带均压槽的多孔集成节流静压气体轴承静态性能分析

Static performance analysis of porous integrated throttle static pressure gas bearing with equalizing groove

为了提升静压气体轴承的静态性能并探究其变化规律,文章研究了一种带均压槽的多孔集成节流静压气体轴承。通过推导气体润滑控制方程建立数学模型,并通过编程软件对离散化的控制方程进行求解计算,分析不同节流孔数量、供气压力、均压槽槽宽和均压槽槽深对静压气体轴承静态性能的影响规律。结果表明:与无均压槽多孔集成节流静压气体轴承相比,带均压槽的静压气体轴承承载力和刚度有了明显的提高;同时节流孔数量对带均压槽的多孔集成节流静压气体轴承的承载力影响显著,但孔数增加到一定程度后承载力增速减缓;均压槽槽宽对其承载力影响较小;均压槽槽深和供气压力对静压气体轴承的静态性能有明显影响。

To improve the static performance of the static pressure gas bearing and explore its change rule,a porous integrated throttle static pressure gas bearing with pressure equalizing groove is studied in this paper.A mathematical model was established by deducing the gas lubrication governing equation,and the discretized governing equation was solved and calculated by programming software.The effects of different orifice number,gas supply pressure,width and depth of equalizing groove on the static performance of the static pressure gas bearing were analyzed.The results show that the bearing capacity and stiffness of the gas bearing with pressure equalizing groove are improved compared with the porous integrated throttle gas bearing without pressure equalizing groove.At the same time,the number of throttling holes has a significant effect on the bearing capacity of the porous integrated throttling gas bearing with pressure equalizing groove.Still,the bearing capacity growth rate slows when the number of holes increases to a certain extent.The width of the equalizing groove has little effect on its bearing capacity.The depth of the equalizing groove and the gas supply pressure influence the static performance of the static-pressure gas bearing.