Views: 21 Author: Site Editor Publish Time: 2021-09-05 Origin: Site
Using ceramic materials to replace steel and other metal materials as rolling elements, the purpose is to use ceramic balls that are better than bearing steel balls in wear resistance, corrosion resistance, high temperature resistance, electrical insulation (except SiC), non-magnetic, high strength, high rigidity, Performance such as small proportion.
The use of ceramic materials can make the bearing run normally at higher speeds, harsher environments and low lubrication situations, and can reduce wear, reduce noise, reduce vibration, and make maintenance easier, so as to achieve longer bearing life and greatly improve Its performance and reliability. Ceramic materials suitable for making bearings.
Hybrid ceramic bearings include hybrid ceramic ball bearings and hybrid ceramic cylindrical roller bearings. Hybrid ceramic bearings are assembled from bearing steel rings and bearing-grade silicon nitride rolling elements (Si3N4). The bearings have electrical Insulation characteristics.
Silicon nitride rolling elements can provide higher bearing performance even under harsh working conditions, thereby prolonging the service life of the bearing.
Hybrid ceramic ball bearings, especially silicon nitride ball hybrid ceramic bearings, have the characteristics of low density, high hardness, low friction coefficient, anti-magnetic and electrical insulation, wear resistance, self-lubricating and good rigidity, good acid and alkali resistance, self-lubricating function, High temperature resistance above 300°C, high wear resistance, high speed greatly reduces rolling, friction and heat generation, long service life is 3 to 5 times that of all-steel bearings, light weight, ceramic material is 60% lighter than steel, and the same rigidity The elastic mold of ceramic material is 50% higher than that of bearing steel.
Hybrid ceramic ball bearings are particularly suitable for high-speed, high-precision and long-life steel-ceramic hybrid bearings rolling elements (the inner and outer rings are made of metal). Generally, the inner and outer rings are made of bearing steel or stainless steel, and the ceramic balls can be made of ZrO2, Si3N4, or SiC.
Among them, Si3N4 has superior comprehensive performance and has become the preferred material for steel-ceramic hybrid ceramic bearings.
Bearing structure: bearing steel ferrule, or stainless steel ferrule + ceramic ball + nylon retainer + rubber seal