Detailed explanation of oil-containing bimetallic bearings: an efficient choice for self-lubrication, wear resistance and low maintenance

Oil-containing bimetallic bearings are a mechanical component that combines special metal materials with lubrication technology. They are widely used in engineering, automobiles, home appliances and other mechanical equipment that require self-lubrication. It is composed of two metal materials, one of which plays a supporting role, and the other metal layer containing lubricant is used to reduce friction, thereby improving the service life and operating efficiency of the bearing.

Structure and principle of oil-containing bimetallic bearings
Oil-containing bimetallic bearings generally consist of two parts: inner layer and outer layer:

Outer layer material: usually made of high-strength steel or other wear-resistant materials to enhance the mechanical strength and load-bearing capacity of the bearing, and can withstand greater loads.

Inner layer material: usually composed of copper, tin, aluminum or other metals, and made into a material with a porous structure through special treatment. This porous structure can absorb lubricating oil and slowly release the lubricating oil when the bearing is running, thereby achieving a self-lubricating effect.

When the bearing is working, with the rotation of the shaft and the action of external pressure, the lubricating oil overflows from the metal pores of the inner layer, covers the contact surface between the shaft and the bearing, and forms an oil film. The existence of the oil film can significantly reduce the friction coefficient, reduce wear, and effectively increase the service life of the machine. This design avoids the trouble of frequent refueling in traditional bearings and is a low-maintenance, high-efficiency and energy-saving mechanical component.

Advantages of oil-containing bimetallic bearings
Oil-containing bimetallic bearings have the following significant advantages:

Good self-lubricating performance: The porous inner layer material contains lubricating oil, which enables the bearing to have self-lubricating function and can operate normally even without refueling for a long time.

Strong wear resistance: The metal structure design of the inner and outer layers enables it to withstand high loads and have good wear resistance, and is suitable for working under harsh conditions such as high temperature and high speed.

Fatigue resistance and impact resistance: The combination of bimetallic structure not only increases the fatigue resistance of the bearing, but also enhances its impact resistance, and can still operate stably under severe vibration and impact conditions.

Low cost: Since frequent maintenance and lubrication are not required, the use of oil-containing bimetallic bearings can save maintenance costs and lubricant costs.

Environmental protection and energy saving: Since the bearing does not need to add lubricants frequently, the consumption of lubricating oil is reduced, which is environmentally friendly and reduces the energy loss of mechanical equipment.

Application fields of oil-containing bimetallic bearings
Because oil-containing bimetallic bearings have the characteristics of self-lubrication, low friction, high temperature resistance and high load, they are widely used in the following fields:

Automotive industry: used in engines, gearboxes, brake systems and steering systems to reduce friction and increase the service life of parts.

Household appliances: such as electric fans, air conditioners and washing machines, which require long-term operation and are difficult to maintain frequently.

Construction machinery: such as large equipment such as excavators and cranes, which can maintain stable performance under high loads and harsh environments.

Aerospace and shipbuilding industry: Under high temperature, high speed and high load conditions, oil-containing bimetallic bearings can provide stable support and lubrication.

Agricultural machinery: In complex outdoor environments, oil-containing bimetallic bearings can effectively cope with adverse conditions such as dust and moisture.

Manufacturing process of oil-containing bimetallic bearings
The manufacturing process of oil-containing bimetallic bearings is relatively complex, and it is necessary to ensure the bonding strength of the inner and outer metal layers and the stability of the pore structure. The process generally includes the following steps:

Material preparation: Select suitable metal materials and choose different inner and outer layer combinations according to application requirements.

Sintering process: Use powder metallurgy technology to sinter the porous metal inner layer on the outer substrate to form a tightly bonded bimetallic structure.

Oil immersion treatment: Add lubricating oil to the sintered porous inner layer to ensure that the inner metal pores are filled with lubricant, thereby forming an oil-containing structure.

Surface treatment: In order to improve the surface finish and corrosion resistance, surface treatments such as nickel plating and spraying may also be performed.

200#B Oil-Retaining Bimetallic Bearing (Steel Backing+Copper Sinter With Solid Lubricating Dispersed)