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福州动力机厂使用的M8230曲轴磨床,按说明书要求用2号主轴油或以90％煤油和10％22号汽轮机油掺配使用,均抱轴烧结。最后经刮轴瓦后再用2号主轴油,才能正常运转。经分析抱轴烧结的原因是: (1)由于精密机床精度提高,2号主轴油粘度过低,形成油膜强度不够,易受破坏而烧结。另因为磨床主轴转速愈高,线速度愈大,形成动压油膜也愈强,故在高速1000r/min下,低粘度的主轴油已足够保证较强的油膜,但在磨床头架主轴转速只有35、70、140、280r/min以内,油膜强度却有赖于较高粘度,由此可见,2号主轴油不适用于曲轴磨床。
Fuzhou Power Plant M8230 crankshaft grinder used, according to the instructions require the use of No. 2 spindle oil or 90% kerosene and 10% 22 turbine oil blending with the use of axle sintering. After the last by scraping pad and then No. 2 spindle oil, to normal operation. The analysis of the reason for the shaft sintering is: (1) As precision precision machine tool to improve the viscosity of No. 2 spindle oil is too low, the formation of film strength is not enough, vulnerable to damage and sintering. The other because the higher the spindle speed grinder, the greater the linear velocity, the formation of dynamic pressure oil film is also stronger, so at high speed 1000r / min, the low viscosity of the spindle oil is sufficient to ensure a strong film, but the grinder headstock spindle speed only 35,70,140,280 r / min or less, the oil film strength depends on the higher viscosity, we can see that No. 2 spindle oil is not suitable for crankshaft grinder.