Abstract
AbstractThis study presents two new cycloid rotor profiles for Roots vacuum pump formed by different rolling circle radii to improve the volume utilization rate and compression ratio. A new rotor profile composed of a pin-tooth arc and a cycloid is design and analyzed where its rolling circle radius is larger than 1/4 of the pitch radius. As the rolling circle radius increases, the volume utilization rate continues to increase and can be greater than 60%, which is an increase of 20% relative to the standard cycloid profile. In addition, another new rotor profile composed of a large arc and a cycloid is designed and analyzed where its rolling circle radius is smaller than 1/4 of the pitch radius. As the rolling circle radius decreases, the length of the minimum gap between rotor profile and chamber increases, which is beneficial for improving the compression ratio and reducing backflow.
Funder
Science and Technology Program of Gansu Province
Publisher
Springer Science and Business Media LLC
Subject
General Earth and Planetary Sciences,General Physics and Astronomy,General Engineering,General Environmental Science,General Materials Science,General Chemical Engineering