of the connecting rod need to be respectively embedded in the bearing bush and the bushing, so as to carry out relative sliding cooperation with the crank pin of the crankshaft and the cross pin of the piston. Requirements, this is very difficult for the processing and assembly process of the connecting rod, bearing bush and bushing, and the large number of existing connecting rod parts further increases the processing and assembly process. Requirements greatly increase the cost of processing and manufacturing and the man-hours of parts assembly, thereby increasing the product cost of the entire connecting rod assembly. Not only that, but the increase in the number of parts will also lead to an increase in the assembly error rate, making the product in the subsequent use process. The instability is greatly improved, which leads to an increase in the failure rate of the power end of the three-piston pump during use, thereby reducing the reliability and practicability of the product

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