摘要
以纯气体输送时的油气混输泵上游泵送螺旋槽机械密封为研究对象,基于气体润滑理论并采用有限差分法,在考虑密封环发生相对倾斜的情况下,研究操作参数、结构参数及密封环相对倾斜角对密封稳态性能的影响规律和作用机制.数值分析结果表明,相对于平行密封间隙,密封环发生相对倾斜时,会使膜厚减小区域的膜压峰值和膜压高压区范围明显增大,使膜厚增大区域的膜压峰值和膜压高压区范围明显减小;无论研究的参数如何变化,开启力、泄漏率及气膜刚度始终呈现出随着密封环相对倾角增大而增大的变化规律;通过增大转速、设计较小的平衡膜厚或优化型槽结构不仅可有效增强密封的上游泵送能力,以实现被密封介质的零泄漏,还可有效改善密封的开启性和稳定性.
Upstream pumping spiral groove mechanical seal of oil-gas mixture pump in gas transportation was taken as the research object, and based on gas lubrication theory and finite difference method, the influence of operation parameters and structure parameters on steady state performance of the seal were researched in the case of considering the relative inclination of seal rings. The numerical results indicate that, compared with film pressure distribution of parallel seal gap, the film pressure peak values and high pressure areas are obviously increased in the region of film thickness decreased when the seal rings have relative inclinations, and the film pressure peak values and high pressure areas are obviously decreased in the region of film thickness increased. No matter how the research parameters change, the opening force, leakage rate and gas film stiffness are all increasing with the increase of relative inclinations. Increasing the rotating speed, designing a smaller equilibrium film thickness or optimizing groove structure parameters can effectively enhance the upstream pumping capacity of the seal to achieve zero leakage of the sealed medium, and can effectively improve the opening performance and stability of the seal.
作者
潘国军
吴鑫燚
罗显文
连加俤
许静
PAN Guojun;WU Xinyi;LUO Xianwen;LIAN Jiadi;XU Jing(Teaching Center,Zhejiang Open University,Hangzhou,Zhejiang 310018,China;Department of Mechanical Engineering,China Jiliang University,Hangzhou,Zhejiang 310018,China;School of Mechanical Engineering,Hangzhou Dianzi University,Hangzhou,Zhejiang 310018,China)
出处
《排灌机械工程学报》
CSCD
北大核心
2021年第12期1203-1209,共7页
Journal of Drainage and Irrigation Machinery Engineering
基金
浙江省教育厅一般科研项目(Y201737701)
浙江省基础公益研究计划项目(LGF18E060001)。
关键词
油气混输泵
上游泵送
机械密封
密封端面倾斜
oil-gas mixture pump
upstream pumping
mechanical seal
misaligned seal face
