Gas lubrication bearing is a kind of solid lubrication bearing. It is based on wear-resistant metal materials and reduces the friction coefficient by adding various lubricating materials to realize self-lubrication.

With the development of industrial technology and the progress of science and technology, the performance and reliability requirements of bearings are getting higher and higher under some special harsh working conditions. For example: low temperature, high temperature, vacuum, underwater, heavy load, etc. Due to the failure of grease lubrication and the ineffective formation of oil film, the traditional rolling bearing mainly based on grease lubrication is difficult to carry and reduce friction. However, sliding bearings that rely on solid lubricating materials can still exhibit excellent performance in this environment.

Mosaic self-lubricating bearing, as a solid lubricating bearing, is based on wear-resistant metal materials and reduces the friction coefficient by adding various lubricating materials to achieve self-lubrication. The material structure combines the advantages of high load, good impact resistance and non-metallic low friction coefficient, and is suitable for different working conditions. Inlaid solid lubrication bearings are suitable for low speeds and high loads. They can maintain a very low friction coefficient when the lubricating grease cannot maintain a complete lubricating film such as swinging, reciprocating motion, and frequent starting.

1. Copper-based inlaid self-lubricating bearings:

Copper alloy inlaid self-lubricating bearings (GB/T23894-2009) is the most widely used product in inlaid self-lubricating bearings. This material structure integrates high metal load, good impact resistance, low non-metal friction coefficient and self-lubricating properties of solid lubricants, and is suitable for different working conditions.

No need to refuel for maintenance during use. Products are widely used in high-load, intermittent or swing motions, such as steam locomotive production lines, water turbines, reservoir work/accident doors, plastic machinery, etc.

Steel base inlaid self-lubricating bearings:

The steel-based inlaid self-lubricating bearing is an enhanced product with high compression performance. It can discharge lubricating particles during the working process and form a layer of diaphragm between the sleeves. It has better anti-blocking performance than single oil lubrication, better anti-seizure performance than single oil lubrication, and has high compression performance and Ability to discharge lubricating particles during work. It is especially suitable for supporting parts of hoisting machinery.

For example: winch support, crane support, but not suitable for water or acid-base occasions.

Cast iron inlaid self-lubricating bearings:

Cast iron embedded bearing is a new solid lubricant product based on HT 250, and it is a typical material saving product. If the pressure is less than 14.5N/mm~2 or mechanical performance requirements, it can be used as a substitute for JDB-2 material, which can greatly reduce the cost and meet the requirements of use.

For example: mold guide posts, injection molding machine mold bases and other fields can be fully used.

4. Copper alloy inlaid self-lubricating bearings based on steel:

Self-lubricating steel-based copper alloy bearings are used as the basic material of the bearings, and high-strength copper alloys are cast on the surface of high-quality carbon steel. The solid bearing adopts the manufacturing process to fully combine the surface of copper and steel joints with gold, and high-strength copper alloy is cast on the surface of high-quality carbon steel as the basic material of the bearing. It not only reduces the material cost, but also improves its carrying capacity. The solid lubricant is embedded in the working surface, which can greatly reduce the friction coefficient of the bearing and achieve the purpose of self-lubrication.

5. Copper alloy inner ring self-lubricating sliding bearing:

The copper alloy inner ring self-lubricating sliding bearing is a sliding bearing with self-lubricating performance, which can rotate or swing at will. The inner ring of the bearing is made of special copper alloy, the spherical surface of the inner ring is inlaid with solid lubricant, and the outer ring is made of bearing steel, phosphated or chrome-plated and polished after heat treatment.

6. Bimetallic spiral inlaid self-lubricating bearing;

Bimetallic spiral inlaid self-lubricating bearing is a kind of continuous sliding bearing produced by solid bearing. It is a new type of thin-walled solid lubricating bearing, which is made of bimetallic plate as the base body and the alloy layer is embedded with special solid lubricant. Due to the use of high-strength bearing alloy materials as the matrix, the ideal filling material is a wear-resistant agent, a reasonable diamond block lubrication design, and the lubrication area is greater than 25%, which can play a role in good lubrication and wear resistance.

Bimetal self-lubricating bearings are used in automobile gearboxes, generators, elevators, cranes and gold control machinery.

7. Copper alloy inlaid self-lubricating bearings:

Copper alloy spiral inlaid self-lubricating bearing is also a continuous plain bearing. The solid lubrication bearing is made of a high-density copper alloy strip with a special formula, and the solid lubricant embedded on the surface is made by methods such as coiling and forming. As the copper alloy material with high elongation is used as the matrix, ultra-thin spiral sleeve can be made, and the ideal filling material can be used as a lubricant.

In order to solve the lubrication problems of high temperature, low speed, heavy load, high dust, water washing, shock and vibration in mechanical equipment, oil-free self-lubricating bearings are selected.

1. The structure of the bearing The self-lubricating bearing is a composite bearing, which forms holes of appropriate size and sequence on the metal friction surface of the bearing matrix, and embeds molybdenum disulfide and graphite in the composite self-lubricating slider on the metal sleeve to make a composite Bearing. The friction area of solid lubricants is 25%/65%. The solid self-wetting slider can work normally at 280°C. However, due to its low mechanical strength, weak load-bearing capacity, and easy deformation, embedding it in the metal groove can suppress this defect and form a metal part with a load-bearing capacity. The lubricating block plays a lubricating role.

The lubrication mechanism of self-lubricating bearings is that in the sliding friction between the sleeves, part of the self-lubricating material molecules are transferred to the metal surface of the shaft to fill the slightly uneven surface to form a more stable solid lubricating film. Make the solid lubricating film grind in between to prevent the shaft and sleeve from sticking and wearing. This reasonable combination combines the complementary advantages of copper alloys and non-metallic anti-wear materials, and is particularly suitable for motion ranges in oil-free, high temperature, high load, low speed, anti-fouling, corrosion resistance and strong radiation environments. As well as penetration in water or other solutions, it cannot be lubricated at all under special working conditions.

2. The specific surface area of the self-lubricating block is greater than the surface area of the self-lubricating block, which is related to the running speed, bearing strength, low working speed, large bearing strength, and large metal occupation area. For example, the area of the self-lubricating block of the trolley wheel self-lubricating block is about 25%, the spindle mechanism shaft bearing is fully lubricated, the bearing strength is not large, and the self-lubricating block occupies about 65% of the area.

3. Technical requirements for bearing material: The self-lubricating bearing sleeve is made of alloy copper. The lining should have high hardness, and the hardness should not be less than HRC45.

The geometry and structure requirements of the self-lubricating block. There are two types of self-lubricating sliders: cylindrical and rectangular. Self-lubricating can be cylindrical according to the area, on the other hand rectangular can be used. Any shape must be trimmed firmly to prevent it from falling off during work.

5. The linear expansion coefficient of the self-lubricating block with a gap value between the bush and the shaft is about 10 times that of steel. In order to adapt to the change of bearing temperature, the gap between the shaft and the bush is 0.032-0.15mm of the original metal parts, increased by 0.45-0.5mm. The self-lubricating block protrudes 0.2-0.4mm from the bushing metal on the side of the friction pair. This will produce sufficient lubrication and reduce power consumption during the initial grinding phase of the bearing operation.