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What is an oil-free bearing
Author:admin Date:2022-03-25
Concept It has the characteristics of high bearing capacity, impact resistance, high temperature resistance, strong self-lubricating ability, etc. It is especially suitable for heavy load, low speed, reciprocating or swinging and other occasions where it is difficult to lubricate and form an oil film, and it is not afraid of water and other acid immersion. erosion and erosion. The majority of users generally reflect that the embedded bearing not only saves oil and energy, but also has a longer working life than ordinary sliding bearings. At present, the products have been widely used in metallurgical continuous casting machines, steel rolling equipment, mining machinery, ships, steam turbines, water turbines, injection molding machines and equipment production lines.
Application of SF-2 boundary lubrication bearing: acid polyoxymethylene, with high wear resistance, bearing surface with regular arrangement and oil storage pit must be filled with lubricating grease when assembling, especially suitable for high load and low speed Under the condition of boundary lubrication, it can be used for a long time without refueling and maintenance, and refueling in the process can prolong the service life of the bearing. Extension, currently applicable to metallurgical machinery, mining machinery, water conservancy machinery, auto parts, construction machinery, agricultural machinery, etc. Oil-free self-lubricating bearing: The product is made of steel plate as the base, sintered spherical bronze powder in the middle layer, and a mixture of polytetrafluoroethylene [ptfe] and lead rolled on the surface layer. It has the characteristics of small friction coefficient, wear resistance, corrosion resistance, oil-free self-lubrication and long service life. Using it can reduce costs, reduce noise, and prevent sticking and slipping. It is widely used in sliding parts of various machinery such as printing presses, textile machines, hydraulic trucks, tobacco machines, medicinal machinery, fitness equipment, micro motors, automobiles, motorcycles, etc. Metal-based inlaid solid self-lubricating bearing: It is a novel lubricating bearing with both the characteristics of metal bearing and self-lubricating bearing. It has the characteristics of high bearing capacity, impact resistance, high temperature resistance and strong self-lubricating ability. Traditional oil-impregnated bearings: Due to the advantages of low noise and self-lubrication, oil-impregnated bearings have become the new favorite of computer CPU fan bearings, and the market demand is large; Applications in everyday household appliances are also expanding.
Installation Instructions
1. Although it is a small bump, protrusion, etc., if it is, it should be removed with oil grindstone or fine sandpaper.
2. It should be determined whether there are bumps, protrusions, etc. on the mating surface of the shaft center and shaft shell
3. Whether there is dust or mold sand attached to the bearing shell surface.
4. In order to avoid bumps during installation, a small amount of lubricating oil should be applied to the surface of the shaft and shaft housing. When installing the bearing on the shaft center, force must be applied to the inner ring, and when installing the bearing on the bearing shell, force must be applied to the outer ring. When applying force to the bearing, be careful to make the force go down vertically and evenly, otherwise the bearing will be injured. For this reason, try to avoid partial hits as much as possible.
5. The hardness of the bearing will be reduced due to overheating, so it must not exceed 100 degrees. At this time, the bearing must be suspended by steel wire, or placed on the wire guide, on the support plate, not on the bottom of the groove. When the bearing reaches the desired temperature (below 100 degrees), it should be taken out of the groove immediately and put into the shaft quickly. The bearing will shrink as the temperature drops, and sometimes there will be a gap between the shoulder and the end face of the bearing. Therefore, A tool is required to compress the bearing in the axial direction.
6. The retainer and sealing plate of the oil-free bearing must not be forced. The installation method of using a hammer and a casing is a commonly used method, because it will damage the bearing, so do not hit it directly. Be sure to tap in with the sleeve in the middle as shown in the picture. The hammer should strike lightly. In the mechanical structure, when the inner and outer rings are tightly fitted, a backing plate should be used, so that the force can be applied to the inner and outer rings at the same time. If only the inner ring is press-fitted, the force will be forced into the outer ring through the balls, thus causing scratches on the raceway surface. When installing a bearing with a large margin on the shaft, the method of heating the bearing to 80 to 90 degrees in clean oil to expand the inner diameter is widely used.
