文章基本信息

标题：A novel design on smooth rotor profile with meshing clearance for screw vacuum pump
本地全文：下载
作者：Li Zhang ; Yang Liu ; Yongju Zhang 等
期刊名称：Advances in Mechanical Engineering
印刷版ISSN：1687-8140
电子版ISSN：1687-8140
出版年度：2022
卷号：14
期号：1
页码：1-11
DOI：10.1177/16878140211070444
语种：English
出版社：Sage Publications Ltd.
摘要：Cross-section profile of rotor takes a great effect on the performance of dry-screw vacuum pump. A novel smooth rotor profile consisting of eight segments of curves, including arcs and conjugate correction curves is proposed. Advantages are that it can be used to solve the unsmooth connection and no meshing clearance in traditional profile. The meshing model for new profile can directly generate stable addendum clearance, tooth clearance, tooth side clearance, and radial clearance. The influences of the epicycloid rotation angle, arc radius and involute offset distance of the conjugate correction curve on the clearances are studied according to established theoretical model. And transient flow field of vacuum pump is analyzed by using the commercial software Ansys-Fluent®. Compared to traditional screw vacuum pump, the results shows that pressure in inlet and pump cavity is lower, and maximum pumping speed is higher, indicating that the proposed design is superior.
关键词：Screw vacuum pump;screw rotor;cross-section profile;correction curve;meshing clearance;flow field simulation