Failure Analysis and Optimization of Crosshead-Cylinder Hole Tribo-Pair in a Reciprocating Plunger Pump

Abstract

In this paper, the failure of the crosshead-cylinder hole tribo-pairs in a reciprocating pump is reported. The crank-connecting rod-crosshead mechanism was analyzed to obtain the velocity of the crosshead. The material, hardness, and roughness of the new crosshead and cylinder holes were determined. Macroscopic observations, material properties and roughness analyses, scanning electron microscopy (SEM) analyses, energy dispersive spectrometry (EDS) analyses, and lubricating oil quality analysis were conducted to clarify the potential reasons for the failure of the crosshead-cylinder hole tribo-pairs. Lubrication oil degradation is likely to cause the failure of the crosshead-cylinder hole tribo-pairs. The effects of the oil supply system design and surface roughness on the anti-wear behaviors of the crosshead-cylinder hole tribo-pairs are discussed.