The basic requirements of the bearing on the material depend to a large extent on the working performance of the bearing. Whether the material used to manufacture rolling bearings is suitable will have a great influence on its performance and life. In general, the main failure forms of rolling bearings are fatigue spalling under alternating stress and loss of bearing accuracy due to friction and wear. In addition, there are also cracks, indentations, rust and other reasons that cause abnormal damage to the bearing. Therefore, rolling bearings should have high resistance to plastic deformation, less friction and wear, good rotational accuracy, good dimensional accuracy and stability, and long contact fatigue life. And many of these properties are determined by the material and heat treatment process.
Application of SF-2 boundary lubrication bearing: acid polyoxymethylene, with high wear resistance, bearing surface with regular arrangement and oil storage pit must be filled with lubricating grease when assembling, especially suitable for high load and low speed Under the condition of boundary lubrication, it can be used for a long time without refueling and maintenance, and refueling in the process can prolong the service life of the bearing. Extension, currently applicable to metallurgical machinery, mining machinery, water conservancy machinery, auto parts, construction machinery, agricultural machinery, etc. Oil-free self-lubricating bearing: The product is made of steel plate as the base, sintered spherical bronze powder in the middle layer, and a mixture of polytetrafluoroethylene [ptfe] and lead rolled on the surface layer. It has the characteristics of small friction coefficient, wear resistance, corrosion resistance, oil-free self-lubrication and long service life. Using it can reduce costs, reduce noise, and prevent sticking and slipping. It is widely used in sliding parts of various machinery such as printing presses, textile machines, hydraulic trucks, tobacco machines, medicinal machinery, fitness equipment, micro motors, automobiles, motorcycles, etc. Metal-based inlaid solid self-lubricating bearing: It is a novel lubricating bearing with both the characteristics of metal bearing and self-lubricating bearing. It has the characteristics of high bearing capacity, impact resistance, high temperature resistance and strong self-lubricating ability. Traditional oil-impregnated bearings: Due to the advantages of low noise and self-lubrication, oil-impregnated bearings have become the new favorite of computer CPU fan bearings, and the market demand is large; Applications in everyday household appliances are also expanding.
Installation Instructions
1. Although it is a small bump, protrusion, etc., if it is, it should be removed with oil grindstone or fine sandpaper.
2. It should be determined whether there are bumps, protrusions, etc. on the mating surface of the shaft center and shaft shell
3. Whether there is dust or mold sand attached to the bearing shell surface.
4. In order to avoid bumps during installation, a small amount of lubricating oil should be applied to the surface of the shaft and shaft housing. When installing the bearing on the shaft center, force must be applied to the inner ring, and when installing the bearing on the bearing shell, force must be applied to the outer ring. When applying force to the bearing, be careful to make the force go down vertically and evenly, otherwise the bearing will be injured. For this reason, try to avoid partial hits as much as possible.
5. The hardness of the bearing will be reduced due to overheating, so it must not exceed 100 degrees. At this time, the bearing must be suspended by steel wire, or placed on the wire guide, on the support plate, not on the bottom of the groove. When the bearing reaches the desired temperature (below 100 degrees), it should be taken out of the groove immediately and put into the shaft quickly. The bearing will shrink as the temperature drops, and sometimes there will be a gap between the shoulder and the end face of the bearing. Therefore, A tool is required to compress the bearing in the axial direction.
6. The retainer and sealing plate of the oil-free bearing must not be forced. The installation method of using a hammer and a casing is a commonly used method, because it will damage the bearing, so do not hit it directly. Be sure to tap in with the sleeve in the middle as shown in the picture. The hammer should strike lightly. In the mechanical structure, when the inner and outer rings are tightly fitted, a backing plate should be used, so that the force can be applied to the inner and outer rings at the same time. If only the inner ring is press-fitted, the force will be forced into the outer ring through the balls, thus causing scratches on the raceway surface. When installing a bearing with a large margin on the shaft, the method of heating the bearing to 80 to 90 degrees in clean oil to expand the inner diameter is widely used.
The basic requirements of the bearing on the material depend to a large extent on the working performance of the bearing. Whether the material used to manufacture rolling bearings is suitable will have a great influence on its performance and life. In general, the main failure forms of rolling bearings are fatigue spalling under alternating stress and loss of bearing accuracy due to friction and wear. In addition, there are also cracks, indentations, rust and other reasons that cause abnormal damage to the bearing. Therefore, rolling bearings should have high resistance to plastic deformation, less friction and wear, good rotational accuracy, good dimensional accuracy and stability, and long contact fatigue life. And many of these properties are determined by the material and heat treatment process.
