【摘要】 针对氟利昂静压气体轴承承载力不足的问题,建立了开设周向均压槽的静压止推气体轴承的计算模型,采用数值模拟的方法对比研究了分别以空气和R134a为工质时轴承承载性能随均压槽几何参数的变化规律。结果表明:在供气压力一定时,开设均压槽能将承载力提升一倍以上,而均压槽宽的改变对轴承的承载性能基本无影响;在均压槽深较小时,增加槽深可以增加轴承的承载力,但随着槽深的继续增大,轴承的承载力不再变化;均压槽几何参数对于质量流量的影响规律与承载力相似。更多还原

【Abstract】 The aerostatic gas bearings lubricated with Freon is an effective solution for the lubrication of heat pump in space, but the shortcoming is insufficient bearing capacity. To solve this problem, a calculation model for the aerostatic thrust gas bearing with circumferential pressure-equalizing grooves was established. The influence of the pressure-equalizing groove dimension on characteristics of thrust gas bearing lubricated with air or R134 a was investigated by numerical simulation. The results showed that the bearing capacity at least doubled after adding the pressure-equalizing groove, and the changes of the width of the pressure-equalizing groove had basically no effect on the bearing capacity of the gas bearing under the same supply pressure. When the pressure-equalizing groove depth was small, increasing the depth of the pressure-equalizing groove would increase the load capacity of the gas bearing. However, the load capacity of the bearing no longer changed as the depth of the pressure-equalizing groove continued to increase. In addition, the influence of pressure-equalizing groove dimension on mass flow rate of the bearing was similar to the load capacity of the gas bearing.更多还原