Bearings for alloys, bronze, aluminum-based alloys, zinc-based alloys, etc. are known as metal structural materials. Among them, bearing as well as alloy technology is also called a white alloy, mainly lead, tin, antimony, or some other metal alloy, it can be under heavy load, high speed, etc., and the strength impact is small. The reason is mainly because of its characteristics, good wear resistance type, high plasticity, good running together performance, good thermal conductivity, and good anti-gumming, and good adsorption with oil. However, because it is more expensive, it must be poured on bronze, steel strips, or cast iron shingles at the same time to form a thinner coating when it is used.
Types Of Metal Bushing
The main application of non-metallic materials studied the most is a variety of different plastics (polymer composites), such as phenolic resins, nylon, polytetrafluoroethylene, etc.. Polymer characteristics are: with many students chemical analysis substances do not react, anti-corrosion ability to carry out particularly strong; has China a certain self-lubricating, can work in the enterprise without lubrication conditions, in high temperature environmental conditions development has the existence of a certain lubrication management ability; embedded good; friction reduction and wear resistance are relatively good.
Porous Metallic Materials
This is a bearing material that is pressed and sintered using different metal powders. This material is porous in structure with a porosity of about 10% ~ 35% of the volume. Bearings made of this material are often called oil bearings because they are soaked in hot oil for several hours before use to fill the pores with lubricant.
Oil Impregnation bronze bushing is self-lubricating.
When working, due to the role of different journals rotating suction system and the effect of oil expansion when the bearing is hot, the oil will enter the economic friction material surface between the lubrication management role; when not working, because of the capillary effect, the oil will be sucked back to the bearing inside, so in a long time, even if we do not add lubricant can still get a good job. If we can supply oil regularly, the effect will be better. However, because of its relatively small toughness, it is suitable for the development of smooth and shock-free as well as load and low to medium growth rate change situations. Commonly used are porous iron and porous quality bronze. Porous iron is commonly used to design and make mill bushings, machine tool oil pump bushings, internal combustion engine camshaft bushings, etc.
Precautions For Bearing Use
Selection and control of shaft and bearing chamber tolerances
The bearing should rotate flexibly without blocking the feeling after pressing into the bearing. If there is obvious rotation inflexibility, it indicates that the size of the shaft is too large and the tolerance should be adjusted downward. If there is an obvious “rustling” feeling after the bearing is pressed into the shaft, the tolerance of the shaft may be too large or the roundness of the shaft is not good. So the control of the shaft and bearing room tolerances should also control the roundness. The bearing is not only good but also a good bearing.
Bearing assembly method.
Because the bearing chamber is a high-precision product, improper assembly can easily cause damage to the bearing groove and lead to bearing damage. Bearings in the assembly should have a special mold, and not be randomly knocked.
Prevention of foreign objects in an assembly
Bearings in the installation to the rotor to do dynamic balancing is easy to dynamic balancing when the iron particles are generated into the bearing inside, so it is best to do dynamic balancing before installing bearings
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