摘要
针对压缩机迷宫密封内部流场与泄漏量问题,对双侧迷宫密封结构中的气缸侧密封齿展开优化研究。设计三角形、矩形、摆线形3种气缸侧密封齿结构,选用不同的气缸与活塞侧密封齿的齿高、齿宽、密封齿间隙的几何比例(1∶2、1∶3、1∶4、1∶5、1∶6),建立不同结构的双侧密封齿密封模型,对其密封性能进行CFD动网格瞬态模拟,并与单侧密封齿密封结构进行了比较。结果表明:双侧密封齿密封结构的泄漏量相比单侧密封齿密封结构下降了25.8%~56.0%;3种不同形状的气缸侧密封齿密封性能由高到低依次为三角形、矩形、摆线形;不同几何比例的气缸侧密封齿模型中,密封性能从强到弱排列为1∶4、1∶5、1∶2、1∶6、1∶3。气缸侧与活塞侧迷宫齿几何比例为1∶4的三角形气缸侧密封齿结构的密封性能最优,相比单侧密封齿密封结构泄漏量下降了56%。
Aimed at the problem of internal flow field and leakage of compressor labyrinth seal,optimization research was carried out on the cylinder side sealing teeth in the double-sided labyrinth seal structure.Three types of cylinder side sealing tooth structures,such as triangular,rectangular,and cycloidal were designed,different geometric ratios of tooth height,tooth width,and sealing tooth clearance between the cylinder side and piston side sealing teeth were selected from 1∶2 to 1∶6,and the double-sided sealing models with different sealing tooth structures were established.The sealing performance of the double-sided sealing models was analyzed by CFD dynamic mesh transient simulation,and was compared with that of the single-sided sealing tooth structure model.The results show that the leakage of the double-sided sealing tooth structures reduced by 25.8% to 56.0% compared with the single-sided sealing tooth structure.The sealing performance of cylinder side sealing teeth with three different shapes is in descending order:triangular,rectangular,and cycloidal.Among the five different geometric ratios of cylinder side sealing tooth models,the sealing performance is arranged from strong to weak as 1∶4,1∶5,1∶2,1∶6,and 1∶3.The sealing performance of the triangular cylinder side sealing tooth structure that the geometric ratio of the sealing teeth between cylinder side and piston side is 1∶4 is the best,and the leakage rate is reduced by 56% compared to the single-sided sealing tooth structure.
作者
李政辉
张秀珩
李颖
王云帅
LI Zhenghui;ZHANG Xiuheng;LI Ying;WANG Yunshuai(Mechanical Engineering School,Shenyang Ligong University,Shenyang Liaoning 110159,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2024年第6期154-160,176,共8页
Lubrication Engineering
基金
辽宁省教育厅科学研究经费项目(青年科技人才“育苗”项目:LG202031)。
关键词
迷宫密封
结构优化
泄漏量
压缩机
密封性能
labyrinth seal
structural optimization
leakage
compressor
sealing performance
