【摘要】：以某反應(yīng)堆主泵推力滑動軸承試驗臺加載裝置為研究對象,考慮慣性離心作用和潤滑油粘溫效應(yīng),基于N-S方程建立三維油膜熱流固耦合有限元分析模型,研究慣性離心和熱彈變形對原型大尺寸高速高壓推力加載裝置承載性能的影響,并對加載裝置進行結(jié)構(gòu)改進計算與試驗,為實際大尺寸推力加載裝置設(shè)計與應(yīng)用提供重要依據(jù)和參考。結(jié)果表明:高轉(zhuǎn)速慣性離心作用改變加載裝置內(nèi)部流動,增加入口油壓可以有效提高承載能力;熱彈變形對承載力有顯著影響,考慮潤滑油粘溫效應(yīng)使油膜承載力降低12.6%;當(dāng)熱彈變形量過大將導(dǎo)致油膜破裂,加載裝置由液體潤滑狀態(tài)變?yōu)楦赡Σ翣顟B(tài),發(fā)生燒瓦停機現(xiàn)象;將原環(huán)形整體單腔結(jié)構(gòu)改進成扇形三腔結(jié)構(gòu)油膜承載力較初始結(jié)構(gòu)提高了22.5%;改進裝置加載試驗驗證了改進方案的可行性和數(shù)值模擬方法的適用性。
[Abstract]:Taking the loading device of thrust sliding bearing of a reactor main pump as the research object, considering the effect of inertial centrifugation and lubricant viscosity temperature, a three-dimensional finite element analysis model of oil-film heat fluid-solid coupling is established based on N-S equation. The influence of inertial centrifugation and thermoelastic deformation on the load-bearing performance of the prototype large-size high-speed high-pressure thrust loading device is studied, and the structural improvement calculation and test of the loading device are carried out. It provides important basis and reference for the design and application of practical large-scale thrust loading device. The results show that the high rotational speed inertial centrifugation can change the internal flow of the loading device, increase the inlet oil pressure can effectively improve the bearing capacity, and the thermoelastic deformation has a significant effect on the bearing capacity. Considering the viscous temperature effect of lubricating oil, the bearing capacity of oil film is reduced by 12.6%, when the amount of thermoelastic deformation is too large, it will lead to oil film rupture, the loading device will change from liquid lubrication state to dry friction state, and the phenomenon of burning tile will be stopped. The oil film bearing capacity of the original annular monolithic cavity is improved by 22.5% than that of the initial structure, and the feasibility of the improved scheme and the applicability of the numerical simulation method are verified by the loading test of the improved device.
【作者單位】： 湘潭大學(xué)機械工程學(xué)院;
【基金】：國家自然科學(xué)基金項目(51305377) 教育部留學(xué)回國人員科研啟動基金(教外司留[2015]1098號)
【分類號】：TH133.31

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