Wedoany.com Report on Mar 14th, Household appliances such as electric fans and blenders can operate smoothly for long periods without frequent maintenance, largely thanks to the powder metallurgy oil-impregnated bearings installed inside. These bearings are not simple metal sleeves; their interiors are filled with micron-sized pores that act as miniature oil reservoirs. This special physical structure endows the bearings with a unique self-lubricating function, allowing them to autonomously regulate their lubrication state during equipment operation.

In terms of working principle, powder metallurgy oil-impregnated bearings utilize the material's thermal expansion and contraction properties. When mechanical components generate heat during operation, the bearing matrix expands due to heat, squeezing the lubricating oil from its pores to the friction surface to form an oil film. After shutdown and cooling, excess oil is reabsorbed into the pores due to capillary force. This intelligent circulation mechanism of "releasing oil when heated and reabsorbing when cooled" effectively solves the problem of traditional bronze bushings requiring regular manual oiling, while significantly reducing mechanical noise and equipment failure rates.

Currently, powder metallurgy oil-impregnated bearings are widely used in hair dryers, coffee machines, printers, and various light industrial machinery. Their advantages of quiet operation, maintenance-free nature, and low cost make them a mainstream choice in the home appliance sector. Through the application of this micro-lubrication technology, industrial manufacturing can achieve higher operational reliability with simpler structures. In the future, with further optimization of powder metallurgy processes, this type of powder metallurgy oil-impregnated bearing will play an even more crucial supporting role in micro-motors and automated office equipment.