Effects of stable clearances on backflow in the variable-pitch screw vacuum pump
نویسندگان
چکیده
Effects of various clearances variable-pitch screw vacuum pump on gas backflow internal flow field the cavity is studied. The theoretical tooth surfaces rotor are optimized by radial, normal equidistance modifications, and four types stable circumferential, shape sides obtained. calculation model in considering Couette orifice improved. three-dimensional designed, experimental prototype test device developed. analyzed using commercial software Ansys-Fluent® model. results show that smaller clearances, higher degree. Among circumferential clearance plays primary roles. directly proportional to inlet pressure rotating speed. Predictions validated data with satisfied agreement.
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ژورنال
عنوان ژورنال: Mechanics & Industry
سال: 2021
ISSN: ['2257-7750', '2257-7777']
DOI: https://doi.org/10.1051/meca/2021046