High Quality New Diesel Fuel Injection Pump Head Rotor 096400-1740 VE Head Rotor for Fuel Pump Engine Spare

Macroscopic analysis: It is observed with the naked eye that the transmission shaft has been broken into two parts, and the fracture surface is worn. After the two parts of the fracture were restored, it was found that the fracture could not completely match due to deformation and wear, and there were small pieces missing and the shape of the broken shaft; chemical composition analysis: the chemical composition of the transmission shaft was analyzed, and the chemical composition met the requirements; mechanical performance analysis: the transmission shaft was Tensile and impact performance tests were conducted, and the mechanical properties met the requirements; scanning electron microscope analysis: a crack approximately parallel to the fracture was observed below the fracture, the crack was opened, the small piece of metal at the arrow was removed, and part of the fracture was found It is actually formed by the expansion of cracks below. Formation of original fracture and newly opened fracture

Manufacturers are reminded to conduct a comprehensive inspection of the appearance quality of the drive shafts in stock. No surface damage was found, and the appearance quality of the parts is in good condition. Manufacturers are also reminded to strengthen the surface protection of parts during the production process, confirm the surface quality of parts before assembly, pay attention to protection during the assembly process, avoid collisions, and ensure that exposed parts of moving parts are not damaged. The drive shaft has been replaced on site according to the process requirements, the high-pressure diesel pump has been reinstalled, and a running-in test has been conducted on the diesel engine after reinstallation. The test results meet the requirements. The other five diesel engines on site were cranked and inspected, and no abnormalities were found. The high-pressure diesel pump transmission shaft was color-coded and flaw-detected, and no abnormalities were found. The unit is currently operating normally and stably. This article only briefly explains the processing process of the fracture of the transmission shaft of the high-pressure diesel pump of a diesel engine. It uses failure analysis to find the cause and solve the problem by drawing inferences. With the increasing development of the shipbuilding industry and the increase in shipbuilding volume, I hope this article can provide some help to everyone who will encounter the same and similar problems in future work.