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Methodology for generating a general profile of asymmetrical rotors of twin-screw vacuum pumps with point meshing feature by a pre-defined sealing line

刊名：	Proceedings of the Institution of Mechanical Engineers, Part B. Journal of engineering manufacture
作者：	Hoang, Minh-Thuan（Hung Yen Univ Technol & Educ） Tran, The-Van（Hung Yen Univ Technol & Educ）
刊号：	780C0002-B
ISSN：	0954-4054
出版年：	2023
年卷期：	2023, vol.237, no.10
页码：	1582-1595
总页数：	14
分类号：	TH16
关键词：	Pre-defined sealing line；point meshing feature；asymmetrical rotor；twin-screw vacuum pump；optimization profile；variable pitch；variable cross-section；TOOTH PROFILE；DESIGN；ERRORS
参考中译：	预定义密封线；点啮合特征；不对称转子；双螺杆真空泵；优化齿形；变螺距；变截面；齿形；设计；误差
语种：	eng
文摘：	The sealing line is one of the key influences on twin-screw rotor vacuum pump performance. The design of a rotor profile based on a sealing line for an asymmetrical rotor of a vacuum pump can be studied further to generate varied rotor profiles and improve pump performance. Therefore, this study proposes a mathematical model for a pre-defined sealing line to design and optimize varied rotor profiles of vacuum pumps. The general sealing line, pre-defined by explicit equations of straight lines and elliptic curves, is proposed to generate various rotor profiles with different numbers of lobes. The functions for parameter variables of the pre-defined sealing line are constructed and directly variated along the rotor length to form the screw rotor with a variable pitch and a variable cross-section. The proposed pre-defined sealing line is also applied in the optimal design of a rotor profile to enhance pump performance. Numerical examples are performed to verify the flexibility and practicability of the proposed method.
参考中译：	密封管路是影响双螺杆转子真空泵性能的关键因素之一。基于密封线的真空泵非对称转子型线的设计可以进一步研究，以产生不同的转子型线，提高泵的性能。因此，本研究提出了一种预定义密封线的数学模型，用于设计和优化真空泵的各种转子型线。提出了一种由直线和椭圆曲线的显式方程预先定义的通用密封线，以生成不同叶片数的不同转子型线。构造了预定义密封线参数变量的函数，并直接沿转子长度变化，形成变螺距、变截面的螺杆转子。所提出的预定义密封线也被应用于转子型线的优化设计，以提高泵的性能。数值算例验证了该方法的灵活性和实用性。