稳定间隙对变螺距螺杆泵回流的影响

IF 1.2 4区工程技术 Q3 ENGINEERING, MECHANICAL

Mechanics & Industry Pub Date : 2021-01-01 DOI:10.1051/meca/2021046

Li Zhang, Yongju Zhang, Ziyun Chen

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引用次数: 1

摘要

研究了变螺距螺杆泵不同间隙对泵腔内流场气体回流的影响。通过径向、法向等距修正对螺杆转子的理论齿面进行优化，得到转子周向、径向、齿形和齿边4种稳定间隙。改进了考虑Couette回流和孔板回流的间隙内回流计算模型。设计了变螺距螺杆真空泵的三维模型，研制了实验样机和试验装置。利用商业软件Ansys-Fluent®对真空泵内部回流进行了分析，并建立了计算模型。结果表明，间隙越小，回流越小，真空度越高。在四种间隙类型中，周向间隙起主要作用。回流与进口压力和转速成正比。实验数据验证了预测结果，结果吻合较好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Effects of stable clearances on backflow in the variable-pitch screw vacuum pump

Effects of various clearances of variable-pitch screw vacuum pump on gas backflow of internal flow field of the pump cavity is studied. The theoretical tooth surfaces of screw rotor are optimized by radial, normal equidistance modifications, and four types of stable clearances of rotor circumferential, radial, tooth shape and tooth sides are obtained. The backflow calculation model in clearances considering Couette backflow and orifice backflow is improved. The three-dimensional model of variable-pitch screw vacuum pump is designed, and the experimental prototype and test device are developed. The internal backflow of vacuum pump is analyzed by using the commercial software Ansys-Fluent® and the calculation model. The results show that the smaller the clearances, the smaller the backflow and the higher the vacuum degree. Among the four types of clearances, the circumferential clearance plays the primary roles. The backflow is directly proportional to the inlet pressure and rotating speed. Predictions are validated by the experimental data with satisfied agreement.

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来源期刊

Mechanics & Industry ENGINEERING, MECHANICAL-MECHANICS

CiteScore

2.80

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： An International Journal on Mechanical Sciences and Engineering Applications With papers from industry, Research and Development departments and academic institutions, this journal acts as an interface between research and industry, coordinating and disseminating scientific and technical mechanical research in relation to industrial activities. Targeted readers are technicians, engineers, executives, researchers, and teachers who are working in industrial companies as managers or in Research and Development departments, technical centres, laboratories, universities, technical and engineering schools. The journal is an AFM (Association Française de Mécanique) publication.