Connecting rod of small end bearing

Connecting rod of small end bearing: It is often used as a sliding bearing, which is often matched with a piston pin or a cross head pin to reduce the wear of the piston pin.

On the cross-head type connecting rod, the small end bearing often adopts a cylindrical bushing made of tin bronze or lead bronze, or a steel bushing with anti-friction alloy on the inner surface. Oil holes are drilled on the inner surface of the sleeve, and some have oil grooves for lubricating oil to enter into the lubrication.

In order to prevent the occurrence of dry friction when the diesel engine starts, some bearings have oil storage grooves on the inner surface. A small number of small high-speed diesel engines use needle bearings for the small end bearing of the connecting rod. On the crosshead connecting rod, the small end bearing is a split sliding bearing, which is often made separately from the shaft. The anti-friction alloy is directly cast on the inner surface of the bearing, and oil grooves and oil holes are made on the surface of the anti-friction alloy. For lubrication.

Since the small end bearing works under high pressure and swing conditions, it is difficult to lubricate. In order to improve the reliability of lubrication, some models adopt a special oil pump for each cylinder to strengthen the lubrication. In order to improve working reliability, self-adjusting or platform type connecting rod small end bearings are often used.