1,The function of diesel engine bearing shells
The diesel engine bearing shell is a component that connects the engine crankshaft and connecting rod. Its main function is to reduce friction and wear, prevent direct contact between the high-speed rotating crankshaft and connecting rod, and protect the normal operation of the diesel engine. Its specific functions include the following aspects:
(1). Relieve friction: Due to the high-speed rotation of the diesel engine crankshaft and connecting rod, direct contact will generate significant friction. The bearing shells can alleviate the friction between the crankshaft and connecting rod through minimal oil film, reduce energy consumption, and improve fuel economy.
(2). Reduce wear: The high-speed rotation of the crankshaft and connecting rod will cause significant wear on the bearings. Without bearing shells, the lifespan of the crankshaft and connecting rod will be greatly shortened.
(3). Noise reduction: The bearing shells also have the effect of reducing frictional noise, reducing the noise level of diesel engines.
(4). Increase power output: The lubrication effect of diesel engine bearings can improve power output and improve the working efficiency of diesel engines.
2,Classification of diesel engine bearing shells
Bearings are divided into two types based on different materials: metal bearings and polymer bearings. Metal bearing shells are widely used in heavy-duty diesel engines, while polymer bearing shells are used in light diesel engines and automotive diesel engines.
Metal bearings are divided into two types based on material: white metal bearings and copper lead alloy bearings. White metal bearing shells have high hardness and wear resistance, but their manufacturing process is complex and costly, and they are mainly used in large diesel engines. Copper lead alloy bearings have lower costs, but poor hardness and wear resistance, and are commonly used in small and medium-sized diesel engines.
Polymer bearings are mainly made of polytetrafluoroethylene (PTFE), which has good wear resistance, corrosion resistance, and self-lubricating properties, as well as resistance to high temperatures and pressures. Polymer bearings are suitable for long-term operation of diesel engines and high-speed diesel engines.
3,Maintenance methods for diesel engine bearing shells
(1). Regular replacement: Diesel engine bearings should undergo regular inspection and replacement to ensure their good working condition and avoid malfunctions.
(2). Cleaning the lubrication system: Long term operation of diesel engines can accumulate impurities and debris in the lubrication system. Regular cleaning of the lubrication system and replacement of filters can maintain good lubrication performance.
(3). Maintain appropriate temperature: Diesel engine bearing shells are prone to damage and aging when working in high-temperature environments for a long time. So maintaining an appropriate operating temperature for diesel engines can extend the lifespan of the bearing shells.
(4). Use high-quality lubricating oil: Using high-quality lubricating oil can reduce the wear and friction of bearing shells and extend the service life of diesel engines.
In short, diesel engine bearing shells are an important component of diesel engines, and their role is important and irreplaceable. The maintenance and upkeep of diesel engines, especially the protection of bearing shells, is the key to extending the lifespan of diesel engines.
