双螺杆真空泵新型正弦螺旋线型螺杆转子的设计与分析*

doi:10.13385/j.cnki.vacuum.2022.03.01

Abstract

Abstract: The cross-sectional profile of the existing screw rotor has sharp points and the contact line is discontinuous. To solve this problem and simplify the composition of the section profile, this paper uses a sinusoidal helix to smoothly connect the tooth tip arc and the tooth root arc, and then proposes a new type of fully meshed sinusoidal helical screw rotor. The meshing model of the sinusoidal helix and its conjugate curve are proposed, and the equation of the section profile is deduced. The influence of the radius ratios and helical central angle of the new section profile on the performance of the twin-screw vacuum pump is analyzed, and their reasonable value range is given. The results show that the section profile of the as-proposed new full meshing screw rotor is completely smooth, and the spatial contact line is continuous, which is beneficial to improve the performance of the twin-screw vacuum pump.

Key words: twin-screw vacuum pump, new-type screw rotor, sinusoidal helix, work performance

CLC Number:

TH36

ZHAO Xi-hao, ZHAO Li-zhuang, WANG Jun, LI Xue-qin, CUI Feng, WANG Zeng-li, GENG Mao-fei. Design and Analysis of New Sinusoidal Helical Screw Rotor for Twin-Screw Vacuum Pump[J].VACUUM, 2022, 59(3): 1-6.

References

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Design and Analysis of New Sinusoidal Helical Screw Rotor for Twin-Screw Vacuum Pump

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