Main Shaft Bearing and Connecting Rod Bearing of Diesel Generator Set 2

This article continues to introduce the maintenance of the main shaft bearing and connecting rod bearing of diesel generator sets.

Due to the different shapes of the piston inner cavity and the different connecting rod journal spacings of in - line and V - type diesel engines, the structures of the connecting rods vary. In some engine models, the connecting rod shank is drilled with a long oil hole, and a small hole of Φ1.5 is drilled at the top of the small end of the connecting rod, which serves as a nozzle to inject oil into the piston inner cavity for cooling; the bearing shell surface is grooved with an oil groove. Note that the upper and lower bearing shells are strictly distinguished and should not be installed incorrectly.

In addition to wear and peeling, the corrosion of sliding bearings is also a notable issue, which mainly depends on the quality, temperature, pressure of the engine oil, and the bearing load. Corrosion is most likely to occur in the high - load areas of the bearing. Organic acids and sulfides generated by the deterioration of the lubricating oil at high temperatures are the direct causes of bearing corrosion. The burning of the bearing, commonly known as "bearing burning", is mainly caused by a too - small clearance, poor lubrication, and improper operation.

If a fault occurs in the main bearing shells or connecting rod bearing shells of a diesel generator set, Dingbo Power, a diesel generator manufacturer, should immediately stop the machine for processing. Otherwise, the crankshaft may seize, increasing the difficulty of repair and the maintenance cost of the diesel generator set. The connecting rod big - end bearing shells are generally made of steel - backed high - tin aluminum alloy and are positioned in the connecting rod big - end hole by the tongues on the bearing shells. During maintenance, if peeling, melting, severe scoring on the inner wall of the bearing shell, or looseness of the back of the bearing shell are found, the bearing shell should be replaced. For scoring caused by foreign objects, the bearing shell can continue to be used after the foreign objects are removed and the surface is smoothed.

Guangxi Dingbo Power Equipment Manufacturing Co.,Ltd was founded in 1974 and is one of the earliest manufacturers of generators and diesel generator sets in China. The company has a registered capital of 218.88 million yuan. The company covers an area of 86,000 square meters and a building area of 55,000 square meters. There are more than 660 employees, including 456 professional technicians and 106 senior technicians. It has 46 sales and service outlets nationwide. The main products are diesel engines, generator sets, and diesel generators, providing users with a one-stop service of design, supply, debugging and maintenance at any time. Dingbo has always insisted on using first-class talents, building first-class enterprises, manufacturing first-class products, creating first-class services, and making every effort to build a first-class domestic enterprise. If any question please feel free to visit our website https://www.dieselgeneratortech.com/ or send email to [email protected].