本文選題：幾何收斂點(diǎn)　切入點(diǎn)：泄漏率　出處：《摩擦學(xué)學(xué)報(bào)》2017年05期

【摘要】：采用解析法和數(shù)值計(jì)算相結(jié)合的方法,解釋橢圓微孔端面機(jī)械密封的方向角所引起的幾何特性改變?nèi)绾斡绊懙叫孤┞?首先,得到了不同方向角下,橢圓沿速度方向上的幾何收斂點(diǎn)的解析解.然后,基于質(zhì)量守恒的JFO空化邊界條件建立數(shù)值計(jì)算模型,分析了液膜的壓力分布,并使用最高壓力點(diǎn)的坐標(biāo)來(lái)近似表征高壓區(qū)的位置,得到了方向角與最高壓力點(diǎn)的關(guān)系.接著,通過(guò)對(duì)比,發(fā)現(xiàn)幾何收斂點(diǎn)和最大壓力點(diǎn)位置一致,并分析了原因.最后,分析了在不同結(jié)構(gòu)參數(shù)和操作參數(shù)下方向角對(duì)泄漏率的影響規(guī)律,通過(guò)分析得到,方向角的改變,使幾何收斂點(diǎn)的位置發(fā)生改變,從而改變高低壓區(qū)的分布,當(dāng)高壓區(qū)靠近泄漏出口時(shí),泄漏率大;當(dāng)高壓區(qū)遠(yuǎn)離泄漏出口時(shí),泄漏率小.
[Abstract]:The method of combining analytical method with numerical calculation is used to explain how the change of geometric characteristics caused by the direction angle of the mechanical seal with elliptical microholes affects the leakage rate.Firstly, the analytic solution of the geometric convergence point of the ellipse along the velocity direction is obtained at different direction angles.Then, based on the JFO cavitation boundary condition of mass conservation, the numerical model is established, and the pressure distribution of the liquid film is analyzed. The position of the high pressure region is approximately represented by the coordinates of the highest pressure point, and the relationship between the direction angle and the maximum pressure point is obtained.Then, it is found that the position of the geometric convergence point and the maximum pressure point are the same, and the reason is analyzed.Finally, the influence of directional angle on leakage rate under different structure parameters and operation parameters is analyzed. By analyzing the change of directional angle, the position of geometric convergence point is changed, and the distribution of high and low pressure region is changed.When the high pressure area is near the leakage outlet, the leakage rate is large, and when the high pressure area is away from the leakage outlet, the leakage rate is small.
【作者單位】： 四川大學(xué)化學(xué)工程學(xué)院;
【分類號(hào)】：TH136

【相似文獻(xiàn)】

相關(guān)期刊論文 前4條

1 辛復(fù)聚;;平面應(yīng)力狀態(tài)下主應(yīng)力與主方向角的對(duì)應(yīng)關(guān)系[J];青島化工學(xué)院學(xué)報(bào);1989年02期

2 付方元;;橢圓儀[J];機(jī)械設(shè)計(jì);1987年03期

3 廖林清;藺朝莉;屈翔;謝明;;影響V帶當(dāng)量摩擦因數(shù)的摩擦力方向角研究[J];機(jī)械傳動(dòng);2011年11期

4 瞿雷;陳余平;張建峰;金穎;屈運(yùn)動(dòng);;全息譜轉(zhuǎn)頻橢圓特征參數(shù)的改進(jìn)及應(yīng)用[J];蘭州理工大學(xué)學(xué)報(bào);2014年02期

，

本文編號(hào)：1704610