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针对机床高速运转过程中滚珠丝杠副螺母发热严重的问题,提出了将螺母加工成空心并通入冷却介质来抑制螺母温升的方法,把这种螺母称为空心螺母。以主轴油作为冷却介质,运用CFX软件,分析了通入主轴油流速不同情况下空心螺母腔体内流场及温度场的变化规律;分析了滚珠丝杠转速和轴向载荷对螺母温升的影响。通过以上分析,揭示了空心螺母腔体内流场随着冷却介质流速的变化规律和温度场的分布情况,以及滚珠丝杠的轴向载荷和转速对空心螺母温升的影响。空心螺母的提出对机床的发展具有深远意义。
Aiming at the serious heating problem of the ball screw nut during the high speed operation of the machine tool, a method of processing the nut into a hollow and passing a cooling medium to restrain the temperature rise of the nut is proposed. The nut is called a hollow nut. Using the spindle oil as the cooling medium, the variation rules of the flow field and the temperature field in the cavity of the hollow nut were analyzed by CFX software. The influence of the ball screw speed and the axial load on the temperature rise of the nut was analyzed . Through the above analysis, the variation of the flow field in the hollow nut cavity with the cooling medium flow rate and the distribution of the temperature field are revealed, and the influence of the axial load and speed of the ball screw on the temperature rise of the hollow nut is revealed. Hollow nut proposed on the development of machine tools has far-reaching significance.