Research On Improve The Main Shaft Bearings Life Of The Engine

when rolling bearings is used in rotating machinery , about 30% of the mechanical failure was caused by bearing failure,therefore,raising the bearing quality will have far-reaching significance on the overall level of China's manufacturing industry.The bearing industry requirements the develop direction of bearing to "the high life, high reliability",in particular, required the spindle bearings of engine to adapt in the state of high-speed, high temperature, large load, long-lived work, which need to improve the bearing structure, materials, and improve manufacturing precision so that to accommodate these working conditions. The target of this issue is: the spindle bearing life of motor increased from the current 600 hours to 900 hours.Combined bearing Manufacture experience and the status of use, in order to achieve this goal, take as the following improved way:First, Bearing ring material used the newest low-carbon heat-resistant steel SG13Cr4Mo4Ni4V developed by china , this is a breakthrough in the field of spindle bearings; second,to maintain retainers material as high-quality steel 40CrNiMoA, the material can resistance to high temperature, wear, and have high carrying capacity; third,to improve the manufacturing precision of bearing components.First for ferrule and retainers model experiments ,gain the physical, chemical characteristics of low-carbon heat-resistant steel SG13Cr4Mo4Ni4V material bearing ring when in carburizing, heat treatment and mechanical processing, gaining the rocessing characteristics of 40CrNiMo material retainers. Combination of ferrule and retainers structure characteristics,choosing reasonable processing equipment and cutting tools, design the tooling that more suitable for production, to determine a reasonable turning grinding processing method, finaly,to form the complete ferrule processing and retainers processing. In accordance with the development of process routes for mass production, the manufacture precision of bearings increased than the original, bearing life increased by half than the original, and ultimately to improve the life of the spindle bearing, to meet product quality requirements.