What are solid lubricated bearings?

Solid lubricated bearings, also known as self-lubricating bearings, self-lubricating bearings, oil-free bearings, sliding bearings, composite bearings, relubricated bearings, oil-free bearings, dry bearings, maintenance-free bearings, graphite copper sleeves, etc., use solid lubrication Sliding bearings with lubricating medium are more durable and reliable than ordinary sliding bearings. Solid lubricants are generally embedded in the matrix or attached to the friction surface. Through friction, the solid lubricating film generated by the lubricating material is released to isolate the direct contact between the relative motion friction pairs and reduce the friction coefficient to achieve the purpose of reducing wear and improving operating efficiency.

The characteristic of solid lubricated bearings is that they use solid lubricating materials to replace oils, greases and other lubricants. Solid lubricants have the advantages of stability, pressure resistance, wear resistance, high temperature resistance, and low loss. They are also well compatible with lubricating greases. It can lubricate grease and carry out compound lubrication at the same time. The functions are complementary and the effect is better.

Classification of Solid Lubricated Bearings:

Solid-lubricated bearings are generally divided into inlaid solid-lubricated bearings, multi-layer composite solid-lubricated bearings and integral solid-lubricated bearings.

· The lubrication of embedded solid-lubricated bearings relies on solid lubricants embedded in holes or grooves on the base to achieve lubrication. The base is generally made of metal. Commonly used base materials include various grades of copper alloys, steel, cast iron, and bimetals. wait.

· Multi-layer composite solid-lubricated bearings are made of multiple layers of materials. Each layer of material has a different function. For example, the base layer is used for load-bearing and retention; the middle layer is used to enhance bonding strength, heat dissipation, and assist anti-wear. ; The inner layer is made of solid lubricating material, which is in direct contact with the opposite wear parts for anti-wear and friction reduction.

· Integral solid-lubricated bearings refer to the entire bearing made of materials with self-lubricating properties. They are generally made of engineering plastics or high-strength resins produced by injection molding, molding, winding or machining processes, such as polytetrafluoroethylene and polyether ether ketone. , polyformaldehyde, etc. themselves have lubrication properties, a certain load-bearing capacity, good corrosion resistance, and excellent performance under specific working conditions.

The principle of Solid Lubricated Bearings:

The basic working principle of solid-lubricated bearings is that in the initial operation stage, the solid lubricant on the bearing surface forms a transfer film due to mutual friction and covers the opposite wear parts, and finally forms a solid lubricating film to achieve the purpose of self-lubrication. It cuts off the direct contact between the workpieces, thereby well protecting the abrasive parts and extending the service life of the bearings and workpieces.

Advantages of Solid Lubricated Bearings:

1. Good load-bearing performance and impact resistance;

2. No need to refuel, suitable for special working conditions;

3. Various styles and highly customizable;

4. Good lipophilicity; compatible with various lubrication methods;

5. No additional oil supply device is required;

6. Reduce the operating cost of bearings;

7. Reduce equipment downtime and maintenance;

8. Simplified design and mechanical structure;

9. No waste oil treatment is required, which is beneficial to environmental protection.