摘要
针对微孔化机械密封可以成效改善机械密封性能问题,探究考虑复合微孔对机械密封的承载力和泄漏量的变化规律,以揭示复合微孔具有较好的密封性能。首先,建立正五边形-椭圆形复合微孔流体膜的几何模型;其次,通过数值模拟研究了复合微孔织构化对机械密封摩擦副端面流场的压力分布,并与单一微孔进行了对比;最后,进行对比其不同微孔深度h_p、旋转速度n、面积比S_p和压力进口p_i等对密封性能的影响。结果表明,微孔深度3μm左右时,复合微孔的泄漏量和承载力均取得了最大值,开漏比取得了最小值;复合微孔的承载力和泄漏量均随着转速和进口压力的增大而增大;复合微孔化机械密封具有较大的承载力和较小的泄漏量,其开漏比优于单一微孔的开漏比,复合微孔化端面具有良好的密封性能。
Aiming at the problem that microporous mechanical seals can effectively improve the performance of mechanical seals,this paper explores the change law of bearing capacity and leakage of composite micropores on mechanical seals,so as to reveal that composite micropores have better sealing performance.Firstly,the geometric model of the regular pentagonal-oval composite microporous fluid membrane was established.Secondly,the pressure distribution of the composite microporous texture on the flow field of the friction pair end face of the mechanical seal was studied by numerical simulation,and compared with the single micropores.Finally,the effects of different micropore depths h p,rotation speeds n,area ratios S p and pressure inlets P i on the sealing performance were compared.The results show that when the micropore depth is about 3μm,the leakage amount and bearing capacity of the composite micropores have reached the maximum value,and the open-drain ratio has achieved the minimum value.The bearing capacity and leakage capacity of composite micropores increased with the increase of speed and inlet pressure.The composite microporous mechanical seal has a large bearing capacity and a small leakage amount,and its open-drain ratio is better than that of a single microporous,and the composite microporous end face has good sealing performance.
作者
杨天佑
穆塔里夫·阿赫迈德
王禹辉
YANG Tianyou;MUTELLIP Ahmat;WANG Yuhui(School of Mechanical Engineering,Xinjiang University,Urumqi 830047,China;School of Electrical Engineering,Xinjiang University,Urumqi 830047,China)
出处
《组合机床与自动化加工技术》
北大核心
2023年第9期120-123,共4页
Modular Machine Tool & Automatic Manufacturing Technique
基金
新疆维吾尔自治区自然科学基金项目(2021D01C045)。
关键词
机械密封
复合微孔
密封性能
承载力
泄漏量
mechanical seal
multi-shape micropores
sealing performance
bearing capacity
leakage
