The most popular way to buy bearing pedestal is to

2022-08-04
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Purchase of bearing block is a matter for attention in material selection

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in order to reduce friction and wear, various requirements are put forward for bearing bush materials. In addition to requiring small friction coefficient and wear resistance between friction pairs, the following points should also be met It shall have sufficient compressive strength, fatigue strength and impact resistance. The alloy thickness of bearing pedestal is (0..13) mm. Good adhesion resistance. When the load is large, the speed is high, the bearing seat clearance is too small, the surface finish is not high, and the lubrication is poor, attention should be paid to carefully selecting the material matching to prevent the adhesion, wear and gluing of the friction pair. It has adaptability and the ability to contain foreign matters. Materials with low hardness, good plasticity and low elastic coefficient have good adaptability and the ability to accommodate foreign matters. Good corrosion resistance, low price and sufficient source. The colloidal deposit formed by oxidation will corrode the bearing material. The commonly used materials for bearing shells and bearing seat liners are divided into two categories: metal materials and non-metal materials. Common grey cast iron, wear-resistant cast iron and ductile cast iron are suitable for bearing seats with low speed, light load or open transmission. Mechanism: the flake or spherical graphite components in the materials cover the surface to form a graphite layer for lubrication. Zchsnsb has good corrosion resistance, strong gluing resistance, strong combination with steel back, and high price. It is suitable for high-speed and heavy load. For example, locomotive and vehicle zchpbsb has poor gluing resistance, poor thermal expansion, and is brittle and suitable for medium speed and medium load. This Babbitt alloy has good wear resistance, anti scuffing, and high thermal conductivity. It is the most suitable bearing material. Zcupb30 is a bimetal cast or sintered on the inner surface of the steel back bearing bush. It has excellent adhesion resistance. Zcusn10-l has good friction reduction and wear resistance. It is the best bearing bush material. The hardness and strength of high-speed and heavy-duty materials are higher than that of Babbitt alloy. It is corrosion-resistant, but the running in performance is poor. However, the increase of quantity can not guarantee the synchronous improvement of quality. The matched journal requires high hardness and finish, which is suitable for medium speed and heavy-duty. Low tin aluminum alloy, containing sn0.5 high tin aluminum alloy, containing sn20%, locomotive diesel and other materials have high strength, corrosion resistance and good thermal conductivity. Iron powder + graphite powder or copper powder + graphite powder → press forming → sintering to form pore structure, with pores accounting for 15 ~ 35% → soaking in oil → oil bearing seat. Due to its poor toughness, the bearing bush is only suitable for stable load and medium and small speed, and is used in poor lubrication conditions

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